This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_renderer_gl.c
965 lines (877 loc) · 30.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
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"
24
#if SDL_VIDEO_RENDER_OGL
25
26
27
28
29
30
31
#include "SDL_video.h"
#include "SDL_opengl.h"
#include "SDL_sysvideo.h"
#include "SDL_pixels_c.h"
#include "SDL_rect_c.h"
#include "SDL_yuv_sw_c.h"
32
33
34
/* OpenGL renderer implementation */
35
36
37
38
/* Details on optimizing the texture path on Mac OS X:
http://developer.apple.com/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_texturedata/chapter_10_section_2.html
*/
39
40
static const float inv255f = 1.0f / 255.0f;
41
static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
42
static int GL_ActivateRenderer(SDL_Renderer * renderer);
43
static int GL_DisplayModeChanged(SDL_Renderer * renderer);
44
static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
45
46
47
static int GL_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
48
49
50
51
52
53
54
static int GL_SetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
static int GL_GetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
55
56
57
58
59
60
61
62
static int GL_SetTextureColorMod(SDL_Renderer * renderer,
SDL_Texture * texture);
static int GL_SetTextureAlphaMod(SDL_Renderer * renderer,
SDL_Texture * texture);
static int GL_SetTextureBlendMode(SDL_Renderer * renderer,
SDL_Texture * texture);
static int GL_SetTextureScaleMode(SDL_Renderer * renderer,
SDL_Texture * texture);
63
64
65
66
static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels,
int pitch);
static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
67
68
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch);
69
70
71
static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
int numrects, const SDL_Rect * rects);
72
73
static int GL_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
Uint8 a, const SDL_Rect * rect);
74
static int GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
75
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
76
77
78
79
80
81
82
83
84
static void GL_RenderPresent(SDL_Renderer * renderer);
static void GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void GL_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver GL_RenderDriver = {
GL_CreateRenderer,
{
"opengl",
85
86
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD |
SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
87
88
(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
SDL_TEXTUREMODULATE_ALPHA),
89
90
91
92
93
(SDL_TEXTUREBLENDMODE_NONE | SDL_TEXTUREBLENDMODE_MASK |
SDL_TEXTUREBLENDMODE_BLEND | SDL_TEXTUREBLENDMODE_ADD |
SDL_TEXTUREBLENDMODE_MOD),
(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |
SDL_TEXTURESCALEMODE_SLOW),
94
16,
95
{
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
SDL_PIXELFORMAT_INDEX1LSB,
SDL_PIXELFORMAT_INDEX1MSB,
SDL_PIXELFORMAT_INDEX8,
SDL_PIXELFORMAT_RGB332,
SDL_PIXELFORMAT_RGB444,
SDL_PIXELFORMAT_RGB555,
SDL_PIXELFORMAT_ARGB4444,
SDL_PIXELFORMAT_ARGB1555,
SDL_PIXELFORMAT_RGB565,
SDL_PIXELFORMAT_RGB24,
SDL_PIXELFORMAT_BGR24,
SDL_PIXELFORMAT_RGB888,
SDL_PIXELFORMAT_BGR888,
SDL_PIXELFORMAT_ARGB8888,
SDL_PIXELFORMAT_ABGR8888,
SDL_PIXELFORMAT_ARGB2101010},
112
113
114
115
116
117
118
0,
0}
};
typedef struct
{
SDL_GLContext context;
119
SDL_bool updateSize;
120
SDL_bool GL_ARB_texture_rectangle_supported;
121
SDL_bool GL_EXT_paletted_texture_supported;
122
123
124
125
126
127
128
int blendMode;
int scaleMode;
/* OpenGL functions */
#define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
#include "SDL_glfuncs.h"
#undef SDL_PROC
129
130
PFNGLCOLORTABLEEXTPROC glColorTableEXT;
131
132
void (*glTextureRangeAPPLE) (GLenum target, GLsizei length,
const GLvoid * pointer);
133
134
135
136
137
} GL_RenderData;
typedef struct
{
GLuint texture;
138
GLenum type;
139
140
GLfloat texw;
GLfloat texh;
141
142
GLenum format;
GLenum formattype;
143
Uint8 *palette;
144
145
void *pixels;
int pitch;
146
SDL_DirtyRectList dirty;
147
148
149
} GL_TextureData;
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
static void
GL_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;
case GL_TABLE_TOO_LARGE:
error = "GL_TABLE_TOO_LARGE";
break;
default:
error = "UNKNOWN";
break;
}
SDL_SetError("%s: %s", prefix, error);
}
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
static int
GL_LoadFunctions(GL_RenderData * data)
{
#if defined(__QNXNTO__) && (_NTO_VERSION < 630)
#define __SDL_NOGETPROCADDR__
#elif defined(__MINT__)
#define __SDL_NOGETPROCADDR__
#endif
#ifdef __SDL_NOGETPROCADDR__
#define SDL_PROC(ret,func,params) data->func=func;
#else
#define SDL_PROC(ret,func,params) \
do { \
data->func = SDL_GL_GetProcAddress(#func); \
if ( ! data->func ) { \
SDL_SetError("Couldn't load GL function %s: %s\n", #func, SDL_GetError()); \
return -1; \
} \
} while ( 0 );
#endif /* __SDL_NOGETPROCADDR__ */
#include "SDL_glfuncs.h"
#undef SDL_PROC
return 0;
}
213
214
215
void
GL_AddRenderDriver(_THIS)
{
216
if (_this->GL_CreateContext) {
217
218
219
220
221
222
223
224
225
SDL_AddRenderDriver(0, &GL_RenderDriver);
}
}
SDL_Renderer *
GL_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_Renderer *renderer;
GL_RenderData *data;
226
GLint value;
227
int doublebuffer;
228
229
230
231
232
233
234
/* Render directly to the window, unless we're compositing */
#ifndef __MACOSX__
if (flags & SDL_RENDERER_SINGLEBUFFER) {
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);
}
#endif
235
if (!(window->flags & SDL_WINDOW_OPENGL)) {
236
if (SDL_RecreateWindow(window, window->flags | SDL_WINDOW_OPENGL) < 0) {
237
238
return NULL;
}
239
240
}
241
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
242
243
244
245
246
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
247
data = (GL_RenderData *) SDL_calloc(1, sizeof(*data));
248
249
250
251
252
253
if (!data) {
GL_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
254
renderer->ActivateRenderer = GL_ActivateRenderer;
255
renderer->DisplayModeChanged = GL_DisplayModeChanged;
256
renderer->CreateTexture = GL_CreateTexture;
257
renderer->QueryTexturePixels = GL_QueryTexturePixels;
258
259
renderer->SetTexturePalette = GL_SetTexturePalette;
renderer->GetTexturePalette = GL_GetTexturePalette;
260
261
262
263
renderer->SetTextureColorMod = GL_SetTextureColorMod;
renderer->SetTextureAlphaMod = GL_SetTextureAlphaMod;
renderer->SetTextureBlendMode = GL_SetTextureBlendMode;
renderer->SetTextureScaleMode = GL_SetTextureScaleMode;
264
265
266
267
268
269
270
271
272
273
274
275
276
277
renderer->UpdateTexture = GL_UpdateTexture;
renderer->LockTexture = GL_LockTexture;
renderer->UnlockTexture = GL_UnlockTexture;
renderer->DirtyTexture = GL_DirtyTexture;
renderer->RenderFill = GL_RenderFill;
renderer->RenderCopy = GL_RenderCopy;
renderer->RenderPresent = GL_RenderPresent;
renderer->DestroyTexture = GL_DestroyTexture;
renderer->DestroyRenderer = GL_DestroyRenderer;
renderer->info = GL_RenderDriver.info;
renderer->window = window->id;
renderer->driverdata = data;
renderer->info.flags =
278
(SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED);
279
280
281
282
283
284
if (GL_LoadFunctions(data) < 0) {
GL_DestroyRenderer(renderer);
return NULL;
}
285
286
287
288
289
290
291
292
293
294
data->context = SDL_GL_CreateContext(window->id);
if (!data->context) {
GL_DestroyRenderer(renderer);
return NULL;
}
if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
GL_DestroyRenderer(renderer);
return NULL;
}
295
if (flags & SDL_RENDERER_PRESENTVSYNC) {
296
297
298
299
300
SDL_GL_SetSwapInterval(1);
} else {
SDL_GL_SetSwapInterval(0);
}
if (SDL_GL_GetSwapInterval() > 0) {
301
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
302
303
}
304
305
306
307
308
309
if (SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &doublebuffer) == 0) {
if (!doublebuffer) {
renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER;
}
}
310
311
312
313
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;
314
315
316
317
318
if (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle")
|| SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle")) {
data->GL_ARB_texture_rectangle_supported = SDL_TRUE;
}
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
if (SDL_GL_ExtensionSupported("GL_EXT_paletted_texture")) {
data->GL_EXT_paletted_texture_supported = SDL_TRUE;
data->glColorTableEXT =
(PFNGLCOLORTABLEEXTPROC) SDL_GL_GetProcAddress("glColorTableEXT");
} else {
/* Don't advertise support for 8-bit indexed texture format */
Uint32 i, j;
SDL_RendererInfo *info = &renderer->info;
for (i = 0, j = 0; i < info->num_texture_formats; ++i) {
if (info->texture_formats[i] != SDL_PIXELFORMAT_INDEX8) {
info->texture_formats[j++] = info->texture_formats[i];
}
}
--info->num_texture_formats;
}
334
335
336
337
338
if (SDL_GL_ExtensionSupported("GL_APPLE_texture_range")) {
data->glTextureRangeAPPLE =
(void (*)(GLenum, GLsizei, const GLvoid *))
SDL_GL_GetProcAddress("glTextureRangeAPPLE");
}
339
340
/* Set up parameters for rendering */
341
342
343
344
data->blendMode = -1;
data->scaleMode = -1;
data->glDisable(GL_DEPTH_TEST);
data->glDisable(GL_CULL_FACE);
345
if (data->GL_ARB_texture_rectangle_supported) {
346
data->glEnable(GL_TEXTURE_RECTANGLE_ARB);
347
} else {
348
data->glEnable(GL_TEXTURE_2D);
349
}
350
data->updateSize = SDL_TRUE;
351
352
353
354
return renderer;
}
355
356
357
358
359
360
static int
GL_ActivateRenderer(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
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);
data->glOrtho(0.0, (GLdouble) window->w, (GLdouble) window->h, 0.0,
0.0, 1.0);
data->updateSize = SDL_FALSE;
}
return 0;
}
static int
GL_DisplayModeChanged(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
data->updateSize = SDL_TRUE;
return 0;
384
385
}
386
387
388
389
390
391
392
393
394
395
396
static __inline__ int
power_of_2(int input)
{
int value = 1;
while (value < input) {
value <<= 1;
}
return value;
}
397
398
399
400
401
402
static int
GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
GL_TextureData *data;
403
404
GLint internalFormat;
GLenum format, type;
405
int texture_w, texture_h;
406
GLenum result;
407
408
switch (texture->format) {
409
410
case SDL_PIXELFORMAT_INDEX1LSB:
case SDL_PIXELFORMAT_INDEX1MSB:
411
412
413
414
internalFormat = GL_RGB;
format = GL_COLOR_INDEX;
type = GL_BITMAP;
break;
415
case SDL_PIXELFORMAT_INDEX8:
416
417
418
419
420
if (!renderdata->GL_EXT_paletted_texture_supported) {
SDL_SetError("Unsupported texture format");
return -1;
}
internalFormat = GL_COLOR_INDEX8_EXT;
421
422
423
format = GL_COLOR_INDEX;
type = GL_UNSIGNED_BYTE;
break;
424
case SDL_PIXELFORMAT_RGB332:
425
426
427
428
internalFormat = GL_R3_G3_B2;
format = GL_RGB;
type = GL_UNSIGNED_BYTE_3_3_2;
break;
429
case SDL_PIXELFORMAT_RGB444:
430
431
432
433
internalFormat = GL_RGB4;
format = GL_RGB;
type = GL_UNSIGNED_SHORT_4_4_4_4;
break;
434
case SDL_PIXELFORMAT_RGB555:
435
436
437
438
internalFormat = GL_RGB5;
format = GL_RGB;
type = GL_UNSIGNED_SHORT_5_5_5_1;
break;
439
case SDL_PIXELFORMAT_ARGB4444:
440
441
442
443
internalFormat = GL_RGBA4;
format = GL_BGRA;
type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
break;
444
case SDL_PIXELFORMAT_ARGB1555:
445
446
447
448
internalFormat = GL_RGB5_A1;
format = GL_BGRA;
type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
break;
449
case SDL_PIXELFORMAT_RGB565:
450
451
452
453
internalFormat = GL_RGB8;
format = GL_RGB;
type = GL_UNSIGNED_SHORT_5_6_5;
break;
454
case SDL_PIXELFORMAT_RGB24:
455
456
457
458
internalFormat = GL_RGB8;
format = GL_RGB;
type = GL_UNSIGNED_BYTE;
break;
459
case SDL_PIXELFORMAT_RGB888:
460
461
462
463
464
#ifdef __MACOSX__
internalFormat = GL_RGBA;
format = GL_BGRA;
type = GL_UNSIGNED_INT_8_8_8_8_REV;
#else
465
internalFormat = GL_RGB8;
466
467
format = GL_BGRA;
type = GL_UNSIGNED_BYTE;
468
#endif
469
break;
470
case SDL_PIXELFORMAT_BGR24:
471
472
473
474
internalFormat = GL_RGB8;
format = GL_BGR;
type = GL_UNSIGNED_BYTE;
break;
475
case SDL_PIXELFORMAT_BGR888:
476
internalFormat = GL_RGB8;
477
478
format = GL_RGBA;
type = GL_UNSIGNED_BYTE;
479
break;
480
case SDL_PIXELFORMAT_ARGB8888:
481
482
483
484
485
#ifdef __MACOSX__
internalFormat = GL_RGBA;
format = GL_BGRA;
type = GL_UNSIGNED_INT_8_8_8_8_REV;
#else
486
487
internalFormat = GL_RGBA8;
format = GL_BGRA;
488
type = GL_UNSIGNED_BYTE;
489
#endif
490
break;
491
case SDL_PIXELFORMAT_ABGR8888:
492
493
internalFormat = GL_RGBA8;
format = GL_RGBA;
494
type = GL_UNSIGNED_BYTE;
495
break;
496
case SDL_PIXELFORMAT_ARGB2101010:
497
498
499
500
501
502
503
504
internalFormat = GL_RGB10_A2;
format = GL_BGRA;
type = GL_UNSIGNED_INT_2_10_10_10_REV;
break;
default:
SDL_SetError("Unsupported texture format");
return -1;
}
505
506
data = (GL_TextureData *) SDL_calloc(1, sizeof(*data));
507
508
509
510
511
if (!data) {
SDL_OutOfMemory();
return -1;
}
512
513
514
515
516
517
518
519
520
521
if (texture->format == SDL_PIXELFORMAT_INDEX8) {
data->palette = (Uint8 *) SDL_malloc(3 * 256 * sizeof(Uint8));
if (!data->palette) {
SDL_OutOfMemory();
SDL_free(data);
return -1;
}
SDL_memset(data->palette, 0xFF, 3 * 256 * sizeof(Uint8));
}
522
523
524
525
526
527
528
529
530
531
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;
}
}
532
533
texture->driverdata = data;
534
535
renderdata->glGetError();
renderdata->glGenTextures(1, &data->texture);
536
537
538
539
540
541
542
543
544
545
546
547
548
if (renderdata->GL_ARB_texture_rectangle_supported) {
data->type = GL_TEXTURE_RECTANGLE_ARB;
texture_w = texture->w;
texture_h = texture->h;
data->texw = (GLfloat) texture->w;
data->texh = (GLfloat) texture->h;
} else {
data->type = GL_TEXTURE_2D;
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;
}
549
550
data->format = format;
data->formattype = type;
551
renderdata->glBindTexture(data->type, data->texture);
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
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);
#ifdef __MACOSX__
#ifndef GL_TEXTURE_STORAGE_HINT_APPLE
#define GL_TEXTURE_STORAGE_HINT_APPLE 0x85BC
#endif
#ifndef STORAGE_CACHED_APPLE
#define STORAGE_CACHED_APPLE 0x85BE
#endif
#ifndef STORAGE_SHARED_APPLE
#define STORAGE_SHARED_APPLE 0x85BF
#endif
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
GL_STORAGE_SHARED_APPLE);
} else {
renderdata->glTexParameteri(data->type, GL_TEXTURE_STORAGE_HINT_APPLE,
GL_STORAGE_CACHED_APPLE);
}
if (data->pixels && internalFormat == GL_RGBA && format == GL_BGRA
&& type == GL_UNSIGNED_INT_8_8_8_8_REV && data->pixels) {
579
580
581
582
583
if (renderdata->glTextureRangeAPPLE) {
renderdata->glTextureRangeAPPLE(data->type,
texture->h * data->pitch,
data->pixels);
}
584
585
586
587
588
589
590
591
592
renderdata->glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, data->pixels);
} else
#endif
{
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, NULL);
}
593
result = renderdata->glGetError();
594
595
596
597
if (result != GL_NO_ERROR) {
GL_SetError("glTexImage2D()", result);
return -1;
}
598
599
600
return 0;
}
601
602
603
604
605
606
607
608
609
610
611
static int
GL_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
void **pixels, int *pitch)
{
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
*pixels = data->pixels;
*pitch = data->pitch;
return 0;
}
612
613
614
615
616
617
static int
GL_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Color * colors, int firstcolor, int ncolors)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
618
Uint8 *palette;
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
if (!data->palette) {
SDL_SetError("Texture doesn't have a palette");
return -1;
}
palette = data->palette + firstcolor * 3;
while (ncolors--) {
*palette++ = colors->r;
*palette++ = colors->g;
*palette++ = colors->b;
++colors;
}
renderdata->glBindTexture(data->type, data->texture);
renderdata->glColorTableEXT(data->type, GL_RGB8, 256, GL_RGB,
GL_UNSIGNED_BYTE, data->palette);
634
635
636
637
638
639
640
return 0;
}
static int
GL_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Color * colors, int firstcolor, int ncolors)
{
641
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
642
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
643
Uint8 *palette;
644
645
646
647
648
649
650
651
652
653
654
655
656
if (!data->palette) {
SDL_SetError("Texture doesn't have a palette");
return -1;
}
palette = data->palette + firstcolor * 3;
while (ncolors--) {
colors->r = *palette++;
colors->g = *palette++;
colors->b = *palette++;
colors->unused = SDL_ALPHA_OPAQUE;
++colors;
}
657
658
659
return 0;
}
660
static void
661
662
SetupTextureUpdate(GL_RenderData * renderdata, SDL_Texture * texture,
int pitch)
663
{
664
if (texture->format == SDL_PIXELFORMAT_INDEX1LSB) {
665
renderdata->glPixelStorei(GL_UNPACK_LSB_FIRST, 1);
666
} else if (texture->format == SDL_PIXELFORMAT_INDEX1MSB) {
667
renderdata->glPixelStorei(GL_UNPACK_LSB_FIRST, 0);
668
}
669
670
671
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH,
pitch / SDL_BYTESPERPIXEL(texture->format));
672
673
}
674
675
676
static int
GL_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
677
return 0;
678
679
680
681
682
}
static int
GL_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
683
return 0;
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
}
static int
GL_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->blendMode) {
case SDL_TEXTUREBLENDMODE_NONE:
case SDL_TEXTUREBLENDMODE_MASK:
case SDL_TEXTUREBLENDMODE_BLEND:
case SDL_TEXTUREBLENDMODE_ADD:
case SDL_TEXTUREBLENDMODE_MOD:
return 0;
default:
SDL_Unsupported();
texture->blendMode = SDL_TEXTUREBLENDMODE_NONE;
return -1;
}
}
static int
GL_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();
texture->scaleMode = SDL_TEXTURESCALEMODE_SLOW;
return -1;
default:
SDL_Unsupported();
texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
return -1;
}
}
722
723
724
725
static int
GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
{
726
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
727
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
728
GLenum result;
729
730
731
732
733
734
735
736
renderdata->glGetError();
SetupTextureUpdate(renderdata, texture, pitch);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
rect->h, data->format, data->formattype,
pixels);
result = renderdata->glGetError();
737
738
739
740
if (result != GL_NO_ERROR) {
GL_SetError("glTexSubImage2D()", result);
return -1;
}
741
742
743
744
745
746
747
748
749
750
return 0;
}
static int
GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
{
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
751
752
if (markDirty) {
SDL_AddDirtyRect(&data->dirty, rect);
753
}
754
755
756
757
758
*pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = data->pitch;
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
return 0;
}
static void
GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
}
static void
GL_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, int numrects,
const SDL_Rect * rects)
{
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
int i;
for (i = 0; i < numrects; ++i) {
775
SDL_AddDirtyRect(&data->dirty, &rects[i]);
776
777
778
779
}
}
static int
780
781
GL_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 a,
const SDL_Rect * rect)
782
783
784
785
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
786
787
data->glClearColor((GLclampf) r * inv255f, (GLclampf) g * inv255f,
(GLclampf) b * inv255f, (GLclampf) a * inv255f);
788
789
790
data->glViewport(rect->x, window->h - rect->y, rect->w, rect->h);
data->glClear(GL_COLOR_BUFFER_BIT);
data->glViewport(0, 0, window->w, window->h);
791
792
793
794
795
return 0;
}
static int
GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
796
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
797
798
799
800
801
802
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
GL_TextureData *texturedata = (GL_TextureData *) texture->driverdata;
int minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
803
804
805
806
807
808
if (texturedata->dirty.count > 0) {
SDL_DirtyRect *dirty;
void *pixels;
int bpp = SDL_BYTESPERPIXEL(texture->format);
int pitch = texturedata->pitch;
809
810
811
812
813
814
815
816
817
818
819
#ifdef __MACOSX__
if (texture->format == SDL_PIXELFORMAT_RGB888) {
int i;
Uint8 *p = (Uint8 *) texturedata->pixels;
p += 3;
for (i = texture->h * pitch / 4; i--;) {
*p = 0xff;
p += 4;
}
}
#endif
820
821
SetupTextureUpdate(data, texture, pitch);
data->glBindTexture(texturedata->type, texturedata->texture);
822
823
824
825
826
for (dirty = texturedata->dirty.list; dirty; dirty = dirty->next) {
SDL_Rect *rect = &dirty->rect;
pixels =
(void *) ((Uint8 *) texturedata->pixels + rect->y * pitch +
rect->x * bpp);
827
828
829
data->glTexSubImage2D(texturedata->type, 0, rect->x, rect->y,
rect->w, rect->h, texturedata->format,
texturedata->formattype, pixels);
830
831
832
833
}
SDL_ClearDirtyRects(&texturedata->dirty);
}
834
835
836
837
838
839
minx = dstrect->x;
miny = dstrect->y;
maxx = dstrect->x + dstrect->w;
maxy = dstrect->y + dstrect->h;
minu = (GLfloat) srcrect->x / texture->w;
840
minu *= texturedata->texw;
841
maxu = (GLfloat) (srcrect->x + srcrect->w) / texture->w;
842
maxu *= texturedata->texw;
843
minv = (GLfloat) srcrect->y / texture->h;
844
minv *= texturedata->texh;
845
maxv = (GLfloat) (srcrect->y + srcrect->h) / texture->h;
846
maxv *= texturedata->texh;
847
848
849
data->glBindTexture(texturedata->type, texturedata->texture);
850
851
852
853
854
855
856
857
858
859
860
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);
}
if (texture->blendMode != data->blendMode) {
switch (texture->blendMode) {
861
case SDL_TEXTUREBLENDMODE_NONE:
862
863
864
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
data->glDisable(GL_BLEND);
break;
865
866
case SDL_TEXTUREBLENDMODE_MASK:
case SDL_TEXTUREBLENDMODE_BLEND:
867
868
869
870
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;
871
case SDL_TEXTUREBLENDMODE_ADD:
872
873
874
875
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFunc(GL_SRC_ALPHA, GL_ONE);
break;
876
case SDL_TEXTUREBLENDMODE_MOD:
877
878
879
880
881
data->glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
data->glEnable(GL_BLEND);
data->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
break;
}
882
data->blendMode = texture->blendMode;
883
884
}
885
886
if (texture->scaleMode != data->scaleMode) {
switch (texture->scaleMode) {
887
888
case SDL_TEXTURESCALEMODE_NONE:
case SDL_TEXTURESCALEMODE_FAST:
889
890
891
892
893
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
GL_NEAREST);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
break;
894
895
case SDL_TEXTURESCALEMODE_SLOW:
case SDL_TEXTURESCALEMODE_BEST:
896
897
898
899
900
901
data->glTexParameteri(texturedata->type, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
data->glTexParameteri(texturedata->type, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
break;
}
902
data->scaleMode = texture->scaleMode;
903
904
}
905
906
907
908
909
910
911
912
913
914
data->glBegin(GL_TRIANGLE_STRIP);
data->glTexCoord2f(minu, minv);
data->glVertex2i(minx, miny);
data->glTexCoord2f(maxu, minv);
data->glVertex2i(maxx, miny);
data->glTexCoord2f(minu, maxv);
data->glVertex2i(minx, maxy);
data->glTexCoord2f(maxu, maxv);
data->glVertex2i(maxx, maxy);
data->glEnd();
915
916
917
918
919
920
921
922
923
924
925
926
927
return 0;
}
static void
GL_RenderPresent(SDL_Renderer * renderer)
{
SDL_GL_SwapWindow(renderer->window);
}
static void
GL_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
928
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
929
930
931
932
933
934
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
if (!data) {
return;
}
if (data->texture) {
935
renderdata->glDeleteTextures(1, &data->texture);
936
}
937
938
939
if (data->palette) {
SDL_free(data->palette);
}
940
941
if (data->pixels) {
SDL_free(data->pixels);
942
}
943
SDL_FreeDirtyRects(&data->dirty);
944
945
946
947
SDL_free(data);
texture->driverdata = NULL;
}
948
static void
949
950
951
952
953
GL_DestroyRenderer(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
if (data) {
954
955
956
if (data->context) {
SDL_GL_MakeCurrent(0, NULL);
SDL_GL_DeleteContext(data->context);
957
958
959
960
961
962
}
SDL_free(data);
}
SDL_free(renderer);
}
963
#endif /* SDL_VIDEO_RENDER_OGL */
964
965
/* vi: set ts=4 sw=4 expandtab: */