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comparison src/render/opengles/SDL_render_gles.c @ 5198:bb45ecd958d8

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Renamed files for consistency
author Sam Lantinga <slouken@libsdl.org>
date Sat, 05 Feb 2011 12:01:11 -0800
parents src/render/opengles/SDL_renderer_gles.c@d976b67150c5
children 523409574510
comparison
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5197:69f47f2c1856 5198:bb45ecd958d8
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2010 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 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 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 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 #if SDL_VIDEO_RENDER_OGL_ES
25
26 #include "SDL_opengles.h"
27 #include "../SDL_sysrender.h"
28
29 #if defined(SDL_VIDEO_DRIVER_PANDORA)
30
31 /* Empty function stub to get OpenGL ES 1.x support without */
32 /* OpenGL ES extension GL_OES_draw_texture supported */
33 GL_API void GL_APIENTRY
34 glDrawTexiOES(GLint x, GLint y, GLint z, GLint width, GLint height)
35 {
36 return;
37 }
38
39 #endif /* PANDORA */
40
41 /* OpenGL ES 1.1 renderer implementation, based on the OpenGL renderer */
42
43 /* Used to re-create the window with OpenGL capability */
44 extern int SDL_RecreateWindow(SDL_Window * window, Uint32 flags);
45
46 static const float inv255f = 1.0f / 255.0f;
47
48 static SDL_Renderer *GLES_CreateRenderer(SDL_Window * window, Uint32 flags);
49 static void GLES_WindowEvent(SDL_Renderer * renderer,
50 const SDL_WindowEvent *event);
51 static int GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
52 static int GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
53 const SDL_Rect * rect, const void *pixels,
54 int pitch);
55 static int GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
56 const SDL_Rect * rect, void **pixels, int *pitch);
57 static void GLES_UnlockTexture(SDL_Renderer * renderer,
58 SDL_Texture * texture);
59 static int GLES_RenderDrawPoints(SDL_Renderer * renderer,
60 const SDL_Point * points, int count);
61 static int GLES_RenderDrawLines(SDL_Renderer * renderer,
62 const SDL_Point * points, int count);
63 static int GLES_RenderFillRects(SDL_Renderer * renderer,
64 const SDL_Rect ** rects, int count);
65 static int GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
66 const SDL_Rect * srcrect,
67 const SDL_Rect * dstrect);
68 static void GLES_RenderPresent(SDL_Renderer * renderer);
69 static void GLES_DestroyTexture(SDL_Renderer * renderer,
70 SDL_Texture * texture);
71 static void GLES_DestroyRenderer(SDL_Renderer * renderer);
72
73
74 SDL_RenderDriver GL_ES_RenderDriver = {
75 GLES_CreateRenderer,
76 {
77 "opengl_es",
78 (SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
79 1,
80 {SDL_PIXELFORMAT_ABGR8888},
81 0,
82 0}
83 };
84
85 typedef struct
86 {
87 SDL_GLContext context;
88 SDL_bool updateSize;
89 int blendMode;
90
91 #ifndef APIENTRY
92 #define APIENTRY
93 #endif
94
95 SDL_bool useDrawTexture;
96 SDL_bool GL_OES_draw_texture_supported;
97
98 /* OpenGL ES functions */
99 #define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
100 #include "../../video/SDL_glesfuncs.h"
101 #undef SDL_PROC
102
103 } GLES_RenderData;
104
105 typedef struct
106 {
107 GLuint texture;
108 GLenum type;
109 GLfloat texw;
110 GLfloat texh;
111 GLenum format;
112 GLenum formattype;
113 void *pixels;
114 int pitch;
115 } GLES_TextureData;
116
117 static void
118 GLES_SetError(const char *prefix, GLenum result)
119 {
120 const char *error;
121
122 switch (result) {
123 case GL_NO_ERROR:
124 error = "GL_NO_ERROR";
125 break;
126 case GL_INVALID_ENUM:
127 error = "GL_INVALID_ENUM";
128 break;
129 case GL_INVALID_VALUE:
130 error = "GL_INVALID_VALUE";
131 break;
132 case GL_INVALID_OPERATION:
133 error = "GL_INVALID_OPERATION";
134 break;
135 case GL_STACK_OVERFLOW:
136 error = "GL_STACK_OVERFLOW";
137 break;
138 case GL_STACK_UNDERFLOW:
139 error = "GL_STACK_UNDERFLOW";
140 break;
141 case GL_OUT_OF_MEMORY:
142 error = "GL_OUT_OF_MEMORY";
143 break;
144 default:
145 error = "UNKNOWN";
146 break;
147 }
148 SDL_SetError("%s: %s", prefix, error);
149 }
150
151 static int
152 GLES_LoadFunctions(GLES_RenderData * data)
153 {
154
155 #define SDL_PROC(ret,func,params) \
156 data->func = func;
157 #include "../../video/SDL_glesfuncs.h"
158 #undef SDL_PROC
159
160 return 0;
161 }
162
163 SDL_Renderer *
164 GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
165 {
166
167 SDL_Renderer *renderer;
168 GLES_RenderData *data;
169 GLint value;
170 Uint32 window_flags;
171
172 window_flags = SDL_GetWindowFlags(window);
173 if (!(window_flags & SDL_WINDOW_OPENGL)) {
174 if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
175 return NULL;
176 }
177 }
178
179 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
180 if (!renderer) {
181 SDL_OutOfMemory();
182 return NULL;
183 }
184
185 data = (GLES_RenderData *) SDL_calloc(1, sizeof(*data));
186 if (!data) {
187 GLES_DestroyRenderer(renderer);
188 SDL_OutOfMemory();
189 return NULL;
190 }
191
192 renderer->WindowEvent = GLES_WindowEvent;
193 renderer->CreateTexture = GLES_CreateTexture;
194 renderer->UpdateTexture = GLES_UpdateTexture;
195 renderer->LockTexture = GLES_LockTexture;
196 renderer->UnlockTexture = GLES_UnlockTexture;
197 renderer->RenderDrawPoints = GLES_RenderDrawPoints;
198 renderer->RenderDrawLines = GLES_RenderDrawLines;
199 renderer->RenderFillRects = GLES_RenderFillRects;
200 renderer->RenderCopy = GLES_RenderCopy;
201 renderer->RenderPresent = GLES_RenderPresent;
202 renderer->DestroyTexture = GLES_DestroyTexture;
203 renderer->DestroyRenderer = GLES_DestroyRenderer;
204 renderer->info = GL_ES_RenderDriver.info;
205 renderer->driverdata = data;
206
207 renderer->info.flags = SDL_RENDERER_ACCELERATED;
208
209 if (GLES_LoadFunctions(data) < 0) {
210 GLES_DestroyRenderer(renderer);
211 return NULL;
212 }
213
214 data->context = SDL_GL_CreateContext(window);
215 if (!data->context) {
216 GLES_DestroyRenderer(renderer);
217 return NULL;
218 }
219 if (SDL_GL_MakeCurrent(window, data->context) < 0) {
220 GLES_DestroyRenderer(renderer);
221 return NULL;
222 }
223
224 if (flags & SDL_RENDERER_PRESENTVSYNC) {
225 SDL_GL_SetSwapInterval(1);
226 } else {
227 SDL_GL_SetSwapInterval(0);
228 }
229 if (SDL_GL_GetSwapInterval() > 0) {
230 renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
231 }
232
233 #if SDL_VIDEO_DRIVER_PANDORA
234 data->GL_OES_draw_texture_supported = SDL_FALSE;
235 data->useDrawTexture = SDL_FALSE;
236 #else
237 if (SDL_GL_ExtensionSupported("GL_OES_draw_texture")) {
238 data->GL_OES_draw_texture_supported = SDL_TRUE;
239 data->useDrawTexture = SDL_TRUE;
240 } else {
241 data->GL_OES_draw_texture_supported = SDL_FALSE;
242 data->useDrawTexture = SDL_FALSE;
243 }
244 #endif
245
246 data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
247 renderer->info.max_texture_width = value;
248 data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
249 renderer->info.max_texture_height = value;
250
251 /* Set up parameters for rendering */
252 data->blendMode = -1;
253 data->glDisable(GL_DEPTH_TEST);
254 data->glDisable(GL_CULL_FACE);
255 data->updateSize = SDL_TRUE;
256
257 data->glEnableClientState(GL_VERTEX_ARRAY);
258 data->glEnableClientState(GL_TEXTURE_COORD_ARRAY);
259
260 return renderer;
261 }
262
263 static SDL_GLContext SDL_CurrentContext = NULL;
264
265 static int
266 GLES_ActivateRenderer(SDL_Renderer * renderer)
267 {
268
269 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
270 SDL_Window *window = renderer->window;
271
272 if (SDL_CurrentContext != data->context) {
273 if (SDL_GL_MakeCurrent(window, data->context) < 0) {
274 return -1;
275 }
276 SDL_CurrentContext = data->context;
277 }
278 if (data->updateSize) {
279 int w, h;
280
281 SDL_GetWindowSize(window, &w, &h);
282 data->glMatrixMode(GL_PROJECTION);
283 data->glLoadIdentity();
284 data->glMatrixMode(GL_MODELVIEW);
285 data->glLoadIdentity();
286 data->glViewport(0, 0, w, h);
287 data->glOrthof(0.0, (GLfloat) w, (GLfloat) h, 0.0, 0.0, 1.0);
288 data->updateSize = SDL_FALSE;
289 }
290 return 0;
291 }
292
293 static void
294 GLES_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
295 {
296 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
297
298 if (event->event == SDL_WINDOWEVENT_RESIZED) {
299 /* Rebind the context to the window area and update matrices */
300 SDL_CurrentContext = NULL;
301 data->updateSize = SDL_TRUE;
302 }
303 }
304
305 static __inline__ int
306 power_of_2(int input)
307 {
308 int value = 1;
309
310 while (value < input) {
311 value <<= 1;
312 }
313 return value;
314 }
315
316 static int
317 GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
318 {
319 GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
320 GLES_TextureData *data;
321 GLint internalFormat;
322 GLenum format, type;
323 int texture_w, texture_h;
324 GLenum result;
325
326 GLES_ActivateRenderer(renderer);
327
328 switch (texture->format) {
329 case SDL_PIXELFORMAT_ABGR8888:
330 internalFormat = GL_RGBA;
331 format = GL_RGBA;
332 type = GL_UNSIGNED_BYTE;
333 break;
334 default:
335 SDL_SetError("Texture format %s not supported by OpenGL ES",
336 SDL_GetPixelFormatName(texture->format));
337 return -1;
338 }
339
340 data = (GLES_TextureData *) SDL_calloc(1, sizeof(*data));
341 if (!data) {
342 SDL_OutOfMemory();
343 return -1;
344 }
345
346 if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
347 data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
348 data->pixels = SDL_malloc(texture->h * data->pitch);
349 if (!data->pixels) {
350 SDL_OutOfMemory();
351 SDL_free(data);
352 return -1;
353 }
354 }
355
356 texture->driverdata = data;
357
358 renderdata->glGetError();
359 renderdata->glEnable(GL_TEXTURE_2D);
360 renderdata->glGenTextures(1, &data->texture);
361
362 data->type = GL_TEXTURE_2D;
363 /* no NPOV textures allowed in OpenGL ES (yet) */
364 texture_w = power_of_2(texture->w);
365 texture_h = power_of_2(texture->h);
366 data->texw = (GLfloat) texture->w / texture_w;
367 data->texh = (GLfloat) texture->h / texture_h;
368
369 data->format = format;
370 data->formattype = type;
371 renderdata->glBindTexture(data->type, data->texture);
372 renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
373 GL_LINEAR);
374 renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
375 GL_LINEAR);
376 renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
377 GL_CLAMP_TO_EDGE);
378 renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
379 GL_CLAMP_TO_EDGE);
380
381 renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
382 texture_h, 0, format, type, NULL);
383 renderdata->glDisable(GL_TEXTURE_2D);
384
385 result = renderdata->glGetError();
386 if (result != GL_NO_ERROR) {
387 GLES_SetError("glTexImage2D()", result);
388 return -1;
389 }
390 return 0;
391 }
392
393 static void
394 SetupTextureUpdate(GLES_RenderData * renderdata, SDL_Texture * texture,
395 int pitch)
396 {
397 renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
398 }
399
400 static int
401 GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
402 const SDL_Rect * rect, const void *pixels, int pitch)
403 {
404 GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
405 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
406 GLenum result;
407 int bpp = SDL_BYTESPERPIXEL(texture->format);
408 void * temp_buffer;
409 void * temp_ptr;
410 int i;
411
412 GLES_ActivateRenderer(renderer);
413
414 renderdata->glGetError();
415 SetupTextureUpdate(renderdata, texture, pitch);
416 renderdata->glEnable(data->type);
417 renderdata->glBindTexture(data->type, data->texture);
418
419 if( rect->w * bpp == pitch ) {
420 temp_buffer = (void *)pixels; /* No need to reformat */
421 } else {
422 /* Reformatting of mem area required */
423 temp_buffer = SDL_malloc(rect->w * rect->h * bpp);
424 temp_ptr = temp_buffer;
425 for (i = 0; i < rect->h; i++) {
426 SDL_memcpy(temp_ptr, pixels, rect->w * bpp);
427 temp_ptr += rect->w * bpp;
428 pixels += pitch;
429 }
430 }
431
432 renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
433 rect->h, data->format, data->formattype,
434 temp_buffer);
435
436 if( temp_buffer != pixels ) {
437 SDL_free(temp_buffer);
438 }
439
440 renderdata->glDisable(data->type);
441 result = renderdata->glGetError();
442 if (result != GL_NO_ERROR) {
443 GLES_SetError("glTexSubImage2D()", result);
444 return -1;
445 }
446 return 0;
447 }
448
449 static int
450 GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
451 const SDL_Rect * rect, void **pixels, int *pitch)
452 {
453 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
454
455 *pixels =
456 (void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
457 rect->x * SDL_BYTESPERPIXEL(texture->format));
458 *pitch = data->pitch;
459 return 0;
460 }
461
462 static void
463 GLES_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
464 {
465 GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
466 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
467
468 GLES_ActivateRenderer(renderer);
469
470 SetupTextureUpdate(renderdata, texture, data->pitch);
471 renderdata->glEnable(data->type);
472 renderdata->glBindTexture(data->type, data->texture);
473 renderdata->glTexSubImage2D(data->type, 0, 0, 0, texture->w,
474 texture->h, data->format, data->formattype,
475 data->pixels);
476 renderdata->glDisable(data->type);
477 }
478
479 static void
480 GLES_SetBlendMode(GLES_RenderData * data, int blendMode)
481 {
482 if (blendMode != data->blendMode) {
483 switch (blendMode) {
484 case SDL_BLENDMODE_NONE:
485 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
486 data->glDisable(GL_BLEND);
487 break;
488 case SDL_BLENDMODE_BLEND:
489 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
490 data->glEnable(GL_BLEND);
491 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
492 break;
493 case SDL_BLENDMODE_ADD:
494 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
495 data->glEnable(GL_BLEND);
496 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE);
497 break;
498 case SDL_BLENDMODE_MOD:
499 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
500 data->glEnable(GL_BLEND);
501 data->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
502 break;
503 }
504 data->blendMode = blendMode;
505 }
506 }
507
508 static int
509 GLES_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
510 int count)
511 {
512 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
513 int i;
514 GLshort *vertices;
515
516 GLES_ActivateRenderer(renderer);
517
518 GLES_SetBlendMode(data, renderer->blendMode);
519
520 data->glColor4f((GLfloat) renderer->r * inv255f,
521 (GLfloat) renderer->g * inv255f,
522 (GLfloat) renderer->b * inv255f,
523 (GLfloat) renderer->a * inv255f);
524
525 vertices = SDL_stack_alloc(GLshort, count*2);
526 for (i = 0; i < count; ++i) {
527 vertices[2*i+0] = (GLshort)points[i].x;
528 vertices[2*i+1] = (GLshort)points[i].y;
529 }
530 data->glVertexPointer(2, GL_SHORT, 0, vertices);
531 data->glDrawArrays(GL_POINTS, 0, count);
532 SDL_stack_free(vertices);
533
534 return 0;
535 }
536
537 static int
538 GLES_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
539 int count)
540 {
541 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
542 int i;
543 GLshort *vertices;
544
545 GLES_ActivateRenderer(renderer);
546
547 GLES_SetBlendMode(data, renderer->blendMode);
548
549 data->glColor4f((GLfloat) renderer->r * inv255f,
550 (GLfloat) renderer->g * inv255f,
551 (GLfloat) renderer->b * inv255f,
552 (GLfloat) renderer->a * inv255f);
553
554 vertices = SDL_stack_alloc(GLshort, count*2);
555 for (i = 0; i < count; ++i) {
556 vertices[2*i+0] = (GLshort)points[i].x;
557 vertices[2*i+1] = (GLshort)points[i].y;
558 }
559 data->glVertexPointer(2, GL_SHORT, 0, vertices);
560 if (count > 2 &&
561 points[0].x == points[count-1].x && points[0].y == points[count-1].y) {
562 /* GL_LINE_LOOP takes care of the final segment */
563 --count;
564 data->glDrawArrays(GL_LINE_LOOP, 0, count);
565 } else {
566 data->glDrawArrays(GL_LINE_STRIP, 0, count);
567 }
568 SDL_stack_free(vertices);
569
570 return 0;
571 }
572
573 static int
574 GLES_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
575 int count)
576 {
577 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
578 int i;
579
580 GLES_ActivateRenderer(renderer);
581
582 GLES_SetBlendMode(data, renderer->blendMode);
583
584 data->glColor4f((GLfloat) renderer->r * inv255f,
585 (GLfloat) renderer->g * inv255f,
586 (GLfloat) renderer->b * inv255f,
587 (GLfloat) renderer->a * inv255f);
588
589 for (i = 0; i < count; ++i) {
590 const SDL_Rect *rect = rects[i];
591 GLshort minx = rect->x;
592 GLshort maxx = rect->x + rect->w;
593 GLshort miny = rect->y;
594 GLshort maxy = rect->y + rect->h;
595 GLshort vertices[8];
596 vertices[0] = minx;
597 vertices[1] = miny;
598 vertices[2] = maxx;
599 vertices[3] = miny;
600 vertices[4] = minx;
601 vertices[5] = maxy;
602 vertices[6] = maxx;
603 vertices[7] = maxy;
604
605 data->glVertexPointer(2, GL_SHORT, 0, vertices);
606 data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
607 }
608
609 return 0;
610 }
611
612 static int
613 GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
614 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
615 {
616
617 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
618 GLES_TextureData *texturedata = (GLES_TextureData *) texture->driverdata;
619 int minx, miny, maxx, maxy;
620 GLfloat minu, maxu, minv, maxv;
621 int i;
622 void *temp_buffer; /* used for reformatting dirty rect pixels */
623 void *temp_ptr;
624
625 GLES_ActivateRenderer(renderer);
626
627 data->glEnable(GL_TEXTURE_2D);
628
629 data->glBindTexture(texturedata->type, texturedata->texture);
630
631 if (texture->modMode) {
632 data->glColor4f((GLfloat) texture->r * inv255f,
633 (GLfloat) texture->g * inv255f,
634 (GLfloat) texture->b * inv255f,
635 (GLfloat) texture->a * inv255f);
636 } else {
637 data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
638 }
639
640 GLES_SetBlendMode(data, texture->blendMode);
641
642 if (data->GL_OES_draw_texture_supported && data->useDrawTexture) {
643 /* this code is a little funny because the viewport is upside down vs SDL's coordinate system */
644 GLint cropRect[4];
645 int w, h;
646 SDL_Window *window = renderer->window;
647
648 SDL_GetWindowSize(window, &w, &h);
649 cropRect[0] = srcrect->x;
650 cropRect[1] = srcrect->y + srcrect->h;
651 cropRect[2] = srcrect->w;
652 cropRect[3] = -srcrect->h;
653 data->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES,
654 cropRect);
655 data->glDrawTexiOES(dstrect->x, h - dstrect->y - dstrect->h, 0,
656 dstrect->w, dstrect->h);
657 } else {
658
659 minx = dstrect->x;
660 miny = dstrect->y;
661 maxx = dstrect->x + dstrect->w;
662 maxy = dstrect->y + dstrect->h;
663
664 minu = (GLfloat) srcrect->x / texture->w;
665 minu *= texturedata->texw;
666 maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
667 maxu *= texturedata->texw;
668 minv = (GLfloat) srcrect->y / texture->h;
669 minv *= texturedata->texh;
670 maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
671 maxv *= texturedata->texh;
672
673 GLshort vertices[8];
674 GLfloat texCoords[8];
675
676 vertices[0] = minx;
677 vertices[1] = miny;
678 vertices[2] = maxx;
679 vertices[3] = miny;
680 vertices[4] = minx;
681 vertices[5] = maxy;
682 vertices[6] = maxx;
683 vertices[7] = maxy;
684
685 texCoords[0] = minu;
686 texCoords[1] = minv;
687 texCoords[2] = maxu;
688 texCoords[3] = minv;
689 texCoords[4] = minu;
690 texCoords[5] = maxv;
691 texCoords[6] = maxu;
692 texCoords[7] = maxv;
693
694 data->glVertexPointer(2, GL_SHORT, 0, vertices);
695 data->glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
696 data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
697 }
698
699 data->glDisable(GL_TEXTURE_2D);
700
701 return 0;
702 }
703
704 static void
705 GLES_RenderPresent(SDL_Renderer * renderer)
706 {
707 GLES_ActivateRenderer(renderer);
708
709 SDL_GL_SwapWindow(renderer->window);
710 }
711
712 static void
713 GLES_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
714 {
715 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
716
717 GLES_ActivateRenderer(renderer);
718
719 if (!data) {
720 return;
721 }
722 if (data->texture) {
723 glDeleteTextures(1, &data->texture);
724 }
725 if (data->pixels) {
726 SDL_free(data->pixels);
727 }
728 SDL_free(data);
729 texture->driverdata = NULL;
730 }
731
732 static void
733 GLES_DestroyRenderer(SDL_Renderer * renderer)
734 {
735 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
736
737 if (data) {
738 if (data->context) {
739 SDL_GL_DeleteContext(data->context);
740 }
741 SDL_free(data);
742 }
743 SDL_free(renderer);
744 }
745
746 #endif /* SDL_VIDEO_RENDER_OGL_ES */
747
748 /* vi: set ts=4 sw=4 expandtab: */