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comparison src/video/SDL_renderer_gles.c @ 2739:68862734a5fd

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These files are similar in purpose and structure as SDL_renderer_gl.c and SDL_renderer_gl.h, except they use OpenGL ES 1.1 for rendering.
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Tue, 02 Sep 2008 00:37:04 +0000
parents
children 0969758c8809
comparison
equal deleted inserted replaced
2738:79c1bd651f04 2739:68862734a5fd
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2006 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 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_video.h"
27 #include "SDL_opengles.h"
28 #include "SDL_sysvideo.h"
29 #include "SDL_pixels_c.h"
30 #include "SDL_rect_c.h"
31 #include "SDL_yuv_sw_c.h"
32
33 /* OpenGL ES 1.1 renderer implementation, based on the OpenGL renderer */
34
35 static const float inv255f = 1.0f / 255.0f;
36
37 static SDL_Renderer *GLES_CreateRenderer(SDL_Window * window, Uint32 flags);
38 static int GLES_ActivateRenderer(SDL_Renderer * renderer);
39 static int GLES_DisplayModeChanged(SDL_Renderer * renderer);
40 static int GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
41 static int GLES_QueryTexturePixels(SDL_Renderer * renderer,
42 SDL_Texture * texture, void **pixels,
43 int *pitch);
44 static int GLES_SetTexturePalette(SDL_Renderer * renderer,
45 SDL_Texture * texture,
46 const SDL_Color * colors, int firstcolor,
47 int ncolors);
48 static int GLES_GetTexturePalette(SDL_Renderer * renderer,
49 SDL_Texture * texture, SDL_Color * colors,
50 int firstcolor, int ncolors);
51 static int GLES_SetTextureColorMod(SDL_Renderer * renderer,
52 SDL_Texture * texture);
53 static int GLES_SetTextureAlphaMod(SDL_Renderer * renderer,
54 SDL_Texture * texture);
55 static int GLES_SetTextureBlendMode(SDL_Renderer * renderer,
56 SDL_Texture * texture);
57 static int GLES_SetTextureScaleMode(SDL_Renderer * renderer,
58 SDL_Texture * texture);
59 static int GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
60 const SDL_Rect * rect, const void *pixels,
61 int pitch);
62 static int GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
63 const SDL_Rect * rect, int markDirty, void **pixels,
64 int *pitch);
65 static void GLES_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
66 static void GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
67 int numrects, const SDL_Rect * rects);
68 static int GLES_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
69 Uint8 a, const SDL_Rect * rect);
70 static int GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
71 const SDL_Rect * srcrect, const SDL_Rect * dstrect);
72 static void GLES_RenderPresent(SDL_Renderer * renderer);
73 static void GLES_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
74 static void GLES_DestroyRenderer(SDL_Renderer * renderer);
75
76
77 SDL_RenderDriver GL_ES_RenderDriver = {
78 GLES_CreateRenderer,
79 {
80 "opengl_es",
81 (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD |
82 SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
83 (SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
84 SDL_TEXTUREMODULATE_ALPHA),
85 (SDL_TEXTUREBLENDMODE_NONE | SDL_TEXTUREBLENDMODE_MASK |
86 SDL_TEXTUREBLENDMODE_BLEND | SDL_TEXTUREBLENDMODE_ADD |
87 SDL_TEXTUREBLENDMODE_MOD),
88 (SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |
89 SDL_TEXTURESCALEMODE_SLOW), 2,
90 {
91 SDL_PIXELFORMAT_RGB24,
92 SDL_PIXELFORMAT_ABGR8888,
93 },
94 0,
95 0}
96 };
97
98 typedef struct
99 {
100 SDL_GLContext context;
101 SDL_bool updateSize;
102 int blendMode;
103
104 #ifndef APIENTRY
105 #define APIENTRY
106 #endif
107
108 SDL_bool useDrawTexture;
109 SDL_bool GL_OES_draw_texture_supported;
110
111 /* OpenGL ES functions */
112 #define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
113 #include "SDL_glesfuncs.h"
114 #undef SDL_PROC
115
116 } GLES_RenderData;
117
118 typedef struct
119 {
120 GLuint texture;
121 GLenum type;
122 GLfloat texw;
123 GLfloat texh;
124 GLenum format;
125 GLenum formattype;
126 void *pixels;
127 int pitch;
128 SDL_DirtyRectList dirty;
129 } GLES_TextureData;
130
131 static void
132 GLES_SetError(const char *prefix, GLenum result)
133 {
134 const char *error;
135
136 switch (result) {
137 case GL_NO_ERROR:
138 error = "GL_NO_ERROR";
139 break;
140 case GL_INVALID_ENUM:
141 error = "GL_INVALID_ENUM";
142 break;
143 case GL_INVALID_VALUE:
144 error = "GL_INVALID_VALUE";
145 break;
146 case GL_INVALID_OPERATION:
147 error = "GL_INVALID_OPERATION";
148 break;
149 case GL_STACK_OVERFLOW:
150 error = "GL_STACK_OVERFLOW";
151 break;
152 case GL_STACK_UNDERFLOW:
153 error = "GL_STACK_UNDERFLOW";
154 break;
155 case GL_OUT_OF_MEMORY:
156 error = "GL_OUT_OF_MEMORY";
157 break;
158 default:
159 error = "UNKNOWN";
160 break;
161 }
162 SDL_SetError("%s: %s", prefix, error);
163 }
164
165 static int
166 GLES_LoadFunctions(GLES_RenderData * data)
167 {
168
169 #define SDL_PROC(ret,func,params) \
170 data->func = func;
171 #include "SDL_glesfuncs.h"
172 #undef SDL_PROC
173
174 return 0;
175 }
176
177 void
178 GLES_AddRenderDriver(_THIS)
179 {
180 if (_this->GL_CreateContext) {
181 SDL_AddRenderDriver(0, &GL_ES_RenderDriver);
182 }
183 }
184
185 SDL_Renderer *
186 GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
187 {
188
189 SDL_Renderer *renderer;
190 GLES_RenderData *data;
191 GLint value;
192 int doublebuffer;
193
194 if (!(window->flags & SDL_WINDOW_OPENGL)) {
195 if (SDL_RecreateWindow(window, window->flags | SDL_WINDOW_OPENGL) < 0) {
196 return NULL;
197 }
198 }
199
200 renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
201 if (!renderer) {
202 SDL_OutOfMemory();
203 return NULL;
204 }
205
206 data = (GLES_RenderData *) SDL_calloc(1, sizeof(*data));
207 if (!data) {
208 GLES_DestroyRenderer(renderer);
209 SDL_OutOfMemory();
210 return NULL;
211 }
212
213 renderer->ActivateRenderer = GLES_ActivateRenderer;
214 renderer->DisplayModeChanged = GLES_DisplayModeChanged;
215 renderer->CreateTexture = GLES_CreateTexture;
216 renderer->QueryTexturePixels = GLES_QueryTexturePixels;
217 renderer->SetTexturePalette = GLES_SetTexturePalette;
218 renderer->GetTexturePalette = GLES_GetTexturePalette;
219 renderer->SetTextureColorMod = GLES_SetTextureColorMod;
220 renderer->SetTextureAlphaMod = GLES_SetTextureAlphaMod;
221 renderer->SetTextureBlendMode = GLES_SetTextureBlendMode;
222 renderer->SetTextureScaleMode = GLES_SetTextureScaleMode;
223 renderer->UpdateTexture = GLES_UpdateTexture;
224 renderer->LockTexture = GLES_LockTexture;
225 renderer->UnlockTexture = GLES_UnlockTexture;
226 renderer->DirtyTexture = GLES_DirtyTexture;
227 renderer->RenderFill = GLES_RenderFill;
228 renderer->RenderCopy = GLES_RenderCopy;
229 renderer->RenderPresent = GLES_RenderPresent;
230 renderer->DestroyTexture = GLES_DestroyTexture;
231 renderer->DestroyRenderer = GLES_DestroyRenderer;
232 renderer->info = GL_ES_RenderDriver.info;
233 renderer->window = window->id;
234 renderer->driverdata = data;
235
236
237 renderer->info.flags = (SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED);
238
239 if (GLES_LoadFunctions(data) < 0) {
240 GLES_DestroyRenderer(renderer);
241 return NULL;
242 }
243
244 data->context = SDL_GL_CreateContext(window->id);
245 if (!data->context) {
246 GLES_DestroyRenderer(renderer);
247 return NULL;
248 }
249 if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
250 GLES_DestroyRenderer(renderer);
251 return NULL;
252 }
253
254 if (flags & SDL_RENDERER_PRESENTVSYNC) {
255 SDL_GL_SetSwapInterval(1);
256 } else {
257 SDL_GL_SetSwapInterval(0);
258 }
259 if (SDL_GL_GetSwapInterval() > 0) {
260 renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
261 }
262
263 if (SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &doublebuffer) == 0) {
264 if (!doublebuffer) {
265 renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER;
266 }
267 }
268
269 if (SDL_GL_ExtensionSupported("GL_OES_draw_texture")) {
270 data->GL_OES_draw_texture_supported = SDL_TRUE;
271 data->useDrawTexture = SDL_TRUE;
272 }
273 else {
274 data->GL_OES_draw_texture_supported = SDL_FALSE;
275 data->useDrawTexture = SDL_FALSE;
276 }
277
278 data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
279 renderer->info.max_texture_width = value;
280 data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
281 renderer->info.max_texture_height = value;
282
283 /* Set up parameters for rendering */
284 data->blendMode = -1;
285 data->glDisable(GL_DEPTH_TEST);
286 data->glDisable(GL_CULL_FACE);
287 data->glEnable(GL_TEXTURE_2D);
288 data->updateSize = SDL_TRUE;
289
290 return renderer;
291 }
292
293 static int GLES_ActivateRenderer(SDL_Renderer * renderer)
294 {
295
296 GLES_RenderData *data = (GLES_RenderData *)renderer->driverdata;
297 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
298
299 if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
300 return -1;
301 }
302 if (data->updateSize) {
303 data->glMatrixMode(GL_PROJECTION);
304 data->glLoadIdentity();
305 data->glMatrixMode(GL_MODELVIEW);
306 data->glLoadIdentity();
307 data->glViewport(0, 0, window->w, window->h);
308 data->glOrthof(0.0, (GLfloat)window->w, (GLfloat)window->h, 0.0,
309 0.0, 1.0);
310 data->updateSize = SDL_FALSE;
311 }
312 return 0;
313 }
314
315 static int
316 GLES_DisplayModeChanged(SDL_Renderer * renderer)
317 {
318 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
319
320 data->updateSize = SDL_TRUE;
321 return 0;
322 }
323
324 static __inline__ int
325 power_of_2(int input)
326 {
327 int value = 1;
328
329 while (value < input) {
330 value <<= 1;
331 }
332 return value;
333 }
334
335 static int
336 GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
337 {
338 GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
339 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
340 GLES_TextureData *data;
341 GLint internalFormat;
342 GLenum format, type;
343 int texture_w, texture_h;
344 GLenum result;
345 switch (texture->format) {
346 case SDL_PIXELFORMAT_INDEX1LSB:
347 case SDL_PIXELFORMAT_INDEX1MSB:
348 case SDL_PIXELFORMAT_INDEX8:
349 case SDL_PIXELFORMAT_RGB332:
350 case SDL_PIXELFORMAT_RGB444:
351 case SDL_PIXELFORMAT_RGB555:
352 case SDL_PIXELFORMAT_ARGB4444:
353 case SDL_PIXELFORMAT_ARGB1555:
354 case SDL_PIXELFORMAT_BGR24:
355 case SDL_PIXELFORMAT_BGR888:
356 case SDL_PIXELFORMAT_RGB888:
357 case SDL_PIXELFORMAT_RGBA8888:
358 case SDL_PIXELFORMAT_ARGB2101010:
359 case SDL_PIXELFORMAT_ARGB8888:
360 case SDL_PIXELFORMAT_RGB24:
361 internalFormat = GL_RGB;
362 format = GL_RGB;
363 type = GL_UNSIGNED_BYTE;
364 break;
365 case SDL_PIXELFORMAT_ABGR8888:
366 internalFormat = GL_RGBA;
367 format = GL_RGBA;
368 type = GL_UNSIGNED_BYTE;
369 break;
370 /*
371 These formats would be supported if SDL had the necessary pixel formats
372 case SDL_PIXELFORMAT_BGR565:
373 internalFormat = GL_RGB;
374 format = GL_RGB;
375 type = GL_UNSIGNED_SHORT_5_6_5;
376 break;
377 case SDL_PIXELFORMAT_ABGR5551:
378 internalFormat = GL_RGBA;
379 format = GL_RGBA;
380 type = GL_UNSIGNED_SHORT_5_5_5_1;
381 break;
382 case SDL_PIXELFORMAT_ABGR4444:
383 internalFormat = GL_RGBA;
384 format = GL_RGBA;
385 type = GL_UNSIGNED_SHORT_4_4_4_4;
386 break;
387 */
388 default:
389 SDL_SetError("Unsupported texture format");
390 return -1;
391 }
392
393 data = (GLES_TextureData *) SDL_calloc(1, sizeof(*data));
394 if (!data) {
395 SDL_OutOfMemory();
396 return -1;
397 }
398
399 if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
400 data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
401 data->pixels = SDL_malloc(texture->h * data->pitch);
402 if (!data->pixels) {
403 SDL_OutOfMemory();
404 SDL_free(data);
405 return -1;
406 }
407 }
408
409 texture->driverdata = data;
410
411 renderdata->glGetError();
412 renderdata->glGenTextures(1, &data->texture);
413
414 data->type = GL_TEXTURE_2D;
415 /* no NPOV textures allowed in OpenGL ES (yet) */
416 texture_w = power_of_2(texture->w);
417 texture_h = power_of_2(texture->h);
418 data->texw = (GLfloat) texture->w / texture_w;
419 data->texh = (GLfloat) texture->h / texture_h;
420
421 data->format = format;
422 data->formattype = type;
423 renderdata->glBindTexture(data->type, data->texture);
424 renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
425 GL_NEAREST);
426 renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
427 GL_NEAREST);
428 renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
429 GL_CLAMP_TO_EDGE);
430 renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
431 GL_CLAMP_TO_EDGE);
432
433 renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
434 texture_h, 0, format, type, NULL);
435
436 result = renderdata->glGetError();
437 if (result != GL_NO_ERROR) {
438 GLES_SetError("glTexImage2D()", result);
439 return -1;
440 }
441 return 0;
442 }
443
444 static int
445 GLES_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
446 void **pixels, int *pitch)
447 {
448 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
449
450 *pixels = data->pixels;
451 *pitch = data->pitch;
452 return 0;
453 }
454
455 static int
456 GLES_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
457 const SDL_Color * colors, int firstcolor, int ncolors)
458 {
459 SDL_SetError("OpenGL ES does not support paletted textures");
460 return -1;
461 }
462
463 static int
464 GLES_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
465 SDL_Color * colors, int firstcolor, int ncolors)
466 {
467 SDL_SetError("OpenGL ES does not support paletted textures");
468 return -1;
469 }
470
471 static void
472 SetupTextureUpdate(GLES_RenderData * renderdata, SDL_Texture * texture,
473 int pitch)
474 {
475
476
477 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
478 renderdata->glBindTexture(data->type, data->texture);
479 renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
480 }
481
482 static int
483 GLES_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
484 {
485 return 0;
486 }
487
488 static int
489 GLES_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
490 {
491 return 0;
492 }
493
494 static int
495 GLES_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
496 {
497 switch (texture->blendMode) {
498 case SDL_TEXTUREBLENDMODE_NONE:
499 case SDL_TEXTUREBLENDMODE_MASK:
500 case SDL_TEXTUREBLENDMODE_BLEND:
501 case SDL_TEXTUREBLENDMODE_ADD:
502 case SDL_TEXTUREBLENDMODE_MOD:
503 return 0;
504 default:
505 SDL_Unsupported();
506 texture->blendMode = SDL_TEXTUREBLENDMODE_NONE;
507 return -1;
508 }
509 }
510
511 static int
512 GLES_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
513 {
514 switch (texture->scaleMode) {
515 case SDL_TEXTURESCALEMODE_NONE:
516 case SDL_TEXTURESCALEMODE_FAST:
517 case SDL_TEXTURESCALEMODE_SLOW:
518 return 0;
519 case SDL_TEXTURESCALEMODE_BEST:
520 SDL_Unsupported();
521 texture->scaleMode = SDL_TEXTURESCALEMODE_SLOW;
522 return -1;
523 default:
524 SDL_Unsupported();
525 texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
526 return -1;
527 }
528 }
529
530 static int
531 GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
532 const SDL_Rect * rect, const void *pixels, int pitch)
533 {
534 GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
535 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
536 GLenum result;
537
538 SetupTextureUpdate(renderdata, texture, pitch);
539 renderdata->glGetError();
540 renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
541 rect->h, data->format, data->formattype,
542 pixels);
543 result = renderdata->glGetError();
544 if (result != GL_NO_ERROR) {
545 GLES_SetError("glTexSubImage2D()", result);
546 return -1;
547 }
548 return 0;
549 }
550
551 static int
552 GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
553 const SDL_Rect * rect, int markDirty, void **pixels,
554 int *pitch)
555 {
556 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
557
558 if (markDirty) {
559 SDL_AddDirtyRect(&data->dirty, rect);
560 }
561
562 *pixels =
563 (void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
564 rect->x * SDL_BYTESPERPIXEL(texture->format));
565 *pitch = data->pitch;
566 return 0;
567 }
568
569 static void
570 GLES_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
571 {
572 }
573
574 static void
575 GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, int numrects,
576 const SDL_Rect * rects)
577 {
578 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
579 int i;
580
581 for (i = 0; i < numrects; ++i) {
582 SDL_AddDirtyRect(&data->dirty, &rects[i]);
583 }
584 }
585
586 static int
587 GLES_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 a,
588 const SDL_Rect * rect)
589 {
590
591 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
592 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
593
594 /* set proper drawing color */
595 GLfloat oldClearColor[4];
596
597 data->glGetFloatv(GL_COLOR_CLEAR_VALUE, oldClearColor);
598
599 data->glClearColor((GLclampf) r * inv255f, (GLclampf) g * inv255f,
600 (GLclampf) b * inv255f, (GLclampf) a * inv255f);
601
602 data->glScissor(rect->x, window->h - rect->y - rect->h, rect->w, rect->h);
603 data->glEnable(GL_SCISSOR_TEST);
604 data->glClear(GL_COLOR_BUFFER_BIT);
605 data->glDisable(GL_SCISSOR_TEST);
606
607 /* reset clear color */
608 data->glClearColor(oldClearColor[0], oldClearColor[1], oldClearColor[2], oldClearColor[2]);
609
610 return 0;
611 }
612
613 static int
614 GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
615 const SDL_Rect * srcrect, const SDL_Rect * dstrect)
616 {
617
618 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
619 GLES_TextureData *texturedata = (GLES_TextureData *) texture->driverdata;
620 int minx, miny, maxx, maxy;
621 GLfloat minu, maxu, minv, maxv;
622 int i;
623 void *temp_buffer; /* used for reformatting dirty rect pixels */
624 void *temp_ptr;
625
626 if (texturedata->dirty.list) {
627 SDL_DirtyRect *dirty;
628 void *pixels;
629 int bpp = SDL_BYTESPERPIXEL(texture->format);
630 int pitch = texturedata->pitch;
631
632 SetupTextureUpdate(data, texture, pitch);
633
634 data->glBindTexture(texturedata->type, texturedata->texture);
635 for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) {
636 SDL_Rect *rect = &dirty->rect;
637 pixels = (void *) ((Uint8 *) texturedata->pixels + rect->y * pitch + rect->x * bpp);
638 /* There is no GL_UNPACK_ROW_LENGTH in OpenGLES
639 we must do this reformatting ourselves(!)
640
641 maybe it'd be a good idea to keep a temp buffer around
642 for this purpose rather than allocating it each time
643 */
644 temp_buffer = SDL_malloc(rect->w * rect->h * bpp);
645 temp_ptr = temp_buffer;
646 for (i=0; i<rect->h; i++) {
647 SDL_memcpy(temp_ptr, pixels, rect->w * bpp);
648 temp_ptr += rect->w * bpp;
649 pixels += pitch;
650 }
651
652 data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y,
653 rect->w, rect->h, texturedata->format,
654 texturedata->formattype, temp_buffer);
655
656 SDL_free(temp_buffer);
657
658 }
659 SDL_ClearDirtyRects(&texturedata->dirty);
660 }
661
662 data->glBindTexture(texturedata->type, texturedata->texture);
663 data->glEnable(GL_TEXTURE_2D);
664
665 if (texture->modMode) {
666 data->glColor4f((GLfloat) texture->r * inv255f,
667 (GLfloat) texture->g * inv255f,
668 (GLfloat) texture->b * inv255f,
669 (GLfloat) texture->a * inv255f);
670 } else {
671 data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
672 }
673
674 if (texture->blendMode != data->blendMode) {
675 switch (texture->blendMode) {
676 case SDL_TEXTUREBLENDMODE_NONE:
677 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
678 data->glDisable(GL_BLEND);
679 break;
680 case SDL_TEXTUREBLENDMODE_MASK:
681 case SDL_TEXTUREBLENDMODE_BLEND:
682 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
683 data->glEnable(GL_BLEND);
684 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
685 break;
686 case SDL_TEXTUREBLENDMODE_ADD:
687 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
688 data->glEnable(GL_BLEND);
689 data->glBlendFunc(GL_SRC_ALPHA, GL_ONE);
690 break;
691 case SDL_TEXTUREBLENDMODE_MOD:
692 data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
693 data->glEnable(GL_BLEND);
694 data->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
695 break;
696 }
697 data->blendMode = texture->blendMode;
698 }
699
700 switch (texture->scaleMode) {
701 case SDL_TEXTURESCALEMODE_NONE:
702 case SDL_TEXTURESCALEMODE_FAST:
703 data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
704 GL_NEAREST);
705 data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
706 GL_NEAREST);
707 break;
708 case SDL_TEXTURESCALEMODE_SLOW:
709 case SDL_TEXTURESCALEMODE_BEST:
710 data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
711 GL_LINEAR);
712 data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
713 GL_LINEAR);
714 break;
715 }
716
717 if (data->GL_OES_draw_texture_supported && data->useDrawTexture) {
718 /* this code is a little funny because the viewport is upside down vs SDL's coordinate system */
719 SDL_Window *window = SDL_GetWindowFromID(renderer->window);
720 GLint cropRect[4];
721 cropRect[0] = srcrect->x;
722 cropRect[1] = srcrect->y + srcrect->h;
723 cropRect[2] = srcrect->w;
724 cropRect[3] = -srcrect->h;
725 data->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, cropRect);
726 data->glDrawTexiOES(dstrect->x, window->h - dstrect->y - dstrect->h, 0, dstrect->w, dstrect->h);
727 }
728 else {
729
730 minx = dstrect->x;
731 miny = dstrect->y;
732 maxx = dstrect->x + dstrect->w;
733 maxy = dstrect->y + dstrect->h;
734
735 minu = (GLfloat) srcrect->x / texture->w;
736 minu *= texturedata->texw;
737 maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
738 maxu *= texturedata->texw;
739 minv = (GLfloat) srcrect->y / texture->h;
740 minv *= texturedata->texh;
741 maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
742 maxv *= texturedata->texh;
743
744 GLshort vertices[8];
745 GLfloat texCoords[8];
746
747 vertices[0] = minx; vertices[1] = miny;
748 vertices[2] = maxx; vertices[3] = miny;
749 vertices[4] = minx; vertices[5] = maxy;
750 vertices[6] = maxx; vertices[7] = maxy;
751
752 texCoords[0] = minu; texCoords[1] = minv;
753 texCoords[2] = maxu; texCoords[3] = minv;
754 texCoords[4] = minu; texCoords[5] = maxv;
755 texCoords[6] = maxu; texCoords[7] = maxv;
756
757 data->glVertexPointer(2, GL_SHORT, 0, vertices);
758 data->glEnableClientState(GL_VERTEX_ARRAY);
759 data->glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
760 data->glEnableClientState(GL_TEXTURE_COORD_ARRAY);
761 data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
762
763 }
764
765 return 0;
766 }
767
768 static void
769 GLES_RenderPresent(SDL_Renderer * renderer)
770 {
771 SDL_GL_SwapWindow(renderer->window);
772 }
773
774 static void
775 GLES_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
776 {
777 GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
778 GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
779
780 if (!data) {
781 return;
782 }
783 if (data->texture) {
784 glDeleteTextures(1, &data->texture);
785 }
786 if (data->pixels) {
787 SDL_free(data->pixels);
788 }
789 SDL_FreeDirtyRects(&data->dirty);
790 SDL_free(data);
791 texture->driverdata = NULL;
792 }
793
794 static void
795 GLES_DestroyRenderer(SDL_Renderer * renderer)
796 {
797 GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
798
799 if (data) {
800 if (data->context) {
801 /* SDL_GL_MakeCurrent(0, NULL); *//* doesn't do anything */
802 SDL_GL_DeleteContext(data->context);
803 }
804 SDL_free(data);
805 }
806 SDL_free(renderer);
807 }
808
809 #endif /* SDL_VIDEO_RENDER_OGL */
810
811 /* vi: set ts=4 sw=4 expandtab: */