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suwako / VulkanExample

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テクニカル諏訪子 <suwako@076.moe>、2026-07-22 17:39
コミット 2ebd091d9f7f321dd07d21ece263626946a4603e ・親 7f9eef1 ・ファイルを見る

11個のファイル、+8305 -67

変更 .gitignore

		@@ -2,3 +2,4 @@
2	2	*.user
3	3	*.spv
4	4	.vs
	5	+VulkanExample/ass

変更 VulkanExample/VulkanExample.vcxproj

		@@ -115,7 +115,10 @@
115	115	<PostBuildEvent>
116	116	<Command>$(VULKAN_SDK)\Bin\glslc.exe $(ProjectDir)shader.vert -o $(ProjectDir)vert.spv
117	117	$(VULKAN_SDK)\Bin\glslc.exe $(ProjectDir)shader.frag -o $(ProjectDir)frag.spv
118		-$(VULKAN_SDK)\Bin\slangc.exe $(ProjectDir)shader.slang -target spirv -profile spirv_1_4 -emit-spirv-directly -fvk-use-entrypoint-name -entry vertMain -entry fragMain -o slang.spv</Command>
	118	+$(VULKAN_SDK)\Bin\slangc.exe $(ProjectDir)shader.slang -target spirv -profile spirv_1_4 -emit-spirv-directly -fvk-use-entrypoint-name -entry vertMain -entry fragMain -o slang.spv
	119	+
	120	+if not exist "$(ProjectDir)ass" mkdir $(ProjectDir)ass
	121	+robocopy /XO $(SolutionDir)ass $(ProjectDir)ass /XO /E /R:3 /W:5 /MT /NP /NDL /NFL</Command>
119	122	</PostBuildEvent>
120	123	</ItemDefinitionGroup>
121	124	<ItemDefinitionGroup Condition="'$(Configuration)\|$(Platform)'=='Release\|x64'">
		@@ -139,7 +142,10 @@
139	142	<PostBuildEvent>
140	143	<Command>$(VULKAN_SDK)\Bin\glslc.exe $(ProjectDir)shader.vert -o $(ProjectDir)vert.spv
141	144	$(VULKAN_SDK)\Bin\glslc.exe $(ProjectDir)shader.frag -o $(ProjectDir)frag.spv
142		-$(VULKAN_SDK)\Bin\slangc.exe $(ProjectDir)shader.slang -target spirv -profile spirv_1_4 -emit-spirv-directly -fvk-use-entrypoint-name -entry vertMain -entry fragMain -o slang.spv</Command>
	145	+$(VULKAN_SDK)\Bin\slangc.exe $(ProjectDir)shader.slang -target spirv -profile spirv_1_4 -emit-spirv-directly -fvk-use-entrypoint-name -entry vertMain -entry fragMain -o slang.spv
	146	+
	147	+if not exist "$(ProjectDir)ass" mkdir $(ProjectDir)ass
	148	+robocopy /XO $(SolutionDir)ass $(ProjectDir)ass /XO /E /R:3 /W:5 /MT /NP /NDL /NFL</Command>
143	149	</PostBuildEvent>
144	150	</ItemDefinitionGroup>
145	151	<ItemGroup>

変更 VulkanExample/main.cc

		@@ -17,6 +17,10 @@
17	17	#include <cassert>
18	18
19	19	#include <util/root.hh>
	20	+
	21	+#define STB_IMAGE_IMPLEMENTATION
	22	+#include <stb_image.hh>
	23	+
20	24	VULKAN_HPP_DEFAULT_DISPATCH_LOADER_DYNAMIC_STORAGE
21	25
22	26	constexpr int MAX_FRAMES_IN_FLIGHT = 2;
		@@ -52,6 +56,11 @@
52	56	vk::Buffer idxBuf = nullptr;
53	57	vk::DeviceMemory idxBufMem = nullptr;
54	58
	59	+vk::Image texImg = nullptr;
	60	+vk::DeviceMemory texImgMem = nullptr;
	61	+vk::ImageView texImgView = nullptr;
	62	+vk::Sampler texSampler = nullptr;
	63	+
55	64	std::vector<vk::Buffer> uniformBufs;
56	65	std::vector<vk::DeviceMemory> uniformBufsMem;
57	66	std::vector<void *> uniformBufsMapped;
		@@ -176,31 +185,37 @@
176	185	swapChainImages = device.getSwapchainImagesKHR(swapChain);
177	186	}
178	187
179		-void createImageViews() {
180		- assert(swapChainImageViews.empty());
181		-
	188	+vk::ImageView createImageView(const vk::Image &image, vk::Format format) {
182	189	vk::ImageSubresourceRange subrange = {};
183	190	subrange.aspectMask = vk::ImageAspectFlagBits::eColor;
	191	+ subrange.baseMipLevel = 0;
184	192	subrange.levelCount = 1;
	193	+ subrange.baseArrayLayer = 0;
185	194	subrange.layerCount = 1;
186	195
187	196	vk::ImageViewCreateInfo imgViewCreateInfo = {};
	197	+ imgViewCreateInfo.image = image;
188	198	imgViewCreateInfo.viewType = vk::ImageViewType::e2D;
189		- imgViewCreateInfo.format = swapChainFormat.format;
	199	+ imgViewCreateInfo.format = format;
190	200	imgViewCreateInfo.subresourceRange = subrange;
191		- imgViewCreateInfo.components = {
192		- vk::ComponentSwizzle::eIdentity,
193		- vk::ComponentSwizzle::eIdentity,
194		- vk::ComponentSwizzle::eIdentity,
195		- vk::ComponentSwizzle::eIdentity,
196		- };
197	201
	202	+ return device.createImageView(imgViewCreateInfo);
	203	+}
	204	+
	205	+void createImageViews() {
	206	+ assert(swapChainImageViews.empty());
	207	+
	208	+ swapChainImageViews.reserve(swapChainImages.size());
	209	+
198	210	for (auto &img : swapChainImages) {
199		- imgViewCreateInfo.image = img;
200		- swapChainImageViews.push_back(device.createImageView(imgViewCreateInfo));
	211	+ swapChainImageViews.emplace_back(createImageView(img, swapChainFormat.format));
201	212	}
202	213	}
203	214
	215	+void createTextureImageView() {
	216	+ texImgView = createImageView(texImg, vk::Format::eR8G8B8A8Srgb);
	217	+}
	218	+
204	219	void cleanupSwapChain() {
205	220	for (auto &view : swapChainImageViews) device.destroyImageView(view);
206	221	swapChainImageViews.clear();
		@@ -235,6 +250,34 @@
235	250	}
236	251	#pragma endregion
237	252
	253	+#pragma region cmdBufHelpers
	254	+vk::CommandBuffer beginSingleTimeCommands() {
	255	+ vk::CommandBufferAllocateInfo allocInfo = {};
	256	+ allocInfo.commandPool = cmdPool;
	257	+ allocInfo.level = vk::CommandBufferLevel::ePrimary;
	258	+ allocInfo.commandBufferCount = 1;
	259	+
	260	+ vk::CommandBuffer commandBuffer = std::move(device.allocateCommandBuffers(allocInfo).front());
	261	+
	262	+ vk::CommandBufferBeginInfo beginInfo = {};
	263	+ beginInfo.flags = vk::CommandBufferUsageFlagBits::eOneTimeSubmit;
	264	+ commandBuffer.begin(beginInfo);
	265	+
	266	+ return std::move(commandBuffer);
	267	+}
	268	+
	269	+void endSingleTimeCommands(vk::CommandBuffer &&commandBuffer) {
	270	+ commandBuffer.end();
	271	+
	272	+ vk::SubmitInfo submitInfo = {};
	273	+ submitInfo.commandBufferCount = 1;
	274	+ submitInfo.pCommandBuffers = &commandBuffer;
	275	+
	276	+ gfxQueue.submit(submitInfo, nullptr);
	277	+ gfxQueue.waitIdle();
	278	+}
	279	+#pragma endregion
	280	+
238	281	#pragma region recordCmdBuf
239	282	void recordCmdBuf(uint32_t imgIdx) {
240	283	cmdBuf.reset();
		@@ -265,7 +308,7 @@
265	308
266	309	cmdBuf.beginRendering(renderingInfo);
267	310	cmdBuf.bindPipeline(vk::PipelineBindPoint::eGraphics, gfxPipeline);
268		- cmdBuf.bindVertexBuffers(0, vertBuf, {0});
	311	+ cmdBuf.bindVertexBuffers(0, vertBuf, { 0 });
269	312	cmdBuf.bindIndexBuffer(idxBuf, 0, vk::IndexType::eUint16);
270	313	cmdBuf.bindDescriptorSets(vk::PipelineBindPoint::eGraphics, pipelineLayout, 0, descriptorSets[frameIdx], nullptr);
271	314	cmdBuf.setViewport(0, vk::Viewport(0.f, 0.f,
		@@ -307,24 +350,92 @@
307	350	}
308	351
309	352	void copyBuffer(vk::Buffer &srcBuf, vk::Buffer &dstBuf, vk::DeviceSize size) {
310		- vk::CommandBufferAllocateInfo allocInfo = {};
311		- allocInfo.commandPool = cmdPool;
312		- allocInfo.level = vk::CommandBufferLevel::ePrimary;
313		- allocInfo.commandBufferCount = 1;
314		-
315		- vk::CommandBuffer cmdCopyBuf = std::move(device.allocateCommandBuffers(allocInfo).front());
316		- vk::CommandBufferBeginInfo beginInfo = {};
317		- beginInfo.flags = vk::CommandBufferUsageFlagBits::eOneTimeSubmit;
318		- cmdCopyBuf.begin(beginInfo);
	353	+ vk::CommandBuffer cmdCopyBuf = beginSingleTimeCommands();
319	354	cmdCopyBuf.copyBuffer(srcBuf, dstBuf, vk::BufferCopy(0, 0, size));
320		- cmdCopyBuf.end();
	355	+ endSingleTimeCommands(std::move(cmdCopyBuf));
	356	+}
	357	+#pragma endregion
321	358
322		- vk::SubmitInfo submitInfo = {};
323		- submitInfo.commandBufferCount = 1;
324		- submitInfo.pCommandBuffers = &cmdCopyBuf;
325		- gfxQueue.submit(submitInfo, nullptr);
326		- gfxQueue.waitIdle();
	359	+#pragma region createImage
	360	+std::pair<vk::Image, vk::DeviceMemory> createImage(uint32_t width, uint32_t height, vk::Format format, vk::ImageTiling tiling, vk::ImageUsageFlags usage, vk::MemoryPropertyFlags props) {
	361	+ vk::ImageCreateInfo imgInfo = {};
	362	+ imgInfo.imageType = vk::ImageType::e2D;
	363	+ imgInfo.format = format;
	364	+ imgInfo.extent = { { width, height, 1 } };
	365	+ imgInfo.mipLevels = 1;
	366	+ imgInfo.arrayLayers = 1;
	367	+ imgInfo.samples = vk::SampleCountFlagBits::e1;
	368	+ imgInfo.tiling = tiling;
	369	+ imgInfo.usage = usage;
	370	+ imgInfo.sharingMode = vk::SharingMode::eExclusive;
	371	+
	372	+ vk::Image img = device.createImage(imgInfo);
	373	+
	374	+ vk::MemoryRequirements memReq = device.getImageMemoryRequirements(img);
	375	+ vk::MemoryAllocateInfo allocInfo = {};
	376	+ allocInfo.allocationSize = memReq.size;
	377	+ allocInfo.memoryTypeIndex = findMemoryType(memReq.memoryTypeBits, props);
	378	+
	379	+ vk::DeviceMemory alloc = device.allocateMemory(allocInfo);
	380	+ device.bindImageMemory(img, alloc, 0);
	381	+
	382	+ return { std::move(img), std::move(alloc) };
327	383	}
	384	+
	385	+void copyBufferToImage(vk::CommandBuffer &commandBuffer, const vk::Buffer &buffer, vk::Image &image, uint32_t width, uint32_t height) {
	386	+ vk::ImageSubresourceLayers subresourceLayers = {};
	387	+ subresourceLayers.aspectMask = vk::ImageAspectFlagBits::eColor;
	388	+ subresourceLayers.mipLevel = 0;
	389	+ subresourceLayers.baseArrayLayer = 0;
	390	+ subresourceLayers.layerCount = 1;
	391	+
	392	+ vk::BufferImageCopy region = {};
	393	+ region.bufferOffset = 0;
	394	+ region.bufferRowLength = 0;
	395	+ region.bufferImageHeight = 0;
	396	+ region.imageSubresource = subresourceLayers;
	397	+ region.imageOffset = {{ 0, 0, 0 }};
	398	+ region.imageExtent = {{ width, height, 1 }};
	399	+
	400	+ commandBuffer.copyBufferToImage(buffer, image, vk::ImageLayout::eTransferDstOptimal, region);
	401	+}
	402	+
	403	+void transitionImageLayout(vk::CommandBuffer &commandBuffer, const vk::Image &image, vk::ImageLayout oldLayout, vk::ImageLayout newLayout) {
	404	+ vk::ImageSubresourceRange subresourceRange = {};
	405	+ subresourceRange.aspectMask = vk::ImageAspectFlagBits::eColor;
	406	+ subresourceRange.levelCount = 1;
	407	+ subresourceRange.layerCount = 1;
	408	+
	409	+ vk::ImageMemoryBarrier barrier = {};
	410	+ barrier.oldLayout = oldLayout;
	411	+ barrier.newLayout = newLayout;
	412	+ barrier.srcQueueFamilyIndex = vk::QueueFamilyIgnored;
	413	+ barrier.dstQueueFamilyIndex = vk::QueueFamilyIgnored;
	414	+ barrier.image = image;
	415	+ barrier.subresourceRange = subresourceRange;
	416	+
	417	+ vk::PipelineStageFlags srcStage = {};
	418	+ vk::PipelineStageFlags dstStage = {};
	419	+
	420	+ if (oldLayout == vk::ImageLayout::eUndefined && newLayout == vk::ImageLayout::eTransferDstOptimal) {
	421	+ barrier.srcAccessMask = {};
	422	+ barrier.dstAccessMask = vk::AccessFlagBits::eTransferWrite;
	423	+
	424	+ srcStage = vk::PipelineStageFlagBits::eTopOfPipe;
	425	+ dstStage = vk::PipelineStageFlagBits::eTransfer;
	426	+ } else if (oldLayout == vk::ImageLayout::eTransferDstOptimal && newLayout == vk::ImageLayout::eShaderReadOnlyOptimal) {
	427	+ barrier.srcAccessMask = vk::AccessFlagBits::eTransferWrite;
	428	+ barrier.dstAccessMask = vk::AccessFlagBits::eShaderRead;
	429	+
	430	+ srcStage = vk::PipelineStageFlagBits::eTransfer;
	431	+ dstStage = vk::PipelineStageFlagBits::eFragmentShader;
	432	+ } else {
	433	+ assert(false && "レイアウトは未対応です。");
	434	+ return;
	435	+ }
	436	+
	437	+ commandBuffer.pipelineBarrier(srcStage, dstStage, {}, {}, nullptr, barrier);
	438	+}
328	439	#pragma endregion
329	440
330	441	int main() {
		@@ -469,8 +580,10 @@
469	580	vk::PhysicalDeviceVulkan11Features,
470	581	vk::PhysicalDeviceVulkan13Features,
471	582	vk::PhysicalDeviceExtendedDynamicStateFeaturesEXT>();
472		- bool supportReqFeature = features.template get<vk::PhysicalDeviceVulkan13Features>().dynamicRendering
473		- && features.template get<vk::PhysicalDeviceExtendedDynamicStateFeaturesEXT>().extendedDynamicState;
	583	+ bool supportReqFeature = features.template get<vk::PhysicalDeviceFeatures2>().features.samplerAnisotropy
	584	+ && features.template get<vk::PhysicalDeviceVulkan13Features>().dynamicRendering
	585	+ && features.template get<vk::PhysicalDeviceVulkan13Features>().synchronization2
	586	+ && features.template get<vk::PhysicalDeviceExtendedDynamicStateFeaturesEXT>().extendedDynamicState;
474	587
475	588	if (!supportAllExt \|\| !supportsGfx \|\| !supportReqFeature) {
476	589	assert(false && "利用可能なGPUを見つけられませんでした。");
		@@ -502,6 +615,7 @@
502	615	float queuePriority = .5f;
503	616
504	617	vk::PhysicalDeviceFeatures2 baseFeatures{};
	618	+ baseFeatures.features = {{ .samplerAnisotropy = true }};
505	619	vk::PhysicalDeviceVulkan11Features features11{};
506	620	features11.shaderDrawParameters = true;
507	621	vk::PhysicalDeviceVulkan13Features features13{};
		@@ -547,15 +661,27 @@
547	661	#pragma endregion
548	662
549	663	#pragma region descriptorSetLayout
550		- vk::DescriptorSetLayoutBinding uboLayoutBinding = {};
551		- uboLayoutBinding.binding = 0;
552		- uboLayoutBinding.descriptorType = vk::DescriptorType::eUniformBuffer;
553		- uboLayoutBinding.descriptorCount = 1;
554		- uboLayoutBinding.stageFlags = vk::ShaderStageFlagBits::eVertex;
	664	+ std::array<vk::DescriptorSetLayoutBinding, 2> bindings;
	665	+ {
	666	+ vk::DescriptorSetLayoutBinding uboLayoutBinding = {};
	667	+ uboLayoutBinding.binding = 0;
	668	+ uboLayoutBinding.descriptorType = vk::DescriptorType::eUniformBuffer;
	669	+ uboLayoutBinding.descriptorCount = 1;
	670	+ uboLayoutBinding.stageFlags = vk::ShaderStageFlagBits::eVertex;
	671	+ bindings[0] = uboLayoutBinding;
	672	+ }
	673	+ {
	674	+ vk::DescriptorSetLayoutBinding uboLayoutBinding = {};
	675	+ uboLayoutBinding.binding = 1;
	676	+ uboLayoutBinding.descriptorType = vk::DescriptorType::eCombinedImageSampler;
	677	+ uboLayoutBinding.descriptorCount = 1;
	678	+ uboLayoutBinding.stageFlags = vk::ShaderStageFlagBits::eFragment;
	679	+ bindings[1] = uboLayoutBinding;
	680	+ }
555	681
556	682	vk::DescriptorSetLayoutCreateInfo layoutInfo = {};
557		- layoutInfo.bindingCount = 1;
558		- layoutInfo.pBindings = &uboLayoutBinding;
	683	+ layoutInfo.bindingCount = static_cast<uint32_t>(bindings.size());
	684	+ layoutInfo.pBindings = bindings.data();
559	685
560	686	descriptorSetLayout = device.createDescriptorSetLayout(layoutInfo);
561	687	#pragma endregion
		@@ -674,6 +800,67 @@
674	800	cmdPool = device.createCommandPool(poolInfo);
675	801	#pragma endregion
676	802
	803	+#pragma region textureImage
	804	+ {
	805	+ int texWidth, texHeight, texChan;
	806	+ stbi_uc *pixels = stbi_load("ass/texture/techsuwa.png", &texWidth, &texHeight, &texChan, STBI_rgb_alpha);
	807	+ vk::DeviceSize imgSize = texWidth * texHeight * 4;
	808	+ vk::MemoryPropertyFlags flags = vk::MemoryPropertyFlagBits::eHostVisible \| vk::MemoryPropertyFlagBits::eHostCoherent;
	809	+
	810	+ if (!pixels) {
	811	+ assert(false && "テキスチャーの読み込みに失敗。");
	812	+ return -1;
	813	+ }
	814	+
	815	+ auto [stagingBuf, stagingBufMem] = createBuffer(imgSize, vk::BufferUsageFlagBits::eTransferSrc, flags);
	816	+
	817	+ void *dataStaging = device.mapMemory(stagingBufMem, 0, imgSize);
	818	+ memcpy(dataStaging, pixels, imgSize);
	819	+ device.unmapMemory(stagingBufMem);
	820	+
	821	+ stbi_image_free(pixels);
	822	+
	823	+ vk::Format fmt = vk::Format::eR8G8B8A8Srgb;
	824	+ vk::ImageTiling tile = vk::ImageTiling::eOptimal;
	825	+ vk::ImageUsageFlags usa = vk::ImageUsageFlagBits::eTransferDst \| vk::ImageUsageFlagBits::eSampled;
	826	+ vk::MemoryPropertyFlags prop = vk::MemoryPropertyFlagBits::eDeviceLocal;
	827	+ std::tie(texImg, texImgMem) = createImage(texWidth, texHeight, fmt, tile, usa, prop);
	828	+
	829	+ vk::CommandBuffer commandBuf = beginSingleTimeCommands();
	830	+ transitionImageLayout(commandBuf, texImg, vk::ImageLayout::eUndefined, vk::ImageLayout::eTransferDstOptimal);
	831	+ copyBufferToImage(commandBuf, stagingBuf, texImg, static_cast<uint32_t>(texWidth), static_cast<uint32_t>(texHeight));
	832	+ transitionImageLayout(commandBuf, texImg, vk::ImageLayout::eTransferDstOptimal, vk::ImageLayout::eShaderReadOnlyOptimal);
	833	+ endSingleTimeCommands(std::move(commandBuf));
	834	+ if (stagingBuf) device.destroyBuffer(stagingBuf);
	835	+ if (stagingBufMem) device.freeMemory(stagingBufMem);
	836	+ }
	837	+
	838	+ createTextureImageView();
	839	+
	840	+ {
	841	+ vk::PhysicalDeviceProperties props = physicalDevice.getProperties();
	842	+ vk::SamplerCreateInfo samplerInfo = {};
	843	+ samplerInfo.magFilter = vk::Filter::eLinear;
	844	+ samplerInfo.minFilter = vk::Filter::eLinear;
	845	+ samplerInfo.mipmapMode = vk::SamplerMipmapMode::eLinear;
	846	+ samplerInfo.addressModeU = vk::SamplerAddressMode::eRepeat;
	847	+ samplerInfo.addressModeV = vk::SamplerAddressMode::eRepeat;
	848	+ samplerInfo.addressModeW = vk::SamplerAddressMode::eRepeat;
	849	+ samplerInfo.anisotropyEnable = vk::True;
	850	+ samplerInfo.maxAnisotropy = props.limits.maxSamplerAnisotropy;
	851	+ samplerInfo.compareEnable = vk::False;
	852	+ samplerInfo.compareOp = vk::CompareOp::eAlways;
	853	+ samplerInfo.borderColor = vk::BorderColor::eIntOpaqueBlack;
	854	+ samplerInfo.unnormalizedCoordinates = vk::False;
	855	+ samplerInfo.mipmapMode = vk::SamplerMipmapMode::eLinear;
	856	+ samplerInfo.mipLodBias = 0.f;
	857	+ samplerInfo.minLod = 0.f;
	858	+ samplerInfo.maxLod = 0.f;
	859	+
	860	+ texSampler = device.createSampler(samplerInfo);
	861	+ }
	862	+#pragma endregion
	863	+
677	864	#pragma region vertexBuffer
678	865	{
679	866	vk::DeviceSize bufSize = sizeof(vertices[0]) * vertices.size();
		@@ -720,21 +907,31 @@
720	907	#pragma endregion
721	908
722	909	#pragma region descriptorPool
723		- vk::DescriptorPoolSize descPoolSize = {};
724		- descPoolSize.type = vk::DescriptorType::eUniformBuffer;
725		- descPoolSize.descriptorCount = MAX_FRAMES_IN_FLIGHT;
	910	+ std::array<vk::DescriptorPoolSize, 2> descPoolSize;
	911	+ {
	912	+ vk::DescriptorPoolSize ps = {};
	913	+ ps.type = vk::DescriptorType::eUniformBuffer;
	914	+ ps.descriptorCount = MAX_FRAMES_IN_FLIGHT;
	915	+ descPoolSize[0] = ps;
	916	+ }
	917	+ {
	918	+ vk::DescriptorPoolSize ps = {};
	919	+ ps.type = vk::DescriptorType::eCombinedImageSampler;
	920	+ ps.descriptorCount = MAX_FRAMES_IN_FLIGHT;
	921	+ descPoolSize[1] = ps;
	922	+ }
726	923
727	924	vk::DescriptorPoolCreateInfo descPoolInfo = {};
728	925	descPoolInfo.flags = vk::DescriptorPoolCreateFlagBits::eFreeDescriptorSet;
729	926	descPoolInfo.maxSets = MAX_FRAMES_IN_FLIGHT;
730		- descPoolInfo.poolSizeCount = 1;
731		- descPoolInfo.pPoolSizes = &descPoolSize;
	927	+ descPoolInfo.poolSizeCount = static_cast<uint32_t>(descPoolSize.size());
	928	+ descPoolInfo.pPoolSizes = descPoolSize.data();
732	929
733	930	descriptorPool = device.createDescriptorPool(descPoolInfo);
734	931	#pragma endregion
735	932
736	933	#pragma region descriptorSets
737		- std::vector<vk::DescriptorSetLayout> layouts{MAX_FRAMES_IN_FLIGHT, descriptorSetLayout};
	934	+ std::vector<vk::DescriptorSetLayout> layouts{ MAX_FRAMES_IN_FLIGHT, descriptorSetLayout };
738	935	vk::DescriptorSetAllocateInfo descAllocInfo = {};
739	936	descAllocInfo.descriptorPool = descriptorPool;
740	937	descAllocInfo.descriptorSetCount = static_cast<uint32_t>(layouts.size());
		@@ -748,15 +945,34 @@
748	945	descBufInfo.offset = 0;
749	946	descBufInfo.range = sizeof(UniformBufferObject);
750	947
751		- vk::WriteDescriptorSet descWrite = {};
752		- descWrite.dstSet = descriptorSets[i];
753		- descWrite.dstBinding = 0;
754		- descWrite.dstArrayElement = 0;
755		- descWrite.descriptorCount = 1;
756		- descWrite.descriptorType = vk::DescriptorType::eUniformBuffer;
757		- descWrite.pBufferInfo = &descBufInfo;
	948	+ vk::DescriptorImageInfo imgInfo = {};
	949	+ imgInfo.sampler = texSampler;
	950	+ imgInfo.imageView = texImgView;
	951	+ imgInfo.imageLayout = vk::ImageLayout::eShaderReadOnlyOptimal;
758	952
759		- device.updateDescriptorSets(descWrite, {});
	953	+ std::array<vk::WriteDescriptorSet, 2> descWrites;
	954	+ {
	955	+ vk::WriteDescriptorSet descWrite = {};
	956	+ descWrite.dstSet = descriptorSets[i];
	957	+ descWrite.dstBinding = 0;
	958	+ descWrite.dstArrayElement = 0;
	959	+ descWrite.descriptorCount = 1;
	960	+ descWrite.descriptorType = vk::DescriptorType::eUniformBuffer;
	961	+ descWrite.pBufferInfo = &descBufInfo;
	962	+ descWrites[0] = descWrite;
	963	+ }
	964	+ {
	965	+ vk::WriteDescriptorSet descWrite = {};
	966	+ descWrite.dstSet = descriptorSets[i];
	967	+ descWrite.dstBinding = 1;
	968	+ descWrite.dstArrayElement = 0;
	969	+ descWrite.descriptorCount = 1;
	970	+ descWrite.descriptorType = vk::DescriptorType::eCombinedImageSampler;
	971	+ descWrite.pImageInfo = &imgInfo;
	972	+ descWrites[1] = descWrite;
	973	+ }
	974	+
	975	+ device.updateDescriptorSets(descWrites, {});
760	976	}
761	977	#pragma endregion
762	978
		@@ -882,6 +1098,10 @@
882	1098	if (vertBufMem) device.freeMemory(vertBufMem);
883	1099	for (const auto &it : uniformBufs) device.destroyBuffer(it);
884	1100	for (const auto &it : uniformBufsMem) device.freeMemory(it);
	1101	+ if (texSampler) device.destroySampler(texSampler);
	1102	+ if (texImgView) device.destroyImageView(texImgView);
	1103	+ if (texImg) device.destroyImage(texImg);
	1104	+ if (texImgMem) device.freeMemory(texImgMem);
885	1105	if (gfxPipeline) device.destroyPipeline(gfxPipeline);
886	1106	if (pipelineLayout) device.destroyPipelineLayout(pipelineLayout);
887	1107	shader.Finalize();

変更 VulkanExample/shader.frag

		@@ -1,8 +1,13 @@
1	1	#version 450
2	2
	3	+layout(binding = 1) uniform sampler2D texSampler;
	4	+
3	5	layout(location = 0) in vec3 fragColor;
	6	+layout(location = 1) in vec2 fragTexCoord;
	7	+
4	8	layout(location = 0) out vec4 outColor;
5	9
6	10	void main() {
7		- outColor = vec4(fragColor, 1.0);
	11	+ //outColor = vec4(fragTexCoord, 0.0, 1.0);
	12	+ outColor = texture(texSampler, fragTexCoord);
8	13	}

変更 VulkanExample/shader.slang

		@@ -1,6 +1,7 @@
1	1	struct VertexInput {
2	2	float2 positions;
3	3	float3 colors;
	4	+ float2 texCoord;
4	5	};
5	6
6	7	struct UniformBuffer {
		@@ -13,6 +14,7 @@
13	14	struct VertexOutput {
14	15	float4 pos: SV_Position;
15	16	float3 color;
	17	+ float2 texCoord;
16	18	};
17	19
18	20	[shader("vertex")]
		@@ -20,11 +22,15 @@
20	22	VertexOutput outVert;
21	23	outVert.pos = mul(ubo.proj, mul(ubo.view, mul(ubo.model, float4(inVert.positions, 0.0, 1.0))));
22	24	outVert.color = inVert.colors;
	25	+ outVert.texCoord = inVert.texCoord;
23	26	return outVert;
24	27	}
25	28
	29	+Sampler2D texture;
	30	+
26	31	[shader("fragment")]
27	32	float4 fragMain(VertexOutput inVert) : SV_Target {
28		- float3 color = inVert.color;
29		- return float4(color, 1.0);
	33	+ //return float4(inVert.texCoord, 0.0, 1.0);
	34	+ //return float4(inVert.color * texture.Sample(inVert.texCoord).rgb, 1.0);
	35	+ return texture.Sample(inVert.texCoord);
30	36	}

変更 VulkanExample/shader.vert

		@@ -8,10 +8,13 @@
8	8
9	9	layout(location = 0) in vec2 pos;
10	10	layout(location = 1) in vec3 col;
	11	+layout(location = 2) in vec2 texCoord;
11	12
12	13	layout(location = 0) out vec3 fragColor;
	14	+layout(location = 1) out vec2 fragTexCoord;
13	15
14	16	void main() {
15	17	gl_Position = ubo.proj * ubo.view * ubo.model * vec4(pos, 0.0, 1.0);
16	18	fragColor = col;
	19	+ fragTexCoord = texCoord;
17	20	}

変更 VulkanExample/shader/glsl.hh

		@@ -25,6 +25,6 @@
25	25	vk::PipelineVertexInputStateCreateInfo m_VertInput = {};
26	26
27	27	vk::VertexInputBindingDescription m_BindingDescription{};
28		- std::array<vk::VertexInputAttributeDescription, 2> m_AttributeDescriptions{};
	28	+ std::array<vk::VertexInputAttributeDescription, 3> m_AttributeDescriptions{};
29	29	}; // Shaders
30	30	#endif // USING_GLSL

変更 VulkanExample/shader/slang.hh

		@@ -24,6 +24,6 @@
24	24	vk::PipelineVertexInputStateCreateInfo m_VertInput = {};
25	25
26	26	vk::VertexInputBindingDescription m_BindingDescription{};
27		- std::array<vk::VertexInputAttributeDescription, 2> m_AttributeDescriptions{};
	27	+ std::array<vk::VertexInputAttributeDescription, 3> m_AttributeDescriptions{};
28	28	}; // Shaders
29	29	#endif // USING_SLANG

変更 VulkanExample/util/root.hh

		@@ -30,6 +30,7 @@
30	30	struct Vertex {
31	31	glm::vec2 pos;
32	32	glm::vec3 col;
	33	+ glm::vec2 texCoord;
33	34
34	35	static vk::VertexInputBindingDescription getBindingDescription() {
35	36	vk::VertexInputBindingDescription desc;
		@@ -39,8 +40,8 @@
39	40	return desc;
40	41	}
41	42
42		- static std::array<vk::VertexInputAttributeDescription, 2> getAttributeDescriptions() {
43		- std::array<vk::VertexInputAttributeDescription, 2> descs;
	43	+ static std::array<vk::VertexInputAttributeDescription, 3> getAttributeDescriptions() {
	44	+ std::array<vk::VertexInputAttributeDescription, 3> descs;
44	45	{
45	46	vk::VertexInputAttributeDescription desc;
46	47	desc.location = 0;
		@@ -57,16 +58,24 @@
57	58	desc.offset = offsetof(Vertex, col);
58	59	descs[1] = desc;
59	60	}
	61	+ {
	62	+ vk::VertexInputAttributeDescription desc;
	63	+ desc.location = 2;
	64	+ desc.binding = 0;
	65	+ desc.format = vk::Format::eR32G32Sfloat;
	66	+ desc.offset = offsetof(Vertex, texCoord);
	67	+ descs[2] = desc;
	68	+ }
60	69
61	70	return descs;
62	71	}
63	72	};
64	73
65	74	inline const std::vector<Vertex> vertices = {
66		- {{ -0.5f, -0.5f }, { 1.f, 0.f, 0.f }},
67		- {{ 0.5f, -0.5f }, { 0.f, 1.f, 0.f }},
68		- {{ 0.5f, 0.5f }, { 0.f, 0.f, 1.f }},
69		- {{ -0.5f, 0.5f }, { 1.f, 1.f, 0.f }},
	75	+ {{ -0.5f, -0.5f }, { 1.f, 0.f, 0.f }, { 1.f, 0.f }},
	76	+ {{ 0.5f, -0.5f }, { 0.f, 1.f, 0.f }, { 0.f, 0.f }},
	77	+ {{ 0.5f, 0.5f }, { 0.f, 0.f, 1.f }, { 0.f, 1.f }},
	78	+ {{ -0.5f, 0.5f }, { 1.f, 1.f, 0.f }, { 1.f, 1.f }},
70	79	};
71	80
72	81	inline const std::vector<uint16_t> indices = {
		@@ -75,7 +84,7 @@
75	84	};
76	85
77	86	struct UniformBufferObject {
78		- glm::mat4 model;
79		- glm::mat4 view;
80		- glm::mat4 proj;
	87	+ alignas(16) glm::mat4 model;
	88	+ alignas(16) glm::mat4 view;
	89	+ alignas(16) glm::mat4 proj;
81	90	};

追加 ass/texture/techsuwa.png

バイナリファイル

追加 dep/include/stb_image.hh

長いので途中までです

		@@ -0,0 +1,7988 @@
	1	+/* stb_image - v2.30 - public domain image loader - http://nothings.org/stb
	2	+ no warranty implied; use at your own risk
	3	+
	4	+ Do this:
	5	+ #define STB_IMAGE_IMPLEMENTATION
	6	+ before you include this file in one C or C++ file to create the implementation.
	7	+
	8	+ // i.e. it should look like this:
	9	+ #include ...
	10	+ #include ...
	11	+ #include ...
	12	+ #define STB_IMAGE_IMPLEMENTATION
	13	+ #include "stb_image.h"
	14	+
	15	+ You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
	16	+ And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
	17	+
	18	+
	19	+ QUICK NOTES:
	20	+ Primarily of interest to game developers and other people who can
	21	+ avoid problematic images and only need the trivial interface
	22	+
	23	+ JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
	24	+ PNG 1/2/4/8/16-bit-per-channel
	25	+
	26	+ TGA (not sure what subset, if a subset)
	27	+ BMP non-1bpp, non-RLE
	28	+ PSD (composited view only, no extra channels, 8/16 bit-per-channel)
	29	+
	30	+ GIF (*comp always reports as 4-channel)
	31	+ HDR (radiance rgbE format)
	32	+ PIC (Softimage PIC)
	33	+ PNM (PPM and PGM binary only)
	34	+
	35	+ Animated GIF still needs a proper API, but here's one way to do it:
	36	+ http://gist.github.com/urraka/685d9a6340b26b830d49
	37	+
	38	+ - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
	39	+ - decode from arbitrary I/O callbacks
	40	+ - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
	41	+
	42	+ Full documentation under "DOCUMENTATION" below.
	43	+
	44	+
	45	+LICENSE
	46	+
	47	+ See end of file for license information.
	48	+
	49	+RECENT REVISION HISTORY:
	50	+
	51	+ 2.30 (2024-05-31) avoid erroneous gcc warning
	52	+ 2.29 (2023-05-xx) optimizations
	53	+ 2.28 (2023-01-29) many error fixes, security errors, just tons of stuff
	54	+ 2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
	55	+ 2.26 (2020-07-13) many minor fixes
	56	+ 2.25 (2020-02-02) fix warnings
	57	+ 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically
	58	+ 2.23 (2019-08-11) fix clang static analysis warning
	59	+ 2.22 (2019-03-04) gif fixes, fix warnings
	60	+ 2.21 (2019-02-25) fix typo in comment
	61	+ 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
	62	+ 2.19 (2018-02-11) fix warning
	63	+ 2.18 (2018-01-30) fix warnings
	64	+ 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
	65	+ 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes
	66	+ 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC
	67	+ 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
	68	+ 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes
	69	+ 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
	70	+ 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64
	71	+ RGB-format JPEG; remove white matting in PSD;
	72	+ allocate large structures on the stack;
	73	+ correct channel count for PNG & BMP
	74	+ 2.10 (2016-01-22) avoid warning introduced in 2.09
	75	+ 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
	76	+
	77	+ See end of file for full revision history.
	78	+
	79	+
	80	+ ============================ Contributors =========================
	81	+
	82	+ Image formats Extensions, features
	83	+ Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info)
	84	+ Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info)
	85	+ Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG)
	86	+ Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks)
	87	+ Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG)
	88	+ Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip)
	89	+ Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD)
	90	+ github:urraka (animated gif) Junggon Kim (PNM comments)
	91	+ Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA)
	92	+ socks-the-fox (16-bit PNG)
	93	+ Jeremy Sawicki (handle all ImageNet JPGs)
	94	+ Optimizations & bugfixes Mikhail Morozov (1-bit BMP)
	95	+ Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query)
	96	+ Arseny Kapoulkine Simon Breuss (16-bit PNM)
	97	+ John-Mark Allen
	98	+ Carmelo J Fdez-Aguera
	99	+
	100	+ Bug & warning fixes
	101	+ Marc LeBlanc David Woo Guillaume George Martins Mozeiko
	102	+ Christpher Lloyd Jerry Jansson Joseph Thomson Blazej Dariusz Roszkowski
	103	+ Phil Jordan Dave Moore Roy Eltham
	104	+ Hayaki Saito Nathan Reed Won Chun
	105	+ Luke Graham Johan Duparc Nick Verigakis the Horde3D community
	106	+ Thomas Ruf Ronny Chevalier github:rlyeh
	107	+ Janez Zemva John Bartholomew Michal Cichon github:romigrou
	108	+ Jonathan Blow Ken Hamada Tero Hanninen github:svdijk
	109	+ Eugene Golushkov Laurent Gomila Cort Stratton github:snagar
	110	+ Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex
	111	+ Cass Everitt Ryamond Barbiero github:grim210
	112	+ Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw
	113	+ Philipp Wiesemann Dale Weiler Oriol Ferrer Mesia github:phprus
	114	+ Josh Tobin Neil Bickford Matthew Gregan github:poppolopoppo
	115	+ Julian Raschke Gregory Mullen Christian Floisand github:darealshinji
	116	+ Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007
	117	+ Brad Weinberger Matvey Cherevko github:mosra
	118	+ Luca Sas Alexander Veselov Zack Middleton [reserved]
	119	+ Ryan C. Gordon [reserved] [reserved]
	120	+ DO NOT ADD YOUR NAME HERE
	121	+
	122	+ Jacko Dirks
	123	+
	124	+ To add your name to the credits, pick a random blank space in the middle and fill it.
	125	+ 80% of merge conflicts on stb PRs are due to people adding their name at the end
	126	+ of the credits.
	127	+*/
	128	+
	129	+#ifndef STBI_INCLUDE_STB_IMAGE_H
	130	+#define STBI_INCLUDE_STB_IMAGE_H
	131	+
	132	+// DOCUMENTATION
	133	+//
	134	+// Limitations:
	135	+// - no 12-bit-per-channel JPEG
	136	+// - no JPEGs with arithmetic coding
	137	+// - GIF always returns *comp=4
	138	+//
	139	+// Basic usage (see HDR discussion below for HDR usage):
	140	+// int x,y,n;
	141	+// unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
	142	+// // ... process data if not NULL ...
	143	+// // ... x = width, y = height, n = # 8-bit components per pixel ...
	144	+// // ... replace '0' with '1'..'4' to force that many components per pixel
	145	+// // ... but 'n' will always be the number that it would have been if you said 0
	146	+// stbi_image_free(data);
	147	+//
	148	+// Standard parameters:
	149	+// int *x -- outputs image width in pixels
	150	+// int *y -- outputs image height in pixels
	151	+// int *channels_in_file -- outputs # of image components in image file
	152	+// int desired_channels -- if non-zero, # of image components requested in result
	153	+//
	154	+// The return value from an image loader is an 'unsigned char *' which points
	155	+// to the pixel data, or NULL on an allocation failure or if the image is
	156	+// corrupt or invalid. The pixel data consists of y scanlines of x pixels,
	157	+// with each pixel consisting of N interleaved 8-bit components; the first
	158	+// pixel pointed to is top-left-most in the image. There is no padding between
	159	+// image scanlines or between pixels, regardless of format. The number of
	160	+// components N is 'desired_channels' if desired_channels is non-zero, or
	161	+// *channels_in_file otherwise. If desired_channels is non-zero,
	162	+// *channels_in_file has the number of components that _would_ have been
	163	+// output otherwise. E.g. if you set desired_channels to 4, you will always
	164	+// get RGBA output, but you can check *channels_in_file to see if it's trivially
	165	+// opaque because e.g. there were only 3 channels in the source image.
	166	+//
	167	+// An output image with N components has the following components interleaved
	168	+// in this order in each pixel:
	169	+//
	170	+// N=#comp components
	171	+// 1 grey
	172	+// 2 grey, alpha
	173	+// 3 red, green, blue
	174	+// 4 red, green, blue, alpha
	175	+//
	176	+// If image loading fails for any reason, the return value will be NULL,
	177	+// and x, y, *channels_in_file will be unchanged. The function
	178	+// stbi_failure_reason() can be queried for an extremely brief, end-user
	179	+// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
	180	+// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
	181	+// more user-friendly ones.
	182	+//
	183	+// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
	184	+//
	185	+// To query the width, height and component count of an image without having to
	186	+// decode the full file, you can use the stbi_info family of functions:
	187	+//
	188	+// int x,y,n,ok;
	189	+// ok = stbi_info(filename, &x, &y, &n);
	190	+// // returns ok=1 and sets x, y, n if image is a supported format,
	191	+// // 0 otherwise.
	192	+//
	193	+// Note that stb_image pervasively uses ints in its public API for sizes,
	194	+// including sizes of memory buffers. This is now part of the API and thus
	195	+// hard to change without causing breakage. As a result, the various image
	196	+// loaders all have certain limits on image size; these differ somewhat
	197	+// by format but generally boil down to either just under 2GB or just under
	198	+// 1GB. When the decoded image would be larger than this, stb_image decoding
	199	+// will fail.
	200	+//
	201	+// Additionally, stb_image will reject image files that have any of their
	202	+// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS,
	203	+// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit,
	204	+// the only way to have an image with such dimensions load correctly
	205	+// is for it to have a rather extreme aspect ratio. Either way, the
	206	+// assumption here is that such larger images are likely to be malformed
	207	+// or malicious. If you do need to load an image with individual dimensions
	208	+// larger than that, and it still fits in the overall size limit, you can
	209	+// #define STBI_MAX_DIMENSIONS on your own to be something larger.
	210	+//
	211	+// ===========================================================================
	212	+//
	213	+// UNICODE:
	214	+//
	215	+// If compiling for Windows and you wish to use Unicode filenames, compile
	216	+// with
	217	+// #define STBI_WINDOWS_UTF8
	218	+// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
	219	+// Windows wchar_t filenames to utf8.
	220	+//
	221	+// ===========================================================================
	222	+//
	223	+// Philosophy
	224	+//
	225	+// stb libraries are designed with the following priorities:
	226	+//
	227	+// 1. easy to use
	228	+// 2. easy to maintain
	229	+// 3. good performance
	230	+//
	231	+// Sometimes I let "good performance" creep up in priority over "easy to maintain",
	232	+// and for best performance I may provide less-easy-to-use APIs that give higher
	233	+// performance, in addition to the easy-to-use ones. Nevertheless, it's important
	234	+// to keep in mind that from the standpoint of you, a client of this library,
	235	+// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all.
	236	+//
	237	+// Some secondary priorities arise directly from the first two, some of which
	238	+// provide more explicit reasons why performance can't be emphasized.
	239	+//
	240	+// - Portable ("ease of use")
	241	+// - Small source code footprint ("easy to maintain")
	242	+// - No dependencies ("ease of use")
	243	+//
	244	+// ===========================================================================
	245	+//
	246	+// I/O callbacks
	247	+//
	248	+// I/O callbacks allow you to read from arbitrary sources, like packaged
	249	+// files or some other source. Data read from callbacks are processed
	250	+// through a small internal buffer (currently 128 bytes) to try to reduce
	251	+// overhead.
	252	+//
	253	+// The three functions you must define are "read" (reads some bytes of data),
	254	+// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
	255	+//
	256	+// ===========================================================================
	257	+//
	258	+// SIMD support
	259	+//
	260	+// The JPEG decoder will try to automatically use SIMD kernels on x86 when
	261	+// supported by the compiler. For ARM Neon support, you must explicitly
	262	+// request it.
	263	+//
	264	+// (The old do-it-yourself SIMD API is no longer supported in the current
	265	+// code.)
	266	+//
	267	+// On x86, SSE2 will automatically be used when available based on a run-time
	268	+// test; if not, the generic C versions are used as a fall-back. On ARM targets,
	269	+// the typical path is to have separate builds for NEON and non-NEON devices
	270	+// (at least this is true for iOS and Android). Therefore, the NEON support is
	271	+// toggled by a build flag: define STBI_NEON to get NEON loops.
	272	+//
	273	+// If for some reason you do not want to use any of SIMD code, or if
	274	+// you have issues compiling it, you can disable it entirely by
	275	+// defining STBI_NO_SIMD.
	276	+//
	277	+// ===========================================================================
	278	+//
	279	+// HDR image support (disable by defining STBI_NO_HDR)
	280	+//
	281	+// stb_image supports loading HDR images in general, and currently the Radiance
	282	+// .HDR file format specifically. You can still load any file through the existing
	283	+// interface; if you attempt to load an HDR file, it will be automatically remapped
	284	+// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
	285	+// both of these constants can be reconfigured through this interface:
	286	+//
	287	+// stbi_hdr_to_ldr_gamma(2.2f);
	288	+// stbi_hdr_to_ldr_scale(1.0f);
	289	+//
	290	+// (note, do not use _inverse_ constants; stbi_image will invert them
	291	+// appropriately).
	292	+//
	293	+// Additionally, there is a new, parallel interface for loading files as
	294	+// (linear) floats to preserve the full dynamic range:
	295	+//
	296	+// float *data = stbi_loadf(filename, &x, &y, &n, 0);
	297	+//
	298	+// If you load LDR images through this interface, those images will
	299	+// be promoted to floating point values, run through the inverse of
	300	+// constants corresponding to the above:
	301	+//
	302	+// stbi_ldr_to_hdr_scale(1.0f);
	303	+// stbi_ldr_to_hdr_gamma(2.2f);
	304	+//
	305	+// Finally, given a filename (or an open file or memory block--see header
	306	+// file for details) containing image data, you can query for the "most
	307	+// appropriate" interface to use (that is, whether the image is HDR or
	308	+// not), using:
	309	+//
	310	+// stbi_is_hdr(char *filename);
	311	+//
	312	+// ===========================================================================
	313	+//
	314	+// iPhone PNG support:
	315	+//
	316	+// We optionally support converting iPhone-formatted PNGs (which store
	317	+// premultiplied BGRA) back to RGB, even though they're internally encoded
	318	+// differently. To enable this conversion, call
	319	+// stbi_convert_iphone_png_to_rgb(1).
	320	+//
	321	+// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
	322	+// pixel to remove any premultiplied alpha only if the image file explicitly
	323	+// says there's premultiplied data (currently only happens in iPhone images,
	324	+// and only if iPhone convert-to-rgb processing is on).
	325	+//
	326	+// ===========================================================================
	327	+//
	328	+// ADDITIONAL CONFIGURATION
	329	+//
	330	+// - You can suppress implementation of any of the decoders to reduce
	331	+// your code footprint by #defining one or more of the following
	332	+// symbols before creating the implementation.
	333	+//
	334	+// STBI_NO_JPEG
	335	+// STBI_NO_PNG
	336	+// STBI_NO_BMP
	337	+// STBI_NO_PSD
	338	+// STBI_NO_TGA
	339	+// STBI_NO_GIF
	340	+// STBI_NO_HDR
	341	+// STBI_NO_PIC
	342	+// STBI_NO_PNM (.ppm and .pgm)
	343	+//
	344	+// - You can request only certain decoders and suppress all other ones
	345	+// (this will be more forward-compatible, as addition of new decoders
	346	+// doesn't require you to disable them explicitly):
	347	+//
	348	+// STBI_ONLY_JPEG
	349	+// STBI_ONLY_PNG
	350	+// STBI_ONLY_BMP
	351	+// STBI_ONLY_PSD
	352	+// STBI_ONLY_TGA
	353	+// STBI_ONLY_GIF
	354	+// STBI_ONLY_HDR
	355	+// STBI_ONLY_PIC
	356	+// STBI_ONLY_PNM (.ppm and .pgm)
	357	+//
	358	+// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
	359	+// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
	360	+//
	361	+// - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater
	362	+// than that size (in either width or height) without further processing.
	363	+// This is to let programs in the wild set an upper bound to prevent
	364	+// denial-of-service attacks on untrusted data, as one could generate a
	365	+// valid image of gigantic dimensions and force stb_image to allocate a
	366	+// huge block of memory and spend disproportionate time decoding it. By
	367	+// default this is set to (1 << 24), which is 16777216, but that's still
	368	+// very big.
	369	+
	370	+#ifndef STBI_NO_STDIO
	371	+#include <stdio.h>
	372	+#endif // STBI_NO_STDIO
	373	+
	374	+#define STBI_VERSION 1
	375	+
	376	+enum
	377	+{
	378	+ STBI_default = 0, // only used for desired_channels
	379	+
	380	+ STBI_grey = 1,
	381	+ STBI_grey_alpha = 2,
	382	+ STBI_rgb = 3,
	383	+ STBI_rgb_alpha = 4
	384	+};
	385	+
	386	+#include <stdlib.h>
	387	+typedef unsigned char stbi_uc;
	388	+typedef unsigned short stbi_us;
	389	+
	390	+#ifdef __cplusplus
	391	+extern "C" {
	392	+#endif
	393	+
	394	+#ifndef STBIDEF
	395	+#ifdef STB_IMAGE_STATIC
	396	+#define STBIDEF static
	397	+#else
	398	+#define STBIDEF extern
	399	+#endif
	400	+#endif
	401	+
	402	+//////////////////////////////////////////////////////////////////////////////
	403	+//
	404	+// PRIMARY API - works on images of any type
	405	+//
	406	+
	407	+//
	408	+// load image by filename, open file, or memory buffer
	409	+//
	410	+
	411	+typedef struct
	412	+{
	413	+ int (read) (void user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read
	414	+ void (skip) (void user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
	415	+ int (eof) (void user); // returns nonzero if we are at end of file/data
	416	+} stbi_io_callbacks;
	417	+
	418	+////////////////////////////////////
	419	+//
	420	+// 8-bits-per-channel interface
	421	+//
	422	+
	423	+STBIDEF stbi_uc stbi_load_from_memory (stbi_uc const buffer, int len , int x, int y, int *channels_in_file, int desired_channels);
	424	+STBIDEF stbi_uc stbi_load_from_callbacks(stbi_io_callbacks const clbk , void user, int x, int y, int channels_in_file, int desired_channels);
	425	+
	426	+#ifndef STBI_NO_STDIO
	427	+STBIDEF stbi_uc stbi_load (char const filename, int x, int y, int *channels_in_file, int desired_channels);
	428	+STBIDEF stbi_uc stbi_load_from_file (FILE f, int x, int y, int *channels_in_file, int desired_channels);
	429	+// for stbi_load_from_file, file pointer is left pointing immediately after image
	430	+#endif
	431	+
	432	+#ifndef STBI_NO_GIF
	433	+STBIDEF stbi_uc stbi_load_gif_from_memory(stbi_uc const buffer, int len, int *delays, int x, int y, int z, int *comp, int req_comp);
	434	+#endif
	435	+
	436	+#ifdef STBI_WINDOWS_UTF8
	437	+STBIDEF int stbi_convert_wchar_to_utf8(char buffer, size_t bufferlen, const wchar_t input);
	438	+#endif
	439	+
	440	+////////////////////////////////////
	441	+//
	442	+// 16-bits-per-channel interface
	443	+//
	444	+
	445	+STBIDEF stbi_us stbi_load_16_from_memory (stbi_uc const buffer, int len, int x, int y, int *channels_in_file, int desired_channels);
	446	+STBIDEF stbi_us stbi_load_16_from_callbacks(stbi_io_callbacks const clbk, void user, int x, int y, int channels_in_file, int desired_channels);
	447	+
	448	+#ifndef STBI_NO_STDIO
	449	+STBIDEF stbi_us stbi_load_16 (char const filename, int x, int y, int *channels_in_file, int desired_channels);
	450	+STBIDEF stbi_us stbi_load_from_file_16(FILE f, int x, int y, int *channels_in_file, int desired_channels);
	451	+#endif
	452	+
	453	+////////////////////////////////////
	454	+//
	455	+// float-per-channel interface
	456	+//
	457	+#ifndef STBI_NO_LINEAR
	458	+ STBIDEF float stbi_loadf_from_memory (stbi_uc const buffer, int len, int x, int y, int *channels_in_file, int desired_channels);
	459	+ STBIDEF float stbi_loadf_from_callbacks (stbi_io_callbacks const clbk, void user, int x, int y, int channels_in_file, int desired_channels);
	460	+
	461	+ #ifndef STBI_NO_STDIO
	462	+ STBIDEF float stbi_loadf (char const filename, int x, int y, int *channels_in_file, int desired_channels);
	463	+ STBIDEF float stbi_loadf_from_file (FILE f, int x, int y, int *channels_in_file, int desired_channels);
	464	+ #endif
	465	+#endif
	466	+
	467	+#ifndef STBI_NO_HDR
	468	+ STBIDEF void stbi_hdr_to_ldr_gamma(float gamma);
	469	+ STBIDEF void stbi_hdr_to_ldr_scale(float scale);
	470	+#endif // STBI_NO_HDR
	471	+
	472	+#ifndef STBI_NO_LINEAR
	473	+ STBIDEF void stbi_ldr_to_hdr_gamma(float gamma);
	474	+ STBIDEF void stbi_ldr_to_hdr_scale(float scale);
	475	+#endif // STBI_NO_LINEAR
	476	+
	477	+// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
	478	+STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const clbk, void user);
	479	+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
	480	+#ifndef STBI_NO_STDIO
	481	+STBIDEF int stbi_is_hdr (char const *filename);
	482	+STBIDEF int stbi_is_hdr_from_file(FILE *f);
	483	+#endif // STBI_NO_STDIO
	484	+
	485	+
	486	+// get a VERY brief reason for failure
	487	+// on most compilers (and ALL modern mainstream compilers) this is threadsafe
	488	+STBIDEF const char *stbi_failure_reason (void);
	489	+
	490	+// free the loaded image -- this is just free()
	491	+STBIDEF void stbi_image_free (void *retval_from_stbi_load);
	492	+
	493	+// get image dimensions & components without fully decoding
	494	+STBIDEF int stbi_info_from_memory(stbi_uc const buffer, int len, int x, int y, int comp);
	495	+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const clbk, void user, int x, int y, int *comp);
	496	+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len);
	497	+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const clbk, void user);
	498	+
	499	+#ifndef STBI_NO_STDIO
	500	+STBIDEF int stbi_info (char const filename, int x, int y, int comp);
	501	+STBIDEF int stbi_info_from_file (FILE f, int x, int y, int comp);
	502	+STBIDEF int stbi_is_16_bit (char const *filename);
	503	+STBIDEF int stbi_is_16_bit_from_file(FILE *f);
	504	+#endif
	505	+
	506	+
	507	+
	508	+// for image formats that explicitly notate that they have premultiplied alpha,
	509	+// we just return the colors as stored in the file. set this flag to force
	510	+// unpremultiplication. results are undefined if the unpremultiply overflow.
	511	+STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
	512	+
	513	+// indicate whether we should process iphone images back to canonical format,
	514	+// or just pass them through "as-is"
	515	+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
	516	+
	517	+// flip the image vertically, so the first pixel in the output array is the bottom left
	518	+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
	519	+
	520	+// as above, but only applies to images loaded on the thread that calls the function
	521	+// this function is only available if your compiler supports thread-local variables;
	522	+// calling it will fail to link if your compiler doesn't
	523	+STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply);
	524	+STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert);
	525	+STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
	526	+
	527	+// ZLIB client - used by PNG, available for other purposes
	528	+
	529	+STBIDEF char stbi_zlib_decode_malloc_guesssize(const char buffer, int len, int initial_size, int *outlen);
	530	+STBIDEF char stbi_zlib_decode_malloc_guesssize_headerflag(const char buffer, int len, int initial_size, int *outlen, int parse_header);
	531	+STBIDEF char stbi_zlib_decode_malloc(const char buffer, int len, int *outlen);
	532	+STBIDEF int stbi_zlib_decode_buffer(char obuffer, int olen, const char ibuffer, int ilen);
	533	+
	534	+STBIDEF char stbi_zlib_decode_noheader_malloc(const char buffer, int len, int *outlen);
	535	+STBIDEF int stbi_zlib_decode_noheader_buffer(char obuffer, int olen, const char ibuffer, int ilen);
	536	+
	537	+
	538	+#ifdef __cplusplus
	539	+}
	540	+#endif
	541	+
	542	+//
	543	+//
	544	+//// end header file /////////////////////////////////////////////////////
	545	+#endif // STBI_INCLUDE_STB_IMAGE_H
	546	+
	547	+#ifdef STB_IMAGE_IMPLEMENTATION
	548	+
	549	+#if defined(STBI_ONLY_JPEG) \|\| defined(STBI_ONLY_PNG) \|\| defined(STBI_ONLY_BMP) \
	550	+ \|\| defined(STBI_ONLY_TGA) \|\| defined(STBI_ONLY_GIF) \|\| defined(STBI_ONLY_PSD) \
	551	+ \|\| defined(STBI_ONLY_HDR) \|\| defined(STBI_ONLY_PIC) \|\| defined(STBI_ONLY_PNM) \
	552	+ \|\| defined(STBI_ONLY_ZLIB)
	553	+ #ifndef STBI_ONLY_JPEG
	554	+ #define STBI_NO_JPEG
	555	+ #endif
	556	+ #ifndef STBI_ONLY_PNG
	557	+ #define STBI_NO_PNG
	558	+ #endif
	559	+ #ifndef STBI_ONLY_BMP
	560	+ #define STBI_NO_BMP
	561	+ #endif
	562	+ #ifndef STBI_ONLY_PSD
	563	+ #define STBI_NO_PSD
	564	+ #endif
	565	+ #ifndef STBI_ONLY_TGA
	566	+ #define STBI_NO_TGA
	567	+ #endif
	568	+ #ifndef STBI_ONLY_GIF
	569	+ #define STBI_NO_GIF
	570	+ #endif
	571	+ #ifndef STBI_ONLY_HDR
	572	+ #define STBI_NO_HDR
	573	+ #endif
	574	+ #ifndef STBI_ONLY_PIC
	575	+ #define STBI_NO_PIC
	576	+ #endif
	577	+ #ifndef STBI_ONLY_PNM
	578	+ #define STBI_NO_PNM
	579	+ #endif
	580	+#endif
	581	+
	582	+#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
	583	+#define STBI_NO_ZLIB
	584	+#endif
	585	+
	586	+
	587	+#include <stdarg.h>
	588	+#include <stddef.h> // ptrdiff_t on osx
	589	+#include <stdlib.h>
	590	+#include <string.h>
	591	+#include <limits.h>
	592	+
	593	+#if !defined(STBI_NO_LINEAR) \|\| !defined(STBI_NO_HDR)
	594	+#include <math.h> // ldexp, pow
	595	+#endif
	596	+
	597	+#ifndef STBI_NO_STDIO
	598	+#include <stdio.h>
	599	+#endif
	600	+
	601	+#ifndef STBI_ASSERT
	602	+#include <assert.h>
	603	+#define STBI_ASSERT(x) assert(x)
	604	+#endif
	605	+
	606	+#ifdef __cplusplus
	607	+#define STBI_EXTERN extern "C"
	608	+#else
	609	+#define STBI_EXTERN extern
	610	+#endif
	611	+
	612	+
	613	+#ifndef _MSC_VER
	614	+ #ifdef __cplusplus
	615	+ #define stbi_inline inline
	616	+ #else
	617	+ #define stbi_inline
	618	+ #endif
	619	+#else
	620	+ #define stbi_inline __forceinline
	621	+#endif
	622	+
	623	+#ifndef STBI_NO_THREAD_LOCALS
	624	+ #if defined(__cplusplus) && __cplusplus >= 201103L
	625	+ #define STBI_THREAD_LOCAL thread_local
	626	+ #elif defined(__GNUC__) && __GNUC__ < 5
	627	+ #define STBI_THREAD_LOCAL __thread
	628	+ #elif defined(_MSC_VER)
	629	+ #define STBI_THREAD_LOCAL __declspec(thread)
	630	+ #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
	631	+ #define STBI_THREAD_LOCAL _Thread_local
	632	+ #endif
	633	+
	634	+ #ifndef STBI_THREAD_LOCAL
	635	+ #if defined(__GNUC__)
	636	+ #define STBI_THREAD_LOCAL __thread
	637	+ #endif
	638	+ #endif
	639	+#endif
	640	+
	641	+#if defined(_MSC_VER) \|\| defined(__SYMBIAN32__)
	642	+typedef unsigned short stbi__uint16;
	643	+typedef signed short stbi__int16;
	644	+typedef unsigned int stbi__uint32;
	645	+typedef signed int stbi__int32;
	646	+#else
	647	+#include <stdint.h>
	648	+typedef uint16_t stbi__uint16;
	649	+typedef int16_t stbi__int16;
	650	+typedef uint32_t stbi__uint32;
	651	+typedef int32_t stbi__int32;
	652	+#endif
	653	+
	654	+// should produce compiler error if size is wrong
	655	+typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
	656	+
	657	+#ifdef _MSC_VER
	658	+#define STBI_NOTUSED(v) (void)(v)
	659	+#else
	660	+#define STBI_NOTUSED(v) (void)sizeof(v)
	661	+#endif
	662	+
	663	+#ifdef _MSC_VER
	664	+#define STBI_HAS_LROTL
	665	+#endif
	666	+
	667	+#ifdef STBI_HAS_LROTL
	668	+ #define stbi_lrot(x,y) _lrotl(x,y)
	669	+#else
	670	+ #define stbi_lrot(x,y) (((x) << (y)) \| ((x) >> (-(y) & 31)))
	671	+#endif
	672	+
	673	+#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) \|\| defined(STBI_REALLOC_SIZED))
	674	+// ok
	675	+#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
	676	+// ok
	677	+#else
	678	+#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
	679	+#endif
	680	+
	681	+#ifndef STBI_MALLOC
	682	+#define STBI_MALLOC(sz) malloc(sz)
	683	+#define STBI_REALLOC(p,newsz) realloc(p,newsz)
	684	+#define STBI_FREE(p) free(p)
	685	+#endif
	686	+
	687	+#ifndef STBI_REALLOC_SIZED
	688	+#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz)
	689	+#endif
	690	+
	691	+// x86/x64 detection
	692	+#if defined(__x86_64__) \|\| defined(_M_X64)
	693	+#define STBI__X64_TARGET
	694	+#elif defined(__i386) \|\| defined(_M_IX86)
	695	+#define STBI__X86_TARGET
	696	+#endif
	697	+
	698	+#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
	699	+// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
	700	+// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
	701	+// but previous attempts to provide the SSE2 functions with runtime
	702	+// detection caused numerous issues. The way architecture extensions are
	703	+// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
	704	+// New behavior: if compiled with -msse2, we use SSE2 without any
	705	+// detection; if not, we don't use it at all.
	706	+#define STBI_NO_SIMD
	707	+#endif
	708	+
	709	+#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
	710	+// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET
	711	+//
	712	+// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
	713	+// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
	714	+// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
	715	+// simultaneously enabling "-mstackrealign".
	716	+//
	717	+// See https://github.com/nothings/stb/issues/81 for more information.
	718	+//
	719	+// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
	720	+// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2.
	721	+#define STBI_NO_SIMD
	722	+#endif
	723	+
	724	+#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) \|\| defined(STBI__X64_TARGET))
	725	+#define STBI_SSE2
	726	+#include <emmintrin.h>
	727	+
	728	+#ifdef _MSC_VER
	729	+
	730	+#if _MSC_VER >= 1400 // not VC6
	731	+#include <intrin.h> // __cpuid
	732	+static int stbi__cpuid3(void)
	733	+{
	734	+ int info[4];
	735	+ __cpuid(info,1);
	736	+ return info[3];
	737	+}
	738	+#else
	739	+static int stbi__cpuid3(void)
	740	+{
	741	+ int res;
	742	+ __asm {
	743	+ mov eax,1
	744	+ cpuid
	745	+ mov res,edx
	746	+ }
	747	+ return res;
	748	+}
	749	+#endif
	750	+
	751	+#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
	752	+
	753	+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
	754	+static int stbi__sse2_available(void)
	755	+{
	756	+ int info3 = stbi__cpuid3();
	757	+ return ((info3 >> 26) & 1) != 0;
	758	+}
	759	+#endif
	760	+
	761	+#else // assume GCC-style if not VC++
	762	+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
	763	+
	764	+#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
	765	+static int stbi__sse2_available(void)
	766	+{
	767	+ // If we're even attempting to compile this on GCC/Clang, that means
	768	+ // -msse2 is on, which means the compiler is allowed to use SSE2
	769	+ // instructions at will, and so are we.
	770	+ return 1;
	771	+}
	772	+#endif
	773	+
	774	+#endif
	775	+#endif
	776	+
	777	+// ARM NEON
	778	+#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
	779	+#undef STBI_NEON
	780	+#endif
	781	+
	782	+#ifdef STBI_NEON
	783	+#include <arm_neon.h>
	784	+#ifdef _MSC_VER
	785	+#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
	786	+#else
	787	+#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
	788	+#endif
	789	+#endif
	790	+
	791	+#ifndef STBI_SIMD_ALIGN
	792	+#define STBI_SIMD_ALIGN(type, name) type name
	793	+#endif
	794	+
	795	+#ifndef STBI_MAX_DIMENSIONS
	796	+#define STBI_MAX_DIMENSIONS (1 << 24)
	797	+#endif
	798	+
	799	+///////////////////////////////////////////////
	800	+//
	801	+// stbi__context struct and start_xxx functions
	802	+
	803	+// stbi__context structure is our basic context used by all images, so it
	804	+// contains all the IO context, plus some basic image information
	805	+typedef struct
	806	+{
	807	+ stbi__uint32 img_x, img_y;
	808	+ int img_n, img_out_n;
	809	+
	810	+ stbi_io_callbacks io;
	811	+ void *io_user_data;
	812	+
	813	+ int read_from_callbacks;
	814	+ int buflen;
	815	+ stbi_uc buffer_start[128];
	816	+ int callback_already_read;
	817	+
	818	+ stbi_uc img_buffer, img_buffer_end;
	819	+ stbi_uc img_buffer_original, img_buffer_original_end;
	820	+} stbi__context;
	821	+
	822	+
	823	+static void stbi__refill_buffer(stbi__context *s);
	824	+
	825	+// initialize a memory-decode context
	826	+static void stbi__start_mem(stbi__context s, stbi_uc const buffer, int len)
	827	+{
	828	+ s->io.read = NULL;
	829	+ s->read_from_callbacks = 0;
	830	+ s->callback_already_read = 0;
	831	+ s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
	832	+ s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len;
	833	+}
	834	+
	835	+// initialize a callback-based context
	836	+static void stbi__start_callbacks(stbi__context s, stbi_io_callbacks c, void *user)
	837	+{
	838	+ s->io = *c;
	839	+ s->io_user_data = user;
	840	+ s->buflen = sizeof(s->buffer_start);
	841	+ s->read_from_callbacks = 1;
	842	+ s->callback_already_read = 0;
	843	+ s->img_buffer = s->img_buffer_original = s->buffer_start;
	844	+ stbi__refill_buffer(s);
	845	+ s->img_buffer_original_end = s->img_buffer_end;
	846	+}
	847	+
	848	+#ifndef STBI_NO_STDIO
	849	+
	850	+static int stbi__stdio_read(void user, char data, int size)
	851	+{
	852	+ return (int) fread(data,1,size,(FILE*) user);
	853	+}
	854	+
	855	+static void stbi__stdio_skip(void *user, int n)
	856	+{
	857	+ int ch;
	858	+ fseek((FILE*) user, n, SEEK_CUR);
	859	+ ch = fgetc((FILE) user); / have to read a byte to reset feof()'s flag */
	860	+ if (ch != EOF) {
	861	+ ungetc(ch, (FILE ) user); / push byte back onto stream if valid. */
	862	+ }
	863	+}
	864	+
	865	+static int stbi__stdio_eof(void *user)
	866	+{
	867	+ return feof((FILE) user) \|\| ferror((FILE ) user);
	868	+}
	869	+
	870	+static stbi_io_callbacks stbi__stdio_callbacks =
	871	+{
	872	+ stbi__stdio_read,
	873	+ stbi__stdio_skip,
	874	+ stbi__stdio_eof,
	875	+};
	876	+
	877	+static void stbi__start_file(stbi__context s, FILE f)
	878	+{
	879	+ stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
	880	+}
	881	+
	882	+//static void stop_file(stbi__context *s) { }
	883	+
	884	+#endif // !STBI_NO_STDIO
	885	+
	886	+static void stbi__rewind(stbi__context *s)
	887	+{
	888	+ // conceptually rewind SHOULD rewind to the beginning of the stream,
	889	+ // but we just rewind to the beginning of the initial buffer, because
	890	+ // we only use it after doing 'test', which only ever looks at at most 92 bytes
	891	+ s->img_buffer = s->img_buffer_original;
	892	+ s->img_buffer_end = s->img_buffer_original_end;
	893	+}
	894	+
	895	+enum
	896	+{
	897	+ STBI_ORDER_RGB,
	898	+ STBI_ORDER_BGR
	899	+};
	900	+
	901	+typedef struct
	902	+{
	903	+ int bits_per_channel;
	904	+ int num_channels;
	905	+ int channel_order;
	906	+} stbi__result_info;
	907	+
	908	+#ifndef STBI_NO_JPEG
	909	+static int stbi__jpeg_test(stbi__context *s);
	910	+static void stbi__jpeg_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	911	+static int stbi__jpeg_info(stbi__context s, int x, int y, int comp);
	912	+#endif
	913	+
	914	+#ifndef STBI_NO_PNG
	915	+static int stbi__png_test(stbi__context *s);
	916	+static void stbi__png_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	917	+static int stbi__png_info(stbi__context s, int x, int y, int comp);
	918	+static int stbi__png_is16(stbi__context *s);
	919	+#endif
	920	+
	921	+#ifndef STBI_NO_BMP
	922	+static int stbi__bmp_test(stbi__context *s);
	923	+static void stbi__bmp_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	924	+static int stbi__bmp_info(stbi__context s, int x, int y, int comp);
	925	+#endif
	926	+
	927	+#ifndef STBI_NO_TGA
	928	+static int stbi__tga_test(stbi__context *s);
	929	+static void stbi__tga_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	930	+static int stbi__tga_info(stbi__context s, int x, int y, int comp);
	931	+#endif
	932	+
	933	+#ifndef STBI_NO_PSD
	934	+static int stbi__psd_test(stbi__context *s);
	935	+static void stbi__psd_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri, int bpc);
	936	+static int stbi__psd_info(stbi__context s, int x, int y, int comp);
	937	+static int stbi__psd_is16(stbi__context *s);
	938	+#endif
	939	+
	940	+#ifndef STBI_NO_HDR
	941	+static int stbi__hdr_test(stbi__context *s);
	942	+static float stbi__hdr_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	943	+static int stbi__hdr_info(stbi__context s, int x, int y, int comp);
	944	+#endif
	945	+
	946	+#ifndef STBI_NO_PIC
	947	+static int stbi__pic_test(stbi__context *s);
	948	+static void stbi__pic_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	949	+static int stbi__pic_info(stbi__context s, int x, int y, int comp);
	950	+#endif
	951	+
	952	+#ifndef STBI_NO_GIF
	953	+static int stbi__gif_test(stbi__context *s);
	954	+static void stbi__gif_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	955	+static void stbi__load_gif_main(stbi__context s, int *delays, int x, int y, int z, int *comp, int req_comp);
	956	+static int stbi__gif_info(stbi__context s, int x, int y, int comp);
	957	+#endif
	958	+
	959	+#ifndef STBI_NO_PNM
	960	+static int stbi__pnm_test(stbi__context *s);
	961	+static void stbi__pnm_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri);
	962	+static int stbi__pnm_info(stbi__context s, int x, int y, int comp);
	963	+static int stbi__pnm_is16(stbi__context *s);
	964	+#endif
	965	+
	966	+static
	967	+#ifdef STBI_THREAD_LOCAL
	968	+STBI_THREAD_LOCAL
	969	+#endif
	970	+const char *stbi__g_failure_reason;
	971	+
	972	+STBIDEF const char *stbi_failure_reason(void)
	973	+{
	974	+ return stbi__g_failure_reason;
	975	+}
	976	+
	977	+#ifndef STBI_NO_FAILURE_STRINGS
	978	+static int stbi__err(const char *str)
	979	+{
	980	+ stbi__g_failure_reason = str;
	981	+ return 0;
	982	+}
	983	+#endif
	984	+
	985	+static void *stbi__malloc(size_t size)
	986	+{
	987	+ return STBI_MALLOC(size);
	988	+}
	989	+
	990	+// stb_image uses ints pervasively, including for offset calculations.
	991	+// therefore the largest decoded image size we can support with the
	992	+// current code, even on 64-bit targets, is INT_MAX. this is not a
	993	+// significant limitation for the intended use case.
	994	+//
	995	+// we do, however, need to make sure our size calculations don't
	996	+// overflow. hence a few helper functions for size calculations that
	997	+// multiply integers together, making sure that they're non-negative
	998	+// and no overflow occurs.
	999	+
	1000	+// return 1 if the sum is valid, 0 on overflow.
	1001	+// negative terms are considered invalid.
	1002	+static int stbi__addsizes_valid(int a, int b)
	1003	+{
	1004	+ if (b < 0) return 0;
	1005	+ // now 0 <= b <= INT_MAX, hence also
	1006	+ // 0 <= INT_MAX - b <= INTMAX.
	1007	+ // And "a + b <= INT_MAX" (which might overflow) is the
	1008	+ // same as a <= INT_MAX - b (no overflow)
	1009	+ return a <= INT_MAX - b;
	1010	+}
	1011	+
	1012	+// returns 1 if the product is valid, 0 on overflow.
	1013	+// negative factors are considered invalid.
	1014	+static int stbi__mul2sizes_valid(int a, int b)
	1015	+{
	1016	+ if (a < 0 \|\| b < 0) return 0;
	1017	+ if (b == 0) return 1; // mul-by-0 is always safe
	1018	+ // portable way to check for no overflows in a*b
	1019	+ return a <= INT_MAX/b;
	1020	+}
	1021	+
	1022	+#if !defined(STBI_NO_JPEG) \|\| !defined(STBI_NO_PNG) \|\| !defined(STBI_NO_TGA) \|\| !defined(STBI_NO_HDR)
	1023	+// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
	1024	+static int stbi__mad2sizes_valid(int a, int b, int add)
	1025	+{
	1026	+ return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
	1027	+}
	1028	+#endif
	1029	+
	1030	+// returns 1 if "abc + add" has no negative terms/factors and doesn't overflow
	1031	+static int stbi__mad3sizes_valid(int a, int b, int c, int add)
	1032	+{
	1033	+ return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
	1034	+ stbi__addsizes_valid(abc, add);
	1035	+}
	1036	+
	1037	+// returns 1 if "abc*d + add" has no negative terms/factors and doesn't overflow
	1038	+#if !defined(STBI_NO_LINEAR) \|\| !defined(STBI_NO_HDR) \|\| !defined(STBI_NO_PNM)
	1039	+static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
	1040	+{
	1041	+ return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
	1042	+ stbi__mul2sizes_valid(abc, d) && stbi__addsizes_valid(abc*d, add);
	1043	+}
	1044	+#endif
	1045	+
	1046	+#if !defined(STBI_NO_JPEG) \|\| !defined(STBI_NO_PNG) \|\| !defined(STBI_NO_TGA) \|\| !defined(STBI_NO_HDR)
	1047	+// mallocs with size overflow checking
	1048	+static void *stbi__malloc_mad2(int a, int b, int add)
	1049	+{
	1050	+ if (!stbi__mad2sizes_valid(a, b, add)) return NULL;
	1051	+ return stbi__malloc(a*b + add);
	1052	+}
	1053	+#endif
	1054	+
	1055	+static void *stbi__malloc_mad3(int a, int b, int c, int add)
	1056	+{
	1057	+ if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL;
	1058	+ return stbi__malloc(abc + add);
	1059	+}
	1060	+
	1061	+#if !defined(STBI_NO_LINEAR) \|\| !defined(STBI_NO_HDR) \|\| !defined(STBI_NO_PNM)
	1062	+static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
	1063	+{
	1064	+ if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
	1065	+ return stbi__malloc(abc*d + add);
	1066	+}
	1067	+#endif
	1068	+
	1069	+// returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow.
	1070	+static int stbi__addints_valid(int a, int b)
	1071	+{
	1072	+ if ((a >= 0) != (b >= 0)) return 1; // a and b have different signs, so no overflow
	1073	+ if (a < 0 && b < 0) return a >= INT_MIN - b; // same as a + b >= INT_MIN; INT_MIN - b cannot overflow since b < 0.
	1074	+ return a <= INT_MAX - b;
	1075	+}
	1076	+
	1077	+// returns 1 if the product of two ints fits in a signed short, 0 on overflow.
	1078	+static int stbi__mul2shorts_valid(int a, int b)
	1079	+{
	1080	+ if (b == 0 \|\| b == -1) return 1; // multiplication by 0 is always 0; check for -1 so SHRT_MIN/b doesn't overflow
	1081	+ if ((a >= 0) == (b >= 0)) return a <= SHRT_MAX/b; // product is positive, so similar to mul2sizes_valid
	1082	+ if (b < 0) return a <= SHRT_MIN / b; // same as a * b >= SHRT_MIN
	1083	+ return a >= SHRT_MIN / b;
	1084	+}
	1085	+
	1086	+// stbi__err - error
	1087	+// stbi__errpf - error returning pointer to float
	1088	+// stbi__errpuc - error returning pointer to unsigned char
	1089	+
	1090	+#ifdef STBI_NO_FAILURE_STRINGS
	1091	+ #define stbi__err(x,y) 0
	1092	+#elif defined(STBI_FAILURE_USERMSG)
	1093	+ #define stbi__err(x,y) stbi__err(y)
	1094	+#else
	1095	+ #define stbi__err(x,y) stbi__err(x)
	1096	+#endif
	1097	+
	1098	+#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL))
	1099	+#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL))
	1100	+
	1101	+STBIDEF void stbi_image_free(void *retval_from_stbi_load)
	1102	+{
	1103	+ STBI_FREE(retval_from_stbi_load);
	1104	+}
	1105	+
	1106	+#ifndef STBI_NO_LINEAR
	1107	+static float stbi__ldr_to_hdr(stbi_uc data, int x, int y, int comp);
	1108	+#endif
	1109	+
	1110	+#ifndef STBI_NO_HDR
	1111	+static stbi_uc stbi__hdr_to_ldr(float data, int x, int y, int comp);
	1112	+#endif
	1113	+
	1114	+static int stbi__vertically_flip_on_load_global = 0;
	1115	+
	1116	+STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
	1117	+{
	1118	+ stbi__vertically_flip_on_load_global = flag_true_if_should_flip;
	1119	+}
	1120	+
	1121	+#ifndef STBI_THREAD_LOCAL
	1122	+#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global
	1123	+#else
	1124	+static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set;
	1125	+
	1126	+STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip)
	1127	+{
	1128	+ stbi__vertically_flip_on_load_local = flag_true_if_should_flip;
	1129	+ stbi__vertically_flip_on_load_set = 1;
	1130	+}
	1131	+
	1132	+#define stbi__vertically_flip_on_load (stbi__vertically_flip_on_load_set \
	1133	+ ? stbi__vertically_flip_on_load_local \
	1134	+ : stbi__vertically_flip_on_load_global)
	1135	+#endif // STBI_THREAD_LOCAL
	1136	+
	1137	+static void stbi__load_main(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri, int bpc)
	1138	+{
	1139	+ memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields
	1140	+ ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed
	1141	+ ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
	1142	+ ri->num_channels = 0;
	1143	+
	1144	+ // test the formats with a very explicit header first (at least a FOURCC
	1145	+ // or distinctive magic number first)
	1146	+ #ifndef STBI_NO_PNG
	1147	+ if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri);
	1148	+ #endif
	1149	+ #ifndef STBI_NO_BMP
	1150	+ if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri);
	1151	+ #endif
	1152	+ #ifndef STBI_NO_GIF
	1153	+ if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri);
	1154	+ #endif
	1155	+ #ifndef STBI_NO_PSD
	1156	+ if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc);
	1157	+ #else
	1158	+ STBI_NOTUSED(bpc);
	1159	+ #endif
	1160	+ #ifndef STBI_NO_PIC
	1161	+ if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri);
	1162	+ #endif
	1163	+
	1164	+ // then the formats that can end up attempting to load with just 1 or 2
	1165	+ // bytes matching expectations; these are prone to false positives, so
	1166	+ // try them later
	1167	+ #ifndef STBI_NO_JPEG
	1168	+ if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
	1169	+ #endif
	1170	+ #ifndef STBI_NO_PNM
	1171	+ if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri);
	1172	+ #endif
	1173	+
	1174	+ #ifndef STBI_NO_HDR
	1175	+ if (stbi__hdr_test(s)) {
	1176	+ float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri);
	1177	+ return stbi__hdr_to_ldr(hdr, x, y, req_comp ? req_comp : *comp);
	1178	+ }
	1179	+ #endif
	1180	+
	1181	+ #ifndef STBI_NO_TGA
	1182	+ // test tga last because it's a crappy test!
	1183	+ if (stbi__tga_test(s))
	1184	+ return stbi__tga_load(s,x,y,comp,req_comp, ri);
	1185	+ #endif
	1186	+
	1187	+ return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
	1188	+}
	1189	+
	1190	+static stbi_uc stbi__convert_16_to_8(stbi__uint16 orig, int w, int h, int channels)
	1191	+{
	1192	+ int i;
	1193	+ int img_len = w * h * channels;
	1194	+ stbi_uc *reduced;
	1195	+
	1196	+ reduced = (stbi_uc *) stbi__malloc(img_len);
	1197	+ if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory");
	1198	+
	1199	+ for (i = 0; i < img_len; ++i)
	1200	+ reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling
	1201	+
	1202	+ STBI_FREE(orig);
	1203	+ return reduced;
	1204	+}
	1205	+
	1206	+static stbi__uint16 stbi__convert_8_to_16(stbi_uc orig, int w, int h, int channels)
	1207	+{
	1208	+ int i;
	1209	+ int img_len = w * h * channels;
	1210	+ stbi__uint16 *enlarged;
	1211	+
	1212	+ enlarged = (stbi__uint16 ) stbi__malloc(img_len2);
	1213	+ if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
	1214	+
	1215	+ for (i = 0; i < img_len; ++i)
	1216	+ enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
	1217	+
	1218	+ STBI_FREE(orig);
	1219	+ return enlarged;
	1220	+}
	1221	+
	1222	+static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
	1223	+{
	1224	+ int row;
	1225	+ size_t bytes_per_row = (size_t)w * bytes_per_pixel;
	1226	+ stbi_uc temp[2048];
	1227	+ stbi_uc bytes = (stbi_uc )image;
	1228	+
	1229	+ for (row = 0; row < (h>>1); row++) {
	1230	+ stbi_uc row0 = bytes + rowbytes_per_row;
	1231	+ stbi_uc row1 = bytes + (h - row - 1)bytes_per_row;
	1232	+ // swap row0 with row1
	1233	+ size_t bytes_left = bytes_per_row;
	1234	+ while (bytes_left) {
	1235	+ size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
	1236	+ memcpy(temp, row0, bytes_copy);
	1237	+ memcpy(row0, row1, bytes_copy);
	1238	+ memcpy(row1, temp, bytes_copy);
	1239	+ row0 += bytes_copy;
	1240	+ row1 += bytes_copy;
	1241	+ bytes_left -= bytes_copy;
	1242	+ }
	1243	+ }
	1244	+}
	1245	+
	1246	+#ifndef STBI_NO_GIF
	1247	+static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel)
	1248	+{
	1249	+ int slice;
	1250	+ int slice_size = w * h * bytes_per_pixel;
	1251	+
	1252	+ stbi_uc bytes = (stbi_uc )image;
	1253	+ for (slice = 0; slice < z; ++slice) {
	1254	+ stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
	1255	+ bytes += slice_size;
	1256	+ }
	1257	+}
	1258	+#endif
	1259	+
	1260	+static unsigned char stbi__load_and_postprocess_8bit(stbi__context s, int x, int y, int *comp, int req_comp)
	1261	+{
	1262	+ stbi__result_info ri;
	1263	+ void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
	1264	+
	1265	+ if (result == NULL)
	1266	+ return NULL;
	1267	+
	1268	+ // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
	1269	+ STBI_ASSERT(ri.bits_per_channel == 8 \|\| ri.bits_per_channel == 16);
	1270	+
	1271	+ if (ri.bits_per_channel != 8) {
	1272	+ result = stbi__convert_16_to_8((stbi__uint16 ) result, x, y, req_comp == 0 ? comp : req_comp);
	1273	+ ri.bits_per_channel = 8;
	1274	+ }
	1275	+
	1276	+ // @TODO: move stbi__convert_format to here
	1277	+
	1278	+ if (stbi__vertically_flip_on_load) {
	1279	+ int channels = req_comp ? req_comp : *comp;
	1280	+ stbi__vertical_flip(result, x, y, channels * sizeof(stbi_uc));
	1281	+ }
	1282	+
	1283	+ return (unsigned char *) result;
	1284	+}
	1285	+
	1286	+static stbi__uint16 stbi__load_and_postprocess_16bit(stbi__context s, int x, int y, int *comp, int req_comp)
	1287	+{
	1288	+ stbi__result_info ri;
	1289	+ void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
	1290	+
	1291	+ if (result == NULL)
	1292	+ return NULL;
	1293	+
	1294	+ // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
	1295	+ STBI_ASSERT(ri.bits_per_channel == 8 \|\| ri.bits_per_channel == 16);
	1296	+
	1297	+ if (ri.bits_per_channel != 16) {
	1298	+ result = stbi__convert_8_to_16((stbi_uc ) result, x, y, req_comp == 0 ? comp : req_comp);
	1299	+ ri.bits_per_channel = 16;
	1300	+ }
	1301	+
	1302	+ // @TODO: move stbi__convert_format16 to here
	1303	+ // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision
	1304	+
	1305	+ if (stbi__vertically_flip_on_load) {
	1306	+ int channels = req_comp ? req_comp : *comp;
	1307	+ stbi__vertical_flip(result, x, y, channels * sizeof(stbi__uint16));
	1308	+ }
	1309	+
	1310	+ return (stbi__uint16 *) result;
	1311	+}
	1312	+
	1313	+#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
	1314	+static void stbi__float_postprocess(float result, int x, int y, int comp, int req_comp)
	1315	+{
	1316	+ if (stbi__vertically_flip_on_load && result != NULL) {
	1317	+ int channels = req_comp ? req_comp : *comp;
	1318	+ stbi__vertical_flip(result, x, y, channels * sizeof(float));
	1319	+ }
	1320	+}
	1321	+#endif
	1322	+
	1323	+#ifndef STBI_NO_STDIO
	1324	+
	1325	+#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
	1326	+STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char str, int cbmb, wchar_t widestr, int cchwide);
	1327	+STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t widestr, int cchwide, char str, int cbmb, const char defchar, int used_default);
	1328	+#endif
	1329	+
	1330	+#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
	1331	+STBIDEF int stbi_convert_wchar_to_utf8(char buffer, size_t bufferlen, const wchar_t input)
	1332	+{
	1333	+ return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
	1334	+}
	1335	+#endif
	1336	+
	1337	+static FILE stbi__fopen(char const filename, char const *mode)
	1338	+{
	1339	+ FILE *f;
	1340	+#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
	1341	+ wchar_t wMode[64];
	1342	+ wchar_t wFilename[1024];
	1343	+ if (0 == MultiByteToWideChar(65001 /* UTF8 /, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(wFilename)))
	1344	+ return 0;
	1345	+
	1346	+ if (0 == MultiByteToWideChar(65001 /* UTF8 /, 0, mode, -1, wMode, sizeof(wMode)/sizeof(wMode)))
	1347	+ return 0;
	1348	+
	1349	+#if defined(_MSC_VER) && _MSC_VER >= 1400
	1350	+ if (0 != _wfopen_s(&f, wFilename, wMode))
	1351	+ f = 0;
	1352	+#else
	1353	+ f = _wfopen(wFilename, wMode);
	1354	+#endif
	1355	+
	1356	+#elif defined(_MSC_VER) && _MSC_VER >= 1400
	1357	+ if (0 != fopen_s(&f, filename, mode))
	1358	+ f=0;
	1359	+#else
	1360	+ f = fopen(filename, mode);
	1361	+#endif
	1362	+ return f;
	1363	+}
	1364	+
	1365	+
	1366	+STBIDEF stbi_uc stbi_load(char const filename, int x, int y, int *comp, int req_comp)
	1367	+{
	1368	+ FILE *f = stbi__fopen(filename, "rb");
	1369	+ unsigned char *result;
	1370	+ if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
	1371	+ result = stbi_load_from_file(f,x,y,comp,req_comp);
	1372	+ fclose(f);
	1373	+ return result;
	1374	+}
	1375	+
	1376	+STBIDEF stbi_uc stbi_load_from_file(FILE f, int x, int y, int *comp, int req_comp)
	1377	+{
	1378	+ unsigned char *result;
	1379	+ stbi__context s;
	1380	+ stbi__start_file(&s,f);
	1381	+ result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
	1382	+ if (result) {
	1383	+ // need to 'unget' all the characters in the IO buffer
	1384	+ fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
	1385	+ }
	1386	+ return result;
	1387	+}
	1388	+
	1389	+STBIDEF stbi__uint16 stbi_load_from_file_16(FILE f, int x, int y, int *comp, int req_comp)
	1390	+{
	1391	+ stbi__uint16 *result;
	1392	+ stbi__context s;
	1393	+ stbi__start_file(&s,f);
	1394	+ result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp);
	1395	+ if (result) {
	1396	+ // need to 'unget' all the characters in the IO buffer
	1397	+ fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
	1398	+ }
	1399	+ return result;
	1400	+}
	1401	+
	1402	+STBIDEF stbi_us stbi_load_16(char const filename, int x, int y, int *comp, int req_comp)
	1403	+{
	1404	+ FILE *f = stbi__fopen(filename, "rb");
	1405	+ stbi__uint16 *result;
	1406	+ if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file");
	1407	+ result = stbi_load_from_file_16(f,x,y,comp,req_comp);
	1408	+ fclose(f);
	1409	+ return result;
	1410	+}
	1411	+
	1412	+
	1413	+#endif //!STBI_NO_STDIO
	1414	+
	1415	+STBIDEF stbi_us stbi_load_16_from_memory(stbi_uc const buffer, int len, int x, int y, int *channels_in_file, int desired_channels)
	1416	+{
	1417	+ stbi__context s;
	1418	+ stbi__start_mem(&s,buffer,len);
	1419	+ return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
	1420	+}
	1421	+
	1422	+STBIDEF stbi_us stbi_load_16_from_callbacks(stbi_io_callbacks const clbk, void user, int x, int y, int channels_in_file, int desired_channels)
	1423	+{
	1424	+ stbi__context s;
	1425	+ stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user);
	1426	+ return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
	1427	+}
	1428	+
	1429	+STBIDEF stbi_uc stbi_load_from_memory(stbi_uc const buffer, int len, int x, int y, int *comp, int req_comp)
	1430	+{
	1431	+ stbi__context s;
	1432	+ stbi__start_mem(&s,buffer,len);
	1433	+ return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
	1434	+}
	1435	+
	1436	+STBIDEF stbi_uc stbi_load_from_callbacks(stbi_io_callbacks const clbk, void user, int x, int y, int comp, int req_comp)
	1437	+{
	1438	+ stbi__context s;
	1439	+ stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
	1440	+ return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
	1441	+}
	1442	+
	1443	+#ifndef STBI_NO_GIF
	1444	+STBIDEF stbi_uc stbi_load_gif_from_memory(stbi_uc const buffer, int len, int *delays, int x, int y, int z, int *comp, int req_comp)
	1445	+{
	1446	+ unsigned char *result;
	1447	+ stbi__context s;
	1448	+ stbi__start_mem(&s,buffer,len);
	1449	+
	1450	+ result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
	1451	+ if (stbi__vertically_flip_on_load) {
	1452	+ stbi__vertical_flip_slices( result, x, y, z, comp );
	1453	+ }
	1454	+
	1455	+ return result;
	1456	+}
	1457	+#endif
	1458	+
	1459	+#ifndef STBI_NO_LINEAR
	1460	+static float stbi__loadf_main(stbi__context s, int x, int y, int *comp, int req_comp)
	1461	+{
	1462	+ unsigned char *data;
	1463	+ #ifndef STBI_NO_HDR
	1464	+ if (stbi__hdr_test(s)) {
	1465	+ stbi__result_info ri;
	1466	+ float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri);
	1467	+ if (hdr_data)
	1468	+ stbi__float_postprocess(hdr_data,x,y,comp,req_comp);
	1469	+ return hdr_data;
	1470	+ }
	1471	+ #endif
	1472	+ data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
	1473	+ if (data)
	1474	+ return stbi__ldr_to_hdr(data, x, y, req_comp ? req_comp : *comp);
	1475	+ return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
	1476	+}
	1477	+
	1478	+STBIDEF float stbi_loadf_from_memory(stbi_uc const buffer, int len, int x, int y, int *comp, int req_comp)
	1479	+{
	1480	+ stbi__context s;
	1481	+ stbi__start_mem(&s,buffer,len);
	1482	+ return stbi__loadf_main(&s,x,y,comp,req_comp);
	1483	+}
	1484	+
	1485	+STBIDEF float stbi_loadf_from_callbacks(stbi_io_callbacks const clbk, void user, int x, int y, int comp, int req_comp)
	1486	+{
	1487	+ stbi__context s;
	1488	+ stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
	1489	+ return stbi__loadf_main(&s,x,y,comp,req_comp);
	1490	+}
	1491	+
	1492	+#ifndef STBI_NO_STDIO
	1493	+STBIDEF float stbi_loadf(char const filename, int x, int y, int *comp, int req_comp)
	1494	+{
	1495	+ float *result;
	1496	+ FILE *f = stbi__fopen(filename, "rb");
	1497	+ if (!f) return stbi__errpf("can't fopen", "Unable to open file");
	1498	+ result = stbi_loadf_from_file(f,x,y,comp,req_comp);
	1499	+ fclose(f);
	1500	+ return result;
	1501	+}
	1502	+
	1503	+STBIDEF float stbi_loadf_from_file(FILE f, int x, int y, int *comp, int req_comp)
	1504	+{
	1505	+ stbi__context s;
	1506	+ stbi__start_file(&s,f);
	1507	+ return stbi__loadf_main(&s,x,y,comp,req_comp);
	1508	+}
	1509	+#endif // !STBI_NO_STDIO
	1510	+
	1511	+#endif // !STBI_NO_LINEAR
	1512	+
	1513	+// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
	1514	+// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
	1515	+// reports false!
	1516	+
	1517	+STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
	1518	+{
	1519	+ #ifndef STBI_NO_HDR
	1520	+ stbi__context s;
	1521	+ stbi__start_mem(&s,buffer,len);
	1522	+ return stbi__hdr_test(&s);
	1523	+ #else
	1524	+ STBI_NOTUSED(buffer);
	1525	+ STBI_NOTUSED(len);
	1526	+ return 0;
	1527	+ #endif
	1528	+}
	1529	+
	1530	+#ifndef STBI_NO_STDIO
	1531	+STBIDEF int stbi_is_hdr (char const *filename)
	1532	+{
	1533	+ FILE *f = stbi__fopen(filename, "rb");
	1534	+ int result=0;
	1535	+ if (f) {
	1536	+ result = stbi_is_hdr_from_file(f);
	1537	+ fclose(f);
	1538	+ }
	1539	+ return result;
	1540	+}
	1541	+
	1542	+STBIDEF int stbi_is_hdr_from_file(FILE *f)
	1543	+{
	1544	+ #ifndef STBI_NO_HDR
	1545	+ long pos = ftell(f);
	1546	+ int res;
	1547	+ stbi__context s;
	1548	+ stbi__start_file(&s,f);
	1549	+ res = stbi__hdr_test(&s);
	1550	+ fseek(f, pos, SEEK_SET);
	1551	+ return res;
	1552	+ #else
	1553	+ STBI_NOTUSED(f);
	1554	+ return 0;
	1555	+ #endif
	1556	+}
	1557	+#endif // !STBI_NO_STDIO
	1558	+
	1559	+STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const clbk, void user)
	1560	+{
	1561	+ #ifndef STBI_NO_HDR
	1562	+ stbi__context s;
	1563	+ stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
	1564	+ return stbi__hdr_test(&s);
	1565	+ #else
	1566	+ STBI_NOTUSED(clbk);
	1567	+ STBI_NOTUSED(user);
	1568	+ return 0;
	1569	+ #endif
	1570	+}
	1571	+
	1572	+#ifndef STBI_NO_LINEAR
	1573	+static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
	1574	+
	1575	+STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
	1576	+STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
	1577	+#endif
	1578	+
	1579	+static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
	1580	+
	1581	+STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
	1582	+STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
	1583	+
	1584	+
	1585	+//////////////////////////////////////////////////////////////////////////////
	1586	+//
	1587	+// Common code used by all image loaders
	1588	+//
	1589	+
	1590	+enum
	1591	+{
	1592	+ STBI__SCAN_load=0,
	1593	+ STBI__SCAN_type,
	1594	+ STBI__SCAN_header
	1595	+};
	1596	+
	1597	+static void stbi__refill_buffer(stbi__context *s)
	1598	+{
	1599	+ int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
	1600	+ s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original);
	1601	+ if (n == 0) {
	1602	+ // at end of file, treat same as if from memory, but need to handle case
	1603	+ // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
	1604	+ s->read_from_callbacks = 0;
	1605	+ s->img_buffer = s->buffer_start;
	1606	+ s->img_buffer_end = s->buffer_start+1;
	1607	+ *s->img_buffer = 0;
	1608	+ } else {
	1609	+ s->img_buffer = s->buffer_start;
	1610	+ s->img_buffer_end = s->buffer_start + n;
	1611	+ }
	1612	+}
	1613	+
	1614	+stbi_inline static stbi_uc stbi__get8(stbi__context *s)
	1615	+{
	1616	+ if (s->img_buffer < s->img_buffer_end)
	1617	+ return *s->img_buffer++;
	1618	+ if (s->read_from_callbacks) {
	1619	+ stbi__refill_buffer(s);
	1620	+ return *s->img_buffer++;
	1621	+ }
	1622	+ return 0;
	1623	+}
	1624	+
	1625	+#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
	1626	+// nothing
	1627	+#else
	1628	+stbi_inline static int stbi__at_eof(stbi__context *s)
	1629	+{
	1630	+ if (s->io.read) {
	1631	+ if (!(s->io.eof)(s->io_user_data)) return 0;
	1632	+ // if feof() is true, check if buffer = end
	1633	+ // special case: we've only got the special 0 character at the end
	1634	+ if (s->read_from_callbacks == 0) return 1;
	1635	+ }
	1636	+
	1637	+ return s->img_buffer >= s->img_buffer_end;
	1638	+}
	1639	+#endif
	1640	+
	1641	+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC)
	1642	+// nothing
	1643	+#else
	1644	+static void stbi__skip(stbi__context *s, int n)
	1645	+{
	1646	+ if (n == 0) return; // already there!
	1647	+ if (n < 0) {
	1648	+ s->img_buffer = s->img_buffer_end;
	1649	+ return;
	1650	+ }
	1651	+ if (s->io.read) {
	1652	+ int blen = (int) (s->img_buffer_end - s->img_buffer);
	1653	+ if (blen < n) {
	1654	+ s->img_buffer = s->img_buffer_end;
	1655	+ (s->io.skip)(s->io_user_data, n - blen);
	1656	+ return;
	1657	+ }
	1658	+ }
	1659	+ s->img_buffer += n;
	1660	+}
	1661	+#endif
	1662	+
	1663	+#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM)
	1664	+// nothing
	1665	+#else
	1666	+static int stbi__getn(stbi__context s, stbi_uc buffer, int n)
	1667	+{
	1668	+ if (s->io.read) {
	1669	+ int blen = (int) (s->img_buffer_end - s->img_buffer);
	1670	+ if (blen < n) {
	1671	+ int res, count;
	1672	+
	1673	+ memcpy(buffer, s->img_buffer, blen);
	1674	+
	1675	+ count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
	1676	+ res = (count == (n-blen));
	1677	+ s->img_buffer = s->img_buffer_end;
	1678	+ return res;
	1679	+ }
	1680	+ }
	1681	+
	1682	+ if (s->img_buffer+n <= s->img_buffer_end) {
	1683	+ memcpy(buffer, s->img_buffer, n);
	1684	+ s->img_buffer += n;
	1685	+ return 1;
	1686	+ } else
	1687	+ return 0;
	1688	+}
	1689	+#endif
	1690	+
	1691	+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
	1692	+// nothing
	1693	+#else
	1694	+static int stbi__get16be(stbi__context *s)
	1695	+{
	1696	+ int z = stbi__get8(s);
	1697	+ return (z << 8) + stbi__get8(s);
	1698	+}
	1699	+#endif
	1700	+
	1701	+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
	1702	+// nothing
	1703	+#else
	1704	+static stbi__uint32 stbi__get32be(stbi__context *s)
	1705	+{
	1706	+ stbi__uint32 z = stbi__get16be(s);
	1707	+ return (z << 16) + stbi__get16be(s);
	1708	+}
	1709	+#endif
	1710	+
	1711	+#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
	1712	+// nothing
	1713	+#else
	1714	+static int stbi__get16le(stbi__context *s)
	1715	+{
	1716	+ int z = stbi__get8(s);
	1717	+ return z + (stbi__get8(s) << 8);
	1718	+}
	1719	+#endif
	1720	+
	1721	+#ifndef STBI_NO_BMP
	1722	+static stbi__uint32 stbi__get32le(stbi__context *s)
	1723	+{
	1724	+ stbi__uint32 z = stbi__get16le(s);
	1725	+ z += (stbi__uint32)stbi__get16le(s) << 16;
	1726	+ return z;
	1727	+}
	1728	+#endif
	1729	+
	1730	+#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings
	1731	+
	1732	+#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
	1733	+// nothing
	1734	+#else
	1735	+//////////////////////////////////////////////////////////////////////////////
	1736	+//
	1737	+// generic converter from built-in img_n to req_comp
	1738	+// individual types do this automatically as much as possible (e.g. jpeg
	1739	+// does all cases internally since it needs to colorspace convert anyway,
	1740	+// and it never has alpha, so very few cases ). png can automatically
	1741	+// interleave an alpha=255 channel, but falls back to this for other cases
	1742	+//
	1743	+// assume data buffer is malloced, so malloc a new one and free that one
	1744	+// only failure mode is malloc failing
	1745	+
	1746	+static stbi_uc stbi__compute_y(int r, int g, int b)
	1747	+{
	1748	+ return (stbi_uc) (((r77) + (g150) + (29*b)) >> 8);
	1749	+}
	1750	+#endif
	1751	+
	1752	+#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
	1753	+// nothing
	1754	+#else
	1755	+static unsigned char stbi__convert_format(unsigned char data, int img_n, int req_comp, unsigned int x, unsigned int y)
	1756	+{
	1757	+ int i,j;
	1758	+ unsigned char *good;
	1759	+
	1760	+ if (req_comp == img_n) return data;
	1761	+ STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
	1762	+
	1763	+ good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0);
	1764	+ if (good == NULL) {
	1765	+ STBI_FREE(data);
	1766	+ return stbi__errpuc("outofmem", "Out of memory");
	1767	+ }
	1768	+
	1769	+ for (j=0; j < (int) y; ++j) {
	1770	+ unsigned char src = data + j x * img_n ;
	1771	+ unsigned char dest = good + j x * req_comp;
	1772	+
	1773	+ #define STBI__COMBO(a,b) ((a)*8+(b))
	1774	+ #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
	1775	+ // convert source image with img_n components to one with req_comp components;
	1776	+ // avoid switch per pixel, so use switch per scanline and massive macros
	1777	+ switch (STBI__COMBO(img_n, req_comp)) {
	1778	+ STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255; } break;
	1779	+ STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
	1780	+ STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255; } break;
	1781	+ STBI__CASE(2,1) { dest[0]=src[0]; } break;
	1782	+ STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
	1783	+ STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break;
	1784	+ STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255; } break;
	1785	+ STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break;
	1786	+ STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255; } break;
	1787	+ STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break;
	1788	+ STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break;
	1789	+ STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break;
	1790	+ default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion");
	1791	+ }
	1792	+ #undef STBI__CASE
	1793	+ }
	1794	+
	1795	+ STBI_FREE(data);
	1796	+ return good;
	1797	+}
	1798	+#endif
	1799	+
	1800	+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
	1801	+// nothing
	1802	+#else
	1803	+static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
	1804	+{
	1805	+ return (stbi__uint16) (((r77) + (g150) + (29*b)) >> 8);
	1806	+}
	1807	+#endif
	1808	+
	1809	+#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
	1810	+// nothing
	1811	+#else
	1812	+static stbi__uint16 stbi__convert_format16(stbi__uint16 data, int img_n, int req_comp, unsigned int x, unsigned int y)
	1813	+{
	1814	+ int i,j;
	1815	+ stbi__uint16 *good;
	1816	+
	1817	+ if (req_comp == img_n) return data;
	1818	+ STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
	1819	+
	1820	+ good = (stbi__uint16 ) stbi__malloc(req_comp x * y * 2);
	1821	+ if (good == NULL) {
	1822	+ STBI_FREE(data);
	1823	+ return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
	1824	+ }
	1825	+
	1826	+ for (j=0; j < (int) y; ++j) {
	1827	+ stbi__uint16 src = data + j x * img_n ;
	1828	+ stbi__uint16 dest = good + j x * req_comp;
	1829	+
	1830	+ #define STBI__COMBO(a,b) ((a)*8+(b))
	1831	+ #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
	1832	+ // convert source image with img_n components to one with req_comp components;
	1833	+ // avoid switch per pixel, so use switch per scanline and massive macros
	1834	+ switch (STBI__COMBO(img_n, req_comp)) {
	1835	+ STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break;
	1836	+ STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
	1837	+ STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break;
	1838	+ STBI__CASE(2,1) { dest[0]=src[0]; } break;
	1839	+ STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
	1840	+ STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break;
	1841	+ STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break;
	1842	+ STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break;
	1843	+ STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break;
	1844	+ STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break;
	1845	+ STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break;
	1846	+ STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break;
	1847	+ default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion");
	1848	+ }
	1849	+ #undef STBI__CASE
	1850	+ }
	1851	+
	1852	+ STBI_FREE(data);
	1853	+ return good;
	1854	+}
	1855	+#endif
	1856	+
	1857	+#ifndef STBI_NO_LINEAR
	1858	+static float stbi__ldr_to_hdr(stbi_uc data, int x, int y, int comp)
	1859	+{
	1860	+ int i,k,n;
	1861	+ float *output;
	1862	+ if (!data) return NULL;
	1863	+ output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
	1864	+ if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); }
	1865	+ // compute number of non-alpha components
	1866	+ if (comp & 1) n = comp; else n = comp-1;
	1867	+ for (i=0; i < x*y; ++i) {
	1868	+ for (k=0; k < n; ++k) {
	1869	+ output[icomp + k] = (float) (pow(data[icomp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
	1870	+ }
	1871	+ }
	1872	+ if (n < comp) {
	1873	+ for (i=0; i < x*y; ++i) {
	1874	+ output[icomp + n] = data[icomp + n]/255.0f;
	1875	+ }
	1876	+ }
	1877	+ STBI_FREE(data);
	1878	+ return output;
	1879	+}
	1880	+#endif
	1881	+
	1882	+#ifndef STBI_NO_HDR
	1883	+#define stbi__float2int(x) ((int) (x))
	1884	+static stbi_uc stbi__hdr_to_ldr(float data, int x, int y, int comp)
	1885	+{
	1886	+ int i,k,n;
	1887	+ stbi_uc *output;
	1888	+ if (!data) return NULL;
	1889	+ output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0);
	1890	+ if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); }
	1891	+ // compute number of non-alpha components
	1892	+ if (comp & 1) n = comp; else n = comp-1;
	1893	+ for (i=0; i < x*y; ++i) {
	1894	+ for (k=0; k < n; ++k) {
	1895	+ float z = (float) pow(data[icomp+k]stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
	1896	+ if (z < 0) z = 0;
	1897	+ if (z > 255) z = 255;
	1898	+ output[i*comp + k] = (stbi_uc) stbi__float2int(z);
	1899	+ }
	1900	+ if (k < comp) {
	1901	+ float z = data[icomp+k] 255 + 0.5f;
	1902	+ if (z < 0) z = 0;
	1903	+ if (z > 255) z = 255;
	1904	+ output[i*comp + k] = (stbi_uc) stbi__float2int(z);
	1905	+ }
	1906	+ }
	1907	+ STBI_FREE(data);
	1908	+ return output;
	1909	+}
	1910	+#endif
	1911	+
	1912	+//////////////////////////////////////////////////////////////////////////////
	1913	+//
	1914	+// "baseline" JPEG/JFIF decoder
	1915	+//
	1916	+// simple implementation
	1917	+// - doesn't support delayed output of y-dimension
	1918	+// - simple interface (only one output format: 8-bit interleaved RGB)
	1919	+// - doesn't try to recover corrupt jpegs
	1920	+// - doesn't allow partial loading, loading multiple at once
	1921	+// - still fast on x86 (copying globals into locals doesn't help x86)
	1922	+// - allocates lots of intermediate memory (full size of all components)
	1923	+// - non-interleaved case requires this anyway
	1924	+// - allows good upsampling (see next)
	1925	+// high-quality
	1926	+// - upsampled channels are bilinearly interpolated, even across blocks
	1927	+// - quality integer IDCT derived from IJG's 'slow'
	1928	+// performance
	1929	+// - fast huffman; reasonable integer IDCT
	1930	+// - some SIMD kernels for common paths on targets with SSE2/NEON
	1931	+// - uses a lot of intermediate memory, could cache poorly
	1932	+
	1933	+#ifndef STBI_NO_JPEG
	1934	+
	1935	+// huffman decoding acceleration
	1936	+#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
	1937	+
	1938	+typedef struct
	1939	+{
	1940	+ stbi_uc fast[1 << FAST_BITS];
	1941	+ // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
	1942	+ stbi__uint16 code[256];
	1943	+ stbi_uc values[256];
	1944	+ stbi_uc size[257];
	1945	+ unsigned int maxcode[18];
	1946	+ int delta[17]; // old 'firstsymbol' - old 'firstcode'
	1947	+} stbi__huffman;
	1948	+
	1949	+typedef struct
	1950	+{
	1951	+ stbi__context *s;
	1952	+ stbi__huffman huff_dc[4];
	1953	+ stbi__huffman huff_ac[4];
	1954	+ stbi__uint16 dequant[4][64];
	1955	+ stbi__int16 fast_ac[4][1 << FAST_BITS];
	1956	+
	1957	+// sizes for components, interleaved MCUs
	1958	+ int img_h_max, img_v_max;
	1959	+ int img_mcu_x, img_mcu_y;
	1960	+ int img_mcu_w, img_mcu_h;
	1961	+
	1962	+// definition of jpeg image component
	1963	+ struct
	1964	+ {
	1965	+ int id;
	1966	+ int h,v;
	1967	+ int tq;
	1968	+ int hd,ha;
	1969	+ int dc_pred;
	1970	+
	1971	+ int x,y,w2,h2;
	1972	+ stbi_uc *data;
	1973	+ void raw_data, raw_coeff;
	1974	+ stbi_uc *linebuf;
	1975	+ short *coeff; // progressive only
	1976	+ int coeff_w, coeff_h; // number of 8x8 coefficient blocks
	1977	+ } img_comp[4];
	1978	+
	1979	+ stbi__uint32 code_buffer; // jpeg entropy-coded buffer
	1980	+ int code_bits; // number of valid bits
	1981	+ unsigned char marker; // marker seen while filling entropy buffer
	1982	+ int nomore; // flag if we saw a marker so must stop
	1983	+
	1984	+ int progressive;
	1985	+ int spec_start;
	1986	+ int spec_end;
	1987	+ int succ_high;
	1988	+ int succ_low;
	1989	+ int eob_run;
	1990	+ int jfif;
	1991	+ int app14_color_transform; // Adobe APP14 tag
	1992	+ int rgb;
	1993	+
	1994	+ int scan_n, order[4];
	1995	+ int restart_interval, todo;
	1996	+
	1997	+// kernels
	1998	+ void (idct_block_kernel)(stbi_uc out, int out_stride, short data[64]);
	1999	+ void (YCbCr_to_RGB_kernel)(stbi_uc out, const stbi_uc y, const stbi_uc pcb, const stbi_uc *pcr, int count, int step);
	2000	+ stbi_uc (resample_row_hv_2_kernel)(stbi_uc out, stbi_uc in_near, stbi_uc *in_far, int w, int hs);
	2001	+} stbi__jpeg;
	2002	+
	2003	+static int stbi__build_huffman(stbi__huffman h, int count)
	2004	+{
	2005	+ int i,j,k=0;
	2006	+ unsigned int code;
	2007	+ // build size list for each symbol (from JPEG spec)
	2008	+ for (i=0; i < 16; ++i) {
	2009	+ for (j=0; j < count[i]; ++j) {
	2010	+ h->size[k++] = (stbi_uc) (i+1);
	2011	+ if(k >= 257) return stbi__err("bad size list","Corrupt JPEG");
	2012	+ }
	2013	+ }
	2014	+ h->size[k] = 0;
	2015	+
	2016	+ // compute actual symbols (from jpeg spec)
	2017	+ code = 0;
	2018	+ k = 0;
	2019	+ for(j=1; j <= 16; ++j) {
	2020	+ // compute delta to add to code to compute symbol id
	2021	+ h->delta[j] = k - code;
	2022	+ if (h->size[k] == j) {
	2023	+ while (h->size[k] == j)
	2024	+ h->code[k++] = (stbi__uint16) (code++);
	2025	+ if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG");
	2026	+ }
	2027	+ // compute largest code + 1 for this size, preshifted as needed later
	2028	+ h->maxcode[j] = code << (16-j);
	2029	+ code <<= 1;
	2030	+ }
	2031	+ h->maxcode[j] = 0xffffffff;
	2032	+
	2033	+ // build non-spec acceleration table; 255 is flag for not-accelerated
	2034	+ memset(h->fast, 255, 1 << FAST_BITS);
	2035	+ for (i=0; i < k; ++i) {
	2036	+ int s = h->size[i];
	2037	+ if (s <= FAST_BITS) {
	2038	+ int c = h->code[i] << (FAST_BITS-s);
	2039	+ int m = 1 << (FAST_BITS-s);
	2040	+ for (j=0; j < m; ++j) {
	2041	+ h->fast[c+j] = (stbi_uc) i;
	2042	+ }
	2043	+ }
	2044	+ }
	2045	+ return 1;
	2046	+}
	2047	+
	2048	+// build a table that decodes both magnitude and value of small ACs in
	2049	+// one go.
	2050	+static void stbi__build_fast_ac(stbi__int16 fast_ac, stbi__huffman h)
	2051	+{
	2052	+ int i;
	2053	+ for (i=0; i < (1 << FAST_BITS); ++i) {
	2054	+ stbi_uc fast = h->fast[i];
	2055	+ fast_ac[i] = 0;
	2056	+ if (fast < 255) {
	2057	+ int rs = h->values[fast];
	2058	+ int run = (rs >> 4) & 15;
	2059	+ int magbits = rs & 15;
	2060	+ int len = h->size[fast];
	2061	+
	2062	+ if (magbits && len + magbits <= FAST_BITS) {
	2063	+ // magnitude code followed by receive_extend code
	2064	+ int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
	2065	+ int m = 1 << (magbits - 1);
	2066	+ if (k < m) k += (~0U << magbits) + 1;
	2067	+ // if the result is small enough, we can fit it in fast_ac table
	2068	+ if (k >= -128 && k <= 127)
	2069	+ fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits));
	2070	+ }
	2071	+ }
	2072	+ }
	2073	+}
	2074	+
	2075	+static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
	2076	+{
	2077	+ do {
	2078	+ unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
	2079	+ if (b == 0xff) {
	2080	+ int c = stbi__get8(j->s);
	2081	+ while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes
	2082	+ if (c != 0) {
	2083	+ j->marker = (unsigned char) c;
	2084	+ j->nomore = 1;
	2085	+ return;
	2086	+ }
	2087	+ }
	2088	+ j->code_buffer \|= b << (24 - j->code_bits);
	2089	+ j->code_bits += 8;
	2090	+ } while (j->code_bits <= 24);
	2091	+}
	2092	+
	2093	+// (1 << n) - 1
	2094	+static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
	2095	+
	2096	+// decode a jpeg huffman value from the bitstream
	2097	+stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg j, stbi__huffman h)
	2098	+{
	2099	+ unsigned int temp;
	2100	+ int c,k;
	2101	+
	2102	+ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
	2103	+
	2104	+ // look at the top FAST_BITS and determine what symbol ID it is,
	2105	+ // if the code is <= FAST_BITS
	2106	+ c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
	2107	+ k = h->fast[c];
	2108	+ if (k < 255) {
	2109	+ int s = h->size[k];
	2110	+ if (s > j->code_bits)
	2111	+ return -1;
	2112	+ j->code_buffer <<= s;
	2113	+ j->code_bits -= s;
	2114	+ return h->values[k];
	2115	+ }
	2116	+
	2117	+ // naive test is to shift the code_buffer down so k bits are
	2118	+ // valid, then test against maxcode. To speed this up, we've
	2119	+ // preshifted maxcode left so that it has (16-k) 0s at the
	2120	+ // end; in other words, regardless of the number of bits, it
	2121	+ // wants to be compared against something shifted to have 16;
	2122	+ // that way we don't need to shift inside the loop.
	2123	+ temp = j->code_buffer >> 16;
	2124	+ for (k=FAST_BITS+1 ; ; ++k)
	2125	+ if (temp < h->maxcode[k])
	2126	+ break;
	2127	+ if (k == 17) {
	2128	+ // error! code not found
	2129	+ j->code_bits -= 16;
	2130	+ return -1;
	2131	+ }
	2132	+
	2133	+ if (k > j->code_bits)
	2134	+ return -1;
	2135	+
	2136	+ // convert the huffman code to the symbol id
	2137	+ c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
	2138	+ if(c < 0 \|\| c >= 256) // symbol id out of bounds!
	2139	+ return -1;
	2140	+ STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
	2141	+
	2142	+ // convert the id to a symbol
	2143	+ j->code_bits -= k;
	2144	+ j->code_buffer <<= k;
	2145	+ return h->values[c];
	2146	+}
	2147	+
	2148	+// bias[n] = (-1<<n) + 1
	2149	+static const int stbi__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767};
	2150	+
	2151	+// combined JPEG 'receive' and JPEG 'extend', since baseline
	2152	+// always extends everything it receives.
	2153	+stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
	2154	+{
	2155	+ unsigned int k;
	2156	+ int sgn;
	2157	+ if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
	2158	+ if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing
	2159	+
	2160	+ sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative)
	2161	+ k = stbi_lrot(j->code_buffer, n);
	2162	+ j->code_buffer = k & ~stbi__bmask[n];
	2163	+ k &= stbi__bmask[n];
	2164	+ j->code_bits -= n;
	2165	+ return k + (stbi__jbias[n] & (sgn - 1));
	2166	+}
	2167	+
	2168	+// get some unsigned bits
	2169	+stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n)
	2170	+{
	2171	+ unsigned int k;
	2172	+ if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
	2173	+ if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing
	2174	+ k = stbi_lrot(j->code_buffer, n);
	2175	+ j->code_buffer = k & ~stbi__bmask[n];
	2176	+ k &= stbi__bmask[n];
	2177	+ j->code_bits -= n;
	2178	+ return k;
	2179	+}
	2180	+
	2181	+stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j)
	2182	+{
	2183	+ unsigned int k;
	2184	+ if (j->code_bits < 1) stbi__grow_buffer_unsafe(j);
	2185	+ if (j->code_bits < 1) return 0; // ran out of bits from stream, return 0s intead of continuing
	2186	+ k = j->code_buffer;
	2187	+ j->code_buffer <<= 1;
	2188	+ --j->code_bits;
	2189	+ return k & 0x80000000;
	2190	+}
	2191	+
	2192	+// given a value that's at position X in the zigzag stream,
	2193	+// where does it appear in the 8x8 matrix coded as row-major?
	2194	+static const stbi_uc stbi__jpeg_dezigzag[64+15] =
	2195	+{
	2196	+ 0, 1, 8, 16, 9, 2, 3, 10,
	2197	+ 17, 24, 32, 25, 18, 11, 4, 5,
	2198	+ 12, 19, 26, 33, 40, 48, 41, 34,
	2199	+ 27, 20, 13, 6, 7, 14, 21, 28,
	2200	+ 35, 42, 49, 56, 57, 50, 43, 36,
	2201	+ 29, 22, 15, 23, 30, 37, 44, 51,
	2202	+ 58, 59, 52, 45, 38, 31, 39, 46,
	2203	+ 53, 60, 61, 54, 47, 55, 62, 63,
	2204	+ // let corrupt input sample past end
	2205	+ 63, 63, 63, 63, 63, 63, 63, 63,
	2206	+ 63, 63, 63, 63, 63, 63, 63
	2207	+};
	2208	+
	2209	+// decode one 64-entry block--
	2210	+static int stbi__jpeg_decode_block(stbi__jpeg j, short data[64], stbi__huffman hdc, stbi__huffman hac, stbi__int16 fac, int b, stbi__uint16 *dequant)
	2211	+{
	2212	+ int diff,dc,k;
	2213	+ int t;
	2214	+
	2215	+ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
	2216	+ t = stbi__jpeg_huff_decode(j, hdc);
	2217	+ if (t < 0 \|\| t > 15) return stbi__err("bad huffman code","Corrupt JPEG");
	2218	+
	2219	+ // 0 all the ac values now so we can do it 32-bits at a time
	2220	+ memset(data,0,64*sizeof(data[0]));
	2221	+
	2222	+ diff = t ? stbi__extend_receive(j, t) : 0;
	2223	+ if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta","Corrupt JPEG");
	2224	+ dc = j->img_comp[b].dc_pred + diff;
	2225	+ j->img_comp[b].dc_pred = dc;
	2226	+ if (!stbi__mul2shorts_valid(dc, dequant[0])) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
	2227	+ data[0] = (short) (dc * dequant[0]);
	2228	+
	2229	+ // decode AC components, see JPEG spec
	2230	+ k = 1;
	2231	+ do {
	2232	+ unsigned int zig;
	2233	+ int c,r,s;
	2234	+ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
	2235	+ c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
	2236	+ r = fac[c];
	2237	+ if (r) { // fast-AC path
	2238	+ k += (r >> 4) & 15; // run
	2239	+ s = r & 15; // combined length
	2240	+ if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available");
	2241	+ j->code_buffer <<= s;
	2242	+ j->code_bits -= s;
	2243	+ // decode into unzigzag'd location
	2244	+ zig = stbi__jpeg_dezigzag[k++];
	2245	+ data[zig] = (short) ((r >> 8) * dequant[zig]);
	2246	+ } else {
	2247	+ int rs = stbi__jpeg_huff_decode(j, hac);
	2248	+ if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
	2249	+ s = rs & 15;
	2250	+ r = rs >> 4;
	2251	+ if (s == 0) {
	2252	+ if (rs != 0xf0) break; // end block
	2253	+ k += 16;
	2254	+ } else {
	2255	+ k += r;
	2256	+ // decode into unzigzag'd location
	2257	+ zig = stbi__jpeg_dezigzag[k++];
	2258	+ data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]);
	2259	+ }
	2260	+ }
	2261	+ } while (k < 64);
	2262	+ return 1;
	2263	+}
	2264	+
	2265	+static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg j, short data[64], stbi__huffman hdc, int b)
	2266	+{
	2267	+ int diff,dc;
	2268	+ int t;
	2269	+ if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
	2270	+
	2271	+ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
	2272	+
	2273	+ if (j->succ_high == 0) {
	2274	+ // first scan for DC coefficient, must be first
	2275	+ memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
	2276	+ t = stbi__jpeg_huff_decode(j, hdc);
	2277	+ if (t < 0 \|\| t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
	2278	+ diff = t ? stbi__extend_receive(j, t) : 0;
	2279	+
	2280	+ if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta", "Corrupt JPEG");
	2281	+ dc = j->img_comp[b].dc_pred + diff;
	2282	+ j->img_comp[b].dc_pred = dc;
	2283	+ if (!stbi__mul2shorts_valid(dc, 1 << j->succ_low)) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
	2284	+ data[0] = (short) (dc * (1 << j->succ_low));
	2285	+ } else {
	2286	+ // refinement scan for DC coefficient
	2287	+ if (stbi__jpeg_get_bit(j))
	2288	+ data[0] += (short) (1 << j->succ_low);
	2289	+ }
	2290	+ return 1;
	2291	+}
	2292	+
	2293	+// @OPTIMIZE: store non-zigzagged during the decode passes,
	2294	+// and only de-zigzag when dequantizing
	2295	+static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg j, short data[64], stbi__huffman hac, stbi__int16 *fac)
	2296	+{
	2297	+ int k;
	2298	+ if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
	2299	+
	2300	+ if (j->succ_high == 0) {
	2301	+ int shift = j->succ_low;
	2302	+
	2303	+ if (j->eob_run) {
	2304	+ --j->eob_run;
	2305	+ return 1;
	2306	+ }
	2307	+
	2308	+ k = j->spec_start;
	2309	+ do {
	2310	+ unsigned int zig;
	2311	+ int c,r,s;
	2312	+ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
	2313	+ c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
	2314	+ r = fac[c];
	2315	+ if (r) { // fast-AC path
	2316	+ k += (r >> 4) & 15; // run
	2317	+ s = r & 15; // combined length
	2318	+ if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available");
	2319	+ j->code_buffer <<= s;
	2320	+ j->code_bits -= s;
	2321	+ zig = stbi__jpeg_dezigzag[k++];
	2322	+ data[zig] = (short) ((r >> 8) * (1 << shift));
	2323	+ } else {
	2324	+ int rs = stbi__jpeg_huff_decode(j, hac);
	2325	+ if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
	2326	+ s = rs & 15;
	2327	+ r = rs >> 4;
	2328	+ if (s == 0) {
	2329	+ if (r < 15) {
	2330	+ j->eob_run = (1 << r);
	2331	+ if (r)
	2332	+ j->eob_run += stbi__jpeg_get_bits(j, r);
	2333	+ --j->eob_run;
	2334	+ break;
	2335	+ }
	2336	+ k += 16;
	2337	+ } else {
	2338	+ k += r;
	2339	+ zig = stbi__jpeg_dezigzag[k++];
	2340	+ data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift));
	2341	+ }
	2342	+ }
	2343	+ } while (k <= j->spec_end);
	2344	+ } else {
	2345	+ // refinement scan for these AC coefficients
	2346	+
	2347	+ short bit = (short) (1 << j->succ_low);
	2348	+
	2349	+ if (j->eob_run) {
	2350	+ --j->eob_run;
	2351	+ for (k = j->spec_start; k <= j->spec_end; ++k) {
	2352	+ short *p = &data[stbi__jpeg_dezigzag[k]];
	2353	+ if (*p != 0)
	2354	+ if (stbi__jpeg_get_bit(j))
	2355	+ if ((*p & bit)==0) {
	2356	+ if (*p > 0)
	2357	+ *p += bit;
	2358	+ else
	2359	+ *p -= bit;
	2360	+ }
	2361	+ }
	2362	+ } else {
	2363	+ k = j->spec_start;
	2364	+ do {
	2365	+ int r,s;
	2366	+ int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh
	2367	+ if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
	2368	+ s = rs & 15;
	2369	+ r = rs >> 4;
	2370	+ if (s == 0) {
	2371	+ if (r < 15) {
	2372	+ j->eob_run = (1 << r) - 1;
	2373	+ if (r)
	2374	+ j->eob_run += stbi__jpeg_get_bits(j, r);
	2375	+ r = 64; // force end of block
	2376	+ } else {
	2377	+ // r=15 s=0 should write 16 0s, so we just do
	2378	+ // a run of 15 0s and then write s (which is 0),
	2379	+ // so we don't have to do anything special here
	2380	+ }
	2381	+ } else {
	2382	+ if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG");
	2383	+ // sign bit
	2384	+ if (stbi__jpeg_get_bit(j))
	2385	+ s = bit;
	2386	+ else
	2387	+ s = -bit;
	2388	+ }
	2389	+
	2390	+ // advance by r
	2391	+ while (k <= j->spec_end) {
	2392	+ short *p = &data[stbi__jpeg_dezigzag[k++]];
	2393	+ if (*p != 0) {
	2394	+ if (stbi__jpeg_get_bit(j))
	2395	+ if ((*p & bit)==0) {
	2396	+ if (*p > 0)
	2397	+ *p += bit;
	2398	+ else
	2399	+ *p -= bit;
	2400	+ }
	2401	+ } else {
	2402	+ if (r == 0) {
	2403	+ *p = (short) s;
	2404	+ break;
	2405	+ }
	2406	+ --r;
	2407	+ }
	2408	+ }
	2409	+ } while (k <= j->spec_end);
	2410	+ }
	2411	+ }
	2412	+ return 1;
	2413	+}
	2414	+
	2415	+// take a -128..127 value and stbi__clamp it and convert to 0..255
	2416	+stbi_inline static stbi_uc stbi__clamp(int x)
	2417	+{
	2418	+ // trick to use a single test to catch both cases
	2419	+ if ((unsigned int) x > 255) {
	2420	+ if (x < 0) return 0;
	2421	+ if (x > 255) return 255;
	2422	+ }
	2423	+ return (stbi_uc) x;
	2424	+}
	2425	+
	2426	+#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5)))
	2427	+#define stbi__fsh(x) ((x) * 4096)
	2428	+
	2429	+// derived from jidctint -- DCT_ISLOW
	2430	+#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
	2431	+ int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
	2432	+ p2 = s2; \
	2433	+ p3 = s6; \
	2434	+ p1 = (p2+p3) * stbi__f2f(0.5411961f); \
	2435	+ t2 = p1 + p3*stbi__f2f(-1.847759065f); \
	2436	+ t3 = p1 + p2*stbi__f2f( 0.765366865f); \
	2437	+ p2 = s0; \
	2438	+ p3 = s4; \
	2439	+ t0 = stbi__fsh(p2+p3); \
	2440	+ t1 = stbi__fsh(p2-p3); \
	2441	+ x0 = t0+t3; \
	2442	+ x3 = t0-t3; \
	2443	+ x1 = t1+t2; \
	2444	+ x2 = t1-t2; \
	2445	+ t0 = s7; \
	2446	+ t1 = s5; \
	2447	+ t2 = s3; \
	2448	+ t3 = s1; \
	2449	+ p3 = t0+t2; \
	2450	+ p4 = t1+t3; \
	2451	+ p1 = t0+t3; \
	2452	+ p2 = t1+t2; \
	2453	+ p5 = (p3+p4)*stbi__f2f( 1.175875602f); \
	2454	+ t0 = t0*stbi__f2f( 0.298631336f); \
	2455	+ t1 = t1*stbi__f2f( 2.053119869f); \
	2456	+ t2 = t2*stbi__f2f( 3.072711026f); \
	2457	+ t3 = t3*stbi__f2f( 1.501321110f); \
	2458	+ p1 = p5 + p1*stbi__f2f(-0.899976223f); \
	2459	+ p2 = p5 + p2*stbi__f2f(-2.562915447f); \
	2460	+ p3 = p3*stbi__f2f(-1.961570560f); \
	2461	+ p4 = p4*stbi__f2f(-0.390180644f); \
	2462	+ t3 += p1+p4; \
	2463	+ t2 += p2+p3; \
	2464	+ t1 += p2+p4; \
	2465	+ t0 += p1+p3;
	2466	+
	2467	+static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64])
	2468	+{
	2469	+ int i,val[64],*v=val;
	2470	+ stbi_uc *o;
	2471	+ short *d = data;
	2472	+
	2473	+ // columns
	2474	+ for (i=0; i < 8; ++i,++d, ++v) {
	2475	+ // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
	2476	+ if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
	2477	+ && d[40]==0 && d[48]==0 && d[56]==0) {
	2478	+ // no shortcut 0 seconds
	2479	+ // (1\|2\|3\|4\|5\|6\|7)==0 0 seconds
	2480	+ // all separate -0.047 seconds
	2481	+ // 1 && 2\|3 && 4\|5 && 6\|7: -0.047 seconds
	2482	+ int dcterm = d[0]*4;
	2483	+ v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
	2484	+ } else {
	2485	+ STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56])
	2486	+ // constants scaled things up by 1<<12; let's bring them back
	2487	+ // down, but keep 2 extra bits of precision
	2488	+ x0 += 512; x1 += 512; x2 += 512; x3 += 512;
	2489	+ v[ 0] = (x0+t3) >> 10;
	2490	+ v[56] = (x0-t3) >> 10;
	2491	+ v[ 8] = (x1+t2) >> 10;
	2492	+ v[48] = (x1-t2) >> 10;
	2493	+ v[16] = (x2+t1) >> 10;
	2494	+ v[40] = (x2-t1) >> 10;
	2495	+ v[24] = (x3+t0) >> 10;
	2496	+ v[32] = (x3-t0) >> 10;
	2497	+ }
	2498	+ }
	2499	+
	2500	+ for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
	2501	+ // no fast case since the first 1D IDCT spread components out
	2502	+ STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
	2503	+ // constants scaled things up by 1<<12, plus we had 1<<2 from first
	2504	+ // loop, plus horizontal and vertical each scale by sqrt(8) so together
	2505	+ // we've got an extra 1<<3, so 1<<17 total we need to remove.
	2506	+ // so we want to round that, which means adding 0.5 * 1<<17,
	2507	+ // aka 65536. Also, we'll end up with -128 to 127 that we want
	2508	+ // to encode as 0..255 by adding 128, so we'll add that before the shift
	2509	+ x0 += 65536 + (128<<17);
	2510	+ x1 += 65536 + (128<<17);
	2511	+ x2 += 65536 + (128<<17);
	2512	+ x3 += 65536 + (128<<17);
	2513	+ // tried computing the shifts into temps, or'ing the temps to see
	2514	+ // if any were out of range, but that was slower
	2515	+ o[0] = stbi__clamp((x0+t3) >> 17);
	2516	+ o[7] = stbi__clamp((x0-t3) >> 17);
	2517	+ o[1] = stbi__clamp((x1+t2) >> 17);
	2518	+ o[6] = stbi__clamp((x1-t2) >> 17);
	2519	+ o[2] = stbi__clamp((x2+t1) >> 17);
	2520	+ o[5] = stbi__clamp((x2-t1) >> 17);
	2521	+ o[3] = stbi__clamp((x3+t0) >> 17);
	2522	+ o[4] = stbi__clamp((x3-t0) >> 17);
	2523	+ }
	2524	+}
	2525	+
	2526	+#ifdef STBI_SSE2
	2527	+// sse2 integer IDCT. not the fastest possible implementation but it
	2528	+// produces bit-identical results to the generic C version so it's
	2529	+// fully "transparent".
	2530	+static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
	2531	+{
	2532	+ // This is constructed to match our regular (generic) integer IDCT exactly.
	2533	+ __m128i row0, row1, row2, row3, row4, row5, row6, row7;
	2534	+ __m128i tmp;
	2535	+
	2536	+ // dot product constant: even elems=x, odd elems=y
	2537	+ #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y))
	2538	+
	2539	+ // out(0) = c0[even]x + c0[odd]y (c0, x, y 16-bit, out 32-bit)
	2540	+ // out(1) = c1[even]x + c1[odd]y
	2541	+ #define dct_rot(out0,out1, x,y,c0,c1) \
	2542	+ __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \
	2543	+ __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \
	2544	+ __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \
	2545	+ __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \
	2546	+ __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \
	2547	+ __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
	2548	+
	2549	+ // out = in << 12 (in 16-bit, out 32-bit)
	2550	+ #define dct_widen(out, in) \
	2551	+ __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \
	2552	+ __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
	2553	+
	2554	+ // wide add
	2555	+ #define dct_wadd(out, a, b) \
	2556	+ __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \
	2557	+ __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
	2558	+
	2559	+ // wide sub
	2560	+ #define dct_wsub(out, a, b) \
	2561	+ __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \
	2562	+ __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
	2563	+
	2564	+ // butterfly a/b, add bias, then shift by "s" and pack
	2565	+ #define dct_bfly32o(out0, out1, a,b,bias,s) \
	2566	+ { \
	2567	+ __m128i abiased_l = _mm_add_epi32(a##_l, bias); \
	2568	+ __m128i abiased_h = _mm_add_epi32(a##_h, bias); \
	2569	+ dct_wadd(sum, abiased, b); \
	2570	+ dct_wsub(dif, abiased, b); \
	2571	+ out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \
	2572	+ out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \
	2573	+ }
	2574	+
	2575	+ // 8-bit interleave step (for transposes)
	2576	+ #define dct_interleave8(a, b) \
	2577	+ tmp = a; \
	2578	+ a = _mm_unpacklo_epi8(a, b); \
	2579	+ b = _mm_unpackhi_epi8(tmp, b)
	2580	+
	2581	+ // 16-bit interleave step (for transposes)
	2582	+ #define dct_interleave16(a, b) \
	2583	+ tmp = a; \
	2584	+ a = _mm_unpacklo_epi16(a, b); \
	2585	+ b = _mm_unpackhi_epi16(tmp, b)
	2586	+
	2587	+ #define dct_pass(bias,shift) \
	2588	+ { \
	2589	+ /* even part */ \
	2590	+ dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \
	2591	+ __m128i sum04 = _mm_add_epi16(row0, row4); \
	2592	+ __m128i dif04 = _mm_sub_epi16(row0, row4); \
	2593	+ dct_widen(t0e, sum04); \
	2594	+ dct_widen(t1e, dif04); \
	2595	+ dct_wadd(x0, t0e, t3e); \
	2596	+ dct_wsub(x3, t0e, t3e); \
	2597	+ dct_wadd(x1, t1e, t2e); \
	2598	+ dct_wsub(x2, t1e, t2e); \
	2599	+ /* odd part */ \
	2600	+ dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \
	2601	+ dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \
	2602	+ __m128i sum17 = _mm_add_epi16(row1, row7); \
	2603	+ __m128i sum35 = _mm_add_epi16(row3, row5); \
	2604	+ dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \
	2605	+ dct_wadd(x4, y0o, y4o); \
	2606	+ dct_wadd(x5, y1o, y5o); \
	2607	+ dct_wadd(x6, y2o, y5o); \
	2608	+ dct_wadd(x7, y3o, y4o); \
	2609	+ dct_bfly32o(row0,row7, x0,x7,bias,shift); \
	2610	+ dct_bfly32o(row1,row6, x1,x6,bias,shift); \
	2611	+ dct_bfly32o(row2,row5, x2,x5,bias,shift); \
	2612	+ dct_bfly32o(row3,row4, x3,x4,bias,shift); \
	2613	+ }
	2614	+
	2615	+ __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
	2616	+ __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f));
	2617	+ __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
	2618	+ __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
	2619	+ __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f));
	2620	+ __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f));
	2621	+ __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f));
	2622	+ __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f));
	2623	+
	2624	+ // rounding biases in column/row passes, see stbi__idct_block for explanation.
	2625	+ __m128i bias_0 = _mm_set1_epi32(512);
	2626	+ __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17));
	2627	+
	2628	+ // load
	2629	+ row0 = _mm_load_si128((const __m128i ) (data + 08));
	2630	+ row1 = _mm_load_si128((const __m128i ) (data + 18));
	2631	+ row2 = _mm_load_si128((const __m128i ) (data + 28));
	2632	+ row3 = _mm_load_si128((const __m128i ) (data + 38));
	2633	+ row4 = _mm_load_si128((const __m128i ) (data + 48));
	2634	+ row5 = _mm_load_si128((const __m128i ) (data + 58));
	2635	+ row6 = _mm_load_si128((const __m128i ) (data + 68));
	2636	+ row7 = _mm_load_si128((const __m128i ) (data + 78));
	2637	+
	2638	+ // column pass
	2639	+ dct_pass(bias_0, 10);
	2640	+
	2641	+ {
	2642	+ // 16bit 8x8 transpose pass 1
	2643	+ dct_interleave16(row0, row4);
	2644	+ dct_interleave16(row1, row5);
	2645	+ dct_interleave16(row2, row6);
	2646	+ dct_interleave16(row3, row7);
	2647	+
	2648	+ // transpose pass 2
	2649	+ dct_interleave16(row0, row2);
	2650	+ dct_interleave16(row1, row3);
	2651	+ dct_interleave16(row4, row6);
	2652	+ dct_interleave16(row5, row7);
	2653	+
	2654	+ // transpose pass 3
	2655	+ dct_interleave16(row0, row1);
	2656	+ dct_interleave16(row2, row3);
	2657	+ dct_interleave16(row4, row5);
	2658	+ dct_interleave16(row6, row7);
	2659	+ }
	2660	+
	2661	+ // row pass
	2662	+ dct_pass(bias_1, 17);
	2663	+
	2664	+ {
	2665	+ // pack
	2666	+ __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
	2667	+ __m128i p1 = _mm_packus_epi16(row2, row3);
	2668	+ __m128i p2 = _mm_packus_epi16(row4, row5);
	2669	+ __m128i p3 = _mm_packus_epi16(row6, row7);
	2670	+
	2671	+ // 8bit 8x8 transpose pass 1
	2672	+ dct_interleave8(p0, p2); // a0e0a1e1...
	2673	+ dct_interleave8(p1, p3); // c0g0c1g1...
	2674	+
	2675	+ // transpose pass 2
	2676	+ dct_interleave8(p0, p1); // a0c0e0g0...
	2677	+ dct_interleave8(p2, p3); // b0d0f0h0...
	2678	+
	2679	+ // transpose pass 3
	2680	+ dct_interleave8(p0, p2); // a0b0c0d0...
	2681	+ dct_interleave8(p1, p3); // a4b4c4d4...
	2682	+
	2683	+ // store
	2684	+ _mm_storel_epi64((__m128i *) out, p0); out += out_stride;
	2685	+ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride;
	2686	+ _mm_storel_epi64((__m128i *) out, p2); out += out_stride;
	2687	+ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride;
	2688	+ _mm_storel_epi64((__m128i *) out, p1); out += out_stride;
	2689	+ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride;
	2690	+ _mm_storel_epi64((__m128i *) out, p3); out += out_stride;
	2691	+ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e));
	2692	+ }
	2693	+
	2694	+#undef dct_const
	2695	+#undef dct_rot
	2696	+#undef dct_widen
	2697	+#undef dct_wadd
	2698	+#undef dct_wsub
	2699	+#undef dct_bfly32o
	2700	+#undef dct_interleave8
	2701	+#undef dct_interleave16
	2702	+#undef dct_pass
	2703	+}
	2704	+
	2705	+#endif // STBI_SSE2
	2706	+
	2707	+#ifdef STBI_NEON
	2708	+
	2709	+// NEON integer IDCT. should produce bit-identical
	2710	+// results to the generic C version.
	2711	+static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
	2712	+{
	2713	+ int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
	2714	+
	2715	+ int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
	2716	+ int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
	2717	+ int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f));
	2718	+ int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f));
	2719	+ int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
	2720	+ int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
	2721	+ int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
	2722	+ int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
	2723	+ int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f));
	2724	+ int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f));
	2725	+ int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f));
	2726	+ int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f));
	2727	+
	2728	+#define dct_long_mul(out, inq, coeff) \
	2729	+ int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \
	2730	+ int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
	2731	+
	2732	+#define dct_long_mac(out, acc, inq, coeff) \
	2733	+ int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \
	2734	+ int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
	2735	+
	2736	+#define dct_widen(out, inq) \
	2737	+ int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \
	2738	+ int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
	2739	+
	2740	+// wide add
	2741	+#define dct_wadd(out, a, b) \
	2742	+ int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \
	2743	+ int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
	2744	+
	2745	+// wide sub
	2746	+#define dct_wsub(out, a, b) \
	2747	+ int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \
	2748	+ int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
	2749	+
	2750	+// butterfly a/b, then shift using "shiftop" by "s" and pack
	2751	+#define dct_bfly32o(out0,out1, a,b,shiftop,s) \
	2752	+ { \
	2753	+ dct_wadd(sum, a, b); \
	2754	+ dct_wsub(dif, a, b); \
	2755	+ out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \
	2756	+ out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \
	2757	+ }
	2758	+
	2759	+#define dct_pass(shiftop, shift) \
	2760	+ { \
	2761	+ /* even part */ \
	2762	+ int16x8_t sum26 = vaddq_s16(row2, row6); \
	2763	+ dct_long_mul(p1e, sum26, rot0_0); \
	2764	+ dct_long_mac(t2e, p1e, row6, rot0_1); \
	2765	+ dct_long_mac(t3e, p1e, row2, rot0_2); \
	2766	+ int16x8_t sum04 = vaddq_s16(row0, row4); \
	2767	+ int16x8_t dif04 = vsubq_s16(row0, row4); \
	2768	+ dct_widen(t0e, sum04); \
	2769	+ dct_widen(t1e, dif04); \
	2770	+ dct_wadd(x0, t0e, t3e); \
	2771	+ dct_wsub(x3, t0e, t3e); \
	2772	+ dct_wadd(x1, t1e, t2e); \
	2773	+ dct_wsub(x2, t1e, t2e); \
	2774	+ /* odd part */ \
	2775	+ int16x8_t sum15 = vaddq_s16(row1, row5); \
	2776	+ int16x8_t sum17 = vaddq_s16(row1, row7); \
	2777	+ int16x8_t sum35 = vaddq_s16(row3, row5); \
	2778	+ int16x8_t sum37 = vaddq_s16(row3, row7); \
	2779	+ int16x8_t sumodd = vaddq_s16(sum17, sum35); \
	2780	+ dct_long_mul(p5o, sumodd, rot1_0); \
	2781	+ dct_long_mac(p1o, p5o, sum17, rot1_1); \
	2782	+ dct_long_mac(p2o, p5o, sum35, rot1_2); \
	2783	+ dct_long_mul(p3o, sum37, rot2_0); \
	2784	+ dct_long_mul(p4o, sum15, rot2_1); \
	2785	+ dct_wadd(sump13o, p1o, p3o); \
	2786	+ dct_wadd(sump24o, p2o, p4o); \
	2787	+ dct_wadd(sump23o, p2o, p3o); \
	2788	+ dct_wadd(sump14o, p1o, p4o); \
	2789	+ dct_long_mac(x4, sump13o, row7, rot3_0); \
	2790	+ dct_long_mac(x5, sump24o, row5, rot3_1); \
	2791	+ dct_long_mac(x6, sump23o, row3, rot3_2); \
	2792	+ dct_long_mac(x7, sump14o, row1, rot3_3); \
	2793	+ dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \
	2794	+ dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \
	2795	+ dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \
	2796	+ dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \
	2797	+ }
	2798	+
	2799	+ // load
	2800	+ row0 = vld1q_s16(data + 0*8);
	2801	+ row1 = vld1q_s16(data + 1*8);
	2802	+ row2 = vld1q_s16(data + 2*8);
	2803	+ row3 = vld1q_s16(data + 3*8);
	2804	+ row4 = vld1q_s16(data + 4*8);
	2805	+ row5 = vld1q_s16(data + 5*8);
	2806	+ row6 = vld1q_s16(data + 6*8);
	2807	+ row7 = vld1q_s16(data + 7*8);
	2808	+
	2809	+ // add DC bias
	2810	+ row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
	2811	+
	2812	+ // column pass
	2813	+ dct_pass(vrshrn_n_s32, 10);
	2814	+
	2815	+ // 16bit 8x8 transpose
	2816	+ {
	2817	+// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
	2818	+// whether compilers actually get this is another story, sadly.
	2819	+#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; }
	2820	+#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); }
	2821	+#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); }
	2822	+
	2823	+ // pass 1
	2824	+ dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
	2825	+ dct_trn16(row2, row3);
	2826	+ dct_trn16(row4, row5);
	2827	+ dct_trn16(row6, row7);
	2828	+
	2829	+ // pass 2
	2830	+ dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
	2831	+ dct_trn32(row1, row3);
	2832	+ dct_trn32(row4, row6);
	2833	+ dct_trn32(row5, row7);
	2834	+
	2835	+ // pass 3
	2836	+ dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
	2837	+ dct_trn64(row1, row5);
	2838	+ dct_trn64(row2, row6);
	2839	+ dct_trn64(row3, row7);
	2840	+
	2841	+#undef dct_trn16
	2842	+#undef dct_trn32
	2843	+#undef dct_trn64
	2844	+ }
	2845	+
	2846	+ // row pass
	2847	+ // vrshrn_n_s32 only supports shifts up to 16, we need
	2848	+ // 17. so do a non-rounding shift of 16 first then follow
	2849	+ // up with a rounding shift by 1.
	2850	+ dct_pass(vshrn_n_s32, 16);
	2851	+
	2852	+ {
	2853	+ // pack and round
	2854	+ uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
	2855	+ uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
	2856	+ uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
	2857	+ uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
	2858	+ uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
	2859	+ uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
	2860	+ uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
	2861	+ uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
	2862	+
	2863	+ // again, these can translate into one instruction, but often don't.
	2864	+#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; }
	2865	+#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); }
	2866	+#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); }
	2867	+
	2868	+ // sadly can't use interleaved stores here since we only write
	2869	+ // 8 bytes to each scan line!
	2870	+
	2871	+ // 8x8 8-bit transpose pass 1
	2872	+ dct_trn8_8(p0, p1);
	2873	+ dct_trn8_8(p2, p3);
	2874	+ dct_trn8_8(p4, p5);
	2875	+ dct_trn8_8(p6, p7);
	2876	+
	2877	+ // pass 2
	2878	+ dct_trn8_16(p0, p2);
	2879	+ dct_trn8_16(p1, p3);
	2880	+ dct_trn8_16(p4, p6);
	2881	+ dct_trn8_16(p5, p7);
	2882	+
	2883	+ // pass 3
	2884	+ dct_trn8_32(p0, p4);
	2885	+ dct_trn8_32(p1, p5);
	2886	+ dct_trn8_32(p2, p6);
	2887	+ dct_trn8_32(p3, p7);
	2888	+
	2889	+ // store
	2890	+ vst1_u8(out, p0); out += out_stride;
	2891	+ vst1_u8(out, p1); out += out_stride;
	2892	+ vst1_u8(out, p2); out += out_stride;
	2893	+ vst1_u8(out, p3); out += out_stride;
	2894	+ vst1_u8(out, p4); out += out_stride;
	2895	+ vst1_u8(out, p5); out += out_stride;
	2896	+ vst1_u8(out, p6); out += out_stride;
	2897	+ vst1_u8(out, p7);
	2898	+
	2899	+#undef dct_trn8_8
	2900	+#undef dct_trn8_16
	2901	+#undef dct_trn8_32
	2902	+ }
	2903	+
	2904	+#undef dct_long_mul
	2905	+#undef dct_long_mac
	2906	+#undef dct_widen
	2907	+#undef dct_wadd
	2908	+#undef dct_wsub
	2909	+#undef dct_bfly32o
	2910	+#undef dct_pass
	2911	+}
	2912	+
	2913	+#endif // STBI_NEON
	2914	+
	2915	+#define STBI__MARKER_none 0xff
	2916	+// if there's a pending marker from the entropy stream, return that
	2917	+// otherwise, fetch from the stream and get a marker. if there's no
	2918	+// marker, return 0xff, which is never a valid marker value
	2919	+static stbi_uc stbi__get_marker(stbi__jpeg *j)
	2920	+{
	2921	+ stbi_uc x;
	2922	+ if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
	2923	+ x = stbi__get8(j->s);
	2924	+ if (x != 0xff) return STBI__MARKER_none;
	2925	+ while (x == 0xff)
	2926	+ x = stbi__get8(j->s); // consume repeated 0xff fill bytes
	2927	+ return x;
	2928	+}
	2929	+
	2930	+// in each scan, we'll have scan_n components, and the order
	2931	+// of the components is specified by order[]
	2932	+#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
	2933	+
	2934	+// after a restart interval, stbi__jpeg_reset the entropy decoder and
	2935	+// the dc prediction
	2936	+static void stbi__jpeg_reset(stbi__jpeg *j)
	2937	+{
	2938	+ j->code_bits = 0;
	2939	+ j->code_buffer = 0;
	2940	+ j->nomore = 0;
	2941	+ j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
	2942	+ j->marker = STBI__MARKER_none;
	2943	+ j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
	2944	+ j->eob_run = 0;
	2945	+ // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
	2946	+ // since we don't even allow 1<<30 pixels
	2947	+}
	2948	+
	2949	+static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
	2950	+{
	2951	+ stbi__jpeg_reset(z);
	2952	+ if (!z->progressive) {
	2953	+ if (z->scan_n == 1) {
	2954	+ int i,j;
	2955	+ STBI_SIMD_ALIGN(short, data[64]);
	2956	+ int n = z->order[0];
	2957	+ // non-interleaved data, we just need to process one block at a time,
	2958	+ // in trivial scanline order
	2959	+ // number of blocks to do just depends on how many actual "pixels" this
	2960	+ // component has, independent of interleaved MCU blocking and such
	2961	+ int w = (z->img_comp[n].x+7) >> 3;
	2962	+ int h = (z->img_comp[n].y+7) >> 3;
	2963	+ for (j=0; j < h; ++j) {
	2964	+ for (i=0; i < w; ++i) {
	2965	+ int ha = z->img_comp[n].ha;
	2966	+ if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
	2967	+ z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2j8+i*8, z->img_comp[n].w2, data);
	2968	+ // every data block is an MCU, so countdown the restart interval
	2969	+ if (--z->todo <= 0) {
	2970	+ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
	2971	+ // if it's NOT a restart, then just bail, so we get corrupt data
	2972	+ // rather than no data
	2973	+ if (!STBI__RESTART(z->marker)) return 1;
	2974	+ stbi__jpeg_reset(z);
	2975	+ }
	2976	+ }
	2977	+ }
	2978	+ return 1;
	2979	+ } else { // interleaved
	2980	+ int i,j,k,x,y;
	2981	+ STBI_SIMD_ALIGN(short, data[64]);
	2982	+ for (j=0; j < z->img_mcu_y; ++j) {
	2983	+ for (i=0; i < z->img_mcu_x; ++i) {
	2984	+ // scan an interleaved mcu... process scan_n components in order
	2985	+ for (k=0; k < z->scan_n; ++k) {
	2986	+ int n = z->order[k];
	2987	+ // scan out an mcu's worth of this component; that's just determined
	2988	+ // by the basic H and V specified for the component
	2989	+ for (y=0; y < z->img_comp[n].v; ++y) {
	2990	+ for (x=0; x < z->img_comp[n].h; ++x) {
	2991	+ int x2 = (iz->img_comp[n].h + x)8;
	2992	+ int y2 = (jz->img_comp[n].v + y)8;
	2993	+ int ha = z->img_comp[n].ha;
	2994	+ if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
	2995	+ z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data);
	2996	+ }
	2997	+ }
	2998	+ }
	2999	+ // after all interleaved components, that's an interleaved MCU,
	3000	+ // so now count down the restart interval
	3001	+ if (--z->todo <= 0) {
	3002	+ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
	3003	+ if (!STBI__RESTART(z->marker)) return 1;
	3004	+ stbi__jpeg_reset(z);
	3005	+ }
	3006	+ }
	3007	+ }
	3008	+ return 1;
	3009	+ }
	3010	+ } else {
	3011	+ if (z->scan_n == 1) {
	3012	+ int i,j;
	3013	+ int n = z->order[0];
	3014	+ // non-interleaved data, we just need to process one block at a time,
	3015	+ // in trivial scanline order
	3016	+ // number of blocks to do just depends on how many actual "pixels" this
	3017	+ // component has, independent of interleaved MCU blocking and such
	3018	+ int w = (z->img_comp[n].x+7) >> 3;
	3019	+ int h = (z->img_comp[n].y+7) >> 3;
	3020	+ for (j=0; j < h; ++j) {
	3021	+ for (i=0; i < w; ++i) {
	3022	+ short data = z->img_comp[n].coeff + 64 (i + j * z->img_comp[n].coeff_w);
	3023	+ if (z->spec_start == 0) {
	3024	+ if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
	3025	+ return 0;
	3026	+ } else {
	3027	+ int ha = z->img_comp[n].ha;
	3028	+ if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
	3029	+ return 0;
	3030	+ }
	3031	+ // every data block is an MCU, so countdown the restart interval
	3032	+ if (--z->todo <= 0) {
	3033	+ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
	3034	+ if (!STBI__RESTART(z->marker)) return 1;
	3035	+ stbi__jpeg_reset(z);
	3036	+ }
	3037	+ }
	3038	+ }
	3039	+ return 1;
	3040	+ } else { // interleaved
	3041	+ int i,j,k,x,y;
	3042	+ for (j=0; j < z->img_mcu_y; ++j) {
	3043	+ for (i=0; i < z->img_mcu_x; ++i) {
	3044	+ // scan an interleaved mcu... process scan_n components in order
	3045	+ for (k=0; k < z->scan_n; ++k) {
	3046	+ int n = z->order[k];
	3047	+ // scan out an mcu's worth of this component; that's just determined
	3048	+ // by the basic H and V specified for the component
	3049	+ for (y=0; y < z->img_comp[n].v; ++y) {
	3050	+ for (x=0; x < z->img_comp[n].h; ++x) {
	3051	+ int x2 = (i*z->img_comp[n].h + x);
	3052	+ int y2 = (j*z->img_comp[n].v + y);
	3053	+ short data = z->img_comp[n].coeff + 64 (x2 + y2 * z->img_comp[n].coeff_w);
	3054	+ if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
	3055	+ return 0;
	3056	+ }
	3057	+ }
	3058	+ }
	3059	+ // after all interleaved components, that's an interleaved MCU,
	3060	+ // so now count down the restart interval
	3061	+ if (--z->todo <= 0) {
	3062	+ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
	3063	+ if (!STBI__RESTART(z->marker)) return 1;
	3064	+ stbi__jpeg_reset(z);
	3065	+ }
	3066	+ }
	3067	+ }
	3068	+ return 1;
	3069	+ }
	3070	+ }
	3071	+}
	3072	+
	3073	+static void stbi__jpeg_dequantize(short data, stbi__uint16 dequant)
	3074	+{
	3075	+ int i;
	3076	+ for (i=0; i < 64; ++i)
	3077	+ data[i] *= dequant[i];
	3078	+}
	3079	+
	3080	+static void stbi__jpeg_finish(stbi__jpeg *z)
	3081	+{
	3082	+ if (z->progressive) {
	3083	+ // dequantize and idct the data
	3084	+ int i,j,n;
	3085	+ for (n=0; n < z->s->img_n; ++n) {
	3086	+ int w = (z->img_comp[n].x+7) >> 3;
	3087	+ int h = (z->img_comp[n].y+7) >> 3;
	3088	+ for (j=0; j < h; ++j) {
	3089	+ for (i=0; i < w; ++i) {
	3090	+ short data = z->img_comp[n].coeff + 64 (i + j * z->img_comp[n].coeff_w);
	3091	+ stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
	3092	+ z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2j8+i*8, z->img_comp[n].w2, data);
	3093	+ }
	3094	+ }
	3095	+ }
	3096	+ }
	3097	+}
	3098	+
	3099	+static int stbi__process_marker(stbi__jpeg *z, int m)
	3100	+{
	3101	+ int L;
	3102	+ switch (m) {
	3103	+ case STBI__MARKER_none: // no marker found
	3104	+ return stbi__err("expected marker","Corrupt JPEG");
	3105	+
	3106	+ case 0xDD: // DRI - specify restart interval
	3107	+ if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
	3108	+ z->restart_interval = stbi__get16be(z->s);
	3109	+ return 1;
	3110	+
	3111	+ case 0xDB: // DQT - define quantization table
	3112	+ L = stbi__get16be(z->s)-2;
	3113	+ while (L > 0) {
	3114	+ int q = stbi__get8(z->s);
	3115	+ int p = q >> 4, sixteen = (p != 0);
	3116	+ int t = q & 15,i;
	3117	+ if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG");
	3118	+ if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
	3119	+
	3120	+ for (i=0; i < 64; ++i)
	3121	+ z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
	3122	+ L -= (sixteen ? 129 : 65);
	3123	+ }
	3124	+ return L==0;
	3125	+
	3126	+ case 0xC4: // DHT - define huffman table
	3127	+ L = stbi__get16be(z->s)-2;
	3128	+ while (L > 0) {
	3129	+ stbi_uc *v;
	3130	+ int sizes[16],i,n=0;
	3131	+ int q = stbi__get8(z->s);
	3132	+ int tc = q >> 4;
	3133	+ int th = q & 15;
	3134	+ if (tc > 1 \|\| th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
	3135	+ for (i=0; i < 16; ++i) {
	3136	+ sizes[i] = stbi__get8(z->s);
	3137	+ n += sizes[i];
	3138	+ }
	3139	+ if(n > 256) return stbi__err("bad DHT header","Corrupt JPEG"); // Loop over i < n would write past end of values!
	3140	+ L -= 17;
	3141	+ if (tc == 0) {
	3142	+ if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
	3143	+ v = z->huff_dc[th].values;
	3144	+ } else {
	3145	+ if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
	3146	+ v = z->huff_ac[th].values;
	3147	+ }
	3148	+ for (i=0; i < n; ++i)
	3149	+ v[i] = stbi__get8(z->s);
	3150	+ if (tc != 0)
	3151	+ stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
	3152	+ L -= n;
	3153	+ }
	3154	+ return L==0;
	3155	+ }
	3156	+
	3157	+ // check for comment block or APP blocks
	3158	+ if ((m >= 0xE0 && m <= 0xEF) \|\| m == 0xFE) {
	3159	+ L = stbi__get16be(z->s);
	3160	+ if (L < 2) {
	3161	+ if (m == 0xFE)
	3162	+ return stbi__err("bad COM len","Corrupt JPEG");
	3163	+ else
	3164	+ return stbi__err("bad APP len","Corrupt JPEG");
	3165	+ }
	3166	+ L -= 2;
	3167	+
	3168	+ if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
	3169	+ static const unsigned char tag[5] = {'J','F','I','F','\0'};
	3170	+ int ok = 1;
	3171	+ int i;
	3172	+ for (i=0; i < 5; ++i)
	3173	+ if (stbi__get8(z->s) != tag[i])
	3174	+ ok = 0;
	3175	+ L -= 5;
	3176	+ if (ok)
	3177	+ z->jfif = 1;
	3178	+ } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
	3179	+ static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
	3180	+ int ok = 1;
	3181	+ int i;
	3182	+ for (i=0; i < 6; ++i)
	3183	+ if (stbi__get8(z->s) != tag[i])
	3184	+ ok = 0;
	3185	+ L -= 6;
	3186	+ if (ok) {
	3187	+ stbi__get8(z->s); // version
	3188	+ stbi__get16be(z->s); // flags0
	3189	+ stbi__get16be(z->s); // flags1
	3190	+ z->app14_color_transform = stbi__get8(z->s); // color transform
	3191	+ L -= 6;
	3192	+ }
	3193	+ }
	3194	+
	3195	+ stbi__skip(z->s, L);
	3196	+ return 1;
	3197	+ }
	3198	+
	3199	+ return stbi__err("unknown marker","Corrupt JPEG");
	3200	+}
	3201	+
	3202	+// after we see SOS
	3203	+static int stbi__process_scan_header(stbi__jpeg *z)
	3204	+{
	3205	+ int i;
	3206	+ int Ls = stbi__get16be(z->s);
	3207	+ z->scan_n = stbi__get8(z->s);
	3208	+ if (z->scan_n < 1 \|\| z->scan_n > 4 \|\| z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG");
	3209	+ if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG");
	3210	+ for (i=0; i < z->scan_n; ++i) {
	3211	+ int id = stbi__get8(z->s), which;
	3212	+ int q = stbi__get8(z->s);
	3213	+ for (which = 0; which < z->s->img_n; ++which)
	3214	+ if (z->img_comp[which].id == id)
	3215	+ break;
	3216	+ if (which == z->s->img_n) return 0; // no match
	3217	+ z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
	3218	+ z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
	3219	+ z->order[i] = which;
	3220	+ }
	3221	+
	3222	+ {
	3223	+ int aa;
	3224	+ z->spec_start = stbi__get8(z->s);
	3225	+ z->spec_end = stbi__get8(z->s); // should be 63, but might be 0
	3226	+ aa = stbi__get8(z->s);
	3227	+ z->succ_high = (aa >> 4);
	3228	+ z->succ_low = (aa & 15);
	3229	+ if (z->progressive) {
	3230	+ if (z->spec_start > 63 \|\| z->spec_end > 63 \|\| z->spec_start > z->spec_end \|\| z->succ_high > 13 \|\| z->succ_low > 13)
	3231	+ return stbi__err("bad SOS", "Corrupt JPEG");
	3232	+ } else {
	3233	+ if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG");
	3234	+ if (z->succ_high != 0 \|\| z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG");
	3235	+ z->spec_end = 63;
	3236	+ }
	3237	+ }
	3238	+
	3239	+ return 1;
	3240	+}
	3241	+
	3242	+static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why)
	3243	+{
	3244	+ int i;
	3245	+ for (i=0; i < ncomp; ++i) {
	3246	+ if (z->img_comp[i].raw_data) {
	3247	+ STBI_FREE(z->img_comp[i].raw_data);
	3248	+ z->img_comp[i].raw_data = NULL;
	3249	+ z->img_comp[i].data = NULL;
	3250	+ }
	3251	+ if (z->img_comp[i].raw_coeff) {
	3252	+ STBI_FREE(z->img_comp[i].raw_coeff);
	3253	+ z->img_comp[i].raw_coeff = 0;
	3254	+ z->img_comp[i].coeff = 0;
	3255	+ }
	3256	+ if (z->img_comp[i].linebuf) {
	3257	+ STBI_FREE(z->img_comp[i].linebuf);
	3258	+ z->img_comp[i].linebuf = NULL;
	3259	+ }
	3260	+ }
	3261	+ return why;
	3262	+}
	3263	+
	3264	+static int stbi__process_frame_header(stbi__jpeg *z, int scan)
	3265	+{
	3266	+ stbi__context *s = z->s;
	3267	+ int Lf,p,i,q, h_max=1,v_max=1,c;
	3268	+ Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG
	3269	+ p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
	3270	+ s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
	3271	+ s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
	3272	+ if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
	3273	+ if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
	3274	+ c = stbi__get8(s);
	3275	+ if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG");
	3276	+ s->img_n = c;
	3277	+ for (i=0; i < c; ++i) {
	3278	+ z->img_comp[i].data = NULL;
	3279	+ z->img_comp[i].linebuf = NULL;
	3280	+ }
	3281	+
	3282	+ if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG");
	3283	+
	3284	+ z->rgb = 0;
	3285	+ for (i=0; i < s->img_n; ++i) {
	3286	+ static const unsigned char rgb[3] = { 'R', 'G', 'B' };
	3287	+ z->img_comp[i].id = stbi__get8(s);
	3288	+ if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
	3289	+ ++z->rgb;
	3290	+ q = stbi__get8(s);
	3291	+ z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h \|\| z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
	3292	+ z->img_comp[i].v = q & 15; if (!z->img_comp[i].v \|\| z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
	3293	+ z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
	3294	+ }
	3295	+
	3296	+ if (scan != STBI__SCAN_load) return 1;
	3297	+
	3298	+ if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode");
	3299	+
	3300	+ for (i=0; i < s->img_n; ++i) {
	3301	+ if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
	3302	+ if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
	3303	+ }
	3304	+
	3305	+ // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios
	3306	+ // and I've never seen a non-corrupted JPEG file actually use them
	3307	+ for (i=0; i < s->img_n; ++i) {
	3308	+ if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG");
	3309	+ if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG");
	3310	+ }
	3311	+
	3312	+ // compute interleaved mcu info
	3313	+ z->img_h_max = h_max;
	3314	+ z->img_v_max = v_max;
	3315	+ z->img_mcu_w = h_max * 8;
	3316	+ z->img_mcu_h = v_max * 8;
	3317	+ // these sizes can't be more than 17 bits
	3318	+ z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
	3319	+ z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
	3320	+
	3321	+ for (i=0; i < s->img_n; ++i) {
	3322	+ // number of effective pixels (e.g. for non-interleaved MCU)
	3323	+ z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
	3324	+ z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
	3325	+ // to simplify generation, we'll allocate enough memory to decode
	3326	+ // the bogus oversized data from using interleaved MCUs and their
	3327	+ // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
	3328	+ // discard the extra data until colorspace conversion
	3329	+ //
	3330	+ // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier)
	3331	+ // so these muls can't overflow with 32-bit ints (which we require)
	3332	+ z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
	3333	+ z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
	3334	+ z->img_comp[i].coeff = 0;
	3335	+ z->img_comp[i].raw_coeff = 0;
	3336	+ z->img_comp[i].linebuf = NULL;
	3337	+ z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
	3338	+ if (z->img_comp[i].raw_data == NULL)
	3339	+ return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
	3340	+ // align blocks for idct using mmx/sse
	3341	+ z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
	3342	+ if (z->progressive) {
	3343	+ // w2, h2 are multiples of 8 (see above)
	3344	+ z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
	3345	+ z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
	3346	+ z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
	3347	+ if (z->img_comp[i].raw_coeff == NULL)
	3348	+ return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
	3349	+ z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15);
	3350	+ }
	3351	+ }
	3352	+
	3353	+ return 1;
	3354	+}
	3355	+
	3356	+// use comparisons since in some cases we handle more than one case (e.g. SOF)
	3357	+#define stbi__DNL(x) ((x) == 0xdc)
	3358	+#define stbi__SOI(x) ((x) == 0xd8)
	3359	+#define stbi__EOI(x) ((x) == 0xd9)
	3360	+#define stbi__SOF(x) ((x) == 0xc0 \|\| (x) == 0xc1 \|\| (x) == 0xc2)
	3361	+#define stbi__SOS(x) ((x) == 0xda)
	3362	+
	3363	+#define stbi__SOF_progressive(x) ((x) == 0xc2)
	3364	+
	3365	+static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
	3366	+{
	3367	+ int m;
	3368	+ z->jfif = 0;
	3369	+ z->app14_color_transform = -1; // valid values are 0,1,2
	3370	+ z->marker = STBI__MARKER_none; // initialize cached marker to empty
	3371	+ m = stbi__get_marker(z);
	3372	+ if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
	3373	+ if (scan == STBI__SCAN_type) return 1;
	3374	+ m = stbi__get_marker(z);
	3375	+ while (!stbi__SOF(m)) {
	3376	+ if (!stbi__process_marker(z,m)) return 0;
	3377	+ m = stbi__get_marker(z);
	3378	+ while (m == STBI__MARKER_none) {
	3379	+ // some files have extra padding after their blocks, so ok, we'll scan
	3380	+ if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG");
	3381	+ m = stbi__get_marker(z);
	3382	+ }
	3383	+ }
	3384	+ z->progressive = stbi__SOF_progressive(m);
	3385	+ if (!stbi__process_frame_header(z, scan)) return 0;
	3386	+ return 1;
	3387	+}
	3388	+
	3389	+static stbi_uc stbi__skip_jpeg_junk_at_end(stbi__jpeg *j)
	3390	+{
	3391	+ // some JPEGs have junk at end, skip over it but if we find what looks
	3392	+ // like a valid marker, resume there
	3393	+ while (!stbi__at_eof(j->s)) {
	3394	+ stbi_uc x = stbi__get8(j->s);
	3395	+ while (x == 0xff) { // might be a marker
	3396	+ if (stbi__at_eof(j->s)) return STBI__MARKER_none;
	3397	+ x = stbi__get8(j->s);
	3398	+ if (x != 0x00 && x != 0xff) {
	3399	+ // not a stuffed zero or lead-in to another marker, looks
	3400	+ // like an actual marker, return it
	3401	+ return x;
	3402	+ }
	3403	+ // stuffed zero has x=0 now which ends the loop, meaning we go
	3404	+ // back to regular scan loop.
	3405	+ // repeated 0xff keeps trying to read the next byte of the marker.
	3406	+ }
	3407	+ }
	3408	+ return STBI__MARKER_none;
	3409	+}
	3410	+
	3411	+// decode image to YCbCr format
	3412	+static int stbi__decode_jpeg_image(stbi__jpeg *j)
	3413	+{
	3414	+ int m;
	3415	+ for (m = 0; m < 4; m++) {
	3416	+ j->img_comp[m].raw_data = NULL;
	3417	+ j->img_comp[m].raw_coeff = NULL;
	3418	+ }
	3419	+ j->restart_interval = 0;
	3420	+ if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0;
	3421	+ m = stbi__get_marker(j);
	3422	+ while (!stbi__EOI(m)) {
	3423	+ if (stbi__SOS(m)) {
	3424	+ if (!stbi__process_scan_header(j)) return 0;
	3425	+ if (!stbi__parse_entropy_coded_data(j)) return 0;
	3426	+ if (j->marker == STBI__MARKER_none ) {
	3427	+ j->marker = stbi__skip_jpeg_junk_at_end(j);
	3428	+ // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
	3429	+ }
	3430	+ m = stbi__get_marker(j);
	3431	+ if (STBI__RESTART(m))
	3432	+ m = stbi__get_marker(j);
	3433	+ } else if (stbi__DNL(m)) {
	3434	+ int Ld = stbi__get16be(j->s);
	3435	+ stbi__uint32 NL = stbi__get16be(j->s);
	3436	+ if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG");
	3437	+ if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG");
	3438	+ m = stbi__get_marker(j);
	3439	+ } else {
	3440	+ if (!stbi__process_marker(j, m)) return 1;
	3441	+ m = stbi__get_marker(j);
	3442	+ }
	3443	+ }
	3444	+ if (j->progressive)
	3445	+ stbi__jpeg_finish(j);
	3446	+ return 1;
	3447	+}
	3448	+
	3449	+// static jfif-centered resampling (across block boundaries)
	3450	+
	3451	+typedef stbi_uc (resample_row_func)(stbi_uc out, stbi_uc in0, stbi_uc *in1,
	3452	+ int w, int hs);
	3453	+
	3454	+#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
	3455	+
	3456	+static stbi_uc resample_row_1(stbi_uc out, stbi_uc in_near, stbi_uc in_far, int w, int hs)
	3457	+{
	3458	+ STBI_NOTUSED(out);
	3459	+ STBI_NOTUSED(in_far);
	3460	+ STBI_NOTUSED(w);
	3461	+ STBI_NOTUSED(hs);
	3462	+ return in_near;
	3463	+}
	3464	+
	3465	+static stbi_uc* stbi__resample_row_v_2(stbi_uc out, stbi_uc in_near, stbi_uc *in_far, int w, int hs)
	3466	+{
	3467	+ // need to generate two samples vertically for every one in input
	3468	+ int i;
	3469	+ STBI_NOTUSED(hs);
	3470	+ for (i=0; i < w; ++i)
	3471	+ out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
	3472	+ return out;
	3473	+}
	3474	+
	3475	+static stbi_uc* stbi__resample_row_h_2(stbi_uc out, stbi_uc in_near, stbi_uc *in_far, int w, int hs)
	3476	+{
	3477	+ // need to generate two samples horizontally for every one in input
	3478	+ int i;
	3479	+ stbi_uc *input = in_near;
	3480	+
	3481	+ if (w == 1) {
	3482	+ // if only one sample, can't do any interpolation
	3483	+ out[0] = out[1] = input[0];
	3484	+ return out;
	3485	+ }
	3486	+
	3487	+ out[0] = input[0];
	3488	+ out[1] = stbi__div4(input[0]*3 + input[1] + 2);
	3489	+ for (i=1; i < w-1; ++i) {
	3490	+ int n = 3*input[i]+2;
	3491	+ out[i*2+0] = stbi__div4(n+input[i-1]);
	3492	+ out[i*2+1] = stbi__div4(n+input[i+1]);
	3493	+ }
	3494	+ out[i2+0] = stbi__div4(input[w-2]3 + input[w-1] + 2);
	3495	+ out[i*2+1] = input[w-1];
	3496	+
	3497	+ STBI_NOTUSED(in_far);
	3498	+ STBI_NOTUSED(hs);
	3499	+
	3500	+ return out;
	3501	+}
	3502	+
	3503	+#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
	3504	+
	3505	+static stbi_uc stbi__resample_row_hv_2(stbi_uc out, stbi_uc in_near, stbi_uc in_far, int w, int hs)
	3506	+{
	3507	+ // need to generate 2x2 samples for every one in input
	3508	+ int i,t0,t1;
	3509	+ if (w == 1) {
	3510	+ out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
	3511	+ return out;
	3512	+ }
	3513	+
	3514	+ t1 = 3*in_near[0] + in_far[0];
	3515	+ out[0] = stbi__div4(t1+2);
	3516	+ for (i=1; i < w; ++i) {
	3517	+ t0 = t1;
	3518	+ t1 = 3*in_near[i]+in_far[i];
	3519	+ out[i2-1] = stbi__div16(3t0 + t1 + 8);
	3520	+ out[i2 ] = stbi__div16(3t1 + t0 + 8);
	3521	+ }
	3522	+ out[w*2-1] = stbi__div4(t1+2);
	3523	+
	3524	+ STBI_NOTUSED(hs);
	3525	+
	3526	+ return out;
	3527	+}
	3528	+
	3529	+#if defined(STBI_SSE2) \|\| defined(STBI_NEON)
	3530	+static stbi_uc stbi__resample_row_hv_2_simd(stbi_uc out, stbi_uc in_near, stbi_uc in_far, int w, int hs)
	3531	+{
	3532	+ // need to generate 2x2 samples for every one in input
	3533	+ int i=0,t0,t1;
	3534	+
	3535	+ if (w == 1) {
	3536	+ out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
	3537	+ return out;
	3538	+ }
	3539	+
	3540	+ t1 = 3*in_near[0] + in_far[0];
	3541	+ // process groups of 8 pixels for as long as we can.
	3542	+ // note we can't handle the last pixel in a row in this loop
	3543	+ // because we need to handle the filter boundary conditions.
	3544	+ for (; i < ((w-1) & ~7); i += 8) {
	3545	+#if defined(STBI_SSE2)
	3546	+ // load and perform the vertical filtering pass
	3547	+ // this uses 3x + y = 4x + (y - x)
	3548	+ __m128i zero = _mm_setzero_si128();
	3549	+ __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i));
	3550	+ __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i));
	3551	+ __m128i farw = _mm_unpacklo_epi8(farb, zero);
	3552	+ __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
	3553	+ __m128i diff = _mm_sub_epi16(farw, nearw);
	3554	+ __m128i nears = _mm_slli_epi16(nearw, 2);
	3555	+ __m128i curr = _mm_add_epi16(nears, diff); // current row
	3556	+
	3557	+ // horizontal filter works the same based on shifted vers of current
	3558	+ // row. "prev" is current row shifted right by 1 pixel; we need to
	3559	+ // insert the previous pixel value (from t1).
	3560	+ // "next" is current row shifted left by 1 pixel, with first pixel
	3561	+ // of next block of 8 pixels added in.
	3562	+ __m128i prv0 = _mm_slli_si128(curr, 2);
	3563	+ __m128i nxt0 = _mm_srli_si128(curr, 2);
	3564	+ __m128i prev = _mm_insert_epi16(prv0, t1, 0);
	3565	+ __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7);
	3566	+
	3567	+ // horizontal filter, polyphase implementation since it's convenient:
	3568	+ // even pixels = 3cur + prev = cur4 + (prev - cur)
	3569	+ // odd pixels = 3cur + next = cur4 + (next - cur)
	3570	+ // note the shared term.
	3571	+ __m128i bias = _mm_set1_epi16(8);
	3572	+ __m128i curs = _mm_slli_epi16(curr, 2);
	3573	+ __m128i prvd = _mm_sub_epi16(prev, curr);
	3574	+ __m128i nxtd = _mm_sub_epi16(next, curr);
	3575	+ __m128i curb = _mm_add_epi16(curs, bias);
	3576	+ __m128i even = _mm_add_epi16(prvd, curb);
	3577	+ __m128i odd = _mm_add_epi16(nxtd, curb);
	3578	+
	3579	+ // interleave even and odd pixels, then undo scaling.
	3580	+ __m128i int0 = _mm_unpacklo_epi16(even, odd);
	3581	+ __m128i int1 = _mm_unpackhi_epi16(even, odd);
	3582	+ __m128i de0 = _mm_srli_epi16(int0, 4);
	3583	+ __m128i de1 = _mm_srli_epi16(int1, 4);
	3584	+
	3585	+ // pack and write output
	3586	+ __m128i outv = _mm_packus_epi16(de0, de1);
	3587	+ _mm_storeu_si128((__m128i ) (out + i2), outv);
	3588	+#elif defined(STBI_NEON)
	3589	+ // load and perform the vertical filtering pass
	3590	+ // this uses 3x + y = 4x + (y - x)
	3591	+ uint8x8_t farb = vld1_u8(in_far + i);
	3592	+ uint8x8_t nearb = vld1_u8(in_near + i);
	3593	+ int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
	3594	+ int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
	3595	+ int16x8_t curr = vaddq_s16(nears, diff); // current row
	3596	+
	3597	+ // horizontal filter works the same based on shifted vers of current
	3598	+ // row. "prev" is current row shifted right by 1 pixel; we need to
	3599	+ // insert the previous pixel value (from t1).
	3600	+ // "next" is current row shifted left by 1 pixel, with first pixel
	3601	+ // of next block of 8 pixels added in.
	3602	+ int16x8_t prv0 = vextq_s16(curr, curr, 7);
	3603	+ int16x8_t nxt0 = vextq_s16(curr, curr, 1);
	3604	+ int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
	3605	+ int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7);
	3606	+
	3607	+ // horizontal filter, polyphase implementation since it's convenient:
	3608	+ // even pixels = 3cur + prev = cur4 + (prev - cur)
	3609	+ // odd pixels = 3cur + next = cur4 + (next - cur)
	3610	+ // note the shared term.
	3611	+ int16x8_t curs = vshlq_n_s16(curr, 2);
	3612	+ int16x8_t prvd = vsubq_s16(prev, curr);
	3613	+ int16x8_t nxtd = vsubq_s16(next, curr);
	3614	+ int16x8_t even = vaddq_s16(curs, prvd);
	3615	+ int16x8_t odd = vaddq_s16(curs, nxtd);
	3616	+
	3617	+ // undo scaling and round, then store with even/odd phases interleaved
	3618	+ uint8x8x2_t o;
	3619	+ o.val[0] = vqrshrun_n_s16(even, 4);
	3620	+ o.val[1] = vqrshrun_n_s16(odd, 4);
	3621	+ vst2_u8(out + i*2, o);
	3622	+#endif
	3623	+
	3624	+ // "previous" value for next iter
	3625	+ t1 = 3*in_near[i+7] + in_far[i+7];
	3626	+ }
	3627	+
	3628	+ t0 = t1;
	3629	+ t1 = 3*in_near[i] + in_far[i];
	3630	+ out[i2] = stbi__div16(3t1 + t0 + 8);
	3631	+
	3632	+ for (++i; i < w; ++i) {
	3633	+ t0 = t1;
	3634	+ t1 = 3*in_near[i]+in_far[i];
	3635	+ out[i2-1] = stbi__div16(3t0 + t1 + 8);
	3636	+ out[i2 ] = stbi__div16(3t1 + t0 + 8);
	3637	+ }
	3638	+ out[w*2-1] = stbi__div4(t1+2);
	3639	+
	3640	+ STBI_NOTUSED(hs);
	3641	+
	3642	+ return out;
	3643	+}
	3644	+#endif
	3645	+
	3646	+static stbi_uc stbi__resample_row_generic(stbi_uc out, stbi_uc in_near, stbi_uc in_far, int w, int hs)
	3647	+{
	3648	+ // resample with nearest-neighbor
	3649	+ int i,j;
	3650	+ STBI_NOTUSED(in_far);
	3651	+ for (i=0; i < w; ++i)
	3652	+ for (j=0; j < hs; ++j)
	3653	+ out[i*hs+j] = in_near[i];
	3654	+ return out;
	3655	+}
	3656	+
	3657	+// this is a reduced-precision calculation of YCbCr-to-RGB introduced
	3658	+// to make sure the code produces the same results in both SIMD and scalar
	3659	+#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8)
	3660	+static void stbi__YCbCr_to_RGB_row(stbi_uc out, const stbi_uc y, const stbi_uc pcb, const stbi_uc pcr, int count, int step)
	3661	+{
	3662	+ int i;
	3663	+ for (i=0; i < count; ++i) {
	3664	+ int y_fixed = (y[i] << 20) + (1<<19); // rounding
	3665	+ int r,g,b;
	3666	+ int cr = pcr[i] - 128;
	3667	+ int cb = pcb[i] - 128;
	3668	+ r = y_fixed + cr* stbi__float2fixed(1.40200f);
	3669	+ g = y_fixed + (cr-stbi__float2fixed(0.71414f)) + ((cb-stbi__float2fixed(0.34414f)) & 0xffff0000);
	3670	+ b = y_fixed + cb* stbi__float2fixed(1.77200f);
	3671	+ r >>= 20;
	3672	+ g >>= 20;
	3673	+ b >>= 20;
	3674	+ if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
	3675	+ if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
	3676	+ if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
	3677	+ out[0] = (stbi_uc)r;
	3678	+ out[1] = (stbi_uc)g;
	3679	+ out[2] = (stbi_uc)b;
	3680	+ out[3] = 255;
	3681	+ out += step;
	3682	+ }
	3683	+}
	3684	+
	3685	+#if defined(STBI_SSE2) \|\| defined(STBI_NEON)
	3686	+static void stbi__YCbCr_to_RGB_simd(stbi_uc out, stbi_uc const y, stbi_uc const pcb, stbi_uc const pcr, int count, int step)
	3687	+{
	3688	+ int i = 0;
	3689	+
	3690	+#ifdef STBI_SSE2
	3691	+ // step == 3 is pretty ugly on the final interleave, and i'm not convinced
	3692	+ // it's useful in practice (you wouldn't use it for textures, for example).
	3693	+ // so just accelerate step == 4 case.
	3694	+ if (step == 4) {
	3695	+ // this is a fairly straightforward implementation and not super-optimized.
	3696	+ __m128i signflip = _mm_set1_epi8(-0x80);
	3697	+ __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f));
	3698	+ __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f));
	3699	+ __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f));
	3700	+ __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f));
	3701	+ __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128);
	3702	+ __m128i xw = _mm_set1_epi16(255); // alpha channel
	3703	+
	3704	+ for (; i+7 < count; i += 8) {
	3705	+ // load
	3706	+ __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i));
	3707	+ __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i));
	3708	+ __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i));
	3709	+ __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
	3710	+ __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
	3711	+
	3712	+ // unpack to short (and left-shift cr, cb by 8)
	3713	+ __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes);
	3714	+ __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
	3715	+ __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
	3716	+
	3717	+ // color transform
	3718	+ __m128i yws = _mm_srli_epi16(yw, 4);
	3719	+ __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
	3720	+ __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
	3721	+ __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
	3722	+ __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
	3723	+ __m128i rws = _mm_add_epi16(cr0, yws);
	3724	+ __m128i gwt = _mm_add_epi16(cb0, yws);
	3725	+ __m128i bws = _mm_add_epi16(yws, cb1);
	3726	+ __m128i gws = _mm_add_epi16(gwt, cr1);
	3727	+
	3728	+ // descale
	3729	+ __m128i rw = _mm_srai_epi16(rws, 4);
	3730	+ __m128i bw = _mm_srai_epi16(bws, 4);
	3731	+ __m128i gw = _mm_srai_epi16(gws, 4);
	3732	+
	3733	+ // back to byte, set up for transpose
	3734	+ __m128i brb = _mm_packus_epi16(rw, bw);
	3735	+ __m128i gxb = _mm_packus_epi16(gw, xw);
	3736	+
	3737	+ // transpose to interleave channels
	3738	+ __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
	3739	+ __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
	3740	+ __m128i o0 = _mm_unpacklo_epi16(t0, t1);
	3741	+ __m128i o1 = _mm_unpackhi_epi16(t0, t1);
	3742	+
	3743	+ // store
	3744	+ _mm_storeu_si128((__m128i *) (out + 0), o0);
	3745	+ _mm_storeu_si128((__m128i *) (out + 16), o1);
	3746	+ out += 32;
	3747	+ }
	3748	+ }
	3749	+#endif
	3750	+
	3751	+#ifdef STBI_NEON
	3752	+ // in this version, step=3 support would be easy to add. but is there demand?
	3753	+ if (step == 4) {
	3754	+ // this is a fairly straightforward implementation and not super-optimized.
	3755	+ uint8x8_t signflip = vdup_n_u8(0x80);
	3756	+ int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f));
	3757	+ int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f));
	3758	+ int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f));
	3759	+ int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f));
	3760	+
	3761	+ for (; i+7 < count; i += 8) {
	3762	+ // load
	3763	+ uint8x8_t y_bytes = vld1_u8(y + i);
	3764	+ uint8x8_t cr_bytes = vld1_u8(pcr + i);
	3765	+ uint8x8_t cb_bytes = vld1_u8(pcb + i);
	3766	+ int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
	3767	+ int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
	3768	+
	3769	+ // expand to s16
	3770	+ int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
	3771	+ int16x8_t crw = vshll_n_s8(cr_biased, 7);
	3772	+ int16x8_t cbw = vshll_n_s8(cb_biased, 7);
	3773	+
	3774	+ // color transform
	3775	+ int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
	3776	+ int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
	3777	+ int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
	3778	+ int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
	3779	+ int16x8_t rws = vaddq_s16(yws, cr0);
	3780	+ int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
	3781	+ int16x8_t bws = vaddq_s16(yws, cb1);
	3782	+
	3783	+ // undo scaling, round, convert to byte
	3784	+ uint8x8x4_t o;
	3785	+ o.val[0] = vqrshrun_n_s16(rws, 4);
	3786	+ o.val[1] = vqrshrun_n_s16(gws, 4);
	3787	+ o.val[2] = vqrshrun_n_s16(bws, 4);
	3788	+ o.val[3] = vdup_n_u8(255);
	3789	+
	3790	+ // store, interleaving r/g/b/a
	3791	+ vst4_u8(out, o);
	3792	+ out += 8*4;
	3793	+ }
	3794	+ }
	3795	+#endif
	3796	+
	3797	+ for (; i < count; ++i) {
	3798	+ int y_fixed = (y[i] << 20) + (1<<19); // rounding
	3799	+ int r,g,b;
	3800	+ int cr = pcr[i] - 128;
	3801	+ int cb = pcb[i] - 128;
	3802	+ r = y_fixed + cr* stbi__float2fixed(1.40200f);
	3803	+ g = y_fixed + cr-stbi__float2fixed(0.71414f) + ((cb-stbi__float2fixed(0.34414f)) & 0xffff0000);
	3804	+ b = y_fixed + cb* stbi__float2fixed(1.77200f);
	3805	+ r >>= 20;
	3806	+ g >>= 20;
	3807	+ b >>= 20;
	3808	+ if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
	3809	+ if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
	3810	+ if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
	3811	+ out[0] = (stbi_uc)r;
	3812	+ out[1] = (stbi_uc)g;
	3813	+ out[2] = (stbi_uc)b;
	3814	+ out[3] = 255;
	3815	+ out += step;
	3816	+ }
	3817	+}
	3818	+#endif
	3819	+
	3820	+// set up the kernels
	3821	+static void stbi__setup_jpeg(stbi__jpeg *j)
	3822	+{
	3823	+ j->idct_block_kernel = stbi__idct_block;
	3824	+ j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
	3825	+ j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
	3826	+
	3827	+#ifdef STBI_SSE2
	3828	+ if (stbi__sse2_available()) {
	3829	+ j->idct_block_kernel = stbi__idct_simd;
	3830	+ j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
	3831	+ j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
	3832	+ }
	3833	+#endif
	3834	+
	3835	+#ifdef STBI_NEON
	3836	+ j->idct_block_kernel = stbi__idct_simd;
	3837	+ j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
	3838	+ j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
	3839	+#endif
	3840	+}
	3841	+
	3842	+// clean up the temporary component buffers
	3843	+static void stbi__cleanup_jpeg(stbi__jpeg *j)
	3844	+{
	3845	+ stbi__free_jpeg_components(j, j->s->img_n, 0);
	3846	+}
	3847	+
	3848	+typedef struct
	3849	+{
	3850	+ resample_row_func resample;
	3851	+ stbi_uc line0,line1;
	3852	+ int hs,vs; // expansion factor in each axis
	3853	+ int w_lores; // horizontal pixels pre-expansion
	3854	+ int ystep; // how far through vertical expansion we are
	3855	+ int ypos; // which pre-expansion row we're on
	3856	+} stbi__resample;
	3857	+
	3858	+// fast 0..255 * 0..255 => 0..255 rounded multiplication
	3859	+static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
	3860	+{
	3861	+ unsigned int t = x*y + 128;
	3862	+ return (stbi_uc) ((t + (t >>8)) >> 8);
	3863	+}
	3864	+
	3865	+static stbi_uc load_jpeg_image(stbi__jpeg z, int out_x, int out_y, int *comp, int req_comp)
	3866	+{
	3867	+ int n, decode_n, is_rgb;
	3868	+ z->s->img_n = 0; // make stbi__cleanup_jpeg safe
	3869	+
	3870	+ // validate req_comp
	3871	+ if (req_comp < 0 \|\| req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
	3872	+
	3873	+ // load a jpeg image from whichever source, but leave in YCbCr format
	3874	+ if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
	3875	+
	3876	+ // determine actual number of components to generate
	3877	+ n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
	3878	+
	3879	+ is_rgb = z->s->img_n == 3 && (z->rgb == 3 \|\| (z->app14_color_transform == 0 && !z->jfif));
	3880	+
	3881	+ if (z->s->img_n == 3 && n < 3 && !is_rgb)
	3882	+ decode_n = 1;
	3883	+ else
	3884	+ decode_n = z->s->img_n;
	3885	+
	3886	+ // nothing to do if no components requested; check this now to avoid
	3887	+ // accessing uninitialized coutput[0] later
	3888	+ if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; }
	3889	+
	3890	+ // resample and color-convert
	3891	+ {
	3892	+ int k;
	3893	+ unsigned int i,j;
	3894	+ stbi_uc *output;
	3895	+ stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL };
	3896	+
	3897	+ stbi__resample res_comp[4];
	3898	+
	3899	+ for (k=0; k < decode_n; ++k) {
	3900	+ stbi__resample *r = &res_comp[k];
	3901	+
	3902	+ // allocate line buffer big enough for upsampling off the edges
	3903	+ // with upsample factor of 4
	3904	+ z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3);
	3905	+ if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
	3906	+
	3907	+ r->hs = z->img_h_max / z->img_comp[k].h;
	3908	+ r->vs = z->img_v_max / z->img_comp[k].v;
	3909	+ r->ystep = r->vs >> 1;
	3910	+ r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
	3911	+ r->ypos = 0;
	3912	+ r->line0 = r->line1 = z->img_comp[k].data;
	3913	+
	3914	+ if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
	3915	+ else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
	3916	+ else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
	3917	+ else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel;
	3918	+ else r->resample = stbi__resample_row_generic;
	3919	+ }
	3920	+
	3921	+ // can't error after this so, this is safe
	3922	+ output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
	3923	+ if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
	3924	+
	3925	+ // now go ahead and resample
	3926	+ for (j=0; j < z->s->img_y; ++j) {
	3927	+ stbi_uc out = output + n z->s->img_x * j;
	3928	+ for (k=0; k < decode_n; ++k) {
	3929	+ stbi__resample *r = &res_comp[k];
	3930	+ int y_bot = r->ystep >= (r->vs >> 1);
	3931	+ coutput[k] = r->resample(z->img_comp[k].linebuf,
	3932	+ y_bot ? r->line1 : r->line0,
	3933	+ y_bot ? r->line0 : r->line1,
	3934	+ r->w_lores, r->hs);
	3935	+ if (++r->ystep >= r->vs) {
	3936	+ r->ystep = 0;
	3937	+ r->line0 = r->line1;
	3938	+ if (++r->ypos < z->img_comp[k].y)
	3939	+ r->line1 += z->img_comp[k].w2;
	3940	+ }
	3941	+ }
	3942	+ if (n >= 3) {
	3943	+ stbi_uc *y = coutput[0];
	3944	+ if (z->s->img_n == 3) {
	3945	+ if (is_rgb) {
	3946	+ for (i=0; i < z->s->img_x; ++i) {
	3947	+ out[0] = y[i];
	3948	+ out[1] = coutput[1][i];
	3949	+ out[2] = coutput[2][i];
	3950	+ out[3] = 255;
	3951	+ out += n;
	3952	+ }
	3953	+ } else {
	3954	+ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
	3955	+ }
	3956	+ } else if (z->s->img_n == 4) {
	3957	+ if (z->app14_color_transform == 0) { // CMYK
	3958	+ for (i=0; i < z->s->img_x; ++i) {
	3959	+ stbi_uc m = coutput[3][i];
	3960	+ out[0] = stbi__blinn_8x8(coutput[0][i], m);
	3961	+ out[1] = stbi__blinn_8x8(coutput[1][i], m);
	3962	+ out[2] = stbi__blinn_8x8(coutput[2][i], m);
	3963	+ out[3] = 255;
	3964	+ out += n;
	3965	+ }
	3966	+ } else if (z->app14_color_transform == 2) { // YCCK
	3967	+ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
	3968	+ for (i=0; i < z->s->img_x; ++i) {
	3969	+ stbi_uc m = coutput[3][i];
	3970	+ out[0] = stbi__blinn_8x8(255 - out[0], m);
	3971	+ out[1] = stbi__blinn_8x8(255 - out[1], m);
	3972	+ out[2] = stbi__blinn_8x8(255 - out[2], m);
	3973	+ out += n;
	3974	+ }
	3975	+ } else { // YCbCr + alpha? Ignore the fourth channel for now
	3976	+ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
	3977	+ }
	3978	+ } else
	3979	+ for (i=0; i < z->s->img_x; ++i) {
	3980	+ out[0] = out[1] = out[2] = y[i];
	3981	+ out[3] = 255; // not used if n==3
	3982	+ out += n;
	3983	+ }
	3984	+ } else {
	3985	+ if (is_rgb) {
	3986	+ if (n == 1)
	3987	+ for (i=0; i < z->s->img_x; ++i)
	3988	+ *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
	3989	+ else {
	3990	+ for (i=0; i < z->s->img_x; ++i, out += 2) {
	3991	+ out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
	3992	+ out[1] = 255;
	3993	+ }
	3994	+ }
	3995	+ } else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
	3996	+ for (i=0; i < z->s->img_x; ++i) {
	3997	+ stbi_uc m = coutput[3][i];
	3998	+ stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
	3999	+ stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
	4000	+ stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
	4001	+ out[0] = stbi__compute_y(r, g, b);
	4002	+ out[1] = 255;
	4003	+ out += n;
	4004	+ }
	4005	+ } else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
	4006	+ for (i=0; i < z->s->img_x; ++i) {
	4007	+ out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
	4008	+ out[1] = 255;
	4009	+ out += n;
	4010	+ }
	4011	+ } else {
	4012	+ stbi_uc *y = coutput[0];
	4013	+ if (n == 1)
	4014	+ for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
	4015	+ else
	4016	+ for (i=0; i < z->s->img_x; ++i) { out++ = y[i]; out++ = 255; }
	4017	+ }
	4018	+ }
	4019	+ }
	4020	+ stbi__cleanup_jpeg(z);
	4021	+ *out_x = z->s->img_x;
	4022	+ *out_y = z->s->img_y;
	4023	+ if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
	4024	+ return output;
	4025	+ }
	4026	+}
	4027	+
	4028	+static void stbi__jpeg_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	4029	+{
	4030	+ unsigned char* result;
	4031	+ stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
	4032	+ if (!j) return stbi__errpuc("outofmem", "Out of memory");
	4033	+ memset(j, 0, sizeof(stbi__jpeg));
	4034	+ STBI_NOTUSED(ri);
	4035	+ j->s = s;
	4036	+ stbi__setup_jpeg(j);
	4037	+ result = load_jpeg_image(j, x,y,comp,req_comp);
	4038	+ STBI_FREE(j);
	4039	+ return result;
	4040	+}
	4041	+
	4042	+static int stbi__jpeg_test(stbi__context *s)
	4043	+{
	4044	+ int r;
	4045	+ stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
	4046	+ if (!j) return stbi__err("outofmem", "Out of memory");
	4047	+ memset(j, 0, sizeof(stbi__jpeg));
	4048	+ j->s = s;
	4049	+ stbi__setup_jpeg(j);
	4050	+ r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
	4051	+ stbi__rewind(s);
	4052	+ STBI_FREE(j);
	4053	+ return r;
	4054	+}
	4055	+
	4056	+static int stbi__jpeg_info_raw(stbi__jpeg j, int x, int y, int comp)
	4057	+{
	4058	+ if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
	4059	+ stbi__rewind( j->s );
	4060	+ return 0;
	4061	+ }
	4062	+ if (x) *x = j->s->img_x;
	4063	+ if (y) *y = j->s->img_y;
	4064	+ if (comp) *comp = j->s->img_n >= 3 ? 3 : 1;
	4065	+ return 1;
	4066	+}
	4067	+
	4068	+static int stbi__jpeg_info(stbi__context s, int x, int y, int comp)
	4069	+{
	4070	+ int result;
	4071	+ stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
	4072	+ if (!j) return stbi__err("outofmem", "Out of memory");
	4073	+ memset(j, 0, sizeof(stbi__jpeg));
	4074	+ j->s = s;
	4075	+ result = stbi__jpeg_info_raw(j, x, y, comp);
	4076	+ STBI_FREE(j);
	4077	+ return result;
	4078	+}
	4079	+#endif
	4080	+
	4081	+// public domain zlib decode v0.2 Sean Barrett 2006-11-18
	4082	+// simple implementation
	4083	+// - all input must be provided in an upfront buffer
	4084	+// - all output is written to a single output buffer (can malloc/realloc)
	4085	+// performance
	4086	+// - fast huffman
	4087	+
	4088	+#ifndef STBI_NO_ZLIB
	4089	+
	4090	+// fast-way is faster to check than jpeg huffman, but slow way is slower
	4091	+#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
	4092	+#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
	4093	+#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet
	4094	+
	4095	+// zlib-style huffman encoding
	4096	+// (jpegs packs from left, zlib from right, so can't share code)
	4097	+typedef struct
	4098	+{
	4099	+ stbi__uint16 fast[1 << STBI__ZFAST_BITS];
	4100	+ stbi__uint16 firstcode[16];
	4101	+ int maxcode[17];
	4102	+ stbi__uint16 firstsymbol[16];
	4103	+ stbi_uc size[STBI__ZNSYMS];
	4104	+ stbi__uint16 value[STBI__ZNSYMS];
	4105	+} stbi__zhuffman;
	4106	+
	4107	+stbi_inline static int stbi__bitreverse16(int n)
	4108	+{
	4109	+ n = ((n & 0xAAAA) >> 1) \| ((n & 0x5555) << 1);
	4110	+ n = ((n & 0xCCCC) >> 2) \| ((n & 0x3333) << 2);
	4111	+ n = ((n & 0xF0F0) >> 4) \| ((n & 0x0F0F) << 4);
	4112	+ n = ((n & 0xFF00) >> 8) \| ((n & 0x00FF) << 8);
	4113	+ return n;
	4114	+}
	4115	+
	4116	+stbi_inline static int stbi__bit_reverse(int v, int bits)
	4117	+{
	4118	+ STBI_ASSERT(bits <= 16);
	4119	+ // to bit reverse n bits, reverse 16 and shift
	4120	+ // e.g. 11 bits, bit reverse and shift away 5
	4121	+ return stbi__bitreverse16(v) >> (16-bits);
	4122	+}
	4123	+
	4124	+static int stbi__zbuild_huffman(stbi__zhuffman z, const stbi_uc sizelist, int num)
	4125	+{
	4126	+ int i,k=0;
	4127	+ int code, next_code[16], sizes[17];
	4128	+
	4129	+ // DEFLATE spec for generating codes
	4130	+ memset(sizes, 0, sizeof(sizes));
	4131	+ memset(z->fast, 0, sizeof(z->fast));
	4132	+ for (i=0; i < num; ++i)
	4133	+ ++sizes[sizelist[i]];
	4134	+ sizes[0] = 0;
	4135	+ for (i=1; i < 16; ++i)
	4136	+ if (sizes[i] > (1 << i))
	4137	+ return stbi__err("bad sizes", "Corrupt PNG");
	4138	+ code = 0;
	4139	+ for (i=1; i < 16; ++i) {
	4140	+ next_code[i] = code;
	4141	+ z->firstcode[i] = (stbi__uint16) code;
	4142	+ z->firstsymbol[i] = (stbi__uint16) k;
	4143	+ code = (code + sizes[i]);
	4144	+ if (sizes[i])
	4145	+ if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG");
	4146	+ z->maxcode[i] = code << (16-i); // preshift for inner loop
	4147	+ code <<= 1;
	4148	+ k += sizes[i];
	4149	+ }
	4150	+ z->maxcode[16] = 0x10000; // sentinel
	4151	+ for (i=0; i < num; ++i) {
	4152	+ int s = sizelist[i];
	4153	+ if (s) {
	4154	+ int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
	4155	+ stbi__uint16 fastv = (stbi__uint16) ((s << 9) \| i);
	4156	+ z->size [c] = (stbi_uc ) s;
	4157	+ z->value[c] = (stbi__uint16) i;
	4158	+ if (s <= STBI__ZFAST_BITS) {
	4159	+ int j = stbi__bit_reverse(next_code[s],s);
	4160	+ while (j < (1 << STBI__ZFAST_BITS)) {
	4161	+ z->fast[j] = fastv;
	4162	+ j += (1 << s);
	4163	+ }
	4164	+ }
	4165	+ ++next_code[s];
	4166	+ }
	4167	+ }
	4168	+ return 1;
	4169	+}
	4170	+
	4171	+// zlib-from-memory implementation for PNG reading
	4172	+// because PNG allows splitting the zlib stream arbitrarily,
	4173	+// and it's annoying structurally to have PNG call ZLIB call PNG,
	4174	+// we require PNG read all the IDATs and combine them into a single
	4175	+// memory buffer
	4176	+
	4177	+typedef struct
	4178	+{
	4179	+ stbi_uc zbuffer, zbuffer_end;
	4180	+ int num_bits;
	4181	+ int hit_zeof_once;
	4182	+ stbi__uint32 code_buffer;
	4183	+
	4184	+ char *zout;
	4185	+ char *zout_start;
	4186	+ char *zout_end;
	4187	+ int z_expandable;
	4188	+
	4189	+ stbi__zhuffman z_length, z_distance;
	4190	+} stbi__zbuf;
	4191	+
	4192	+stbi_inline static int stbi__zeof(stbi__zbuf *z)
	4193	+{
	4194	+ return (z->zbuffer >= z->zbuffer_end);
	4195	+}
	4196	+
	4197	+stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
	4198	+{
	4199	+ return stbi__zeof(z) ? 0 : *z->zbuffer++;
	4200	+}
	4201	+
	4202	+static void stbi__fill_bits(stbi__zbuf *z)
	4203	+{
	4204	+ do {
	4205	+ if (z->code_buffer >= (1U << z->num_bits)) {
	4206	+ z->zbuffer = z->zbuffer_end; /* treat this as EOF so we fail. */
	4207	+ return;
	4208	+ }
	4209	+ z->code_buffer \|= (unsigned int) stbi__zget8(z) << z->num_bits;
	4210	+ z->num_bits += 8;
	4211	+ } while (z->num_bits <= 24);
	4212	+}
	4213	+
	4214	+stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
	4215	+{
	4216	+ unsigned int k;
	4217	+ if (z->num_bits < n) stbi__fill_bits(z);
	4218	+ k = z->code_buffer & ((1 << n) - 1);
	4219	+ z->code_buffer >>= n;
	4220	+ z->num_bits -= n;
	4221	+ return k;
	4222	+}
	4223	+
	4224	+static int stbi__zhuffman_decode_slowpath(stbi__zbuf a, stbi__zhuffman z)
	4225	+{
	4226	+ int b,s,k;
	4227	+ // not resolved by fast table, so compute it the slow way
	4228	+ // use jpeg approach, which requires MSbits at top
	4229	+ k = stbi__bit_reverse(a->code_buffer, 16);
	4230	+ for (s=STBI__ZFAST_BITS+1; ; ++s)
	4231	+ if (k < z->maxcode[s])
	4232	+ break;
	4233	+ if (s >= 16) return -1; // invalid code!
	4234	+ // code size is s, so:
	4235	+ b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
	4236	+ if (b >= STBI__ZNSYMS) return -1; // some data was corrupt somewhere!
	4237	+ if (z->size[b] != s) return -1; // was originally an assert, but report failure instead.
	4238	+ a->code_buffer >>= s;
	4239	+ a->num_bits -= s;
	4240	+ return z->value[b];
	4241	+}
	4242	+
	4243	+stbi_inline static int stbi__zhuffman_decode(stbi__zbuf a, stbi__zhuffman z)
	4244	+{
	4245	+ int b,s;
	4246	+ if (a->num_bits < 16) {
	4247	+ if (stbi__zeof(a)) {
	4248	+ if (!a->hit_zeof_once) {
	4249	+ // This is the first time we hit eof, insert 16 extra padding btis
	4250	+ // to allow us to keep going; if we actually consume any of them
	4251	+ // though, that is invalid data. This is caught later.
	4252	+ a->hit_zeof_once = 1;
	4253	+ a->num_bits += 16; // add 16 implicit zero bits
	4254	+ } else {
	4255	+ // We already inserted our extra 16 padding bits and are again
	4256	+ // out, this stream is actually prematurely terminated.
	4257	+ return -1;
	4258	+ }
	4259	+ } else {
	4260	+ stbi__fill_bits(a);
	4261	+ }
	4262	+ }
	4263	+ b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
	4264	+ if (b) {
	4265	+ s = b >> 9;
	4266	+ a->code_buffer >>= s;
	4267	+ a->num_bits -= s;
	4268	+ return b & 511;
	4269	+ }
	4270	+ return stbi__zhuffman_decode_slowpath(a, z);
	4271	+}
	4272	+
	4273	+static int stbi__zexpand(stbi__zbuf z, char zout, int n) // need to make room for n bytes
	4274	+{
	4275	+ char *q;
	4276	+ unsigned int cur, limit, old_limit;
	4277	+ z->zout = zout;
	4278	+ if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
	4279	+ cur = (unsigned int) (z->zout - z->zout_start);
	4280	+ limit = old_limit = (unsigned) (z->zout_end - z->zout_start);
	4281	+ if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory");
	4282	+ while (cur + n > limit) {
	4283	+ if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory");
	4284	+ limit *= 2;
	4285	+ }
	4286	+ q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
	4287	+ STBI_NOTUSED(old_limit);
	4288	+ if (q == NULL) return stbi__err("outofmem", "Out of memory");
	4289	+ z->zout_start = q;
	4290	+ z->zout = q + cur;
	4291	+ z->zout_end = q + limit;
	4292	+ return 1;
	4293	+}
	4294	+
	4295	+static const int stbi__zlength_base[31] = {
	4296	+ 3,4,5,6,7,8,9,10,11,13,
	4297	+ 15,17,19,23,27,31,35,43,51,59,
	4298	+ 67,83,99,115,131,163,195,227,258,0,0 };
	4299	+
	4300	+static const int stbi__zlength_extra[31]=
	4301	+{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
	4302	+
	4303	+static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
	4304	+257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
	4305	+
	4306	+static const int stbi__zdist_extra[32] =
	4307	+{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
	4308	+
	4309	+static int stbi__parse_huffman_block(stbi__zbuf *a)
	4310	+{
	4311	+ char *zout = a->zout;
	4312	+ for(;;) {
	4313	+ int z = stbi__zhuffman_decode(a, &a->z_length);
	4314	+ if (z < 256) {
	4315	+ if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
	4316	+ if (zout >= a->zout_end) {
	4317	+ if (!stbi__zexpand(a, zout, 1)) return 0;
	4318	+ zout = a->zout;
	4319	+ }
	4320	+ *zout++ = (char) z;
	4321	+ } else {
	4322	+ stbi_uc *p;
	4323	+ int len,dist;
	4324	+ if (z == 256) {
	4325	+ a->zout = zout;
	4326	+ if (a->hit_zeof_once && a->num_bits < 16) {
	4327	+ // The first time we hit zeof, we inserted 16 extra zero bits into our bit
	4328	+ // buffer so the decoder can just do its speculative decoding. But if we
	4329	+ // actually consumed any of those bits (which is the case when num_bits < 16),
	4330	+ // the stream actually read past the end so it is malformed.
	4331	+ return stbi__err("unexpected end","Corrupt PNG");
	4332	+ }
	4333	+ return 1;
	4334	+ }
	4335	+ if (z >= 286) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, length codes 286 and 287 must not appear in compressed data
	4336	+ z -= 257;
	4337	+ len = stbi__zlength_base[z];
	4338	+ if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
	4339	+ z = stbi__zhuffman_decode(a, &a->z_distance);
	4340	+ if (z < 0 \|\| z >= 30) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, distance codes 30 and 31 must not appear in compressed data
	4341	+ dist = stbi__zdist_base[z];
	4342	+ if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
	4343	+ if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
	4344	+ if (len > a->zout_end - zout) {
	4345	+ if (!stbi__zexpand(a, zout, len)) return 0;
	4346	+ zout = a->zout;
	4347	+ }
	4348	+ p = (stbi_uc *) (zout - dist);
	4349	+ if (dist == 1) { // run of one byte; common in images.
	4350	+ stbi_uc v = *p;
	4351	+ if (len) { do *zout++ = v; while (--len); }
	4352	+ } else {
	4353	+ if (len) { do zout++ = p++; while (--len); }
	4354	+ }
	4355	+ }
	4356	+ }
	4357	+}
	4358	+
	4359	+static int stbi__compute_huffman_codes(stbi__zbuf *a)
	4360	+{
	4361	+ static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
	4362	+ stbi__zhuffman z_codelength;
	4363	+ stbi_uc lencodes[286+32+137];//padding for maximum single op
	4364	+ stbi_uc codelength_sizes[19];
	4365	+ int i,n;
	4366	+
	4367	+ int hlit = stbi__zreceive(a,5) + 257;
	4368	+ int hdist = stbi__zreceive(a,5) + 1;
	4369	+ int hclen = stbi__zreceive(a,4) + 4;
	4370	+ int ntot = hlit + hdist;
	4371	+
	4372	+ memset(codelength_sizes, 0, sizeof(codelength_sizes));
	4373	+ for (i=0; i < hclen; ++i) {
	4374	+ int s = stbi__zreceive(a,3);
	4375	+ codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
	4376	+ }
	4377	+ if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
	4378	+
	4379	+ n = 0;
	4380	+ while (n < ntot) {
	4381	+ int c = stbi__zhuffman_decode(a, &z_codelength);
	4382	+ if (c < 0 \|\| c >= 19) return stbi__err("bad codelengths", "Corrupt PNG");
	4383	+ if (c < 16)
	4384	+ lencodes[n++] = (stbi_uc) c;
	4385	+ else {
	4386	+ stbi_uc fill = 0;
	4387	+ if (c == 16) {
	4388	+ c = stbi__zreceive(a,2)+3;
	4389	+ if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG");
	4390	+ fill = lencodes[n-1];
	4391	+ } else if (c == 17) {
	4392	+ c = stbi__zreceive(a,3)+3;
	4393	+ } else if (c == 18) {
	4394	+ c = stbi__zreceive(a,7)+11;
	4395	+ } else {
	4396	+ return stbi__err("bad codelengths", "Corrupt PNG");
	4397	+ }
	4398	+ if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG");
	4399	+ memset(lencodes+n, fill, c);
	4400	+ n += c;
	4401	+ }
	4402	+ }
	4403	+ if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG");
	4404	+ if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
	4405	+ if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
	4406	+ return 1;
	4407	+}
	4408	+
	4409	+static int stbi__parse_uncompressed_block(stbi__zbuf *a)
	4410	+{
	4411	+ stbi_uc header[4];
	4412	+ int len,nlen,k;
	4413	+ if (a->num_bits & 7)
	4414	+ stbi__zreceive(a, a->num_bits & 7); // discard
	4415	+ // drain the bit-packed data into header
	4416	+ k = 0;
	4417	+ while (a->num_bits > 0) {
	4418	+ header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
	4419	+ a->code_buffer >>= 8;
	4420	+ a->num_bits -= 8;
	4421	+ }
	4422	+ if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG");
	4423	+ // now fill header the normal way
	4424	+ while (k < 4)
	4425	+ header[k++] = stbi__zget8(a);
	4426	+ len = header[1] * 256 + header[0];
	4427	+ nlen = header[3] * 256 + header[2];
	4428	+ if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
	4429	+ if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
	4430	+ if (a->zout + len > a->zout_end)
	4431	+ if (!stbi__zexpand(a, a->zout, len)) return 0;
	4432	+ memcpy(a->zout, a->zbuffer, len);
	4433	+ a->zbuffer += len;
	4434	+ a->zout += len;
	4435	+ return 1;
	4436	+}
	4437	+
	4438	+static int stbi__parse_zlib_header(stbi__zbuf *a)
	4439	+{
	4440	+ int cmf = stbi__zget8(a);
	4441	+ int cm = cmf & 15;
	4442	+ /* int cinfo = cmf >> 4; */
	4443	+ int flg = stbi__zget8(a);
	4444	+ if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
	4445	+ if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
	4446	+ if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
	4447	+ if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
	4448	+ // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
	4449	+ return 1;
	4450	+}
	4451	+
	4452	+static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] =
	4453	+{
	4454	+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
	4455	+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
	4456	+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
	4457	+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
	4458	+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
	4459	+ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
	4460	+ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
	4461	+ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
	4462	+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8
	4463	+};
	4464	+static const stbi_uc stbi__zdefault_distance[32] =
	4465	+{
	4466	+ 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
	4467	+};
	4468	+/*
	4469	+Init algorithm:
	4470	+{
	4471	+ int i; // use <= to match clearly with spec
	4472	+ for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8;
	4473	+ for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9;
	4474	+ for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7;
	4475	+ for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8;
	4476	+
	4477	+ for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5;
	4478	+}
	4479	+*/
	4480	+
	4481	+static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
	4482	+{
	4483	+ int final, type;
	4484	+ if (parse_header)
	4485	+ if (!stbi__parse_zlib_header(a)) return 0;
	4486	+ a->num_bits = 0;
	4487	+ a->code_buffer = 0;
	4488	+ a->hit_zeof_once = 0;
	4489	+ do {
	4490	+ final = stbi__zreceive(a,1);
	4491	+ type = stbi__zreceive(a,2);
	4492	+ if (type == 0) {
	4493	+ if (!stbi__parse_uncompressed_block(a)) return 0;
	4494	+ } else if (type == 3) {
	4495	+ return 0;
	4496	+ } else {
	4497	+ if (type == 1) {
	4498	+ // use fixed code lengths
	4499	+ if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , STBI__ZNSYMS)) return 0;
	4500	+ if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0;
	4501	+ } else {
	4502	+ if (!stbi__compute_huffman_codes(a)) return 0;
	4503	+ }
	4504	+ if (!stbi__parse_huffman_block(a)) return 0;
	4505	+ }
	4506	+ } while (!final);
	4507	+ return 1;
	4508	+}
	4509	+
	4510	+static int stbi__do_zlib(stbi__zbuf a, char obuf, int olen, int exp, int parse_header)
	4511	+{
	4512	+ a->zout_start = obuf;
	4513	+ a->zout = obuf;
	4514	+ a->zout_end = obuf + olen;
	4515	+ a->z_expandable = exp;
	4516	+
	4517	+ return stbi__parse_zlib(a, parse_header);
	4518	+}
	4519	+
	4520	+STBIDEF char stbi_zlib_decode_malloc_guesssize(const char buffer, int len, int initial_size, int *outlen)
	4521	+{
	4522	+ stbi__zbuf a;
	4523	+ char p = (char ) stbi__malloc(initial_size);
	4524	+ if (p == NULL) return NULL;
	4525	+ a.zbuffer = (stbi_uc *) buffer;
	4526	+ a.zbuffer_end = (stbi_uc *) buffer + len;
	4527	+ if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
	4528	+ if (outlen) *outlen = (int) (a.zout - a.zout_start);
	4529	+ return a.zout_start;
	4530	+ } else {
	4531	+ STBI_FREE(a.zout_start);
	4532	+ return NULL;
	4533	+ }
	4534	+}
	4535	+
	4536	+STBIDEF char stbi_zlib_decode_malloc(char const buffer, int len, int *outlen)
	4537	+{
	4538	+ return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
	4539	+}
	4540	+
	4541	+STBIDEF char stbi_zlib_decode_malloc_guesssize_headerflag(const char buffer, int len, int initial_size, int *outlen, int parse_header)
	4542	+{
	4543	+ stbi__zbuf a;
	4544	+ char p = (char ) stbi__malloc(initial_size);
	4545	+ if (p == NULL) return NULL;
	4546	+ a.zbuffer = (stbi_uc *) buffer;
	4547	+ a.zbuffer_end = (stbi_uc *) buffer + len;
	4548	+ if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
	4549	+ if (outlen) *outlen = (int) (a.zout - a.zout_start);
	4550	+ return a.zout_start;
	4551	+ } else {
	4552	+ STBI_FREE(a.zout_start);
	4553	+ return NULL;
	4554	+ }
	4555	+}
	4556	+
	4557	+STBIDEF int stbi_zlib_decode_buffer(char obuffer, int olen, char const ibuffer, int ilen)
	4558	+{
	4559	+ stbi__zbuf a;
	4560	+ a.zbuffer = (stbi_uc *) ibuffer;
	4561	+ a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
	4562	+ if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
	4563	+ return (int) (a.zout - a.zout_start);
	4564	+ else
	4565	+ return -1;
	4566	+}
	4567	+
	4568	+STBIDEF char stbi_zlib_decode_noheader_malloc(char const buffer, int len, int *outlen)
	4569	+{
	4570	+ stbi__zbuf a;
	4571	+ char p = (char ) stbi__malloc(16384);
	4572	+ if (p == NULL) return NULL;
	4573	+ a.zbuffer = (stbi_uc *) buffer;
	4574	+ a.zbuffer_end = (stbi_uc *) buffer+len;
	4575	+ if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
	4576	+ if (outlen) *outlen = (int) (a.zout - a.zout_start);
	4577	+ return a.zout_start;
	4578	+ } else {
	4579	+ STBI_FREE(a.zout_start);
	4580	+ return NULL;
	4581	+ }
	4582	+}
	4583	+
	4584	+STBIDEF int stbi_zlib_decode_noheader_buffer(char obuffer, int olen, const char ibuffer, int ilen)
	4585	+{
	4586	+ stbi__zbuf a;
	4587	+ a.zbuffer = (stbi_uc *) ibuffer;
	4588	+ a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
	4589	+ if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
	4590	+ return (int) (a.zout - a.zout_start);
	4591	+ else
	4592	+ return -1;
	4593	+}
	4594	+#endif
	4595	+
	4596	+// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18
	4597	+// simple implementation
	4598	+// - only 8-bit samples
	4599	+// - no CRC checking
	4600	+// - allocates lots of intermediate memory
	4601	+// - avoids problem of streaming data between subsystems
	4602	+// - avoids explicit window management
	4603	+// performance
	4604	+// - uses stb_zlib, a PD zlib implementation with fast huffman decoding
	4605	+
	4606	+#ifndef STBI_NO_PNG
	4607	+typedef struct
	4608	+{
	4609	+ stbi__uint32 length;
	4610	+ stbi__uint32 type;
	4611	+} stbi__pngchunk;
	4612	+
	4613	+static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
	4614	+{
	4615	+ stbi__pngchunk c;
	4616	+ c.length = stbi__get32be(s);
	4617	+ c.type = stbi__get32be(s);
	4618	+ return c;
	4619	+}
	4620	+
	4621	+static int stbi__check_png_header(stbi__context *s)
	4622	+{
	4623	+ static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
	4624	+ int i;
	4625	+ for (i=0; i < 8; ++i)
	4626	+ if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
	4627	+ return 1;
	4628	+}
	4629	+
	4630	+typedef struct
	4631	+{
	4632	+ stbi__context *s;
	4633	+ stbi_uc idata, expanded, *out;
	4634	+ int depth;
	4635	+} stbi__png;
	4636	+
	4637	+
	4638	+enum {
	4639	+ STBI__F_none=0,
	4640	+ STBI__F_sub=1,
	4641	+ STBI__F_up=2,
	4642	+ STBI__F_avg=3,
	4643	+ STBI__F_paeth=4,
	4644	+ // synthetic filter used for first scanline to avoid needing a dummy row of 0s
	4645	+ STBI__F_avg_first
	4646	+};
	4647	+
	4648	+static stbi_uc first_row_filter[5] =
	4649	+{
	4650	+ STBI__F_none,
	4651	+ STBI__F_sub,
	4652	+ STBI__F_none,
	4653	+ STBI__F_avg_first,
	4654	+ STBI__F_sub // Paeth with b=c=0 turns out to be equivalent to sub
	4655	+};
	4656	+
	4657	+static int stbi__paeth(int a, int b, int c)
	4658	+{
	4659	+ // This formulation looks very different from the reference in the PNG spec, but is
	4660	+ // actually equivalent and has favorable data dependencies and admits straightforward
	4661	+ // generation of branch-free code, which helps performance significantly.
	4662	+ int thresh = c*3 - (a + b);
	4663	+ int lo = a < b ? a : b;
	4664	+ int hi = a < b ? b : a;
	4665	+ int t0 = (hi <= thresh) ? lo : c;
	4666	+ int t1 = (thresh <= lo) ? hi : t0;
	4667	+ return t1;
	4668	+}
	4669	+
	4670	+static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 };
	4671	+
	4672	+// adds an extra all-255 alpha channel
	4673	+// dest == src is legal
	4674	+// img_n must be 1 or 3
	4675	+static void stbi__create_png_alpha_expand8(stbi_uc dest, stbi_uc src, stbi__uint32 x, int img_n)
	4676	+{
	4677	+ int i;
	4678	+ // must process data backwards since we allow dest==src
	4679	+ if (img_n == 1) {
	4680	+ for (i=x-1; i >= 0; --i) {
	4681	+ dest[i*2+1] = 255;
	4682	+ dest[i*2+0] = src[i];
	4683	+ }
	4684	+ } else {
	4685	+ STBI_ASSERT(img_n == 3);
	4686	+ for (i=x-1; i >= 0; --i) {
	4687	+ dest[i*4+3] = 255;
	4688	+ dest[i4+2] = src[i3+2];
	4689	+ dest[i4+1] = src[i3+1];
	4690	+ dest[i4+0] = src[i3+0];
	4691	+ }
	4692	+ }
	4693	+}
	4694	+
	4695	+// create the png data from post-deflated data
	4696	+static int stbi__create_png_image_raw(stbi__png a, stbi_uc raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color)
	4697	+{
	4698	+ int bytes = (depth == 16 ? 2 : 1);
	4699	+ stbi__context *s = a->s;
	4700	+ stbi__uint32 i,j,stride = xout_nbytes;
	4701	+ stbi__uint32 img_len, img_width_bytes;
	4702	+ stbi_uc *filter_buf;
	4703	+ int all_ok = 1;
	4704	+ int k;
	4705	+ int img_n = s->img_n; // copy it into a local for later
	4706	+
	4707	+ int output_bytes = out_n*bytes;
	4708	+ int filter_bytes = img_n*bytes;
	4709	+ int width = x;
	4710	+
	4711	+ STBI_ASSERT(out_n == s->img_n \|\| out_n == s->img_n+1);
	4712	+ a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
	4713	+ if (!a->out) return stbi__err("outofmem", "Out of memory");
	4714	+
	4715	+ // note: error exits here don't need to clean up a->out individually,
	4716	+ // stbi__do_png always does on error.
	4717	+ if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG");
	4718	+ img_width_bytes = (((img_n * x * depth) + 7) >> 3);
	4719	+ if (!stbi__mad2sizes_valid(img_width_bytes, y, img_width_bytes)) return stbi__err("too large", "Corrupt PNG");
	4720	+ img_len = (img_width_bytes + 1) * y;
	4721	+
	4722	+ // we used to check for exact match between raw_len and img_len on non-interlaced PNGs,
	4723	+ // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros),
	4724	+ // so just check for raw_len < img_len always.
	4725	+ if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG");
	4726	+
	4727	+ // Allocate two scan lines worth of filter workspace buffer.
	4728	+ filter_buf = (stbi_uc *) stbi__malloc_mad2(img_width_bytes, 2, 0);
	4729	+ if (!filter_buf) return stbi__err("outofmem", "Out of memory");
	4730	+
	4731	+ // Filtering for low-bit-depth images
	4732	+ if (depth < 8) {
	4733	+ filter_bytes = 1;
	4734	+ width = img_width_bytes;
	4735	+ }
	4736	+
	4737	+ for (j=0; j < y; ++j) {
	4738	+ // cur/prior filter buffers alternate
	4739	+ stbi_uc cur = filter_buf + (j & 1)img_width_bytes;
	4740	+ stbi_uc prior = filter_buf + (~j & 1)img_width_bytes;
	4741	+ stbi_uc dest = a->out + stridej;
	4742	+ int nk = width * filter_bytes;
	4743	+ int filter = *raw++;
	4744	+
	4745	+ // check filter type
	4746	+ if (filter > 4) {
	4747	+ all_ok = stbi__err("invalid filter","Corrupt PNG");
	4748	+ break;
	4749	+ }
	4750	+
	4751	+ // if first row, use special filter that doesn't sample previous row
	4752	+ if (j == 0) filter = first_row_filter[filter];
	4753	+
	4754	+ // perform actual filtering
	4755	+ switch (filter) {
	4756	+ case STBI__F_none:
	4757	+ memcpy(cur, raw, nk);
	4758	+ break;
	4759	+ case STBI__F_sub:
	4760	+ memcpy(cur, raw, filter_bytes);
	4761	+ for (k = filter_bytes; k < nk; ++k)
	4762	+ cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]);
	4763	+ break;
	4764	+ case STBI__F_up:
	4765	+ for (k = 0; k < nk; ++k)
	4766	+ cur[k] = STBI__BYTECAST(raw[k] + prior[k]);
	4767	+ break;
	4768	+ case STBI__F_avg:
	4769	+ for (k = 0; k < filter_bytes; ++k)
	4770	+ cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1));
	4771	+ for (k = filter_bytes; k < nk; ++k)
	4772	+ cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1));
	4773	+ break;
	4774	+ case STBI__F_paeth:
	4775	+ for (k = 0; k < filter_bytes; ++k)
	4776	+ cur[k] = STBI__BYTECAST(raw[k] + prior[k]); // prior[k] == stbi__paeth(0,prior[k],0)
	4777	+ for (k = filter_bytes; k < nk; ++k)
	4778	+ cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes], prior[k], prior[k-filter_bytes]));
	4779	+ break;
	4780	+ case STBI__F_avg_first:
	4781	+ memcpy(cur, raw, filter_bytes);
	4782	+ for (k = filter_bytes; k < nk; ++k)
	4783	+ cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1));
	4784	+ break;
	4785	+ }
	4786	+
	4787	+ raw += nk;
	4788	+
	4789	+ // expand decoded bits in cur to dest, also adding an extra alpha channel if desired
	4790	+ if (depth < 8) {
	4791	+ stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
	4792	+ stbi_uc *in = cur;
	4793	+ stbi_uc *out = dest;
	4794	+ stbi_uc inb = 0;
	4795	+ stbi__uint32 nsmp = x*img_n;
	4796	+
	4797	+ // expand bits to bytes first
	4798	+ if (depth == 4) {
	4799	+ for (i=0; i < nsmp; ++i) {
	4800	+ if ((i & 1) == 0) inb = *in++;
	4801	+ out++ = scale (inb >> 4);
	4802	+ inb <<= 4;
	4803	+ }
	4804	+ } else if (depth == 2) {
	4805	+ for (i=0; i < nsmp; ++i) {
	4806	+ if ((i & 3) == 0) inb = *in++;
	4807	+ out++ = scale (inb >> 6);
	4808	+ inb <<= 2;
	4809	+ }
	4810	+ } else {
	4811	+ STBI_ASSERT(depth == 1);
	4812	+ for (i=0; i < nsmp; ++i) {
	4813	+ if ((i & 7) == 0) inb = *in++;
	4814	+ out++ = scale (inb >> 7);
	4815	+ inb <<= 1;
	4816	+ }
	4817	+ }
	4818	+
	4819	+ // insert alpha=255 values if desired
	4820	+ if (img_n != out_n)
	4821	+ stbi__create_png_alpha_expand8(dest, dest, x, img_n);
	4822	+ } else if (depth == 8) {
	4823	+ if (img_n == out_n)
	4824	+ memcpy(dest, cur, x*img_n);
	4825	+ else
	4826	+ stbi__create_png_alpha_expand8(dest, cur, x, img_n);
	4827	+ } else if (depth == 16) {
	4828	+ // convert the image data from big-endian to platform-native
	4829	+ stbi__uint16 dest16 = (stbi__uint16)dest;
	4830	+ stbi__uint32 nsmp = x*img_n;
	4831	+
	4832	+ if (img_n == out_n) {
	4833	+ for (i = 0; i < nsmp; ++i, ++dest16, cur += 2)
	4834	+ *dest16 = (cur[0] << 8) \| cur[1];
	4835	+ } else {
	4836	+ STBI_ASSERT(img_n+1 == out_n);
	4837	+ if (img_n == 1) {
	4838	+ for (i = 0; i < x; ++i, dest16 += 2, cur += 2) {
	4839	+ dest16[0] = (cur[0] << 8) \| cur[1];
	4840	+ dest16[1] = 0xffff;
	4841	+ }
	4842	+ } else {
	4843	+ STBI_ASSERT(img_n == 3);
	4844	+ for (i = 0; i < x; ++i, dest16 += 4, cur += 6) {
	4845	+ dest16[0] = (cur[0] << 8) \| cur[1];
	4846	+ dest16[1] = (cur[2] << 8) \| cur[3];
	4847	+ dest16[2] = (cur[4] << 8) \| cur[5];
	4848	+ dest16[3] = 0xffff;
	4849	+ }
	4850	+ }
	4851	+ }
	4852	+ }
	4853	+ }
	4854	+
	4855	+ STBI_FREE(filter_buf);
	4856	+ if (!all_ok) return 0;
	4857	+
	4858	+ return 1;
	4859	+}
	4860	+
	4861	+static int stbi__create_png_image(stbi__png a, stbi_uc image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced)
	4862	+{
	4863	+ int bytes = (depth == 16 ? 2 : 1);
	4864	+ int out_bytes = out_n * bytes;
	4865	+ stbi_uc *final;
	4866	+ int p;
	4867	+ if (!interlaced)
	4868	+ return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
	4869	+
	4870	+ // de-interlacing
	4871	+ final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
	4872	+ if (!final) return stbi__err("outofmem", "Out of memory");
	4873	+ for (p=0; p < 7; ++p) {
	4874	+ int xorig[] = { 0,4,0,2,0,1,0 };
	4875	+ int yorig[] = { 0,0,4,0,2,0,1 };
	4876	+ int xspc[] = { 8,8,4,4,2,2,1 };
	4877	+ int yspc[] = { 8,8,8,4,4,2,2 };
	4878	+ int i,j,x,y;
	4879	+ // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
	4880	+ x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
	4881	+ y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
	4882	+ if (x && y) {
	4883	+ stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
	4884	+ if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
	4885	+ STBI_FREE(final);
	4886	+ return 0;
	4887	+ }
	4888	+ for (j=0; j < y; ++j) {
	4889	+ for (i=0; i < x; ++i) {
	4890	+ int out_y = j*yspc[p]+yorig[p];
	4891	+ int out_x = i*xspc[p]+xorig[p];
	4892	+ memcpy(final + out_ya->s->img_xout_bytes + out_x*out_bytes,
	4893	+ a->out + (jx+i)out_bytes, out_bytes);
	4894	+ }
	4895	+ }
	4896	+ STBI_FREE(a->out);
	4897	+ image_data += img_len;
	4898	+ image_data_len -= img_len;
	4899	+ }
	4900	+ }
	4901	+ a->out = final;
	4902	+
	4903	+ return 1;
	4904	+}
	4905	+
	4906	+static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
	4907	+{
	4908	+ stbi__context *s = z->s;
	4909	+ stbi__uint32 i, pixel_count = s->img_x * s->img_y;
	4910	+ stbi_uc *p = z->out;
	4911	+
	4912	+ // compute color-based transparency, assuming we've
	4913	+ // already got 255 as the alpha value in the output
	4914	+ STBI_ASSERT(out_n == 2 \|\| out_n == 4);
	4915	+
	4916	+ if (out_n == 2) {
	4917	+ for (i=0; i < pixel_count; ++i) {
	4918	+ p[1] = (p[0] == tc[0] ? 0 : 255);
	4919	+ p += 2;
	4920	+ }
	4921	+ } else {
	4922	+ for (i=0; i < pixel_count; ++i) {
	4923	+ if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
	4924	+ p[3] = 0;
	4925	+ p += 4;
	4926	+ }
	4927	+ }
	4928	+ return 1;
	4929	+}
	4930	+
	4931	+static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n)
	4932	+{
	4933	+ stbi__context *s = z->s;
	4934	+ stbi__uint32 i, pixel_count = s->img_x * s->img_y;
	4935	+ stbi__uint16 p = (stbi__uint16) z->out;
	4936	+
	4937	+ // compute color-based transparency, assuming we've
	4938	+ // already got 65535 as the alpha value in the output
	4939	+ STBI_ASSERT(out_n == 2 \|\| out_n == 4);
	4940	+
	4941	+ if (out_n == 2) {
	4942	+ for (i = 0; i < pixel_count; ++i) {
	4943	+ p[1] = (p[0] == tc[0] ? 0 : 65535);
	4944	+ p += 2;
	4945	+ }
	4946	+ } else {
	4947	+ for (i = 0; i < pixel_count; ++i) {
	4948	+ if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
	4949	+ p[3] = 0;
	4950	+ p += 4;
	4951	+ }
	4952	+ }
	4953	+ return 1;
	4954	+}
	4955	+
	4956	+static int stbi__expand_png_palette(stbi__png a, stbi_uc palette, int len, int pal_img_n)
	4957	+{
	4958	+ stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
	4959	+ stbi_uc p, temp_out, *orig = a->out;
	4960	+
	4961	+ p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0);
	4962	+ if (p == NULL) return stbi__err("outofmem", "Out of memory");
	4963	+
	4964	+ // between here and free(out) below, exitting would leak
	4965	+ temp_out = p;
	4966	+
	4967	+ if (pal_img_n == 3) {
	4968	+ for (i=0; i < pixel_count; ++i) {
	4969	+ int n = orig[i]*4;
	4970	+ p[0] = palette[n ];
	4971	+ p[1] = palette[n+1];
	4972	+ p[2] = palette[n+2];
	4973	+ p += 3;
	4974	+ }
	4975	+ } else {
	4976	+ for (i=0; i < pixel_count; ++i) {
	4977	+ int n = orig[i]*4;
	4978	+ p[0] = palette[n ];
	4979	+ p[1] = palette[n+1];
	4980	+ p[2] = palette[n+2];
	4981	+ p[3] = palette[n+3];
	4982	+ p += 4;
	4983	+ }
	4984	+ }
	4985	+ STBI_FREE(a->out);
	4986	+ a->out = temp_out;
	4987	+
	4988	+ STBI_NOTUSED(len);
	4989	+
	4990	+ return 1;
	4991	+}
	4992	+
	4993	+static int stbi__unpremultiply_on_load_global = 0;
	4994	+static int stbi__de_iphone_flag_global = 0;
	4995	+
	4996	+STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
	4997	+{
	4998	+ stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply;
	4999	+}
	5000	+
	5001	+STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
	5002	+{
	5003	+ stbi__de_iphone_flag_global = flag_true_if_should_convert;
	5004	+}
	5005	+
	5006	+#ifndef STBI_THREAD_LOCAL
	5007	+#define stbi__unpremultiply_on_load stbi__unpremultiply_on_load_global
	5008	+#define stbi__de_iphone_flag stbi__de_iphone_flag_global
	5009	+#else
	5010	+static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set;
	5011	+static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set;
	5012	+
	5013	+STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply)
	5014	+{
	5015	+ stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply;
	5016	+ stbi__unpremultiply_on_load_set = 1;
	5017	+}
	5018	+
	5019	+STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert)
	5020	+{
	5021	+ stbi__de_iphone_flag_local = flag_true_if_should_convert;
	5022	+ stbi__de_iphone_flag_set = 1;
	5023	+}
	5024	+
	5025	+#define stbi__unpremultiply_on_load (stbi__unpremultiply_on_load_set \
	5026	+ ? stbi__unpremultiply_on_load_local \
	5027	+ : stbi__unpremultiply_on_load_global)
	5028	+#define stbi__de_iphone_flag (stbi__de_iphone_flag_set \
	5029	+ ? stbi__de_iphone_flag_local \
	5030	+ : stbi__de_iphone_flag_global)
	5031	+#endif // STBI_THREAD_LOCAL
	5032	+
	5033	+static void stbi__de_iphone(stbi__png *z)
	5034	+{
	5035	+ stbi__context *s = z->s;
	5036	+ stbi__uint32 i, pixel_count = s->img_x * s->img_y;
	5037	+ stbi_uc *p = z->out;
	5038	+
	5039	+ if (s->img_out_n == 3) { // convert bgr to rgb
	5040	+ for (i=0; i < pixel_count; ++i) {
	5041	+ stbi_uc t = p[0];
	5042	+ p[0] = p[2];
	5043	+ p[2] = t;
	5044	+ p += 3;
	5045	+ }
	5046	+ } else {
	5047	+ STBI_ASSERT(s->img_out_n == 4);
	5048	+ if (stbi__unpremultiply_on_load) {
	5049	+ // convert bgr to rgb and unpremultiply
	5050	+ for (i=0; i < pixel_count; ++i) {
	5051	+ stbi_uc a = p[3];
	5052	+ stbi_uc t = p[0];
	5053	+ if (a) {
	5054	+ stbi_uc half = a / 2;
	5055	+ p[0] = (p[2] * 255 + half) / a;
	5056	+ p[1] = (p[1] * 255 + half) / a;
	5057	+ p[2] = ( t * 255 + half) / a;
	5058	+ } else {
	5059	+ p[0] = p[2];
	5060	+ p[2] = t;
	5061	+ }
	5062	+ p += 4;
	5063	+ }
	5064	+ } else {
	5065	+ // convert bgr to rgb
	5066	+ for (i=0; i < pixel_count; ++i) {
	5067	+ stbi_uc t = p[0];
	5068	+ p[0] = p[2];
	5069	+ p[2] = t;
	5070	+ p += 4;
	5071	+ }
	5072	+ }
	5073	+ }
	5074	+}
	5075	+
	5076	+#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d))
	5077	+
	5078	+static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
	5079	+{
	5080	+ stbi_uc palette[1024], pal_img_n=0;
	5081	+ stbi_uc has_trans=0, tc[3]={0};
	5082	+ stbi__uint16 tc16[3];
	5083	+ stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
	5084	+ int first=1,k,interlace=0, color=0, is_iphone=0;
	5085	+ stbi__context *s = z->s;
	5086	+
	5087	+ z->expanded = NULL;
	5088	+ z->idata = NULL;
	5089	+ z->out = NULL;
	5090	+
	5091	+ if (!stbi__check_png_header(s)) return 0;
	5092	+
	5093	+ if (scan == STBI__SCAN_type) return 1;
	5094	+
	5095	+ for (;;) {
	5096	+ stbi__pngchunk c = stbi__get_chunk_header(s);
	5097	+ switch (c.type) {
	5098	+ case STBI__PNG_TYPE('C','g','B','I'):
	5099	+ is_iphone = 1;
	5100	+ stbi__skip(s, c.length);
	5101	+ break;
	5102	+ case STBI__PNG_TYPE('I','H','D','R'): {
	5103	+ int comp,filter;
	5104	+ if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
	5105	+ first = 0;
	5106	+ if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
	5107	+ s->img_x = stbi__get32be(s);
	5108	+ s->img_y = stbi__get32be(s);
	5109	+ if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
	5110	+ if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
	5111	+ z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only");
	5112	+ color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG");
	5113	+ if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG");
	5114	+ if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
	5115	+ comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG");
	5116	+ filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG");
	5117	+ interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
	5118	+ if (!s->img_x \|\| !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
	5119	+ if (!pal_img_n) {
	5120	+ s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
	5121	+ if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode");
	5122	+ } else {
	5123	+ // if paletted, then pal_n is our final components, and
	5124	+ // img_n is # components to decompress/filter.
	5125	+ s->img_n = 1;
	5126	+ if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
	5127	+ }
	5128	+ // even with SCAN_header, have to scan to see if we have a tRNS
	5129	+ break;
	5130	+ }
	5131	+
	5132	+ case STBI__PNG_TYPE('P','L','T','E'): {
	5133	+ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
	5134	+ if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
	5135	+ pal_len = c.length / 3;
	5136	+ if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
	5137	+ for (i=0; i < pal_len; ++i) {
	5138	+ palette[i*4+0] = stbi__get8(s);
	5139	+ palette[i*4+1] = stbi__get8(s);
	5140	+ palette[i*4+2] = stbi__get8(s);
	5141	+ palette[i*4+3] = 255;
	5142	+ }
	5143	+ break;
	5144	+ }
	5145	+
	5146	+ case STBI__PNG_TYPE('t','R','N','S'): {
	5147	+ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
	5148	+ if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
	5149	+ if (pal_img_n) {
	5150	+ if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; }
	5151	+ if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
	5152	+ if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
	5153	+ pal_img_n = 4;
	5154	+ for (i=0; i < c.length; ++i)
	5155	+ palette[i*4+3] = stbi__get8(s);
	5156	+ } else {
	5157	+ if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
	5158	+ if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
	5159	+ has_trans = 1;
	5160	+ // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now.
	5161	+ if (scan == STBI__SCAN_header) { ++s->img_n; return 1; }
	5162	+ if (z->depth == 16) {
	5163	+ for (k = 0; k < s->img_n && k < 3; ++k) // extra loop test to suppress false GCC warning
	5164	+ tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
	5165	+ } else {
	5166	+ for (k = 0; k < s->img_n && k < 3; ++k)
	5167	+ tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
	5168	+ }
	5169	+ }
	5170	+ break;
	5171	+ }
	5172	+
	5173	+ case STBI__PNG_TYPE('I','D','A','T'): {
	5174	+ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
	5175	+ if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
	5176	+ if (scan == STBI__SCAN_header) {
	5177	+ // header scan definitely stops at first IDAT
	5178	+ if (pal_img_n)
	5179	+ s->img_n = pal_img_n;
	5180	+ return 1;
	5181	+ }
	5182	+ if (c.length > (1u << 30)) return stbi__err("IDAT size limit", "IDAT section larger than 2^30 bytes");
	5183	+ if ((int)(ioff + c.length) < (int)ioff) return 0;
	5184	+ if (ioff + c.length > idata_limit) {
	5185	+ stbi__uint32 idata_limit_old = idata_limit;
	5186	+ stbi_uc *p;
	5187	+ if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
	5188	+ while (ioff + c.length > idata_limit)
	5189	+ idata_limit *= 2;
	5190	+ STBI_NOTUSED(idata_limit_old);
	5191	+ p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
	5192	+ z->idata = p;
	5193	+ }
	5194	+ if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
	5195	+ ioff += c.length;
	5196	+ break;
	5197	+ }
	5198	+
	5199	+ case STBI__PNG_TYPE('I','E','N','D'): {
	5200	+ stbi__uint32 raw_len, bpl;
	5201	+ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
	5202	+ if (scan != STBI__SCAN_load) return 1;
	5203	+ if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
	5204	+ // initial guess for decoded data size to avoid unnecessary reallocs
	5205	+ bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
	5206	+ raw_len = bpl * s->img_y * s->img_n /* pixels / + s->img_y / filter mode per row */;
	5207	+ z->expanded = (stbi_uc ) stbi_zlib_decode_malloc_guesssize_headerflag((char ) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone);
	5208	+ if (z->expanded == NULL) return 0; // zlib should set error
	5209	+ STBI_FREE(z->idata); z->idata = NULL;
	5210	+ if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) \|\| has_trans)
	5211	+ s->img_out_n = s->img_n+1;
	5212	+ else
	5213	+ s->img_out_n = s->img_n;
	5214	+ if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0;
	5215	+ if (has_trans) {
	5216	+ if (z->depth == 16) {
	5217	+ if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0;
	5218	+ } else {
	5219	+ if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
	5220	+ }
	5221	+ }
	5222	+ if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
	5223	+ stbi__de_iphone(z);
	5224	+ if (pal_img_n) {
	5225	+ // pal_img_n == 3 or 4
	5226	+ s->img_n = pal_img_n; // record the actual colors we had
	5227	+ s->img_out_n = pal_img_n;
	5228	+ if (req_comp >= 3) s->img_out_n = req_comp;
	5229	+ if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
	5230	+ return 0;
	5231	+ } else if (has_trans) {
	5232	+ // non-paletted image with tRNS -> source image has (constant) alpha
	5233	+ ++s->img_n;
	5234	+ }
	5235	+ STBI_FREE(z->expanded); z->expanded = NULL;
	5236	+ // end of PNG chunk, read and skip CRC
	5237	+ stbi__get32be(s);
	5238	+ return 1;
	5239	+ }
	5240	+
	5241	+ default:
	5242	+ // if critical, fail
	5243	+ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
	5244	+ if ((c.type & (1 << 29)) == 0) {
	5245	+ #ifndef STBI_NO_FAILURE_STRINGS
	5246	+ // not threadsafe
	5247	+ static char invalid_chunk[] = "XXXX PNG chunk not known";
	5248	+ invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
	5249	+ invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
	5250	+ invalid_chunk[2] = STBI__BYTECAST(c.type >> 8);
	5251	+ invalid_chunk[3] = STBI__BYTECAST(c.type >> 0);
	5252	+ #endif
	5253	+ return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
	5254	+ }
	5255	+ stbi__skip(s, c.length);
	5256	+ break;
	5257	+ }
	5258	+ // end of PNG chunk, read and skip CRC
	5259	+ stbi__get32be(s);
	5260	+ }
	5261	+}
	5262	+
	5263	+static void stbi__do_png(stbi__png p, int x, int y, int n, int req_comp, stbi__result_info ri)
	5264	+{
	5265	+ void *result=NULL;
	5266	+ if (req_comp < 0 \|\| req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
	5267	+ if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
	5268	+ if (p->depth <= 8)
	5269	+ ri->bits_per_channel = 8;
	5270	+ else if (p->depth == 16)
	5271	+ ri->bits_per_channel = 16;
	5272	+ else
	5273	+ return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth");
	5274	+ result = p->out;
	5275	+ p->out = NULL;
	5276	+ if (req_comp && req_comp != p->s->img_out_n) {
	5277	+ if (ri->bits_per_channel == 8)
	5278	+ result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
	5279	+ else
	5280	+ result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
	5281	+ p->s->img_out_n = req_comp;
	5282	+ if (result == NULL) return result;
	5283	+ }
	5284	+ *x = p->s->img_x;
	5285	+ *y = p->s->img_y;
	5286	+ if (n) *n = p->s->img_n;
	5287	+ }
	5288	+ STBI_FREE(p->out); p->out = NULL;
	5289	+ STBI_FREE(p->expanded); p->expanded = NULL;
	5290	+ STBI_FREE(p->idata); p->idata = NULL;
	5291	+
	5292	+ return result;
	5293	+}
	5294	+
	5295	+static void stbi__png_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	5296	+{
	5297	+ stbi__png p;
	5298	+ p.s = s;
	5299	+ return stbi__do_png(&p, x,y,comp,req_comp, ri);
	5300	+}
	5301	+
	5302	+static int stbi__png_test(stbi__context *s)
	5303	+{
	5304	+ int r;
	5305	+ r = stbi__check_png_header(s);
	5306	+ stbi__rewind(s);
	5307	+ return r;
	5308	+}
	5309	+
	5310	+static int stbi__png_info_raw(stbi__png p, int x, int y, int comp)
	5311	+{
	5312	+ if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
	5313	+ stbi__rewind( p->s );
	5314	+ return 0;
	5315	+ }
	5316	+ if (x) *x = p->s->img_x;
	5317	+ if (y) *y = p->s->img_y;
	5318	+ if (comp) *comp = p->s->img_n;
	5319	+ return 1;
	5320	+}
	5321	+
	5322	+static int stbi__png_info(stbi__context s, int x, int y, int comp)
	5323	+{
	5324	+ stbi__png p;
	5325	+ p.s = s;
	5326	+ return stbi__png_info_raw(&p, x, y, comp);
	5327	+}
	5328	+
	5329	+static int stbi__png_is16(stbi__context *s)
	5330	+{
	5331	+ stbi__png p;
	5332	+ p.s = s;
	5333	+ if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
	5334	+ return 0;
	5335	+ if (p.depth != 16) {
	5336	+ stbi__rewind(p.s);
	5337	+ return 0;
	5338	+ }
	5339	+ return 1;
	5340	+}
	5341	+#endif
	5342	+
	5343	+// Microsoft/Windows BMP image
	5344	+
	5345	+#ifndef STBI_NO_BMP
	5346	+static int stbi__bmp_test_raw(stbi__context *s)
	5347	+{
	5348	+ int r;
	5349	+ int sz;
	5350	+ if (stbi__get8(s) != 'B') return 0;
	5351	+ if (stbi__get8(s) != 'M') return 0;
	5352	+ stbi__get32le(s); // discard filesize
	5353	+ stbi__get16le(s); // discard reserved
	5354	+ stbi__get16le(s); // discard reserved
	5355	+ stbi__get32le(s); // discard data offset
	5356	+ sz = stbi__get32le(s);
	5357	+ r = (sz == 12 \|\| sz == 40 \|\| sz == 56 \|\| sz == 108 \|\| sz == 124);
	5358	+ return r;
	5359	+}
	5360	+
	5361	+static int stbi__bmp_test(stbi__context *s)
	5362	+{
	5363	+ int r = stbi__bmp_test_raw(s);
	5364	+ stbi__rewind(s);
	5365	+ return r;
	5366	+}
	5367	+
	5368	+
	5369	+// returns 0..31 for the highest set bit
	5370	+static int stbi__high_bit(unsigned int z)
	5371	+{
	5372	+ int n=0;
	5373	+ if (z == 0) return -1;
	5374	+ if (z >= 0x10000) { n += 16; z >>= 16; }
	5375	+ if (z >= 0x00100) { n += 8; z >>= 8; }
	5376	+ if (z >= 0x00010) { n += 4; z >>= 4; }
	5377	+ if (z >= 0x00004) { n += 2; z >>= 2; }
	5378	+ if (z >= 0x00002) { n += 1;/* >>= 1;*/ }
	5379	+ return n;
	5380	+}
	5381	+
	5382	+static int stbi__bitcount(unsigned int a)
	5383	+{
	5384	+ a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
	5385	+ a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
	5386	+ a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
	5387	+ a = (a + (a >> 8)); // max 16 per 8 bits
	5388	+ a = (a + (a >> 16)); // max 32 per 8 bits
	5389	+ return a & 0xff;
	5390	+}
	5391	+
	5392	+// extract an arbitrarily-aligned N-bit value (N=bits)
	5393	+// from v, and then make it 8-bits long and fractionally
	5394	+// extend it to full full range.
	5395	+static int stbi__shiftsigned(unsigned int v, int shift, int bits)
	5396	+{
	5397	+ static unsigned int mul_table[9] = {
	5398	+ 0,
	5399	+ 0xff/0b11111111/, 0x55/0b01010101/, 0x49/0b01001001/, 0x11/0b00010001/,
	5400	+ 0x21/0b00100001/, 0x41/0b01000001/, 0x81/0b10000001/, 0x01/0b00000001/,
	5401	+ };
	5402	+ static unsigned int shift_table[9] = {
	5403	+ 0, 0,0,1,0,2,4,6,0,
	5404	+ };
	5405	+ if (shift < 0)
	5406	+ v <<= -shift;
	5407	+ else
	5408	+ v >>= shift;
	5409	+ STBI_ASSERT(v < 256);
	5410	+ v >>= (8-bits);
	5411	+ STBI_ASSERT(bits >= 0 && bits <= 8);
	5412	+ return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits];
	5413	+}
	5414	+
	5415	+typedef struct
	5416	+{
	5417	+ int bpp, offset, hsz;
	5418	+ unsigned int mr,mg,mb,ma, all_a;
	5419	+ int extra_read;
	5420	+} stbi__bmp_data;
	5421	+
	5422	+static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress)
	5423	+{
	5424	+ // BI_BITFIELDS specifies masks explicitly, don't override
	5425	+ if (compress == 3)
	5426	+ return 1;
	5427	+
	5428	+ if (compress == 0) {
	5429	+ if (info->bpp == 16) {
	5430	+ info->mr = 31u << 10;
	5431	+ info->mg = 31u << 5;
	5432	+ info->mb = 31u << 0;
	5433	+ } else if (info->bpp == 32) {
	5434	+ info->mr = 0xffu << 16;
	5435	+ info->mg = 0xffu << 8;
	5436	+ info->mb = 0xffu << 0;
	5437	+ info->ma = 0xffu << 24;
	5438	+ info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
	5439	+ } else {
	5440	+ // otherwise, use defaults, which is all-0
	5441	+ info->mr = info->mg = info->mb = info->ma = 0;
	5442	+ }
	5443	+ return 1;
	5444	+ }
	5445	+ return 0; // error
	5446	+}
	5447	+
	5448	+static void stbi__bmp_parse_header(stbi__context s, stbi__bmp_data *info)
	5449	+{
	5450	+ int hsz;
	5451	+ if (stbi__get8(s) != 'B' \|\| stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
	5452	+ stbi__get32le(s); // discard filesize
	5453	+ stbi__get16le(s); // discard reserved
	5454	+ stbi__get16le(s); // discard reserved
	5455	+ info->offset = stbi__get32le(s);
	5456	+ info->hsz = hsz = stbi__get32le(s);
	5457	+ info->mr = info->mg = info->mb = info->ma = 0;
	5458	+ info->extra_read = 14;
	5459	+
	5460	+ if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP");
	5461	+
	5462	+ if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
	5463	+ if (hsz == 12) {
	5464	+ s->img_x = stbi__get16le(s);
	5465	+ s->img_y = stbi__get16le(s);
	5466	+ } else {
	5467	+ s->img_x = stbi__get32le(s);
	5468	+ s->img_y = stbi__get32le(s);
	5469	+ }
	5470	+ if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
	5471	+ info->bpp = stbi__get16le(s);
	5472	+ if (hsz != 12) {
	5473	+ int compress = stbi__get32le(s);
	5474	+ if (compress == 1 \|\| compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
	5475	+ if (compress >= 4) return stbi__errpuc("BMP JPEG/PNG", "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes
	5476	+ if (compress == 3 && info->bpp != 16 && info->bpp != 32) return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel
	5477	+ stbi__get32le(s); // discard sizeof
	5478	+ stbi__get32le(s); // discard hres
	5479	+ stbi__get32le(s); // discard vres
	5480	+ stbi__get32le(s); // discard colorsused
	5481	+ stbi__get32le(s); // discard max important
	5482	+ if (hsz == 40 \|\| hsz == 56) {
	5483	+ if (hsz == 56) {
	5484	+ stbi__get32le(s);
	5485	+ stbi__get32le(s);
	5486	+ stbi__get32le(s);
	5487	+ stbi__get32le(s);
	5488	+ }
	5489	+ if (info->bpp == 16 \|\| info->bpp == 32) {
	5490	+ if (compress == 0) {
	5491	+ stbi__bmp_set_mask_defaults(info, compress);
	5492	+ } else if (compress == 3) {
	5493	+ info->mr = stbi__get32le(s);
	5494	+ info->mg = stbi__get32le(s);
	5495	+ info->mb = stbi__get32le(s);
	5496	+ info->extra_read += 12;
	5497	+ // not documented, but generated by photoshop and handled by mspaint
	5498	+ if (info->mr == info->mg && info->mg == info->mb) {
	5499	+ // ?!?!?
	5500	+ return stbi__errpuc("bad BMP", "bad BMP");
	5501	+ }
	5502	+ } else
	5503	+ return stbi__errpuc("bad BMP", "bad BMP");
	5504	+ }
	5505	+ } else {
	5506	+ // V4/V5 header
	5507	+ int i;
	5508	+ if (hsz != 108 && hsz != 124)
	5509	+ return stbi__errpuc("bad BMP", "bad BMP");
	5510	+ info->mr = stbi__get32le(s);
	5511	+ info->mg = stbi__get32le(s);
	5512	+ info->mb = stbi__get32le(s);
	5513	+ info->ma = stbi__get32le(s);
	5514	+ if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs
	5515	+ stbi__bmp_set_mask_defaults(info, compress);
	5516	+ stbi__get32le(s); // discard color space
	5517	+ for (i=0; i < 12; ++i)
	5518	+ stbi__get32le(s); // discard color space parameters
	5519	+ if (hsz == 124) {
	5520	+ stbi__get32le(s); // discard rendering intent
	5521	+ stbi__get32le(s); // discard offset of profile data
	5522	+ stbi__get32le(s); // discard size of profile data
	5523	+ stbi__get32le(s); // discard reserved
	5524	+ }
	5525	+ }
	5526	+ }
	5527	+ return (void *) 1;
	5528	+}
	5529	+
	5530	+
	5531	+static void stbi__bmp_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	5532	+{
	5533	+ stbi_uc *out;
	5534	+ unsigned int mr=0,mg=0,mb=0,ma=0, all_a;
	5535	+ stbi_uc pal[256][4];
	5536	+ int psize=0,i,j,width;
	5537	+ int flip_vertically, pad, target;
	5538	+ stbi__bmp_data info;
	5539	+ STBI_NOTUSED(ri);
	5540	+
	5541	+ info.all_a = 255;
	5542	+ if (stbi__bmp_parse_header(s, &info) == NULL)
	5543	+ return NULL; // error code already set
	5544	+
	5545	+ flip_vertically = ((int) s->img_y) > 0;
	5546	+ s->img_y = abs((int) s->img_y);
	5547	+
	5548	+ if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	5549	+ if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	5550	+
	5551	+ mr = info.mr;
	5552	+ mg = info.mg;
	5553	+ mb = info.mb;
	5554	+ ma = info.ma;
	5555	+ all_a = info.all_a;
	5556	+
	5557	+ if (info.hsz == 12) {
	5558	+ if (info.bpp < 24)
	5559	+ psize = (info.offset - info.extra_read - 24) / 3;
	5560	+ } else {
	5561	+ if (info.bpp < 16)
	5562	+ psize = (info.offset - info.extra_read - info.hsz) >> 2;
	5563	+ }
	5564	+ if (psize == 0) {
	5565	+ // accept some number of extra bytes after the header, but if the offset points either to before
	5566	+ // the header ends or implies a large amount of extra data, reject the file as malformed
	5567	+ int bytes_read_so_far = s->callback_already_read + (int)(s->img_buffer - s->img_buffer_original);
	5568	+ int header_limit = 1024; // max we actually read is below 256 bytes currently.
	5569	+ int extra_data_limit = 2564; // what ordinarily goes here is a palette; 256 entries4 bytes is its max size.
	5570	+ if (bytes_read_so_far <= 0 \|\| bytes_read_so_far > header_limit) {
	5571	+ return stbi__errpuc("bad header", "Corrupt BMP");
	5572	+ }
	5573	+ // we established that bytes_read_so_far is positive and sensible.
	5574	+ // the first half of this test rejects offsets that are either too small positives, or
	5575	+ // negative, and guarantees that info.offset >= bytes_read_so_far > 0. this in turn
	5576	+ // ensures the number computed in the second half of the test can't overflow.
	5577	+ if (info.offset < bytes_read_so_far \|\| info.offset - bytes_read_so_far > extra_data_limit) {
	5578	+ return stbi__errpuc("bad offset", "Corrupt BMP");
	5579	+ } else {
	5580	+ stbi__skip(s, info.offset - bytes_read_so_far);
	5581	+ }
	5582	+ }
	5583	+
	5584	+ if (info.bpp == 24 && ma == 0xff000000)
	5585	+ s->img_n = 3;
	5586	+ else
	5587	+ s->img_n = ma ? 4 : 3;
	5588	+ if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
	5589	+ target = req_comp;
	5590	+ else
	5591	+ target = s->img_n; // if they want monochrome, we'll post-convert
	5592	+
	5593	+ // sanity-check size
	5594	+ if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
	5595	+ return stbi__errpuc("too large", "Corrupt BMP");
	5596	+
	5597	+ out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
	5598	+ if (!out) return stbi__errpuc("outofmem", "Out of memory");
	5599	+ if (info.bpp < 16) {
	5600	+ int z=0;
	5601	+ if (psize == 0 \|\| psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
	5602	+ for (i=0; i < psize; ++i) {
	5603	+ pal[i][2] = stbi__get8(s);
	5604	+ pal[i][1] = stbi__get8(s);
	5605	+ pal[i][0] = stbi__get8(s);
	5606	+ if (info.hsz != 12) stbi__get8(s);
	5607	+ pal[i][3] = 255;
	5608	+ }
	5609	+ stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
	5610	+ if (info.bpp == 1) width = (s->img_x + 7) >> 3;
	5611	+ else if (info.bpp == 4) width = (s->img_x + 1) >> 1;
	5612	+ else if (info.bpp == 8) width = s->img_x;
	5613	+ else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
	5614	+ pad = (-width)&3;
	5615	+ if (info.bpp == 1) {
	5616	+ for (j=0; j < (int) s->img_y; ++j) {
	5617	+ int bit_offset = 7, v = stbi__get8(s);
	5618	+ for (i=0; i < (int) s->img_x; ++i) {
	5619	+ int color = (v>>bit_offset)&0x1;
	5620	+ out[z++] = pal[color][0];
	5621	+ out[z++] = pal[color][1];
	5622	+ out[z++] = pal[color][2];
	5623	+ if (target == 4) out[z++] = 255;
	5624	+ if (i+1 == (int) s->img_x) break;
	5625	+ if((--bit_offset) < 0) {
	5626	+ bit_offset = 7;
	5627	+ v = stbi__get8(s);
	5628	+ }
	5629	+ }
	5630	+ stbi__skip(s, pad);
	5631	+ }
	5632	+ } else {
	5633	+ for (j=0; j < (int) s->img_y; ++j) {
	5634	+ for (i=0; i < (int) s->img_x; i += 2) {
	5635	+ int v=stbi__get8(s),v2=0;
	5636	+ if (info.bpp == 4) {
	5637	+ v2 = v & 15;
	5638	+ v >>= 4;
	5639	+ }
	5640	+ out[z++] = pal[v][0];
	5641	+ out[z++] = pal[v][1];
	5642	+ out[z++] = pal[v][2];
	5643	+ if (target == 4) out[z++] = 255;
	5644	+ if (i+1 == (int) s->img_x) break;
	5645	+ v = (info.bpp == 8) ? stbi__get8(s) : v2;
	5646	+ out[z++] = pal[v][0];
	5647	+ out[z++] = pal[v][1];
	5648	+ out[z++] = pal[v][2];
	5649	+ if (target == 4) out[z++] = 255;
	5650	+ }
	5651	+ stbi__skip(s, pad);
	5652	+ }
	5653	+ }
	5654	+ } else {
	5655	+ int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
	5656	+ int z = 0;
	5657	+ int easy=0;
	5658	+ stbi__skip(s, info.offset - info.extra_read - info.hsz);
	5659	+ if (info.bpp == 24) width = 3 * s->img_x;
	5660	+ else if (info.bpp == 16) width = 2*s->img_x;
	5661	+ else /* bpp = 32 and pad = 0 */ width=0;
	5662	+ pad = (-width) & 3;
	5663	+ if (info.bpp == 24) {
	5664	+ easy = 1;
	5665	+ } else if (info.bpp == 32) {
	5666	+ if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
	5667	+ easy = 2;
	5668	+ }
	5669	+ if (!easy) {
	5670	+ if (!mr \|\| !mg \|\| !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
	5671	+ // right shift amt to put high bit in position #7
	5672	+ rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
	5673	+ gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
	5674	+ bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
	5675	+ ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
	5676	+ if (rcount > 8 \|\| gcount > 8 \|\| bcount > 8 \|\| acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
	5677	+ }
	5678	+ for (j=0; j < (int) s->img_y; ++j) {
	5679	+ if (easy) {
	5680	+ for (i=0; i < (int) s->img_x; ++i) {
	5681	+ unsigned char a;
	5682	+ out[z+2] = stbi__get8(s);
	5683	+ out[z+1] = stbi__get8(s);
	5684	+ out[z+0] = stbi__get8(s);
	5685	+ z += 3;
	5686	+ a = (easy == 2 ? stbi__get8(s) : 255);
	5687	+ all_a \|= a;
	5688	+ if (target == 4) out[z++] = a;
	5689	+ }
	5690	+ } else {
	5691	+ int bpp = info.bpp;
	5692	+ for (i=0; i < (int) s->img_x; ++i) {
	5693	+ stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s));
	5694	+ unsigned int a;
	5695	+ out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
	5696	+ out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
	5697	+ out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
	5698	+ a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
	5699	+ all_a \|= a;
	5700	+ if (target == 4) out[z++] = STBI__BYTECAST(a);
	5701	+ }
	5702	+ }
	5703	+ stbi__skip(s, pad);
	5704	+ }
	5705	+ }
	5706	+
	5707	+ // if alpha channel is all 0s, replace with all 255s
	5708	+ if (target == 4 && all_a == 0)
	5709	+ for (i=4s->img_xs->img_y-1; i >= 0; i -= 4)
	5710	+ out[i] = 255;
	5711	+
	5712	+ if (flip_vertically) {
	5713	+ stbi_uc t;
	5714	+ for (j=0; j < (int) s->img_y>>1; ++j) {
	5715	+ stbi_uc p1 = out + j s->img_x*target;
	5716	+ stbi_uc p2 = out + (s->img_y-1-j)s->img_x*target;
	5717	+ for (i=0; i < (int) s->img_x*target; ++i) {
	5718	+ t = p1[i]; p1[i] = p2[i]; p2[i] = t;
	5719	+ }
	5720	+ }
	5721	+ }
	5722	+
	5723	+ if (req_comp && req_comp != target) {
	5724	+ out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
	5725	+ if (out == NULL) return out; // stbi__convert_format frees input on failure
	5726	+ }
	5727	+
	5728	+ *x = s->img_x;
	5729	+ *y = s->img_y;
	5730	+ if (comp) *comp = s->img_n;
	5731	+ return out;
	5732	+}
	5733	+#endif
	5734	+
	5735	+// Targa Truevision - TGA
	5736	+// by Jonathan Dummer
	5737	+#ifndef STBI_NO_TGA
	5738	+// returns STBI_rgb or whatever, 0 on error
	5739	+static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
	5740	+{
	5741	+ // only RGB or RGBA (incl. 16bit) or grey allowed
	5742	+ if (is_rgb16) *is_rgb16 = 0;
	5743	+ switch(bits_per_pixel) {
	5744	+ case 8: return STBI_grey;
	5745	+ case 16: if(is_grey) return STBI_grey_alpha;
	5746	+ // fallthrough
	5747	+ case 15: if(is_rgb16) *is_rgb16 = 1;
	5748	+ return STBI_rgb;
	5749	+ case 24: // fallthrough
	5750	+ case 32: return bits_per_pixel/8;
	5751	+ default: return 0;
	5752	+ }
	5753	+}
	5754	+
	5755	+static int stbi__tga_info(stbi__context s, int x, int y, int comp)
	5756	+{
	5757	+ int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
	5758	+ int sz, tga_colormap_type;
	5759	+ stbi__get8(s); // discard Offset
	5760	+ tga_colormap_type = stbi__get8(s); // colormap type
	5761	+ if( tga_colormap_type > 1 ) {
	5762	+ stbi__rewind(s);
	5763	+ return 0; // only RGB or indexed allowed
	5764	+ }
	5765	+ tga_image_type = stbi__get8(s); // image type
	5766	+ if ( tga_colormap_type == 1 ) { // colormapped (paletted) image
	5767	+ if (tga_image_type != 1 && tga_image_type != 9) {
	5768	+ stbi__rewind(s);
	5769	+ return 0;
	5770	+ }
	5771	+ stbi__skip(s,4); // skip index of first colormap entry and number of entries
	5772	+ sz = stbi__get8(s); // check bits per palette color entry
	5773	+ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) {
	5774	+ stbi__rewind(s);
	5775	+ return 0;
	5776	+ }
	5777	+ stbi__skip(s,4); // skip image x and y origin
	5778	+ tga_colormap_bpp = sz;
	5779	+ } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
	5780	+ if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) {
	5781	+ stbi__rewind(s);
	5782	+ return 0; // only RGB or grey allowed, +/- RLE
	5783	+ }
	5784	+ stbi__skip(s,9); // skip colormap specification and image x/y origin
	5785	+ tga_colormap_bpp = 0;
	5786	+ }
	5787	+ tga_w = stbi__get16le(s);
	5788	+ if( tga_w < 1 ) {
	5789	+ stbi__rewind(s);
	5790	+ return 0; // test width
	5791	+ }
	5792	+ tga_h = stbi__get16le(s);
	5793	+ if( tga_h < 1 ) {
	5794	+ stbi__rewind(s);
	5795	+ return 0; // test height
	5796	+ }
	5797	+ tga_bits_per_pixel = stbi__get8(s); // bits per pixel
	5798	+ stbi__get8(s); // ignore alpha bits
	5799	+ if (tga_colormap_bpp != 0) {
	5800	+ if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
	5801	+ // when using a colormap, tga_bits_per_pixel is the size of the indexes
	5802	+ // I don't think anything but 8 or 16bit indexes makes sense
	5803	+ stbi__rewind(s);
	5804	+ return 0;
	5805	+ }
	5806	+ tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
	5807	+ } else {
	5808	+ tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) \|\| (tga_image_type == 11), NULL);
	5809	+ }
	5810	+ if(!tga_comp) {
	5811	+ stbi__rewind(s);
	5812	+ return 0;
	5813	+ }
	5814	+ if (x) *x = tga_w;
	5815	+ if (y) *y = tga_h;
	5816	+ if (comp) *comp = tga_comp;
	5817	+ return 1; // seems to have passed everything
	5818	+}
	5819	+
	5820	+static int stbi__tga_test(stbi__context *s)
	5821	+{
	5822	+ int res = 0;
	5823	+ int sz, tga_color_type;
	5824	+ stbi__get8(s); // discard Offset
	5825	+ tga_color_type = stbi__get8(s); // color type
	5826	+ if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed
	5827	+ sz = stbi__get8(s); // image type
	5828	+ if ( tga_color_type == 1 ) { // colormapped (paletted) image
	5829	+ if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9
	5830	+ stbi__skip(s,4); // skip index of first colormap entry and number of entries
	5831	+ sz = stbi__get8(s); // check bits per palette color entry
	5832	+ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
	5833	+ stbi__skip(s,4); // skip image x and y origin
	5834	+ } else { // "normal" image w/o colormap
	5835	+ if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE
	5836	+ stbi__skip(s,9); // skip colormap specification and image x/y origin
	5837	+ }
	5838	+ if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width
	5839	+ if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height
	5840	+ sz = stbi__get8(s); // bits per pixel
	5841	+ if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index
	5842	+ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
	5843	+
	5844	+ res = 1; // if we got this far, everything's good and we can return 1 instead of 0
	5845	+
	5846	+errorEnd:
	5847	+ stbi__rewind(s);
	5848	+ return res;
	5849	+}
	5850	+
	5851	+// read 16bit value and convert to 24bit RGB
	5852	+static void stbi__tga_read_rgb16(stbi__context s, stbi_uc out)
	5853	+{
	5854	+ stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
	5855	+ stbi__uint16 fiveBitMask = 31;
	5856	+ // we have 3 channels with 5bits each
	5857	+ int r = (px >> 10) & fiveBitMask;
	5858	+ int g = (px >> 5) & fiveBitMask;
	5859	+ int b = px & fiveBitMask;
	5860	+ // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later
	5861	+ out[0] = (stbi_uc)((r * 255)/31);
	5862	+ out[1] = (stbi_uc)((g * 255)/31);
	5863	+ out[2] = (stbi_uc)((b * 255)/31);
	5864	+
	5865	+ // some people claim that the most significant bit might be used for alpha
	5866	+ // (possibly if an alpha-bit is set in the "image descriptor byte")
	5867	+ // but that only made 16bit test images completely translucent..
	5868	+ // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
	5869	+}
	5870	+
	5871	+static void stbi__tga_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	5872	+{
	5873	+ // read in the TGA header stuff
	5874	+ int tga_offset = stbi__get8(s);
	5875	+ int tga_indexed = stbi__get8(s);
	5876	+ int tga_image_type = stbi__get8(s);
	5877	+ int tga_is_RLE = 0;
	5878	+ int tga_palette_start = stbi__get16le(s);
	5879	+ int tga_palette_len = stbi__get16le(s);
	5880	+ int tga_palette_bits = stbi__get8(s);
	5881	+ int tga_x_origin = stbi__get16le(s);
	5882	+ int tga_y_origin = stbi__get16le(s);
	5883	+ int tga_width = stbi__get16le(s);
	5884	+ int tga_height = stbi__get16le(s);
	5885	+ int tga_bits_per_pixel = stbi__get8(s);
	5886	+ int tga_comp, tga_rgb16=0;
	5887	+ int tga_inverted = stbi__get8(s);
	5888	+ // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?)
	5889	+ // image data
	5890	+ unsigned char *tga_data;
	5891	+ unsigned char *tga_palette = NULL;
	5892	+ int i, j;
	5893	+ unsigned char raw_data[4] = {0};
	5894	+ int RLE_count = 0;
	5895	+ int RLE_repeating = 0;
	5896	+ int read_next_pixel = 1;
	5897	+ STBI_NOTUSED(ri);
	5898	+ STBI_NOTUSED(tga_x_origin); // @TODO
	5899	+ STBI_NOTUSED(tga_y_origin); // @TODO
	5900	+
	5901	+ if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	5902	+ if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	5903	+
	5904	+ // do a tiny bit of precessing
	5905	+ if ( tga_image_type >= 8 )
	5906	+ {
	5907	+ tga_image_type -= 8;
	5908	+ tga_is_RLE = 1;
	5909	+ }
	5910	+ tga_inverted = 1 - ((tga_inverted >> 5) & 1);
	5911	+
	5912	+ // If I'm paletted, then I'll use the number of bits from the palette
	5913	+ if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
	5914	+ else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
	5915	+
	5916	+ if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency
	5917	+ return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
	5918	+
	5919	+ // tga info
	5920	+ *x = tga_width;
	5921	+ *y = tga_height;
	5922	+ if (comp) *comp = tga_comp;
	5923	+
	5924	+ if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
	5925	+ return stbi__errpuc("too large", "Corrupt TGA");
	5926	+
	5927	+ tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
	5928	+ if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
	5929	+
	5930	+ // skip to the data's starting position (offset usually = 0)
	5931	+ stbi__skip(s, tga_offset );
	5932	+
	5933	+ if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) {
	5934	+ for (i=0; i < tga_height; ++i) {
	5935	+ int row = tga_inverted ? tga_height -i - 1 : i;
	5936	+ stbi_uc tga_row = tga_data + rowtga_width*tga_comp;
	5937	+ stbi__getn(s, tga_row, tga_width * tga_comp);
	5938	+ }
	5939	+ } else {
	5940	+ // do I need to load a palette?
	5941	+ if ( tga_indexed)
	5942	+ {
	5943	+ if (tga_palette_len == 0) { /* you have to have at least one entry! */
	5944	+ STBI_FREE(tga_data);
	5945	+ return stbi__errpuc("bad palette", "Corrupt TGA");
	5946	+ }
	5947	+
	5948	+ // any data to skip? (offset usually = 0)
	5949	+ stbi__skip(s, tga_palette_start );
	5950	+ // load the palette
	5951	+ tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
	5952	+ if (!tga_palette) {
	5953	+ STBI_FREE(tga_data);
	5954	+ return stbi__errpuc("outofmem", "Out of memory");
	5955	+ }
	5956	+ if (tga_rgb16) {
	5957	+ stbi_uc *pal_entry = tga_palette;
	5958	+ STBI_ASSERT(tga_comp == STBI_rgb);
	5959	+ for (i=0; i < tga_palette_len; ++i) {
	5960	+ stbi__tga_read_rgb16(s, pal_entry);
	5961	+ pal_entry += tga_comp;
	5962	+ }
	5963	+ } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
	5964	+ STBI_FREE(tga_data);
	5965	+ STBI_FREE(tga_palette);
	5966	+ return stbi__errpuc("bad palette", "Corrupt TGA");
	5967	+ }
	5968	+ }
	5969	+ // load the data
	5970	+ for (i=0; i < tga_width * tga_height; ++i)
	5971	+ {
	5972	+ // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
	5973	+ if ( tga_is_RLE )
	5974	+ {
	5975	+ if ( RLE_count == 0 )
	5976	+ {
	5977	+ // yep, get the next byte as a RLE command
	5978	+ int RLE_cmd = stbi__get8(s);
	5979	+ RLE_count = 1 + (RLE_cmd & 127);
	5980	+ RLE_repeating = RLE_cmd >> 7;
	5981	+ read_next_pixel = 1;
	5982	+ } else if ( !RLE_repeating )
	5983	+ {
	5984	+ read_next_pixel = 1;
	5985	+ }
	5986	+ } else
	5987	+ {
	5988	+ read_next_pixel = 1;
	5989	+ }
	5990	+ // OK, if I need to read a pixel, do it now
	5991	+ if ( read_next_pixel )
	5992	+ {
	5993	+ // load however much data we did have
	5994	+ if ( tga_indexed )
	5995	+ {
	5996	+ // read in index, then perform the lookup
	5997	+ int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
	5998	+ if ( pal_idx >= tga_palette_len ) {
	5999	+ // invalid index
	6000	+ pal_idx = 0;
	6001	+ }
	6002	+ pal_idx *= tga_comp;
	6003	+ for (j = 0; j < tga_comp; ++j) {
	6004	+ raw_data[j] = tga_palette[pal_idx+j];
	6005	+ }
	6006	+ } else if(tga_rgb16) {
	6007	+ STBI_ASSERT(tga_comp == STBI_rgb);
	6008	+ stbi__tga_read_rgb16(s, raw_data);
	6009	+ } else {
	6010	+ // read in the data raw
	6011	+ for (j = 0; j < tga_comp; ++j) {
	6012	+ raw_data[j] = stbi__get8(s);
	6013	+ }
	6014	+ }
	6015	+ // clear the reading flag for the next pixel
	6016	+ read_next_pixel = 0;
	6017	+ } // end of reading a pixel
	6018	+
	6019	+ // copy data
	6020	+ for (j = 0; j < tga_comp; ++j)
	6021	+ tga_data[i*tga_comp+j] = raw_data[j];
	6022	+
	6023	+ // in case we're in RLE mode, keep counting down
	6024	+ --RLE_count;
	6025	+ }
	6026	+ // do I need to invert the image?
	6027	+ if ( tga_inverted )
	6028	+ {
	6029	+ for (j = 0; j*2 < tga_height; ++j)
	6030	+ {
	6031	+ int index1 = j * tga_width * tga_comp;
	6032	+ int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
	6033	+ for (i = tga_width * tga_comp; i > 0; --i)
	6034	+ {
	6035	+ unsigned char temp = tga_data[index1];
	6036	+ tga_data[index1] = tga_data[index2];
	6037	+ tga_data[index2] = temp;
	6038	+ ++index1;
	6039	+ ++index2;
	6040	+ }
	6041	+ }
	6042	+ }
	6043	+ // clear my palette, if I had one
	6044	+ if ( tga_palette != NULL )
	6045	+ {
	6046	+ STBI_FREE( tga_palette );
	6047	+ }
	6048	+ }
	6049	+
	6050	+ // swap RGB - if the source data was RGB16, it already is in the right order
	6051	+ if (tga_comp >= 3 && !tga_rgb16)
	6052	+ {
	6053	+ unsigned char* tga_pixel = tga_data;
	6054	+ for (i=0; i < tga_width * tga_height; ++i)
	6055	+ {
	6056	+ unsigned char temp = tga_pixel[0];
	6057	+ tga_pixel[0] = tga_pixel[2];
	6058	+ tga_pixel[2] = temp;
	6059	+ tga_pixel += tga_comp;
	6060	+ }
	6061	+ }
	6062	+
	6063	+ // convert to target component count
	6064	+ if (req_comp && req_comp != tga_comp)
	6065	+ tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
	6066	+
	6067	+ // the things I do to get rid of an error message, and yet keep
	6068	+ // Microsoft's C compilers happy... [8^(
	6069	+ tga_palette_start = tga_palette_len = tga_palette_bits =
	6070	+ tga_x_origin = tga_y_origin = 0;
	6071	+ STBI_NOTUSED(tga_palette_start);
	6072	+ // OK, done
	6073	+ return tga_data;
	6074	+}
	6075	+#endif
	6076	+
	6077	+// *************************************************************************************************
	6078	+// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
	6079	+
	6080	+#ifndef STBI_NO_PSD
	6081	+static int stbi__psd_test(stbi__context *s)
	6082	+{
	6083	+ int r = (stbi__get32be(s) == 0x38425053);
	6084	+ stbi__rewind(s);
	6085	+ return r;
	6086	+}
	6087	+
	6088	+static int stbi__psd_decode_rle(stbi__context s, stbi_uc p, int pixelCount)
	6089	+{
	6090	+ int count, nleft, len;
	6091	+
	6092	+ count = 0;
	6093	+ while ((nleft = pixelCount - count) > 0) {
	6094	+ len = stbi__get8(s);
	6095	+ if (len == 128) {
	6096	+ // No-op.
	6097	+ } else if (len < 128) {
	6098	+ // Copy next len+1 bytes literally.
	6099	+ len++;
	6100	+ if (len > nleft) return 0; // corrupt data
	6101	+ count += len;
	6102	+ while (len) {
	6103	+ *p = stbi__get8(s);
	6104	+ p += 4;
	6105	+ len--;
	6106	+ }
	6107	+ } else if (len > 128) {
	6108	+ stbi_uc val;
	6109	+ // Next -len+1 bytes in the dest are replicated from next source byte.
	6110	+ // (Interpret len as a negative 8-bit int.)
	6111	+ len = 257 - len;
	6112	+ if (len > nleft) return 0; // corrupt data
	6113	+ val = stbi__get8(s);
	6114	+ count += len;
	6115	+ while (len) {
	6116	+ *p = val;
	6117	+ p += 4;
	6118	+ len--;
	6119	+ }
	6120	+ }
	6121	+ }
	6122	+
	6123	+ return 1;
	6124	+}
	6125	+
	6126	+static void stbi__psd_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri, int bpc)
	6127	+{
	6128	+ int pixelCount;
	6129	+ int channelCount, compression;
	6130	+ int channel, i;
	6131	+ int bitdepth;
	6132	+ int w,h;
	6133	+ stbi_uc *out;
	6134	+ STBI_NOTUSED(ri);
	6135	+
	6136	+ // Check identifier
	6137	+ if (stbi__get32be(s) != 0x38425053) // "8BPS"
	6138	+ return stbi__errpuc("not PSD", "Corrupt PSD image");
	6139	+
	6140	+ // Check file type version.
	6141	+ if (stbi__get16be(s) != 1)
	6142	+ return stbi__errpuc("wrong version", "Unsupported version of PSD image");
	6143	+
	6144	+ // Skip 6 reserved bytes.
	6145	+ stbi__skip(s, 6 );
	6146	+
	6147	+ // Read the number of channels (R, G, B, A, etc).
	6148	+ channelCount = stbi__get16be(s);
	6149	+ if (channelCount < 0 \|\| channelCount > 16)
	6150	+ return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
	6151	+
	6152	+ // Read the rows and columns of the image.
	6153	+ h = stbi__get32be(s);
	6154	+ w = stbi__get32be(s);
	6155	+
	6156	+ if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	6157	+ if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	6158	+
	6159	+ // Make sure the depth is 8 bits.
	6160	+ bitdepth = stbi__get16be(s);
	6161	+ if (bitdepth != 8 && bitdepth != 16)
	6162	+ return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
	6163	+
	6164	+ // Make sure the color mode is RGB.
	6165	+ // Valid options are:
	6166	+ // 0: Bitmap
	6167	+ // 1: Grayscale
	6168	+ // 2: Indexed color
	6169	+ // 3: RGB color
	6170	+ // 4: CMYK color
	6171	+ // 7: Multichannel
	6172	+ // 8: Duotone
	6173	+ // 9: Lab color
	6174	+ if (stbi__get16be(s) != 3)
	6175	+ return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
	6176	+
	6177	+ // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.)
	6178	+ stbi__skip(s,stbi__get32be(s) );
	6179	+
	6180	+ // Skip the image resources. (resolution, pen tool paths, etc)
	6181	+ stbi__skip(s, stbi__get32be(s) );
	6182	+
	6183	+ // Skip the reserved data.
	6184	+ stbi__skip(s, stbi__get32be(s) );
	6185	+
	6186	+ // Find out if the data is compressed.
	6187	+ // Known values:
	6188	+ // 0: no compression
	6189	+ // 1: RLE compressed
	6190	+ compression = stbi__get16be(s);
	6191	+ if (compression > 1)
	6192	+ return stbi__errpuc("bad compression", "PSD has an unknown compression format");
	6193	+
	6194	+ // Check size
	6195	+ if (!stbi__mad3sizes_valid(4, w, h, 0))
	6196	+ return stbi__errpuc("too large", "Corrupt PSD");
	6197	+
	6198	+ // Create the destination image.
	6199	+
	6200	+ if (!compression && bitdepth == 16 && bpc == 16) {
	6201	+ out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0);
	6202	+ ri->bits_per_channel = 16;
	6203	+ } else
	6204	+ out = (stbi_uc ) stbi__malloc(4 w*h);
	6205	+
	6206	+ if (!out) return stbi__errpuc("outofmem", "Out of memory");
	6207	+ pixelCount = w*h;
	6208	+
	6209	+ // Initialize the data to zero.
	6210	+ //memset( out, 0, pixelCount * 4 );
	6211	+
	6212	+ // Finally, the image data.
	6213	+ if (compression) {
	6214	+ // RLE as used by .PSD and .TIFF
	6215	+ // Loop until you get the number of unpacked bytes you are expecting:
	6216	+ // Read the next source byte into n.
	6217	+ // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
	6218	+ // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
	6219	+ // Else if n is 128, noop.
	6220	+ // Endloop
	6221	+
	6222	+ // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
	6223	+ // which we're going to just skip.
	6224	+ stbi__skip(s, h * channelCount * 2 );
	6225	+
	6226	+ // Read the RLE data by channel.
	6227	+ for (channel = 0; channel < 4; channel++) {
	6228	+ stbi_uc *p;
	6229	+
	6230	+ p = out+channel;
	6231	+ if (channel >= channelCount) {
	6232	+ // Fill this channel with default data.
	6233	+ for (i = 0; i < pixelCount; i++, p += 4)
	6234	+ *p = (channel == 3 ? 255 : 0);
	6235	+ } else {
	6236	+ // Read the RLE data.
	6237	+ if (!stbi__psd_decode_rle(s, p, pixelCount)) {
	6238	+ STBI_FREE(out);
	6239	+ return stbi__errpuc("corrupt", "bad RLE data");
	6240	+ }
	6241	+ }
	6242	+ }
	6243	+
	6244	+ } else {
	6245	+ // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...)
	6246	+ // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image.
	6247	+
	6248	+ // Read the data by channel.
	6249	+ for (channel = 0; channel < 4; channel++) {
	6250	+ if (channel >= channelCount) {
	6251	+ // Fill this channel with default data.
	6252	+ if (bitdepth == 16 && bpc == 16) {
	6253	+ stbi__uint16 q = ((stbi__uint16 ) out) + channel;
	6254	+ stbi__uint16 val = channel == 3 ? 65535 : 0;
	6255	+ for (i = 0; i < pixelCount; i++, q += 4)
	6256	+ *q = val;
	6257	+ } else {
	6258	+ stbi_uc *p = out+channel;
	6259	+ stbi_uc val = channel == 3 ? 255 : 0;
	6260	+ for (i = 0; i < pixelCount; i++, p += 4)
	6261	+ *p = val;
	6262	+ }
	6263	+ } else {
	6264	+ if (ri->bits_per_channel == 16) { // output bpc
	6265	+ stbi__uint16 q = ((stbi__uint16 ) out) + channel;
	6266	+ for (i = 0; i < pixelCount; i++, q += 4)
	6267	+ *q = (stbi__uint16) stbi__get16be(s);
	6268	+ } else {
	6269	+ stbi_uc *p = out+channel;
	6270	+ if (bitdepth == 16) { // input bpc
	6271	+ for (i = 0; i < pixelCount; i++, p += 4)
	6272	+ *p = (stbi_uc) (stbi__get16be(s) >> 8);
	6273	+ } else {
	6274	+ for (i = 0; i < pixelCount; i++, p += 4)
	6275	+ *p = stbi__get8(s);
	6276	+ }
	6277	+ }
	6278	+ }
	6279	+ }
	6280	+ }
	6281	+
	6282	+ // remove weird white matte from PSD
	6283	+ if (channelCount >= 4) {
	6284	+ if (ri->bits_per_channel == 16) {
	6285	+ for (i=0; i < w*h; ++i) {
	6286	+ stbi__uint16 pixel = (stbi__uint16 ) out + 4*i;
	6287	+ if (pixel[3] != 0 && pixel[3] != 65535) {
	6288	+ float a = pixel[3] / 65535.0f;
	6289	+ float ra = 1.0f / a;
	6290	+ float inv_a = 65535.0f * (1 - ra);
	6291	+ pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a);
	6292	+ pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a);
	6293	+ pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a);
	6294	+ }
	6295	+ }
	6296	+ } else {
	6297	+ for (i=0; i < w*h; ++i) {
	6298	+ unsigned char pixel = out + 4i;
	6299	+ if (pixel[3] != 0 && pixel[3] != 255) {
	6300	+ float a = pixel[3] / 255.0f;
	6301	+ float ra = 1.0f / a;
	6302	+ float inv_a = 255.0f * (1 - ra);
	6303	+ pixel[0] = (unsigned char) (pixel[0]*ra + inv_a);
	6304	+ pixel[1] = (unsigned char) (pixel[1]*ra + inv_a);
	6305	+ pixel[2] = (unsigned char) (pixel[2]*ra + inv_a);
	6306	+ }
	6307	+ }
	6308	+ }
	6309	+ }
	6310	+
	6311	+ // convert to desired output format
	6312	+ if (req_comp && req_comp != 4) {
	6313	+ if (ri->bits_per_channel == 16)
	6314	+ out = (stbi_uc ) stbi__convert_format16((stbi__uint16 ) out, 4, req_comp, w, h);
	6315	+ else
	6316	+ out = stbi__convert_format(out, 4, req_comp, w, h);
	6317	+ if (out == NULL) return out; // stbi__convert_format frees input on failure
	6318	+ }
	6319	+
	6320	+ if (comp) *comp = 4;
	6321	+ *y = h;
	6322	+ *x = w;
	6323	+
	6324	+ return out;
	6325	+}
	6326	+#endif
	6327	+
	6328	+// *************************************************************************************************
	6329	+// Softimage PIC loader
	6330	+// by Tom Seddon
	6331	+//
	6332	+// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
	6333	+// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
	6334	+
	6335	+#ifndef STBI_NO_PIC
	6336	+static int stbi__pic_is4(stbi__context s,const char str)
	6337	+{
	6338	+ int i;
	6339	+ for (i=0; i<4; ++i)
	6340	+ if (stbi__get8(s) != (stbi_uc)str[i])
	6341	+ return 0;
	6342	+
	6343	+ return 1;
	6344	+}
	6345	+
	6346	+static int stbi__pic_test_core(stbi__context *s)
	6347	+{
	6348	+ int i;
	6349	+
	6350	+ if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
	6351	+ return 0;
	6352	+
	6353	+ for(i=0;i<84;++i)
	6354	+ stbi__get8(s);
	6355	+
	6356	+ if (!stbi__pic_is4(s,"PICT"))
	6357	+ return 0;
	6358	+
	6359	+ return 1;
	6360	+}
	6361	+
	6362	+typedef struct
	6363	+{
	6364	+ stbi_uc size,type,channel;
	6365	+} stbi__pic_packet;
	6366	+
	6367	+static stbi_uc stbi__readval(stbi__context s, int channel, stbi_uc *dest)
	6368	+{
	6369	+ int mask=0x80, i;
	6370	+
	6371	+ for (i=0; i<4; ++i, mask>>=1) {
	6372	+ if (channel & mask) {
	6373	+ if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
	6374	+ dest[i]=stbi__get8(s);
	6375	+ }
	6376	+ }
	6377	+
	6378	+ return dest;
	6379	+}
	6380	+
	6381	+static void stbi__copyval(int channel,stbi_uc dest,const stbi_uc src)
	6382	+{
	6383	+ int mask=0x80,i;
	6384	+
	6385	+ for (i=0;i<4; ++i, mask>>=1)
	6386	+ if (channel&mask)
	6387	+ dest[i]=src[i];
	6388	+}
	6389	+
	6390	+static stbi_uc stbi__pic_load_core(stbi__context s,int width,int height,int comp, stbi_uc result)
	6391	+{
	6392	+ int act_comp=0,num_packets=0,y,chained;
	6393	+ stbi__pic_packet packets[10];
	6394	+
	6395	+ // this will (should...) cater for even some bizarre stuff like having data
	6396	+ // for the same channel in multiple packets.
	6397	+ do {
	6398	+ stbi__pic_packet *packet;
	6399	+
	6400	+ if (num_packets==sizeof(packets)/sizeof(packets[0]))
	6401	+ return stbi__errpuc("bad format","too many packets");
	6402	+
	6403	+ packet = &packets[num_packets++];
	6404	+
	6405	+ chained = stbi__get8(s);
	6406	+ packet->size = stbi__get8(s);
	6407	+ packet->type = stbi__get8(s);
	6408	+ packet->channel = stbi__get8(s);
	6409	+
	6410	+ act_comp \|= packet->channel;
	6411	+
	6412	+ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)");
	6413	+ if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp");
	6414	+ } while (chained);
	6415	+
	6416	+ *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
	6417	+
	6418	+ for(y=0; y<height; ++y) {
	6419	+ int packet_idx;
	6420	+
	6421	+ for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
	6422	+ stbi__pic_packet *packet = &packets[packet_idx];
	6423	+ stbi_uc dest = result+ywidth*4;
	6424	+
	6425	+ switch (packet->type) {
	6426	+ default:
	6427	+ return stbi__errpuc("bad format","packet has bad compression type");
	6428	+
	6429	+ case 0: {//uncompressed
	6430	+ int x;
	6431	+
	6432	+ for(x=0;x<width;++x, dest+=4)
	6433	+ if (!stbi__readval(s,packet->channel,dest))
	6434	+ return 0;
	6435	+ break;
	6436	+ }
	6437	+
	6438	+ case 1://Pure RLE
	6439	+ {
	6440	+ int left=width, i;
	6441	+
	6442	+ while (left>0) {
	6443	+ stbi_uc count,value[4];
	6444	+
	6445	+ count=stbi__get8(s);
	6446	+ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)");
	6447	+
	6448	+ if (count > left)
	6449	+ count = (stbi_uc) left;
	6450	+
	6451	+ if (!stbi__readval(s,packet->channel,value)) return 0;
	6452	+
	6453	+ for(i=0; i<count; ++i,dest+=4)
	6454	+ stbi__copyval(packet->channel,dest,value);
	6455	+ left -= count;
	6456	+ }
	6457	+ }
	6458	+ break;
	6459	+
	6460	+ case 2: {//Mixed RLE
	6461	+ int left=width;
	6462	+ while (left>0) {
	6463	+ int count = stbi__get8(s), i;
	6464	+ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)");
	6465	+
	6466	+ if (count >= 128) { // Repeated
	6467	+ stbi_uc value[4];
	6468	+
	6469	+ if (count==128)
	6470	+ count = stbi__get16be(s);
	6471	+ else
	6472	+ count -= 127;
	6473	+ if (count > left)
	6474	+ return stbi__errpuc("bad file","scanline overrun");
	6475	+
	6476	+ if (!stbi__readval(s,packet->channel,value))
	6477	+ return 0;
	6478	+
	6479	+ for(i=0;i<count;++i, dest += 4)
	6480	+ stbi__copyval(packet->channel,dest,value);
	6481	+ } else { // Raw
	6482	+ ++count;
	6483	+ if (count>left) return stbi__errpuc("bad file","scanline overrun");
	6484	+
	6485	+ for(i=0;i<count;++i, dest+=4)
	6486	+ if (!stbi__readval(s,packet->channel,dest))
	6487	+ return 0;
	6488	+ }
	6489	+ left-=count;
	6490	+ }
	6491	+ break;
	6492	+ }
	6493	+ }
	6494	+ }
	6495	+ }
	6496	+
	6497	+ return result;
	6498	+}
	6499	+
	6500	+static void stbi__pic_load(stbi__context s,int px,int py,int comp,int req_comp, stbi__result_info ri)
	6501	+{
	6502	+ stbi_uc *result;
	6503	+ int i, x,y, internal_comp;
	6504	+ STBI_NOTUSED(ri);
	6505	+
	6506	+ if (!comp) comp = &internal_comp;
	6507	+
	6508	+ for (i=0; i<92; ++i)
	6509	+ stbi__get8(s);
	6510	+
	6511	+ x = stbi__get16be(s);
	6512	+ y = stbi__get16be(s);
	6513	+
	6514	+ if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	6515	+ if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	6516	+
	6517	+ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)");
	6518	+ if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode");
	6519	+
	6520	+ stbi__get32be(s); //skip `ratio'
	6521	+ stbi__get16be(s); //skip `fields'
	6522	+ stbi__get16be(s); //skip `pad'
	6523	+
	6524	+ // intermediate buffer is RGBA
	6525	+ result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
	6526	+ if (!result) return stbi__errpuc("outofmem", "Out of memory");
	6527	+ memset(result, 0xff, xy4);
	6528	+
	6529	+ if (!stbi__pic_load_core(s,x,y,comp, result)) {
	6530	+ STBI_FREE(result);
	6531	+ result=0;
	6532	+ }
	6533	+ *px = x;
	6534	+ *py = y;
	6535	+ if (req_comp == 0) req_comp = *comp;
	6536	+ result=stbi__convert_format(result,4,req_comp,x,y);
	6537	+
	6538	+ return result;
	6539	+}
	6540	+
	6541	+static int stbi__pic_test(stbi__context *s)
	6542	+{
	6543	+ int r = stbi__pic_test_core(s);
	6544	+ stbi__rewind(s);
	6545	+ return r;
	6546	+}
	6547	+#endif
	6548	+
	6549	+// *************************************************************************************************
	6550	+// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
	6551	+
	6552	+#ifndef STBI_NO_GIF
	6553	+typedef struct
	6554	+{
	6555	+ stbi__int16 prefix;
	6556	+ stbi_uc first;
	6557	+ stbi_uc suffix;
	6558	+} stbi__gif_lzw;
	6559	+
	6560	+typedef struct
	6561	+{
	6562	+ int w,h;
	6563	+ stbi_uc *out; // output buffer (always 4 components)
	6564	+ stbi_uc *background; // The current "background" as far as a gif is concerned
	6565	+ stbi_uc *history;
	6566	+ int flags, bgindex, ratio, transparent, eflags;
	6567	+ stbi_uc pal[256][4];
	6568	+ stbi_uc lpal[256][4];
	6569	+ stbi__gif_lzw codes[8192];
	6570	+ stbi_uc *color_table;
	6571	+ int parse, step;
	6572	+ int lflags;
	6573	+ int start_x, start_y;
	6574	+ int max_x, max_y;
	6575	+ int cur_x, cur_y;
	6576	+ int line_size;
	6577	+ int delay;
	6578	+} stbi__gif;
	6579	+
	6580	+static int stbi__gif_test_raw(stbi__context *s)
	6581	+{
	6582	+ int sz;
	6583	+ if (stbi__get8(s) != 'G' \|\| stbi__get8(s) != 'I' \|\| stbi__get8(s) != 'F' \|\| stbi__get8(s) != '8') return 0;
	6584	+ sz = stbi__get8(s);
	6585	+ if (sz != '9' && sz != '7') return 0;
	6586	+ if (stbi__get8(s) != 'a') return 0;
	6587	+ return 1;
	6588	+}
	6589	+
	6590	+static int stbi__gif_test(stbi__context *s)
	6591	+{
	6592	+ int r = stbi__gif_test_raw(s);
	6593	+ stbi__rewind(s);
	6594	+ return r;
	6595	+}
	6596	+
	6597	+static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
	6598	+{
	6599	+ int i;
	6600	+ for (i=0; i < num_entries; ++i) {
	6601	+ pal[i][2] = stbi__get8(s);
	6602	+ pal[i][1] = stbi__get8(s);
	6603	+ pal[i][0] = stbi__get8(s);
	6604	+ pal[i][3] = transp == i ? 0 : 255;
	6605	+ }
	6606	+}
	6607	+
	6608	+static int stbi__gif_header(stbi__context s, stbi__gif g, int *comp, int is_info)
	6609	+{
	6610	+ stbi_uc version;
	6611	+ if (stbi__get8(s) != 'G' \|\| stbi__get8(s) != 'I' \|\| stbi__get8(s) != 'F' \|\| stbi__get8(s) != '8')
	6612	+ return stbi__err("not GIF", "Corrupt GIF");
	6613	+
	6614	+ version = stbi__get8(s);
	6615	+ if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF");
	6616	+ if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF");
	6617	+
	6618	+ stbi__g_failure_reason = "";
	6619	+ g->w = stbi__get16le(s);
	6620	+ g->h = stbi__get16le(s);
	6621	+ g->flags = stbi__get8(s);
	6622	+ g->bgindex = stbi__get8(s);
	6623	+ g->ratio = stbi__get8(s);
	6624	+ g->transparent = -1;
	6625	+
	6626	+ if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
	6627	+ if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
	6628	+
	6629	+ if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments
	6630	+
	6631	+ if (is_info) return 1;
	6632	+
	6633	+ if (g->flags & 0x80)
	6634	+ stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
	6635	+
	6636	+ return 1;
	6637	+}
	6638	+
	6639	+static int stbi__gif_info_raw(stbi__context s, int x, int y, int comp)
	6640	+{
	6641	+ stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
	6642	+ if (!g) return stbi__err("outofmem", "Out of memory");
	6643	+ if (!stbi__gif_header(s, g, comp, 1)) {
	6644	+ STBI_FREE(g);
	6645	+ stbi__rewind( s );
	6646	+ return 0;
	6647	+ }
	6648	+ if (x) *x = g->w;
	6649	+ if (y) *y = g->h;
	6650	+ STBI_FREE(g);
	6651	+ return 1;
	6652	+}
	6653	+
	6654	+static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
	6655	+{
	6656	+ stbi_uc p, c;
	6657	+ int idx;
	6658	+
	6659	+ // recurse to decode the prefixes, since the linked-list is backwards,
	6660	+ // and working backwards through an interleaved image would be nasty
	6661	+ if (g->codes[code].prefix >= 0)
	6662	+ stbi__out_gif_code(g, g->codes[code].prefix);
	6663	+
	6664	+ if (g->cur_y >= g->max_y) return;
	6665	+
	6666	+ idx = g->cur_x + g->cur_y;
	6667	+ p = &g->out[idx];
	6668	+ g->history[idx / 4] = 1;
	6669	+
	6670	+ c = &g->color_table[g->codes[code].suffix * 4];
	6671	+ if (c[3] > 128) { // don't render transparent pixels;
	6672	+ p[0] = c[2];
	6673	+ p[1] = c[1];
	6674	+ p[2] = c[0];
	6675	+ p[3] = c[3];
	6676	+ }
	6677	+ g->cur_x += 4;
	6678	+
	6679	+ if (g->cur_x >= g->max_x) {
	6680	+ g->cur_x = g->start_x;
	6681	+ g->cur_y += g->step;
	6682	+
	6683	+ while (g->cur_y >= g->max_y && g->parse > 0) {
	6684	+ g->step = (1 << g->parse) * g->line_size;
	6685	+ g->cur_y = g->start_y + (g->step >> 1);
	6686	+ --g->parse;
	6687	+ }
	6688	+ }
	6689	+}
	6690	+
	6691	+static stbi_uc stbi__process_gif_raster(stbi__context s, stbi__gif *g)
	6692	+{
	6693	+ stbi_uc lzw_cs;
	6694	+ stbi__int32 len, init_code;
	6695	+ stbi__uint32 first;
	6696	+ stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
	6697	+ stbi__gif_lzw *p;
	6698	+
	6699	+ lzw_cs = stbi__get8(s);
	6700	+ if (lzw_cs > 12) return NULL;
	6701	+ clear = 1 << lzw_cs;
	6702	+ first = 1;
	6703	+ codesize = lzw_cs + 1;
	6704	+ codemask = (1 << codesize) - 1;
	6705	+ bits = 0;
	6706	+ valid_bits = 0;
	6707	+ for (init_code = 0; init_code < clear; init_code++) {
	6708	+ g->codes[init_code].prefix = -1;
	6709	+ g->codes[init_code].first = (stbi_uc) init_code;
	6710	+ g->codes[init_code].suffix = (stbi_uc) init_code;
	6711	+ }
	6712	+
	6713	+ // support no starting clear code
	6714	+ avail = clear+2;
	6715	+ oldcode = -1;
	6716	+
	6717	+ len = 0;
	6718	+ for(;;) {
	6719	+ if (valid_bits < codesize) {
	6720	+ if (len == 0) {
	6721	+ len = stbi__get8(s); // start new block
	6722	+ if (len == 0)
	6723	+ return g->out;
	6724	+ }
	6725	+ --len;
	6726	+ bits \|= (stbi__int32) stbi__get8(s) << valid_bits;
	6727	+ valid_bits += 8;
	6728	+ } else {
	6729	+ stbi__int32 code = bits & codemask;
	6730	+ bits >>= codesize;
	6731	+ valid_bits -= codesize;
	6732	+ // @OPTIMIZE: is there some way we can accelerate the non-clear path?
	6733	+ if (code == clear) { // clear code
	6734	+ codesize = lzw_cs + 1;
	6735	+ codemask = (1 << codesize) - 1;
	6736	+ avail = clear + 2;
	6737	+ oldcode = -1;
	6738	+ first = 0;
	6739	+ } else if (code == clear + 1) { // end of stream code
	6740	+ stbi__skip(s, len);
	6741	+ while ((len = stbi__get8(s)) > 0)
	6742	+ stbi__skip(s,len);
	6743	+ return g->out;
	6744	+ } else if (code <= avail) {
	6745	+ if (first) {
	6746	+ return stbi__errpuc("no clear code", "Corrupt GIF");
	6747	+ }
	6748	+
	6749	+ if (oldcode >= 0) {
	6750	+ p = &g->codes[avail++];
	6751	+ if (avail > 8192) {
	6752	+ return stbi__errpuc("too many codes", "Corrupt GIF");
	6753	+ }
	6754	+
	6755	+ p->prefix = (stbi__int16) oldcode;
	6756	+ p->first = g->codes[oldcode].first;
	6757	+ p->suffix = (code == avail) ? p->first : g->codes[code].first;
	6758	+ } else if (code == avail)
	6759	+ return stbi__errpuc("illegal code in raster", "Corrupt GIF");
	6760	+
	6761	+ stbi__out_gif_code(g, (stbi__uint16) code);
	6762	+
	6763	+ if ((avail & codemask) == 0 && avail <= 0x0FFF) {
	6764	+ codesize++;
	6765	+ codemask = (1 << codesize) - 1;
	6766	+ }
	6767	+
	6768	+ oldcode = code;
	6769	+ } else {
	6770	+ return stbi__errpuc("illegal code in raster", "Corrupt GIF");
	6771	+ }
	6772	+ }
	6773	+ }
	6774	+}
	6775	+
	6776	+// this function is designed to support animated gifs, although stb_image doesn't support it
	6777	+// two back is the image from two frames ago, used for a very specific disposal format
	6778	+static stbi_uc stbi__gif_load_next(stbi__context s, stbi__gif g, int comp, int req_comp, stbi_uc *two_back)
	6779	+{
	6780	+ int dispose;
	6781	+ int first_frame;
	6782	+ int pi;
	6783	+ int pcount;
	6784	+ STBI_NOTUSED(req_comp);
	6785	+
	6786	+ // on first frame, any non-written pixels get the background colour (non-transparent)
	6787	+ first_frame = 0;
	6788	+ if (g->out == 0) {
	6789	+ if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
	6790	+ if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
	6791	+ return stbi__errpuc("too large", "GIF image is too large");
	6792	+ pcount = g->w * g->h;
	6793	+ g->out = (stbi_uc ) stbi__malloc(4 pcount);
	6794	+ g->background = (stbi_uc ) stbi__malloc(4 pcount);
	6795	+ g->history = (stbi_uc *) stbi__malloc(pcount);
	6796	+ if (!g->out \|\| !g->background \|\| !g->history)
	6797	+ return stbi__errpuc("outofmem", "Out of memory");
	6798	+
	6799	+ // image is treated as "transparent" at the start - ie, nothing overwrites the current background;
	6800	+ // background colour is only used for pixels that are not rendered first frame, after that "background"
	6801	+ // color refers to the color that was there the previous frame.
	6802	+ memset(g->out, 0x00, 4 * pcount);
	6803	+ memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent)
	6804	+ memset(g->history, 0x00, pcount); // pixels that were affected previous frame
	6805	+ first_frame = 1;
	6806	+ } else {
	6807	+ // second frame - how do we dispose of the previous one?
	6808	+ dispose = (g->eflags & 0x1C) >> 2;
	6809	+ pcount = g->w * g->h;
	6810	+
	6811	+ if ((dispose == 3) && (two_back == 0)) {
	6812	+ dispose = 2; // if I don't have an image to revert back to, default to the old background
	6813	+ }
	6814	+
	6815	+ if (dispose == 3) { // use previous graphic
	6816	+ for (pi = 0; pi < pcount; ++pi) {
	6817	+ if (g->history[pi]) {
	6818	+ memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 );
	6819	+ }
	6820	+ }
	6821	+ } else if (dispose == 2) {
	6822	+ // restore what was changed last frame to background before that frame;
	6823	+ for (pi = 0; pi < pcount; ++pi) {
	6824	+ if (g->history[pi]) {
	6825	+ memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 );
	6826	+ }
	6827	+ }
	6828	+ } else {
	6829	+ // This is a non-disposal case eithe way, so just
	6830	+ // leave the pixels as is, and they will become the new background
	6831	+ // 1: do not dispose
	6832	+ // 0: not specified.
	6833	+ }
	6834	+
	6835	+ // background is what out is after the undoing of the previou frame;
	6836	+ memcpy( g->background, g->out, 4 * g->w * g->h );
	6837	+ }
	6838	+
	6839	+ // clear my history;
	6840	+ memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame
	6841	+
	6842	+ for (;;) {
	6843	+ int tag = stbi__get8(s);
	6844	+ switch (tag) {
	6845	+ case 0x2C: /* Image Descriptor */
	6846	+ {
	6847	+ stbi__int32 x, y, w, h;
	6848	+ stbi_uc *o;
	6849	+
	6850	+ x = stbi__get16le(s);
	6851	+ y = stbi__get16le(s);
	6852	+ w = stbi__get16le(s);
	6853	+ h = stbi__get16le(s);
	6854	+ if (((x + w) > (g->w)) \|\| ((y + h) > (g->h)))
	6855	+ return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
	6856	+
	6857	+ g->line_size = g->w * 4;
	6858	+ g->start_x = x * 4;
	6859	+ g->start_y = y * g->line_size;
	6860	+ g->max_x = g->start_x + w * 4;
	6861	+ g->max_y = g->start_y + h * g->line_size;
	6862	+ g->cur_x = g->start_x;
	6863	+ g->cur_y = g->start_y;
	6864	+
	6865	+ // if the width of the specified rectangle is 0, that means
	6866	+ // we may not see any pixels or the image is malformed;
	6867	+ // to make sure this is caught, move the current y down to
	6868	+ // max_y (which is what out_gif_code checks).
	6869	+ if (w == 0)
	6870	+ g->cur_y = g->max_y;
	6871	+
	6872	+ g->lflags = stbi__get8(s);
	6873	+
	6874	+ if (g->lflags & 0x40) {
	6875	+ g->step = 8 * g->line_size; // first interlaced spacing
	6876	+ g->parse = 3;
	6877	+ } else {
	6878	+ g->step = g->line_size;
	6879	+ g->parse = 0;
	6880	+ }
	6881	+
	6882	+ if (g->lflags & 0x80) {
	6883	+ stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
	6884	+ g->color_table = (stbi_uc *) g->lpal;
	6885	+ } else if (g->flags & 0x80) {
	6886	+ g->color_table = (stbi_uc *) g->pal;
	6887	+ } else
	6888	+ return stbi__errpuc("missing color table", "Corrupt GIF");
	6889	+
	6890	+ o = stbi__process_gif_raster(s, g);
	6891	+ if (!o) return NULL;
	6892	+
	6893	+ // if this was the first frame,
	6894	+ pcount = g->w * g->h;
	6895	+ if (first_frame && (g->bgindex > 0)) {
	6896	+ // if first frame, any pixel not drawn to gets the background color
	6897	+ for (pi = 0; pi < pcount; ++pi) {
	6898	+ if (g->history[pi] == 0) {
	6899	+ g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be;
	6900	+ memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 );
	6901	+ }
	6902	+ }
	6903	+ }
	6904	+
	6905	+ return o;
	6906	+ }
	6907	+
	6908	+ case 0x21: // Comment Extension.
	6909	+ {
	6910	+ int len;
	6911	+ int ext = stbi__get8(s);
	6912	+ if (ext == 0xF9) { // Graphic Control Extension.
	6913	+ len = stbi__get8(s);
	6914	+ if (len == 4) {
	6915	+ g->eflags = stbi__get8(s);
	6916	+ g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths.
	6917	+
	6918	+ // unset old transparent
	6919	+ if (g->transparent >= 0) {
	6920	+ g->pal[g->transparent][3] = 255;
	6921	+ }
	6922	+ if (g->eflags & 0x01) {
	6923	+ g->transparent = stbi__get8(s);
	6924	+ if (g->transparent >= 0) {
	6925	+ g->pal[g->transparent][3] = 0;
	6926	+ }
	6927	+ } else {
	6928	+ // don't need transparent
	6929	+ stbi__skip(s, 1);
	6930	+ g->transparent = -1;
	6931	+ }
	6932	+ } else {
	6933	+ stbi__skip(s, len);
	6934	+ break;
	6935	+ }
	6936	+ }
	6937	+ while ((len = stbi__get8(s)) != 0) {
	6938	+ stbi__skip(s, len);
	6939	+ }
	6940	+ break;
	6941	+ }
	6942	+
	6943	+ case 0x3B: // gif stream termination code
	6944	+ return (stbi_uc *) s; // using '1' causes warning on some compilers
	6945	+
	6946	+ default:
	6947	+ return stbi__errpuc("unknown code", "Corrupt GIF");
	6948	+ }
	6949	+ }
	6950	+}
	6951	+
	6952	+static void stbi__load_gif_main_outofmem(stbi__gif g, stbi_uc out, int *delays)
	6953	+{
	6954	+ STBI_FREE(g->out);
	6955	+ STBI_FREE(g->history);
	6956	+ STBI_FREE(g->background);
	6957	+
	6958	+ if (out) STBI_FREE(out);
	6959	+ if (delays && delays) STBI_FREE(delays);
	6960	+ return stbi__errpuc("outofmem", "Out of memory");
	6961	+}
	6962	+
	6963	+static void stbi__load_gif_main(stbi__context s, int *delays, int x, int y, int z, int *comp, int req_comp)
	6964	+{
	6965	+ if (stbi__gif_test(s)) {
	6966	+ int layers = 0;
	6967	+ stbi_uc *u = 0;
	6968	+ stbi_uc *out = 0;
	6969	+ stbi_uc *two_back = 0;
	6970	+ stbi__gif g;
	6971	+ int stride;
	6972	+ int out_size = 0;
	6973	+ int delays_size = 0;
	6974	+
	6975	+ STBI_NOTUSED(out_size);
	6976	+ STBI_NOTUSED(delays_size);
	6977	+
	6978	+ memset(&g, 0, sizeof(g));
	6979	+ if (delays) {
	6980	+ *delays = 0;
	6981	+ }
	6982	+
	6983	+ do {
	6984	+ u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
	6985	+ if (u == (stbi_uc *) s) u = 0; // end of animated gif marker
	6986	+
	6987	+ if (u) {
	6988	+ *x = g.w;
	6989	+ *y = g.h;
	6990	+ ++layers;
	6991	+ stride = g.w * g.h * 4;
	6992	+
	6993	+ if (out) {
	6994	+ void tmp = (stbi_uc) STBI_REALLOC_SIZED( out, out_size, layers * stride );
	6995	+ if (!tmp)
	6996	+ return stbi__load_gif_main_outofmem(&g, out, delays);
	6997	+ else {
	6998	+ out = (stbi_uc*) tmp;
	6999	+ out_size = layers * stride;
	7000	+ }
	7001	+
	7002	+ if (delays) {
	7003	+ int new_delays = (int) STBI_REALLOC_SIZED( delays, delays_size, sizeof(int) layers );
	7004	+ if (!new_delays)
	7005	+ return stbi__load_gif_main_outofmem(&g, out, delays);
	7006	+ *delays = new_delays;
	7007	+ delays_size = layers * sizeof(int);
	7008	+ }
	7009	+ } else {
	7010	+ out = (stbi_uc)stbi__malloc( layers stride );
	7011	+ if (!out)
	7012	+ return stbi__load_gif_main_outofmem(&g, out, delays);
	7013	+ out_size = layers * stride;
	7014	+ if (delays) {
	7015	+ delays = (int) stbi__malloc( layers * sizeof(int) );
	7016	+ if (!*delays)
	7017	+ return stbi__load_gif_main_outofmem(&g, out, delays);
	7018	+ delays_size = layers * sizeof(int);
	7019	+ }
	7020	+ }
	7021	+ memcpy( out + ((layers - 1) * stride), u, stride );
	7022	+ if (layers >= 2) {
	7023	+ two_back = out - 2 * stride;
	7024	+ }
	7025	+
	7026	+ if (delays) {
	7027	+ (*delays)[layers - 1U] = g.delay;
	7028	+ }
	7029	+ }
	7030	+ } while (u != 0);
	7031	+
	7032	+ // free temp buffer;
	7033	+ STBI_FREE(g.out);
	7034	+ STBI_FREE(g.history);
	7035	+ STBI_FREE(g.background);
	7036	+
	7037	+ // do the final conversion after loading everything;
	7038	+ if (req_comp && req_comp != 4)
	7039	+ out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
	7040	+
	7041	+ *z = layers;
	7042	+ return out;
	7043	+ } else {
	7044	+ return stbi__errpuc("not GIF", "Image was not as a gif type.");
	7045	+ }
	7046	+}
	7047	+
	7048	+static void stbi__gif_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	7049	+{
	7050	+ stbi_uc *u = 0;
	7051	+ stbi__gif g;
	7052	+ memset(&g, 0, sizeof(g));
	7053	+ STBI_NOTUSED(ri);
	7054	+
	7055	+ u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
	7056	+ if (u == (stbi_uc *) s) u = 0; // end of animated gif marker
	7057	+ if (u) {
	7058	+ *x = g.w;
	7059	+ *y = g.h;
	7060	+
	7061	+ // moved conversion to after successful load so that the same
	7062	+ // can be done for multiple frames.
	7063	+ if (req_comp && req_comp != 4)
	7064	+ u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
	7065	+ } else if (g.out) {
	7066	+ // if there was an error and we allocated an image buffer, free it!
	7067	+ STBI_FREE(g.out);
	7068	+ }
	7069	+
	7070	+ // free buffers needed for multiple frame loading;
	7071	+ STBI_FREE(g.history);
	7072	+ STBI_FREE(g.background);
	7073	+
	7074	+ return u;
	7075	+}
	7076	+
	7077	+static int stbi__gif_info(stbi__context s, int x, int y, int comp)
	7078	+{
	7079	+ return stbi__gif_info_raw(s,x,y,comp);
	7080	+}
	7081	+#endif
	7082	+
	7083	+// *************************************************************************************************
	7084	+// Radiance RGBE HDR loader
	7085	+// originally by Nicolas Schulz
	7086	+#ifndef STBI_NO_HDR
	7087	+static int stbi__hdr_test_core(stbi__context s, const char signature)
	7088	+{
	7089	+ int i;
	7090	+ for (i=0; signature[i]; ++i)
	7091	+ if (stbi__get8(s) != signature[i])
	7092	+ return 0;
	7093	+ stbi__rewind(s);
	7094	+ return 1;
	7095	+}
	7096	+
	7097	+static int stbi__hdr_test(stbi__context* s)
	7098	+{
	7099	+ int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
	7100	+ stbi__rewind(s);
	7101	+ if(!r) {
	7102	+ r = stbi__hdr_test_core(s, "#?RGBE\n");
	7103	+ stbi__rewind(s);
	7104	+ }
	7105	+ return r;
	7106	+}
	7107	+
	7108	+#define STBI__HDR_BUFLEN 1024
	7109	+static char stbi__hdr_gettoken(stbi__context z, char *buffer)
	7110	+{
	7111	+ int len=0;
	7112	+ char c = '\0';
	7113	+
	7114	+ c = (char) stbi__get8(z);
	7115	+
	7116	+ while (!stbi__at_eof(z) && c != '\n') {
	7117	+ buffer[len++] = c;
	7118	+ if (len == STBI__HDR_BUFLEN-1) {
	7119	+ // flush to end of line
	7120	+ while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
	7121	+ ;
	7122	+ break;
	7123	+ }
	7124	+ c = (char) stbi__get8(z);
	7125	+ }
	7126	+
	7127	+ buffer[len] = 0;
	7128	+ return buffer;
	7129	+}
	7130	+
	7131	+static void stbi__hdr_convert(float output, stbi_uc input, int req_comp)
	7132	+{
	7133	+ if ( input[3] != 0 ) {
	7134	+ float f1;
	7135	+ // Exponent
	7136	+ f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
	7137	+ if (req_comp <= 2)
	7138	+ output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
	7139	+ else {
	7140	+ output[0] = input[0] * f1;
	7141	+ output[1] = input[1] * f1;
	7142	+ output[2] = input[2] * f1;
	7143	+ }
	7144	+ if (req_comp == 2) output[1] = 1;
	7145	+ if (req_comp == 4) output[3] = 1;
	7146	+ } else {
	7147	+ switch (req_comp) {
	7148	+ case 4: output[3] = 1; /* fallthrough */
	7149	+ case 3: output[0] = output[1] = output[2] = 0;
	7150	+ break;
	7151	+ case 2: output[1] = 1; /* fallthrough */
	7152	+ case 1: output[0] = 0;
	7153	+ break;
	7154	+ }
	7155	+ }
	7156	+}
	7157	+
	7158	+static float stbi__hdr_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	7159	+{
	7160	+ char buffer[STBI__HDR_BUFLEN];
	7161	+ char *token;
	7162	+ int valid = 0;
	7163	+ int width, height;
	7164	+ stbi_uc *scanline;
	7165	+ float *hdr_data;
	7166	+ int len;
	7167	+ unsigned char count, value;
	7168	+ int i, j, k, c1,c2, z;
	7169	+ const char *headerToken;
	7170	+ STBI_NOTUSED(ri);
	7171	+
	7172	+ // Check identifier
	7173	+ headerToken = stbi__hdr_gettoken(s,buffer);
	7174	+ if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
	7175	+ return stbi__errpf("not HDR", "Corrupt HDR image");
	7176	+
	7177	+ // Parse header
	7178	+ for(;;) {
	7179	+ token = stbi__hdr_gettoken(s,buffer);
	7180	+ if (token[0] == 0) break;
	7181	+ if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
	7182	+ }
	7183	+
	7184	+ if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format");
	7185	+
	7186	+ // Parse width and height
	7187	+ // can't use sscanf() if we're not using stdio!
	7188	+ token = stbi__hdr_gettoken(s,buffer);
	7189	+ if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format");
	7190	+ token += 3;
	7191	+ height = (int) strtol(token, &token, 10);
	7192	+ while (*token == ' ') ++token;
	7193	+ if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format");
	7194	+ token += 3;
	7195	+ width = (int) strtol(token, NULL, 10);
	7196	+
	7197	+ if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
	7198	+ if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
	7199	+
	7200	+ *x = width;
	7201	+ *y = height;
	7202	+
	7203	+ if (comp) *comp = 3;
	7204	+ if (req_comp == 0) req_comp = 3;
	7205	+
	7206	+ if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
	7207	+ return stbi__errpf("too large", "HDR image is too large");
	7208	+
	7209	+ // Read data
	7210	+ hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
	7211	+ if (!hdr_data)
	7212	+ return stbi__errpf("outofmem", "Out of memory");
	7213	+
	7214	+ // Load image data
	7215	+ // image data is stored as some number of sca
	7216	+ if ( width < 8 \|\| width >= 32768) {
	7217	+ // Read flat data
	7218	+ for (j=0; j < height; ++j) {
	7219	+ for (i=0; i < width; ++i) {
	7220	+ stbi_uc rgbe[4];
	7221	+ main_decode_loop:
	7222	+ stbi__getn(s, rgbe, 4);
	7223	+ stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
	7224	+ }
	7225	+ }
	7226	+ } else {
	7227	+ // Read RLE-encoded data
	7228	+ scanline = NULL;
	7229	+
	7230	+ for (j = 0; j < height; ++j) {
	7231	+ c1 = stbi__get8(s);
	7232	+ c2 = stbi__get8(s);
	7233	+ len = stbi__get8(s);
	7234	+ if (c1 != 2 \|\| c2 != 2 \|\| (len & 0x80)) {
	7235	+ // not run-length encoded, so we have to actually use THIS data as a decoded
	7236	+ // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
	7237	+ stbi_uc rgbe[4];
	7238	+ rgbe[0] = (stbi_uc) c1;
	7239	+ rgbe[1] = (stbi_uc) c2;
	7240	+ rgbe[2] = (stbi_uc) len;
	7241	+ rgbe[3] = (stbi_uc) stbi__get8(s);
	7242	+ stbi__hdr_convert(hdr_data, rgbe, req_comp);
	7243	+ i = 1;
	7244	+ j = 0;
	7245	+ STBI_FREE(scanline);
	7246	+ goto main_decode_loop; // yes, this makes no sense
	7247	+ }
	7248	+ len <<= 8;
	7249	+ len \|= stbi__get8(s);
	7250	+ if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
	7251	+ if (scanline == NULL) {
	7252	+ scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0);
	7253	+ if (!scanline) {
	7254	+ STBI_FREE(hdr_data);
	7255	+ return stbi__errpf("outofmem", "Out of memory");
	7256	+ }
	7257	+ }
	7258	+
	7259	+ for (k = 0; k < 4; ++k) {
	7260	+ int nleft;
	7261	+ i = 0;
	7262	+ while ((nleft = width - i) > 0) {
	7263	+ count = stbi__get8(s);
	7264	+ if (count > 128) {
	7265	+ // Run
	7266	+ value = stbi__get8(s);
	7267	+ count -= 128;
	7268	+ if ((count == 0) \|\| (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
	7269	+ for (z = 0; z < count; ++z)
	7270	+ scanline[i++ * 4 + k] = value;
	7271	+ } else {
	7272	+ // Dump
	7273	+ if ((count == 0) \|\| (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
	7274	+ for (z = 0; z < count; ++z)
	7275	+ scanline[i++ * 4 + k] = stbi__get8(s);
	7276	+ }
	7277	+ }
	7278	+ }
	7279	+ for (i=0; i < width; ++i)
	7280	+ stbi__hdr_convert(hdr_data+(jwidth + i)req_comp, scanline + i*4, req_comp);
	7281	+ }
	7282	+ if (scanline)
	7283	+ STBI_FREE(scanline);
	7284	+ }
	7285	+
	7286	+ return hdr_data;
	7287	+}
	7288	+
	7289	+static int stbi__hdr_info(stbi__context s, int x, int y, int comp)
	7290	+{
	7291	+ char buffer[STBI__HDR_BUFLEN];
	7292	+ char *token;
	7293	+ int valid = 0;
	7294	+ int dummy;
	7295	+
	7296	+ if (!x) x = &dummy;
	7297	+ if (!y) y = &dummy;
	7298	+ if (!comp) comp = &dummy;
	7299	+
	7300	+ if (stbi__hdr_test(s) == 0) {
	7301	+ stbi__rewind( s );
	7302	+ return 0;
	7303	+ }
	7304	+
	7305	+ for(;;) {
	7306	+ token = stbi__hdr_gettoken(s,buffer);
	7307	+ if (token[0] == 0) break;
	7308	+ if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
	7309	+ }
	7310	+
	7311	+ if (!valid) {
	7312	+ stbi__rewind( s );
	7313	+ return 0;
	7314	+ }
	7315	+ token = stbi__hdr_gettoken(s,buffer);
	7316	+ if (strncmp(token, "-Y ", 3)) {
	7317	+ stbi__rewind( s );
	7318	+ return 0;
	7319	+ }
	7320	+ token += 3;
	7321	+ *y = (int) strtol(token, &token, 10);
	7322	+ while (*token == ' ') ++token;
	7323	+ if (strncmp(token, "+X ", 3)) {
	7324	+ stbi__rewind( s );
	7325	+ return 0;
	7326	+ }
	7327	+ token += 3;
	7328	+ *x = (int) strtol(token, NULL, 10);
	7329	+ *comp = 3;
	7330	+ return 1;
	7331	+}
	7332	+#endif // STBI_NO_HDR
	7333	+
	7334	+#ifndef STBI_NO_BMP
	7335	+static int stbi__bmp_info(stbi__context s, int x, int y, int comp)
	7336	+{
	7337	+ void *p;
	7338	+ stbi__bmp_data info;
	7339	+
	7340	+ info.all_a = 255;
	7341	+ p = stbi__bmp_parse_header(s, &info);
	7342	+ if (p == NULL) {
	7343	+ stbi__rewind( s );
	7344	+ return 0;
	7345	+ }
	7346	+ if (x) *x = s->img_x;
	7347	+ if (y) *y = s->img_y;
	7348	+ if (comp) {
	7349	+ if (info.bpp == 24 && info.ma == 0xff000000)
	7350	+ *comp = 3;
	7351	+ else
	7352	+ *comp = info.ma ? 4 : 3;
	7353	+ }
	7354	+ return 1;
	7355	+}
	7356	+#endif
	7357	+
	7358	+#ifndef STBI_NO_PSD
	7359	+static int stbi__psd_info(stbi__context s, int x, int y, int comp)
	7360	+{
	7361	+ int channelCount, dummy, depth;
	7362	+ if (!x) x = &dummy;
	7363	+ if (!y) y = &dummy;
	7364	+ if (!comp) comp = &dummy;
	7365	+ if (stbi__get32be(s) != 0x38425053) {
	7366	+ stbi__rewind( s );
	7367	+ return 0;
	7368	+ }
	7369	+ if (stbi__get16be(s) != 1) {
	7370	+ stbi__rewind( s );
	7371	+ return 0;
	7372	+ }
	7373	+ stbi__skip(s, 6);
	7374	+ channelCount = stbi__get16be(s);
	7375	+ if (channelCount < 0 \|\| channelCount > 16) {
	7376	+ stbi__rewind( s );
	7377	+ return 0;
	7378	+ }
	7379	+ *y = stbi__get32be(s);
	7380	+ *x = stbi__get32be(s);
	7381	+ depth = stbi__get16be(s);
	7382	+ if (depth != 8 && depth != 16) {
	7383	+ stbi__rewind( s );
	7384	+ return 0;
	7385	+ }
	7386	+ if (stbi__get16be(s) != 3) {
	7387	+ stbi__rewind( s );
	7388	+ return 0;
	7389	+ }
	7390	+ *comp = 4;
	7391	+ return 1;
	7392	+}
	7393	+
	7394	+static int stbi__psd_is16(stbi__context *s)
	7395	+{
	7396	+ int channelCount, depth;
	7397	+ if (stbi__get32be(s) != 0x38425053) {
	7398	+ stbi__rewind( s );
	7399	+ return 0;
	7400	+ }
	7401	+ if (stbi__get16be(s) != 1) {
	7402	+ stbi__rewind( s );
	7403	+ return 0;
	7404	+ }
	7405	+ stbi__skip(s, 6);
	7406	+ channelCount = stbi__get16be(s);
	7407	+ if (channelCount < 0 \|\| channelCount > 16) {
	7408	+ stbi__rewind( s );
	7409	+ return 0;
	7410	+ }
	7411	+ STBI_NOTUSED(stbi__get32be(s));
	7412	+ STBI_NOTUSED(stbi__get32be(s));
	7413	+ depth = stbi__get16be(s);
	7414	+ if (depth != 16) {
	7415	+ stbi__rewind( s );
	7416	+ return 0;
	7417	+ }
	7418	+ return 1;
	7419	+}
	7420	+#endif
	7421	+
	7422	+#ifndef STBI_NO_PIC
	7423	+static int stbi__pic_info(stbi__context s, int x, int y, int comp)
	7424	+{
	7425	+ int act_comp=0,num_packets=0,chained,dummy;
	7426	+ stbi__pic_packet packets[10];
	7427	+
	7428	+ if (!x) x = &dummy;
	7429	+ if (!y) y = &dummy;
	7430	+ if (!comp) comp = &dummy;
	7431	+
	7432	+ if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) {
	7433	+ stbi__rewind(s);
	7434	+ return 0;
	7435	+ }
	7436	+
	7437	+ stbi__skip(s, 88);
	7438	+
	7439	+ *x = stbi__get16be(s);
	7440	+ *y = stbi__get16be(s);
	7441	+ if (stbi__at_eof(s)) {
	7442	+ stbi__rewind( s);
	7443	+ return 0;
	7444	+ }
	7445	+ if ( (x) != 0 && (1 << 28) / (x) < (*y)) {
	7446	+ stbi__rewind( s );
	7447	+ return 0;
	7448	+ }
	7449	+
	7450	+ stbi__skip(s, 8);
	7451	+
	7452	+ do {
	7453	+ stbi__pic_packet *packet;
	7454	+
	7455	+ if (num_packets==sizeof(packets)/sizeof(packets[0]))
	7456	+ return 0;
	7457	+
	7458	+ packet = &packets[num_packets++];
	7459	+ chained = stbi__get8(s);
	7460	+ packet->size = stbi__get8(s);
	7461	+ packet->type = stbi__get8(s);
	7462	+ packet->channel = stbi__get8(s);
	7463	+ act_comp \|= packet->channel;
	7464	+
	7465	+ if (stbi__at_eof(s)) {
	7466	+ stbi__rewind( s );
	7467	+ return 0;
	7468	+ }
	7469	+ if (packet->size != 8) {
	7470	+ stbi__rewind( s );
	7471	+ return 0;
	7472	+ }
	7473	+ } while (chained);
	7474	+
	7475	+ *comp = (act_comp & 0x10 ? 4 : 3);
	7476	+
	7477	+ return 1;
	7478	+}
	7479	+#endif
	7480	+
	7481	+// *************************************************************************************************
	7482	+// Portable Gray Map and Portable Pixel Map loader
	7483	+// by Ken Miller
	7484	+//
	7485	+// PGM: http://netpbm.sourceforge.net/doc/pgm.html
	7486	+// PPM: http://netpbm.sourceforge.net/doc/ppm.html
	7487	+//
	7488	+// Known limitations:
	7489	+// Does not support comments in the header section
	7490	+// Does not support ASCII image data (formats P2 and P3)
	7491	+
	7492	+#ifndef STBI_NO_PNM
	7493	+
	7494	+static int stbi__pnm_test(stbi__context *s)
	7495	+{
	7496	+ char p, t;
	7497	+ p = (char) stbi__get8(s);
	7498	+ t = (char) stbi__get8(s);
	7499	+ if (p != 'P' \|\| (t != '5' && t != '6')) {
	7500	+ stbi__rewind( s );
	7501	+ return 0;
	7502	+ }
	7503	+ return 1;
	7504	+}
	7505	+
	7506	+static void stbi__pnm_load(stbi__context s, int x, int y, int comp, int req_comp, stbi__result_info ri)
	7507	+{
	7508	+ stbi_uc *out;
	7509	+ STBI_NOTUSED(ri);
	7510	+
	7511	+ ri->bits_per_channel = stbi__pnm_info(s, (int )&s->img_x, (int )&s->img_y, (int *)&s->img_n);
	7512	+ if (ri->bits_per_channel == 0)
	7513	+ return 0;
	7514	+
	7515	+ if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	7516	+ if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
	7517	+
	7518	+ *x = s->img_x;
	7519	+ *y = s->img_y;
	7520	+ if (comp) *comp = s->img_n;
	7521	+
	7522	+ if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0))
	7523	+ return stbi__errpuc("too large", "PNM too large");
	7524	+
	7525	+ out = (stbi_uc *) stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0);
	7526	+ if (!out) return stbi__errpuc("outofmem", "Out of memory");
	7527	+ if (!stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8))) {
	7528	+ STBI_FREE(out);
	7529	+ return stbi__errpuc("bad PNM", "PNM file truncated");
	7530	+ }
	7531	+
	7532	+ if (req_comp && req_comp != s->img_n) {
	7533	+ if (ri->bits_per_channel == 16) {
	7534	+ out = (stbi_uc ) stbi__convert_format16((stbi__uint16 ) out, s->img_n, req_comp, s->img_x, s->img_y);
	7535	+ } else {
	7536	+ out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
	7537	+ }
	7538	+ if (out == NULL) return out; // stbi__convert_format frees input on failure
	7539	+ }
	7540	+ return out;
	7541	+}
	7542	+
	7543	+static int stbi__pnm_isspace(char c)
	7544	+{
	7545	+ return c == ' ' \|\| c == '\t' \|\| c == '\n' \|\| c == '\v' \|\| c == '\f' \|\| c == '\r';
	7546	+}
	7547	+
	7548	+static void stbi__pnm_skip_whitespace(stbi__context s, char c)
	7549	+{
	7550	+ for (;;) {
	7551	+ while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
	7552	+ *c = (char) stbi__get8(s);
	7553	+
	7554	+ if (stbi__at_eof(s) \|\| *c != '#')
	7555	+ break;
	7556	+
	7557	+ while (!stbi__at_eof(s) && c != '\n' && c != '\r' )
	7558	+ *c = (char) stbi__get8(s);
	7559	+ }
	7560	+}
	7561	+
	7562	+static int stbi__pnm_isdigit(char c)
	7563	+{
	7564	+ return c >= '0' && c <= '9';
	7565	+}
	7566	+
	7567	+static int stbi__pnm_getinteger(stbi__context s, char c)
	7568	+{
	7569	+ int value = 0;
	7570	+
	7571	+ while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
	7572	+ value = value10 + (c - '0');
	7573	+ *c = (char) stbi__get8(s);
	7574	+ if((value > 214748364) \|\| (value == 214748364 && *c > '7'))
	7575	+ return stbi__err("integer parse overflow", "Parsing an integer in the PPM header overflowed a 32-bit int");
	7576	+ }
	7577	+
	7578	+ return value;
	7579	+}
	7580	+
	7581	+static int stbi__pnm_info(stbi__context s, int x, int y, int comp)
	7582	+{
	7583	+ int maxv, dummy;
	7584	+ char c, p, t;
	7585	+
	7586	+ if (!x) x = &dummy;
	7587	+ if (!y) y = &dummy;
	7588	+ if (!comp) comp = &dummy;
	7589	+
	7590	+ stbi__rewind(s);
	7591	+
	7592	+ // Get identifier
	7593	+ p = (char) stbi__get8(s);
	7594	+ t = (char) stbi__get8(s);
	7595	+ if (p != 'P' \|\| (t != '5' && t != '6')) {
	7596	+ stbi__rewind(s);
	7597	+ return 0;
	7598	+ }
	7599	+
	7600	+ *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm
	7601	+
	7602	+ c = (char) stbi__get8(s);
	7603	+ stbi__pnm_skip_whitespace(s, &c);
	7604	+
	7605	+ *x = stbi__pnm_getinteger(s, &c); // read width
	7606	+ if(*x == 0)
	7607	+ return stbi__err("invalid width", "PPM image header had zero or overflowing width");
	7608	+ stbi__pnm_skip_whitespace(s, &c);
	7609	+
	7610	+ *y = stbi__pnm_getinteger(s, &c); // read height
	7611	+ if (*y == 0)
	7612	+ return stbi__err("invalid width", "PPM image header had zero or overflowing width");
	7613	+ stbi__pnm_skip_whitespace(s, &c);
	7614	+
	7615	+ maxv = stbi__pnm_getinteger(s, &c); // read max value
	7616	+ if (maxv > 65535)
	7617	+ return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images");
	7618	+ else if (maxv > 255)
	7619	+ return 16;
	7620	+ else
	7621	+ return 8;
	7622	+}
	7623	+
	7624	+static int stbi__pnm_is16(stbi__context *s)
	7625	+{
	7626	+ if (stbi__pnm_info(s, NULL, NULL, NULL) == 16)
	7627	+ return 1;
	7628	+ return 0;
	7629	+}
	7630	+#endif
	7631	+
	7632	+static int stbi__info_main(stbi__context s, int x, int y, int comp)
	7633	+{
	7634	+ #ifndef STBI_NO_JPEG
	7635	+ if (stbi__jpeg_info(s, x, y, comp)) return 1;
	7636	+ #endif
	7637	+
	7638	+ #ifndef STBI_NO_PNG
	7639	+ if (stbi__png_info(s, x, y, comp)) return 1;
	7640	+ #endif
	7641	+
	7642	+ #ifndef STBI_NO_GIF
	7643	+ if (stbi__gif_info(s, x, y, comp)) return 1;
	7644	+ #endif
	7645	+
	7646	+ #ifndef STBI_NO_BMP
	7647	+ if (stbi__bmp_info(s, x, y, comp)) return 1;
	7648	+ #endif
	7649	+
	7650	+ #ifndef STBI_NO_PSD
	7651	+ if (stbi__psd_info(s, x, y, comp)) return 1;
	7652	+ #endif
	7653	+
	7654	+ #ifndef STBI_NO_PIC
	7655	+ if (stbi__pic_info(s, x, y, comp)) return 1;
	7656	+ #endif
	7657	+
	7658	+ #ifndef STBI_NO_PNM
	7659	+ if (stbi__pnm_info(s, x, y, comp)) return 1;
	7660	+ #endif
	7661	+
	7662	+ #ifndef STBI_NO_HDR
	7663	+ if (stbi__hdr_info(s, x, y, comp)) return 1;
	7664	+ #endif
	7665	+
	7666	+ // test tga last because it's a crappy test!
	7667	+ #ifndef STBI_NO_TGA
	7668	+ if (stbi__tga_info(s, x, y, comp))
	7669	+ return 1;
	7670	+ #endif
	7671	+ return stbi__err("unknown image type", "Image not of any known type, or corrupt");
	7672	+}
	7673	+
	7674	+static int stbi__is_16_main(stbi__context *s)
	7675	+{
	7676	+ #ifndef STBI_NO_PNG
	7677	+ if (stbi__png_is16(s)) return 1;
	7678	+ #endif
	7679	+
	7680	+ #ifndef STBI_NO_PSD
	7681	+ if (stbi__psd_is16(s)) return 1;
	7682	+ #endif
	7683	+
	7684	+ #ifndef STBI_NO_PNM
	7685	+ if (stbi__pnm_is16(s)) return 1;
	7686	+ #endif
	7687	+ return 0;
	7688	+}
	7689	+
	7690	+#ifndef STBI_NO_STDIO
	7691	+STBIDEF int stbi_info(char const filename, int x, int y, int comp)
	7692	+{
	7693	+ FILE *f = stbi__fopen(filename, "rb");
	7694	+ int result;
	7695	+ if (!f) return stbi__err("can't fopen", "Unable to open file");
	7696	+ result = stbi_info_from_file(f, x, y, comp);
	7697	+ fclose(f);
	7698	+ return result;
	7699	+}
	7700	+
	7701	+STBIDEF int stbi_info_from_file(FILE f, int x, int y, int comp)
	7702	+{
	7703	+ int r;
	7704	+ stbi__context s;
	7705	+ long pos = ftell(f);
	7706	+ stbi__start_file(&s, f);
	7707	+ r = stbi__info_main(&s,x,y,comp);
	7708	+ fseek(f,pos,SEEK_SET);
	7709	+ return r;
	7710	+}
	7711	+
	7712	+STBIDEF int stbi_is_16_bit(char const *filename)
	7713	+{
	7714	+ FILE *f = stbi__fopen(filename, "rb");
	7715	+ int result;
	7716	+ if (!f) return stbi__err("can't fopen", "Unable to open file");
	7717	+ result = stbi_is_16_bit_from_file(f);
	7718	+ fclose(f);
	7719	+ return result;
	7720	+}
	7721	+
	7722	+STBIDEF int stbi_is_16_bit_from_file(FILE *f)
	7723	+{
	7724	+ int r;
	7725	+ stbi__context s;
	7726	+ long pos = ftell(f);
	7727	+ stbi__start_file(&s, f);
	7728	+ r = stbi__is_16_main(&s);
	7729	+ fseek(f,pos,SEEK_SET);
	7730	+ return r;
	7731	+}
	7732	+#endif // !STBI_NO_STDIO
	7733	+
	7734	+STBIDEF int stbi_info_from_memory(stbi_uc const buffer, int len, int x, int y, int comp)
	7735	+{
	7736	+ stbi__context s;
	7737	+ stbi__start_mem(&s,buffer,len);
	7738	+ return stbi__info_main(&s,x,y,comp);
	7739	+}
	7740	+
	7741	+STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const c, void user, int x, int y, int *comp)
	7742	+{
	7743	+ stbi__context s;
	7744	+ stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
	7745	+ return stbi__info_main(&s,x,y,comp);
	7746	+}
	7747	+
	7748	+STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
	7749	+{
	7750	+ stbi__context s;
	7751	+ stbi__start_mem(&s,buffer,len);
	7752	+ return stbi__is_16_main(&s);
	7753	+}
	7754	+
	7755	+STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const c, void user)
	7756	+{
	7757	+ stbi__context s;
	7758	+ stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
	7759	+ return stbi__is_16_main(&s);
	7760	+}
	7761	+
	7762	+#endif // STB_IMAGE_IMPLEMENTATION
	7763	+
	7764	+/*
	7765	+ revision history:
	7766	+ 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
	7767	+ 2.19 (2018-02-11) fix warning
	7768	+ 2.18 (2018-01-30) fix warnings
	7769	+ 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
	7770	+ 1-bit BMP
	7771	+ *_is_16_bit api
	7772	+ avoid warnings
	7773	+ 2.16 (2017-07-23) all functions have 16-bit variants;
	7774	+ STBI_NO_STDIO works again;
	7775	+ compilation fixes;
	7776	+ fix rounding in unpremultiply;
	7777	+ optimize vertical flip;
	7778	+ disable raw_len validation;
	7779	+ documentation fixes
	7780	+ 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
	7781	+ warning fixes; disable run-time SSE detection on gcc;
	7782	+ uniform handling of optional "return" values;
	7783	+ thread-safe initialization of zlib tables
	7784	+ 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
	7785	+ 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now
	7786	+ 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
	7787	+ 2.11 (2016-04-02) allocate large structures on the stack
	7788	+ remove white matting for transparent PSD
	7789	+ fix reported channel count for PNG & BMP
	7790	+ re-enable SSE2 in non-gcc 64-bit
	7791	+ support RGB-formatted JPEG
	7792	+ read 16-bit PNGs (only as 8-bit)
	7793	+ 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
	7794	+ 2.09 (2016-01-16) allow comments in PNM files
	7795	+ 16-bit-per-pixel TGA (not bit-per-component)
	7796	+ info() for TGA could break due to .hdr handling
	7797	+ info() for BMP to shares code instead of sloppy parse
	7798	+ can use STBI_REALLOC_SIZED if allocator doesn't support realloc
	7799	+ code cleanup
	7800	+ 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
	7801	+ 2.07 (2015-09-13) fix compiler warnings
	7802	+ partial animated GIF support
	7803	+ limited 16-bpc PSD support
	7804	+ #ifdef unused functions
	7805	+ bug with < 92 byte PIC,PNM,HDR,TGA
	7806	+ 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value
	7807	+ 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning
	7808	+ 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit
	7809	+ 2.03 (2015-04-12) extra corruption checking (mmozeiko)
	7810	+ stbi_set_flip_vertically_on_load (nguillemot)
	7811	+ fix NEON support; fix mingw support
	7812	+ 2.02 (2015-01-19) fix incorrect assert, fix warning
	7813	+ 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2
	7814	+ 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
	7815	+ 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg)
	7816	+ progressive JPEG (stb)
	7817	+ PGM/PPM support (Ken Miller)
	7818	+ STBI_MALLOC,STBI_REALLOC,STBI_FREE
	7819	+ GIF bugfix -- seemingly never worked
	7820	+ STBI_NO_, STBI_ONLY_
	7821	+ 1.48 (2014-12-14) fix incorrectly-named assert()
	7822	+ 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb)
	7823	+ optimize PNG (ryg)
	7824	+ fix bug in interlaced PNG with user-specified channel count (stb)
	7825	+ 1.46 (2014-08-26)
	7826	+ fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG
	7827	+ 1.45 (2014-08-16)
	7828	+ fix MSVC-ARM internal compiler error by wrapping malloc
	7829	+ 1.44 (2014-08-07)
	7830	+ various warning fixes from Ronny Chevalier
	7831	+ 1.43 (2014-07-15)
	7832	+ fix MSVC-only compiler problem in code changed in 1.42
	7833	+ 1.42 (2014-07-09)
	7834	+ don't define _CRT_SECURE_NO_WARNINGS (affects user code)
	7835	+ fixes to stbi__cleanup_jpeg path
	7836	+ added STBI_ASSERT to avoid requiring assert.h
	7837	+ 1.41 (2014-06-25)
	7838	+ fix search&replace from 1.36 that messed up comments/error messages
	7839	+ 1.40 (2014-06-22)
	7840	+ fix gcc struct-initialization warning
	7841	+ 1.39 (2014-06-15)
	7842	+ fix to TGA optimization when req_comp != number of components in TGA;
	7843	+ fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
	7844	+ add support for BMP version 5 (more ignored fields)
	7845	+ 1.38 (2014-06-06)
	7846	+ suppress MSVC warnings on integer casts truncating values
	7847	+ fix accidental rename of 'skip' field of I/O
	7848	+ 1.37 (2014-06-04)
	7849	+ remove duplicate typedef
	7850	+ 1.36 (2014-06-03)
	7851	+ convert to header file single-file library
	7852	+ if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
	7853	+ 1.35 (2014-05-27)
	7854	+ various warnings
	7855	+ fix broken STBI_SIMD path
	7856	+ fix bug where stbi_load_from_file no longer left file pointer in correct place
	7857	+ fix broken non-easy path for 32-bit BMP (possibly never used)
	7858	+ TGA optimization by Arseny Kapoulkine
	7859	+ 1.34 (unknown)
	7860	+ use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
	7861	+ 1.33 (2011-07-14)
	7862	+ make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
	7863	+ 1.32 (2011-07-13)
	7864	+ support for "info" function for all supported filetypes (SpartanJ)
	7865	+ 1.31 (2011-06-20)
	7866	+ a few more leak fixes, bug in PNG handling (SpartanJ)
	7867	+ 1.30 (2011-06-11)
	7868	+ added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
	7869	+ removed deprecated format-specific test/load functions
	7870	+ removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
	7871	+ error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
	7872	+ fix inefficiency in decoding 32-bit BMP (David Woo)
	7873	+ 1.29 (2010-08-16)
	7874	+ various warning fixes from Aurelien Pocheville
	7875	+ 1.28 (2010-08-01)
	7876	+ fix bug in GIF palette transparency (SpartanJ)
	7877	+ 1.27 (2010-08-01)
	7878	+ cast-to-stbi_uc to fix warnings
	7879	+ 1.26 (2010-07-24)
	7880	+ fix bug in file buffering for PNG reported by SpartanJ
	7881	+ 1.25 (2010-07-17)
	7882	+ refix trans_data warning (Won Chun)
	7883	+ 1.24 (2010-07-12)
	7884	+ perf improvements reading from files on platforms with lock-heavy fgetc()
	7885	+ minor perf improvements for jpeg
	7886	+ deprecated type-specific functions so we'll get feedback if they're needed
	7887	+ attempt to fix trans_data warning (Won Chun)
	7888	+ 1.23 fixed bug in iPhone support
	7889	+ 1.22 (2010-07-10)
	7890	+ removed image writing support
	7891	+ stbi_info support from Jetro Lauha
	7892	+ GIF support from Jean-Marc Lienher
	7893	+ iPhone PNG-extensions from James Brown
	7894	+ warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
	7895	+ 1.21 fix use of 'stbi_uc' in header (reported by jon blow)
	7896	+ 1.20 added support for Softimage PIC, by Tom Seddon
	7897	+ 1.19 bug in interlaced PNG corruption check (found by ryg)
	7898	+ 1.18 (2008-08-02)
	7899	+ fix a threading bug (local mutable static)
	7900	+ 1.17 support interlaced PNG
	7901	+ 1.16 major bugfix - stbi__convert_format converted one too many pixels
	7902	+ 1.15 initialize some fields for thread safety
	7903	+ 1.14 fix threadsafe conversion bug
	7904	+ header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
	7905	+ 1.13 threadsafe
	7906	+ 1.12 const qualifiers in the API
	7907	+ 1.11 Support installable IDCT, colorspace conversion routines
	7908	+ 1.10 Fixes for 64-bit (don't use "unsigned long")
	7909	+ optimized upsampling by Fabian "ryg" Giesen
	7910	+ 1.09 Fix format-conversion for PSD code (bad global variables!)
	7911	+ 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz
	7912	+ 1.07 attempt to fix C++ warning/errors again
	7913	+ 1.06 attempt to fix C++ warning/errors again
	7914	+ 1.05 fix TGA loading to return correct *comp and use good luminance calc
	7915	+ 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free
	7916	+ 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR
	7917	+ 1.02 support for (subset of) HDR files, float interface for preferred access to them
	7918	+ 1.01 fix bug: possible bug in handling right-side up bmps... not sure
	7919	+ fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
	7920	+ 1.00 interface to zlib that skips zlib header
	7921	+ 0.99 correct handling of alpha in palette
	7922	+ 0.98 TGA loader by lonesock; dynamically add loaders (untested)
	7923	+ 0.97 jpeg errors on too large a file; also catch another malloc failure
	7924	+ 0.96 fix detection of invalid v value - particleman@mollyrocket forum
	7925	+ 0.95 during header scan, seek to markers in case of padding
	7926	+ 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same
	7927	+ 0.93 handle jpegtran output; verbose errors
	7928	+ 0.92 read 4,8,16,24,32-bit BMP files of several formats
	7929	+ 0.91 output 24-bit Windows 3.0 BMP files
	7930	+ 0.90 fix a few more warnings; bump version number to approach 1.0
	7931	+ 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd
	7932	+ 0.60 fix compiling as c++
	7933	+ 0.59 fix warnings: merge Dave Moore's -Wall fixes
	7934	+ 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian
	7935	+ 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
	7936	+ 0.56 fix bug: zlib uncompressed mode len vs. nlen
	7937	+ 0.55 fix bug: restart_interval not initialized to 0
	7938	+ 0.54 allow NULL for 'int *comp'
	7939	+ 0.53 fix bug in png 3->4; speedup png decoding
	7940	+ 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments
	7941	+ 0.51 obey req_comp requests, 1-component jpegs return as 1-component,
	7942	+ on 'test' only check type, not whether we support this variant
	7943	+ 0.50 (2006-11-19)
	7944	+ first released version
	7945	+*/
	7946	+
	7947	+
	7948	+/*
	7949	+------------------------------------------------------------------------------
	7950	+This software is available under 2 licenses -- choose whichever you prefer.
	7951	+------------------------------------------------------------------------------
	7952	+ALTERNATIVE A - MIT License
	7953	+Copyright (c) 2017 Sean Barrett
	7954	+Permission is hereby granted, free of charge, to any person obtaining a copy of
	7955	+this software and associated documentation files (the "Software"), to deal in
	7956	+the Software without restriction, including without limitation the rights to
	7957	+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
	7958	+of the Software, and to permit persons to whom the Software is furnished to do
	7959	+so, subject to the following conditions:
	7960	+The above copyright notice and this permission notice shall be included in all
	7961	+copies or substantial portions of the Software.
	7962	+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	7963	+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	7964	+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	7965	+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	7966	+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	7967	+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	7968	+SOFTWARE.
	7969	+------------------------------------------------------------------------------
	7970	+ALTERNATIVE B - Public Domain (www.unlicense.org)
	7971	+This is free and unencumbered software released into the public domain.
	7972	+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
	7973	+software, either in source code form or as a compiled binary, for any purpose,
	7974	+commercial or non-commercial, and by any means.
	7975	+In jurisdictions that recognize copyright laws, the author or authors of this
	7976	+software dedicate any and all copyright interest in the software to the public
	7977	+domain. We make this dedication for the benefit of the public at large and to
	7978	+the detriment of our heirs and successors. We intend this dedication to be an
	7979	+overt act of relinquishment in perpetuity of all present and future rights to
	7980	+this software under copyright law.
	7981	+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	7982	+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	7983	+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	7984	+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	7985	+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	7986	+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	7987	+------------------------------------------------------------------------------
	7988	+*/