This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_x11opengles.c
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_config.h"
23
#if SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_ES
24
25
26
27
#include "SDL_x11video.h"
#include "SDL_x11opengles.h"
28
29
30
31
#define DEFAULT_EGL "libEGL.so"
#define DEFAULT_OGL_ES2 "libGLESv2.so"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.so"
#define DEFAULT_OGL_ES "libGLESv1_CM.so"
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
#define LOAD_FUNC(NAME) \
*((void**)&_this->gles_data->NAME) = dlsym(handle, #NAME); \
if (!_this->gles_data->NAME) \
{ \
SDL_SetError("Could not retrieve EGL function " #NAME); \
return -1; \
}
/* GLES implementation of SDL OpenGL support */
void *
X11_GLES_GetProcAddress(_THIS, const char *proc)
{
static char procname[1024];
void *handle;
void *retval;
50
handle = _this->gles_data->egl_dll_handle;
51
52
53
54
55
56
if (_this->gles_data->eglGetProcAddress) {
retval = _this->gles_data->eglGetProcAddress(proc);
if (retval) {
return retval;
}
}
57
58
handle = _this->gl_config.dll_handle;
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
#if defined(__OpenBSD__) && !defined(__ELF__)
#undef dlsym(x,y);
#endif
retval = dlsym(handle, proc);
if (!retval && strlen(proc) <= 1022) {
procname[0] = '_';
strcpy(procname + 1, proc);
retval = dlsym(handle, procname);
}
return retval;
}
void
X11_GLES_UnloadLibrary(_THIS)
{
if (_this->gl_config.driver_loaded) {
_this->gles_data->eglTerminate(_this->gles_data->egl_display);
dlclose(_this->gl_config.dll_handle);
78
dlclose(_this->gles_data->egl_dll_handle);
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
_this->gles_data->eglGetProcAddress = NULL;
_this->gles_data->eglChooseConfig = NULL;
_this->gles_data->eglCreateContext = NULL;
_this->gles_data->eglCreateWindowSurface = NULL;
_this->gles_data->eglDestroyContext = NULL;
_this->gles_data->eglDestroySurface = NULL;
_this->gles_data->eglMakeCurrent = NULL;
_this->gles_data->eglSwapBuffers = NULL;
_this->gles_data->eglGetDisplay = NULL;
_this->gles_data->eglTerminate = NULL;
_this->gl_config.dll_handle = NULL;
_this->gl_config.driver_loaded = 0;
}
}
int
X11_GLES_LoadLibrary(_THIS, const char *path)
{
void *handle;
int dlopen_flags;
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
if (_this->gles_data->egl_active) {
SDL_SetError("OpenGL ES context already created");
return -1;
}
#ifdef RTLD_GLOBAL
dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
#else
dlopen_flags = RTLD_LAZY;
#endif
handle = dlopen(path, dlopen_flags);
/* Catch the case where the application isn't linked with EGL */
if ((dlsym(handle, "eglChooseConfig") == NULL) && (path == NULL)) {
dlclose(handle);
118
path = getenv("SDL_VIDEO_EGL_DRIVER");
119
if (path == NULL) {
120
path = DEFAULT_EGL;
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
}
handle = dlopen(path, dlopen_flags);
}
if (handle == NULL) {
SDL_SetError("Could not load OpenGL ES/EGL library");
return -1;
}
/* Unload the old driver and reset the pointers */
X11_GLES_UnloadLibrary(_this);
/* Load new function pointers */
LOAD_FUNC(eglGetDisplay);
LOAD_FUNC(eglInitialize);
LOAD_FUNC(eglTerminate);
LOAD_FUNC(eglGetProcAddress);
LOAD_FUNC(eglChooseConfig);
LOAD_FUNC(eglGetConfigAttrib);
LOAD_FUNC(eglCreateContext);
LOAD_FUNC(eglDestroyContext);
LOAD_FUNC(eglCreateWindowSurface);
LOAD_FUNC(eglDestroySurface);
LOAD_FUNC(eglMakeCurrent);
LOAD_FUNC(eglSwapBuffers);
146
LOAD_FUNC(eglSwapInterval);
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
_this->gles_data->egl_display =
_this->gles_data->eglGetDisplay((NativeDisplayType) data->display);
if (!_this->gles_data->egl_display) {
SDL_SetError("Could not get EGL display");
return -1;
}
if (_this->gles_data->
eglInitialize(_this->gles_data->egl_display, NULL,
NULL) != EGL_TRUE) {
SDL_SetError("Could not initialize EGL");
return -1;
}
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
_this->gles_data->egl_dll_handle = handle;
path = getenv("SDL_VIDEO_GL_DRIVER");
handle = dlopen(path, dlopen_flags);
if ((path == NULL) | (handle == NULL)) {
if (_this->gl_config.major_version > 1) {
path = DEFAULT_OGL_ES2;
handle = dlopen(path, dlopen_flags);
} else {
path = DEFAULT_OGL_ES;
handle = dlopen(path, dlopen_flags);
if (handle == NULL) {
path = DEFAULT_OGL_ES_PVR;
handle = dlopen(path, dlopen_flags);
}
}
}
if (handle == NULL) {
SDL_SetError("Could not initialize OpenGL ES library");
return -1;
}
186
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
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
243
244
245
246
247
248
249
250
_this->gl_config.dll_handle = handle;
_this->gl_config.driver_loaded = 1;
if (path) {
strncpy(_this->gl_config.driver_path, path,
sizeof(_this->gl_config.driver_path) - 1);
} else {
strcpy(_this->gl_config.driver_path, "");
}
return 0;
}
XVisualInfo *
X11_GLES_GetVisual(_THIS, Display * display, int screen)
{
/* 64 seems nice. */
EGLint attribs[64];
EGLint found_configs = 0;
VisualID visual_id;
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_GLES_LoadLibrary(_this, NULL) < 0) {
return NULL;
}
}
i = 0;
attribs[i++] = EGL_RED_SIZE;
attribs[i++] = _this->gl_config.red_size;
attribs[i++] = EGL_GREEN_SIZE;
attribs[i++] = _this->gl_config.green_size;
attribs[i++] = EGL_BLUE_SIZE;
attribs[i++] = _this->gl_config.blue_size;
if (_this->gl_config.alpha_size) {
attribs[i++] = EGL_ALPHA_SIZE;
attribs[i++] = _this->gl_config.alpha_size;
}
if (_this->gl_config.buffer_size) {
attribs[i++] = EGL_BUFFER_SIZE;
attribs[i++] = _this->gl_config.buffer_size;
}
attribs[i++] = EGL_DEPTH_SIZE;
attribs[i++] = _this->gl_config.depth_size;
if (_this->gl_config.stencil_size) {
attribs[i++] = EGL_STENCIL_SIZE;
attribs[i++] = _this->gl_config.stencil_size;
}
if (_this->gl_config.multisamplebuffers) {
attribs[i++] = EGL_SAMPLE_BUFFERS;
attribs[i++] = _this->gl_config.multisamplebuffers;
}
if (_this->gl_config.multisamplesamples) {
attribs[i++] = EGL_SAMPLES;
attribs[i++] = _this->gl_config.multisamplesamples;
}
251
252
253
254
255
256
257
attribs[i++] = EGL_RENDERABLE_TYPE;
if (_this->gl_config.major_version == 2) {
attribs[i++] = EGL_OPENGL_ES2_BIT;
} else {
attribs[i++] = EGL_OPENGL_ES_BIT;
}
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
287
288
289
290
291
292
293
294
295
296
297
298
299
attribs[i++] = EGL_NONE;
if (_this->gles_data->eglChooseConfig(_this->gles_data->egl_display,
attribs,
&_this->gles_data->egl_config, 1,
&found_configs) == EGL_FALSE ||
found_configs == 0) {
SDL_SetError("Couldn't find matching EGL config");
return NULL;
}
if (_this->gles_data->eglGetConfigAttrib(_this->gles_data->egl_display,
_this->gles_data->egl_config,
EGL_NATIVE_VISUAL_ID,
(EGLint *) & visual_id) ==
EGL_FALSE || !visual_id) {
/* Use the default visual when all else fails */
XVisualInfo vi_in;
int out_count;
vi_in.screen = screen;
_this->gles_data->egl_visualinfo = XGetVisualInfo(display,
VisualScreenMask,
&vi_in, &out_count);
} else {
XVisualInfo vi_in;
int out_count;
vi_in.screen = screen;
vi_in.visualid = visual_id;
_this->gles_data->egl_visualinfo = XGetVisualInfo(display,
VisualScreenMask |
VisualIDMask,
&vi_in, &out_count);
}
return _this->gles_data->egl_visualinfo;
}
SDL_GLContext
X11_GLES_CreateContext(_THIS, SDL_Window * window)
{
300
301
302
303
304
305
EGLint context_attrib_list[] = {
EGL_CONTEXT_CLIENT_VERSION,
1,
EGL_NONE
};
306
307
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
Display *display = data->videodata->display;
308
SDL_GLContext context = 1;
309
310
311
XSync(display, False);
312
313
314
if (_this->gl_config.major_version) {
context_attrib_list[1] = _this->gl_config.major_version;
}
315
316
317
318
_this->gles_data->egl_context =
_this->gles_data->eglCreateContext(_this->gles_data->egl_display,
_this->gles_data->egl_config,
319
EGL_NO_CONTEXT, context_attrib_list);
320
321
322
323
324
325
326
327
XSync(display, False);
if (_this->gles_data->egl_context == EGL_NO_CONTEXT) {
SDL_SetError("Could not create EGL context");
return NULL;
}
_this->gles_data->egl_active = 1;
328
_this->gles_data->egl_swapinterval = 0;
330
331
332
333
if (X11_GLES_MakeCurrent(_this, window, context) < 0) {
X11_GLES_DeleteContext(_this, context);
return NULL;
}
335
return context;
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
}
int
X11_GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
{
int retval;
// SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
// Display *display = data->videodata->display;
retval = 1;
if (!_this->gles_data->eglMakeCurrent(_this->gles_data->egl_display,
_this->gles_data->egl_surface,
_this->gles_data->egl_surface,
_this->gles_data->egl_context)) {
SDL_SetError("Unable to make EGL context current");
retval = -1;
}
// XSync(display, False);
return (retval);
}
int
X11_GLES_SetSwapInterval(_THIS, int interval)
{
362
363
364
365
366
367
368
369
370
371
372
373
374
375
if (_this->gles_data->egl_active != 1) {
SDL_SetError("OpenGL ES context not active");
return -1;
}
EGLBoolean status;
status = _this->gles_data->eglSwapInterval(_this->gles_data->egl_display, interval);
if (status == EGL_TRUE) {
_this->gles_data->egl_swapinterval = interval;
return 0;
}
SDL_SetError("Unable to set the EGL swap interval");
return -1;
376
377
378
379
380
}
int
X11_GLES_GetSwapInterval(_THIS)
{
381
382
383
384
385
386
if (_this->gles_data->egl_active != 1) {
SDL_SetError("OpenGL ES context not active");
return -1;
}
return _this->gles_data->egl_swapinterval;
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
}
void
X11_GLES_SwapWindow(_THIS, SDL_Window * window)
{
_this->gles_data->eglSwapBuffers(_this->gles_data->egl_display,
_this->gles_data->egl_surface);
}
void
X11_GLES_DeleteContext(_THIS, SDL_GLContext context)
{
/* Clean up GLES and EGL */
if (_this->gles_data->egl_context != EGL_NO_CONTEXT ||
_this->gles_data->egl_surface != EGL_NO_SURFACE) {
_this->gles_data->eglMakeCurrent(_this->gles_data->egl_display,
EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
if (_this->gles_data->egl_context != EGL_NO_CONTEXT) {
_this->gles_data->eglDestroyContext(_this->gles_data->egl_display,
_this->gles_data->
egl_context);
_this->gles_data->egl_context = EGL_NO_CONTEXT;
}
if (_this->gles_data->egl_surface != EGL_NO_SURFACE) {
_this->gles_data->eglDestroySurface(_this->gles_data->egl_display,
_this->gles_data->
egl_surface);
_this->gles_data->egl_surface = EGL_NO_SURFACE;
}
}
_this->gles_data->egl_active = 0;
/* crappy fix */
X11_GLES_UnloadLibrary(_this);
}
427
#endif /* SDL_VIDEO_DRIVER_X11 && SDL_VIDEO_OPENGL_ES */
428
429
/* vi: set ts=4 sw=4 expandtab: */