SDL_egl.c
1
2
/*
* Simple DirectMedia Layer
3
* Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
*
* 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_internal.h"
#if SDL_VIDEO_OPENGL_EGL
#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
#include "../core/windows/SDL_windows.h"
#endif
28
29
#if SDL_VIDEO_DRIVER_ANDROID
#include <android/native_window.h>
30
#include "../core/android/SDL_android.h"
31
#endif
32
33
#include "SDL_sysvideo.h"
34
#include "SDL_log.h"
35
36
37
38
39
40
41
42
43
44
45
46
47
#include "SDL_egl_c.h"
#include "SDL_loadso.h"
#include "SDL_hints.h"
#ifdef EGL_KHR_create_context
/* EGL_OPENGL_ES3_BIT_KHR was added in version 13 of the extension. */
#ifndef EGL_OPENGL_ES3_BIT_KHR
#define EGL_OPENGL_ES3_BIT_KHR 0x00000040
#endif
#endif /* EGL_KHR_create_context */
#if SDL_VIDEO_DRIVER_RPI
/* Raspbian places the OpenGL ES/EGL binaries in a non standard path */
48
49
50
51
52
53
#define DEFAULT_EGL ( vc4 ? "libEGL.so.1" : "libbrcmEGL.so" )
#define DEFAULT_OGL_ES2 ( vc4 ? "libGLESv2.so.2" : "libbrcmGLESv2.so" )
#define ALT_EGL "libEGL.so"
#define ALT_OGL_ES2 "libGLESv2.so"
#define DEFAULT_OGL_ES_PVR ( vc4 ? "libGLES_CM.so.1" : "libbrcmGLESv2.so" )
#define DEFAULT_OGL_ES ( vc4 ? "libGLESv1_CM.so.1" : "libbrcmGLESv2.so" )
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
#elif SDL_VIDEO_DRIVER_ANDROID || SDL_VIDEO_DRIVER_VIVANTE
/* Android */
#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"
#elif SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
/* EGL AND OpenGL ES support via ANGLE */
#define DEFAULT_EGL "libEGL.dll"
#define DEFAULT_OGL_ES2 "libGLESv2.dll"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.dll"
#define DEFAULT_OGL_ES "libGLESv1_CM.dll"
69
70
71
72
73
74
75
#elif SDL_VIDEO_DRIVER_COCOA
/* EGL AND OpenGL ES support via ANGLE */
#define DEFAULT_EGL "libEGL.dylib"
#define DEFAULT_OGL_ES2 "libGLESv2.dylib"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.dylib" //???
#define DEFAULT_OGL_ES "libGLESv1_CM.dylib" //???
76
77
78
79
80
81
82
83
84
#else
/* Desktop Linux */
#define DEFAULT_OGL "libGL.so.1"
#define DEFAULT_EGL "libEGL.so.1"
#define DEFAULT_OGL_ES2 "libGLESv2.so.2"
#define DEFAULT_OGL_ES_PVR "libGLES_CM.so.1"
#define DEFAULT_OGL_ES "libGLESv1_CM.so.1"
#endif /* SDL_VIDEO_DRIVER_RPI */
85
86
87
88
89
90
91
/** If we happen to not have this defined because of an older EGL version, just define it 0x0
as eglGetPlatformDisplayEXT will most likely be NULL if this is missing
*/
#ifndef EGL_PLATFORM_DEVICE_EXT
#define EGL_PLATFORM_DEVICE_EXT 0x0
#endif
92
93
94
95
#ifdef SDL_VIDEO_STATIC_ANGLE
#define LOAD_FUNC(NAME) \
_this->egl_data->NAME = (void *)NAME;
#else
96
#define LOAD_FUNC(NAME) \
97
_this->egl_data->NAME = SDL_LoadFunction(_this->egl_data->dll_handle, #NAME); \
98
99
100
101
if (!_this->egl_data->NAME) \
{ \
return SDL_SetError("Could not retrieve EGL function " #NAME); \
}
104
105
106
107
108
/* it is allowed to not have some of the EGL extensions on start - attempts to use them will fail later. */
#define LOAD_FUNC_EGLEXT(NAME) \
_this->egl_data->NAME = _this->egl_data->eglGetProcAddress(#NAME);
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
static const char * SDL_EGL_GetErrorName(EGLint eglErrorCode)
{
#define SDL_EGL_ERROR_TRANSLATE(e) case e: return #e;
switch (eglErrorCode) {
SDL_EGL_ERROR_TRANSLATE(EGL_SUCCESS);
SDL_EGL_ERROR_TRANSLATE(EGL_NOT_INITIALIZED);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ACCESS);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ALLOC);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ATTRIBUTE);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONTEXT);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONFIG);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CURRENT_SURFACE);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_DISPLAY);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_SURFACE);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_MATCH);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_PARAMETER);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_PIXMAP);
SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_WINDOW);
SDL_EGL_ERROR_TRANSLATE(EGL_CONTEXT_LOST);
}
return "";
}
int SDL_EGL_SetErrorEx(const char * message, const char * eglFunctionName, EGLint eglErrorCode)
{
const char * errorText = SDL_EGL_GetErrorName(eglErrorCode);
char altErrorText[32];
if (errorText[0] == '\0') {
/* An unknown-to-SDL error code was reported. Report its hexadecimal value, instead of its name. */
SDL_snprintf(altErrorText, SDL_arraysize(altErrorText), "0x%x", (unsigned int)eglErrorCode);
errorText = altErrorText;
}
return SDL_SetError("%s (call to %s failed, reporting an error of %s)", message, eglFunctionName, errorText);
}
144
/* EGL implementation of SDL OpenGL ES support */
145
146
147
148
149
150
typedef enum {
SDL_EGL_DISPLAY_EXTENSION,
SDL_EGL_CLIENT_EXTENSION
} SDL_EGL_ExtensionType;
static SDL_bool SDL_EGL_HasExtension(_THIS, SDL_EGL_ExtensionType type, const char *ext)
152
size_t ext_len;
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
const char *ext_override;
const char *egl_extstr;
const char *ext_start;
/* Invalid extensions can be rejected early */
if (ext == NULL || *ext == 0 || SDL_strchr(ext, ' ') != NULL) {
/* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid EGL extension"); */
return SDL_FALSE;
}
/* Extensions can be masked with an environment variable.
* Unlike the OpenGL override, this will use the set bits of an integer
* to disable the extension.
* Bit Action
* 0 If set, the display extension is masked and not present to SDL.
* 1 If set, the client extension is masked and not present to SDL.
*/
ext_override = SDL_getenv(ext);
if (ext_override != NULL) {
int disable_ext = SDL_atoi(ext_override);
if (disable_ext & 0x01 && type == SDL_EGL_DISPLAY_EXTENSION) {
return SDL_FALSE;
} else if (disable_ext & 0x02 && type == SDL_EGL_CLIENT_EXTENSION) {
return SDL_FALSE;
}
}
179
180
ext_len = SDL_strlen(ext);
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
switch (type) {
case SDL_EGL_DISPLAY_EXTENSION:
egl_extstr = _this->egl_data->eglQueryString(_this->egl_data->egl_display, EGL_EXTENSIONS);
break;
case SDL_EGL_CLIENT_EXTENSION:
/* EGL_EXT_client_extensions modifies eglQueryString to return client extensions
* if EGL_NO_DISPLAY is passed. Implementations without it are required to return NULL.
* This behavior is included in EGL 1.5.
*/
egl_extstr = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
break;
default:
/* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid extension type"); */
return SDL_FALSE;
}
197
198
if (egl_extstr != NULL) {
ext_start = egl_extstr;
200
201
202
203
204
205
206
207
208
while (*ext_start) {
ext_start = SDL_strstr(ext_start, ext);
if (ext_start == NULL) {
return SDL_FALSE;
}
/* Check if the match is not just a substring of one of the extensions */
if (ext_start == egl_extstr || *(ext_start - 1) == ' ') {
if (ext_start[ext_len] == ' ' || ext_start[ext_len] == 0) {
return SDL_TRUE;
210
211
212
213
214
}
/* If the search stopped in the middle of an extension, skip to the end of it */
ext_start += ext_len;
while (*ext_start != ' ' && *ext_start != 0) {
ext_start++;
215
216
217
218
}
}
}
219
return SDL_FALSE;
220
221
222
223
224
}
void *
SDL_EGL_GetProcAddress(_THIS, const char *proc)
{
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
const Uint32 eglver = (((Uint32) _this->egl_data->egl_version_major) << 16) | ((Uint32) _this->egl_data->egl_version_minor);
const SDL_bool is_egl_15_or_later = eglver >= ((((Uint32) 1) << 16) | 5);
void *retval = NULL;
/* eglGetProcAddress is busted on Android http://code.google.com/p/android/issues/detail?id=7681 */
#if !defined(SDL_VIDEO_DRIVER_ANDROID)
/* EGL 1.5 can use eglGetProcAddress() for any symbol. 1.4 and earlier can't use it for core entry points. */
if (!retval && is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
retval = _this->egl_data->eglGetProcAddress(proc);
}
#endif
/* Try SDL_LoadFunction() first for EGL <= 1.4, or as a fallback for >= 1.5. */
if (!retval) {
static char procname[64];
retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, proc);
/* just in case you need an underscore prepended... */
if (!retval && (SDL_strlen(proc) < (sizeof (procname) - 1))) {
procname[0] = '_';
SDL_strlcpy(procname + 1, proc, sizeof (procname) - 1);
retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, procname);
}
}
249
/* eglGetProcAddress is busted on Android http://code.google.com/p/android/issues/detail?id=7681 */
250
#if !defined(SDL_VIDEO_DRIVER_ANDROID)
251
252
/* Try eglGetProcAddress if we on <= 1.4 and still searching... */
if (!retval && !is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
253
254
255
256
257
258
retval = _this->egl_data->eglGetProcAddress(proc);
if (retval) {
return retval;
}
}
#endif
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
return retval;
}
void
SDL_EGL_UnloadLibrary(_THIS)
{
if (_this->egl_data) {
if (_this->egl_data->egl_display) {
_this->egl_data->eglTerminate(_this->egl_data->egl_display);
_this->egl_data->egl_display = NULL;
}
if (_this->egl_data->dll_handle) {
SDL_UnloadObject(_this->egl_data->dll_handle);
_this->egl_data->dll_handle = NULL;
}
if (_this->egl_data->egl_dll_handle) {
SDL_UnloadObject(_this->egl_data->egl_dll_handle);
_this->egl_data->egl_dll_handle = NULL;
}
SDL_free(_this->egl_data);
_this->egl_data = NULL;
}
}
int
287
SDL_EGL_LoadLibraryOnly(_THIS, const char *egl_path)
288
289
{
void *dll_handle = NULL, *egl_dll_handle = NULL; /* The naming is counter intuitive, but hey, I just work here -- Gabriel */
290
const char *path = NULL;
291
292
293
#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
const char *d3dcompiler;
#endif
294
295
296
#if SDL_VIDEO_DRIVER_RPI
SDL_bool vc4 = (0 == access("/sys/module/vc4/", F_OK));
#endif
297
298
if (_this->egl_data) {
299
return SDL_SetError("EGL context already created");
300
301
302
303
304
305
306
307
308
}
_this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData));
if (!_this->egl_data) {
return SDL_OutOfMemory();
}
#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
d3dcompiler = SDL_GetHint(SDL_HINT_VIDEO_WIN_D3DCOMPILER);
309
310
311
312
313
314
315
if (d3dcompiler) {
if (SDL_strcasecmp(d3dcompiler, "none") != 0) {
if (SDL_LoadObject(d3dcompiler) == NULL) {
SDL_ClearError();
}
}
} else {
316
if (WIN_IsWindowsVistaOrGreater()) {
317
318
319
320
321
322
323
324
325
326
327
328
/* Try the newer d3d compilers first */
const char *d3dcompiler_list[] = {
"d3dcompiler_47.dll", "d3dcompiler_46.dll",
};
int i;
for (i = 0; i < SDL_arraysize(d3dcompiler_list); ++i) {
if (SDL_LoadObject(d3dcompiler_list[i]) != NULL) {
break;
}
SDL_ClearError();
}
330
331
332
if (SDL_LoadObject("d3dcompiler_43.dll") == NULL) {
SDL_ClearError();
}
337
#ifndef SDL_VIDEO_STATIC_ANGLE
338
339
340
341
342
343
344
345
346
347
348
/* A funny thing, loading EGL.so first does not work on the Raspberry, so we load libGL* first */
path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
if (path != NULL) {
egl_dll_handle = SDL_LoadObject(path);
}
if (egl_dll_handle == NULL) {
if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
if (_this->gl_config.major_version > 1) {
path = DEFAULT_OGL_ES2;
egl_dll_handle = SDL_LoadObject(path);
349
#ifdef ALT_OGL_ES2
350
if (egl_dll_handle == NULL && !vc4) {
351
352
353
354
355
path = ALT_OGL_ES2;
egl_dll_handle = SDL_LoadObject(path);
}
#endif
356
357
358
359
360
361
362
} else {
path = DEFAULT_OGL_ES;
egl_dll_handle = SDL_LoadObject(path);
if (egl_dll_handle == NULL) {
path = DEFAULT_OGL_ES_PVR;
egl_dll_handle = SDL_LoadObject(path);
}
363
364
365
366
367
368
#ifdef ALT_OGL_ES2
if (egl_dll_handle == NULL && !vc4) {
path = ALT_OGL_ES2;
egl_dll_handle = SDL_LoadObject(path);
}
#endif
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
}
}
#ifdef DEFAULT_OGL
else {
path = DEFAULT_OGL;
egl_dll_handle = SDL_LoadObject(path);
}
#endif
}
_this->egl_data->egl_dll_handle = egl_dll_handle;
if (egl_dll_handle == NULL) {
return SDL_SetError("Could not initialize OpenGL / GLES library");
}
/* Loading libGL* in the previous step took care of loading libEGL.so, but we future proof by double checking */
if (egl_path != NULL) {
dll_handle = SDL_LoadObject(egl_path);
}
/* Try loading a EGL symbol, if it does not work try the default library paths */
if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
if (dll_handle != NULL) {
SDL_UnloadObject(dll_handle);
}
path = SDL_getenv("SDL_VIDEO_EGL_DRIVER");
if (path == NULL) {
path = DEFAULT_EGL;
}
dll_handle = SDL_LoadObject(path);
398
399
#ifdef ALT_EGL
400
if (dll_handle == NULL && !vc4) {
401
402
403
404
405
path = ALT_EGL;
dll_handle = SDL_LoadObject(path);
}
#endif
406
407
408
409
410
411
412
413
if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
if (dll_handle != NULL) {
SDL_UnloadObject(dll_handle);
}
return SDL_SetError("Could not load EGL library");
}
SDL_ClearError();
}
415
416
417
418
419
420
421
422
423
424
425
426
_this->egl_data->dll_handle = dll_handle;
/* 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);
427
LOAD_FUNC(eglCreatePbufferSurface);
428
429
430
431
432
433
434
435
LOAD_FUNC(eglCreateWindowSurface);
LOAD_FUNC(eglDestroySurface);
LOAD_FUNC(eglMakeCurrent);
LOAD_FUNC(eglSwapBuffers);
LOAD_FUNC(eglSwapInterval);
LOAD_FUNC(eglWaitNative);
LOAD_FUNC(eglWaitGL);
LOAD_FUNC(eglBindAPI);
436
LOAD_FUNC(eglQueryAPI);
437
LOAD_FUNC(eglQueryString);
438
LOAD_FUNC(eglGetError);
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
LOAD_FUNC_EGLEXT(eglQueryDevicesEXT);
LOAD_FUNC_EGLEXT(eglGetPlatformDisplayEXT);
_this->gl_config.driver_loaded = 1;
if (path) {
SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
} else {
*_this->gl_config.driver_path = '\0';
}
return 0;
}
int
SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_display, EGLenum platform)
{
int egl_version_major = 0, egl_version_minor = 0;
int library_load_retcode = SDL_EGL_LoadLibraryOnly(_this, egl_path);
if (library_load_retcode != 0) {
return library_load_retcode;
}
462
463
464
465
466
467
468
469
470
471
472
473
if (_this->egl_data->eglQueryString) {
/* EGL 1.5 allows querying for client version */
const char *egl_version = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_VERSION);
if (egl_version != NULL) {
if (SDL_sscanf(egl_version, "%d.%d", &egl_version_major, &egl_version_minor) != 2) {
egl_version_major = 0;
egl_version_minor = 0;
SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not parse EGL version string: %s", egl_version);
}
}
}
474
475
476
_this->egl_data->egl_version_major = egl_version_major;
_this->egl_data->egl_version_minor = egl_version_minor;
477
478
479
480
481
if (egl_version_major == 1 && egl_version_minor == 5) {
LOAD_FUNC(eglGetPlatformDisplay);
}
_this->egl_data->egl_display = EGL_NO_DISPLAY;
482
#if !defined(__WINRT__)
483
484
if (platform) {
if (egl_version_major == 1 && egl_version_minor == 5) {
485
_this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplay(platform, (void *)(size_t)native_display, NULL);
486
487
} else {
if (SDL_EGL_HasExtension(_this, SDL_EGL_CLIENT_EXTENSION, "EGL_EXT_platform_base")) {
488
_this->egl_data->eglGetPlatformDisplayEXT = SDL_EGL_GetProcAddress(_this, "eglGetPlatformDisplayEXT");
489
if (_this->egl_data->eglGetPlatformDisplayEXT) {
490
_this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(platform, (void *)(size_t)native_display, NULL);
491
492
493
494
495
496
497
498
499
}
}
}
}
/* Try the implementation-specific eglGetDisplay even if eglGetPlatformDisplay fails */
if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
_this->egl_data->egl_display = _this->egl_data->eglGetDisplay(native_display);
}
if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
500
501
_this->gl_config.driver_loaded = 0;
*_this->gl_config.driver_path = '\0';
502
503
504
505
return SDL_SetError("Could not get EGL display");
}
if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
506
507
_this->gl_config.driver_loaded = 0;
*_this->gl_config.driver_path = '\0';
508
509
510
511
return SDL_SetError("Could not initialize EGL");
}
#endif
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
_this->egl_data->is_offscreen = 0;
return 0;
}
/**
On multi GPU machines EGL device 0 is not always the first valid GPU.
Container environments can restrict access to some GPUs that are still listed in the EGL
device list. If the requested device is a restricted GPU and cannot be used
(eglInitialize() will fail) then attempt to automatically and silently select the next
valid available GPU for EGL to use.
*/
int
SDL_EGL_InitializeOffscreen(_THIS, int device)
{
528
void *egl_devices[SDL_EGL_MAX_DEVICES];
529
530
531
532
533
EGLint num_egl_devices = 0;
const char *egl_device_hint;
if (_this->gl_config.driver_loaded != 1) {
return SDL_SetError("SDL_EGL_LoadLibraryOnly() has not been called or has failed.");
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
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
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
/* Check for all extensions that are optional until used and fail if any is missing */
if (_this->egl_data->eglQueryDevicesEXT == NULL) {
return SDL_SetError("eglQueryDevicesEXT is missing (EXT_device_enumeration not supported by the drivers?)");
}
if (_this->egl_data->eglGetPlatformDisplayEXT == NULL) {
return SDL_SetError("eglGetPlatformDisplayEXT is missing (EXT_platform_base not supported by the drivers?)");
}
if (_this->egl_data->eglQueryDevicesEXT(SDL_EGL_MAX_DEVICES, egl_devices, &num_egl_devices) != EGL_TRUE) {
return SDL_SetError("eglQueryDevicesEXT() failed");
}
egl_device_hint = SDL_GetHint("SDL_HINT_EGL_DEVICE");
if (egl_device_hint) {
device = SDL_atoi(egl_device_hint);
if (device >= num_egl_devices) {
return SDL_SetError("Invalid EGL device is requested.");
}
_this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, egl_devices[device], NULL);
if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
return SDL_SetError("eglGetPlatformDisplayEXT() failed.");
}
if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
return SDL_SetError("Could not initialize EGL");
}
}
else {
int i;
SDL_bool found = SDL_FALSE;
EGLDisplay attempted_egl_display;
/* If no hint is provided lets look for the first device/display that will allow us to eglInit */
for (i = 0; i < num_egl_devices; i++) {
attempted_egl_display = _this->egl_data->eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, egl_devices[i], NULL);
if (attempted_egl_display == EGL_NO_DISPLAY) {
continue;
}
if (_this->egl_data->eglInitialize(attempted_egl_display, NULL, NULL) != EGL_TRUE) {
_this->egl_data->eglTerminate(attempted_egl_display);
continue;
}
/* We did not fail, we'll pick this one! */
_this->egl_data->egl_display = attempted_egl_display;
found = SDL_TRUE;
break;
}
if (!found) {
return SDL_SetError("Could not find a valid EGL device to initialize");
}
}
_this->egl_data->is_offscreen = 1;
599
600
601
return 0;
}
602
603
604
605
606
607
void
SDL_EGL_SetRequiredVisualId(_THIS, int visual_id)
{
_this->egl_data->egl_required_visual_id=visual_id;
}
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
#ifdef DUMP_EGL_CONFIG
#define ATTRIBUTE(_attr) { _attr, #_attr }
typedef struct {
EGLint attribute;
char const* name;
} Attribute;
Attribute attributes[] = {
ATTRIBUTE( EGL_BUFFER_SIZE ),
ATTRIBUTE( EGL_ALPHA_SIZE ),
ATTRIBUTE( EGL_BLUE_SIZE ),
ATTRIBUTE( EGL_GREEN_SIZE ),
ATTRIBUTE( EGL_RED_SIZE ),
ATTRIBUTE( EGL_DEPTH_SIZE ),
ATTRIBUTE( EGL_STENCIL_SIZE ),
ATTRIBUTE( EGL_CONFIG_CAVEAT ),
ATTRIBUTE( EGL_CONFIG_ID ),
ATTRIBUTE( EGL_LEVEL ),
ATTRIBUTE( EGL_MAX_PBUFFER_HEIGHT ),
ATTRIBUTE( EGL_MAX_PBUFFER_WIDTH ),
ATTRIBUTE( EGL_MAX_PBUFFER_PIXELS ),
ATTRIBUTE( EGL_NATIVE_RENDERABLE ),
ATTRIBUTE( EGL_NATIVE_VISUAL_ID ),
ATTRIBUTE( EGL_NATIVE_VISUAL_TYPE ),
ATTRIBUTE( EGL_SAMPLES ),
ATTRIBUTE( EGL_SAMPLE_BUFFERS ),
ATTRIBUTE( EGL_SURFACE_TYPE ),
ATTRIBUTE( EGL_TRANSPARENT_TYPE ),
ATTRIBUTE( EGL_TRANSPARENT_BLUE_VALUE ),
ATTRIBUTE( EGL_TRANSPARENT_GREEN_VALUE ),
ATTRIBUTE( EGL_TRANSPARENT_RED_VALUE ),
ATTRIBUTE( EGL_BIND_TO_TEXTURE_RGB ),
ATTRIBUTE( EGL_BIND_TO_TEXTURE_RGBA ),
ATTRIBUTE( EGL_MIN_SWAP_INTERVAL ),
ATTRIBUTE( EGL_MAX_SWAP_INTERVAL ),
ATTRIBUTE( EGL_LUMINANCE_SIZE ),
ATTRIBUTE( EGL_ALPHA_MASK_SIZE ),
ATTRIBUTE( EGL_COLOR_BUFFER_TYPE ),
ATTRIBUTE( EGL_RENDERABLE_TYPE ),
ATTRIBUTE( EGL_MATCH_NATIVE_PIXMAP ),
ATTRIBUTE( EGL_CONFORMANT ),
};
static void dumpconfig(_THIS, EGLConfig config)
{
int attr;
for (attr = 0 ; attr<sizeof(attributes)/sizeof(Attribute) ; attr++) {
EGLint value;
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, config, attributes[attr].attribute, &value);
SDL_Log("\t%-32s: %10d (0x%08x)\n", attributes[attr].name, value, value);
}
}
#endif /* DUMP_EGL_CONFIG */
666
667
668
int
SDL_EGL_ChooseConfig(_THIS)
{
669
/* 64 seems nice. */
670
671
672
673
674
EGLint attribs[64];
EGLint found_configs = 0, value;
/* 128 seems even nicer here */
EGLConfig configs[128];
int i, j, best_bitdiff = -1, bitdiff;
676
677
678
679
680
681
682
683
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
if (!_this->egl_data) {
/* The EGL library wasn't loaded, SDL_GetError() should have info */
return -1;
}
/* Get a valid EGL configuration */
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;
}
718
719
720
721
722
if (_this->egl_data->is_offscreen) {
attribs[i++] = EGL_SURFACE_TYPE;
attribs[i++] = EGL_PBUFFER_BIT;
}
723
724
725
726
attribs[i++] = EGL_RENDERABLE_TYPE;
if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
#ifdef EGL_KHR_create_context
if (_this->gl_config.major_version >= 3 &&
727
SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
728
729
730
731
732
733
734
735
736
737
738
739
740
attribs[i++] = EGL_OPENGL_ES3_BIT_KHR;
} else
#endif
if (_this->gl_config.major_version >= 2) {
attribs[i++] = EGL_OPENGL_ES2_BIT;
} else {
attribs[i++] = EGL_OPENGL_ES_BIT;
}
_this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
} else {
attribs[i++] = EGL_OPENGL_BIT;
_this->egl_data->eglBindAPI(EGL_OPENGL_API);
}
742
743
744
745
746
if (_this->egl_data->egl_surfacetype) {
attribs[i++] = EGL_SURFACE_TYPE;
attribs[i++] = _this->egl_data->egl_surfacetype;
}
747
attribs[i++] = EGL_NONE;
749
750
751
752
753
if (_this->egl_data->eglChooseConfig(_this->egl_data->egl_display,
attribs,
configs, SDL_arraysize(configs),
&found_configs) == EGL_FALSE ||
found_configs == 0) {
754
return SDL_EGL_SetError("Couldn't find matching EGL config", "eglChooseConfig");
757
758
759
760
/* eglChooseConfig returns a number of configurations that match or exceed the requested attribs. */
/* From those, we select the one that matches our requirements more closely via a makeshift algorithm */
for (i = 0; i < found_configs; i++ ) {
761
762
763
764
765
766
767
768
769
770
if (_this->egl_data->egl_required_visual_id)
{
EGLint format;
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
configs[i],
EGL_NATIVE_VISUAL_ID, &format);
if (_this->egl_data->egl_required_visual_id != format)
continue;
}
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
bitdiff = 0;
for (j = 0; j < SDL_arraysize(attribs) - 1; j += 2) {
if (attribs[j] == EGL_NONE) {
break;
}
if ( attribs[j+1] != EGL_DONT_CARE && (
attribs[j] == EGL_RED_SIZE ||
attribs[j] == EGL_GREEN_SIZE ||
attribs[j] == EGL_BLUE_SIZE ||
attribs[j] == EGL_ALPHA_SIZE ||
attribs[j] == EGL_DEPTH_SIZE ||
attribs[j] == EGL_STENCIL_SIZE)) {
_this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], attribs[j], &value);
bitdiff += value - attribs[j + 1]; /* value is always >= attrib */
}
}
if (bitdiff < best_bitdiff || best_bitdiff == -1) {
_this->egl_data->egl_config = configs[i];
best_bitdiff = bitdiff;
}
if (bitdiff == 0) {
break; /* we found an exact match! */
}
}
799
800
801
802
#ifdef DUMP_EGL_CONFIG
dumpconfig(_this, _this->egl_data->egl_config);
#endif
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
return 0;
}
SDL_GLContext
SDL_EGL_CreateContext(_THIS, EGLSurface egl_surface)
{
/* max 14 values plus terminator. */
EGLint attribs[15];
int attr = 0;
EGLContext egl_context, share_context = EGL_NO_CONTEXT;
EGLint profile_mask = _this->gl_config.profile_mask;
EGLint major_version = _this->gl_config.major_version;
EGLint minor_version = _this->gl_config.minor_version;
SDL_bool profile_es = (profile_mask == SDL_GL_CONTEXT_PROFILE_ES);
if (!_this->egl_data) {
/* The EGL library wasn't loaded, SDL_GetError() should have info */
return NULL;
}
if (_this->gl_config.share_with_current_context) {
share_context = (EGLContext)SDL_GL_GetCurrentContext();
}
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
#if SDL_VIDEO_DRIVER_ANDROID
if ((_this->gl_config.flags & SDL_GL_CONTEXT_DEBUG_FLAG) != 0) {
/* If SDL_GL_CONTEXT_DEBUG_FLAG is set but EGL_KHR_debug unsupported, unset.
* This is required because some Android devices like to complain about it
* by "silently" failing, logging a hint which could be easily overlooked:
* E/libEGL (26984): validate_display:255 error 3008 (EGL_BAD_DISPLAY)
* The following explicitly checks for EGL_KHR_debug before EGL 1.5
*/
int egl_version_major = _this->egl_data->egl_version_major;
int egl_version_minor = _this->egl_data->egl_version_minor;
if (((egl_version_major < 1) || (egl_version_major == 1 && egl_version_minor < 5)) &&
!SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_debug")) {
/* SDL profile bits match EGL profile bits. */
_this->gl_config.flags &= ~SDL_GL_CONTEXT_DEBUG_FLAG;
}
}
#endif
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
/* Set the context version and other attributes. */
if ((major_version < 3 || (minor_version == 0 && profile_es)) &&
_this->gl_config.flags == 0 &&
(profile_mask == 0 || profile_es)) {
/* Create a context without using EGL_KHR_create_context attribs.
* When creating a GLES context without EGL_KHR_create_context we can
* only specify the major version. When creating a desktop GL context
* we can't specify any version, so we only try in that case when the
* version is less than 3.0 (matches SDL's GLX/WGL behavior.)
*/
if (profile_es) {
attribs[attr++] = EGL_CONTEXT_CLIENT_VERSION;
attribs[attr++] = SDL_max(major_version, 1);
}
} else {
#ifdef EGL_KHR_create_context
/* The Major/minor version, context profiles, and context flags can
* only be specified when this extension is available.
*/
866
if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
attribs[attr++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
attribs[attr++] = major_version;
attribs[attr++] = EGL_CONTEXT_MINOR_VERSION_KHR;
attribs[attr++] = minor_version;
/* SDL profile bits match EGL profile bits. */
if (profile_mask != 0 && profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
attribs[attr++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
attribs[attr++] = profile_mask;
}
/* SDL flags match EGL flags. */
if (_this->gl_config.flags != 0) {
attribs[attr++] = EGL_CONTEXT_FLAGS_KHR;
attribs[attr++] = _this->gl_config.flags;
}
} else
#endif /* EGL_KHR_create_context */
{
SDL_SetError("Could not create EGL context (context attributes are not supported)");
return NULL;
}
}
891
892
893
894
895
896
897
898
899
900
901
902
903
if (_this->gl_config.no_error) {
#ifdef EGL_KHR_create_context_no_error
if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context_no_error")) {
attribs[attr++] = EGL_CONTEXT_OPENGL_NO_ERROR_KHR;
attribs[attr++] = _this->gl_config.no_error;
} else
#endif
{
SDL_SetError("EGL implementation does not support no_error contexts");
return NULL;
}
}
904
905
906
907
908
909
910
911
912
913
914
915
916
917
attribs[attr++] = EGL_NONE;
/* Bind the API */
if (profile_es) {
_this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
} else {
_this->egl_data->eglBindAPI(EGL_OPENGL_API);
}
egl_context = _this->egl_data->eglCreateContext(_this->egl_data->egl_display,
_this->egl_data->egl_config,
share_context, attribs);
if (egl_context == EGL_NO_CONTEXT) {
918
SDL_EGL_SetError("Could not create EGL context", "eglCreateContext");
919
920
921
922
923
924
return NULL;
}
_this->egl_data->egl_swapinterval = 0;
if (SDL_EGL_MakeCurrent(_this, egl_surface, egl_context) < 0) {
925
926
927
928
929
/* Save the SDL error set by SDL_EGL_MakeCurrent */
char errorText[1024];
SDL_strlcpy(errorText, SDL_GetError(), SDL_arraysize(errorText));
/* Delete the context, which may alter the value returned by SDL_GetError() */
930
SDL_EGL_DeleteContext(_this, egl_context);
931
932
933
934
/* Restore the SDL error */
SDL_SetError("%s", errorText);
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
return NULL;
}
return (SDL_GLContext) egl_context;
}
int
SDL_EGL_MakeCurrent(_THIS, EGLSurface egl_surface, SDL_GLContext context)
{
EGLContext egl_context = (EGLContext) context;
if (!_this->egl_data) {
return SDL_SetError("OpenGL not initialized");
}
/* The android emulator crashes badly if you try to eglMakeCurrent
* with a valid context and invalid surface, so we have to check for both here.
*/
if (!egl_context || !egl_surface) {
_this->egl_data->eglMakeCurrent(_this->egl_data->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
} else {
if (!_this->egl_data->eglMakeCurrent(_this->egl_data->egl_display,
egl_surface, egl_surface, egl_context)) {
958
return SDL_EGL_SetError("Unable to make EGL context current", "eglMakeCurrent");
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
}
}
return 0;
}
int
SDL_EGL_SetSwapInterval(_THIS, int interval)
{
EGLBoolean status;
if (!_this->egl_data) {
return SDL_SetError("EGL not initialized");
}
status = _this->egl_data->eglSwapInterval(_this->egl_data->egl_display, interval);
if (status == EGL_TRUE) {
_this->egl_data->egl_swapinterval = interval;
return 0;
}
980
return SDL_EGL_SetError("Unable to set the EGL swap interval", "eglSwapInterval");
981
982
983
984
985
986
}
int
SDL_EGL_GetSwapInterval(_THIS)
{
if (!_this->egl_data) {
987
988
SDL_SetError("EGL not initialized");
return 0;
989
990
991
992
993
}
return _this->egl_data->egl_swapinterval;
}
995
996
SDL_EGL_SwapBuffers(_THIS, EGLSurface egl_surface)
{
997
if (!_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, egl_surface)) {
998
return SDL_EGL_SetError("unable to show color buffer in an OS-native window", "eglSwapBuffers");
999
1000
}
return 0;