This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_x11gl.c
532 lines (460 loc) · 14.3 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
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
13
Lesser General Public License for more details.
14
15
16
17
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
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
#include "SDL_x11video.h"
25
#include "../../events/SDL_events_c.h"
26
27
28
#include "SDL_x11dga_c.h"
#include "SDL_x11gl_c.h"
29
#if defined(__IRIX__)
30
31
/* IRIX doesn't have a GL library versioning system */
#define DEFAULT_OPENGL "libGL.so"
32
#elif defined(__MACOSX__)
33
#define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib"
34
35
#elif defined(__QNXNTO__)
#define DEFAULT_OPENGL "libGL.so.3"
36
#else
37
#define DEFAULT_OPENGL "libGL.so.1"
38
#endif
39
40
41
42
43
44
45
#ifndef GLX_ARB_multisample
#define GLX_ARB_multisample
#define GLX_SAMPLE_BUFFERS_ARB 100000
#define GLX_SAMPLES_ARB 100001
#endif
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
#ifndef GLX_EXT_visual_rating
#define GLX_EXT_visual_rating
#define GLX_VISUAL_CAVEAT_EXT 0x20
#define GLX_SLOW_VISUAL_EXT 0x8001
#define GLX_NON_CONFORMANT_VISUAL_EXT 0x800D
#endif
#if SDL_VIDEO_OPENGL_GLX
static int glXExtensionSupported(_THIS, const char *extension)
{
const char *extensions;
const char *start;
const char *where, *terminator;
/* Extension names should not have spaces. */
where = SDL_strchr(extension, ' ');
if ( where || *extension == '\0' ) {
return 0;
}
extensions = this->gl_data->glXQueryExtensionsString(GFX_Display,SDL_Screen);
/* It takes a bit of care to be fool-proof about parsing the
* OpenGL extensions string. Don't be fooled by sub-strings, etc.
*/
start = extensions;
for (;;) {
where = SDL_strstr(start, extension);
if (!where) break;
terminator = where + strlen(extension);
if (where == start || *(where - 1) == ' ')
if (*terminator == ' ' || *terminator == '\0') return 1;
start = terminator;
}
return 0;
}
#endif /* SDL_VIDEO_OPENGL_GLX */
87
88
XVisualInfo *X11_GL_GetVisual(_THIS)
{
89
#if SDL_VIDEO_OPENGL_GLX
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
/* 64 seems nice. */
int attribs[64];
int i;
/* load the gl driver from a default path */
if ( ! this->gl_config.driver_loaded ) {
/* no driver has been loaded, use default (ourselves) */
if ( X11_GL_LoadLibrary(this, NULL) < 0 ) {
return NULL;
}
}
/* See if we already have a window which we must use */
if ( SDL_windowid ) {
XWindowAttributes a;
XVisualInfo vi_in;
int out_count;
108
XGetWindowAttributes(SDL_Display, SDL_Window, &a);
109
vi_in.screen = SDL_Screen;
110
111
vi_in.visualid = XVisualIDFromVisual(a.visual);
glx_visualinfo = XGetVisualInfo(SDL_Display,
112
113
114
115
116
VisualScreenMask|VisualIDMask, &vi_in, &out_count);
return glx_visualinfo;
}
/* Setup our GLX attributes according to the gl_config. */
117
118
i = 0;
attribs[i++] = GLX_RGBA;
119
120
121
122
123
124
125
126
127
128
129
130
131
attribs[i++] = GLX_RED_SIZE;
attribs[i++] = this->gl_config.red_size;
attribs[i++] = GLX_GREEN_SIZE;
attribs[i++] = this->gl_config.green_size;
attribs[i++] = GLX_BLUE_SIZE;
attribs[i++] = this->gl_config.blue_size;
if( this->gl_config.alpha_size ) {
attribs[i++] = GLX_ALPHA_SIZE;
attribs[i++] = this->gl_config.alpha_size;
}
if( this->gl_config.buffer_size ) {
132
133
attribs[i++] = GLX_BUFFER_SIZE;
attribs[i++] = this->gl_config.buffer_size;
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
}
if( this->gl_config.double_buffer ) {
attribs[i++] = GLX_DOUBLEBUFFER;
}
attribs[i++] = GLX_DEPTH_SIZE;
attribs[i++] = this->gl_config.depth_size;
if( this->gl_config.stencil_size ) {
attribs[i++] = GLX_STENCIL_SIZE;
attribs[i++] = this->gl_config.stencil_size;
}
if( this->gl_config.accum_red_size ) {
149
attribs[i++] = GLX_ACCUM_RED_SIZE;
150
151
152
153
attribs[i++] = this->gl_config.accum_red_size;
}
if( this->gl_config.accum_green_size ) {
154
attribs[i++] = GLX_ACCUM_GREEN_SIZE;
155
156
157
158
attribs[i++] = this->gl_config.accum_green_size;
}
if( this->gl_config.accum_blue_size ) {
159
attribs[i++] = GLX_ACCUM_BLUE_SIZE;
160
161
162
163
attribs[i++] = this->gl_config.accum_blue_size;
}
if( this->gl_config.accum_alpha_size ) {
164
attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
165
166
167
attribs[i++] = this->gl_config.accum_alpha_size;
}
168
169
170
if( this->gl_config.stereo ) {
attribs[i++] = GLX_STEREO;
}
171
172
if( this->gl_config.multisamplebuffers ) {
173
attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
174
attribs[i++] = this->gl_config.multisamplebuffers;
175
176
}
177
if( this->gl_config.multisamplesamples ) {
178
attribs[i++] = GLX_SAMPLES_ARB;
179
attribs[i++] = this->gl_config.multisamplesamples;
180
}
181
182
183
184
185
186
187
if( this->gl_config.accelerated >= 0 &&
glXExtensionSupported(this, "GLX_EXT_visual_rating") ) {
attribs[i++] = GLX_VISUAL_CAVEAT_EXT;
attribs[i++] = this->gl_config.accelerated ? GLX_NONE : GLX_DONT_CARE;
}
188
#ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */
189
if ( !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) {
190
191
192
attribs[i++] = GLX_X_VISUAL_TYPE;
attribs[i++] = GLX_DIRECT_COLOR;
}
193
194
195
196
197
198
#endif
attribs[i++] = None;
glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
SDL_Screen, attribs);
#ifdef GLX_DIRECT_COLOR
199
if( !glx_visualinfo && !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */
200
201
202
203
204
205
206
207
208
attribs[i-3] = None;
glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display,
SDL_Screen, attribs);
}
#endif
if( !glx_visualinfo ) {
SDL_SetError( "Couldn't find matching GLX visual");
return NULL;
}
209
210
211
/*
printf("Found GLX visual 0x%x\n", glx_visualinfo->visualid);
*/
212
213
214
215
216
217
218
219
220
221
return glx_visualinfo;
#else
SDL_SetError("X11 driver not configured with OpenGL");
return NULL;
#endif
}
int X11_GL_CreateWindow(_THIS, int w, int h)
{
int retval;
222
#if SDL_VIDEO_OPENGL_GLX
223
224
225
226
227
228
229
230
231
232
233
234
XSetWindowAttributes attributes;
unsigned long mask;
unsigned long black;
black = (glx_visualinfo->visual == DefaultVisual(SDL_Display,
SDL_Screen))
? BlackPixel(SDL_Display, SDL_Screen) : 0;
attributes.background_pixel = black;
attributes.border_pixel = black;
attributes.colormap = SDL_XColorMap;
mask = CWBackPixel | CWBorderPixel | CWColormap;
235
SDL_Window = XCreateWindow(SDL_Display, WMwindow,
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
0, 0, w, h, 0, glx_visualinfo->depth,
InputOutput, glx_visualinfo->visual,
mask, &attributes);
if ( !SDL_Window ) {
SDL_SetError("Could not create window");
return -1;
}
retval = 0;
#else
SDL_SetError("X11 driver not configured with OpenGL");
retval = -1;
#endif
return(retval);
}
int X11_GL_CreateContext(_THIS)
{
int retval;
254
#if SDL_VIDEO_OPENGL_GLX
255
256
/* We do this to create a clean separation between X and GLX errors. */
257
XSync( SDL_Display, False );
258
259
glx_context = this->gl_data->glXCreateContext(GFX_Display,
glx_visualinfo, NULL, True);
260
XSync( GFX_Display, False );
261
262
if ( glx_context == NULL ) {
263
SDL_SetError("Could not create GL context");
264
265
266
267
return(-1);
}
if ( X11_GL_MakeCurrent(this) < 0 ) {
return(-1);
268
269
}
gl_active = 1;
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
if ( !glXExtensionSupported(this, "SGI_swap_control") ) {
this->gl_data->glXSwapIntervalSGI = NULL;
}
if ( !glXExtensionSupported(this, "GLX_MESA_swap_control") ) {
this->gl_data->glXSwapIntervalMESA = NULL;
this->gl_data->glXGetSwapIntervalMESA = NULL;
}
if ( this->gl_config.swap_control >= 0 ) {
if ( this->gl_data->glXSwapIntervalMESA ) {
this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control);
} else if ( this->gl_data->glXSwapIntervalSGI ) {
this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control);
}
}
285
286
287
288
289
290
291
292
293
294
295
296
297
#else
SDL_SetError("X11 driver not configured with OpenGL");
#endif
if ( gl_active ) {
retval = 0;
} else {
retval = -1;
}
return(retval);
}
void X11_GL_Shutdown(_THIS)
{
298
#if SDL_VIDEO_OPENGL_GLX
299
300
301
302
303
304
305
306
307
308
/* Clean up OpenGL */
if( glx_context ) {
this->gl_data->glXMakeCurrent(GFX_Display, None, NULL);
if (glx_context != NULL)
this->gl_data->glXDestroyContext(GFX_Display, glx_context);
glx_context = NULL;
}
gl_active = 0;
309
#endif /* SDL_VIDEO_OPENGL_GLX */
310
311
}
312
#if SDL_VIDEO_OPENGL_GLX
313
314
315
316
317
/* Make the current context active */
int X11_GL_MakeCurrent(_THIS)
{
int retval;
318
319
320
321
322
323
324
retval = 0;
if ( ! this->gl_data->glXMakeCurrent(GFX_Display,
SDL_Window, glx_context) ) {
SDL_SetError("Unable to make GL context current");
retval = -1;
}
325
XSync( GFX_Display, False );
326
327
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
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
/* More Voodoo X server workarounds... Grr... */
SDL_Lock_EventThread();
X11_CheckDGAMouse(this);
SDL_Unlock_EventThread();
return(retval);
}
/* Get attribute data from glX. */
int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
{
int retval;
int glx_attrib = None;
switch( attrib ) {
case SDL_GL_RED_SIZE:
glx_attrib = GLX_RED_SIZE;
break;
case SDL_GL_GREEN_SIZE:
glx_attrib = GLX_GREEN_SIZE;
break;
case SDL_GL_BLUE_SIZE:
glx_attrib = GLX_BLUE_SIZE;
break;
case SDL_GL_ALPHA_SIZE:
glx_attrib = GLX_ALPHA_SIZE;
break;
case SDL_GL_DOUBLEBUFFER:
glx_attrib = GLX_DOUBLEBUFFER;
break;
case SDL_GL_BUFFER_SIZE:
glx_attrib = GLX_BUFFER_SIZE;
break;
case SDL_GL_DEPTH_SIZE:
glx_attrib = GLX_DEPTH_SIZE;
break;
case SDL_GL_STENCIL_SIZE:
glx_attrib = GLX_STENCIL_SIZE;
break;
case SDL_GL_ACCUM_RED_SIZE:
glx_attrib = GLX_ACCUM_RED_SIZE;
break;
case SDL_GL_ACCUM_GREEN_SIZE:
glx_attrib = GLX_ACCUM_GREEN_SIZE;
break;
case SDL_GL_ACCUM_BLUE_SIZE:
glx_attrib = GLX_ACCUM_BLUE_SIZE;
break;
case SDL_GL_ACCUM_ALPHA_SIZE:
glx_attrib = GLX_ACCUM_ALPHA_SIZE;
break;
378
379
380
case SDL_GL_STEREO:
glx_attrib = GLX_STEREO;
break;
381
case SDL_GL_MULTISAMPLEBUFFERS:
382
383
glx_attrib = GLX_SAMPLE_BUFFERS_ARB;
break;
384
case SDL_GL_MULTISAMPLESAMPLES:
385
386
glx_attrib = GLX_SAMPLES_ARB;
break;
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
case SDL_GL_ACCELERATED_VISUAL:
if ( glXExtensionSupported(this, "GLX_EXT_visual_rating") ) {
glx_attrib = GLX_VISUAL_CAVEAT_EXT;
retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
if ( *value == GLX_SLOW_VISUAL_EXT ) {
*value = SDL_FALSE;
} else {
*value = SDL_TRUE;
}
return retval;
} else {
return(-1);
}
break;
case SDL_GL_SWAP_CONTROL:
if ( this->gl_data->glXGetSwapIntervalMESA ) {
return this->gl_data->glXGetSwapIntervalMESA();
} else {
return(-1)/*(this->gl_config.swap_control > 0)*/;
}
break;
408
409
410
411
412
413
414
415
416
417
418
419
420
421
default:
return(-1);
}
retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value);
return retval;
}
void X11_GL_SwapBuffers(_THIS)
{
this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window);
}
422
#endif /* SDL_VIDEO_OPENGL_GLX */
423
424
425
void X11_GL_UnloadLibrary(_THIS)
{
426
#if SDL_VIDEO_OPENGL_GLX
427
if ( this->gl_config.driver_loaded ) {
428
429
SDL_UnloadObject(this->gl_config.dll_handle);
430
431
432
433
434
435
436
this->gl_data->glXGetProcAddress = NULL;
this->gl_data->glXChooseVisual = NULL;
this->gl_data->glXCreateContext = NULL;
this->gl_data->glXDestroyContext = NULL;
this->gl_data->glXMakeCurrent = NULL;
this->gl_data->glXSwapBuffers = NULL;
437
438
439
this->gl_data->glXSwapIntervalSGI = NULL;
this->gl_data->glXSwapIntervalMESA = NULL;
this->gl_data->glXGetSwapIntervalMESA = NULL;
440
441
442
443
444
445
446
this->gl_config.dll_handle = NULL;
this->gl_config.driver_loaded = 0;
}
#endif
}
447
#if SDL_VIDEO_OPENGL_GLX
448
449
450
451
/* Passing a NULL path means load pointers from the application */
int X11_GL_LoadLibrary(_THIS, const char* path)
{
452
void* handle = NULL;
453
454
455
456
457
458
459
if ( gl_active ) {
SDL_SetError("OpenGL context already created");
return -1;
}
if ( path == NULL ) {
460
path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
461
462
463
if ( path == NULL ) {
path = DEFAULT_OPENGL;
}
464
465
}
466
467
468
469
handle = SDL_LoadObject(path);
if ( handle == NULL ) {
/* SDL_LoadObject() will call SDL_SetError() for us. */
return -1;
470
471
472
473
474
475
}
/* Unload the old driver and reset the pointers */
X11_GL_UnloadLibrary(this);
/* Load new function pointers */
476
this->gl_data->glXGetProcAddress =
477
(void *(*)(const GLubyte *)) SDL_LoadFunction(handle, "glXGetProcAddressARB");
478
this->gl_data->glXChooseVisual =
479
(XVisualInfo *(*)(Display *, int, int *)) SDL_LoadFunction(handle, "glXChooseVisual");
480
this->gl_data->glXCreateContext =
481
(GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) SDL_LoadFunction(handle, "glXCreateContext");
482
this->gl_data->glXDestroyContext =
483
(void (*)(Display *, GLXContext)) SDL_LoadFunction(handle, "glXDestroyContext");
484
this->gl_data->glXMakeCurrent =
485
(int (*)(Display *, GLXDrawable, GLXContext)) SDL_LoadFunction(handle, "glXMakeCurrent");
486
this->gl_data->glXSwapBuffers =
487
(void (*)(Display *, GLXDrawable)) SDL_LoadFunction(handle, "glXSwapBuffers");
488
this->gl_data->glXGetConfig =
489
(int (*)(Display *, XVisualInfo *, int, int *)) SDL_LoadFunction(handle, "glXGetConfig");
490
this->gl_data->glXQueryExtensionsString =
491
(const char *(*)(Display *, int)) SDL_LoadFunction(handle, "glXQueryExtensionsString");
492
493
494
495
496
497
this->gl_data->glXSwapIntervalSGI =
(int (*)(int)) SDL_LoadFunction(handle, "glXSwapIntervalSGI");
this->gl_data->glXSwapIntervalMESA =
(GLint (*)(unsigned)) SDL_LoadFunction(handle, "glXSwapIntervalMESA");
this->gl_data->glXGetSwapIntervalMESA =
(GLint (*)(void)) SDL_LoadFunction(handle, "glXGetSwapIntervalMESA");
498
499
500
501
502
503
if ( (this->gl_data->glXChooseVisual == NULL) ||
(this->gl_data->glXCreateContext == NULL) ||
(this->gl_data->glXDestroyContext == NULL) ||
(this->gl_data->glXMakeCurrent == NULL) ||
(this->gl_data->glXSwapBuffers == NULL) ||
504
505
(this->gl_data->glXGetConfig == NULL) ||
(this->gl_data->glXQueryExtensionsString == NULL)) {
506
507
508
509
510
511
512
SDL_SetError("Could not retrieve OpenGL functions");
return -1;
}
this->gl_config.dll_handle = handle;
this->gl_config.driver_loaded = 1;
if ( path ) {
513
514
SDL_strlcpy(this->gl_config.driver_path, path,
SDL_arraysize(this->gl_config.driver_path));
515
} else {
516
*this->gl_config.driver_path = '\0';
517
518
519
520
521
522
523
524
525
526
}
return 0;
}
void *X11_GL_GetProcAddress(_THIS, const char* proc)
{
void* handle;
handle = this->gl_config.dll_handle;
if ( this->gl_data->glXGetProcAddress ) {
527
return this->gl_data->glXGetProcAddress((const GLubyte *)proc);
528
}
529
return SDL_LoadFunction(handle, proc);
530
531
}
532
#endif /* SDL_VIDEO_OPENGL_GLX */