Gitler

suwako / VulkanExample

インデックスバッファー

テクニカル諏訪子 <suwako@076.moe>、2026-07-22 10:49
コミット 4848c56757038a8d253546ec222235bf36dee92a ・親 0ce43e8 ・ファイルを見る

2個のファイル、+44 -14

変更 VulkanExample/main.cc

		@@ -43,6 +43,8 @@
43	43
44	44	vk::Buffer vertBuf = nullptr;
45	45	vk::DeviceMemory vertBufMem = nullptr;
	46	+vk::Buffer idxBuf = nullptr;
	47	+vk::DeviceMemory idxBufMem = nullptr;
46	48
47	49	#pragma region debugCallback
48	50	static VKAPI_ATTR vk::Bool32 VKAPI_CALL debugCallback(
		@@ -254,12 +256,13 @@
254	256	cmdBuf.beginRendering(renderingInfo);
255	257	cmdBuf.bindPipeline(vk::PipelineBindPoint::eGraphics, gfxPipeline);
256	258	cmdBuf.bindVertexBuffers(0, vertBuf, {0});
	259	+ cmdBuf.bindIndexBuffer(idxBuf, 0, vk::IndexType::eUint16);
257	260	cmdBuf.setViewport(0, vk::Viewport(0.f, 0.f,
258	261	static_cast<float>(swapChainExtent.width),
259	262	static_cast<float>(swapChainExtent.height),
260	263	0.f, 1.f));
261	264	cmdBuf.setScissor(0, vk::Rect2D(vk::Offset2D(0, 0), swapChainExtent));
262		- cmdBuf.draw(static_cast<uint32_t>(vertices.size()), 1, 0, 0);
	265	+ cmdBuf.drawIndexed(static_cast<uint32_t>(indices.size()), 1, 0, 0, 0);
263	266	cmdBuf.endRendering();
264	267
265	268	transitionImgLayout(imgIdx,
		@@ -646,18 +649,39 @@
646	649	#pragma endregion
647	650
648	651	#pragma region vertexBuffer
649		- vk::DeviceSize bufSize = sizeof(vertices[0]) * vertices.size();
650		- vk::MemoryPropertyFlags flags = vk::MemoryPropertyFlagBits::eHostVisible \| vk::MemoryPropertyFlagBits::eHostCoherent;
651		- auto [stagingBuf, stagingBufMem] = createBuffer(bufSize, vk::BufferUsageFlagBits::eTransferSrc, flags);
	652	+ {
	653	+ vk::DeviceSize bufSize = sizeof(vertices[0]) * vertices.size();
	654	+ vk::MemoryPropertyFlags flags = vk::MemoryPropertyFlagBits::eHostVisible \| vk::MemoryPropertyFlagBits::eHostCoherent;
	655	+ auto [stagingBuf, stagingBufMem] = createBuffer(bufSize, vk::BufferUsageFlagBits::eTransferSrc, flags);
652	656
653		- void *dataStaging = device.mapMemory(stagingBufMem, 0, bufSize);
654		- memcpy(dataStaging, vertices.data(), bufSize);
655		- device.unmapMemory(stagingBufMem);
	657	+ void *dataStaging = device.mapMemory(stagingBufMem, 0, bufSize);
	658	+ memcpy(dataStaging, vertices.data(), bufSize);
	659	+ device.unmapMemory(stagingBufMem);
656	660
657		- std::tie(vertBuf, vertBufMem) = createBuffer(bufSize, vk::BufferUsageFlagBits::eVertexBuffer \| vk::BufferUsageFlagBits::eTransferDst, vk::MemoryPropertyFlagBits::eDeviceLocal);
658		- copyBuffer(stagingBuf, vertBuf, bufSize);
	661	+ std::tie(vertBuf, vertBufMem) = createBuffer(bufSize, vk::BufferUsageFlagBits::eVertexBuffer \| vk::BufferUsageFlagBits::eTransferDst, vk::MemoryPropertyFlagBits::eDeviceLocal);
	662	+ copyBuffer(stagingBuf, vertBuf, bufSize);
	663	+ if (stagingBuf) device.destroyBuffer(stagingBuf);
	664	+ if (stagingBufMem) device.freeMemory(stagingBufMem);
	665	+ }
659	666	#pragma endregion
660	667
	668	+#pragma region indexBuffer
	669	+ {
	670	+ vk::DeviceSize bufSize = sizeof(indices[0]) * indices.size();
	671	+ vk::MemoryPropertyFlags flags = vk::MemoryPropertyFlagBits::eHostVisible \| vk::MemoryPropertyFlagBits::eHostCoherent;
	672	+ auto [stagingBuf, stagingBufMem] = createBuffer(bufSize, vk::BufferUsageFlagBits::eTransferSrc, flags);
	673	+
	674	+ void *dataStaging = device.mapMemory(stagingBufMem, 0, bufSize);
	675	+ memcpy(dataStaging, indices.data(), (size_t)bufSize);
	676	+ device.unmapMemory(stagingBufMem);
	677	+
	678	+ std::tie(idxBuf, idxBufMem) = createBuffer(bufSize, vk::BufferUsageFlagBits::eIndexBuffer \| vk::BufferUsageFlagBits::eTransferDst, vk::MemoryPropertyFlagBits::eDeviceLocal);
	679	+ copyBuffer(stagingBuf, idxBuf, bufSize);
	680	+ if (stagingBuf) device.destroyBuffer(stagingBuf);
	681	+ if (stagingBufMem) device.freeMemory(stagingBufMem);
	682	+ }
	683	+#pragma endregion
	684	+
661	685	#pragma region commandbuffers
662	686	vk::CommandBufferAllocateInfo allocInfo = {};
663	687	allocInfo.commandPool = cmdPool;
		@@ -761,8 +785,8 @@
761	785	#pragma region destroy
762	786	if (device) device.waitIdle();
763	787	if (cmdPool) device.destroyCommandPool(cmdPool);
764		- if (stagingBuf) device.destroyBuffer(stagingBuf);
765		- if (stagingBufMem) device.freeMemory(stagingBufMem);
	788	+ if (idxBuf) device.destroyBuffer(idxBuf);
	789	+ if (idxBufMem) device.freeMemory(idxBufMem);
766	790	if (vertBuf) device.destroyBuffer(vertBuf);
767	791	if (vertBufMem) device.freeMemory(vertBufMem);
768	792	if (gfxPipeline) device.destroyPipeline(gfxPipeline);

変更 VulkanExample/util/root.hh

		@@ -61,7 +61,13 @@
61	61	};
62	62
63	63	inline const std::vector<Vertex> vertices = {
64		- {{ 0.0f, -0.5f }, { 1.f, 0.f, 0.f }},
65		- {{ 0.5f, 0.5f }, { 0.f, 1.f, 0.f }},
66		- {{ -0.5f, 0.5f }, { 0.f, 0.f, 1.f }},
	64	+ {{ -0.5f, -0.5f }, { 1.f, 0.f, 0.f }},
	65	+ {{ 0.5f, -0.5f }, { 0.f, 1.f, 0.f }},
	66	+ {{ 0.5f, 0.5f }, { 0.f, 0.f, 1.f }},
	67	+ {{ -0.5f, 0.5f }, { 1.f, 1.f, 0.f }},
	68	+};
	69	+
	70	+inline const std::vector<uint16_t> indices = {
	71	+ 0, 1, 2,
	72	+ 2, 3, 0,
67	73	};