This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_renderer_gl.c
1456 lines (1311 loc) · 47.7 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
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
35
36
#ifdef __MACOSX__
#include <OpenGL/OpenGL.h>
#endif
37
38
39
/* OpenGL renderer implementation */
40
41
42
43
/* 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
*/
44
45
46
47
/* !!! FIXME: this should go in a higher level than the GL renderer. */
static __inline__ int
bytes_per_pixel(const Uint32 format)
{
48
49
50
51
52
if (!SDL_ISPIXELFORMAT_FOURCC(format)) {
return SDL_BYTESPERPIXEL(format);
}
/* FOURCC format */
53
switch (format) {
54
55
56
57
58
59
60
61
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
case SDL_PIXELFORMAT_YUY2:
case SDL_PIXELFORMAT_UYVY:
case SDL_PIXELFORMAT_YVYU:
return 2;
default:
return 1; /* shouldn't ever hit this. */
62
63
64
65
}
}
66
67
static const float inv255f = 1.0f / 255.0f;
68
static SDL_Renderer *GL_CreateRenderer(SDL_Window * window, Uint32 flags);
69
static int GL_ActivateRenderer(SDL_Renderer * renderer);
70
static int GL_DisplayModeChanged(SDL_Renderer * renderer);
71
static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
72
73
74
static int GL_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
75
76
77
78
79
80
81
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);
82
83
84
85
86
87
88
89
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);
90
91
92
93
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,
94
95
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch);
96
97
98
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);
99
static int GL_RenderPoint(SDL_Renderer * renderer, int x, int y);
100
101
102
static int GL_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2,
int y2);
static int GL_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect);
103
static int GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
104
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
105
static int GL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
106
Uint32 pixel_format, void * pixels, int pitch);
107
static int GL_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
108
Uint32 pixel_format, const void * pixels, int pitch);
109
110
111
112
113
114
115
116
117
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",
118
119
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD |
SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED),
120
121
(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
SDL_TEXTUREMODULATE_ALPHA),
122
123
(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK |
SDL_BLENDMODE_BLEND | SDL_BLENDMODE_ADD | SDL_BLENDMODE_MOD),
124
125
(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST |
SDL_TEXTURESCALEMODE_SLOW),
126
15,
127
{
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
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,
143
SDL_PIXELFORMAT_ARGB2101010},
144
145
146
147
148
149
150
0,
0}
};
typedef struct
{
SDL_GLContext context;
151
SDL_bool updateSize;
152
SDL_bool GL_ARB_texture_rectangle_supported;
153
SDL_bool GL_EXT_paletted_texture_supported;
154
155
SDL_bool GL_APPLE_ycbcr_422_supported;
SDL_bool GL_MESA_ycbcr_texture_supported;
156
SDL_bool GL_ARB_fragment_program_supported;
157
158
159
160
161
162
163
int blendMode;
int scaleMode;
/* OpenGL functions */
#define SDL_PROC(ret,func,params) ret (APIENTRY *func) params;
#include "SDL_glfuncs.h"
#undef SDL_PROC
164
165
PFNGLCOLORTABLEEXTPROC glColorTableEXT;
166
167
void (*glTextureRangeAPPLE) (GLenum target, GLsizei length,
const GLvoid * pointer);
168
169
170
171
172
173
174
175
176
177
PFNGLGETPROGRAMIVARBPROC glGetProgramivARB;
PFNGLGETPROGRAMSTRINGARBPROC glGetProgramStringARB;
PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB;
PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB;
PFNGLGENPROGRAMSARBPROC glGenProgramsARB;
PFNGLBINDPROGRAMARBPROC glBindProgramARB;
PFNGLPROGRAMSTRINGARBPROC glProgramStringARB;
/* (optional) fragment programs */
178
GLuint fragment_program_mask;
179
GLuint fragment_program_UYVY;
180
181
182
183
184
} GL_RenderData;
typedef struct
{
GLuint texture;
185
GLuint shader;
186
GLenum type;
187
188
GLfloat texw;
GLfloat texh;
189
190
GLenum format;
GLenum formattype;
191
Uint8 *palette;
192
193
void *pixels;
int pitch;
194
SDL_DirtyRectList dirty;
195
int HACK_RYAN_FIXME;
196
197
198
} GL_TextureData;
199
200
201
202
203
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
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);
}
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
static int
GL_LoadFunctions(GL_RenderData * data)
{
#if defined(__QNXNTO__) && (_NTO_VERSION < 630)
#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;
}
260
261
262
263
264
SDL_Renderer *
GL_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_Renderer *renderer;
GL_RenderData *data;
265
GLint value;
266
int doublebuffer;
267
268
269
270
271
272
273
/* Render directly to the window, unless we're compositing */
#ifndef __MACOSX__
if (flags & SDL_RENDERER_SINGLEBUFFER) {
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);
}
#endif
274
if (!(window->flags & SDL_WINDOW_OPENGL)) {
275
if (SDL_RecreateWindow(window, window->flags | SDL_WINDOW_OPENGL) < 0) {
276
277
return NULL;
}
278
279
}
280
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
281
282
283
284
285
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
286
data = (GL_RenderData *) SDL_calloc(1, sizeof(*data));
287
288
289
290
291
292
if (!data) {
GL_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
293
renderer->ActivateRenderer = GL_ActivateRenderer;
294
renderer->DisplayModeChanged = GL_DisplayModeChanged;
295
renderer->CreateTexture = GL_CreateTexture;
296
renderer->QueryTexturePixels = GL_QueryTexturePixels;
297
298
renderer->SetTexturePalette = GL_SetTexturePalette;
renderer->GetTexturePalette = GL_GetTexturePalette;
299
300
301
302
renderer->SetTextureColorMod = GL_SetTextureColorMod;
renderer->SetTextureAlphaMod = GL_SetTextureAlphaMod;
renderer->SetTextureBlendMode = GL_SetTextureBlendMode;
renderer->SetTextureScaleMode = GL_SetTextureScaleMode;
303
304
305
306
renderer->UpdateTexture = GL_UpdateTexture;
renderer->LockTexture = GL_LockTexture;
renderer->UnlockTexture = GL_UnlockTexture;
renderer->DirtyTexture = GL_DirtyTexture;
307
renderer->RenderPoint = GL_RenderPoint;
308
renderer->RenderLine = GL_RenderLine;
309
310
renderer->RenderFill = GL_RenderFill;
renderer->RenderCopy = GL_RenderCopy;
311
312
renderer->RenderReadPixels = GL_RenderReadPixels;
renderer->RenderWritePixels = GL_RenderWritePixels;
313
314
315
316
317
318
319
320
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 =
321
(SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED);
322
323
324
325
326
327
if (GL_LoadFunctions(data) < 0) {
GL_DestroyRenderer(renderer);
return NULL;
}
328
329
330
331
332
333
334
335
336
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;
}
337
338
339
#ifdef __MACOSX__
/* Enable multi-threaded rendering */
/* Disabled until Ryan finishes his VBO/PBO code...
340
341
CGLEnable(CGLGetCurrentContext(), kCGLCEMPEngine);
*/
342
343
#endif
344
if (flags & SDL_RENDERER_PRESENTVSYNC) {
345
346
347
348
349
SDL_GL_SetSwapInterval(1);
} else {
SDL_GL_SetSwapInterval(0);
}
if (SDL_GL_GetSwapInterval() > 0) {
350
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
351
352
}
353
354
355
356
357
358
if (SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &doublebuffer) == 0) {
if (!doublebuffer) {
renderer->info.flags |= SDL_RENDERER_SINGLEBUFFER;
}
}
359
360
361
362
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;
363
364
365
366
367
if (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle")
|| SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle")) {
data->GL_ARB_texture_rectangle_supported = SDL_TRUE;
}
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
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;
}
383
384
385
386
387
388
if (SDL_GL_ExtensionSupported("GL_APPLE_ycbcr_422")) {
data->GL_APPLE_ycbcr_422_supported = SDL_TRUE;
}
if (SDL_GL_ExtensionSupported("GL_MESA_ycbcr_texture")) {
data->GL_MESA_ycbcr_texture_supported = SDL_TRUE;
}
389
390
391
392
393
if (SDL_GL_ExtensionSupported("GL_APPLE_texture_range")) {
data->glTextureRangeAPPLE =
(void (*)(GLenum, GLsizei, const GLvoid *))
SDL_GL_GetProcAddress("glTextureRangeAPPLE");
}
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
/* we might use fragment programs for YUV data, etc. */
if (SDL_GL_ExtensionSupported("GL_ARB_fragment_program")) {
/* !!! FIXME: this doesn't check for errors. */
/* !!! FIXME: this should really reuse the glfuncs.h stuff. */
data->glGetProgramivARB = (PFNGLGETPROGRAMIVARBPROC)
SDL_GL_GetProcAddress("glGetProgramivARB");
data->glGetProgramStringARB = (PFNGLGETPROGRAMSTRINGARBPROC)
SDL_GL_GetProcAddress("glGetProgramStringARB");
data->glProgramLocalParameter4fvARB =
(PFNGLPROGRAMLOCALPARAMETER4FVARBPROC)
SDL_GL_GetProcAddress("glProgramLocalParameter4fvARB");
data->glDeleteProgramsARB = (PFNGLDELETEPROGRAMSARBPROC)
SDL_GL_GetProcAddress("glDeleteProgramsARB");
data->glGenProgramsARB = (PFNGLGENPROGRAMSARBPROC)
SDL_GL_GetProcAddress("glGenProgramsARB");
data->glBindProgramARB = (PFNGLBINDPROGRAMARBPROC)
SDL_GL_GetProcAddress("glBindProgramARB");
data->glProgramStringARB = (PFNGLPROGRAMSTRINGARBPROC)
SDL_GL_GetProcAddress("glProgramStringARB");
data->GL_ARB_fragment_program_supported = SDL_TRUE;
}
417
/* Set up parameters for rendering */
418
419
420
421
data->blendMode = -1;
data->scaleMode = -1;
data->glDisable(GL_DEPTH_TEST);
data->glDisable(GL_CULL_FACE);
422
423
/* This ended up causing video discrepancies between OpenGL and Direct3D */
/*data->glEnable(GL_LINE_SMOOTH);*/
424
if (data->GL_ARB_texture_rectangle_supported) {
425
data->glEnable(GL_TEXTURE_RECTANGLE_ARB);
426
} else {
427
data->glEnable(GL_TEXTURE_2D);
428
}
429
data->updateSize = SDL_TRUE;
430
431
432
433
return renderer;
}
434
435
436
437
438
439
static int
GL_ActivateRenderer(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
440
441
442
if (SDL_GL_MakeCurrent(window->id, data->context) < 0) {
return -1;
}
443
if (data->updateSize) {
444
445
446
447
448
data->glMatrixMode(GL_PROJECTION);
data->glLoadIdentity();
data->glMatrixMode(GL_MODELVIEW);
data->glLoadIdentity();
data->glViewport(0, 0, window->w, window->h);
449
450
data->glOrtho(0.0, (GLdouble) window->w,
(GLdouble) window->h, 0.0, 0.0, 1.0);
451
452
data->updateSize = SDL_FALSE;
}
453
454
455
456
457
458
459
460
return 0;
}
static int
GL_DisplayModeChanged(SDL_Renderer * renderer)
{
GL_RenderData *data = (GL_RenderData *) renderer->driverdata;
461
462
463
/* Rebind the context to the window area and update matrices */
data->updateSize = SDL_TRUE;
return GL_ActivateRenderer(renderer);
464
465
}
466
467
468
469
470
471
472
473
474
475
476
static __inline__ int
power_of_2(int input)
{
int value = 1;
while (value < input) {
value <<= 1;
}
return value;
}
477
478
//#define DEBUG_PROGRAM_COMPILE 1
479
480
481
482
483
484
485
486
static void
set_shader_error(GL_RenderData * data, const char *prefix)
{
GLint pos = 0;
const GLubyte *errstr;
data->glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &pos);
errstr = data->glGetString(GL_PROGRAM_ERROR_STRING_ARB);
487
SDL_SetError("%s: shader compile error at position %d: %s",
488
489
490
prefix, (int) pos, (const char *) errstr);
}
491
static GLuint
492
compile_shader(GL_RenderData * data, GLenum shader_type, const char *_code)
493
{
494
495
const int have_texture_rects = data->GL_ARB_texture_rectangle_supported;
const char *replacement = have_texture_rects ? "RECT" : "2D";
496
const size_t replacementlen = SDL_strlen(replacement);
497
const char *token = "%TEXTURETARGET%";
498
const size_t tokenlen = SDL_strlen(token);
499
500
501
502
503
504
505
506
507
508
509
510
511
char *code = NULL;
char *ptr = NULL;
GLuint program = 0;
/*
* The TEX instruction needs a different target depending on what we use.
* To handle this, we use "%TEXTURETARGET%" and replace the string before
* compiling the shader.
*/
code = SDL_strdup(_code);
if (code == NULL)
return 0;
512
for (ptr = SDL_strstr(code, token); ptr; ptr = SDL_strstr(ptr + 1, token)) {
513
514
515
SDL_memcpy(ptr, replacement, replacementlen);
SDL_memmove(ptr + replacementlen, ptr + tokenlen,
SDL_strlen(ptr + tokenlen) + 1);
516
517
}
518
#if DEBUG_PROGRAM_COMPILE
519
printf("compiling shader:\n%s\n\n", code);
520
521
#endif
522
data->glGetError(); /* flush any existing error state. */
523
524
525
data->glGenProgramsARB(1, &program);
data->glBindProgramARB(shader_type, program);
data->glProgramStringARB(shader_type, GL_PROGRAM_FORMAT_ASCII_ARB,
526
(GLsizei)SDL_strlen(code), code);
527
528
SDL_free(code);
529
530
if (data->glGetError() == GL_INVALID_OPERATION) {
531
532
533
534
535
536
#if DEBUG_PROGRAM_COMPILE
GLint pos = 0;
const GLubyte *errstr;
data->glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &pos);
errstr = data->glGetString(GL_PROGRAM_ERROR_STRING_ARB);
printf("program compile error at position %d: %s\n\n",
537
(int) pos, (const char *) errstr);
538
539
540
541
#endif
data->glBindProgramARB(shader_type, 0);
data->glDeleteProgramsARB(1, &program);
return 0;
542
}
543
544
545
546
return program;
}
547
548
549
550
551
552
553
554
555
556
557
558
559
/*
* Fragment program that implements mask semantics
*/
static const char *fragment_program_mask_source_code = "!!ARBfp1.0\n"
"OUTPUT output = result.color;\n"
"TEMP value;\n"
"TEX value, fragment.texcoord[0], texture[0], %TEXTURETARGET%;\n"
"MUL value, fragment.color, value;\n"
"SGE value.a, value.a, 0.001;\n"
"MOV output, value;\n"
"END";
560
561
562
563
564
565
566
567
568
569
570
571
/*
* Fragment program that renders from UYVY textures.
* The UYVY to RGB equasion is:
* R = 1.164(Y-16) + 1.596(Cr-128)
* G = 1.164(Y-16) - 0.813(Cr-128) - 0.391(Cb-128)
* B = 1.164(Y-16) + 2.018(Cb-128)
* Byte layout is Cb, Y1, Cr, Y2, stored in the R, G, B, A channels.
* 4 bytes == 2 pixels: Y1/Cb/Cr, Y2/Cb/Cr
*
* !!! FIXME: this ignores blendmodes, etc.
* !!! FIXME: this could be more efficient...use a dot product for green, etc.
*/
572
static const char *fragment_program_UYVY_source_code = "!!ARBfp1.0\n"
573
/* outputs... */
574
"OUTPUT outcolor = result.color;\n"
575
/* scratch registers... */
576
"TEMP uyvy;\n" "TEMP luminance;\n" "TEMP work;\n"
577
/* Halve the coordinates to grab the correct 32 bits for the fragment. */
578
"MUL work, fragment.texcoord, { 0.5, 1.0, 1.0, 1.0 };\n"
579
/* Sample the YUV texture. Cb, Y1, Cr, Y2, are stored in x, y, z, w. */
580
"TEX uyvy, work, texture[0], %TEXTURETARGET%;\n"
581
/* Do subtractions (128/255, 16/255, 128/255, 16/255) */
582
"SUB uyvy, uyvy, { 0.501960784313726, 0.06274509803922, 0.501960784313726, 0.06274509803922 };\n"
583
584
/* Choose the luminance component by texcoord. */
/* !!! FIXME: laziness wins out for now... just average Y1 and Y2. */
585
586
"ADD luminance, uyvy.yyyy, uyvy.wwww;\n"
"MUL luminance, luminance, { 0.5, 0.5, 0.5, 0.5 };\n"
587
/* Multiply luminance by its magic value. */
588
"MUL luminance, luminance, { 1.164, 1.164, 1.164, 1.164 };\n"
589
/* uyvy.xyzw becomes Cr/Cr/Cb/Cb, with multiplications. */
590
"MUL uyvy, uyvy.zzxx, { 1.596, -0.813, 2.018, -0.391 };\n"
591
/* Add luminance to Cr and Cb, store to RGB channels. */
592
"ADD work.rgb, luminance, uyvy;\n"
593
/* Do final addition for Green channel. (!!! FIXME: this should be a DPH?) */
594
"ADD work.g, work.g, uyvy.w;\n"
595
/* Make sure alpha channel is fully opaque. (!!! FIXME: blend modes!) */
596
"MOV work.a, { 1.0 };\n"
597
/* Store out the final fragment color... */
598
"MOV outcolor, work;\n"
599
/* ...and we're done! */
600
601
"END\n";
602
603
604
static __inline__ SDL_bool
convert_format(GL_RenderData *renderdata, Uint32 pixel_format,
GLint* internalFormat, GLenum* format, GLenum* type)
605
{
606
switch (pixel_format) {
607
608
case SDL_PIXELFORMAT_INDEX1LSB:
case SDL_PIXELFORMAT_INDEX1MSB:
609
610
611
*internalFormat = GL_RGB;
*format = GL_COLOR_INDEX;
*type = GL_BITMAP;
612
break;
613
case SDL_PIXELFORMAT_INDEX8:
614
if (!renderdata->GL_EXT_paletted_texture_supported) {
615
return SDL_FALSE;
616
}
617
618
619
*internalFormat = GL_COLOR_INDEX8_EXT;
*format = GL_COLOR_INDEX;
*type = GL_UNSIGNED_BYTE;
620
break;
621
case SDL_PIXELFORMAT_RGB332:
622
623
624
*internalFormat = GL_R3_G3_B2;
*format = GL_RGB;
*type = GL_UNSIGNED_BYTE_3_3_2;
625
break;
626
case SDL_PIXELFORMAT_RGB444:
627
628
629
*internalFormat = GL_RGB4;
*format = GL_RGB;
*type = GL_UNSIGNED_SHORT_4_4_4_4;
630
break;
631
case SDL_PIXELFORMAT_RGB555:
632
633
634
*internalFormat = GL_RGB5;
*format = GL_RGB;
*type = GL_UNSIGNED_SHORT_5_5_5_1;
635
break;
636
case SDL_PIXELFORMAT_ARGB4444:
637
638
639
*internalFormat = GL_RGBA4;
*format = GL_BGRA;
*type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
640
break;
641
case SDL_PIXELFORMAT_ARGB1555:
642
643
644
*internalFormat = GL_RGB5_A1;
*format = GL_BGRA;
*type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
645
break;
646
case SDL_PIXELFORMAT_RGB565:
647
648
649
*internalFormat = GL_RGB8;
*format = GL_RGB;
*type = GL_UNSIGNED_SHORT_5_6_5;
650
break;
651
case SDL_PIXELFORMAT_RGB24:
652
653
654
*internalFormat = GL_RGB8;
*format = GL_RGB;
*type = GL_UNSIGNED_BYTE;
655
break;
656
case SDL_PIXELFORMAT_RGB888:
657
658
659
*internalFormat = GL_RGB8;
*format = GL_BGRA;
*type = GL_UNSIGNED_BYTE;
660
break;
661
case SDL_PIXELFORMAT_BGR24:
662
663
664
*internalFormat = GL_RGB8;
*format = GL_BGR;
*type = GL_UNSIGNED_BYTE;
665
break;
666
case SDL_PIXELFORMAT_BGR888:
667
668
669
*internalFormat = GL_RGB8;
*format = GL_RGBA;
*type = GL_UNSIGNED_BYTE;
670
break;
671
case SDL_PIXELFORMAT_ARGB8888:
672
#ifdef __MACOSX__
673
674
675
*internalFormat = GL_RGBA;
*format = GL_BGRA;
*type = GL_UNSIGNED_INT_8_8_8_8_REV;
676
#else
677
678
679
*internalFormat = GL_RGBA8;
*format = GL_BGRA;
*type = GL_UNSIGNED_BYTE;
680
#endif
681
break;
682
case SDL_PIXELFORMAT_ABGR8888:
683
684
685
*internalFormat = GL_RGBA8;
*format = GL_RGBA;
*type = GL_UNSIGNED_BYTE;
686
break;
687
case SDL_PIXELFORMAT_ARGB2101010:
688
689
690
*internalFormat = GL_RGB10_A2;
*format = GL_BGRA;
*type = GL_UNSIGNED_INT_2_10_10_10_REV;
691
break;
692
case SDL_PIXELFORMAT_UYVY:
693
if (renderdata->GL_APPLE_ycbcr_422_supported) {
694
695
*internalFormat = GL_RGB;
*format = GL_YCBCR_422_APPLE;
696
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
697
*type = GL_UNSIGNED_SHORT_8_8_APPLE;
698
#else
699
*type = GL_UNSIGNED_SHORT_8_8_REV_APPLE;
700
701
#endif
} else if (renderdata->GL_MESA_ycbcr_texture_supported) {
702
*internalFormat = GL_YCBCR_MESA;
703
*format = GL_YCBCR_MESA;
704
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
705
*type = GL_UNSIGNED_SHORT_8_8_MESA;
706
#else
707
*type = GL_UNSIGNED_SHORT_8_8_REV_MESA;
708
709
#endif
} else if (renderdata->GL_ARB_fragment_program_supported) {
710
711
712
*internalFormat = GL_RGBA;
*format = GL_RGBA;
*type = GL_UNSIGNED_BYTE;
713
} else {
714
return SDL_FALSE;
715
716
}
break;
717
718
case SDL_PIXELFORMAT_YUY2:
if (renderdata->GL_APPLE_ycbcr_422_supported) {
719
720
*internalFormat = GL_RGB;
*format = GL_YCBCR_422_APPLE;
721
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
722
*type = GL_UNSIGNED_SHORT_8_8_REV_APPLE;
723
#else
724
*type = GL_UNSIGNED_SHORT_8_8_APPLE;
725
726
#endif
} else if (renderdata->GL_MESA_ycbcr_texture_supported) {
727
*internalFormat = GL_YCBCR_MESA;
728
*format = GL_YCBCR_MESA;
729
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
730
*type = GL_UNSIGNED_SHORT_8_8_REV_MESA;
731
#else
732
*type = GL_UNSIGNED_SHORT_8_8_MESA;
733
#endif
734
} else {
735
return SDL_FALSE;
736
737
}
break;
738
default:
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
return SDL_FALSE;
}
return SDL_TRUE;
}
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;
GLint internalFormat;
GLenum format, type;
int texture_w, texture_h;
GLuint shader = 0;
GLenum result;
if (!convert_format(renderdata, texture->format, &internalFormat,
&format, &type)) {
758
759
760
SDL_SetError("Unsupported texture format");
return -1;
}
761
762
763
764
765
766
767
768
769
if (texture->format == SDL_PIXELFORMAT_UYVY &&
!renderdata->GL_APPLE_ycbcr_422_supported &&
!renderdata->GL_MESA_ycbcr_texture_supported &&
renderdata->GL_ARB_fragment_program_supported) {
if (renderdata->fragment_program_UYVY == 0) {
renderdata->fragment_program_UYVY =
compile_shader(renderdata, GL_FRAGMENT_PROGRAM_ARB,
fragment_program_UYVY_source_code);
if (renderdata->fragment_program_UYVY == 0) {
770
set_shader_error(renderdata, "UYVY");
771
772
773
774
775
return -1;
}
}
shader = renderdata->fragment_program_UYVY;
}
776
777
data = (GL_TextureData *) SDL_calloc(1, sizeof(*data));
778
779
780
781
782
if (!data) {
SDL_OutOfMemory();
return -1;
}
783
784
data->shader = shader;
785
786
787
788
789
790
791
792
793
794
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));
}
795
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
796
data->pitch = texture->w * bytes_per_pixel(texture->format);
797
798
799
800
801
802
803
804
data->pixels = SDL_malloc(texture->h * data->pitch);
if (!data->pixels) {
SDL_OutOfMemory();
SDL_free(data);
return -1;
}
}
805
806
texture->driverdata = data;
807
808
renderdata->glGetError();
renderdata->glGenTextures(1, &data->texture);
809
810
811
812
if (renderdata->GL_ARB_texture_rectangle_supported) {
data->type = GL_TEXTURE_RECTANGLE_ARB;
texture_w = texture->w;
texture_h = texture->h;
813
814
data->texw = (GLfloat) texture_w;
data->texh = (GLfloat) texture_h;
815
816
817
818
} else {
data->type = GL_TEXTURE_2D;
texture_w = power_of_2(texture->w);
texture_h = power_of_2(texture->h);
819
data->texw = (GLfloat) (texture->w) / texture_w;
820
821
data->texh = (GLfloat) texture->h / texture_h;
}
822
823
824
/* YUV formats use RGBA but are really two bytes per pixel */
if (internalFormat == GL_RGBA && bytes_per_pixel(texture->format) < 4) {
825
data->HACK_RYAN_FIXME = 2;
826
} else {
827
data->HACK_RYAN_FIXME = 1;
828
}
829
texture_w /= data->HACK_RYAN_FIXME;
830
831
832
data->format = format;
data->formattype = type;
833
renderdata->glEnable(data->type);
834
renderdata->glBindTexture(data->type, data->texture);
835
836
837
838
839
840
841
842
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);
843
#ifdef __MACOSX__
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
#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);
}
860
861
/* This causes a crash in testoverlay for some reason. Apple bug? */
#if 0
862
863
if (texture->access == SDL_TEXTUREACCESS_STREAMING
&& texture->format == SDL_PIXELFORMAT_ARGB8888) {
864
/*
865
866
867
868
869
870
if (renderdata->glTextureRangeAPPLE) {
renderdata->glTextureRangeAPPLE(data->type,
texture->h * data->pitch,
data->pixels);
}
*/
871
872
873
874
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
875
#endif
876
877
878
879
880
#endif
{
renderdata->glTexImage2D(data->type, 0, internalFormat, texture_w,
texture_h, 0, format, type, NULL);
}
881
renderdata->glDisable(data->type);
882
result = renderdata->glGetError();
883
884
885
886
if (result != GL_NO_ERROR) {
GL_SetError("glTexImage2D()", result);
return -1;
}
887
888
889
return 0;
}
890
891
892
893
894
895
896
897
898
899
900
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;
}
901
902
903
904
905
906
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;
907
Uint8 *palette;
908
909
910
911
912
913
914
915
916
917
918
919
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;
}
920
renderdata->glEnable(data->type);
921
922
923
renderdata->glBindTexture(data->type, data->texture);
renderdata->glColorTableEXT(data->type, GL_RGB8, 256, GL_RGB,
GL_UNSIGNED_BYTE, data->palette);
924
925
926
927
928
929
930
return 0;
}
static int
GL_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Color * colors, int firstcolor, int ncolors)
{
931
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
932
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
933
Uint8 *palette;
934
935
936
937
938
939
940
941
942
943
944
945
946
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;
}
947
948
949
return 0;
}
950
static void
951
952
SetupTextureUpdate(GL_RenderData * renderdata, SDL_Texture * texture,
int pitch)
953
{
954
if (texture->format == SDL_PIXELFORMAT_INDEX1LSB) {
955
renderdata->glPixelStorei(GL_UNPACK_LSB_FIRST, 1);
956
} else if (texture->format == SDL_PIXELFORMAT_INDEX1MSB) {
957
renderdata->glPixelStorei(GL_UNPACK_LSB_FIRST, 0);
958
}
959
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
960
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH,
961
(pitch / bytes_per_pixel(texture->format)) /
962
963
((GL_TextureData *) texture->driverdata)->
HACK_RYAN_FIXME);
964
965
}
966
967
968
static int
GL_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
969
return 0;
970
971
972
973
974
}
static int
GL_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
975
return 0;
976
977
978
979
980
981
}
static int
GL_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->blendMode) {
982
983
984
985
986
case SDL_BLENDMODE_NONE:
case SDL_BLENDMODE_MASK:
case SDL_BLENDMODE_BLEND:
case SDL_BLENDMODE_ADD:
case SDL_BLENDMODE_MOD:
987
988
989
return 0;
default:
SDL_Unsupported();
990
texture->blendMode = SDL_BLENDMODE_NONE;
991
992
993
994
995
996
997
998
999
1000
return -1;
}
}
static int
GL_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->scaleMode) {
case SDL_TEXTURESCALEMODE_NONE:
case SDL_TEXTURESCALEMODE_FAST: