This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_x11modes.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2009 Sam Lantinga
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_x11video.h"
26
27
28
29
//#define X11MODES_DEBUG
#undef SDL_VIDEO_DRIVER_X11_XINERAMA
#undef SDL_VIDEO_DRIVER_X11_XRANDR
#undef SDL_VIDEO_DRIVER_X11_VIDMODE
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
static int
get_visualinfo(Display * display, int screen, XVisualInfo * vinfo)
{
const char *visual_id = SDL_getenv("SDL_VIDEO_X11_VISUALID");
int use_directcolor = 1;
int depth;
/* Look for an exact visual, if requested */
if (visual_id) {
XVisualInfo *vi, template;
int nvis;
SDL_zero(template);
template.visualid = SDL_strtol(visual_id, NULL, 0);
vi = XGetVisualInfo(display, VisualIDMask, &template, &nvis);
if (vi) {
*vinfo = *vi;
XFree(vi);
return 0;
}
}
depth = DefaultDepth(display, screen);
if ((use_directcolor &&
XMatchVisualInfo(display, screen, depth, DirectColor, vinfo)) ||
XMatchVisualInfo(display, screen, depth, TrueColor, vinfo) ||
XMatchVisualInfo(display, screen, depth, PseudoColor, vinfo) ||
XMatchVisualInfo(display, screen, depth, StaticColor, vinfo)) {
return 0;
}
return -1;
}
65
X11_GetPixelFormatFromVisualInfo(Display * display, XVisualInfo * vinfo)
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
{
if (vinfo->class == DirectColor || vinfo->class == TrueColor) {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
Rmask = vinfo->visual->red_mask;
Gmask = vinfo->visual->green_mask;
Bmask = vinfo->visual->blue_mask;
if (vinfo->depth == 32) {
Amask = (0xFFFFFFFF & ~(Rmask | Gmask | Bmask));
} else {
Amask = 0;
}
bpp = vinfo->depth;
if (bpp == 24) {
int i, n;
XPixmapFormatValues *p = XListPixmapFormats(display, &n);
if (p) {
for (i = 0; i < n; ++i) {
if (p[i].depth == 24) {
bpp = p[i].bits_per_pixel;
break;
}
}
XFree(p);
}
}
return SDL_MasksToPixelFormatEnum(bpp, Rmask, Gmask, Bmask, Amask);
}
if (vinfo->class == PseudoColor || vinfo->class == StaticColor) {
switch (vinfo->depth) {
case 8:
return SDL_PIXELTYPE_INDEX8;
case 4:
if (BitmapBitOrder(display) == LSBFirst) {
return SDL_PIXELFORMAT_INDEX4LSB;
} else {
return SDL_PIXELFORMAT_INDEX4MSB;
}
break;
case 1:
if (BitmapBitOrder(display) == LSBFirst) {
return SDL_PIXELFORMAT_INDEX1LSB;
} else {
return SDL_PIXELFORMAT_INDEX1MSB;
}
break;
}
}
return SDL_PIXELFORMAT_UNKNOWN;
}
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
void
X11_InitModes(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
int screen;
for (screen = 0; screen < ScreenCount(data->display); ++screen) {
XVisualInfo vinfo;
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
if (get_visualinfo(data->display, screen, &vinfo) < 0) {
continue;
}
138
mode.format = X11_GetPixelFormatFromVisualInfo(data->display, &vinfo);
139
140
141
142
143
144
145
146
147
148
149
mode.w = DisplayWidth(data->display, screen);
mode.h = DisplayHeight(data->display, screen);
mode.refresh_rate = 0;
mode.driverdata = NULL;
displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
if (!displaydata) {
continue;
}
displaydata->screen = screen;
displaydata->visual = vinfo.visual;
150
displaydata->depth = vinfo.depth;
151
152
153
154
155
156
157
158
159
SDL_zero(display);
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = displaydata;
SDL_AddVideoDisplay(&display);
}
}
160
161
162
163
164
/* Global for the error handler */
int vm_event, vm_error = -1;
#if SDL_VIDEO_DRIVER_X11_XINERAMA
static SDL_bool
165
CheckXinerama(Display * display, int *major, int *minor)
166
167
168
169
170
171
172
173
174
175
176
177
178
{
const char *env;
/* Default the extension not available */
*major = *minor = 0;
/* Allow environment override */
env = getenv("SDL_VIDEO_X11_XINERAMA");
if (env && !SDL_atoi(env)) {
return SDL_FALSE;
}
/* Query the extension version */
179
180
if (!SDL_NAME(XineramaQueryExtension) (display, major, minor) ||
!SDL_NAME(XineramaIsActive) (display)) {
181
182
183
184
185
186
187
188
return SDL_FALSE;
}
return SDL_TRUE;
}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */
#if SDL_VIDEO_DRIVER_X11_XRANDR
static SDL_bool
189
CheckXRandR(Display * display, int *major, int *minor)
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
{
const char *env;
/* Default the extension not available */
*major = *minor = 0;
/* Allow environment override */
env = getenv("SDL_VIDEO_X11_XRANDR");
if (env && !SDL_atoi(env)) {
return SDL_FALSE;
}
if (!SDL_X11_HAVE_XRANDR) {
return SDL_FALSE;
}
/* Query the extension version */
if (!XRRQueryVersion(display, major, minor)) {
return SDL_FALSE;
}
return SDL_TRUE;
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_VIDMODE
static SDL_bool
216
CheckVidMode(Display * display, int *major, int *minor)
217
218
219
220
221
222
223
224
225
226
227
{
const char *env;
/* Default the extension not available */
*major = *minor = 0;
/* Allow environment override */
env = getenv("SDL_VIDEO_X11_VIDMODE");
if (env && !SDL_atoi(env)) {
return SDL_FALSE;
}
228
229
230
/* Query the extension version */
vm_error = -1;
231
232
if (!SDL_NAME(XF86VidModeQueryExtension) (display, &vm_event, &vm_error)
|| !SDL_NAME(XF86VidModeQueryVersion) (display, major, minor)) {
233
234
235
236
237
return SDL_FALSE;
}
return SDL_TRUE;
}
238
239
Bool SDL_NAME(XF86VidModeGetModeInfo) (Display * dpy, int scr,
SDL_NAME(XF86VidModeModeInfo) * info)
240
241
242
243
244
245
{
Bool retval;
int dotclock;
SDL_NAME(XF86VidModeModeLine) l;
SDL_zerop(info);
SDL_zero(l);
246
retval = SDL_NAME(XF86VidModeGetModeLine) (dpy, scr, &dotclock, &l);
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
info->dotclock = dotclock;
info->hdisplay = l.hdisplay;
info->hsyncstart = l.hsyncstart;
info->hsyncend = l.hsyncend;
info->htotal = l.htotal;
info->hskew = l.hskew;
info->vdisplay = l.vdisplay;
info->vsyncstart = l.vsyncstart;
info->vsyncend = l.vsyncend;
info->vtotal = l.vtotal;
info->flags = l.flags;
info->privsize = l.privsize;
info->private = l.private;
return retval;
}
static int
264
calculate_rate(SDL_NAME(XF86VidModeModeInfo) * info)
266
267
268
return (info->htotal
&& info->vtotal) ? (1000 * info->dotclock / (info->htotal *
info->vtotal)) : 0;
269
270
271
}
static void
272
save_mode(Display * display, SDL_DisplayData * data)
274
275
276
277
278
SDL_NAME(XF86VidModeGetModeInfo) (display, data->screen,
&data->saved_mode);
SDL_NAME(XF86VidModeGetViewPort) (display, data->screen,
&data->saved_view.x,
&data->saved_view.y);
279
280
281
}
static void
282
restore_mode(Display * display, SDL_DisplayData * data)
283
284
285
{
SDL_NAME(XF86VidModeModeInfo) mode;
286
if (SDL_NAME(XF86VidModeGetModeInfo) (display, data->screen, &mode)) {
287
if (SDL_memcmp(&mode, &data->saved_mode, sizeof(mode)) != 0) {
288
289
SDL_NAME(XF86VidModeSwitchToMode) (display, data->screen,
&data->saved_mode);
290
291
292
}
}
if ((data->saved_view.x != 0) || (data->saved_view.y != 0)) {
293
294
295
SDL_NAME(XF86VidModeSetViewPort) (display, data->screen,
data->saved_view.x,
data->saved_view.y);
296
297
298
299
}
}
#endif /* SDL_VIDEO_DRIVER_X11_VIDMODE */
300
301
302
void
X11_GetDisplayModes(_THIS)
{
303
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
304
SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
305
306
307
#if SDL_VIDEO_DRIVER_X11_XINERAMA
int xinerama_major, xinerama_minor;
int screens;
308
SDL_NAME(XineramaScreenInfo) * xinerama;
309
310
311
312
313
314
315
316
317
318
#endif
#if SDL_VIDEO_DRIVER_X11_XRANDR
int xrandr_major, xrandr_minor;
int nsizes, nrates;
XRRScreenSize *sizes;
short *rates;
#endif
#if SDL_VIDEO_DRIVER_X11_VIDMODE
int vm_major, vm_minor;
int nmodes;
319
SDL_NAME(XF86VidModeModeInfo) ** modes;
320
321
322
#endif
int screen_w;
int screen_h;
323
SDL_DisplayMode mode;
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
/* Unfortunately X11 requires the window to be created with the correct
* visual and depth ahead of time, but the SDL API allows you to create
* a window before setting the fullscreen display mode. This means that
* we have to use the same format for all windows and all display modes.
* (or support recreating the window with a new visual behind the scenes)
*/
mode.format = SDL_CurrentDisplay.current_mode.format;
mode.driverdata = NULL;
data->use_xinerama = 0;
data->use_xrandr = 0;
data->use_vidmode = 0;
screen_w = DisplayWidth(display, data->screen);
screen_h = DisplayHeight(display, data->screen);
#if SDL_VIDEO_DRIVER_X11_XINERAMA
/* Query Xinerama extention */
if (CheckXinerama(display, &xinerama_major, &xinerama_minor)) {
#ifdef X11MODES_DEBUG
printf("X11 detected Xinerama:\n");
#endif
346
xinerama = SDL_NAME(XineramaQueryScreens) (display, &screens);
347
348
349
350
351
if (xinerama) {
int i;
for (i = 0; i < screens; i++) {
#ifdef X11MODES_DEBUG
printf("xinerama %d: %dx%d+%d+%d\n",
352
353
354
xinerama[i].screen_number,
xinerama[i].width, xinerama[i].height,
xinerama[i].x_org, xinerama[i].y_org);
355
356
#endif
if (xinerama[i].screen_number == data->screen) {
357
358
data->use_xinerama =
xinerama_major * 100 + xinerama_minor;
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
data->xinerama_info = xinerama[i];
}
}
XFree(xinerama);
}
if (data->use_xinerama) {
/* Add the full xinerama mode */
if (screen_w > data->xinerama_info.width ||
screen_h > data->xinerama_info.height) {
mode.w = screen_w;
mode.h = screen_h;
mode.refresh_rate = 0;
SDL_AddDisplayMode(_this->current_display, &mode);
}
/* Add the head xinerama mode */
mode.w = data->xinerama_info.width;
mode.h = data->xinerama_info.height;
mode.refresh_rate = 0;
SDL_AddDisplayMode(_this->current_display, &mode);
}
}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */
#if SDL_VIDEO_DRIVER_X11_XRANDR
/* XRandR */
/* require at least XRandR v1.0 (arbitrary) */
387
388
if (CheckXRandR(display, &xrandr_major, &xrandr_minor)
&& xrandr_major >= 1) {
389
390
391
392
393
394
395
#ifdef X11MODES_DEBUG
fprintf(stderr, "XRANDR: XRRQueryVersion: V%d.%d\n",
xrandr_major, xrandr_minor);
#endif
/* save the screen configuration since we must reference it
each time we toggle modes.
396
397
398
*/
data->screen_config =
XRRGetScreenInfo(display, RootWindow(display, data->screen));
399
400
401
402
403
/* retrieve the list of resolution */
sizes = XRRConfigSizes(data->screen_config, &nsizes);
if (nsizes > 0) {
int i, j;
404
for (i = 0; i < nsizes; i++) {
405
406
407
408
409
410
411
mode.w = sizes[i].width;
mode.h = sizes[i].height;
rates = XRRConfigRates(data->screen_config, i, &nrates);
for (j = 0; j < nrates; ++j) {
mode.refresh_rate = rates[j];
#ifdef X11MODES_DEBUG
412
413
fprintf(stderr,
"XRANDR: mode = %4d[%d], w = %4d, h = %4d, rate = %4d\n",
414
415
416
417
418
419
420
i, j, mode.w, mode.h, mode.refresh_rate);
#endif
SDL_AddDisplayMode(_this->current_display, &mode);
}
}
data->use_xrandr = xrandr_major * 100 + xrandr_minor;
421
422
423
data->saved_size =
XRRConfigCurrentConfiguration(data->screen_config,
&data->saved_rotation);
424
425
426
427
428
429
430
431
432
433
434
435
data->saved_rate = XRRConfigCurrentRate(data->screen_config);
}
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_VIDMODE
/* XVidMode */
if (!data->use_xrandr &&
#if SDL_VIDEO_DRIVER_X11_XINERAMA
(!data->use_xinerama || data->xinerama_info.screen_number == 0) &&
#endif
CheckVidMode(display, &vm_major, &vm_minor) &&
436
437
SDL_NAME(XF86VidModeGetAllModeLines) (display, data->screen, &nmodes,
&modes)) {
438
439
440
441
442
443
int i;
#ifdef X11MODES_DEBUG
printf("VidMode modes: (unsorted)\n");
for (i = 0; i < nmodes; ++i) {
printf("Mode %d: %d x %d @ %d\n", i,
444
445
modes[i]->hdisplay, modes[i]->vdisplay,
calculate_rate(modes[i]));
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
}
#endif
for (i = 0; i < nmodes; ++i) {
mode.w = modes[i]->hdisplay;
mode.h = modes[i]->vdisplay;
mode.refresh_rate = calculate_rate(modes[i]);
SDL_AddDisplayMode(_this->current_display, &mode);
}
XFree(modes);
data->use_vidmode = vm_major * 100 + vm_minor;
save_mode(display, data);
}
#endif /* SDL_VIDEO_DRIVER_X11_VIDMODE */
if (!data->use_xrandr && !data->use_vidmode) {
mode.w = screen_w;
mode.h = screen_h;
mode.refresh_rate = 0;
SDL_AddDisplayMode(_this->current_display, &mode);
466
}
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
#ifdef X11MODES_DEBUG
if (data->use_xinerama) {
printf("Xinerama is enabled\n");
}
if (data->use_xrandr) {
printf("XRandR is enabled\n");
}
if (data->use_vidmode) {
printf("VidMode is enabled\n");
}
#endif /* X11MODES_DEBUG */
}
static void
483
484
get_real_resolution(Display * display, SDL_DisplayData * data, int *w, int *h,
int *rate)
485
486
487
488
489
{
#if SDL_VIDEO_DRIVER_X11_XRANDR
if (data->use_xrandr) {
int nsizes;
XRRScreenSize *sizes;
490
491
492
493
494
495
sizes = XRRConfigSizes(data->screen_config, &nsizes);
if (nsizes > 0) {
int cur_size;
Rotation cur_rotation;
496
497
498
cur_size =
XRRConfigCurrentConfiguration(data->screen_config,
&cur_rotation);
499
500
501
502
*w = sizes[cur_size].width;
*h = sizes[cur_size].height;
*rate = XRRConfigCurrentRate(data->screen_config);
#ifdef X11MODES_DEBUG
503
504
505
fprintf(stderr,
"XRANDR: get_real_resolution: w = %d, h = %d, rate = %d\n",
*w, *h, *rate);
506
507
508
509
510
511
512
513
514
515
#endif
return;
}
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_VIDMODE
if (data->use_vidmode) {
SDL_NAME(XF86VidModeModeInfo) mode;
516
if (SDL_NAME(XF86VidModeGetModeInfo) (display, data->screen, &mode)) {
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
*w = mode.hdisplay;
*h = mode.vdisplay;
*rate = calculate_rate(&mode);
return;
}
}
#endif /* SDL_VIDEO_DRIVER_X11_VIDMODE */
#if SDL_VIDEO_DRIVER_X11_XINERAMA
if (data->use_xinerama) {
*w = data->xinerama_info.width;
*h = data->xinerama_info.height;
*rate = 0;
return;
}
#endif /* SDL_VIDEO_DRIVER_X11_XINERAMA */
*w = DisplayWidth(display, data->screen);
*h = DisplayHeight(display, data->screen);
*rate = 0;
}
static void
540
541
set_best_resolution(Display * display, SDL_DisplayData * data, int w, int h,
int rate)
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
{
int real_w, real_h, real_rate;
/* check current mode so we can avoid uneccessary mode changes */
get_real_resolution(display, data, &real_w, &real_h, &real_rate);
if (w == real_w && h == real_h && (!rate || rate == real_rate)) {
return;
}
#if SDL_VIDEO_DRIVER_X11_XRANDR
if (data->use_xrandr) {
#ifdef X11MODES_DEBUG
fprintf(stderr, "XRANDR: set_best_resolution(): w = %d, h = %d\n",
w, h);
#endif
int i, nsizes, nrates;
int best;
int best_rate;
XRRScreenSize *sizes;
short *rates;
/* find the smallest resolution that is at least as big as the user requested */
best = -1;
sizes = XRRConfigSizes(data->screen_config, &nsizes);
for (i = 0; i < nsizes; ++i) {
if (sizes[i].width < w || sizes[i].height < h) {
continue;
}
if (sizes[i].width == w && sizes[i].height == h) {
best = i;
break;
}
if (best == -1 ||
(sizes[i].width < sizes[best].width) ||
575
576
(sizes[i].width == sizes[best].width
&& sizes[i].height < sizes[best].height)) {
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
best = i;
}
}
if (best >= 0) {
best_rate = 0;
rates = XRRConfigRates(data->screen_config, best, &nrates);
for (i = 0; i < nrates; ++i) {
if (rates[i] == rate) {
best_rate = rate;
break;
}
if (!rate) {
/* Higher is better, right? */
if (rates[i] > best_rate) {
best_rate = rates[i];
}
} else {
595
if (SDL_abs(rates[i] - rate) < SDL_abs(best_rate - rate)) {
596
597
598
599
best_rate = rates[i];
}
}
}
600
601
602
603
XRRSetScreenConfigAndRate(display, data->screen_config,
RootWindow(display, data->screen), best,
data->saved_rotation, best_rate,
CurrentTime);
604
605
606
607
608
609
610
}
return;
}
#endif /* SDL_VIDEO_DRIVER_X11_XRANDR */
#if SDL_VIDEO_DRIVER_X11_VIDMODE
if (data->use_vidmode) {
611
SDL_NAME(XF86VidModeModeInfo) ** modes;
612
613
614
int i, nmodes;
int best;
615
616
if (SDL_NAME(XF86VidModeGetAllModeLines)
(display, data->screen, &nmodes, &modes)) {
617
618
619
620
621
622
623
best = -1;
for (i = 0; i < nmodes; ++i) {
if (modes[i]->hdisplay < w || modes[i]->vdisplay < h) {
continue;
}
if (best == -1 ||
(modes[i]->hdisplay < modes[best]->hdisplay) ||
624
625
(modes[i]->hdisplay == modes[best]->hdisplay
&& modes[i]->vdisplay < modes[best]->vdisplay)) {
626
627
628
629
630
631
632
best = i;
continue;
}
if ((modes[i]->hdisplay == modes[best]->hdisplay) &&
(modes[i]->vdisplay == modes[best]->vdisplay)) {
if (!rate) {
/* Higher is better, right? */
633
634
if (calculate_rate(modes[i]) >
calculate_rate(modes[best])) {
635
636
637
best = i;
}
} else {
638
639
if (SDL_abs(calculate_rate(modes[i]) - rate) <
SDL_abs(calculate_rate(modes[best]) - rate)) {
640
641
642
643
644
645
646
647
best = i;
}
}
}
}
if (best >= 0) {
#ifdef X11MODES_DEBUG
printf("Best Mode %d: %d x %d @ %d\n", best,
648
649
modes[best]->hdisplay, modes[best]->vdisplay,
calculate_rate(modes[best]));
651
652
SDL_NAME(XF86VidModeSwitchToMode) (display, data->screen,
modes[best]);
653
654
655
656
657
658
}
XFree(modes);
}
return;
}
#endif /* SDL_VIDEO_DRIVER_X11_VIDMODE */
659
660
661
662
663
}
int
X11_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
{
664
665
666
667
668
Display *display = ((SDL_VideoData *) _this->driverdata)->display;
SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
set_best_resolution(display, data, mode->w, mode->h, mode->refresh_rate);
return 0;
669
670
671
672
673
674
675
676
}
void
X11_QuitModes(_THIS)
{
}
/* vi: set ts=4 sw=4 expandtab: */