This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_renderer_gles.c
902 lines (773 loc) · 27.2 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
36
#ifdef __QNXNTO__
/* Empty function stub to get OpenGL ES 1.0 support without */
/* OpenGL ES extension GL_OES_draw_texture_supported */
37
38
GL_API void GL_APIENTRY
glDrawTexiOES(GLint x, GLint y, GLint z, GLint width, GLint height)
39
{
40
return;
41
42
43
44
}
#endif /* __QNXNTO__ */
45
46
47
48
49
50
51
52
53
/* 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,
54
55
SDL_Texture * texture, void **pixels,
int *pitch);
56
static int GLES_SetTexturePalette(SDL_Renderer * renderer,
57
58
59
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
60
static int GLES_GetTexturePalette(SDL_Renderer * renderer,
61
62
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
63
static int GLES_SetTextureColorMod(SDL_Renderer * renderer,
64
SDL_Texture * texture);
65
static int GLES_SetTextureAlphaMod(SDL_Renderer * renderer,
66
SDL_Texture * texture);
67
static int GLES_SetTextureBlendMode(SDL_Renderer * renderer,
68
SDL_Texture * texture);
69
static int GLES_SetTextureScaleMode(SDL_Renderer * renderer,
70
SDL_Texture * texture);
71
static int GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
72
73
const SDL_Rect * rect, const void *pixels,
int pitch);
74
static int GLES_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
75
76
77
78
const SDL_Rect * rect, int markDirty,
void **pixels, int *pitch);
static void GLES_UnlockTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
79
static void GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
80
int numrects, const SDL_Rect * rects);
81
82
83
84
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);
85
static int GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
86
87
const SDL_Rect * srcrect,
const SDL_Rect * dstrect);
88
static void GLES_RenderPresent(SDL_Renderer * renderer);
89
90
static void GLES_DestroyTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
91
92
93
94
95
96
97
98
99
100
101
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),
102
103
(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK |
SDL_BLENDMODE_BLEND | SDL_BLENDMODE_ADD | SDL_BLENDMODE_MOD),
104
105
(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |
SDL_TEXTURESCALEMODE_SLOW), 2,
106
{
107
108
/* OpenGL ES 1.x supported formats list */
SDL_PIXELFORMAT_BGR24,
109
SDL_PIXELFORMAT_ABGR8888},
110
0,
111
112
113
114
115
116
117
118
0}
};
typedef struct
{
SDL_GLContext context;
SDL_bool updateSize;
int blendMode;
119
120
121
122
#ifndef APIENTRY
#define APIENTRY
#endif
123
124
125
126
127
128
129
130
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
131
132
133
134
135
136
137
138
139
140
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
} 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)
{
184
185
#define SDL_PROC(ret,func,params) \
186
data->func = func;
187
188
189
#include "SDL_glesfuncs.h"
#undef SDL_PROC
190
191
192
193
194
195
196
197
198
199
200
201
202
203
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)
{
204
205
206
207
208
209
210
211
212
213
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
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;
243
244
renderer->RenderPoint = GLES_RenderPoint;
renderer->RenderLine = GLES_RenderLine;
245
246
247
248
249
250
251
252
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;
253
254
255
256
renderer->info.flags =
(SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED);
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
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;
}
}
287
288
289
290
291
292
293
294
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;
}
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
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;
}
310
311
static int
GLES_ActivateRenderer(SDL_Renderer * renderer)
312
{
313
314
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
315
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
316
317
318
319
320
321
322
323
324
325
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);
326
327
data->glOrthof(0.0, (GLfloat) window->w, (GLfloat) window->h, 0.0,
0.0, 1.0);
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
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
354
GLES_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
355
356
357
358
359
360
361
362
{
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;
363
364
365
switch (texture->format) {
case SDL_PIXELFORMAT_BGR24:
366
367
368
369
internalFormat = GL_RGB;
format = GL_RGB;
type = GL_UNSIGNED_BYTE;
break;
370
case SDL_PIXELFORMAT_ABGR8888:
371
372
373
374
internalFormat = GL_RGBA;
format = GL_RGBA;
type = GL_UNSIGNED_BYTE;
break;
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
/*
These formats would be supported if SDL had the necessary pixel formats
case SDL_PIXELFORMAT_BGR565:
internalFormat = GL_RGB;
format = GL_RGB;
type = GL_UNSIGNED_SHORT_5_6_5;
break;
case SDL_PIXELFORMAT_ABGR5551:
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;
392
*/
393
394
395
396
397
398
default:
SDL_SetError("Unsupported texture format");
return -1;
}
data = (GLES_TextureData *) SDL_calloc(1, sizeof(*data));
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
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();
417
renderdata->glEnable(GL_TEXTURE_2D);
418
renderdata->glGenTextures(1, &data->texture);
419
420
421
422
423
424
425
426
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;
427
428
429
430
431
432
433
434
435
436
437
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);
438
439
440
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, NULL);
441
renderdata->glDisable(GL_TEXTURE_2D);
442
443
444
445
446
447
448
449
450
451
452
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,
453
void **pixels, int *pitch)
454
455
456
457
458
459
460
461
462
463
{
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,
464
const SDL_Color * colors, int firstcolor, int ncolors)
465
{
466
SDL_SetError("OpenGL ES does not support paletted textures");
467
468
469
470
471
return -1;
}
static int
GLES_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
472
SDL_Color * colors, int firstcolor, int ncolors)
473
{
474
SDL_SetError("OpenGL ES does not support paletted textures");
475
476
477
478
479
480
481
return -1;
}
static void
SetupTextureUpdate(GLES_RenderData * renderdata, SDL_Texture * texture,
int pitch)
{
482
483
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
renderdata->glBindTexture(data->type, data->texture);
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
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) {
503
504
505
506
507
case SDL_BLENDMODE_NONE:
case SDL_BLENDMODE_MASK:
case SDL_BLENDMODE_BLEND:
case SDL_BLENDMODE_ADD:
case SDL_BLENDMODE_MOD:
508
509
510
return 0;
default:
SDL_Unsupported();
511
texture->blendMode = SDL_BLENDMODE_NONE;
512
513
514
515
516
517
518
519
520
521
522
523
524
525
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();
526
texture->scaleMode = SDL_TEXTURESCALEMODE_SLOW;
527
528
529
530
531
532
533
534
535
return -1;
default:
SDL_Unsupported();
texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
return -1;
}
}
static int
536
537
GLES_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
538
539
540
541
542
{
GLES_RenderData *renderdata = (GLES_RenderData *) renderer->driverdata;
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
GLenum result;
543
renderdata->glGetError();
544
545
renderdata->glEnable(data->type);
SetupTextureUpdate(renderdata, texture, pitch);
546
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
547
548
rect->h, data->format, data->formattype,
pixels);
549
renderdata->glDisable(data->type);
550
551
552
553
554
555
556
557
558
559
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,
560
561
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
{
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
582
583
GLES_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
int numrects, const SDL_Rect * rects)
584
585
586
587
588
589
590
591
592
{
GLES_TextureData *data = (GLES_TextureData *) texture->driverdata;
int i;
for (i = 0; i < numrects; ++i) {
SDL_AddDirtyRect(&data->dirty, &rects[i]);
}
}
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
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;
}
}
623
static int
624
GLES_RenderPoint(SDL_Renderer * renderer, int x, int y)
625
{
626
627
628
629
630
631
632
633
634
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);
635
636
637
638
639
640
641
642
643
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);
644
645
data->glDisable(GL_BLEND);
646
647
return 0;
}
648
649
650
651
static int
GLES_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
{
652
653
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
654
GLES_SetBlendMode(data, renderer->blendMode);
655
656
657
658
659
660
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
661
662
663
664
665
GLshort vertices[4];
vertices[0] = x1;
vertices[1] = y1;
vertices[2] = x2;
vertices[3] = y2;
666
667
668
669
670
data->glVertexPointer(2, GL_SHORT, 0, vertices);
data->glEnableClientState(GL_VERTEX_ARRAY);
data->glDrawArrays(GL_LINES, 0, 2);
data->glDisableClientState(GL_VERTEX_ARRAY);
671
672
673
data->glDisable(GL_BLEND);
674
675
return 0;
}
676
677
678
679
680
static int
GLES_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
{
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
681
682
GLES_SetBlendMode(data, renderer->blendMode);
683
684
685
686
687
data->glColor4f((GLfloat) renderer->r * inv255f,
(GLfloat) renderer->g * inv255f,
(GLfloat) renderer->b * inv255f,
(GLfloat) renderer->a * inv255f);
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
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);
708
709
710
data->glDisable(GL_BLEND);
711
return 0;
712
713
714
715
}
static int
GLES_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
716
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
717
{
718
719
720
721
722
GLES_RenderData *data = (GLES_RenderData *) renderer->driverdata;
GLES_TextureData *texturedata = (GLES_TextureData *) texture->driverdata;
int minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
723
724
725
726
int i;
void *temp_buffer; /* used for reformatting dirty rect pixels */
void *temp_ptr;
727
728
data->glEnable(GL_TEXTURE_2D);
729
730
731
732
733
734
735
if (texturedata->dirty.list) {
SDL_DirtyRect *dirty;
void *pixels;
int bpp = SDL_BYTESPERPIXEL(texture->format);
int pitch = texturedata->pitch;
SetupTextureUpdate(data, texture, pitch);
736
737
738
739
data->glBindTexture(texturedata->type, texturedata->texture);
for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) {
SDL_Rect *rect = &dirty->rect;
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
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;
}
757
758
759
data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y,
rect->w, rect->h, texturedata->format,
texturedata->formattype, temp_buffer);
760
761
762
SDL_free(temp_buffer);
763
764
765
}
SDL_ClearDirtyRects(&texturedata->dirty);
}
766
767
data->glBindTexture(texturedata->type, texturedata->texture);
768
769
770
771
772
773
774
775
776
777
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);
}
778
GLES_SetBlendMode(data, texture->blendMode);
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
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
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);
851
852
data->glDisableClientState(GL_TEXTURE_COORD_ARRAY);
data->glDisableClientState(GL_VERTEX_ARRAY);
853
854
}
855
856
data->glDisable(GL_TEXTURE_2D);
857
858
859
860
return 0;
}
static void
861
GLES_RenderPresent(SDL_Renderer * renderer)
862
863
864
865
866
867
868
869
870
871
872
873
874
875
{
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) {
876
glDeleteTextures(1, &data->texture);
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
}
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);
}
900
#endif /* SDL_VIDEO_RENDER_OGL_ES */
901
902
/* vi: set ts=4 sw=4 expandtab: */