This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_renderer_gles.c
922 lines (793 loc) · 27.9 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2009 Sam Lantinga
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#if SDL_VIDEO_RENDER_OGL_ES
#include "SDL_video.h"
#include "SDL_opengles.h"
#include "SDL_sysvideo.h"
#include "SDL_pixels_c.h"
#include "SDL_rect_c.h"
#include "SDL_yuv_sw_c.h"
33
34
35
#if defined(__QNXNTO__)
/* Include QNX system header to check QNX version later */
#include <sys/neutrino.h>
36
37
#endif /* __QNXNTO__ */
38
39
40
41
42
43
#if defined(SDL_VIDEO_DRIVER_QNXGF) || \
defined(SDL_VIDEO_DRIVER_PHOTON) || \
defined(SDL_VIDEO_DRIVER_PANDORA)
/* Empty function stub to get OpenGL ES 1.x support without */
/* OpenGL ES extension GL_OES_draw_texture supported */
44
45
46
47
48
GL_API void GL_APIENTRY
glDrawTexiOES(GLint x, GLint y, GLint z, GLint width, GLint height)
{
return;
}
49
50
#endif /* QNXGF || PHOTON || PANDORA */
51
52
53
54
55
56
57
58
59
60
/* OpenGL ES 1.1 renderer implementation, based on the OpenGL renderer */
static const float inv255f = 1.0f / 255.0f;
static SDL_Renderer *GLES_CreateRenderer(SDL_Window * window, Uint32 flags);
static int GLES_ActivateRenderer(SDL_Renderer * renderer);
static int GLES_DisplayModeChanged(SDL_Renderer * renderer);
static int GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GLES_QueryTexturePixels(SDL_Renderer * renderer,
61
62
SDL_Texture * texture, void **pixels,
int *pitch);
63
static int GLES_SetTexturePalette(SDL_Renderer * renderer,
64
65
66
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
67
static int GLES_GetTexturePalette(SDL_Renderer * renderer,
68
69
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
70
static int GLES_SetTextureColorMod(SDL_Renderer * renderer,
71
SDL_Texture * texture);
72
static int GLES_SetTextureAlphaMod(SDL_Renderer * renderer,
73
SDL_Texture * texture);
74
static int GLES_SetTextureBlendMode(SDL_Renderer * renderer,
75
SDL_Texture * texture);
76
static int GLES_SetTextureScaleMode(SDL_Renderer * renderer,
77
SDL_Texture * texture);
78
static int GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
79
80
const SDL_Rect * rect, const void *pixels,
int pitch);
81
static int GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
82
83
84
85
const SDL_Rect * rect, int markDirty,
void **pixels, int *pitch);
static void GLES_UnlockTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
86
static void GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
87
int numrects, const SDL_Rect * rects);
88
89
90
91
static int GLES_RenderPoint(SDL_Renderer * renderer, int x, int y);
static int GLES_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2,
int y2);
static int GLES_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect);
92
static int GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
93
94
const SDL_Rect * srcrect,
const SDL_Rect * dstrect);
95
static void GLES_RenderPresent(SDL_Renderer * renderer);
96
97
static void GLES_DestroyTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
98
99
100
101
102
103
104
105
106
107
108
static void GLES_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver GL_ES_RenderDriver = {
GLES_CreateRenderer,
{
"opengl_es",
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD |
SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
SDL_TEXTUREMODULATE_ALPHA),
109
110
(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK |
SDL_BLENDMODE_BLEND | SDL_BLENDMODE_ADD | SDL_BLENDMODE_MOD),
111
(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |
112
SDL_TEXTURESCALEMODE_SLOW), 5,
113
{
114
/* OpenGL ES 1.x supported formats list */
115
116
117
SDL_PIXELFORMAT_ABGR4444,
SDL_PIXELFORMAT_ABGR1555,
SDL_PIXELFORMAT_BGR565,
118
SDL_PIXELFORMAT_BGR24,
119
SDL_PIXELFORMAT_ABGR8888},
120
0,
121
122
123
124
125
126
127
128
0}
};
typedef struct
{
SDL_GLContext context;
SDL_bool updateSize;
int blendMode;
129
130
131
132
#ifndef APIENTRY
#define APIENTRY
#endif
133
134
135
136
137
138
139
140
SDL_bool useDrawTexture;
SDL_bool GL_OES_draw_texture_supported;
/* OpenGL ES functions */
#define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
#include "SDL_glesfuncs.h"
#undef SDL_PROC
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
} GLES_RenderData;
typedef struct
{
GLuint texture;
GLenum type;
GLfloat texw;
GLfloat texh;
GLenum format;
GLenum formattype;
void *pixels;
int pitch;
SDL_DirtyRectList dirty;
} GLES_TextureData;
static void
GLES_SetError(const char *prefix, GLenum result)
{
const char *error;
switch (result) {
case GL_NO_ERROR:
error = "GL_NO_ERROR";
break;
case GL_INVALID_ENUM:
error = "GL_INVALID_ENUM";
break;
case GL_INVALID_VALUE:
error = "GL_INVALID_VALUE";
break;
case GL_INVALID_OPERATION:
error = "GL_INVALID_OPERATION";
break;
case GL_STACK_OVERFLOW:
error = "GL_STACK_OVERFLOW";
break;
case GL_STACK_UNDERFLOW:
error = "GL_STACK_UNDERFLOW";
break;
case GL_OUT_OF_MEMORY:
error = "GL_OUT_OF_MEMORY";
break;
default:
error = "UNKNOWN";
break;
}
SDL_SetError("%s: %s", prefix, error);
}
static int
GLES_LoadFunctions(GLES_RenderData * data)
{
194
195
#define SDL_PROC(ret,func,params) \
196
data->func = func;
197
198
199
#include "SDL_glesfuncs.h"
#undef SDL_PROC
200
201
202
203
204
205
206
207
208
209
210
211
212
213
return 0;
}
void
GLES_AddRenderDriver(_THIS)
{
if (_this->GL_CreateContext) {
SDL_AddRenderDriver(0, &GL_ES_RenderDriver);
}
}
SDL_Renderer *
GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
{
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
SDL_Renderer *renderer;
GLES_RenderData *data;
GLint value;
int doublebuffer;
if (!(window->flags & SDL_WINDOW_OPENGL)) {
if (SDL_RecreateWindow(window, window->flags | SDL_WINDOW_OPENGL) < 0) {
return NULL;
}
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = (GLES_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
GLES_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
renderer->ActivateRenderer = GLES_ActivateRenderer;
renderer->DisplayModeChanged = GLES_DisplayModeChanged;
renderer->CreateTexture = GLES_CreateTexture;
renderer->QueryTexturePixels = GLES_QueryTexturePixels;
renderer->SetTexturePalette = GLES_SetTexturePalette;
renderer->GetTexturePalette = GLES_GetTexturePalette;
renderer->SetTextureColorMod = GLES_SetTextureColorMod;
renderer->SetTextureAlphaMod = GLES_SetTextureAlphaMod;
renderer->SetTextureBlendMode = GLES_SetTextureBlendMode;
renderer->SetTextureScaleMode = GLES_SetTextureScaleMode;
renderer->UpdateTexture = GLES_UpdateTexture;
renderer->LockTexture = GLES_LockTexture;
renderer->UnlockTexture = GLES_UnlockTexture;
renderer->DirtyTexture = GLES_DirtyTexture;
253
254
renderer->RenderPoint = GLES_RenderPoint;
renderer->RenderLine = GLES_RenderLine;
255
256
257
258
259
260
261
262
renderer->RenderFill = GLES_RenderFill;
renderer->RenderCopy = GLES_RenderCopy;
renderer->RenderPresent = GLES_RenderPresent;
renderer->DestroyTexture = GLES_DestroyTexture;
renderer->DestroyRenderer = GLES_DestroyRenderer;
renderer->info = GL_ES_RenderDriver.info;
renderer->window = window->id;
renderer->driverdata = data;
263
264
265
renderer->info.flags =
(SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED);
266
267
268
269
270
#if defined(__QNXNTO__)
#if _NTO_VERSION<=641
/* QNX's OpenGL ES implementation is broken regarding */
/* packed textures support, affected versions 6.3.2, 6.4.0, 6.4.1 */
271
272
273
renderer->info.num_texture_formats = 2;
renderer->info.texture_formats[0] = SDL_PIXELFORMAT_ABGR8888;
renderer->info.texture_formats[1] = SDL_PIXELFORMAT_BGR24;
274
275
276
#endif /* _NTO_VERSION */
#endif /* __QNXNTO__ */
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
if (GLES_LoadFunctions(data) < 0) {
GLES_DestroyRenderer(renderer);
return NULL;
}
data->context = SDL_GL_CreateContext(window->id);
if (!data->context) {
GLES_DestroyRenderer(renderer);
return NULL;
}
if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
GLES_DestroyRenderer(renderer);
return NULL;
}
if (flags & SDL_RENDERER_PRESENTVSYNC) {
SDL_GL_SetSwapInterval(1);
} else {
SDL_GL_SetSwapInterval(0);
}
if (SDL_GL_GetSwapInterval() > 0) {
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
}
if (SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &doublebuffer) == 0) {
if (!doublebuffer) {
renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER;
}
}
306
307
308
309
#if SDL_VIDEO_DRIVER_PANDORA
data->GL_OES_draw_texture_supported = SDL_FALSE;
data->useDrawTexture = SDL_FALSE;
#else
310
311
312
313
314
315
316
if (SDL_GL_ExtensionSupported("GL_OES_draw_texture")) {
data->GL_OES_draw_texture_supported = SDL_TRUE;
data->useDrawTexture = SDL_TRUE;
} else {
data->GL_OES_draw_texture_supported = SDL_FALSE;
data->useDrawTexture = SDL_FALSE;
}
317
#endif
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
renderer->info.max_texture_width = value;
data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
renderer->info.max_texture_height = value;
/* Set up parameters for rendering */
data->blendMode = -1;
data->glDisable(GL_DEPTH_TEST);
data->glDisable(GL_CULL_FACE);
data->updateSize = SDL_TRUE;
return renderer;
}
333
334
static int
GLES_ActivateRenderer(SDL_Renderer * renderer)
335
{
336
337
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
338
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
339
340
341
342
343
344
345
346
347
348
if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
return -1;
}
if (data->updateSize) {
data->glMatrixMode(GL_PROJECTION);
data->glLoadIdentity();
data->glMatrixMode(GL_MODELVIEW);
data->glLoadIdentity();
data->glViewport(0, 0, window->w, window->h);
349
350
data->glOrthof(0.0, (GLfloat) window->w, (GLfloat) window->h, 0.0,
0.0, 1.0);
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
data->updateSize = SDL_FALSE;
}
return 0;
}
static int
GLES_DisplayModeChanged(SDL_Renderer * renderer)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
data->updateSize = SDL_TRUE;
return 0;
}
static __inline__ int
power_of_2(int input)
{
int value = 1;
while (value < input) {
value <<= 1;
}
return value;
}
static int
377
GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
378
379
380
381
382
383
384
385
{
GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
GLES_TextureData *data;
GLint internalFormat;
GLenum format, type;
int texture_w, texture_h;
GLenum result;
386
387
388
switch (texture->format) {
case SDL_PIXELFORMAT_BGR24:
389
390
391
392
internalFormat = GL_RGB;
format = GL_RGB;
type = GL_UNSIGNED_BYTE;
break;
393
case SDL_PIXELFORMAT_ABGR8888:
394
395
396
397
internalFormat = GL_RGBA;
format = GL_RGBA;
type = GL_UNSIGNED_BYTE;
break;
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
case SDL_PIXELFORMAT_BGR565:
internalFormat = GL_RGB;
format = GL_RGB;
type = GL_UNSIGNED_SHORT_5_6_5;
break;
case SDL_PIXELFORMAT_ABGR1555:
internalFormat = GL_RGBA;
format = GL_RGBA;
type = GL_UNSIGNED_SHORT_5_5_5_1;
break;
case SDL_PIXELFORMAT_ABGR4444:
internalFormat = GL_RGBA;
format = GL_RGBA;
type = GL_UNSIGNED_SHORT_4_4_4_4;
break;
413
default:
414
SDL_SetError("Unsupported by OpenGL ES texture format");
415
416
417
418
return -1;
}
data = (GLES_TextureData *) SDL_calloc(1, sizeof(*data));
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
if (!data) {
SDL_OutOfMemory();
return -1;
}
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
data->pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
data->pixels = SDL_malloc(texture->h * data->pitch);
if (!data->pixels) {
SDL_OutOfMemory();
SDL_free(data);
return -1;
}
}
texture->driverdata = data;
renderdata->glGetError();
437
renderdata->glEnable(GL_TEXTURE_2D);
438
renderdata->glGenTextures(1, &data->texture);
439
440
441
442
443
444
445
446
data->type = GL_TEXTURE_2D;
/* no NPOV textures allowed in OpenGL ES (yet) */
texture_w = power_of_2(texture->w);
texture_h = power_of_2(texture->h);
data->texw = (GLfloat) texture->w / texture_w;
data->texh = (GLfloat) texture->h / texture_h;
447
448
449
450
451
452
453
454
455
456
457
data->format = format;
data->formattype = type;
renderdata->glBindTexture(data->type, data->texture);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
renderdata->glTexParameteri(data->type, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
renderdata->glTexParameteri(data->type, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
458
459
460
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, NULL);
461
renderdata->glDisable(GL_TEXTURE_2D);
462
463
464
465
466
467
468
469
470
471
472
result = renderdata->glGetError();
if (result != GL_NO_ERROR) {
GLES_SetError("glTexImage2D()", result);
return -1;
}
return 0;
}
static int
GLES_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
473
void **pixels, int *pitch)
474
475
476
477
478
479
480
481
482
483
{
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
*pixels = data->pixels;
*pitch = data->pitch;
return 0;
}
static int
GLES_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
484
const SDL_Color * colors, int firstcolor, int ncolors)
485
{
486
SDL_SetError("OpenGL ES does not support paletted textures");
487
488
489
490
491
return -1;
}
static int
GLES_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
492
SDL_Color * colors, int firstcolor, int ncolors)
493
{
494
SDL_SetError("OpenGL ES does not support paletted textures");
495
496
497
498
499
500
501
return -1;
}
static void
SetupTextureUpdate(GLES_RenderData * renderdata, SDL_Texture * texture,
int pitch)
{
502
503
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
renderdata->glBindTexture(data->type, data->texture);
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
}
static int
GLES_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
return 0;
}
static int
GLES_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
return 0;
}
static int
GLES_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->blendMode) {
523
524
525
526
527
case SDL_BLENDMODE_NONE:
case SDL_BLENDMODE_MASK:
case SDL_BLENDMODE_BLEND:
case SDL_BLENDMODE_ADD:
case SDL_BLENDMODE_MOD:
528
529
530
return 0;
default:
SDL_Unsupported();
531
texture->blendMode = SDL_BLENDMODE_NONE;
532
533
534
535
536
537
538
539
540
541
542
543
544
545
return -1;
}
}
static int
GLES_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->scaleMode) {
case SDL_TEXTURESCALEMODE_NONE:
case SDL_TEXTURESCALEMODE_FAST:
case SDL_TEXTURESCALEMODE_SLOW:
return 0;
case SDL_TEXTURESCALEMODE_BEST:
SDL_Unsupported();
546
texture->scaleMode = SDL_TEXTURESCALEMODE_SLOW;
547
548
549
550
551
552
553
554
555
return -1;
default:
SDL_Unsupported();
texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
return -1;
}
}
static int
556
557
GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
558
559
560
561
562
{
GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
GLenum result;
563
renderdata->glGetError();
564
565
renderdata->glEnable(data->type);
SetupTextureUpdate(renderdata, texture, pitch);
566
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
567
568
rect->h, data->format, data->formattype,
pixels);
569
renderdata->glDisable(data->type);
570
571
572
573
574
575
576
577
578
579
result = renderdata->glGetError();
if (result != GL_NO_ERROR) {
GLES_SetError("glTexSubImage2D()", result);
return -1;
}
return 0;
}
static int
GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
580
581
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
{
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
if (markDirty) {
SDL_AddDirtyRect(&data->dirty, rect);
}
*pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = data->pitch;
return 0;
}
static void
GLES_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
}
static void
602
603
GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
int numrects, const SDL_Rect * rects)
604
605
606
607
608
609
610
611
612
{
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
int i;
for (i = 0; i < numrects; ++i) {
SDL_AddDirtyRect(&data->dirty, &rects[i]);
}
}
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
static void
GLES_SetBlendMode(GLES_RenderData * data, int blendMode)
{
if (blendMode != data->blendMode) {
switch (blendMode) {
case SDL_BLENDMODE_NONE:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
data->glDisable(GL_BLEND);
break;
case SDL_BLENDMODE_MASK:
case SDL_BLENDMODE_BLEND:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
break;
case SDL_BLENDMODE_ADD:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFunc(GL_SRC_ALPHA, GL_ONE);
break;
case SDL_BLENDMODE_MOD:
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
break;
}
data->blendMode = blendMode;
}
}
643
static int
644
GLES_RenderPoint(SDL_Renderer * renderer, int x, int y)
645
{
646
647
648
649
650
651
652
653
654
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
GLES_SetBlendMode(data, renderer->blendMode);
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
655
656
657
658
659
660
661
662
663
GLshort vertices[2];
vertices[0] = x;
vertices[1] = y;
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glDrawArrays(GL_POINTS, 0, 1);
data->glDisableClientState(GL_VERTEX_ARRAY);
664
665
data->glDisable(GL_BLEND);
666
667
return 0;
}
668
669
670
671
static int
GLES_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
{
672
673
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
674
GLES_SetBlendMode(data, renderer->blendMode);
675
676
677
678
679
680
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
681
682
683
684
685
GLshort vertices[4];
vertices[0] = x1;
vertices[1] = y1;
vertices[2] = x2;
vertices[3] = y2;
686
687
688
689
690
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glDrawArrays(GL_LINES, 0, 2);
data->glDisableClientState(GL_VERTEX_ARRAY);
691
692
693
data->glDisable(GL_BLEND);
694
695
return 0;
}
696
697
698
699
700
static int
GLES_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
701
702
GLES_SetBlendMode(data, renderer->blendMode);
703
704
705
706
707
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
GLshort minx = rect->x;
GLshort maxx = rect->x + rect->w;
GLshort miny = rect->y;
GLshort maxy = rect->y + rect->h;
GLshort vertices[8];
vertices[0] = minx;
vertices[1] = miny;
vertices[2] = maxx;
vertices[3] = miny;
vertices[4] = minx;
vertices[5] = maxy;
vertices[6] = maxx;
vertices[7] = maxy;
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
data->glDisableClientState(GL_VERTEX_ARRAY);
728
729
730
data->glDisable(GL_BLEND);
731
return 0;
732
733
734
735
}
static int
GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
736
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
737
{
738
739
740
741
742
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
GLES_TextureData *texturedata = (GLES_TextureData *) texture->driverdata;
int minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
743
744
745
746
int i;
void *temp_buffer; /* used for reformatting dirty rect pixels */
void *temp_ptr;
747
748
data->glEnable(GL_TEXTURE_2D);
749
750
751
752
753
754
755
if (texturedata->dirty.list) {
SDL_DirtyRect *dirty;
void *pixels;
int bpp = SDL_BYTESPERPIXEL(texture->format);
int pitch = texturedata->pitch;
SetupTextureUpdate(data, texture, pitch);
756
757
758
759
data->glBindTexture(texturedata->type, texturedata->texture);
for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) {
SDL_Rect *rect = &dirty->rect;
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
pixels =
(void *) ((Uint8 *) texturedata->pixels + rect->y * pitch +
rect->x * bpp);
/* There is no GL_UNPACK_ROW_LENGTH in OpenGLES
we must do this reformatting ourselves(!)
maybe it'd be a good idea to keep a temp buffer around
for this purpose rather than allocating it each time
*/
temp_buffer = SDL_malloc(rect->w * rect->h * bpp);
temp_ptr = temp_buffer;
for (i = 0; i < rect->h; i++) {
SDL_memcpy(temp_ptr, pixels, rect->w * bpp);
temp_ptr += rect->w * bpp;
pixels += pitch;
}
777
778
779
data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y,
rect->w, rect->h, texturedata->format,
texturedata->formattype, temp_buffer);
780
781
782
SDL_free(temp_buffer);
783
784
785
}
SDL_ClearDirtyRects(&texturedata->dirty);
}
786
787
data->glBindTexture(texturedata->type, texturedata->texture);
788
789
790
791
792
793
794
795
796
797
if (texture->modMode) {
data->glColor4f((GLfloat) texture->r * inv255f,
(GLfloat) texture->g * inv255f,
(GLfloat) texture->b * inv255f,
(GLfloat) texture->a * inv255f);
} else {
data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
}
798
GLES_SetBlendMode(data, texture->blendMode);
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
switch (texture->scaleMode) {
case SDL_TEXTURESCALEMODE_NONE:
case SDL_TEXTURESCALEMODE_FAST:
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
break;
case SDL_TEXTURESCALEMODE_SLOW:
case SDL_TEXTURESCALEMODE_BEST:
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
break;
}
if (data->GL_OES_draw_texture_supported && data->useDrawTexture) {
/* this code is a little funny because the viewport is upside down vs SDL's coordinate system */
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
GLint cropRect[4];
cropRect[0] = srcrect->x;
cropRect[1] = srcrect->y + srcrect->h;
cropRect[2] = srcrect->w;
cropRect[3] = -srcrect->h;
data->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES,
cropRect);
data->glDrawTexiOES(dstrect->x, window->h - dstrect->y - dstrect->h,
0, dstrect->w, dstrect->h);
} else {
minx = dstrect->x;
miny = dstrect->y;
maxx = dstrect->x + dstrect->w;
maxy = dstrect->y + dstrect->h;
minu = (GLfloat) srcrect->x / texture->w;
minu *= texturedata->texw;
maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
maxu *= texturedata->texw;
minv = (GLfloat) srcrect->y / texture->h;
minv *= texturedata->texh;
maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
maxv *= texturedata->texh;
GLshort vertices[8];
GLfloat texCoords[8];
vertices[0] = minx;
vertices[1] = miny;
vertices[2] = maxx;
vertices[3] = miny;
vertices[4] = minx;
vertices[5] = maxy;
vertices[6] = maxx;
vertices[7] = maxy;
texCoords[0] = minu;
texCoords[1] = minv;
texCoords[2] = maxu;
texCoords[3] = minv;
texCoords[4] = minu;
texCoords[5] = maxv;
texCoords[6] = maxu;
texCoords[7] = maxv;
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
data->glEnableClientState(GL_TEXTURE_COORD_ARRAY);
data->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
871
872
data->glDisableClientState(GL_TEXTURE_COORD_ARRAY);
data->glDisableClientState(GL_VERTEX_ARRAY);
873
874
}
875
876
data->glDisable(GL_TEXTURE_2D);
877
878
879
880
return 0;
}
static void
881
GLES_RenderPresent(SDL_Renderer * renderer)
882
883
884
885
886
887
888
889
890
891
892
893
894
895
{
SDL_GL_SwapWindow(renderer->window);
}
static void
GLES_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
if (!data) {
return;
}
if (data->texture) {
896
glDeleteTextures(1, &data->texture);
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
}
if (data->pixels) {
SDL_free(data->pixels);
}
SDL_FreeDirtyRects(&data->dirty);
SDL_free(data);
texture->driverdata = NULL;
}
static void
GLES_DestroyRenderer(SDL_Renderer * renderer)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
if (data) {
if (data->context) {
SDL_GL_DeleteContext(data->context);
}
SDL_free(data);
}
SDL_free(renderer);
}
920
#endif /* SDL_VIDEO_RENDER_OGL_ES */
921
922
/* vi: set ts=4 sw=4 expandtab: */