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SDL-1.2.14
[sdl_omap.git] / src / video / ataricommon / SDL_atarigl.c
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e14743d1 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 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@libsdl.org
21*/
22#include "SDL_config.h"
23
24/* Atari OSMesa.ldg implementation of SDL OpenGL support */
25
26/*--- Includes ---*/
27
28#if SDL_VIDEO_OPENGL
29#include <GL/osmesa.h>
30#endif
31
32#include <mint/osbind.h>
33
34#include "SDL_endian.h"
35#include "SDL_video.h"
36#include "SDL_atarigl_c.h"
37#if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC
38#include "SDL_loadso.h"
39#endif
40
41/*--- Defines ---*/
42
43#define PATH_OSMESA_LDG "osmesa.ldg"
44#define PATH_MESAGL_LDG "mesa_gl.ldg"
45#define PATH_TINYGL_LDG "tiny_gl.ldg"
46
47#define VDI_RGB 0xf
48
49/*--- Functions prototypes ---*/
50
51static void SDL_AtariGL_UnloadLibrary(_THIS);
52
53#if SDL_VIDEO_OPENGL
54static void CopyShadowNull(_THIS, SDL_Surface *surface);
55static void CopyShadowDirect(_THIS, SDL_Surface *surface);
56static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface);
57static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface);
58static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface);
59static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface);
60static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface);
61static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface);
62static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface);
63static void CopyShadow8888To555(_THIS, SDL_Surface *surface);
64static void CopyShadow8888To565(_THIS, SDL_Surface *surface);
65
66static void ConvertNull(_THIS, SDL_Surface *surface);
67static void Convert565To555be(_THIS, SDL_Surface *surface);
68static void Convert565To555le(_THIS, SDL_Surface *surface);
69static void Convert565le(_THIS, SDL_Surface *surface);
70static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface);
71
72static int InitNew(_THIS, SDL_Surface *current);
73static int InitOld(_THIS, SDL_Surface *current);
74#endif
75
76/*--- Public functions ---*/
77
78int SDL_AtariGL_Init(_THIS, SDL_Surface *current)
79{
80#if SDL_VIDEO_OPENGL
81 if (gl_oldmesa) {
82 gl_active = InitOld(this, current);
83 } else {
84 gl_active = InitNew(this, current);
85 }
86#endif
87
88 return (gl_active);
89}
90
91void SDL_AtariGL_Quit(_THIS, SDL_bool unload)
92{
93#if SDL_VIDEO_OPENGL
94 if (gl_oldmesa) {
95 /* Old mesa implementations */
96 if (this->gl_data->OSMesaDestroyLDG) {
97 this->gl_data->OSMesaDestroyLDG();
98 }
99 if (gl_shadow) {
100 Mfree(gl_shadow);
101 gl_shadow = NULL;
102 }
103 } else {
104 /* New mesa implementation */
105 if (gl_ctx) {
106 if (this->gl_data->OSMesaDestroyContext) {
107 this->gl_data->OSMesaDestroyContext(gl_ctx);
108 }
109 gl_ctx = NULL;
110 }
111 }
112
113 if (unload) {
114 SDL_AtariGL_UnloadLibrary(this);
115 }
116
117#endif /* SDL_VIDEO_OPENGL */
118 gl_active = 0;
119}
120
121int SDL_AtariGL_LoadLibrary(_THIS, const char *path)
122{
123#if SDL_VIDEO_OPENGL
124
125#if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC
126 void *handle;
127 SDL_bool cancel_load;
128
129 if (gl_active) {
130 SDL_SetError("OpenGL context already created");
131 return -1;
132 }
133
134 /* Unload previous driver */
135 SDL_AtariGL_UnloadLibrary(this);
136
137 /* Load library given by path */
138 handle = SDL_LoadObject(path);
139 if (handle == NULL) {
140 /* Try to load another one */
141 path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
142 if ( path != NULL ) {
143 handle = SDL_LoadObject(path);
144 }
145
146 /* If it does not work, try some other */
147 if (handle == NULL) {
148 path = PATH_OSMESA_LDG;
149 handle = SDL_LoadObject(path);
150 }
151
152 if (handle == NULL) {
153 path = PATH_MESAGL_LDG;
154 handle = SDL_LoadObject(path);
155 }
156
157 if (handle == NULL) {
158 path = PATH_TINYGL_LDG;
159 handle = SDL_LoadObject(path);
160 }
161 }
162
163 if (handle == NULL) {
164 SDL_SetError("Could not load OpenGL library");
165 return -1;
166 }
167
168 this->gl_data->glGetIntegerv = SDL_LoadFunction(handle, "glGetIntegerv");
169 this->gl_data->glFinish = SDL_LoadFunction(handle, "glFinish");
170 this->gl_data->glFlush = SDL_LoadFunction(handle, "glFlush");
171
172 cancel_load = SDL_FALSE;
173 if (this->gl_data->glGetIntegerv == NULL) {
174 cancel_load = SDL_TRUE;
175 } else {
176 /* We need either glFinish (OSMesa) or glFlush (TinyGL) */
177 if ((this->gl_data->glFinish == NULL) &&
178 (this->gl_data->glFlush == NULL)) {
179 cancel_load = SDL_TRUE;
180 }
181 }
182 if (cancel_load) {
183 SDL_SetError("Could not retrieve OpenGL functions");
184 SDL_UnloadObject(handle);
185 /* Restore pointers to static library */
186 SDL_AtariGL_InitPointers(this);
187 return -1;
188 }
189
190 /* Load functions pointers (osmesa.ldg) */
191 this->gl_data->OSMesaCreateContextExt = SDL_LoadFunction(handle, "OSMesaCreateContextExt");
192 this->gl_data->OSMesaDestroyContext = SDL_LoadFunction(handle, "OSMesaDestroyContext");
193 this->gl_data->OSMesaMakeCurrent = SDL_LoadFunction(handle, "OSMesaMakeCurrent");
194 this->gl_data->OSMesaPixelStore = SDL_LoadFunction(handle, "OSMesaPixelStore");
195 this->gl_data->OSMesaGetProcAddress = SDL_LoadFunction(handle, "OSMesaGetProcAddress");
196
197 /* Load old functions pointers (mesa_gl.ldg, tiny_gl.ldg) */
198 this->gl_data->OSMesaCreateLDG = SDL_LoadFunction(handle, "OSMesaCreateLDG");
199 this->gl_data->OSMesaDestroyLDG = SDL_LoadFunction(handle, "OSMesaDestroyLDG");
200
201 gl_oldmesa = 0;
202
203 if ( (this->gl_data->OSMesaCreateContextExt == NULL) ||
204 (this->gl_data->OSMesaDestroyContext == NULL) ||
205 (this->gl_data->OSMesaMakeCurrent == NULL) ||
206 (this->gl_data->OSMesaPixelStore == NULL) ||
207 (this->gl_data->OSMesaGetProcAddress == NULL)) {
208 /* Hum, maybe old library ? */
209 if ( (this->gl_data->OSMesaCreateLDG == NULL) ||
210 (this->gl_data->OSMesaDestroyLDG == NULL)) {
211 SDL_SetError("Could not retrieve OSMesa functions");
212 SDL_UnloadObject(handle);
213 /* Restore pointers to static library */
214 SDL_AtariGL_InitPointers(this);
215 return -1;
216 } else {
217 gl_oldmesa = 1;
218 }
219 }
220
221 this->gl_config.dll_handle = handle;
222 if ( path ) {
223 SDL_strlcpy(this->gl_config.driver_path, path,
224 SDL_arraysize(this->gl_config.driver_path));
225 } else {
226 *this->gl_config.driver_path = '\0';
227 }
228
229#endif
230 this->gl_config.driver_loaded = 1;
231
232 return 0;
233#else
234 return -1;
235#endif
236}
237
238void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc)
239{
240 void *func = NULL;
241#if SDL_VIDEO_OPENGL
242
243 if (this->gl_config.dll_handle) {
244 func = SDL_LoadFunction(this->gl_config.dll_handle, (void *)proc);
245 } else if (this->gl_data->OSMesaGetProcAddress) {
246 func = this->gl_data->OSMesaGetProcAddress(proc);
247 }
248
249#endif
250 return func;
251}
252
253int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
254{
255#if SDL_VIDEO_OPENGL
256 GLenum mesa_attrib;
257 SDL_Surface *surface;
258
259 if (!gl_active) {
260 return -1;
261 }
262
263 switch(attrib) {
264 case SDL_GL_RED_SIZE:
265 mesa_attrib = GL_RED_BITS;
266 break;
267 case SDL_GL_GREEN_SIZE:
268 mesa_attrib = GL_GREEN_BITS;
269 break;
270 case SDL_GL_BLUE_SIZE:
271 mesa_attrib = GL_BLUE_BITS;
272 break;
273 case SDL_GL_ALPHA_SIZE:
274 mesa_attrib = GL_ALPHA_BITS;
275 break;
276 case SDL_GL_DOUBLEBUFFER:
277 surface = this->screen;
278 *value = ((surface->flags & SDL_DOUBLEBUF)==SDL_DOUBLEBUF);
279 return 0;
280 case SDL_GL_DEPTH_SIZE:
281 mesa_attrib = GL_DEPTH_BITS;
282 break;
283 case SDL_GL_STENCIL_SIZE:
284 mesa_attrib = GL_STENCIL_BITS;
285 break;
286 case SDL_GL_ACCUM_RED_SIZE:
287 mesa_attrib = GL_ACCUM_RED_BITS;
288 break;
289 case SDL_GL_ACCUM_GREEN_SIZE:
290 mesa_attrib = GL_ACCUM_GREEN_BITS;
291 break;
292 case SDL_GL_ACCUM_BLUE_SIZE:
293 mesa_attrib = GL_ACCUM_BLUE_BITS;
294 break;
295 case SDL_GL_ACCUM_ALPHA_SIZE:
296 mesa_attrib = GL_ACCUM_ALPHA_BITS;
297 break;
298 default :
299 return -1;
300 }
301
302 this->gl_data->glGetIntegerv(mesa_attrib, value);
303 return 0;
304#else
305 return -1;
306#endif
307}
308
309int SDL_AtariGL_MakeCurrent(_THIS)
310{
311#if SDL_VIDEO_OPENGL
312 SDL_Surface *surface;
313 GLenum type;
314
315 if (gl_oldmesa && gl_active) {
316 return 0;
317 }
318
319 if (this->gl_config.dll_handle) {
320 if ((this->gl_data->OSMesaMakeCurrent == NULL) ||
321 (this->gl_data->OSMesaPixelStore == NULL)) {
322 return -1;
323 }
324 }
325
326 if (!gl_active) {
327 SDL_SetError("Invalid OpenGL context");
328 return -1;
329 }
330
331 surface = this->screen;
332
333 if ((surface->format->BitsPerPixel == 15) || (surface->format->BitsPerPixel == 16)) {
334 type = GL_UNSIGNED_SHORT_5_6_5;
335 } else {
336 type = GL_UNSIGNED_BYTE;
337 }
338
339 if (!(this->gl_data->OSMesaMakeCurrent(gl_ctx, surface->pixels, type, surface->w, surface->h))) {
340 SDL_SetError("Can not make OpenGL context current");
341 return -1;
342 }
343
344 /* OSMesa draws upside down */
345 this->gl_data->OSMesaPixelStore(OSMESA_Y_UP, 0);
346
347 return 0;
348#else
349 return -1;
350#endif
351}
352
353void SDL_AtariGL_SwapBuffers(_THIS)
354{
355#if SDL_VIDEO_OPENGL
356 if (gl_active) {
357 if (this->gl_config.dll_handle) {
358 if (this->gl_data->glFinish) {
359 this->gl_data->glFinish();
360 } else if (this->gl_data->glFlush) {
361 this->gl_data->glFlush();
362 }
363 } else {
364 this->gl_data->glFinish();
365 }
366 gl_copyshadow(this, this->screen);
367 gl_convert(this, this->screen);
368 }
369#endif
370}
371
372void SDL_AtariGL_InitPointers(_THIS)
373{
374#if SDL_VIDEO_OPENGL
375 this->gl_data->OSMesaCreateContextExt = OSMesaCreateContextExt;
376 this->gl_data->OSMesaDestroyContext = OSMesaDestroyContext;
377 this->gl_data->OSMesaMakeCurrent = OSMesaMakeCurrent;
378 this->gl_data->OSMesaPixelStore = OSMesaPixelStore;
379 this->gl_data->OSMesaGetProcAddress = OSMesaGetProcAddress;
380
381 this->gl_data->glGetIntegerv = glGetIntegerv;
382 this->gl_data->glFinish = glFinish;
383 this->gl_data->glFlush = glFlush;
384
385 this->gl_data->OSMesaCreateLDG = NULL;
386 this->gl_data->OSMesaDestroyLDG = NULL;
387#endif
388}
389
390/*--- Private functions ---*/
391
392static void SDL_AtariGL_UnloadLibrary(_THIS)
393{
394#if SDL_VIDEO_OPENGL
395 if (this->gl_config.dll_handle) {
396 SDL_UnloadObject(this->gl_config.dll_handle);
397 this->gl_config.dll_handle = NULL;
398
399 /* Restore pointers to static library */
400 SDL_AtariGL_InitPointers(this);
401 }
402#endif
403}
404
405/*--- Creation of an OpenGL context using new/old functions ---*/
406
407#if SDL_VIDEO_OPENGL
408static int InitNew(_THIS, SDL_Surface *current)
409{
410 GLenum osmesa_format;
411 SDL_PixelFormat *pixel_format;
412 Uint32 redmask;
413 int recreatecontext;
414 GLint newaccumsize;
415
416 if (this->gl_config.dll_handle) {
417 if (this->gl_data->OSMesaCreateContextExt == NULL) {
418 return 0;
419 }
420 }
421
422 /* Init OpenGL context using OSMesa */
423 gl_convert = ConvertNull;
424 gl_copyshadow = CopyShadowNull;
425 gl_upsidedown = SDL_FALSE;
426
427 pixel_format = current->format;
428 redmask = pixel_format->Rmask;
429 switch (pixel_format->BitsPerPixel) {
430 case 15:
431 /* 1555, big and little endian, unsupported */
432 gl_pixelsize = 2;
433 osmesa_format = OSMESA_RGB_565;
434 if (redmask == 31<<10) {
435 gl_convert = Convert565To555be;
436 } else {
437 gl_convert = Convert565To555le;
438 }
439 break;
440 case 16:
441 gl_pixelsize = 2;
442 if (redmask == 31<<11) {
443 osmesa_format = OSMESA_RGB_565;
444 } else {
445 /* 565, little endian, unsupported */
446 osmesa_format = OSMESA_RGB_565;
447 gl_convert = Convert565le;
448 }
449 break;
450 case 24:
451 gl_pixelsize = 3;
452 if (redmask == 255<<16) {
453 osmesa_format = OSMESA_RGB;
454 } else {
455 osmesa_format = OSMESA_BGR;
456 }
457 break;
458 case 32:
459 gl_pixelsize = 4;
460 if (redmask == 255<<16) {
461 osmesa_format = OSMESA_ARGB;
462 } else if (redmask == 255<<8) {
463 osmesa_format = OSMESA_BGRA;
464 } else if (redmask == 255<<24) {
465 osmesa_format = OSMESA_RGBA;
466 } else {
467 /* ABGR format unsupported */
468 osmesa_format = OSMESA_BGRA;
469 gl_convert = ConvertBGRAToABGR;
470 }
471 break;
472 default:
473 gl_pixelsize = 1;
474 osmesa_format = OSMESA_COLOR_INDEX;
475 break;
476 }
477
478 /* Try to keep current context if possible */
479 newaccumsize =
480 this->gl_config.accum_red_size +
481 this->gl_config.accum_green_size +
482 this->gl_config.accum_blue_size +
483 this->gl_config.accum_alpha_size;
484 recreatecontext=1;
485 if (gl_ctx &&
486 (gl_curformat == osmesa_format) &&
487 (gl_curdepth == this->gl_config.depth_size) &&
488 (gl_curstencil == this->gl_config.stencil_size) &&
489 (gl_curaccum == newaccumsize)) {
490 recreatecontext = 0;
491 }
492 if (recreatecontext) {
493 SDL_AtariGL_Quit(this, SDL_FALSE);
494
495 gl_ctx = this->gl_data->OSMesaCreateContextExt(
496 osmesa_format, this->gl_config.depth_size,
497 this->gl_config.stencil_size, newaccumsize, NULL );
498
499 if (gl_ctx) {
500 gl_curformat = osmesa_format;
501 gl_curdepth = this->gl_config.depth_size;
502 gl_curstencil = this->gl_config.stencil_size;
503 gl_curaccum = newaccumsize;
504 } else {
505 gl_curformat = 0;
506 gl_curdepth = 0;
507 gl_curstencil = 0;
508 gl_curaccum = 0;
509 }
510 }
511
512 return (gl_ctx != NULL);
513}
514
515
516static int InitOld(_THIS, SDL_Surface *current)
517{
518 GLenum osmesa_format;
519 SDL_PixelFormat *pixel_format;
520 Uint32 redmask;
521 int recreatecontext, tinygl_present;
522
523 if (this->gl_config.dll_handle) {
524 if (this->gl_data->OSMesaCreateLDG == NULL) {
525 return 0;
526 }
527 }
528
529 /* TinyGL only supports VDI_RGB (OSMESA_RGB) */
530 tinygl_present=0;
531 if (this->gl_config.dll_handle) {
532 if (this->gl_data->glFinish == NULL) {
533 tinygl_present=1;
534 }
535 }
536
537 /* Init OpenGL context using OSMesa */
538 gl_convert = ConvertNull;
539 gl_copyshadow = CopyShadowNull;
540 gl_upsidedown = SDL_FALSE;
541
542 pixel_format = current->format;
543 redmask = pixel_format->Rmask;
544 switch (pixel_format->BitsPerPixel) {
545 case 15:
546 /* 15 bits unsupported */
547 if (tinygl_present) {
548 gl_pixelsize = 3;
549 osmesa_format = VDI_RGB;
550 if (redmask == 31<<10) {
551 gl_copyshadow = CopyShadowRGBTo555;
552 } else {
553 gl_copyshadow = CopyShadowRGBTo565;
554 gl_convert = Convert565To555le;
555 }
556 } else {
557 gl_pixelsize = 4;
558 gl_upsidedown = SDL_TRUE;
559 osmesa_format = OSMESA_ARGB;
560 if (redmask == 31<<10) {
561 gl_copyshadow = CopyShadow8888To555;
562 } else {
563 gl_copyshadow = CopyShadow8888To565;
564 gl_convert = Convert565To555le;
565 }
566 }
567 break;
568 case 16:
569 /* 16 bits unsupported */
570 if (tinygl_present) {
571 gl_pixelsize = 3;
572 osmesa_format = VDI_RGB;
573 gl_copyshadow = CopyShadowRGBTo565;
574 if (redmask != 31<<11) {
575 /* 565, little endian, unsupported */
576 gl_convert = Convert565le;
577 }
578 } else {
579 gl_pixelsize = 4;
580 gl_upsidedown = SDL_TRUE;
581 osmesa_format = OSMESA_ARGB;
582 gl_copyshadow = CopyShadow8888To565;
583 if (redmask != 31<<11) {
584 /* 565, little endian, unsupported */
585 gl_convert = Convert565le;
586 }
587 }
588 break;
589 case 24:
590 gl_pixelsize = 3;
591 if (tinygl_present) {
592 osmesa_format = VDI_RGB;
593 gl_copyshadow = CopyShadowDirect;
594 if (redmask != 255<<16) {
595 gl_copyshadow = CopyShadowRGBSwap;
596 }
597 } else {
598 gl_copyshadow = CopyShadowDirect;
599 gl_upsidedown = SDL_TRUE;
600 if (redmask == 255<<16) {
601 osmesa_format = OSMESA_RGB;
602 } else {
603 osmesa_format = OSMESA_BGR;
604 }
605 }
606 break;
607 case 32:
608 if (tinygl_present) {
609 gl_pixelsize = 3;
610 osmesa_format = VDI_RGB;
611 gl_copyshadow = CopyShadowRGBToARGB;
612 if (redmask == 255) {
613 gl_convert = CopyShadowRGBToABGR;
614 } else if (redmask == 255<<8) {
615 gl_convert = CopyShadowRGBToBGRA;
616 } else if (redmask == 255<<24) {
617 gl_convert = CopyShadowRGBToRGBA;
618 }
619 } else {
620 gl_pixelsize = 4;
621 gl_upsidedown = SDL_TRUE;
622 gl_copyshadow = CopyShadowDirect;
623 if (redmask == 255<<16) {
624 osmesa_format = OSMESA_ARGB;
625 } else if (redmask == 255<<8) {
626 osmesa_format = OSMESA_BGRA;
627 } else if (redmask == 255<<24) {
628 osmesa_format = OSMESA_RGBA;
629 } else {
630 /* ABGR format unsupported */
631 osmesa_format = OSMESA_BGRA;
632 gl_convert = ConvertBGRAToABGR;
633 }
634 }
635 break;
636 default:
637 if (tinygl_present) {
638 SDL_AtariGL_Quit(this, SDL_FALSE);
639 return 0;
640 }
641 gl_pixelsize = 1;
642 gl_copyshadow = CopyShadowDirect;
643 osmesa_format = OSMESA_COLOR_INDEX;
644 break;
645 }
646
647 /* Try to keep current context if possible */
648 recreatecontext=1;
649 if (gl_shadow &&
650 (gl_curformat == osmesa_format) &&
651 (gl_curwidth == current->w) &&
652 (gl_curheight == current->h)) {
653 recreatecontext = 0;
654 }
655 if (recreatecontext) {
656 SDL_AtariGL_Quit(this, SDL_FALSE);
657
658 gl_shadow = this->gl_data->OSMesaCreateLDG(
659 osmesa_format, GL_UNSIGNED_BYTE, current->w, current->h
660 );
661
662 if (gl_shadow) {
663 gl_curformat = osmesa_format;
664 gl_curwidth = current->w;
665 gl_curheight = current->h;
666 } else {
667 gl_curformat = 0;
668 gl_curwidth = 0;
669 gl_curheight = 0;
670 }
671 }
672
673 return (gl_shadow != NULL);
674}
675
676/*--- Conversions routines from shadow buffer to the screen ---*/
677
678static void CopyShadowNull(_THIS, SDL_Surface *surface)
679{
680}
681
682static void CopyShadowDirect(_THIS, SDL_Surface *surface)
683{
684 int y, srcpitch, dstpitch;
685 Uint8 *srcline, *dstline;
686
687 srcline = gl_shadow;
688 srcpitch = surface->w * gl_pixelsize;
689 dstline = surface->pixels;
690 dstpitch = surface->pitch;
691 if (gl_upsidedown) {
692 srcline += (surface->h-1)*srcpitch;
693 srcpitch = -srcpitch;
694 }
695
696 for (y=0; y<surface->h; y++) {
697 SDL_memcpy(dstline, srcline, srcpitch);
698
699 srcline += srcpitch;
700 dstline += dstpitch;
701 }
702}
703
704static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface)
705{
706 int x,y, srcpitch, dstpitch;
707 Uint16 *dstline, *dstcol;
708 Uint8 *srcline, *srccol;
709
710 srcline = (Uint8 *)gl_shadow;
711 srcpitch = surface->w * gl_pixelsize;
712 dstline = surface->pixels;
713 dstpitch = surface->pitch >>1;
714 if (gl_upsidedown) {
715 srcline += (surface->h-1)*srcpitch;
716 srcpitch = -srcpitch;
717 }
718
719 for (y=0; y<surface->h; y++) {
720 srccol = srcline;
721 dstcol = dstline;
722 for (x=0; x<surface->w; x++) {
723 Uint16 dstcolor;
724
725 dstcolor = ((*srccol++)<<7) & (31<<10);
726 dstcolor |= ((*srccol++)<<2) & (31<<5);
727 dstcolor |= ((*srccol++)>>3) & 31;
728 *dstcol++ = dstcolor;
729 }
730
731 srcline += srcpitch;
732 dstline += dstpitch;
733 }
734}
735
736static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface)
737{
738 int x,y, srcpitch, dstpitch;
739 Uint16 *dstline, *dstcol;
740 Uint8 *srcline, *srccol;
741
742 srcline = (Uint8 *)gl_shadow;
743 srcpitch = surface->w * gl_pixelsize;
744 dstline = surface->pixels;
745 dstpitch = surface->pitch >>1;
746 if (gl_upsidedown) {
747 srcline += (surface->h-1)*srcpitch;
748 srcpitch = -srcpitch;
749 }
750
751 for (y=0; y<surface->h; y++) {
752 srccol = srcline;
753 dstcol = dstline;
754
755 for (x=0; x<surface->w; x++) {
756 Uint16 dstcolor;
757
758 dstcolor = ((*srccol++)<<8) & (31<<11);
759 dstcolor |= ((*srccol++)<<3) & (63<<5);
760 dstcolor |= ((*srccol++)>>3) & 31;
761 *dstcol++ = dstcolor;
762 }
763
764 srcline += srcpitch;
765 dstline += dstpitch;
766 }
767}
768
769static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface)
770{
771 int x,y, srcpitch, dstpitch;
772 Uint8 *dstline, *dstcol;
773 Uint8 *srcline, *srccol;
774
775 srcline = (Uint8 *)gl_shadow;
776 srcpitch = surface->w * gl_pixelsize;
777 dstline = surface->pixels;
778 dstpitch = surface->pitch;
779 if (gl_upsidedown) {
780 srcline += (surface->h-1)*srcpitch;
781 srcpitch = -srcpitch;
782 }
783
784 for (y=0; y<surface->h; y++) {
785 srccol = srcline;
786 dstcol = dstline;
787
788 for (x=0; x<surface->w; x++) {
789 *dstcol++ = srccol[2];
790 *dstcol++ = srccol[1];
791 *dstcol++ = srccol[0];
792 srccol += 3;
793 }
794
795 srcline += srcpitch;
796 dstline += dstpitch;
797 }
798}
799
800static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface)
801{
802 int x,y, srcpitch, dstpitch;
803 Uint32 *dstline, *dstcol;
804 Uint8 *srcline, *srccol;
805
806 srcline = (Uint8 *)gl_shadow;
807 srcpitch = surface->w * gl_pixelsize;
808 dstline = surface->pixels;
809 dstpitch = surface->pitch >>2;
810 if (gl_upsidedown) {
811 srcline += (surface->h-1)*srcpitch;
812 srcpitch = -srcpitch;
813 }
814
815 for (y=0; y<surface->h; y++) {
816 srccol = srcline;
817 dstcol = dstline;
818
819 for (x=0; x<surface->w; x++) {
820 Uint32 dstcolor;
821
822 dstcolor = (*srccol++)<<16;
823 dstcolor |= (*srccol++)<<8;
824 dstcolor |= *srccol++;
825
826 *dstcol++ = dstcolor;
827 }
828
829 srcline += srcpitch;
830 dstline += dstpitch;
831 }
832}
833
834static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface)
835{
836 int x,y, srcpitch, dstpitch;
837 Uint32 *dstline, *dstcol;
838 Uint8 *srcline, *srccol;
839
840 srcline = (Uint8 *)gl_shadow;
841 srcpitch = surface->w * gl_pixelsize;
842 dstline = surface->pixels;
843 dstpitch = surface->pitch >>2;
844 if (gl_upsidedown) {
845 srcline += (surface->h-1)*srcpitch;
846 srcpitch = -srcpitch;
847 }
848
849 for (y=0; y<surface->h; y++) {
850 srccol = srcline;
851 dstcol = dstline;
852
853 for (x=0; x<surface->w; x++) {
854 Uint32 dstcolor;
855
856 dstcolor = *srccol++;
857 dstcolor |= (*srccol++)<<8;
858 dstcolor |= (*srccol++)<<16;
859
860 *dstcol++ = dstcolor;
861 }
862
863 srcline += srcpitch;
864 dstline += dstpitch;
865 }
866}
867
868static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface)
869{
870 int x,y, srcpitch, dstpitch;
871 Uint32 *dstline, *dstcol;
872 Uint8 *srcline, *srccol;
873
874 srcline = (Uint8 *)gl_shadow;
875 srcpitch = surface->w * gl_pixelsize;
876 dstline = surface->pixels;
877 dstpitch = surface->pitch >>2;
878 if (gl_upsidedown) {
879 srcline += (surface->h-1)*srcpitch;
880 srcpitch = -srcpitch;
881 }
882
883 for (y=0; y<surface->h; y++) {
884 srccol = srcline;
885 dstcol = dstline;
886
887 for (x=0; x<surface->w; x++) {
888 Uint32 dstcolor;
889
890 dstcolor = (*srccol++)<<8;
891 dstcolor |= (*srccol++)<<16;
892 dstcolor |= (*srccol++)<<24;
893
894 *dstcol++ = dstcolor;
895 }
896
897 srcline += srcpitch;
898 dstline += dstpitch;
899 }
900}
901
902static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface)
903{
904 int x,y, srcpitch, dstpitch;
905 Uint32 *dstline, *dstcol;
906 Uint8 *srcline, *srccol;
907
908 srcline = (Uint8 *)gl_shadow;
909 srcpitch = surface->w * gl_pixelsize;
910 dstline = surface->pixels;
911 dstpitch = surface->pitch >>2;
912 if (gl_upsidedown) {
913 srcline += (surface->h-1)*srcpitch;
914 srcpitch = -srcpitch;
915 }
916
917 for (y=0; y<surface->h; y++) {
918 srccol = srcline;
919 dstcol = dstline;
920
921 for (x=0; x<surface->w; x++) {
922 Uint32 dstcolor;
923
924 dstcolor = (*srccol++)<<24;
925 dstcolor |= (*srccol++)<<16;
926 dstcolor |= (*srccol++)<<8;
927
928 *dstcol++ = dstcolor;
929 }
930
931 srcline += srcpitch;
932 dstline += dstpitch;
933 }
934}
935
936static void CopyShadow8888To555(_THIS, SDL_Surface *surface)
937{
938 int x,y, srcpitch, dstpitch;
939 Uint16 *dstline, *dstcol;
940 Uint32 *srcline, *srccol;
941
942 srcline = (Uint32 *)gl_shadow;
943 srcpitch = (surface->w * gl_pixelsize) >>2;
944 dstline = surface->pixels;
945 dstpitch = surface->pitch >>1;
946 if (gl_upsidedown) {
947 srcline += (surface->h-1)*srcpitch;
948 srcpitch = -srcpitch;
949 }
950
951 for (y=0; y<surface->h; y++) {
952 srccol = srcline;
953 dstcol = dstline;
954 for (x=0; x<surface->w; x++) {
955 Uint32 srccolor;
956 Uint16 dstcolor;
957
958 srccolor = *srccol++;
959 dstcolor = (srccolor>>9) & (31<<10);
960 dstcolor |= (srccolor>>6) & (31<<5);
961 dstcolor |= (srccolor>>3) & 31;
962 *dstcol++ = dstcolor;
963 }
964
965 srcline += srcpitch;
966 dstline += dstpitch;
967 }
968}
969
970static void CopyShadow8888To565(_THIS, SDL_Surface *surface)
971{
972 int x,y, srcpitch, dstpitch;
973 Uint16 *dstline, *dstcol;
974 Uint32 *srcline, *srccol;
975
976 srcline = (Uint32 *)gl_shadow;
977 srcpitch = (surface->w * gl_pixelsize) >> 2;
978 dstline = surface->pixels;
979 dstpitch = surface->pitch >>1;
980 if (gl_upsidedown) {
981 srcline += (surface->h-1)*srcpitch;
982 srcpitch = -srcpitch;
983 }
984
985 for (y=0; y<surface->h; y++) {
986 srccol = srcline;
987 dstcol = dstline;
988
989 for (x=0; x<surface->w; x++) {
990 Uint32 srccolor;
991 Uint16 dstcolor;
992
993 srccolor = *srccol++;
994 dstcolor = (srccolor>>8) & (31<<11);
995 dstcolor |= (srccolor>>5) & (63<<5);
996 dstcolor |= (srccolor>>3) & 31;
997 *dstcol++ = dstcolor;
998 }
999
1000 srcline += srcpitch;
1001 dstline += dstpitch;
1002 }
1003}
1004
1005/*--- Conversions routines in the screen ---*/
1006
1007static void ConvertNull(_THIS, SDL_Surface *surface)
1008{
1009}
1010
1011static void Convert565To555be(_THIS, SDL_Surface *surface)
1012{
1013 int x,y, pitch;
1014 unsigned short *line, *pixel;
1015
1016 line = surface->pixels;
1017 pitch = surface->pitch >> 1;
1018 for (y=0; y<surface->h; y++) {
1019 pixel = line;
1020 for (x=0; x<surface->w; x++) {
1021 unsigned short color = *pixel;
1022
1023 *pixel++ = (color & 0x1f)|((color>>1) & 0xffe0);
1024 }
1025
1026 line += pitch;
1027 }
1028}
1029
1030static void Convert565To555le(_THIS, SDL_Surface *surface)
1031{
1032 int x,y, pitch;
1033 unsigned short *line, *pixel;
1034
1035 line = surface->pixels;
1036 pitch = surface->pitch >>1;
1037 for (y=0; y<surface->h; y++) {
1038 pixel = line;
1039 for (x=0; x<surface->w; x++) {
1040 unsigned short color = *pixel;
1041
1042 color = (color & 0x1f)|((color>>1) & 0xffe0);
1043 *pixel++ = SDL_Swap16(color);
1044 }
1045
1046 line += pitch;
1047 }
1048}
1049
1050static void Convert565le(_THIS, SDL_Surface *surface)
1051{
1052 int x,y, pitch;
1053 unsigned short *line, *pixel;
1054
1055 line = surface->pixels;
1056 pitch = surface->pitch >>1;
1057 for (y=0; y<surface->h; y++) {
1058 pixel = line;
1059 for (x=0; x<surface->w; x++) {
1060 unsigned short color = *pixel;
1061
1062 *pixel++ = SDL_Swap16(color);
1063 }
1064
1065 line += pitch;
1066 }
1067}
1068
1069static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface)
1070{
1071 int x,y, pitch;
1072 unsigned long *line, *pixel;
1073
1074 line = surface->pixels;
1075 pitch = surface->pitch >>2;
1076 for (y=0; y<surface->h; y++) {
1077 pixel = line;
1078 for (x=0; x<surface->w; x++) {
1079 unsigned long color = *pixel;
1080
1081 *pixel++ = (color<<24)|(color>>8);
1082 }
1083
1084 line += pitch;
1085 }
1086}
1087
1088#endif /* SDL_VIDEO_OPENGL */
SDL with some OMAP hardware support