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cpputils / deps / glfw / src / x11_monitor.c
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1//========================================================================
2// GLFW 3.3 X11 - www.glfw.org
3//------------------------------------------------------------------------
4// Copyright (c) 2002-2006 Marcus Geelnard
5// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
6//
7// This software is provided 'as-is', without any express or implied
8// warranty. In no event will the authors be held liable for any damages
9// arising from the use of this software.
10//
11// Permission is granted to anyone to use this software for any purpose,
12// including commercial applications, and to alter it and redistribute it
13// freely, subject to the following restrictions:
14//
15// 1. The origin of this software must not be misrepresented; you must not
16// claim that you wrote the original software. If you use this software
17// in a product, an acknowledgment in the product documentation would
18// be appreciated but is not required.
19//
20// 2. Altered source versions must be plainly marked as such, and must not
21// be misrepresented as being the original software.
22//
23// 3. This notice may not be removed or altered from any source
24// distribution.
25//
26//========================================================================
27// It is fine to use C99 in this file because it will not be built with VS
28//========================================================================
29
30#include "internal.h"
31
32#include <limits.h>
33#include <stdlib.h>
34#include <string.h>
35#include <math.h>
36
37
38// Check whether the display mode should be included in enumeration
39//
40static GLFWbool modeIsGood(const XRRModeInfo* mi)
41{
42 return (mi->modeFlags & RR_Interlace) == 0;
43}
44
45// Calculates the refresh rate, in Hz, from the specified RandR mode info
46//
47static int calculateRefreshRate(const XRRModeInfo* mi)
48{
49 if (mi->hTotal && mi->vTotal)
50 return (int) round((double) mi->dotClock / ((double) mi->hTotal * (double) mi->vTotal));
51 else
52 return 0;
53}
54
55// Returns the mode info for a RandR mode XID
56//
57static const XRRModeInfo* getModeInfo(const XRRScreenResources* sr, RRMode id)
58{
59 for (int i = 0; i < sr->nmode; i++)
60 {
61 if (sr->modes[i].id == id)
62 return sr->modes + i;
63 }
64
65 return NULL;
66}
67
68// Convert RandR mode info to GLFW video mode
69//
70static GLFWvidmode vidmodeFromModeInfo(const XRRModeInfo* mi,
71 const XRRCrtcInfo* ci)
72{
73 GLFWvidmode mode;
74
75 if (ci->rotation == RR_Rotate_90 || ci->rotation == RR_Rotate_270)
76 {
77 mode.width = mi->height;
78 mode.height = mi->width;
79 }
80 else
81 {
82 mode.width = mi->width;
83 mode.height = mi->height;
84 }
85
86 mode.refreshRate = calculateRefreshRate(mi);
87
88 _glfwSplitBPP(DefaultDepth(_glfw.x11.display, _glfw.x11.screen),
89 &mode.redBits, &mode.greenBits, &mode.blueBits);
90
91 return mode;
92}
93
94
95//////////////////////////////////////////////////////////////////////////
96////// GLFW internal API //////
97//////////////////////////////////////////////////////////////////////////
98
99// Poll for changes in the set of connected monitors
100//
101void _glfwPollMonitorsX11(void)
102{
103 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
104 {
105 int disconnectedCount, screenCount = 0;
106 _GLFWmonitor** disconnected = NULL;
107 XineramaScreenInfo* screens = NULL;
108 XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display,
109 _glfw.x11.root);
110 RROutput primary = XRRGetOutputPrimary(_glfw.x11.display,
111 _glfw.x11.root);
112
113 if (_glfw.x11.xinerama.available)
114 screens = XineramaQueryScreens(_glfw.x11.display, &screenCount);
115
116 disconnectedCount = _glfw.monitorCount;
117 if (disconnectedCount)
118 {
119 disconnected = calloc(_glfw.monitorCount, sizeof(_GLFWmonitor*));
120 memcpy(disconnected,
121 _glfw.monitors,
122 _glfw.monitorCount * sizeof(_GLFWmonitor*));
123 }
124
125 for (int i = 0; i < sr->noutput; i++)
126 {
127 int j, type, widthMM, heightMM;
128
129 XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, sr->outputs[i]);
130 if (oi->connection != RR_Connected || oi->crtc == None)
131 {
132 XRRFreeOutputInfo(oi);
133 continue;
134 }
135
136 for (j = 0; j < disconnectedCount; j++)
137 {
138 if (disconnected[j] &&
139 disconnected[j]->x11.output == sr->outputs[i])
140 {
141 disconnected[j] = NULL;
142 break;
143 }
144 }
145
146 if (j < disconnectedCount)
147 {
148 XRRFreeOutputInfo(oi);
149 continue;
150 }
151
152 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, oi->crtc);
153 if (ci->rotation == RR_Rotate_90 || ci->rotation == RR_Rotate_270)
154 {
155 widthMM = oi->mm_height;
156 heightMM = oi->mm_width;
157 }
158 else
159 {
160 widthMM = oi->mm_width;
161 heightMM = oi->mm_height;
162 }
163
164 if (widthMM <= 0 || heightMM <= 0)
165 {
166 // HACK: If RandR does not provide a physical size, assume the
167 // X11 default 96 DPI and calcuate from the CRTC viewport
168 // NOTE: These members are affected by rotation, unlike the mode
169 // info and output info members
170 widthMM = (int) (ci->width * 25.4f / 96.f);
171 heightMM = (int) (ci->height * 25.4f / 96.f);
172 }
173
174 _GLFWmonitor* monitor = _glfwAllocMonitor(oi->name, widthMM, heightMM);
175 monitor->x11.output = sr->outputs[i];
176 monitor->x11.crtc = oi->crtc;
177
178 for (j = 0; j < screenCount; j++)
179 {
180 if (screens[j].x_org == ci->x &&
181 screens[j].y_org == ci->y &&
182 screens[j].width == ci->width &&
183 screens[j].height == ci->height)
184 {
185 monitor->x11.index = j;
186 break;
187 }
188 }
189
190 if (monitor->x11.output == primary)
191 type = _GLFW_INSERT_FIRST;
192 else
193 type = _GLFW_INSERT_LAST;
194
195 _glfwInputMonitor(monitor, GLFW_CONNECTED, type);
196
197 XRRFreeOutputInfo(oi);
198 XRRFreeCrtcInfo(ci);
199 }
200
201 XRRFreeScreenResources(sr);
202
203 if (screens)
204 XFree(screens);
205
206 for (int i = 0; i < disconnectedCount; i++)
207 {
208 if (disconnected[i])
209 _glfwInputMonitor(disconnected[i], GLFW_DISCONNECTED, 0);
210 }
211
212 free(disconnected);
213 }
214 else
215 {
216 const int widthMM = DisplayWidthMM(_glfw.x11.display, _glfw.x11.screen);
217 const int heightMM = DisplayHeightMM(_glfw.x11.display, _glfw.x11.screen);
218
219 _glfwInputMonitor(_glfwAllocMonitor("Display", widthMM, heightMM),
220 GLFW_CONNECTED,
221 _GLFW_INSERT_FIRST);
222 }
223}
224
225// Set the current video mode for the specified monitor
226//
227void _glfwSetVideoModeX11(_GLFWmonitor* monitor, const GLFWvidmode* desired)
228{
229 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
230 {
231 GLFWvidmode current;
232 RRMode native = None;
233
234 const GLFWvidmode* best = _glfwChooseVideoMode(monitor, desired);
235 _glfwPlatformGetVideoMode(monitor, &current);
236 if (_glfwCompareVideoModes(&current, best) == 0)
237 return;
238
239 XRRScreenResources* sr =
240 XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
241 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
242 XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
243
244 for (int i = 0; i < oi->nmode; i++)
245 {
246 const XRRModeInfo* mi = getModeInfo(sr, oi->modes[i]);
247 if (!modeIsGood(mi))
248 continue;
249
250 const GLFWvidmode mode = vidmodeFromModeInfo(mi, ci);
251 if (_glfwCompareVideoModes(best, &mode) == 0)
252 {
253 native = mi->id;
254 break;
255 }
256 }
257
258 if (native)
259 {
260 if (monitor->x11.oldMode == None)
261 monitor->x11.oldMode = ci->mode;
262
263 XRRSetCrtcConfig(_glfw.x11.display,
264 sr, monitor->x11.crtc,
265 CurrentTime,
266 ci->x, ci->y,
267 native,
268 ci->rotation,
269 ci->outputs,
270 ci->noutput);
271 }
272
273 XRRFreeOutputInfo(oi);
274 XRRFreeCrtcInfo(ci);
275 XRRFreeScreenResources(sr);
276 }
277}
278
279// Restore the saved (original) video mode for the specified monitor
280//
281void _glfwRestoreVideoModeX11(_GLFWmonitor* monitor)
282{
283 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
284 {
285 if (monitor->x11.oldMode == None)
286 return;
287
288 XRRScreenResources* sr =
289 XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
290 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
291
292 XRRSetCrtcConfig(_glfw.x11.display,
293 sr, monitor->x11.crtc,
294 CurrentTime,
295 ci->x, ci->y,
296 monitor->x11.oldMode,
297 ci->rotation,
298 ci->outputs,
299 ci->noutput);
300
301 XRRFreeCrtcInfo(ci);
302 XRRFreeScreenResources(sr);
303
304 monitor->x11.oldMode = None;
305 }
306}
307
308
309//////////////////////////////////////////////////////////////////////////
310////// GLFW platform API //////
311//////////////////////////////////////////////////////////////////////////
312
313void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor)
314{
315}
316
317void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
318{
319 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
320 {
321 XRRScreenResources* sr =
322 XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
323 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
324
325 if (ci)
326 {
327 if (xpos)
328 *xpos = ci->x;
329 if (ypos)
330 *ypos = ci->y;
331
332 XRRFreeCrtcInfo(ci);
333 }
334
335 XRRFreeScreenResources(sr);
336 }
337}
338
339void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
340 float* xscale, float* yscale)
341{
342 if (xscale)
343 *xscale = _glfw.x11.contentScaleX;
344 if (yscale)
345 *yscale = _glfw.x11.contentScaleY;
346}
347
348void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int* width, int* height)
349{
350 int areaX = 0, areaY = 0, areaWidth = 0, areaHeight = 0;
351
352 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
353 {
354 XRRScreenResources* sr =
355 XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
356 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
357
358 areaX = ci->x;
359 areaY = ci->y;
360
361 const XRRModeInfo* mi = getModeInfo(sr, ci->mode);
362
363 if (ci->rotation == RR_Rotate_90 || ci->rotation == RR_Rotate_270)
364 {
365 areaWidth = mi->height;
366 areaHeight = mi->width;
367 }
368 else
369 {
370 areaWidth = mi->width;
371 areaHeight = mi->height;
372 }
373
374 XRRFreeCrtcInfo(ci);
375 XRRFreeScreenResources(sr);
376 }
377 else
378 {
379 areaWidth = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
380 areaHeight = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
381 }
382
383 if (_glfw.x11.NET_WORKAREA && _glfw.x11.NET_CURRENT_DESKTOP)
384 {
385 Atom* extents = NULL;
386 Atom* desktop = NULL;
387 const unsigned long extentCount =
388 _glfwGetWindowPropertyX11(_glfw.x11.root,
389 _glfw.x11.NET_WORKAREA,
390 XA_CARDINAL,
391 (unsigned char**) &extents);
392
393 if (_glfwGetWindowPropertyX11(_glfw.x11.root,
394 _glfw.x11.NET_CURRENT_DESKTOP,
395 XA_CARDINAL,
396 (unsigned char**) &desktop) > 0)
397 {
398 if (extentCount >= 4 && *desktop < extentCount / 4)
399 {
400 const int globalX = extents[*desktop * 4 + 0];
401 const int globalY = extents[*desktop * 4 + 1];
402 const int globalWidth = extents[*desktop * 4 + 2];
403 const int globalHeight = extents[*desktop * 4 + 3];
404
405 if (areaX < globalX)
406 {
407 areaWidth -= globalX - areaX;
408 areaX = globalX;
409 }
410
411 if (areaY < globalY)
412 {
413 areaHeight -= globalY - areaY;
414 areaY = globalY;
415 }
416
417 if (areaX + areaWidth > globalX + globalWidth)
418 areaWidth = globalX - areaX + globalWidth;
419 if (areaY + areaHeight > globalY + globalHeight)
420 areaHeight = globalY - areaY + globalHeight;
421 }
422 }
423
424 if (extents)
425 XFree(extents);
426 if (desktop)
427 XFree(desktop);
428 }
429
430 if (xpos)
431 *xpos = areaX;
432 if (ypos)
433 *ypos = areaY;
434 if (width)
435 *width = areaWidth;
436 if (height)
437 *height = areaHeight;
438}
439
440GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
441{
442 GLFWvidmode* result;
443
444 *count = 0;
445
446 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
447 {
448 XRRScreenResources* sr =
449 XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
450 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
451 XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
452
453 result = calloc(oi->nmode, sizeof(GLFWvidmode));
454
455 for (int i = 0; i < oi->nmode; i++)
456 {
457 const XRRModeInfo* mi = getModeInfo(sr, oi->modes[i]);
458 if (!modeIsGood(mi))
459 continue;
460
461 const GLFWvidmode mode = vidmodeFromModeInfo(mi, ci);
462 int j;
463
464 for (j = 0; j < *count; j++)
465 {
466 if (_glfwCompareVideoModes(result + j, &mode) == 0)
467 break;
468 }
469
470 // Skip duplicate modes
471 if (j < *count)
472 continue;
473
474 (*count)++;
475 result[*count - 1] = mode;
476 }
477
478 XRRFreeOutputInfo(oi);
479 XRRFreeCrtcInfo(ci);
480 XRRFreeScreenResources(sr);
481 }
482 else
483 {
484 *count = 1;
485 result = calloc(1, sizeof(GLFWvidmode));
486 _glfwPlatformGetVideoMode(monitor, result);
487 }
488
489 return result;
490}
491
492void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
493{
494 if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
495 {
496 XRRScreenResources* sr =
497 XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
498 XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
499
500 if (ci)
501 {
502 const XRRModeInfo* mi = getModeInfo(sr, ci->mode);
503 if (mi) // mi can be NULL if the monitor has been disconnected
504 *mode = vidmodeFromModeInfo(mi, ci);
505
506 XRRFreeCrtcInfo(ci);
507 }
508
509 XRRFreeScreenResources(sr);
510 }
511 else
512 {
513 mode->width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
514 mode->height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
515 mode->refreshRate = 0;
516
517 _glfwSplitBPP(DefaultDepth(_glfw.x11.display, _glfw.x11.screen),
518 &mode->redBits, &mode->greenBits, &mode->blueBits);
519 }
520}
521
522GLFWbool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
523{
524 if (_glfw.x11.randr.available && !_glfw.x11.randr.gammaBroken)
525 {
526 const size_t size = XRRGetCrtcGammaSize(_glfw.x11.display,
527 monitor->x11.crtc);
528 XRRCrtcGamma* gamma = XRRGetCrtcGamma(_glfw.x11.display,
529 monitor->x11.crtc);
530
531 _glfwAllocGammaArrays(ramp, size);
532
533 memcpy(ramp->red, gamma->red, size * sizeof(unsigned short));
534 memcpy(ramp->green, gamma->green, size * sizeof(unsigned short));
535 memcpy(ramp->blue, gamma->blue, size * sizeof(unsigned short));
536
537 XRRFreeGamma(gamma);
538 return GLFW_TRUE;
539 }
540 else if (_glfw.x11.vidmode.available)
541 {
542 int size;
543 XF86VidModeGetGammaRampSize(_glfw.x11.display, _glfw.x11.screen, &size);
544
545 _glfwAllocGammaArrays(ramp, size);
546
547 XF86VidModeGetGammaRamp(_glfw.x11.display,
548 _glfw.x11.screen,
549 ramp->size, ramp->red, ramp->green, ramp->blue);
550 return GLFW_TRUE;
551 }
552 else
553 {
554 _glfwInputError(GLFW_PLATFORM_ERROR,
555 "X11: Gamma ramp access not supported by server");
556 return GLFW_FALSE;
557 }
558}
559
560void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
561{
562 if (_glfw.x11.randr.available && !_glfw.x11.randr.gammaBroken)
563 {
564 if (XRRGetCrtcGammaSize(_glfw.x11.display, monitor->x11.crtc) != ramp->size)
565 {
566 _glfwInputError(GLFW_PLATFORM_ERROR,
567 "X11: Gamma ramp size must match current ramp size");
568 return;
569 }
570
571 XRRCrtcGamma* gamma = XRRAllocGamma(ramp->size);
572
573 memcpy(gamma->red, ramp->red, ramp->size * sizeof(unsigned short));
574 memcpy(gamma->green, ramp->green, ramp->size * sizeof(unsigned short));
575 memcpy(gamma->blue, ramp->blue, ramp->size * sizeof(unsigned short));
576
577 XRRSetCrtcGamma(_glfw.x11.display, monitor->x11.crtc, gamma);
578 XRRFreeGamma(gamma);
579 }
580 else if (_glfw.x11.vidmode.available)
581 {
582 XF86VidModeSetGammaRamp(_glfw.x11.display,
583 _glfw.x11.screen,
584 ramp->size,
585 (unsigned short*) ramp->red,
586 (unsigned short*) ramp->green,
587 (unsigned short*) ramp->blue);
588 }
589 else
590 {
591 _glfwInputError(GLFW_PLATFORM_ERROR,
592 "X11: Gamma ramp access not supported by server");
593 }
594}
595
596
597//////////////////////////////////////////////////////////////////////////
598////// GLFW native API //////
599//////////////////////////////////////////////////////////////////////////
600
601GLFWAPI RRCrtc glfwGetX11Adapter(GLFWmonitor* handle)
602{
603 _GLFWmonitor* monitor = (_GLFWmonitor*) handle;
604 _GLFW_REQUIRE_INIT_OR_RETURN(None);
605 return monitor->x11.crtc;
606}
607
608GLFWAPI RROutput glfwGetX11Monitor(GLFWmonitor* handle)
609{
610 _GLFWmonitor* monitor = (_GLFWmonitor*) handle;
611 _GLFW_REQUIRE_INIT_OR_RETURN(None);
612 return monitor->x11.output;
613}
614