This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_video.c
2719 lines (2377 loc) · 65.1 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 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
26
27
28
29
/* The high-level video driver subsystem */
#include "SDL.h"
#include "SDL_sysvideo.h"
#include "SDL_blit.h"
#include "SDL_pixels_c.h"
30
#include "SDL_renderer_gl.h"
31
#include "SDL_renderer_sw.h"
32
33
#include "../events/SDL_sysevents.h"
#include "../events/SDL_events_c.h"
34
35
36
37
38
39
40
41
42
43
#if SDL_VIDEO_OPENGL
#include "SDL_opengl.h"
/* On Windows, windows.h defines CreateWindow */
#ifdef CreateWindow
#undef CreateWindow
#endif
#endif /* SDL_VIDEO_OPENGL */
44
45
/* Available video drivers */
static VideoBootStrap *bootstrap[] = {
46
47
#if SDL_VIDEO_DRIVER_COCOA
&COCOA_bootstrap,
48
#endif
49
#if SDL_VIDEO_DRIVER_X11
50
&X11_bootstrap,
51
#endif
52
#if SDL_VIDEO_DRIVER_NANOX
53
&NX_bootstrap,
54
#endif
55
#if SDL_VIDEO_DRIVER_IPOD
56
&iPod_bootstrap,
57
#endif
58
#if SDL_VIDEO_DRIVER_WSCONS
59
&WSCONS_bootstrap,
60
#endif
61
#if SDL_VIDEO_DRIVER_FBCON
62
&FBCON_bootstrap,
63
#endif
64
#if SDL_VIDEO_DRIVER_DIRECTFB
65
&DirectFB_bootstrap,
66
#endif
67
#if SDL_VIDEO_DRIVER_PS2GS
68
&PS2GS_bootstrap,
69
#endif
70
#if SDL_VIDEO_DRIVER_VGL
71
&VGL_bootstrap,
72
#endif
73
#if SDL_VIDEO_DRIVER_SVGALIB
74
&SVGALIB_bootstrap,
75
#endif
76
#if SDL_VIDEO_DRIVER_GAPI
77
&GAPI_bootstrap,
78
#endif
79
80
#if SDL_VIDEO_DRIVER_WIN32
&WIN32_bootstrap,
81
#endif
82
#if SDL_VIDEO_DRIVER_BWINDOW
83
&BWINDOW_bootstrap,
84
#endif
85
#if SDL_VIDEO_DRIVER_CYBERGRAPHICS
86
&CGX_bootstrap,
87
#endif
88
#if SDL_VIDEO_DRIVER_PHOTON
89
&ph_bootstrap,
90
#endif
91
#if SDL_VIDEO_DRIVER_EPOC
92
&EPOC_bootstrap,
93
#endif
94
#if SDL_VIDEO_DRIVER_XBIOS
95
&XBIOS_bootstrap,
96
#endif
97
#if SDL_VIDEO_DRIVER_GEM
98
&GEM_bootstrap,
99
#endif
100
#if SDL_VIDEO_DRIVER_DC
101
&DC_bootstrap,
102
#endif
103
#if SDL_VIDEO_DRIVER_RISCOS
104
&RISCOS_bootstrap,
105
#endif
106
#if SDL_VIDEO_DRIVER_OS2FS
107
&OS2FSLib_bootstrap,
108
#endif
109
#if SDL_VIDEO_DRIVER_DUMMY
110
&DUMMY_bootstrap,
111
#endif
112
NULL
113
};
114
115
static SDL_VideoDevice *_this = NULL;
116
117
118
119
120
/* Various local functions */
int SDL_VideoInit(const char *driver_name, Uint32 flags);
void SDL_VideoQuit(void);
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
static int
cmpmodes(const void *A, const void *B)
{
SDL_DisplayMode a = *(const SDL_DisplayMode *) A;
SDL_DisplayMode b = *(const SDL_DisplayMode *) B;
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);
}
if (a.refresh_rate != b.refresh_rate) {
return b.refresh_rate - a.refresh_rate;
}
return 0;
}
141
142
143
144
145
146
147
static void
SDL_UninitializedVideo()
{
SDL_SetError("Video subsystem has not been initialized");
}
148
149
150
151
152
153
154
155
156
157
158
159
160
161
int
SDL_GetNumVideoDrivers(void)
{
return SDL_arraysize(bootstrap) - 1;
}
const char *
SDL_GetVideoDriver(int index)
{
if (index >= 0 && index < SDL_GetNumVideoDrivers()) {
return bootstrap[index]->name;
}
return NULL;
}
162
163
164
165
/*
* Initialize the video and event subsystems -- determine native pixel format
*/
166
167
int
SDL_VideoInit(const char *driver_name, Uint32 flags)
168
{
169
170
171
SDL_VideoDevice *video;
int index;
int i;
172
173
/* Toggle the event thread flags, based on OS requirements */
174
#if defined(MUST_THREAD_EVENTS)
175
flags |= SDL_INIT_EVENTTHREAD;
176
#elif defined(CANT_THREAD_EVENTS)
177
178
179
180
if ((flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD) {
SDL_SetError("OS doesn't support threaded events");
return -1;
}
181
182
#endif
183
184
185
186
187
188
189
190
191
192
193
194
195
/* 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;
196
197
198
if (driver_name == NULL) {
driver_name = SDL_getenv("SDL_VIDEODRIVER");
}
199
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
266
if (driver_name != NULL) {
for (i = 0; bootstrap[i]; ++i) {
if (SDL_strncmp(bootstrap[i]->name, driver_name,
SDL_strlen(bootstrap[i]->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.accelerated = -1; /* not known, don't set */
/* 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) {
267
#if SDL_VIDEO_RENDER_OGL
268
SDL_AddRenderDriver(i, &GL_RenderDriver);
269
#endif
270
if (_this->displays[i].num_render_drivers > 0) {
271
SDL_AddRenderDriver(i, &SW_RenderDriver);
272
273
274
275
276
277
}
}
/* We're ready to go! */
return 0;
}
278
279
280
281
282
const char *
SDL_GetCurrentVideoDriver()
{
if (!_this) {
283
SDL_UninitializedVideo();
284
285
286
287
return NULL;
}
return _this->name;
}
288
289
290
291
292
SDL_VideoDevice *
SDL_GetVideoDevice()
{
return _this;
293
294
}
295
296
int
SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode)
297
{
298
299
300
301
302
303
304
305
306
SDL_VideoDisplay display;
SDL_zero(display);
if (desktop_mode) {
display.desktop_mode = *desktop_mode;
}
display.current_mode = display.desktop_mode;
return SDL_AddVideoDisplay(&display);
307
308
}
309
310
int
SDL_AddVideoDisplay(const SDL_VideoDisplay * display)
311
{
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
SDL_VideoDisplay *displays;
int index = -1;
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;
}
328
329
330
331
332
int
SDL_GetNumVideoDisplays(void)
{
if (!_this) {
333
SDL_UninitializedVideo();
334
335
336
return 0;
}
return _this->num_displays;
337
338
}
339
340
int
SDL_SelectVideoDisplay(int index)
341
{
342
if (!_this) {
343
SDL_UninitializedVideo();
344
345
return (-1);
}
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
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;
}
int
SDL_GetCurrentVideoDisplay(void)
{
if (!_this) {
SDL_UninitializedVideo();
return (-1);
361
362
363
}
return _this->current_display;
}
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
SDL_bool
SDL_AddDisplayMode(int displayIndex, const SDL_DisplayMode * mode)
{
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++;
return SDL_TRUE;
396
397
}
398
399
int
SDL_GetNumDisplayModes()
400
{
401
402
403
404
405
406
407
408
409
410
411
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;
}
412
413
414
int
SDL_GetDisplayMode(int index, SDL_DisplayMode * mode)
415
416
417
418
{
if (index < 0 || index >= SDL_GetNumDisplayModes()) {
SDL_SetError("index must be in the range of 0 - %d",
SDL_GetNumDisplayModes() - 1);
419
420
421
422
return -1;
}
if (mode) {
*mode = SDL_CurrentDisplay.display_modes[index];
423
}
424
return 0;
425
426
}
427
428
int
SDL_GetDesktopDisplayMode(SDL_DisplayMode * mode)
429
{
430
431
432
if (!_this) {
SDL_UninitializedVideo();
return -1;
433
}
434
435
436
437
if (mode) {
*mode = SDL_CurrentDisplay.desktop_mode;
}
return 0;
438
}
439
440
441
int
SDL_GetCurrentDisplayMode(SDL_DisplayMode * mode)
442
{
443
444
445
if (!_this) {
SDL_UninitializedVideo();
return -1;
446
}
447
448
449
450
if (mode) {
*mode = SDL_CurrentDisplay.current_mode;
}
return 0;
451
}
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
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
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
SDL_DisplayMode *
SDL_GetClosestDisplayMode(const SDL_DisplayMode * mode,
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];
if ((current->w && current->h) &&
(current->w < mode->w || current->h < mode->h)) {
/* Out of sorted modes large enough here */
break;
}
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) {
533
closest->format = SDL_PIXELFORMAT_RGB888;
534
535
536
537
538
539
540
541
542
543
544
}
if (!closest->w) {
closest->w = 640;
}
if (!closest->h) {
closest->h = 480;
}
return closest;
}
return NULL;
}
545
546
547
548
549
550
int
SDL_SetDisplayMode(const SDL_DisplayMode * mode)
{
SDL_VideoDisplay *display;
SDL_DisplayMode display_mode;
551
SDL_DisplayMode current_mode;
552
553
554
int i, ncolors;
if (!_this) {
555
SDL_UninitializedVideo();
556
557
558
return -1;
}
559
display = &SDL_CurrentDisplay;
560
if (!mode) {
561
mode = &display->desktop_mode;
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
}
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 */
587
588
SDL_GetCurrentDisplayMode(¤t_mode);
if (SDL_memcmp(&display_mode, ¤t_mode, sizeof(display_mode)) == 0) {
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
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)) {
624
625
SDL_SetWindowPosition(window->id, SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED);
626
627
628
629
}
}
return 0;
630
631
}
632
633
634
635
int
SDL_SetFullscreenDisplayMode(const SDL_DisplayMode * mode)
{
SDL_VideoDisplay *display;
636
SDL_DisplayMode fullscreen_mode;
637
638
639
int i;
if (!_this) {
640
SDL_UninitializedVideo();
641
642
643
644
return -1;
}
display = &SDL_CurrentDisplay;
645
646
if (!mode) {
mode = &display->desktop_mode;
647
648
}
649
650
651
652
653
654
655
656
657
SDL_GetClosestDisplayMode(mode, &fullscreen_mode);
if (SDL_memcmp
(&fullscreen_mode, &display->fullscreen_mode,
sizeof(fullscreen_mode)) == 0) {
/* Nothing to do... */
return 0;
}
display->fullscreen_mode = fullscreen_mode;
658
659
660
661
/* 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)) {
662
663
664
665
666
667
if (SDL_SetDisplayMode(&display->fullscreen_mode) < 0) {
return -1;
}
}
if (window->flags & SDL_WINDOW_FULLSCREEN) {
SDL_OnWindowResized(window);
668
669
670
}
}
return 0;
671
672
}
673
674
int
SDL_GetFullscreenDisplayMode(SDL_DisplayMode * mode)
675
{
676
677
678
if (!_this) {
SDL_UninitializedVideo();
return -1;
679
}
680
if (mode) {
681
*mode = SDL_CurrentDisplay.fullscreen_mode;
682
683
}
return 0;
684
}
685
686
687
688
689
690
691
692
int
SDL_SetDisplayPalette(const SDL_Color * colors, int firstcolor, int ncolors)
{
SDL_Palette *palette;
int status = 0;
if (!_this) {
693
SDL_UninitializedVideo();
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
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);
if (_this->SetDisplayPalette) {
if (_this->SetDisplayPalette(_this, palette) < 0) {
status = -1;
}
}
return status;
}
711
712
713
714
715
716
717
int
SDL_GetDisplayPalette(SDL_Color * colors, int firstcolor, int ncolors)
{
SDL_Palette *palette;
if (!_this) {
718
SDL_UninitializedVideo();
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
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;
}
737
738
739
740
741
742
743
SDL_WindowID
SDL_CreateWindow(const char *title, int x, int y, int w, int h, Uint32 flags)
{
const Uint32 allowed_flags = (SDL_WINDOW_FULLSCREEN |
SDL_WINDOW_OPENGL |
SDL_WINDOW_BORDERLESS |
744
SDL_WINDOW_RESIZABLE);
745
746
747
748
749
750
SDL_VideoDisplay *display;
SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
751
752
753
754
755
756
SDL_UninitializedVideo();
return 0;
}
if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
SDL_SetError("No OpenGL support in video driver");
757
758
759
return 0;
}
760
761
762
763
764
765
/* Fullscreen windows don't have any window decorations */
if (flags & SDL_WINDOW_FULLSCREEN) {
flags |= SDL_WINDOW_BORDERLESS;
flags &= ~SDL_WINDOW_RESIZABLE;
}
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
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) {
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);
}
return 0;
}
windows[num_windows] = window;
display->windows = windows;
display->num_windows++;
793
794
795
796
797
798
799
800
801
802
803
804
805
806
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);
}
if (flags & SDL_WINDOW_INPUT_GRABBED) {
SDL_SetWindowGrab(window.id, 1);
807
808
}
return window.id;
809
810
}
811
812
813
814
815
816
817
818
819
SDL_WindowID
SDL_CreateWindowFrom(const void *data)
{
SDL_VideoDisplay *display;
SDL_Window window;
int num_windows;
SDL_Window *windows;
if (!_this) {
820
SDL_UninitializedVideo();
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
return (0);
}
SDL_zero(window);
window.id = _this->next_object_id++;
window.display = _this->current_display;
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;
851
852
}
853
int
854
SDL_RecreateWindow(SDL_Window * window, Uint32 flags)
855
{
856
857
char *title = window->title;
858
if ((flags & SDL_WINDOW_OPENGL) && !_this->GL_CreateContext) {
859
860
861
SDL_SetError("No OpenGL support in video driver");
return -1;
}
862
863
864
865
if (_this->DestroyWindow) {
_this->DestroyWindow(_this, window);
}
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
window->title = NULL;
window->flags =
(flags &
~(SDL_WINDOW_MAXIMIZED | SDL_WINDOW_MINIMIZED | SDL_WINDOW_SHOWN |
SDL_WINDOW_INPUT_GRABBED));
if (_this->CreateWindow && _this->CreateWindow(_this, window) < 0) {
return -1;
}
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);
}
if (flags & SDL_WINDOW_INPUT_GRABBED) {
SDL_SetWindowGrab(window->id, 1);
}
return 0;
894
895
}
896
897
898
899
900
901
SDL_Window *
SDL_GetWindowFromID(SDL_WindowID windowID)
{
int i, j;
if (!_this) {
902
SDL_UninitializedVideo();
903
904
905
906
907
908
909
910
911
912
913
914
915
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;
916
917
}
918
919
920
921
SDL_VideoDisplay *
SDL_GetDisplayFromWindow(SDL_Window * window)
{
if (!_this) {
922
SDL_UninitializedVideo();
923
924
return NULL;
}
925
926
927
if (!window) {
return NULL;
}
928
return &_this->displays[window->display];
929
930
}
931
932
933
934
935
936
937
938
939
Uint32
SDL_GetWindowFlags(SDL_WindowID windowID)
{
SDL_Window *window = SDL_GetWindowFromID(windowID);
if (!window) {
return 0;
}
return window->flags;
940
941
}
942
943
944
945
void
SDL_SetWindowTitle(SDL_WindowID windowID, const char *title)
{
SDL_Window *window = SDL_GetWindowFromID(windowID);
946
const char *last_title;
947
948
if (!window || title == window->title) {
949
950
return;
}
951
952
953
954
if (window->title) {
SDL_free(window->title);
}
955
956
957
958
959
if (title) {
window->title = SDL_strdup(title);
} else {
window->title = NULL;
}
960
961
962
963
if (_this->SetWindowTitle) {
_this->SetWindowTitle(_this, window);
}
964
965
}
966
967
968
969
970
971
972
973
974
const char *
SDL_GetWindowTitle(SDL_WindowID windowID)
{
SDL_Window *window = SDL_GetWindowFromID(windowID);
if (!window) {
return NULL;
}
return window->title;
975
976
}
977
978
979
980
981
982
983
984
985
void
SDL_SetWindowData(SDL_WindowID windowID, void *userdata)
{
SDL_Window *window = SDL_GetWindowFromID(windowID);
if (!window) {
return;
}
window->userdata = userdata;
986
987
}
988
989
void *
SDL_GetWindowData(SDL_WindowID windowID)
990
{
991
SDL_Window *window = SDL_GetWindowFromID(windowID);
992
993
994
995
996
if (!window) {
return NULL;
}
return window->userdata;
997
998
}
999
1000
void
SDL_SetWindowPosition(SDL_WindowID windowID, int x, int y)