This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_video.c
3251 lines (2942 loc) · 82.1 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2009 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
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
13
Lesser General Public License for more details.
14
15
16
17
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
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
/* The high-level video driver subsystem */
26
#include "SDL.h"
27
#include "SDL_video.h"
28
29
30
#include "SDL_sysvideo.h"
#include "SDL_blit.h"
#include "SDL_pixels_c.h"
31
#include "SDL_renderer_gl.h"
32
#include "SDL_renderer_gles.h"
33
#include "SDL_renderer_sw.h"
34
35
#include "../events/SDL_sysevents.h"
#include "../events/SDL_events_c.h"
36
37
38
#if SDL_VIDEO_OPENGL_ES
#include "SDL_opengles.h"
39
#endif /* SDL_VIDEO_OPENGL_ES */
40
41
42
43
44
45
46
47
#if SDL_VIDEO_OPENGL
#include "SDL_opengl.h"
/* On Windows, windows.h defines CreateWindow */
#ifdef CreateWindow
#undef CreateWindow
#endif
48
#endif /* SDL_VIDEO_OPENGL */
49
50
/* Available video drivers */
51
static VideoBootStrap *bootstrap[] = {
52
#if SDL_VIDEO_DRIVER_COCOA
53
&COCOA_bootstrap,
54
#endif
55
#if SDL_VIDEO_DRIVER_X11
56
&X11_bootstrap,
57
#endif
58
#if SDL_VIDEO_DRIVER_NANOX
59
&NX_bootstrap,
60
#endif
61
#if SDL_VIDEO_DRIVER_WSCONS
62
&WSCONS_bootstrap,
63
#endif
64
#if SDL_VIDEO_DRIVER_FBCON
65
&FBCON_bootstrap,
66
#endif
67
#if SDL_VIDEO_DRIVER_DIRECTFB
68
&DirectFB_bootstrap,
69
#endif
70
#if SDL_VIDEO_DRIVER_PS2GS
71
&PS2GS_bootstrap,
72
#endif
73
74
75
#if SDL_VIDEO_DRIVER_PS3
&PS3_bootstrap,
#endif
76
#if SDL_VIDEO_DRIVER_VGL
77
&VGL_bootstrap,
78
#endif
79
#if SDL_VIDEO_DRIVER_SVGALIB
80
&SVGALIB_bootstrap,
81
#endif
82
#if SDL_VIDEO_DRIVER_GAPI
83
&GAPI_bootstrap,
84
#endif
85
#if SDL_VIDEO_DRIVER_WIN32
86
&WIN32_bootstrap,
87
#endif
88
#if SDL_VIDEO_DRIVER_BWINDOW
89
&BWINDOW_bootstrap,
90
#endif
91
#if SDL_VIDEO_DRIVER_PHOTON
92
93
94
95
&photon_bootstrap,
#endif
#if SDL_VIDEO_DRIVER_QNXGF
&qnxgf_bootstrap,
96
#endif
97
#if SDL_VIDEO_DRIVER_EPOC
98
&EPOC_bootstrap,
99
#endif
100
#if SDL_VIDEO_DRIVER_XBIOS
101
&XBIOS_bootstrap,
102
#endif
103
#if SDL_VIDEO_DRIVER_GEM
104
&GEM_bootstrap,
105
#endif
106
#if SDL_VIDEO_DRIVER_DC
107
&DC_bootstrap,
108
#endif
109
#if SDL_VIDEO_DRIVER_RISCOS
110
&RISCOS_bootstrap,
111
#endif
112
#if SDL_VIDEO_DRIVER_OS2FS
113
&OS2FSLib_bootstrap,
114
#endif
115
#if SDL_VIDEO_DRIVER_NDS
116
&NDS_bootstrap,
117
#endif
118
#if SDL_VIDEO_DRIVER_UIKIT
119
&UIKIT_bootstrap,
120
#endif
121
#if SDL_VIDEO_DRIVER_DUMMY
122
&DUMMY_bootstrap,
123
124
125
#endif
#if SDL_VIDEO_DRIVER_PANDORA
&PND_bootstrap,
126
#endif
127
NULL
128
};
129
130
static SDL_VideoDevice *_this = NULL;
131
132
/* Various local functions */
133
static void SDL_UpdateWindowGrab(SDL_Window * window);
134
135
136
137
static int
cmpmodes(const void *A, const void *B)
{
138
139
SDL_DisplayMode a = *(const SDL_DisplayMode *) A;
SDL_DisplayMode b = *(const SDL_DisplayMode *) B;
140
141
142
143
144
145
146
147
148
149
if (a.w != b.w) {
return b.w - a.w;
}
if (a.h != b.h) {
return b.h - a.h;
}
if (SDL_BITSPERPIXEL(a.format) != SDL_BITSPERPIXEL(b.format)) {
return SDL_BITSPERPIXEL(b.format) - SDL_BITSPERPIXEL(a.format);
}
150
151
152
if (SDL_PIXELLAYOUT(a.format) != SDL_PIXELLAYOUT(b.format)) {
return SDL_PIXELLAYOUT(b.format) - SDL_PIXELLAYOUT(a.format);
}
153
154
155
156
if (a.refresh_rate != b.refresh_rate) {
return b.refresh_rate - a.refresh_rate;
}
return 0;
157
}
158
159
160
161
static void
SDL_UninitializedVideo()
{
162
SDL_SetError("Video subsystem has not been initialized");
163
164
}
165
166
167
int
SDL_GetNumVideoDrivers(void)
{
168
return SDL_arraysize(bootstrap) - 1;
169
170
}
171
const char *
172
173
SDL_GetVideoDriver(int index)
{
174
175
176
177
if (index >= 0 && index < SDL_GetNumVideoDrivers()) {
return bootstrap[index]->name;
}
return NULL;
178
}
179
180
181
182
/*
* Initialize the video and event subsystems -- determine native pixel format
*/
183
184
int
SDL_VideoInit(const char *driver_name, Uint32 flags)
185
{
186
187
188
SDL_VideoDevice *video;
int index;
int i;
189
190
/* Toggle the event thread flags, based on OS requirements */
191
#if defined(MUST_THREAD_EVENTS)
192
flags |= SDL_INIT_EVENTTHREAD;
193
#elif defined(CANT_THREAD_EVENTS)
194
195
196
197
if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
SDL_SetError("OS doesn't support threaded events");
return -1;
}
198
199
#endif
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
/* Start the event loop */
if (SDL_StartEventLoop(flags) < 0) {
return -1;
}
/* Check to make sure we don't overwrite '_this' */
if (_this != NULL) {
SDL_VideoQuit();
}
/* Select the proper video driver */
index = 0;
video = NULL;
if (driver_name == NULL) {
driver_name = SDL_getenv("SDL_VIDEODRIVER");
}
if (driver_name != NULL) {
for (i = 0; bootstrap[i]; ++i) {
if (SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) {
if (bootstrap[i]->available()) {
video = bootstrap[i]->create(index);
}
break;
}
}
} else {
for (i = 0; bootstrap[i]; ++i) {
if (bootstrap[i]->available()) {
video = bootstrap[i]->create(index);
if (video != NULL) {
break;
}
}
}
}
if (video == NULL) {
if (driver_name) {
SDL_SetError("%s not available", driver_name);
} else {
SDL_SetError("No available video device");
}
return -1;
}
_this = video;
_this->name = bootstrap[i]->name;
_this->next_object_id = 1;
/* Set some very sane GL defaults */
_this->gl_config.driver_loaded = 0;
_this->gl_config.dll_handle = NULL;
_this->gl_config.red_size = 3;
_this->gl_config.green_size = 3;
_this->gl_config.blue_size = 2;
_this->gl_config.alpha_size = 0;
_this->gl_config.buffer_size = 0;
_this->gl_config.depth_size = 16;
_this->gl_config.stencil_size = 0;
_this->gl_config.double_buffer = 1;
_this->gl_config.accum_red_size = 0;
_this->gl_config.accum_green_size = 0;
_this->gl_config.accum_blue_size = 0;
_this->gl_config.accum_alpha_size = 0;
_this->gl_config.stereo = 0;
_this->gl_config.multisamplebuffers = 0;
_this->gl_config.multisamplesamples = 0;
_this->gl_config.retained_backing = 1;
_this->gl_config.accelerated = -1; /* not known, don't set */
266
267
_this->gl_config.major_version = 2;
_this->gl_config.minor_version = 1;
268
269
270
271
272
273
274
275
276
277
278
279
280
281
/* Initialize the video subsystem */
if (_this->VideoInit(_this) < 0) {
SDL_VideoQuit();
return -1;
}
/* Make sure some displays were added */
if (_this->num_displays == 0) {
SDL_SetError("The video driver did not add any displays");
SDL_VideoQuit();
return (-1);
}
/* The software renderer is always available */
for (i = 0; i < _this->num_displays; ++i) {
282
#if SDL_VIDEO_RENDER_OGL
283
SDL_AddRenderDriver(i, &GL_RenderDriver);
284
#endif
285
286
#if SDL_VIDEO_RENDER_OGL_ES
287
SDL_AddRenderDriver(i, &GL_ES_RenderDriver);
288
#endif
289
290
291
292
if (_this->displays[i].num_render_drivers > 0) {
SDL_AddRenderDriver(i, &SW_RenderDriver);
}
}
293
294
295
/* We're ready to go! */
return 0;
296
}
297
298
const char *
299
300
SDL_GetCurrentVideoDriver()
{
301
302
303
304
305
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
return _this->name;
306
}
307
308
309
310
SDL_VideoDevice *
SDL_GetVideoDevice()
{
311
return _this;
312
313
}
314
315
int
SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode)
316
{
317
SDL_VideoDisplay display;
318
319
320
321
322
323
SDL_zero(display);
if (desktop_mode) {
display.desktop_mode = *desktop_mode;
}
display.current_mode = display.desktop_mode;
324
325
return SDL_AddVideoDisplay(&display);
326
327
}
328
329
int
SDL_AddVideoDisplay(const SDL_VideoDisplay * display)
330
{
331
332
SDL_VideoDisplay *displays;
int index = -1;
333
334
335
336
337
338
339
340
341
342
343
344
345
displays =
SDL_realloc(_this->displays,
(_this->num_displays + 1) * sizeof(*displays));
if (displays) {
index = _this->num_displays++;
displays[index] = *display;
displays[index].device = _this;
_this->displays = displays;
} else {
SDL_OutOfMemory();
}
return index;
346
}
347
348
349
350
int
SDL_GetNumVideoDisplays(void)
{
351
352
353
354
355
if (!_this) {
SDL_UninitializedVideo();
return 0;
}
return _this->num_displays;
356
357
}
358
359
int
SDL_SelectVideoDisplay(int index)
360
{
361
362
363
364
365
366
367
368
369
370
371
if (!_this) {
SDL_UninitializedVideo();
return (-1);
}
if (index < 0 || index >= _this->num_displays) {
SDL_SetError("index must be in the range 0 - %d",
_this->num_displays - 1);
return -1;
}
_this->current_display = index;
return 0;
372
373
374
375
376
}
int
SDL_GetCurrentVideoDisplay(void)
{
377
378
379
380
381
if (!_this) {
SDL_UninitializedVideo();
return (-1);
}
return _this->current_display;
382
}
383
384
385
386
SDL_bool
SDL_AddDisplayMode(int displayIndex, const SDL_DisplayMode * mode)
{
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
SDL_VideoDisplay *display = &_this->displays[displayIndex];
SDL_DisplayMode *modes;
int i, nmodes;
/* Make sure we don't already have the mode in the list */
modes = display->display_modes;
nmodes = display->num_display_modes;
for (i = nmodes; i--;) {
if (SDL_memcmp(mode, &modes[i], sizeof(*mode)) == 0) {
return SDL_FALSE;
}
}
/* Go ahead and add the new mode */
if (nmodes == display->max_display_modes) {
modes =
SDL_realloc(modes,
(display->max_display_modes + 32) * sizeof(*modes));
if (!modes) {
return SDL_FALSE;
}
display->display_modes = modes;
display->max_display_modes += 32;
}
modes[nmodes] = *mode;
display->num_display_modes++;
414
415
/* Re-sort video modes */
SDL_qsort(display->display_modes, display->num_display_modes,
416
sizeof(SDL_DisplayMode), cmpmodes);
417
418
return SDL_TRUE;
419
420
}
421
422
int
SDL_GetNumDisplayModes()
423
{
424
425
426
427
428
429
430
431
432
433
if (_this) {
SDL_VideoDisplay *display = &SDL_CurrentDisplay;
if (!display->num_display_modes && _this->GetDisplayModes) {
_this->GetDisplayModes(_this);
SDL_qsort(display->display_modes, display->num_display_modes,
sizeof(SDL_DisplayMode), cmpmodes);
}
return display->num_display_modes;
}
return 0;
434
}
435
436
437
int
SDL_GetDisplayMode(int index, SDL_DisplayMode * mode)
438
{
439
440
441
442
443
444
445
446
447
if (index < 0 || index >= SDL_GetNumDisplayModes()) {
SDL_SetError("index must be in the range of 0 - %d",
SDL_GetNumDisplayModes() - 1);
return -1;
}
if (mode) {
*mode = SDL_CurrentDisplay.display_modes[index];
}
return 0;
448
449
}
450
451
int
SDL_GetDesktopDisplayMode(SDL_DisplayMode * mode)
452
{
453
454
455
456
457
458
459
460
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
if (mode) {
*mode = SDL_CurrentDisplay.desktop_mode;
}
return 0;
461
}
462
463
464
int
SDL_GetCurrentDisplayMode(SDL_DisplayMode * mode)
465
{
466
467
468
469
470
471
472
473
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
if (mode) {
*mode = SDL_CurrentDisplay.current_mode;
}
return 0;
474
}
475
476
477
SDL_DisplayMode *
SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
SDL_DisplayMode * closest)
{
Uint32 target_format;
int target_refresh_rate;
int i;
SDL_DisplayMode *current, *match;
if (!_this || !mode || !closest) {
return NULL;
}
/* Default to the desktop format */
if (mode->format) {
target_format = mode->format;
} else {
target_format = SDL_CurrentDisplay.desktop_mode.format;
}
/* Default to the desktop refresh rate */
if (mode->refresh_rate) {
target_refresh_rate = mode->refresh_rate;
} else {
target_refresh_rate = SDL_CurrentDisplay.desktop_mode.refresh_rate;
}
match = NULL;
for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {
current = &SDL_CurrentDisplay.display_modes[i];
506
if (current->w && (current->w < mode->w)) {
507
508
509
/* Out of sorted modes large enough here */
break;
}
510
511
512
513
514
515
516
517
518
519
if (current->h && (current->h < mode->h)) {
if (current->w && (current->w == mode->w)) {
/* Out of sorted modes large enough here */
break;
}
/* Wider, but not tall enough, due to a different
aspect ratio. This mode must be skipped, but closer
modes may still follow. */
continue;
}
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
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
575
576
577
if (!match || current->w < match->w || current->h < match->h) {
match = current;
continue;
}
if (current->format != match->format) {
/* Sorted highest depth to lowest */
if (current->format == target_format ||
(SDL_BITSPERPIXEL(current->format) >=
SDL_BITSPERPIXEL(target_format)
&& SDL_PIXELTYPE(current->format) ==
SDL_PIXELTYPE(target_format))) {
match = current;
}
continue;
}
if (current->refresh_rate != match->refresh_rate) {
/* Sorted highest refresh to lowest */
if (current->refresh_rate >= target_refresh_rate) {
match = current;
}
}
}
if (match) {
if (match->format) {
closest->format = match->format;
} else {
closest->format = mode->format;
}
if (match->w && match->h) {
closest->w = match->w;
closest->h = match->h;
} else {
closest->w = mode->w;
closest->h = mode->h;
}
if (match->refresh_rate) {
closest->refresh_rate = match->refresh_rate;
} else {
closest->refresh_rate = mode->refresh_rate;
}
closest->driverdata = match->driverdata;
/*
* Pick some reasonable defaults if the app and driver don't
* care
*/
if (!closest->format) {
closest->format = SDL_PIXELFORMAT_RGB888;
}
if (!closest->w) {
closest->w = 640;
}
if (!closest->h) {
closest->h = 480;
}
return closest;
}
return NULL;
578
}
579
580
581
582
int
SDL_SetDisplayMode(const SDL_DisplayMode * mode)
{
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
SDL_VideoDisplay *display;
SDL_DisplayMode display_mode;
SDL_DisplayMode current_mode;
int i, ncolors;
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
display = &SDL_CurrentDisplay;
if (!mode) {
mode = &display->desktop_mode;
}
display_mode = *mode;
/* Default to the current mode */
if (!display_mode.format) {
display_mode.format = display->current_mode.format;
}
if (!display_mode.w) {
display_mode.w = display->current_mode.w;
}
if (!display_mode.h) {
display_mode.h = display->current_mode.h;
}
if (!display_mode.refresh_rate) {
display_mode.refresh_rate = display->current_mode.refresh_rate;
}
/* Get a good video mode, the closest one possible */
if (!SDL_GetClosestDisplayMode(&display_mode, &display_mode)) {
SDL_SetError("No video mode large enough for %dx%d",
display_mode.w, display_mode.h);
return -1;
}
/* See if there's anything left to do */
SDL_GetCurrentDisplayMode(¤t_mode);
if (SDL_memcmp(&display_mode, ¤t_mode, sizeof(display_mode)) == 0) {
return 0;
}
/* Actually change the display mode */
if (_this->SetDisplayMode(_this, &display_mode) < 0) {
return -1;
}
display->current_mode = display_mode;
/* Set up a palette, if necessary */
if (SDL_ISPIXELFORMAT_INDEXED(display_mode.format)) {
ncolors = (1 << SDL_BITSPERPIXEL(display_mode.format));
} else {
ncolors = 0;
}
if ((!ncolors && display->palette) || (ncolors && !display->palette)
|| (ncolors && ncolors != display->palette->ncolors)) {
if (display->palette) {
SDL_FreePalette(display->palette);
display->palette = NULL;
}
if (ncolors) {
display->palette = SDL_AllocPalette(ncolors);
if (!display->palette) {
return -1;
}
SDL_DitherColors(display->palette->colors,
SDL_BITSPERPIXEL(display_mode.format));
}
}
/* Move any fullscreen windows into position */
for (i = 0; i < display->num_windows; ++i) {
SDL_Window *window = &display->windows[i];
if (FULLSCREEN_VISIBLE(window)) {
653
SDL_SetWindowPosition(window->id, window->x, window->y);
654
655
656
657
}
}
return 0;
658
659
}
660
661
662
int
SDL_SetFullscreenDisplayMode(const SDL_DisplayMode * mode)
{
663
664
665
666
667
668
669
670
671
672
673
674
SDL_VideoDisplay *display;
SDL_DisplayMode fullscreen_mode;
int i;
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
display = &SDL_CurrentDisplay;
if (!mode) {
mode = &display->desktop_mode;
}
675
676
677
678
if (!SDL_GetClosestDisplayMode(mode, &fullscreen_mode)) {
SDL_SetError("Couldn't find display mode match");
return -1;
}
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
if (SDL_memcmp
(&fullscreen_mode, &display->fullscreen_mode,
sizeof(fullscreen_mode)) == 0) {
/* Nothing to do... */
return 0;
}
display->fullscreen_mode = fullscreen_mode;
/* Actually set the mode if we have a fullscreen window visible */
for (i = 0; i < display->num_windows; ++i) {
SDL_Window *window = &display->windows[i];
if (FULLSCREEN_VISIBLE(window)) {
if (SDL_SetDisplayMode(&display->fullscreen_mode) < 0) {
return -1;
}
}
if (window->flags & SDL_WINDOW_FULLSCREEN) {
SDL_OnWindowResized(window);
}
}
return 0;
701
702
}
703
704
int
SDL_GetFullscreenDisplayMode(SDL_DisplayMode * mode)
705
{
706
707
708
709
710
711
712
713
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
if (mode) {
*mode = SDL_CurrentDisplay.fullscreen_mode;
}
return 0;
714
}
715
716
717
718
int
SDL_SetDisplayPalette(const SDL_Color * colors, int firstcolor, int ncolors)
{
719
720
SDL_Palette *palette;
int status = 0;
721
722
723
724
725
726
727
728
729
730
731
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
palette = SDL_CurrentDisplay.palette;
if (!palette) {
SDL_SetError("Display mode does not have a palette");
return -1;
}
status = SDL_SetPaletteColors(palette, colors, firstcolor, ncolors);
732
733
734
735
736
737
738
if (_this->SetDisplayPalette) {
if (_this->SetDisplayPalette(_this, palette) < 0) {
status = -1;
}
}
return status;
739
}
740
741
742
743
int
SDL_GetDisplayPalette(SDL_Color * colors, int firstcolor, int ncolors)
{
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
SDL_Palette *palette;
if (!_this) {
SDL_UninitializedVideo();
return -1;
}
palette = SDL_CurrentDisplay.palette;
if (!palette->ncolors) {
SDL_SetError("Display mode does not have a palette");
return -1;
}
if (firstcolor < 0 || (firstcolor + ncolors) > palette->ncolors) {
SDL_SetError("Palette indices are out of range");
return -1;
}
SDL_memcpy(colors, &palette->colors[firstcolor],
ncolors * sizeof(*colors));
return 0;
762
}
763
764
765
766
SDL_WindowID
SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
{
767
768
769
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
770
771
SDL_WINDOW_RESIZABLE |
SDL_WINDOW_INPUT_GRABBED);
772
773
774
775
776
777
778
779
780
SDL_VideoDisplay *display;
SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
SDL_UninitializedVideo();
return 0;
}
781
782
783
784
785
786
if (flags & SDL_WINDOW_OPENGL) {
if (!_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");
return 0;
}
SDL_GL_LoadLibrary(NULL);
787
788
789
790
791
792
793
794
795
796
797
}
SDL_zero(window);
window.id = _this->next_object_id++;
window.x = x;
window.y = y;
window.w = w;
window.h = h;
window.flags = (flags & allowed_flags);
window.display = _this->current_display;
if (_this->CreateWindow && _this->CreateWindow(_this, &window) < 0) {
798
799
800
if (flags & SDL_WINDOW_OPENGL) {
SDL_GL_UnloadLibrary();
}
801
802
803
804
805
806
807
808
809
810
return 0;
}
display = &SDL_CurrentDisplay;
num_windows = display->num_windows;
windows =
SDL_realloc(display->windows, (num_windows + 1) * sizeof(*windows));
if (!windows) {
if (_this->DestroyWindow) {
_this->DestroyWindow(_this, &window);
}
811
812
813
if (flags & SDL_WINDOW_OPENGL) {
SDL_GL_UnloadLibrary();
}
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
return 0;
}
windows[num_windows] = window;
display->windows = windows;
display->num_windows++;
if (title) {
SDL_SetWindowTitle(window.id, title);
}
if (flags & SDL_WINDOW_MAXIMIZED) {
SDL_MaximizeWindow(window.id);
}
if (flags & SDL_WINDOW_MINIMIZED) {
SDL_MinimizeWindow(window.id);
}
if (flags & SDL_WINDOW_SHOWN) {
SDL_ShowWindow(window.id);
}
832
833
SDL_UpdateWindowGrab(&window);
834
return window.id;
835
836
}
837
838
839
SDL_WindowID
SDL_CreateWindowFrom(const void *data)
{
840
841
842
843
844
845
846
847
848
849
850
851
SDL_VideoDisplay *display;
SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
SDL_UninitializedVideo();
return (0);
}
SDL_zero(window);
window.id = _this->next_object_id++;
window.display = _this->current_display;
852
window.flags = SDL_WINDOW_FOREIGN;
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
if (!_this->CreateWindowFrom ||
_this->CreateWindowFrom(_this, &window, data) < 0) {
return 0;
}
display = &SDL_CurrentDisplay;
num_windows = display->num_windows;
windows =
SDL_realloc(display->windows, (num_windows + 1) * sizeof(*windows));
if (!windows) {
if (_this->DestroyWindow) {
_this->DestroyWindow(_this, &window);
}
if (window.title) {
SDL_free(window.title);
}
return 0;
}
windows[num_windows] = window;
display->windows = windows;
display->num_windows++;
return window.id;
876
877
}
878
int
879
SDL_RecreateWindow(SDL_Window * window, Uint32 flags)
880
{
881
882
883
884
885
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
SDL_WINDOW_RESIZABLE |
SDL_WINDOW_INPUT_GRABBED);
886
887
888
889
890
891
char *title = window->title;
if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");
return -1;
}
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
if ((window->flags & SDL_WINDOW_OPENGL) != (flags & SDL_WINDOW_OPENGL)) {
if (flags & SDL_WINDOW_OPENGL) {
SDL_GL_LoadLibrary(NULL);
} else {
SDL_GL_UnloadLibrary();
}
}
if (window->flags & SDL_WINDOW_FOREIGN) {
/* Can't destroy and re-create foreign windows, hrm */
flags |= SDL_WINDOW_FOREIGN;
} else {
flags &= ~SDL_WINDOW_FOREIGN;
}
if (_this->DestroyWindow && !(flags & SDL_WINDOW_FOREIGN)) {
908
909
_this->DestroyWindow(_this, window);
}
910
911
window->title = NULL;
912
window->flags = (flags & allowed_flags);
913
914
915
916
917
918
919
920
if (_this->CreateWindow && !(flags & SDL_WINDOW_FOREIGN)) {
if (_this->CreateWindow(_this, window) < 0) {
if (flags & SDL_WINDOW_OPENGL) {
SDL_GL_UnloadLibrary();
}
return -1;
}
921
}
922
923
924
925
926
927
928
929
930
931
932
933
934
935
if (title) {
SDL_SetWindowTitle(window->id, title);
SDL_free(title);
}
if (flags & SDL_WINDOW_MAXIMIZED) {
SDL_MaximizeWindow(window->id);
}
if (flags & SDL_WINDOW_MINIMIZED) {
SDL_MinimizeWindow(window->id);
}
if (flags & SDL_WINDOW_SHOWN) {
SDL_ShowWindow(window->id);
}
936
937
SDL_UpdateWindowGrab(window);
938
939
940
941
return 0;
}
SDL_Window *
942
943
SDL_GetWindowFromID(SDL_WindowID windowID)
{
944
int i, j;
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
for (i = 0; i < _this->num_displays; ++i) {
SDL_VideoDisplay *display = &_this->displays[i];
for (j = 0; j < display->num_windows; ++j) {
SDL_Window *window = &display->windows[j];
if (window->id == windowID) {
return window;
}
}
}
return NULL;
960
961
}
962
963
964
SDL_VideoDisplay *
SDL_GetDisplayFromWindow(SDL_Window * window)
{
965
966
967
968
969
970
971
972
if (!_this) {
SDL_UninitializedVideo();
return NULL;
}
if (!window) {
return NULL;
}
return &_this->displays[window->display];
973
974
}
975
976
977
Uint32
SDL_GetWindowFlags(SDL_WindowID windowID)
{
978
SDL_Window *window = SDL_GetWindowFromID(windowID);
979
980
981
982
983
if (!window) {
return 0;
}
return window->flags;
984
985
}
986
987
988
void
SDL_SetWindowTitle(SDL_WindowID windowID, const char *title)
{
989
SDL_Window *window = SDL_GetWindowFromID(windowID);
990
991
992
993
994
995
996
997
998
999
1000
if (!window || title == window->title) {
return;
}
if (window->title) {
SDL_free(window->title);
}
if (title) {
window->title = SDL_strdup(title);
} else {
window->title = NULL;