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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children cf2af46e9e2a
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-1:000000000000 0:74212992fb08
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* The high-level video driver subsystem */
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include "SDL.h"
35 #include "SDL_error.h"
36 #include "SDL_video.h"
37 #include "SDL_events.h"
38 #include "SDL_mutex.h"
39 #include "SDL_sysvideo.h"
40 #include "SDL_sysevents.h"
41 #include "SDL_blit.h"
42 #include "SDL_pixels_c.h"
43 #include "SDL_events_c.h"
44 #include "SDL_cursor_c.h"
45
46 /* Available video drivers */
47 static VideoBootStrap *bootstrap[] = {
48 #ifdef ENABLE_X11
49 &X11_bootstrap,
50 #endif
51 #ifdef ENABLE_DGA
52 &DGA_bootstrap,
53 #endif
54 #ifdef ENABLE_FBCON
55 &FBCON_bootstrap,
56 #endif
57 #ifdef ENABLE_PS2GS
58 &PS2GS_bootstrap,
59 #endif
60 #ifdef ENABLE_GGI
61 &GGI_bootstrap,
62 #endif
63 #ifdef ENABLE_SVGALIB
64 &SVGALIB_bootstrap,
65 #endif
66 #ifdef ENABLE_AALIB
67 &AALIB_bootstrap,
68 #endif
69 #ifdef ENABLE_DIRECTX
70 &DIRECTX_bootstrap,
71 #endif
72 #ifdef ENABLE_WINDIB
73 &WINDIB_bootstrap,
74 #endif
75 #ifdef ENABLE_BWINDOW
76 &BWINDOW_bootstrap,
77 #endif
78 #ifdef ENABLE_TOOLBOX
79 &TOOLBOX_bootstrap,
80 #endif
81 #ifdef ENABLE_DRAWSPROCKET
82 &DSp_bootstrap,
83 #endif
84 #ifdef ENABLE_CYBERGRAPHICS
85 &CGX_bootstrap,
86 #endif
87 NULL
88 };
89 SDL_VideoDevice *current_video = NULL;
90
91 /* Places to store title and icon text for the app */
92 static char *wm_title = NULL;
93 static char *wm_icon = NULL;
94
95 /* Various local functions */
96 int SDL_VideoInit(const char *driver_name, Uint32 flags);
97 void SDL_VideoQuit(void);
98 void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect* rects);
99
100 static SDL_GrabMode SDL_WM_GrabInputOff(void);
101 #ifdef HAVE_OPENGL
102 static int lock_count = 0;
103 #endif
104
105
106 /*
107 * Initialize the video and event subsystems -- determine native pixel format
108 */
109 int SDL_VideoInit (const char *driver_name, Uint32 flags)
110 {
111 SDL_VideoDevice *video;
112 int index;
113 int i;
114 SDL_PixelFormat vformat;
115 Uint32 video_flags;
116
117 /* Toggle the event thread flags, based on OS requirements */
118 #if defined(MUST_THREAD_EVENTS)
119 flags |= SDL_INIT_EVENTTHREAD;
120 #elif defined(CANT_THREAD_EVENTS)
121 if ( (flags & SDL_INIT_EVENTTHREAD) == SDL_INIT_EVENTTHREAD ) {
122 SDL_SetError("OS doesn't support threaded events");
123 return(-1);
124 }
125 #endif
126
127 /* Check to make sure we don't overwrite 'current_video' */
128 if ( current_video != NULL ) {
129 SDL_VideoQuit();
130 }
131
132 /* Select the proper video driver */
133 index = 0;
134 video = NULL;
135 if ( driver_name != NULL ) {
136 #if 0 /* This will be replaced with a better driver selection API */
137 if ( strrchr(driver_name, ':') != NULL ) {
138 index = atoi(strrchr(driver_name, ':')+1);
139 }
140 #endif
141 for ( i=0; bootstrap[i]; ++i ) {
142 if ( strncmp(bootstrap[i]->name, driver_name,
143 strlen(bootstrap[i]->name)) == 0 ) {
144 if ( bootstrap[i]->available() ) {
145 video = bootstrap[i]->create(index);
146 break;
147 }
148 }
149 }
150 } else {
151 for ( i=0; bootstrap[i]; ++i ) {
152 if ( bootstrap[i]->available() ) {
153 video = bootstrap[i]->create(index);
154 if ( video != NULL ) {
155 break;
156 }
157 }
158 }
159 }
160 if ( video == NULL ) {
161 SDL_SetError("No available video device");
162 return(-1);
163 }
164 current_video = video;
165 current_video->name = bootstrap[i]->name;
166
167 /* Do some basic variable initialization */
168 video->screen = NULL;
169 video->shadow = NULL;
170 video->visible = NULL;
171 video->physpal = NULL;
172 video->gammacols = NULL;
173 video->gamma = NULL;
174 video->wm_title = NULL;
175 video->wm_icon = NULL;
176 video->offset_x = 0;
177 video->offset_y = 0;
178 memset(&video->info, 0, (sizeof video->info));
179
180 /* Set some very sane GL defaults */
181 video->gl_config.driver_loaded = 0;
182 video->gl_config.dll_handle = NULL;
183 video->gl_config.red_size = 5;
184 #if 1 /* This seems to work on more video cards, as a default */
185 video->gl_config.green_size = 5;
186 #else
187 video->gl_config.green_size = 6;
188 #endif
189 video->gl_config.blue_size = 5;
190 video->gl_config.alpha_size = 0;
191 video->gl_config.buffer_size = 0;
192 video->gl_config.depth_size = 16;
193 video->gl_config.stencil_size = 0;
194 video->gl_config.double_buffer = 1;
195 video->gl_config.accum_red_size = 0;
196 video->gl_config.accum_green_size = 0;
197 video->gl_config.accum_blue_size = 0;
198 video->gl_config.accum_alpha_size = 0;
199
200 /* Initialize the video subsystem */
201 memset(&vformat, 0, sizeof(vformat));
202 if ( video->VideoInit(video, &vformat) < 0 ) {
203 SDL_VideoQuit();
204 return(-1);
205 }
206
207 /* Create a zero sized video surface of the appropriate format */
208 video_flags = SDL_SWSURFACE;
209 SDL_VideoSurface = SDL_CreateRGBSurface(video_flags, 0, 0,
210 vformat.BitsPerPixel,
211 vformat.Rmask, vformat.Gmask, vformat.Bmask, 0);
212 if ( SDL_VideoSurface == NULL ) {
213 SDL_VideoQuit();
214 return(-1);
215 }
216 SDL_PublicSurface = NULL; /* Until SDL_SetVideoMode() */
217
218 #if 0 /* Don't change the current palette - may be used by other programs.
219 * The application can't do anything with the display surface until
220 * a video mode has been set anyway. :)
221 */
222 /* If we have a palettized surface, create a default palette */
223 if ( SDL_VideoSurface->format->palette ) {
224 SDL_PixelFormat *vf = SDL_VideoSurface->format;
225 SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel);
226 video->SetColors(video,
227 0, vf->palette->ncolors, vf->palette->colors);
228 }
229 #endif
230 video->info.vfmt = SDL_VideoSurface->format;
231
232 /* Start the event loop */
233 if ( SDL_StartEventLoop(flags) < 0 ) {
234 SDL_VideoQuit();
235 return(-1);
236 }
237 SDL_CursorInit(flags & SDL_INIT_EVENTTHREAD);
238
239 /* We're ready to go! */
240 return(0);
241 }
242
243 char *SDL_VideoDriverName(char *namebuf, int maxlen)
244 {
245 if ( current_video != NULL ) {
246 strncpy(namebuf, current_video->name, maxlen-1);
247 namebuf[maxlen-1] = '\0';
248 return(namebuf);
249 }
250 return(NULL);
251 }
252
253 /*
254 * Get the current display surface
255 */
256 SDL_Surface *SDL_GetVideoSurface(void)
257 {
258 SDL_Surface *visible;
259
260 visible = NULL;
261 if ( current_video ) {
262 visible = current_video->visible;
263 }
264 return(visible);
265 }
266
267 /*
268 * Get the current information about the video hardware
269 */
270 const SDL_VideoInfo *SDL_GetVideoInfo(void)
271 {
272 const SDL_VideoInfo *info;
273
274 info = NULL;
275 if ( current_video ) {
276 info = &current_video->info;
277 }
278 return(info);
279 }
280
281 /*
282 * Return a pointer to an array of available screen dimensions for the
283 * given format, sorted largest to smallest. Returns NULL if there are
284 * no dimensions available for a particular format, or (SDL_Rect **)-1
285 * if any dimension is okay for the given format. If 'format' is NULL,
286 * the mode list will be for the format given by SDL_GetVideoInfo()->vfmt
287 */
288 SDL_Rect ** SDL_ListModes (SDL_PixelFormat *format, Uint32 flags)
289 {
290 SDL_VideoDevice *video = current_video;
291 SDL_VideoDevice *this = current_video;
292 SDL_Rect **modes;
293
294 modes = NULL;
295 if ( SDL_VideoSurface ) {
296 if ( format == NULL ) {
297 format = SDL_VideoSurface->format;
298 }
299 modes = video->ListModes(this, format, flags);
300 }
301 return(modes);
302 }
303
304 /*
305 * Check to see if a particular video mode is supported.
306 * It returns 0 if the requested mode is not supported under any bit depth,
307 * or returns the bits-per-pixel of the closest available mode with the
308 * given width and height. If this bits-per-pixel is different from the
309 * one used when setting the video mode, SDL_SetVideoMode() will succeed,
310 * but will emulate the requested bits-per-pixel with a shadow surface.
311 */
312 static Uint8 SDL_closest_depths[4][8] = {
313 /* 8 bit closest depth ordering */
314 { 0, 8, 16, 15, 32, 24, 0, 0 },
315 /* 15,16 bit closest depth ordering */
316 { 0, 16, 15, 32, 24, 8, 0, 0 },
317 /* 24 bit closest depth ordering */
318 { 0, 24, 32, 16, 15, 8, 0, 0 },
319 /* 32 bit closest depth ordering */
320 { 0, 32, 16, 15, 24, 8, 0, 0 }
321 };
322
323 int SDL_VideoModeOK (int width, int height, int bpp, Uint32 flags)
324 {
325 int table, b, i;
326 int supported;
327 SDL_PixelFormat format;
328 SDL_Rect **sizes;
329
330 /* Currently 1 and 4 bpp are not supported */
331 if ( bpp < 8 || bpp > 32 ) {
332 return(0);
333 }
334 if ( (width == 0) || (height == 0) ) {
335 return(0);
336 }
337
338 /* Search through the list valid of modes */
339 memset(&format, 0, sizeof(format));
340 supported = 0;
341 table = ((bpp+7)/8)-1;
342 SDL_closest_depths[table][0] = bpp;
343 SDL_closest_depths[table][7] = 0;
344 for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) {
345 format.BitsPerPixel = SDL_closest_depths[table][b];
346 sizes = SDL_ListModes(&format, flags);
347 if ( sizes == (SDL_Rect **)0 ) {
348 /* No sizes supported at this bit-depth */
349 continue;
350 } else
351 #ifdef macintosh /* MPW optimization bug? */
352 if ( (sizes == (SDL_Rect **)0xFFFFFFFF) ||
353 #else
354 if ( (sizes == (SDL_Rect **)-1) ||
355 #endif
356 current_video->handles_any_size ) {
357 /* Any size supported at this bit-depth */
358 supported = 1;
359 continue;
360 } else
361 for ( i=0; sizes[i]; ++i ) {
362 if ((sizes[i]->w == width) && (sizes[i]->h == height)) {
363 supported = 1;
364 break;
365 }
366 }
367 }
368 if ( supported ) {
369 --b;
370 return(SDL_closest_depths[table][b]);
371 } else {
372 return(0);
373 }
374 }
375
376 /*
377 * Get the closest non-emulated video mode to the one requested
378 */
379 static int SDL_GetVideoMode (int *w, int *h, int *BitsPerPixel, Uint32 flags)
380 {
381 int table, b, i;
382 int supported;
383 int native_bpp;
384 SDL_PixelFormat format;
385 SDL_Rect **sizes;
386
387 /* Try the original video mode, get the closest depth */
388 native_bpp = SDL_VideoModeOK(*w, *h, *BitsPerPixel, flags);
389 if ( native_bpp == *BitsPerPixel ) {
390 return(1);
391 }
392 if ( native_bpp > 0 ) {
393 *BitsPerPixel = native_bpp;
394 return(1);
395 }
396
397 /* No exact size match at any depth, look for closest match */
398 memset(&format, 0, sizeof(format));
399 supported = 0;
400 table = ((*BitsPerPixel+7)/8)-1;
401 SDL_closest_depths[table][0] = *BitsPerPixel;
402 SDL_closest_depths[table][7] = SDL_VideoSurface->format->BitsPerPixel;
403 for ( b = 0; !supported && SDL_closest_depths[table][b]; ++b ) {
404 format.BitsPerPixel = SDL_closest_depths[table][b];
405 sizes = SDL_ListModes(&format, flags);
406 if ( sizes == (SDL_Rect **)0 ) {
407 /* No sizes supported at this bit-depth */
408 continue;
409 }
410 for ( i=0; sizes[i]; ++i ) {
411 if ((sizes[i]->w < *w) || (sizes[i]->h < *h)) {
412 if ( i > 0 ) {
413 --i;
414 *w = sizes[i]->w;
415 *h = sizes[i]->h;
416 *BitsPerPixel = SDL_closest_depths[table][b];
417 supported = 1;
418 } else {
419 /* Largest mode too small... */;
420 }
421 break;
422 }
423 }
424 if ( (i > 0) && ! sizes[i] ) {
425 /* The smallest mode was larger than requested, OK */
426 --i;
427 *w = sizes[i]->w;
428 *h = sizes[i]->h;
429 *BitsPerPixel = SDL_closest_depths[table][b];
430 supported = 1;
431 }
432 }
433 if ( ! supported ) {
434 SDL_SetError("No video mode large enough for %dx%d", *w, *h);
435 }
436 return(supported);
437 }
438
439 /* This should probably go somewhere else -- like SDL_surface.c */
440 static void SDL_ClearSurface(SDL_Surface *surface)
441 {
442 Uint32 black;
443
444 black = SDL_MapRGB(surface->format, 0, 0, 0);
445 SDL_FillRect(surface, NULL, black);
446 if ((surface->flags&SDL_HWSURFACE) && (surface->flags&SDL_DOUBLEBUF)) {
447 SDL_Flip(surface);
448 SDL_FillRect(surface, NULL, black);
449 }
450 SDL_Flip(surface);
451 }
452
453 /*
454 * Create a shadow surface suitable for fooling the app. :-)
455 */
456 static void SDL_CreateShadowSurface(int depth)
457 {
458 Uint32 Rmask, Gmask, Bmask;
459
460 /* Allocate the shadow surface */
461 if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) {
462 Rmask = (SDL_VideoSurface->format)->Rmask;
463 Gmask = (SDL_VideoSurface->format)->Gmask;
464 Bmask = (SDL_VideoSurface->format)->Bmask;
465 } else {
466 Rmask = Gmask = Bmask = 0;
467 }
468 SDL_ShadowSurface = SDL_CreateRGBSurface(SDL_SWSURFACE,
469 SDL_VideoSurface->w, SDL_VideoSurface->h,
470 depth, Rmask, Gmask, Bmask, 0);
471 if ( SDL_ShadowSurface == NULL ) {
472 return;
473 }
474
475 /* 8-bit shadow surfaces report that they have exclusive palette */
476 if ( SDL_ShadowSurface->format->palette ) {
477 SDL_ShadowSurface->flags |= SDL_HWPALETTE;
478 if ( depth == (SDL_VideoSurface->format)->BitsPerPixel ) {
479 memcpy(SDL_ShadowSurface->format->palette->colors,
480 SDL_VideoSurface->format->palette->colors,
481 SDL_VideoSurface->format->palette->ncolors*
482 sizeof(SDL_Color));
483 } else {
484 SDL_DitherColors(
485 SDL_ShadowSurface->format->palette->colors, depth);
486 }
487 }
488
489 /* If the video surface is resizable, the shadow should say so */
490 if ( (SDL_VideoSurface->flags & SDL_RESIZABLE) == SDL_RESIZABLE ) {
491 SDL_ShadowSurface->flags |= SDL_RESIZABLE;
492 }
493 /* If the video surface has no frame, the shadow should say so */
494 if ( (SDL_VideoSurface->flags & SDL_NOFRAME) == SDL_NOFRAME ) {
495 SDL_ShadowSurface->flags |= SDL_NOFRAME;
496 }
497 /* If the video surface is fullscreen, the shadow should say so */
498 if ( (SDL_VideoSurface->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
499 SDL_ShadowSurface->flags |= SDL_FULLSCREEN;
500 }
501 /* If the video surface is flippable, the shadow should say so */
502 if ( (SDL_VideoSurface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
503 SDL_ShadowSurface->flags |= SDL_DOUBLEBUF;
504 }
505 return;
506 }
507
508 /*
509 * Set the requested video mode, allocating a shadow buffer if necessary.
510 */
511 SDL_Surface * SDL_SetVideoMode (int width, int height, int bpp, Uint32 flags)
512 {
513 SDL_VideoDevice *video, *this;
514 SDL_Surface *prev_mode, *mode;
515 int video_w;
516 int video_h;
517 int video_bpp;
518 int is_opengl;
519 SDL_GrabMode saved_grab;
520
521 /* Start up the video driver, if necessary..
522 WARNING: This is the only function protected this way!
523 */
524 if ( ! current_video ) {
525 if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_NOPARACHUTE) < 0 ) {
526 return(NULL);
527 }
528 }
529 this = video = current_video;
530
531 /* Default to the current video bpp */
532 if ( bpp == 0 ) {
533 flags |= SDL_ANYFORMAT;
534 bpp = SDL_VideoSurface->format->BitsPerPixel;
535 }
536
537 /* Get a good video mode, the closest one possible */
538 video_w = width;
539 video_h = height;
540 video_bpp = bpp;
541 if ( ! SDL_GetVideoMode(&video_w, &video_h, &video_bpp, flags) ) {
542 return(NULL);
543 }
544
545 /* Check the requested flags */
546 /* There's no palette in > 8 bits-per-pixel mode */
547 if ( video_bpp > 8 ) {
548 flags &= ~SDL_HWPALETTE;
549 }
550 #if 0
551 if ( (flags&SDL_FULLSCREEN) != SDL_FULLSCREEN ) {
552 /* There's no windowed double-buffering */
553 flags &= ~SDL_DOUBLEBUF;
554 }
555 #endif
556 if ( (flags&SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
557 /* Use hardware surfaces when double-buffering */
558 flags |= SDL_HWSURFACE;
559 }
560
561 is_opengl = ( ( flags & SDL_OPENGL ) == SDL_OPENGL );
562 if ( is_opengl ) {
563 /* These flags are for 2D video modes only */
564 flags &= ~(SDL_HWSURFACE|SDL_DOUBLEBUF);
565 }
566
567 /* Clean up any previous video mode */
568 if ( SDL_PublicSurface != NULL ) {
569 SDL_PublicSurface = NULL;
570 }
571 if ( SDL_ShadowSurface != NULL ) {
572 SDL_Surface *ready_to_go;
573 ready_to_go = SDL_ShadowSurface;
574 SDL_ShadowSurface = NULL;
575 SDL_FreeSurface(ready_to_go);
576 }
577 if ( video->physpal ) {
578 free(video->physpal->colors);
579 free(video->physpal);
580 video->physpal = NULL;
581 }
582 if( video->gammacols) {
583 free(video->gammacols);
584 video->gammacols = NULL;
585 }
586
587 /* Save the previous grab state and turn off grab for mode switch */
588 saved_grab = SDL_WM_GrabInputOff();
589
590 /* Try to set the video mode, along with offset and clipping */
591 prev_mode = SDL_VideoSurface;
592 SDL_LockCursor();
593 SDL_VideoSurface = NULL; /* In case it's freed by driver */
594 mode = video->SetVideoMode(this, prev_mode,video_w,video_h,video_bpp,flags);
595 if ( mode ) { /* Prevent resize events from mode change */
596 SDL_PrivateResize(mode->w, mode->h);
597 }
598 /*
599 * rcg11292000
600 * If you try to set an SDL_OPENGL surface, and fail to find a
601 * matching visual, then the next call to SDL_SetVideoMode()
602 * will segfault, since we no longer point to a dummy surface,
603 * but rather NULL.
604 * Sam 11/29/00
605 * WARNING, we need to make sure that the previous mode hasn't
606 * already been freed by the video driver. What do we do in
607 * that case? Should we call SDL_VideoInit() again?
608 */
609 SDL_VideoSurface = (mode != NULL) ? mode : prev_mode;
610
611 if ( (mode != NULL) && (!is_opengl) ) {
612 /* Sanity check */
613 if ( (mode->w < width) || (mode->h < height) ) {
614 SDL_SetError("Video mode smaller than requested");
615 return(NULL);
616 }
617
618 /* If we have a palettized surface, create a default palette */
619 if ( mode->format->palette ) {
620 SDL_PixelFormat *vf = mode->format;
621 SDL_DitherColors(vf->palette->colors, vf->BitsPerPixel);
622 video->SetColors(this, 0, vf->palette->ncolors,
623 vf->palette->colors);
624 }
625
626 /* Clear the surface to black */
627 video->offset_x = 0;
628 video->offset_y = 0;
629 mode->offset = 0;
630 SDL_SetClipRect(mode, NULL);
631 SDL_ClearSurface(mode);
632
633 /* Now adjust the offsets to match the desired mode */
634 video->offset_x = (mode->w-width)/2;
635 video->offset_y = (mode->h-height)/2;
636 mode->offset = video->offset_y*mode->pitch +
637 video->offset_x*mode->format->BytesPerPixel;
638 #ifdef DEBUG_VIDEO
639 fprintf(stderr,
640 "Requested mode: %dx%dx%d, obtained mode %dx%dx%d (offset %d)\n",
641 width, height, bpp,
642 mode->w, mode->h, mode->format->BitsPerPixel, mode->offset);
643 #endif
644 mode->w = width;
645 mode->h = height;
646 SDL_SetClipRect(mode, NULL);
647 }
648 SDL_ResetCursor();
649 SDL_UnlockCursor();
650
651 /* If we failed setting a video mode, return NULL... (Uh Oh!) */
652 if ( mode == NULL ) {
653 return(NULL);
654 }
655
656 /* If there is no window manager, set the SDL_NOFRAME flag */
657 if ( ! video->info.wm_available ) {
658 mode->flags |= SDL_NOFRAME;
659 }
660
661 /* Reset the mouse cursor and grab for new video mode */
662 SDL_SetCursor(NULL);
663 if ( video->UpdateMouse ) {
664 video->UpdateMouse(this);
665 }
666 SDL_WM_GrabInput(saved_grab);
667 SDL_GetRelativeMouseState(NULL, NULL); /* Clear first large delta */
668
669 /* If we're running OpenGL, make the context current */
670 if ( (video->screen->flags & SDL_OPENGL) &&
671 video->GL_MakeCurrent ) {
672 if ( video->GL_MakeCurrent(this) < 0 ) {
673 return(NULL);
674 }
675 }
676
677 /* Set up a fake SDL surface for OpenGL "blitting" */
678 if ( (flags & SDL_OPENGLBLIT) == SDL_OPENGLBLIT ) {
679 /* Load GL functions for performing the texture updates */
680 #ifdef HAVE_OPENGL
681 #define SDL_PROC(ret,func,params) \
682 do { \
683 video->func = SDL_GL_GetProcAddress(#func); \
684 if ( ! video->func ) { \
685 SDL_SetError("Couldn't load GL function: %s\n", #func); \
686 return(NULL); \
687 } \
688 } while ( 0 );
689 #include "SDL_glfuncs.h"
690 #undef SDL_PROC
691
692 /* Create a software surface for blitting */
693 #ifdef GL_VERSION_1_2
694 /* If the implementation either supports the packed pixels
695 extension, or implements the core OpenGL 1.2 API, it will
696 support the GL_UNSIGNED_SHORT_5_6_5 texture format.
697 */
698 if ( (bpp == 16) &&
699 (strstr((const char *)video->glGetString(GL_EXTENSIONS),
700 "GL_EXT_packed_pixels") ||
701 (strncmp((const char *)video->glGetString(GL_VERSION),
702 "1.2", 3) == 0)) )
703 {
704 video->is_32bit = 0;
705 SDL_VideoSurface = SDL_CreateRGBSurface(
706 flags,
707 width,
708 height,
709 16,
710 31 << 11,
711 63 << 5,
712 31,
713 0
714 );
715 }
716 else
717 #endif /* OpenGL 1.2 */
718 {
719 video->is_32bit = 1;
720 SDL_VideoSurface = SDL_CreateRGBSurface(
721 flags,
722 width,
723 height,
724 32,
725 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
726 0x000000FF,
727 0x0000FF00,
728 0x00FF0000,
729 0xFF000000
730 #else
731 0xFF000000,
732 0x00FF0000,
733 0x0000FF00,
734 0x000000FF
735 #endif
736 );
737 }
738 if ( ! SDL_VideoSurface ) {
739 return(NULL);
740 }
741 SDL_VideoSurface->flags = mode->flags | SDL_OPENGLBLIT;
742
743 /* Free the original video mode surface (is this safe?) */
744 SDL_FreeSurface(mode);
745
746 /* Set the surface completely opaque & white by default */
747 memset( SDL_VideoSurface->pixels, 255, SDL_VideoSurface->h * SDL_VideoSurface->pitch );
748 video->glGenTextures( 1, &video->texture );
749 video->glBindTexture( GL_TEXTURE_2D, video->texture );
750 video->glTexImage2D(
751 GL_TEXTURE_2D,
752 0,
753 video->is_32bit ? GL_RGBA : GL_RGB,
754 256,
755 256,
756 0,
757 video->is_32bit ? GL_RGBA : GL_RGB,
758 #ifdef GL_VERSION_1_2
759 video->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5,
760 #else
761 GL_UNSIGNED_BYTE,
762 #endif
763 NULL);
764
765 video->UpdateRects = SDL_GL_UpdateRectsLock;
766 #else
767 SDL_SetError("Somebody forgot to #define HAVE_OPENGL");
768 return(NULL);
769 #endif
770 }
771
772 /* Create a shadow surface if necessary */
773 /* There are three conditions under which we create a shadow surface:
774 1. We need a particular bits-per-pixel that we didn't get.
775 2. We need a hardware palette and didn't get one.
776 3. We need a software surface and got a hardware surface.
777 */
778 if ( !(SDL_VideoSurface->flags & SDL_OPENGL) &&
779 (
780 ( !(flags&SDL_ANYFORMAT) &&
781 (SDL_VideoSurface->format->BitsPerPixel != bpp)) ||
782 ( (flags&SDL_HWPALETTE) &&
783 !(SDL_VideoSurface->flags&SDL_HWPALETTE)) ||
784 /* If the surface is in hardware, video writes are visible
785 as soon as they are performed, so we need to buffer them
786 */
787 ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) &&
788 (SDL_VideoSurface->flags&SDL_HWSURFACE))
789 ) ) {
790 SDL_CreateShadowSurface(bpp);
791 if ( SDL_ShadowSurface == NULL ) {
792 SDL_SetError("Couldn't create shadow surface");
793 return(NULL);
794 }
795 SDL_PublicSurface = SDL_ShadowSurface;
796 } else {
797 SDL_PublicSurface = SDL_VideoSurface;
798 }
799 video->info.vfmt = SDL_VideoSurface->format;
800
801 /* We're done! */
802 return(SDL_PublicSurface);
803 }
804
805 /*
806 * Convert a surface into the video pixel format.
807 */
808 SDL_Surface * SDL_DisplayFormat (SDL_Surface *surface)
809 {
810 Uint32 flags;
811
812 if ( ! SDL_PublicSurface ) {
813 SDL_SetError("No video mode has been set");
814 return(NULL);
815 }
816 /* Set the flags appropriate for copying to display surface */
817 flags = (SDL_PublicSurface->flags&SDL_HWSURFACE);
818 #ifdef AUTORLE_DISPLAYFORMAT
819 flags |= (surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA));
820 flags |= SDL_RLEACCELOK;
821 #else
822 flags |= surface->flags & (SDL_SRCCOLORKEY|SDL_SRCALPHA|SDL_RLEACCELOK);
823 #endif
824 return(SDL_ConvertSurface(surface, SDL_PublicSurface->format, flags));
825 }
826
827 /*
828 * Convert a surface into a format that's suitable for blitting to
829 * the screen, but including an alpha channel.
830 */
831 SDL_Surface *SDL_DisplayFormatAlpha(SDL_Surface *surface)
832 {
833 SDL_PixelFormat *vf;
834 SDL_PixelFormat *format;
835 SDL_Surface *converted;
836 Uint32 flags;
837 /* default to ARGB8888 */
838 Uint32 amask = 0xff000000;
839 Uint32 rmask = 0x00ff0000;
840 Uint32 gmask = 0x0000ff00;
841 Uint32 bmask = 0x000000ff;
842
843 if ( ! SDL_PublicSurface ) {
844 SDL_SetError("No video mode has been set");
845 return(NULL);
846 }
847 vf = SDL_PublicSurface->format;
848
849 switch(vf->BytesPerPixel) {
850 case 2:
851 /* For XGY5[56]5, use, AXGY8888, where {X, Y} = {R, B}.
852 For anything else (like ARGB4444) it doesn't matter
853 since we have no special code for it anyway */
854 if ( (vf->Rmask == 0x1f) &&
855 (vf->Bmask == 0xf800 || vf->Bmask == 0x7c00)) {
856 rmask = 0xff;
857 bmask = 0xff0000;
858 }
859 break;
860
861 case 3:
862 case 4:
863 /* Keep the video format, as long as the high 8 bits are
864 unused or alpha */
865 if ( (vf->Rmask == 0xff) && (vf->Bmask == 0xff0000) ) {
866 rmask = 0xff;
867 bmask = 0xff0000;
868 }
869 break;
870
871 default:
872 /* We have no other optimised formats right now. When/if a new
873 optimised alpha format is written, add the converter here */
874 break;
875 }
876 format = SDL_AllocFormat(32, rmask, gmask, bmask, amask);
877 flags = SDL_PublicSurface->flags & SDL_HWSURFACE;
878 flags |= surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK);
879 converted = SDL_ConvertSurface(surface, format, flags);
880 SDL_FreeFormat(format);
881 return(converted);
882 }
883
884 /*
885 * Update a specific portion of the physical screen
886 */
887 void SDL_UpdateRect(SDL_Surface *screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
888 {
889 if ( screen ) {
890 SDL_Rect rect;
891
892 /* Perform some checking */
893 if ( w == 0 )
894 w = screen->w;
895 if ( h == 0 )
896 h = screen->h;
897 if ( (int)(x+w) > screen->w )
898 return;
899 if ( (int)(y+h) > screen->h )
900 return;
901
902 /* Fill the rectangle */
903 rect.x = x;
904 rect.y = y;
905 rect.w = w;
906 rect.h = h;
907 SDL_UpdateRects(screen, 1, &rect);
908 }
909 }
910 void SDL_UpdateRects (SDL_Surface *screen, int numrects, SDL_Rect *rects)
911 {
912 int i;
913 SDL_VideoDevice *video = current_video;
914 SDL_VideoDevice *this = current_video;
915
916 if ( screen == SDL_ShadowSurface ) {
917 /* Blit the shadow surface using saved mapping */
918 SDL_Palette *pal = screen->format->palette;
919 SDL_Color *saved_colors = NULL;
920 if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) {
921 /* simulated 8bpp, use correct physical palette */
922 saved_colors = pal->colors;
923 if ( video->gammacols ) {
924 /* gamma-corrected palette */
925 pal->colors = video->gammacols;
926 } else if ( video->physpal ) {
927 /* physical palette different from logical */
928 pal->colors = video->physpal->colors;
929 }
930 }
931 if ( SHOULD_DRAWCURSOR(SDL_cursorstate) ) {
932 SDL_LockCursor();
933 SDL_DrawCursor(SDL_ShadowSurface);
934 for ( i=0; i<numrects; ++i ) {
935 SDL_LowerBlit(SDL_ShadowSurface, &rects[i],
936 SDL_VideoSurface, &rects[i]);
937 }
938 SDL_EraseCursor(SDL_ShadowSurface);
939 SDL_UnlockCursor();
940 } else {
941 for ( i=0; i<numrects; ++i ) {
942 SDL_LowerBlit(SDL_ShadowSurface, &rects[i],
943 SDL_VideoSurface, &rects[i]);
944 }
945 }
946 if ( saved_colors )
947 pal->colors = saved_colors;
948
949 /* Fall through to video surface update */
950 screen = SDL_VideoSurface;
951 }
952 if ( screen == SDL_VideoSurface ) {
953 /* Update the video surface */
954 if ( screen->offset ) {
955 for ( i=0; i<numrects; ++i ) {
956 rects[i].x += video->offset_x;
957 rects[i].y += video->offset_y;
958 }
959 video->UpdateRects(this, numrects, rects);
960 for ( i=0; i<numrects; ++i ) {
961 rects[i].x -= video->offset_x;
962 rects[i].y -= video->offset_y;
963 }
964 } else {
965 video->UpdateRects(this, numrects, rects);
966 }
967 }
968 }
969
970 /*
971 * Performs hardware double buffering, if possible, or a full update if not.
972 */
973 int SDL_Flip(SDL_Surface *screen)
974 {
975 SDL_VideoDevice *video = current_video;
976 /* Copy the shadow surface to the video surface */
977 if ( screen == SDL_ShadowSurface ) {
978 SDL_Rect rect;
979 SDL_Palette *pal = screen->format->palette;
980 SDL_Color *saved_colors = NULL;
981 if ( pal && !(SDL_VideoSurface->flags & SDL_HWPALETTE) ) {
982 /* simulated 8bpp, use correct physical palette */
983 saved_colors = pal->colors;
984 if ( video->gammacols ) {
985 /* gamma-corrected palette */
986 pal->colors = video->gammacols;
987 } else if ( video->physpal ) {
988 /* physical palette different from logical */
989 pal->colors = video->physpal->colors;
990 }
991 }
992
993 rect.x = 0;
994 rect.y = 0;
995 rect.w = screen->w;
996 rect.h = screen->h;
997 SDL_LowerBlit(SDL_ShadowSurface,&rect, SDL_VideoSurface,&rect);
998
999 if ( saved_colors )
1000 pal->colors = saved_colors;
1001 screen = SDL_VideoSurface;
1002 }
1003 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
1004 SDL_VideoDevice *this = current_video;
1005 return(video->FlipHWSurface(this, SDL_VideoSurface));
1006 } else {
1007 SDL_UpdateRect(screen, 0, 0, 0, 0);
1008 }
1009 return(0);
1010 }
1011
1012 static void SetPalette_logical(SDL_Surface *screen, SDL_Color *colors,
1013 int firstcolor, int ncolors)
1014 {
1015 SDL_Palette *pal = screen->format->palette;
1016 SDL_Palette *vidpal;
1017
1018 if ( colors != (pal->colors + firstcolor) ) {
1019 memcpy(pal->colors + firstcolor, colors,
1020 ncolors * sizeof(*colors));
1021 }
1022
1023 vidpal = SDL_VideoSurface->format->palette;
1024 if ( (screen == SDL_ShadowSurface) && vidpal ) {
1025 /*
1026 * This is a shadow surface, and the physical
1027 * framebuffer is also indexed. Propagate the
1028 * changes to its logical palette so that
1029 * updates are always identity blits
1030 */
1031 memcpy(vidpal->colors + firstcolor, colors,
1032 ncolors * sizeof(*colors));
1033 }
1034 SDL_FormatChanged(screen);
1035 }
1036
1037 static int SetPalette_physical(SDL_Surface *screen,
1038 SDL_Color *colors, int firstcolor, int ncolors)
1039 {
1040 SDL_VideoDevice *video = current_video;
1041 int gotall = 1;
1042
1043 if ( video->physpal ) {
1044 /* We need to copy the new colors, since we haven't
1045 * already done the copy in the logical set above.
1046 */
1047 memcpy(video->physpal->colors + firstcolor,
1048 colors, ncolors * sizeof(*colors));
1049 }
1050 if ( screen == SDL_ShadowSurface ) {
1051 if ( SDL_VideoSurface->flags & SDL_HWPALETTE ) {
1052 /*
1053 * The real screen is also indexed - set its physical
1054 * palette. The physical palette does not include the
1055 * gamma modification, we apply it directly instead,
1056 * but this only happens if we have hardware palette.
1057 */
1058 screen = SDL_VideoSurface;
1059 } else {
1060 /*
1061 * The video surface is not indexed - invalidate any
1062 * active shadow-to-video blit mappings.
1063 */
1064 if ( screen->map->dst == SDL_VideoSurface ) {
1065 SDL_InvalidateMap(screen->map);
1066 }
1067 if ( video->gamma ) {
1068 if( ! video->gammacols ) {
1069 SDL_Palette *pp = video->physpal;
1070 if(!pp)
1071 pp = screen->format->palette;
1072 video->gammacols = malloc(pp->ncolors
1073 * sizeof(SDL_Color));
1074 SDL_ApplyGamma(video->gamma,
1075 pp->colors,
1076 video->gammacols,
1077 pp->ncolors);
1078 } else {
1079 SDL_ApplyGamma(video->gamma, colors,
1080 video->gammacols
1081 + firstcolor,
1082 ncolors);
1083 }
1084 }
1085 SDL_UpdateRect(screen, 0, 0, 0, 0);
1086 }
1087 }
1088
1089 if ( screen == SDL_VideoSurface ) {
1090 SDL_Color gcolors[256];
1091
1092 if ( video->gamma ) {
1093 SDL_ApplyGamma(video->gamma, colors, gcolors, ncolors);
1094 colors = gcolors;
1095 }
1096 gotall = video->SetColors(video, firstcolor, ncolors, colors);
1097 if ( ! gotall ) {
1098 /* The video flags shouldn't have SDL_HWPALETTE, and
1099 the video driver is responsible for copying back the
1100 correct colors into the video surface palette.
1101 */
1102 ;
1103 }
1104 SDL_CursorPaletteChanged();
1105 }
1106 return gotall;
1107 }
1108
1109 /*
1110 * Set the physical and/or logical colormap of a surface:
1111 * Only the screen has a physical colormap. It determines what is actually
1112 * sent to the display.
1113 * The logical colormap is used to map blits to/from the surface.
1114 * 'which' is one or both of SDL_LOGPAL, SDL_PHYSPAL
1115 *
1116 * Return nonzero if all colours were set as requested, or 0 otherwise.
1117 */
1118 int SDL_SetPalette(SDL_Surface *screen, int which,
1119 SDL_Color *colors, int firstcolor, int ncolors)
1120 {
1121 SDL_Palette *pal;
1122 int gotall;
1123 int palsize;
1124
1125 if ( screen != SDL_PublicSurface ) {
1126 /* only screens have physical palettes */
1127 which &= ~SDL_PHYSPAL;
1128 } else if( (screen->flags & SDL_HWPALETTE) != SDL_HWPALETTE ) {
1129 /* hardware palettes required for split colormaps */
1130 which |= SDL_PHYSPAL | SDL_LOGPAL;
1131 }
1132
1133 /* Verify the parameters */
1134 pal = screen->format->palette;
1135 if( !pal ) {
1136 return 0; /* not a palettized surface */
1137 }
1138 gotall = 1;
1139 palsize = 1 << screen->format->BitsPerPixel;
1140 if ( ncolors > (palsize - firstcolor) ) {
1141 ncolors = (palsize - firstcolor);
1142 gotall = 0;
1143 }
1144
1145 if ( which & SDL_LOGPAL ) {
1146 /*
1147 * Logical palette change: The actual screen isn't affected,
1148 * but the internal colormap is altered so that the
1149 * interpretation of the pixel values (for blits etc) is
1150 * changed.
1151 */
1152 SetPalette_logical(screen, colors, firstcolor, ncolors);
1153 }
1154 if ( which & SDL_PHYSPAL ) {
1155 SDL_VideoDevice *video = current_video;
1156 /*
1157 * Physical palette change: This doesn't affect the
1158 * program's idea of what the screen looks like, but changes
1159 * its actual appearance.
1160 */
1161 if(!video)
1162 return gotall; /* video not yet initialized */
1163 if(!video->physpal && !(which & SDL_LOGPAL) ) {
1164 /* Lazy physical palette allocation */
1165 int size;
1166 SDL_Palette *pp = malloc(sizeof(*pp));
1167 current_video->physpal = pp;
1168 pp->ncolors = pal->ncolors;
1169 size = pp->ncolors * sizeof(SDL_Color);
1170 pp->colors = malloc(size);
1171 memcpy(pp->colors, pal->colors, size);
1172 }
1173 if ( ! SetPalette_physical(screen,
1174 colors, firstcolor, ncolors) ) {
1175 gotall = 0;
1176 }
1177 }
1178 return gotall;
1179 }
1180
1181 int SDL_SetColors(SDL_Surface *screen, SDL_Color *colors, int firstcolor,
1182 int ncolors)
1183 {
1184 return SDL_SetPalette(screen, SDL_LOGPAL | SDL_PHYSPAL,
1185 colors, firstcolor, ncolors);
1186 }
1187
1188 /*
1189 * Clean up the video subsystem
1190 */
1191 void SDL_VideoQuit (void)
1192 {
1193 SDL_Surface *ready_to_go;
1194
1195 if ( current_video ) {
1196 SDL_VideoDevice *video = current_video;
1197 SDL_VideoDevice *this = current_video;
1198
1199 /* Halt event processing before doing anything else */
1200 SDL_StopEventLoop();
1201
1202 /* Clean up allocated window manager items */
1203 if ( SDL_PublicSurface ) {
1204 SDL_PublicSurface = NULL;
1205 }
1206 SDL_CursorQuit();
1207
1208 /* Just in case... */
1209 SDL_WM_GrabInputOff();
1210
1211 /* Clean up the system video */
1212 video->VideoQuit(this);
1213
1214 /* Free any lingering surfaces */
1215 ready_to_go = SDL_ShadowSurface;
1216 SDL_ShadowSurface = NULL;
1217 SDL_FreeSurface(ready_to_go);
1218 if ( SDL_VideoSurface != NULL ) {
1219 ready_to_go = SDL_VideoSurface;
1220 SDL_VideoSurface = NULL;
1221 SDL_FreeSurface(ready_to_go);
1222 }
1223 SDL_PublicSurface = NULL;
1224
1225 /* Clean up miscellaneous memory */
1226 if ( video->physpal ) {
1227 free(video->physpal->colors);
1228 free(video->physpal);
1229 video->physpal = NULL;
1230 }
1231 if ( video->gammacols ) {
1232 free(video->gammacols);
1233 video->gammacols = NULL;
1234 }
1235 if ( video->gamma ) {
1236 free(video->gamma);
1237 video->gamma = NULL;
1238 }
1239 if ( wm_title != NULL ) {
1240 free(wm_title);
1241 wm_title = NULL;
1242 }
1243 if ( wm_icon != NULL ) {
1244 free(wm_icon);
1245 wm_icon = NULL;
1246 }
1247
1248 /* Finish cleaning up video subsystem */
1249 video->free(this);
1250 current_video = NULL;
1251 }
1252 return;
1253 }
1254
1255 /* Load the GL driver library */
1256 int SDL_GL_LoadLibrary(const char *path)
1257 {
1258 SDL_VideoDevice *video = current_video;
1259 SDL_VideoDevice *this = current_video;
1260 int retval;
1261
1262 retval = -1;
1263 if ( video->GL_LoadLibrary ) {
1264 retval = video->GL_LoadLibrary(this, path);
1265 } else {
1266 SDL_SetError("No dynamic GL support in video driver");
1267 }
1268 return(retval);
1269 }
1270
1271 void *SDL_GL_GetProcAddress(const char* proc)
1272 {
1273 SDL_VideoDevice *video = current_video;
1274 SDL_VideoDevice *this = current_video;
1275 void *func;
1276
1277 func = NULL;
1278 if ( video->GL_GetProcAddress ) {
1279 if ( video->gl_config.driver_loaded ) {
1280 func = video->GL_GetProcAddress(this, proc);
1281 } else {
1282 SDL_SetError("No GL driver has been loaded");
1283 }
1284 } else {
1285 SDL_SetError("No dynamic GL support in video driver");
1286 }
1287 return func;
1288 }
1289
1290 /* Set the specified GL attribute for setting up a GL video mode */
1291 int SDL_GL_SetAttribute( SDL_GLattr attr, int value )
1292 {
1293 int retval;
1294 SDL_VideoDevice *video = current_video;
1295
1296 retval = 0;
1297 switch (attr) {
1298 case SDL_GL_RED_SIZE:
1299 video->gl_config.red_size = value;
1300 break;
1301 case SDL_GL_GREEN_SIZE:
1302 video->gl_config.green_size = value;
1303 break;
1304 case SDL_GL_BLUE_SIZE:
1305 video->gl_config.blue_size = value;
1306 break;
1307 case SDL_GL_ALPHA_SIZE:
1308 video->gl_config.alpha_size = value;
1309 break;
1310 case SDL_GL_DOUBLEBUFFER:
1311 video->gl_config.double_buffer = value;
1312 break;
1313 case SDL_GL_BUFFER_SIZE:
1314 video->gl_config.buffer_size = value;
1315 break;
1316 case SDL_GL_DEPTH_SIZE:
1317 video->gl_config.depth_size = value;
1318 break;
1319 case SDL_GL_STENCIL_SIZE:
1320 video->gl_config.stencil_size = value;
1321 break;
1322 case SDL_GL_ACCUM_RED_SIZE:
1323 video->gl_config.accum_red_size = value;
1324 break;
1325 case SDL_GL_ACCUM_GREEN_SIZE:
1326 video->gl_config.accum_green_size = value;
1327 break;
1328 case SDL_GL_ACCUM_BLUE_SIZE:
1329 video->gl_config.accum_blue_size = value;
1330 break;
1331 case SDL_GL_ACCUM_ALPHA_SIZE:
1332 video->gl_config.accum_alpha_size = value;
1333 break;
1334 default:
1335 SDL_SetError("Unknown OpenGL attribute");
1336 retval = -1;
1337 break;
1338 }
1339 return(retval);
1340 }
1341
1342 /* Retrieve an attribute value from the windowing system. */
1343 int SDL_GL_GetAttribute(SDL_GLattr attr, int* value)
1344 {
1345 int retval = -1;
1346 SDL_VideoDevice* video = current_video;
1347 SDL_VideoDevice* this = current_video;
1348
1349 if ( video->GL_GetAttribute ) {
1350 retval = this->GL_GetAttribute(this, attr, value);
1351 }
1352
1353 return retval;
1354 }
1355
1356 /* Perform a GL buffer swap on the current GL context */
1357 void SDL_GL_SwapBuffers(void)
1358 {
1359 SDL_VideoDevice *video = current_video;
1360 SDL_VideoDevice *this = current_video;
1361
1362 if ( video->screen->flags & SDL_OPENGL ) {
1363 video->GL_SwapBuffers( this );
1364 }
1365 }
1366
1367 /* Update rects with locking */
1368 void SDL_GL_UpdateRectsLock(SDL_VideoDevice* this, int numrects, SDL_Rect *rects)
1369 {
1370 SDL_GL_Lock();
1371 SDL_GL_UpdateRects(numrects, rects);
1372 SDL_GL_Unlock();
1373 }
1374
1375 /* Update rects without state setting and changing (the caller is responsible for it) */
1376 void SDL_GL_UpdateRects(int numrects, SDL_Rect *rects)
1377 {
1378 #ifdef HAVE_OPENGL
1379 SDL_VideoDevice *this = current_video;
1380 SDL_Rect update, tmp;
1381 int x, y, i;
1382
1383 for ( i = 0; i < numrects; i++ )
1384 {
1385 tmp.y = rects[i].y;
1386 tmp.h = rects[i].h;
1387 for ( y = 0; y <= rects[i].h / 256; y++ )
1388 {
1389 tmp.x = rects[i].x;
1390 tmp.w = rects[i].w;
1391 for ( x = 0; x <= rects[i].w / 256; x++ )
1392 {
1393 update.x = tmp.x;
1394 update.y = tmp.y;
1395 update.w = tmp.w;
1396 update.h = tmp.h;
1397
1398 if ( update.w > 256 )
1399 update.w = 256;
1400
1401 if ( update.h > 256 )
1402 update.h = 256;
1403
1404 this->glFlush();
1405 this->glTexSubImage2D(
1406 GL_TEXTURE_2D,
1407 0,
1408 0,
1409 0,
1410 update.w,
1411 update.h,
1412 this->is_32bit? GL_RGBA : GL_RGB,
1413 #ifdef GL_VERSION_1_2
1414 this->is_32bit ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT_5_6_5,
1415 #else
1416 GL_UNSIGNED_BYTE,
1417 #endif
1418 (Uint8 *)this->screen->pixels +
1419 this->screen->format->BytesPerPixel * update.x +
1420 update.y * this->screen->pitch );
1421
1422 this->glFlush();
1423 /*
1424 * Note the parens around the function name:
1425 * This is because some OpenGL implementations define glTexCoord etc
1426 * as macros, and we don't want them expanded here.
1427 */
1428 this->glBegin(GL_TRIANGLE_STRIP);
1429 (this->glTexCoord2f)( 0.0, 0.0 );
1430 (this->glVertex2i)( update.x, update.y );
1431 (this->glTexCoord2f)( (float)(update.w / 256.0), 0.0 );
1432 (this->glVertex2i)( update.x + update.w, update.y );
1433 (this->glTexCoord2f)( 0.0, (float)(update.h / 256.0) );
1434 (this->glVertex2i)( update.x, update.y + update.h );
1435 (this->glTexCoord2f)( (float)(update.w / 256.0), (float)(update.h / 256.0) );
1436 (this->glVertex2i)( update.x + update.w , update.y + update.h );
1437 this->glEnd();
1438
1439 tmp.x += 256;
1440 tmp.w -= 256;
1441 }
1442 tmp.y += 256;
1443 tmp.h -= 256;
1444 }
1445 }
1446 #endif
1447 }
1448
1449 /* Lock == save current state */
1450 void SDL_GL_Lock()
1451 {
1452 #ifdef HAVE_OPENGL
1453 lock_count--;
1454 if (lock_count==-1)
1455 {
1456 SDL_VideoDevice *this = current_video;
1457
1458 this->glPushAttrib( GL_ALL_ATTRIB_BITS ); /* TODO: narrow range of what is saved */
1459 this->glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
1460
1461 this->glEnable(GL_TEXTURE_2D);
1462 this->glEnable(GL_BLEND);
1463 this->glDisable(GL_FOG);
1464 this->glDisable(GL_ALPHA_TEST);
1465 this->glDisable(GL_DEPTH_TEST);
1466 this->glDisable(GL_SCISSOR_TEST);
1467 this->glDisable(GL_STENCIL_TEST);
1468 this->glDisable(GL_CULL_FACE);
1469
1470 this->glBindTexture( GL_TEXTURE_2D, this->texture );
1471 this->glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
1472 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
1473 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
1474 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
1475 this->glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
1476
1477 this->glPixelStorei( GL_UNPACK_ROW_LENGTH, this->screen->pitch / this->screen->format->BytesPerPixel );
1478 this->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1479 (this->glColor4f)(1.0, 1.0, 1.0, 1.0); /* Solaris workaround */
1480
1481 this->glViewport(0, 0, this->screen->w, this->screen->h);
1482 this->glMatrixMode(GL_PROJECTION);
1483 this->glPushMatrix();
1484 this->glLoadIdentity();
1485
1486 this->glOrtho(0.0, (GLdouble) this->screen->w, (GLdouble) this->screen->h, 0.0, 0.0, 1.0);
1487
1488 this->glMatrixMode(GL_MODELVIEW);
1489 this->glPushMatrix();
1490 this->glLoadIdentity();
1491 }
1492 #endif
1493 }
1494
1495 /* Unlock == restore saved state */
1496 void SDL_GL_Unlock()
1497 {
1498 #ifdef HAVE_OPENGL
1499 lock_count++;
1500 if (lock_count==0)
1501 {
1502 SDL_VideoDevice *this = current_video;
1503
1504 this->glPopMatrix();
1505 this->glMatrixMode(GL_PROJECTION);
1506 this->glPopMatrix();
1507
1508 this->glPopClientAttrib();
1509 this->glPopAttrib();
1510 }
1511 #endif
1512 }
1513
1514 /*
1515 * Sets/Gets the title and icon text of the display window, if any.
1516 */
1517 void SDL_WM_SetCaption (const char *title, const char *icon)
1518 {
1519 SDL_VideoDevice *video = current_video;
1520 SDL_VideoDevice *this = current_video;
1521
1522 if ( title ) {
1523 if ( wm_title ) {
1524 free(wm_title);
1525 }
1526 wm_title = (char *)malloc(strlen(title)+1);
1527 if ( wm_title != NULL ) {
1528 strcpy(wm_title, title);
1529 }
1530 }
1531 if ( icon ) {
1532 if ( wm_icon ) {
1533 free(wm_icon);
1534 }
1535 wm_icon = (char *)malloc(strlen(icon)+1);
1536 if ( wm_icon != NULL ) {
1537 strcpy(wm_icon, icon);
1538 }
1539 }
1540 if ( (title || icon) && video && (video->SetCaption != NULL) ) {
1541 video->SetCaption(this, wm_title, wm_icon);
1542 }
1543 }
1544 void SDL_WM_GetCaption (char **title, char **icon)
1545 {
1546 if ( title ) {
1547 *title = wm_title;
1548 }
1549 if ( icon ) {
1550 *icon = wm_icon;
1551 }
1552 }
1553
1554 /* Utility function used by SDL_WM_SetIcon() */
1555 static void CreateMaskFromColorKey(SDL_Surface *icon, Uint8 *mask)
1556 {
1557 int x, y;
1558 Uint32 colorkey;
1559 #define SET_MASKBIT(icon, x, y, mask) \
1560 mask[(y*((icon->w+7)/8))+(x/8)] &= ~(0x01<<(7-(x%8)))
1561
1562 colorkey = icon->format->colorkey;
1563 switch (icon->format->BytesPerPixel) {
1564 case 1: { Uint8 *pixels;
1565 for ( y=0; y<icon->h; ++y ) {
1566 pixels = (Uint8 *)icon->pixels + y*icon->pitch;
1567 for ( x=0; x<icon->w; ++x ) {
1568 if ( *pixels++ == colorkey ) {
1569 SET_MASKBIT(icon, x, y, mask);
1570 }
1571 }
1572 }
1573 }
1574 break;
1575
1576 case 2: { Uint16 *pixels;
1577 for ( y=0; y<icon->h; ++y ) {
1578 pixels = (Uint16 *)icon->pixels +
1579 y*icon->pitch/2;
1580 for ( x=0; x<icon->w; ++x ) {
1581 if ( *pixels++ == colorkey ) {
1582 SET_MASKBIT(icon, x, y, mask);
1583 }
1584 }
1585 }
1586 }
1587 break;
1588
1589 case 4: { Uint32 *pixels;
1590 for ( y=0; y<icon->h; ++y ) {
1591 pixels = (Uint32 *)icon->pixels +
1592 y*icon->pitch/4;
1593 for ( x=0; x<icon->w; ++x ) {
1594 if ( *pixels++ == colorkey ) {
1595 SET_MASKBIT(icon, x, y, mask);
1596 }
1597 }
1598 }
1599 }
1600 break;
1601 }
1602 }
1603
1604 /*
1605 * Sets the window manager icon for the display window.
1606 */
1607 void SDL_WM_SetIcon (SDL_Surface *icon, Uint8 *mask)
1608 {
1609 SDL_VideoDevice *video = current_video;
1610 SDL_VideoDevice *this = current_video;
1611
1612 if ( icon && video->SetIcon ) {
1613 /* Generate a mask if necessary, and create the icon! */
1614 if ( mask == NULL ) {
1615 int mask_len = icon->h*(icon->w+7)/8;
1616 mask = (Uint8 *)malloc(mask_len);
1617 if ( mask == NULL ) {
1618 return;
1619 }
1620 memset(mask, ~0, mask_len);
1621 if ( icon->flags & SDL_SRCCOLORKEY ) {
1622 CreateMaskFromColorKey(icon, mask);
1623 }
1624 video->SetIcon(video, icon, mask);
1625 free(mask);
1626 } else {
1627 video->SetIcon(this, icon, mask);
1628 }
1629 }
1630 }
1631
1632 /*
1633 * Grab or ungrab the keyboard and mouse input.
1634 * This function returns the final grab mode after calling the
1635 * driver dependent function.
1636 */
1637 static SDL_GrabMode SDL_WM_GrabInputRaw(SDL_GrabMode mode)
1638 {
1639 SDL_VideoDevice *video = current_video;
1640 SDL_VideoDevice *this = current_video;
1641
1642 /* Only do something if we have support for grabs */
1643 if ( video->GrabInput == NULL ) {
1644 return(video->input_grab);
1645 }
1646
1647 /* If the final grab mode if off, only then do we actually grab */
1648 #ifdef DEBUG_GRAB
1649 printf("SDL_WM_GrabInputRaw(%d) ... ", mode);
1650 #endif
1651 if ( mode == SDL_GRAB_OFF ) {
1652 if ( video->input_grab != SDL_GRAB_OFF ) {
1653 mode = video->GrabInput(this, mode);
1654 }
1655 } else {
1656 if ( video->input_grab == SDL_GRAB_OFF ) {
1657 mode = video->GrabInput(this, mode);
1658 }
1659 }
1660 if ( mode != video->input_grab ) {
1661 video->input_grab = mode;
1662 if ( video->CheckMouseMode ) {
1663 video->CheckMouseMode(this);
1664 }
1665 }
1666 #ifdef DEBUG_GRAB
1667 printf("Final mode %d\n", video->input_grab);
1668 #endif
1669
1670 /* Return the final grab state */
1671 if ( mode >= SDL_GRAB_FULLSCREEN ) {
1672 mode -= SDL_GRAB_FULLSCREEN;
1673 }
1674 return(mode);
1675 }
1676 SDL_GrabMode SDL_WM_GrabInput(SDL_GrabMode mode)
1677 {
1678 SDL_VideoDevice *video = current_video;
1679
1680 /* If the video isn't initialized yet, we can't do anything */
1681 if ( ! video ) {
1682 return SDL_GRAB_OFF;
1683 }
1684
1685 /* Return the current mode on query */
1686 if ( mode == SDL_GRAB_QUERY ) {
1687 mode = video->input_grab;
1688 if ( mode >= SDL_GRAB_FULLSCREEN ) {
1689 mode -= SDL_GRAB_FULLSCREEN;
1690 }
1691 return(mode);
1692 }
1693
1694 #ifdef DEBUG_GRAB
1695 printf("SDL_WM_GrabInput(%d) ... ", mode);
1696 #endif
1697 /* If the video surface is fullscreen, we always grab */
1698 if ( mode >= SDL_GRAB_FULLSCREEN ) {
1699 mode -= SDL_GRAB_FULLSCREEN;
1700 }
1701 if ( SDL_VideoSurface && (SDL_VideoSurface->flags & SDL_FULLSCREEN) ) {
1702 mode += SDL_GRAB_FULLSCREEN;
1703 }
1704 return(SDL_WM_GrabInputRaw(mode));
1705 }
1706 static SDL_GrabMode SDL_WM_GrabInputOff(void)
1707 {
1708 SDL_GrabMode mode;
1709
1710 /* First query the current grab state */
1711 mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
1712
1713 /* Now explicitly turn off input grab */
1714 SDL_WM_GrabInputRaw(SDL_GRAB_OFF);
1715
1716 /* Return the old state */
1717 return(mode);
1718 }
1719
1720 /*
1721 * Iconify the window in window managed environments.
1722 * A successful iconification will result in an SDL_APPACTIVE loss event.
1723 */
1724 int SDL_WM_IconifyWindow(void)
1725 {
1726 SDL_VideoDevice *video = current_video;
1727 SDL_VideoDevice *this = current_video;
1728 int retval;
1729
1730 retval = 0;
1731 if ( video->IconifyWindow ) {
1732 retval = video->IconifyWindow(this);
1733 }
1734 return(retval);
1735 }
1736
1737 /*
1738 * Toggle fullscreen mode
1739 */
1740 int SDL_WM_ToggleFullScreen(SDL_Surface *surface)
1741 {
1742 SDL_VideoDevice *video = current_video;
1743 SDL_VideoDevice *this = current_video;
1744 int toggled;
1745
1746 toggled = 0;
1747 if ( SDL_PublicSurface && (surface == SDL_PublicSurface) &&
1748 video->ToggleFullScreen ) {
1749 if ( surface->flags & SDL_FULLSCREEN ) {
1750 toggled = video->ToggleFullScreen(this, 0);
1751 if ( toggled ) {
1752 SDL_VideoSurface->flags &= ~SDL_FULLSCREEN;
1753 SDL_PublicSurface->flags &= ~SDL_FULLSCREEN;
1754 }
1755 } else {
1756 toggled = video->ToggleFullScreen(this, 1);
1757 if ( toggled ) {
1758 SDL_VideoSurface->flags |= SDL_FULLSCREEN;
1759 SDL_PublicSurface->flags |= SDL_FULLSCREEN;
1760 }
1761 }
1762 /* Double-check the grab state inside SDL_WM_GrabInput() */
1763 if ( toggled ) {
1764 SDL_WM_GrabInput(video->input_grab);
1765 }
1766 }
1767 return(toggled);
1768 }
1769
1770 /*
1771 * Get some platform dependent window manager information
1772 */
1773 int SDL_GetWMInfo (SDL_SysWMinfo *info)
1774 {
1775 SDL_VideoDevice *video = current_video;
1776 SDL_VideoDevice *this = current_video;
1777
1778 if ( video && video->GetWMInfo ) {
1779 return(video->GetWMInfo(this, info));
1780 } else {
1781 return(0);
1782 }
1783 }