1 /*
2 * Simple DirectMedia Layer
3 * Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4 *
5 * This software is provided 'as-is', without any express or implied
6 * warranty. In no event will the authors be held liable for any damages
7 * arising from the use of this software.
8 *
9 * Permission is granted to anyone to use this software for any purpose,
10 * including commercial applications, and to alter it and redistribute it
11 * freely, subject to the following restrictions:
12 *
13 * 1. The origin of this software must not be misrepresented; you must not
14 * claim that you wrote the original software. If you use this software
15 * in a product, an acknowledgment in the product documentation would be
16 * appreciated but is not required.
17 * 2. Altered source versions must be plainly marked as such, and must not be
18 * misrepresented as being the original software.
19 * 3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../SDL_internal.h"
22
23 #if SDL_VIDEO_OPENGL_EGL
24
25 #if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
26 #include "../core/windows/SDL_windows.h"
27 #endif
28 #if SDL_VIDEO_DRIVER_ANDROID
29 #include <android/native_window.h>
30 #include "../core/android/SDL_android.h"
31 #endif
32
33 #include "SDL_sysvideo.h"
34 #include "SDL_egl_c.h"
35 #include "SDL_loadso.h"
36 #include "SDL_hints.h"
37
38 #ifdef EGL_KHR_create_context
39 /* EGL_OPENGL_ES3_BIT_KHR was added in version 13 of the extension. */
40 #ifndef EGL_OPENGL_ES3_BIT_KHR
41 #define EGL_OPENGL_ES3_BIT_KHR 0x00000040
42 #endif
43 #endif /* EGL_KHR_create_context */
44
45 #if SDL_VIDEO_DRIVER_RPI
46 /* Raspbian places the OpenGL ES/EGL binaries in a non standard path */
47 #define DEFAULT_EGL ( vc4 ? "libEGL.so.1" : "libbrcmEGL.so" )
48 #define DEFAULT_OGL_ES2 ( vc4 ? "libGLESv2.so.2" : "libbrcmGLESv2.so" )
49 #define ALT_EGL "libEGL.so"
50 #define ALT_OGL_ES2 "libGLESv2.so"
51 #define DEFAULT_OGL_ES_PVR ( vc4 ? "libGLES_CM.so.1" : "libbrcmGLESv2.so" )
52 #define DEFAULT_OGL_ES ( vc4 ? "libGLESv1_CM.so.1" : "libbrcmGLESv2.so" )
53
54 #elif SDL_VIDEO_DRIVER_ANDROID || SDL_VIDEO_DRIVER_VIVANTE
55 /* Android */
56 #define DEFAULT_EGL "libEGL.so"
57 #define DEFAULT_OGL_ES2 "libGLESv2.so"
58 #define DEFAULT_OGL_ES_PVR "libGLES_CM.so"
59 #define DEFAULT_OGL_ES "libGLESv1_CM.so"
60
61 #elif SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
62 /* EGL AND OpenGL ES support via ANGLE */
63 #define DEFAULT_EGL "libEGL.dll"
64 #define DEFAULT_OGL_ES2 "libGLESv2.dll"
65 #define DEFAULT_OGL_ES_PVR "libGLES_CM.dll"
66 #define DEFAULT_OGL_ES "libGLESv1_CM.dll"
67
68 #elif SDL_VIDEO_DRIVER_COCOA
69 /* EGL AND OpenGL ES support via ANGLE */
70 #define DEFAULT_EGL "libEGL.dylib"
71 #define DEFAULT_OGL_ES2 "libGLESv2.dylib"
72 #define DEFAULT_OGL_ES_PVR "libGLES_CM.dylib" //???
73 #define DEFAULT_OGL_ES "libGLESv1_CM.dylib" //???
74
75 #else
76 /* Desktop Linux */
77 #define DEFAULT_OGL "libGL.so.1"
78 #define DEFAULT_EGL "libEGL.so.1"
79 #define DEFAULT_OGL_ES2 "libGLESv2.so.2"
80 #define DEFAULT_OGL_ES_PVR "libGLES_CM.so.1"
81 #define DEFAULT_OGL_ES "libGLESv1_CM.so.1"
82 #endif /* SDL_VIDEO_DRIVER_RPI */
83
84 #if SDL_VIDEO_OPENGL
85 #include "SDL_opengl.h"
86 #endif
87
88 /** If we happen to not have this defined because of an older EGL version, just define it 0x0
89 as eglGetPlatformDisplayEXT will most likely be NULL if this is missing
90 */
91 #ifndef EGL_PLATFORM_DEVICE_EXT
92 #define EGL_PLATFORM_DEVICE_EXT 0x0
93 #endif
94
95 #ifdef SDL_VIDEO_STATIC_ANGLE
96 #define LOAD_FUNC(NAME) \
97 _this->egl_data->NAME = (void *)NAME;
98 #else
99 #define LOAD_FUNC(NAME) \
100 _this->egl_data->NAME = SDL_LoadFunction(_this->egl_data->dll_handle, #NAME); \
101 if (!_this->egl_data->NAME) \
102 { \
103 return SDL_SetError("Could not retrieve EGL function " #NAME); \
104 }
105 #endif
106
107 /* it is allowed to not have some of the EGL extensions on start - attempts to use them will fail later. */
108 #define LOAD_FUNC_EGLEXT(NAME) \
109 _this->egl_data->NAME = _this->egl_data->eglGetProcAddress(#NAME);
110
111
SDL_EGL_GetErrorName(EGLint eglErrorCode)112 static const char * SDL_EGL_GetErrorName(EGLint eglErrorCode)
113 {
114 #define SDL_EGL_ERROR_TRANSLATE(e) case e: return #e;
115 switch (eglErrorCode) {
116 SDL_EGL_ERROR_TRANSLATE(EGL_SUCCESS);
117 SDL_EGL_ERROR_TRANSLATE(EGL_NOT_INITIALIZED);
118 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ACCESS);
119 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ALLOC);
120 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_ATTRIBUTE);
121 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONTEXT);
122 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CONFIG);
123 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_CURRENT_SURFACE);
124 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_DISPLAY);
125 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_SURFACE);
126 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_MATCH);
127 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_PARAMETER);
128 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_PIXMAP);
129 SDL_EGL_ERROR_TRANSLATE(EGL_BAD_NATIVE_WINDOW);
130 SDL_EGL_ERROR_TRANSLATE(EGL_CONTEXT_LOST);
131 }
132 return "";
133 }
134
SDL_EGL_SetErrorEx(const char * message,const char * eglFunctionName,EGLint eglErrorCode)135 int SDL_EGL_SetErrorEx(const char * message, const char * eglFunctionName, EGLint eglErrorCode)
136 {
137 const char * errorText = SDL_EGL_GetErrorName(eglErrorCode);
138 char altErrorText[32];
139 if (errorText[0] == '\0') {
140 /* An unknown-to-SDL error code was reported. Report its hexadecimal value, instead of its name. */
141 SDL_snprintf(altErrorText, SDL_arraysize(altErrorText), "0x%x", (unsigned int)eglErrorCode);
142 errorText = altErrorText;
143 }
144 return SDL_SetError("%s (call to %s failed, reporting an error of %s)", message, eglFunctionName, errorText);
145 }
146
147 /* EGL implementation of SDL OpenGL ES support */
148 typedef enum {
149 SDL_EGL_DISPLAY_EXTENSION,
150 SDL_EGL_CLIENT_EXTENSION
151 } SDL_EGL_ExtensionType;
152
SDL_EGL_HasExtension(_THIS,SDL_EGL_ExtensionType type,const char * ext)153 static SDL_bool SDL_EGL_HasExtension(_THIS, SDL_EGL_ExtensionType type, const char *ext)
154 {
155 size_t ext_len;
156 const char *ext_override;
157 const char *egl_extstr;
158 const char *ext_start;
159
160 /* Invalid extensions can be rejected early */
161 if (ext == NULL || *ext == 0 || SDL_strchr(ext, ' ') != NULL) {
162 /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid EGL extension"); */
163 return SDL_FALSE;
164 }
165
166 /* Extensions can be masked with an environment variable.
167 * Unlike the OpenGL override, this will use the set bits of an integer
168 * to disable the extension.
169 * Bit Action
170 * 0 If set, the display extension is masked and not present to SDL.
171 * 1 If set, the client extension is masked and not present to SDL.
172 */
173 ext_override = SDL_getenv(ext);
174 if (ext_override != NULL) {
175 int disable_ext = SDL_atoi(ext_override);
176 if (disable_ext & 0x01 && type == SDL_EGL_DISPLAY_EXTENSION) {
177 return SDL_FALSE;
178 } else if (disable_ext & 0x02 && type == SDL_EGL_CLIENT_EXTENSION) {
179 return SDL_FALSE;
180 }
181 }
182
183 ext_len = SDL_strlen(ext);
184 switch (type) {
185 case SDL_EGL_DISPLAY_EXTENSION:
186 egl_extstr = _this->egl_data->eglQueryString(_this->egl_data->egl_display, EGL_EXTENSIONS);
187 break;
188 case SDL_EGL_CLIENT_EXTENSION:
189 /* EGL_EXT_client_extensions modifies eglQueryString to return client extensions
190 * if EGL_NO_DISPLAY is passed. Implementations without it are required to return NULL.
191 * This behavior is included in EGL 1.5.
192 */
193 egl_extstr = _this->egl_data->eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
194 break;
195 default:
196 /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "SDL_EGL_HasExtension: Invalid extension type"); */
197 return SDL_FALSE;
198 }
199
200 if (egl_extstr != NULL) {
201 ext_start = egl_extstr;
202
203 while (*ext_start) {
204 ext_start = SDL_strstr(ext_start, ext);
205 if (ext_start == NULL) {
206 return SDL_FALSE;
207 }
208 /* Check if the match is not just a substring of one of the extensions */
209 if (ext_start == egl_extstr || *(ext_start - 1) == ' ') {
210 if (ext_start[ext_len] == ' ' || ext_start[ext_len] == 0) {
211 return SDL_TRUE;
212 }
213 }
214 /* If the search stopped in the middle of an extension, skip to the end of it */
215 ext_start += ext_len;
216 while (*ext_start != ' ' && *ext_start != 0) {
217 ext_start++;
218 }
219 }
220 }
221
222 return SDL_FALSE;
223 }
224
225 void *
SDL_EGL_GetProcAddress(_THIS,const char * proc)226 SDL_EGL_GetProcAddress(_THIS, const char *proc)
227 {
228 const Uint32 eglver = (((Uint32) _this->egl_data->egl_version_major) << 16) | ((Uint32) _this->egl_data->egl_version_minor);
229 const SDL_bool is_egl_15_or_later = eglver >= ((((Uint32) 1) << 16) | 5);
230 void *retval = NULL;
231
232 /* EGL 1.5 can use eglGetProcAddress() for any symbol. 1.4 and earlier can't use it for core entry points. */
233 if (!retval && is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
234 retval = _this->egl_data->eglGetProcAddress(proc);
235 }
236
237 #ifndef __EMSCRIPTEN__ /* LoadFunction isn't needed on Emscripten and will call dlsym(), causing other problems. */
238 /* Try SDL_LoadFunction() first for EGL <= 1.4, or as a fallback for >= 1.5. */
239 if (!retval) {
240 static char procname[64];
241 retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, proc);
242 /* just in case you need an underscore prepended... */
243 if (!retval && (SDL_strlen(proc) < (sizeof (procname) - 1))) {
244 procname[0] = '_';
245 SDL_strlcpy(procname + 1, proc, sizeof (procname) - 1);
246 retval = SDL_LoadFunction(_this->egl_data->egl_dll_handle, procname);
247 }
248 }
249 #endif
250
251 /* Try eglGetProcAddress if we're on <= 1.4 and still searching... */
252 if (!retval && !is_egl_15_or_later && _this->egl_data->eglGetProcAddress) {
253 retval = _this->egl_data->eglGetProcAddress(proc);
254 if (retval) {
255 return retval;
256 }
257 }
258
259 return retval;
260 }
261
262 void
SDL_EGL_UnloadLibrary(_THIS)263 SDL_EGL_UnloadLibrary(_THIS)
264 {
265 if (_this->egl_data) {
266 if (_this->egl_data->egl_display) {
267 _this->egl_data->eglTerminate(_this->egl_data->egl_display);
268 _this->egl_data->egl_display = NULL;
269 }
270
271 if (_this->egl_data->dll_handle) {
272 SDL_UnloadObject(_this->egl_data->dll_handle);
273 _this->egl_data->dll_handle = NULL;
274 }
275 if (_this->egl_data->egl_dll_handle) {
276 SDL_UnloadObject(_this->egl_data->egl_dll_handle);
277 _this->egl_data->egl_dll_handle = NULL;
278 }
279
280 SDL_free(_this->egl_data);
281 _this->egl_data = NULL;
282 }
283 }
284
285 int
SDL_EGL_LoadLibraryOnly(_THIS,const char * egl_path)286 SDL_EGL_LoadLibraryOnly(_THIS, const char *egl_path)
287 {
288 void *dll_handle = NULL, *egl_dll_handle = NULL; /* The naming is counter intuitive, but hey, I just work here -- Gabriel */
289 const char *path = NULL;
290 #if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
291 const char *d3dcompiler;
292 #endif
293 #if SDL_VIDEO_DRIVER_RPI
294 SDL_bool vc4 = (0 == access("/sys/module/vc4/", F_OK));
295 #endif
296
297 if (_this->egl_data) {
298 return SDL_SetError("EGL context already created");
299 }
300
301 _this->egl_data = (struct SDL_EGL_VideoData *) SDL_calloc(1, sizeof(SDL_EGL_VideoData));
302 if (!_this->egl_data) {
303 return SDL_OutOfMemory();
304 }
305
306 #if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT
307 d3dcompiler = SDL_GetHint(SDL_HINT_VIDEO_WIN_D3DCOMPILER);
308 if (d3dcompiler) {
309 if (SDL_strcasecmp(d3dcompiler, "none") != 0) {
310 if (SDL_LoadObject(d3dcompiler) == NULL) {
311 SDL_ClearError();
312 }
313 }
314 } else {
315 if (WIN_IsWindowsVistaOrGreater()) {
316 /* Try the newer d3d compilers first */
317 const char *d3dcompiler_list[] = {
318 "d3dcompiler_47.dll", "d3dcompiler_46.dll",
319 };
320 int i;
321
322 for (i = 0; i < SDL_arraysize(d3dcompiler_list); ++i) {
323 if (SDL_LoadObject(d3dcompiler_list[i]) != NULL) {
324 break;
325 }
326 SDL_ClearError();
327 }
328 } else {
329 if (SDL_LoadObject("d3dcompiler_43.dll") == NULL) {
330 SDL_ClearError();
331 }
332 }
333 }
334 #endif
335
336 #ifndef SDL_VIDEO_STATIC_ANGLE
337 /* A funny thing, loading EGL.so first does not work on the Raspberry, so we load libGL* first */
338 path = SDL_getenv("SDL_VIDEO_GL_DRIVER");
339 if (path != NULL) {
340 egl_dll_handle = SDL_LoadObject(path);
341 }
342
343 if (egl_dll_handle == NULL) {
344 if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
345 if (_this->gl_config.major_version > 1) {
346 path = DEFAULT_OGL_ES2;
347 egl_dll_handle = SDL_LoadObject(path);
348 #ifdef ALT_OGL_ES2
349 if (egl_dll_handle == NULL && !vc4) {
350 path = ALT_OGL_ES2;
351 egl_dll_handle = SDL_LoadObject(path);
352 }
353 #endif
354
355 } else {
356 path = DEFAULT_OGL_ES;
357 egl_dll_handle = SDL_LoadObject(path);
358 if (egl_dll_handle == NULL) {
359 path = DEFAULT_OGL_ES_PVR;
360 egl_dll_handle = SDL_LoadObject(path);
361 }
362 #ifdef ALT_OGL_ES2
363 if (egl_dll_handle == NULL && !vc4) {
364 path = ALT_OGL_ES2;
365 egl_dll_handle = SDL_LoadObject(path);
366 }
367 #endif
368 }
369 }
370 #ifdef DEFAULT_OGL
371 else {
372 path = DEFAULT_OGL;
373 egl_dll_handle = SDL_LoadObject(path);
374 }
375 #endif
376 }
377 _this->egl_data->egl_dll_handle = egl_dll_handle;
378
379 if (egl_dll_handle == NULL) {
380 return SDL_SetError("Could not initialize OpenGL / GLES library");
381 }
382
383 /* Loading libGL* in the previous step took care of loading libEGL.so, but we future proof by double checking */
384 if (egl_path != NULL) {
385 dll_handle = SDL_LoadObject(egl_path);
386 }
387 /* Try loading a EGL symbol, if it does not work try the default library paths */
388 if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
389 if (dll_handle != NULL) {
390 SDL_UnloadObject(dll_handle);
391 }
392 path = SDL_getenv("SDL_VIDEO_EGL_DRIVER");
393 if (path == NULL) {
394 path = DEFAULT_EGL;
395 }
396 dll_handle = SDL_LoadObject(path);
397
398 #ifdef ALT_EGL
399 if (dll_handle == NULL && !vc4) {
400 path = ALT_EGL;
401 dll_handle = SDL_LoadObject(path);
402 }
403 #endif
404
405 if (dll_handle == NULL || SDL_LoadFunction(dll_handle, "eglChooseConfig") == NULL) {
406 if (dll_handle != NULL) {
407 SDL_UnloadObject(dll_handle);
408 }
409 return SDL_SetError("Could not load EGL library");
410 }
411 SDL_ClearError();
412 }
413 #endif
414
415 _this->egl_data->dll_handle = dll_handle;
416
417 /* Load new function pointers */
418 LOAD_FUNC(eglGetDisplay);
419 LOAD_FUNC(eglInitialize);
420 LOAD_FUNC(eglTerminate);
421 LOAD_FUNC(eglGetProcAddress);
422 LOAD_FUNC(eglChooseConfig);
423 LOAD_FUNC(eglGetConfigAttrib);
424 LOAD_FUNC(eglCreateContext);
425 LOAD_FUNC(eglDestroyContext);
426 LOAD_FUNC(eglCreatePbufferSurface);
427 LOAD_FUNC(eglCreateWindowSurface);
428 LOAD_FUNC(eglDestroySurface);
429 LOAD_FUNC(eglMakeCurrent);
430 LOAD_FUNC(eglSwapBuffers);
431 LOAD_FUNC(eglSwapInterval);
432 LOAD_FUNC(eglWaitNative);
433 LOAD_FUNC(eglWaitGL);
434 LOAD_FUNC(eglBindAPI);
435 LOAD_FUNC(eglQueryAPI);
436 LOAD_FUNC(eglQueryString);
437 LOAD_FUNC(eglGetError);
438 LOAD_FUNC_EGLEXT(eglQueryDevicesEXT);
439 LOAD_FUNC_EGLEXT(eglGetPlatformDisplayEXT);
440
441 _this->gl_config.driver_loaded = 1;
442
443 if (path) {
444 SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
445 } else {
446 *_this->gl_config.driver_path = '\0';
447 }
448
449 return 0;
450 }
451
452 static void
SDL_EGL_GetVersion(_THIS)453 SDL_EGL_GetVersion(_THIS) {
454 if (_this->egl_data->eglQueryString) {
455 const char *egl_version = _this->egl_data->eglQueryString(_this->egl_data->egl_display, EGL_VERSION);
456 if (egl_version) {
457 int major = 0, minor = 0;
458 if (SDL_sscanf(egl_version, "%d.%d", &major, &minor) == 2) {
459 _this->egl_data->egl_version_major = major;
460 _this->egl_data->egl_version_minor = minor;
461 } else {
462 SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not parse EGL version string: %s", egl_version);
463 }
464 }
465 }
466 }
467
468 int
SDL_EGL_LoadLibrary(_THIS,const char * egl_path,NativeDisplayType native_display,EGLenum platform)469 SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_display, EGLenum platform)
470 {
471 int egl_version_major, egl_version_minor;
472 int library_load_retcode = SDL_EGL_LoadLibraryOnly(_this, egl_path);
473 if (library_load_retcode != 0) {
474 return library_load_retcode;
475 }
476
477 /* EGL 1.5 allows querying for client version with EGL_NO_DISPLAY */
478 SDL_EGL_GetVersion(_this);
479
480 egl_version_major = _this->egl_data->egl_version_major;
481 egl_version_minor = _this->egl_data->egl_version_minor;
482
483 if (egl_version_major == 1 && egl_version_minor == 5) {
484 LOAD_FUNC(eglGetPlatformDisplay);
485 }
486
487 _this->egl_data->egl_display = EGL_NO_DISPLAY;
488 #if !defined(__WINRT__)
489 if (platform) {
490 if (egl_version_major == 1 && egl_version_minor == 5) {
491 _this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplay(platform, (void *)(size_t)native_display, NULL);
492 } else {
493 if (SDL_EGL_HasExtension(_this, SDL_EGL_CLIENT_EXTENSION, "EGL_EXT_platform_base")) {
494 _this->egl_data->eglGetPlatformDisplayEXT = SDL_EGL_GetProcAddress(_this, "eglGetPlatformDisplayEXT");
495 if (_this->egl_data->eglGetPlatformDisplayEXT) {
496 _this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(platform, (void *)(size_t)native_display, NULL);
497 }
498 }
499 }
500 }
501 /* Try the implementation-specific eglGetDisplay even if eglGetPlatformDisplay fails */
502 if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
503 _this->egl_data->egl_display = _this->egl_data->eglGetDisplay(native_display);
504 }
505 if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
506 _this->gl_config.driver_loaded = 0;
507 *_this->gl_config.driver_path = '\0';
508 return SDL_SetError("Could not get EGL display");
509 }
510
511 if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
512 _this->gl_config.driver_loaded = 0;
513 *_this->gl_config.driver_path = '\0';
514 return SDL_SetError("Could not initialize EGL");
515 }
516 #endif
517
518 /* Get the EGL version with a valid egl_display, for EGL <= 1.4 */
519 SDL_EGL_GetVersion(_this);
520
521 _this->egl_data->is_offscreen = 0;
522
523 return 0;
524 }
525
526 /**
527 On multi GPU machines EGL device 0 is not always the first valid GPU.
528 Container environments can restrict access to some GPUs that are still listed in the EGL
529 device list. If the requested device is a restricted GPU and cannot be used
530 (eglInitialize() will fail) then attempt to automatically and silently select the next
531 valid available GPU for EGL to use.
532 */
533
534 int
SDL_EGL_InitializeOffscreen(_THIS,int device)535 SDL_EGL_InitializeOffscreen(_THIS, int device)
536 {
537 void *egl_devices[SDL_EGL_MAX_DEVICES];
538 EGLint num_egl_devices = 0;
539 const char *egl_device_hint;
540
541 if (_this->gl_config.driver_loaded != 1) {
542 return SDL_SetError("SDL_EGL_LoadLibraryOnly() has not been called or has failed.");
543 }
544
545 /* Check for all extensions that are optional until used and fail if any is missing */
546 if (_this->egl_data->eglQueryDevicesEXT == NULL) {
547 return SDL_SetError("eglQueryDevicesEXT is missing (EXT_device_enumeration not supported by the drivers?)");
548 }
549
550 if (_this->egl_data->eglGetPlatformDisplayEXT == NULL) {
551 return SDL_SetError("eglGetPlatformDisplayEXT is missing (EXT_platform_base not supported by the drivers?)");
552 }
553
554 if (_this->egl_data->eglQueryDevicesEXT(SDL_EGL_MAX_DEVICES, egl_devices, &num_egl_devices) != EGL_TRUE) {
555 return SDL_SetError("eglQueryDevicesEXT() failed");
556 }
557
558 egl_device_hint = SDL_GetHint("SDL_HINT_EGL_DEVICE");
559 if (egl_device_hint) {
560 device = SDL_atoi(egl_device_hint);
561
562 if (device >= num_egl_devices) {
563 return SDL_SetError("Invalid EGL device is requested.");
564 }
565
566 _this->egl_data->egl_display = _this->egl_data->eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, egl_devices[device], NULL);
567
568 if (_this->egl_data->egl_display == EGL_NO_DISPLAY) {
569 return SDL_SetError("eglGetPlatformDisplayEXT() failed.");
570 }
571
572 if (_this->egl_data->eglInitialize(_this->egl_data->egl_display, NULL, NULL) != EGL_TRUE) {
573 return SDL_SetError("Could not initialize EGL");
574 }
575 }
576 else {
577 int i;
578 SDL_bool found = SDL_FALSE;
579 EGLDisplay attempted_egl_display;
580
581 /* If no hint is provided lets look for the first device/display that will allow us to eglInit */
582 for (i = 0; i < num_egl_devices; i++) {
583 attempted_egl_display = _this->egl_data->eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT, egl_devices[i], NULL);
584
585 if (attempted_egl_display == EGL_NO_DISPLAY) {
586 continue;
587 }
588
589 if (_this->egl_data->eglInitialize(attempted_egl_display, NULL, NULL) != EGL_TRUE) {
590 _this->egl_data->eglTerminate(attempted_egl_display);
591 continue;
592 }
593
594 /* We did not fail, we'll pick this one! */
595 _this->egl_data->egl_display = attempted_egl_display;
596 found = SDL_TRUE;
597
598 break;
599 }
600
601 if (!found) {
602 return SDL_SetError("Could not find a valid EGL device to initialize");
603 }
604 }
605
606 /* Get the EGL version with a valid egl_display, for EGL <= 1.4 */
607 SDL_EGL_GetVersion(_this);
608
609 _this->egl_data->is_offscreen = 1;
610
611 return 0;
612 }
613
614 void
SDL_EGL_SetRequiredVisualId(_THIS,int visual_id)615 SDL_EGL_SetRequiredVisualId(_THIS, int visual_id)
616 {
617 _this->egl_data->egl_required_visual_id=visual_id;
618 }
619
620 #ifdef DUMP_EGL_CONFIG
621
622 #define ATTRIBUTE(_attr) { _attr, #_attr }
623
624 typedef struct {
625 EGLint attribute;
626 char const* name;
627 } Attribute;
628
629 Attribute attributes[] = {
630 ATTRIBUTE( EGL_BUFFER_SIZE ),
631 ATTRIBUTE( EGL_ALPHA_SIZE ),
632 ATTRIBUTE( EGL_BLUE_SIZE ),
633 ATTRIBUTE( EGL_GREEN_SIZE ),
634 ATTRIBUTE( EGL_RED_SIZE ),
635 ATTRIBUTE( EGL_DEPTH_SIZE ),
636 ATTRIBUTE( EGL_STENCIL_SIZE ),
637 ATTRIBUTE( EGL_CONFIG_CAVEAT ),
638 ATTRIBUTE( EGL_CONFIG_ID ),
639 ATTRIBUTE( EGL_LEVEL ),
640 ATTRIBUTE( EGL_MAX_PBUFFER_HEIGHT ),
641 ATTRIBUTE( EGL_MAX_PBUFFER_WIDTH ),
642 ATTRIBUTE( EGL_MAX_PBUFFER_PIXELS ),
643 ATTRIBUTE( EGL_NATIVE_RENDERABLE ),
644 ATTRIBUTE( EGL_NATIVE_VISUAL_ID ),
645 ATTRIBUTE( EGL_NATIVE_VISUAL_TYPE ),
646 ATTRIBUTE( EGL_SAMPLES ),
647 ATTRIBUTE( EGL_SAMPLE_BUFFERS ),
648 ATTRIBUTE( EGL_SURFACE_TYPE ),
649 ATTRIBUTE( EGL_TRANSPARENT_TYPE ),
650 ATTRIBUTE( EGL_TRANSPARENT_BLUE_VALUE ),
651 ATTRIBUTE( EGL_TRANSPARENT_GREEN_VALUE ),
652 ATTRIBUTE( EGL_TRANSPARENT_RED_VALUE ),
653 ATTRIBUTE( EGL_BIND_TO_TEXTURE_RGB ),
654 ATTRIBUTE( EGL_BIND_TO_TEXTURE_RGBA ),
655 ATTRIBUTE( EGL_MIN_SWAP_INTERVAL ),
656 ATTRIBUTE( EGL_MAX_SWAP_INTERVAL ),
657 ATTRIBUTE( EGL_LUMINANCE_SIZE ),
658 ATTRIBUTE( EGL_ALPHA_MASK_SIZE ),
659 ATTRIBUTE( EGL_COLOR_BUFFER_TYPE ),
660 ATTRIBUTE( EGL_RENDERABLE_TYPE ),
661 ATTRIBUTE( EGL_MATCH_NATIVE_PIXMAP ),
662 ATTRIBUTE( EGL_CONFORMANT ),
663 };
664
665
dumpconfig(_THIS,EGLConfig config)666 static void dumpconfig(_THIS, EGLConfig config)
667 {
668 int attr;
669 for (attr = 0 ; attr<sizeof(attributes)/sizeof(Attribute) ; attr++) {
670 EGLint value;
671 _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, config, attributes[attr].attribute, &value);
672 SDL_Log("\t%-32s: %10d (0x%08x)\n", attributes[attr].name, value, value);
673 }
674 }
675
676 #endif /* DUMP_EGL_CONFIG */
677
678 int
SDL_EGL_ChooseConfig(_THIS)679 SDL_EGL_ChooseConfig(_THIS)
680 {
681 /* 64 seems nice. */
682 EGLint attribs[64];
683 EGLint found_configs = 0, value;
684 /* 128 seems even nicer here */
685 EGLConfig configs[128];
686 SDL_bool has_matching_format = SDL_FALSE;
687 int i, j, best_bitdiff = -1, bitdiff;
688
689 if (!_this->egl_data) {
690 /* The EGL library wasn't loaded, SDL_GetError() should have info */
691 return -1;
692 }
693
694 /* Get a valid EGL configuration */
695 i = 0;
696 attribs[i++] = EGL_RED_SIZE;
697 attribs[i++] = _this->gl_config.red_size;
698 attribs[i++] = EGL_GREEN_SIZE;
699 attribs[i++] = _this->gl_config.green_size;
700 attribs[i++] = EGL_BLUE_SIZE;
701 attribs[i++] = _this->gl_config.blue_size;
702
703 if (_this->gl_config.alpha_size) {
704 attribs[i++] = EGL_ALPHA_SIZE;
705 attribs[i++] = _this->gl_config.alpha_size;
706 }
707
708 if (_this->gl_config.buffer_size) {
709 attribs[i++] = EGL_BUFFER_SIZE;
710 attribs[i++] = _this->gl_config.buffer_size;
711 }
712
713 attribs[i++] = EGL_DEPTH_SIZE;
714 attribs[i++] = _this->gl_config.depth_size;
715
716 if (_this->gl_config.stencil_size) {
717 attribs[i++] = EGL_STENCIL_SIZE;
718 attribs[i++] = _this->gl_config.stencil_size;
719 }
720
721 if (_this->gl_config.multisamplebuffers) {
722 attribs[i++] = EGL_SAMPLE_BUFFERS;
723 attribs[i++] = _this->gl_config.multisamplebuffers;
724 }
725
726 if (_this->gl_config.multisamplesamples) {
727 attribs[i++] = EGL_SAMPLES;
728 attribs[i++] = _this->gl_config.multisamplesamples;
729 }
730
731 if (_this->egl_data->is_offscreen) {
732 attribs[i++] = EGL_SURFACE_TYPE;
733 attribs[i++] = EGL_PBUFFER_BIT;
734 }
735
736 attribs[i++] = EGL_RENDERABLE_TYPE;
737 if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES) {
738 #ifdef EGL_KHR_create_context
739 if (_this->gl_config.major_version >= 3 &&
740 SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
741 attribs[i++] = EGL_OPENGL_ES3_BIT_KHR;
742 } else
743 #endif
744 if (_this->gl_config.major_version >= 2) {
745 attribs[i++] = EGL_OPENGL_ES2_BIT;
746 } else {
747 attribs[i++] = EGL_OPENGL_ES_BIT;
748 }
749 _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
750 } else {
751 attribs[i++] = EGL_OPENGL_BIT;
752 _this->egl_data->eglBindAPI(EGL_OPENGL_API);
753 }
754
755 if (_this->egl_data->egl_surfacetype) {
756 attribs[i++] = EGL_SURFACE_TYPE;
757 attribs[i++] = _this->egl_data->egl_surfacetype;
758 }
759
760 attribs[i++] = EGL_NONE;
761
762 if (_this->egl_data->eglChooseConfig(_this->egl_data->egl_display,
763 attribs,
764 configs, SDL_arraysize(configs),
765 &found_configs) == EGL_FALSE ||
766 found_configs == 0) {
767 return SDL_EGL_SetError("Couldn't find matching EGL config", "eglChooseConfig");
768 }
769
770 /* first ensure that a found config has a matching format, or the function will fall through. */
771 for (i = 0; i < found_configs; i++ ) {
772 if (_this->egl_data->egl_required_visual_id)
773 {
774 EGLint format;
775 _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
776 configs[i],
777 EGL_NATIVE_VISUAL_ID, &format);
778 if (_this->egl_data->egl_required_visual_id == format)
779 has_matching_format = SDL_TRUE;
780 }
781 }
782
783 /* eglChooseConfig returns a number of configurations that match or exceed the requested attribs. */
784 /* From those, we select the one that matches our requirements more closely via a makeshift algorithm */
785
786 for (i = 0; i < found_configs; i++ ) {
787 if (has_matching_format && _this->egl_data->egl_required_visual_id)
788 {
789 EGLint format;
790 _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
791 configs[i],
792 EGL_NATIVE_VISUAL_ID, &format);
793 if (_this->egl_data->egl_required_visual_id != format)
794 continue;
795 }
796
797 bitdiff = 0;
798 for (j = 0; j < SDL_arraysize(attribs) - 1; j += 2) {
799 if (attribs[j] == EGL_NONE) {
800 break;
801 }
802
803 if ( attribs[j+1] != EGL_DONT_CARE && (
804 attribs[j] == EGL_RED_SIZE ||
805 attribs[j] == EGL_GREEN_SIZE ||
806 attribs[j] == EGL_BLUE_SIZE ||
807 attribs[j] == EGL_ALPHA_SIZE ||
808 attribs[j] == EGL_DEPTH_SIZE ||
809 attribs[j] == EGL_STENCIL_SIZE)) {
810 _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display, configs[i], attribs[j], &value);
811 bitdiff += value - attribs[j + 1]; /* value is always >= attrib */
812 }
813 }
814
815 if (bitdiff < best_bitdiff || best_bitdiff == -1) {
816 _this->egl_data->egl_config = configs[i];
817
818 best_bitdiff = bitdiff;
819 }
820
821 if (bitdiff == 0) {
822 break; /* we found an exact match! */
823 }
824 }
825
826 #ifdef DUMP_EGL_CONFIG
827 dumpconfig(_this, _this->egl_data->egl_config);
828 #endif
829
830 return 0;
831 }
832
833 SDL_GLContext
SDL_EGL_CreateContext(_THIS,EGLSurface egl_surface)834 SDL_EGL_CreateContext(_THIS, EGLSurface egl_surface)
835 {
836 /* max 14 values plus terminator. */
837 EGLint attribs[15];
838 int attr = 0;
839
840 EGLContext egl_context, share_context = EGL_NO_CONTEXT;
841 EGLint profile_mask = _this->gl_config.profile_mask;
842 EGLint major_version = _this->gl_config.major_version;
843 EGLint minor_version = _this->gl_config.minor_version;
844 SDL_bool profile_es = (profile_mask == SDL_GL_CONTEXT_PROFILE_ES);
845
846 if (!_this->egl_data) {
847 /* The EGL library wasn't loaded, SDL_GetError() should have info */
848 return NULL;
849 }
850
851 if (_this->gl_config.share_with_current_context) {
852 share_context = (EGLContext)SDL_GL_GetCurrentContext();
853 }
854
855 #if SDL_VIDEO_DRIVER_ANDROID
856 if ((_this->gl_config.flags & SDL_GL_CONTEXT_DEBUG_FLAG) != 0) {
857 /* If SDL_GL_CONTEXT_DEBUG_FLAG is set but EGL_KHR_debug unsupported, unset.
858 * This is required because some Android devices like to complain about it
859 * by "silently" failing, logging a hint which could be easily overlooked:
860 * E/libEGL (26984): validate_display:255 error 3008 (EGL_BAD_DISPLAY)
861 * The following explicitly checks for EGL_KHR_debug before EGL 1.5
862 */
863 int egl_version_major = _this->egl_data->egl_version_major;
864 int egl_version_minor = _this->egl_data->egl_version_minor;
865 if (((egl_version_major < 1) || (egl_version_major == 1 && egl_version_minor < 5)) &&
866 !SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_debug")) {
867 /* SDL profile bits match EGL profile bits. */
868 _this->gl_config.flags &= ~SDL_GL_CONTEXT_DEBUG_FLAG;
869 }
870 }
871 #endif
872
873 /* Set the context version and other attributes. */
874 if ((major_version < 3 || (minor_version == 0 && profile_es)) &&
875 _this->gl_config.flags == 0 &&
876 (profile_mask == 0 || profile_es)) {
877 /* Create a context without using EGL_KHR_create_context attribs.
878 * When creating a GLES context without EGL_KHR_create_context we can
879 * only specify the major version. When creating a desktop GL context
880 * we can't specify any version, so we only try in that case when the
881 * version is less than 3.0 (matches SDL's GLX/WGL behavior.)
882 */
883 if (profile_es) {
884 attribs[attr++] = EGL_CONTEXT_CLIENT_VERSION;
885 attribs[attr++] = SDL_max(major_version, 1);
886 }
887 } else {
888 #ifdef EGL_KHR_create_context
889 /* The Major/minor version, context profiles, and context flags can
890 * only be specified when this extension is available.
891 */
892 if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context")) {
893 attribs[attr++] = EGL_CONTEXT_MAJOR_VERSION_KHR;
894 attribs[attr++] = major_version;
895 attribs[attr++] = EGL_CONTEXT_MINOR_VERSION_KHR;
896 attribs[attr++] = minor_version;
897
898 /* SDL profile bits match EGL profile bits. */
899 if (profile_mask != 0 && profile_mask != SDL_GL_CONTEXT_PROFILE_ES) {
900 attribs[attr++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR;
901 attribs[attr++] = profile_mask;
902 }
903
904 /* SDL flags match EGL flags. */
905 if (_this->gl_config.flags != 0) {
906 attribs[attr++] = EGL_CONTEXT_FLAGS_KHR;
907 attribs[attr++] = _this->gl_config.flags;
908 }
909 } else
910 #endif /* EGL_KHR_create_context */
911 {
912 SDL_SetError("Could not create EGL context (context attributes are not supported)");
913 return NULL;
914 }
915 }
916
917 if (_this->gl_config.no_error) {
918 #ifdef EGL_KHR_create_context_no_error
919 if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_create_context_no_error")) {
920 attribs[attr++] = EGL_CONTEXT_OPENGL_NO_ERROR_KHR;
921 attribs[attr++] = _this->gl_config.no_error;
922 } else
923 #endif
924 {
925 SDL_SetError("EGL implementation does not support no_error contexts");
926 return NULL;
927 }
928 }
929
930 attribs[attr++] = EGL_NONE;
931
932 /* Bind the API */
933 if (profile_es) {
934 _this->egl_data->eglBindAPI(EGL_OPENGL_ES_API);
935 } else {
936 _this->egl_data->eglBindAPI(EGL_OPENGL_API);
937 }
938
939 egl_context = _this->egl_data->eglCreateContext(_this->egl_data->egl_display,
940 _this->egl_data->egl_config,
941 share_context, attribs);
942
943 if (egl_context == EGL_NO_CONTEXT) {
944 SDL_EGL_SetError("Could not create EGL context", "eglCreateContext");
945 return NULL;
946 }
947
948 _this->egl_data->egl_swapinterval = 0;
949
950 if (SDL_EGL_MakeCurrent(_this, egl_surface, egl_context) < 0) {
951 /* Save the SDL error set by SDL_EGL_MakeCurrent */
952 char errorText[1024];
953 SDL_strlcpy(errorText, SDL_GetError(), SDL_arraysize(errorText));
954
955 /* Delete the context, which may alter the value returned by SDL_GetError() */
956 SDL_EGL_DeleteContext(_this, egl_context);
957
958 /* Restore the SDL error */
959 SDL_SetError("%s", errorText);
960
961 return NULL;
962 }
963
964 /* Check whether making contexts current without a surface is supported.
965 * First condition: EGL must support it. That's the case for EGL 1.5
966 * or later, or if the EGL_KHR_surfaceless_context extension is present. */
967 if ((_this->egl_data->egl_version_major > 1) ||
968 ((_this->egl_data->egl_version_major == 1) && (_this->egl_data->egl_version_minor >= 5)) ||
969 SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_surfaceless_context"))
970 {
971 /* Secondary condition: The client API must support it. */
972 if (profile_es) {
973 /* On OpenGL ES, the GL_OES_surfaceless_context extension must be
974 * present. */
975 if (SDL_GL_ExtensionSupported("GL_OES_surfaceless_context")) {
976 _this->gl_allow_no_surface = SDL_TRUE;
977 }
978 #if SDL_VIDEO_OPENGL
979 } else {
980 /* Desktop OpenGL supports it by default from version 3.0 on. */
981 void (APIENTRY * glGetIntegervFunc) (GLenum pname, GLint * params);
982 glGetIntegervFunc = SDL_GL_GetProcAddress("glGetIntegerv");
983 if (glGetIntegervFunc) {
984 GLint v = 0;
985 glGetIntegervFunc(GL_MAJOR_VERSION, &v);
986 if (v >= 3) {
987 _this->gl_allow_no_surface = SDL_TRUE;
988 }
989 }
990 #endif
991 }
992 }
993
994 return (SDL_GLContext) egl_context;
995 }
996
997 int
SDL_EGL_MakeCurrent(_THIS,EGLSurface egl_surface,SDL_GLContext context)998 SDL_EGL_MakeCurrent(_THIS, EGLSurface egl_surface, SDL_GLContext context)
999 {
1000 EGLContext egl_context = (EGLContext) context;
1001
1002 if (!_this->egl_data) {
1003 return SDL_SetError("OpenGL not initialized");
1004 }
1005
1006 /* The android emulator crashes badly if you try to eglMakeCurrent
1007 * with a valid context and invalid surface, so we have to check for both here.
1008 */
1009 if (!egl_context || (!egl_surface && !_this->gl_allow_no_surface)) {
1010 _this->egl_data->eglMakeCurrent(_this->egl_data->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
1011 } else {
1012 if (!_this->egl_data->eglMakeCurrent(_this->egl_data->egl_display,
1013 egl_surface, egl_surface, egl_context)) {
1014 return SDL_EGL_SetError("Unable to make EGL context current", "eglMakeCurrent");
1015 }
1016 }
1017
1018 return 0;
1019 }
1020
1021 int
SDL_EGL_SetSwapInterval(_THIS,int interval)1022 SDL_EGL_SetSwapInterval(_THIS, int interval)
1023 {
1024 EGLBoolean status;
1025
1026 if (!_this->egl_data) {
1027 return SDL_SetError("EGL not initialized");
1028 }
1029
1030 status = _this->egl_data->eglSwapInterval(_this->egl_data->egl_display, interval);
1031 if (status == EGL_TRUE) {
1032 _this->egl_data->egl_swapinterval = interval;
1033 return 0;
1034 }
1035
1036 return SDL_EGL_SetError("Unable to set the EGL swap interval", "eglSwapInterval");
1037 }
1038
1039 int
SDL_EGL_GetSwapInterval(_THIS)1040 SDL_EGL_GetSwapInterval(_THIS)
1041 {
1042 if (!_this->egl_data) {
1043 SDL_SetError("EGL not initialized");
1044 return 0;
1045 }
1046
1047 return _this->egl_data->egl_swapinterval;
1048 }
1049
1050 int
SDL_EGL_SwapBuffers(_THIS,EGLSurface egl_surface)1051 SDL_EGL_SwapBuffers(_THIS, EGLSurface egl_surface)
1052 {
1053 if (!_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, egl_surface)) {
1054 return SDL_EGL_SetError("unable to show color buffer in an OS-native window", "eglSwapBuffers");
1055 }
1056 return 0;
1057 }
1058
1059 void
SDL_EGL_DeleteContext(_THIS,SDL_GLContext context)1060 SDL_EGL_DeleteContext(_THIS, SDL_GLContext context)
1061 {
1062 EGLContext egl_context = (EGLContext) context;
1063
1064 /* Clean up GLES and EGL */
1065 if (!_this->egl_data) {
1066 return;
1067 }
1068
1069 if (egl_context != NULL && egl_context != EGL_NO_CONTEXT) {
1070 _this->egl_data->eglDestroyContext(_this->egl_data->egl_display, egl_context);
1071 }
1072
1073 }
1074
1075 EGLSurface *
SDL_EGL_CreateSurface(_THIS,NativeWindowType nw)1076 SDL_EGL_CreateSurface(_THIS, NativeWindowType nw)
1077 {
1078 /* max 2 values plus terminator. */
1079 EGLint attribs[3];
1080 int attr = 0;
1081
1082 EGLSurface * surface;
1083
1084 if (SDL_EGL_ChooseConfig(_this) != 0) {
1085 return EGL_NO_SURFACE;
1086 }
1087
1088 #if SDL_VIDEO_DRIVER_ANDROID
1089 {
1090 /* Android docs recommend doing this!
1091 * Ref: http://developer.android.com/reference/android/app/NativeActivity.html
1092 */
1093 EGLint format;
1094 _this->egl_data->eglGetConfigAttrib(_this->egl_data->egl_display,
1095 _this->egl_data->egl_config,
1096 EGL_NATIVE_VISUAL_ID, &format);
1097
1098 ANativeWindow_setBuffersGeometry(nw, 0, 0, format);
1099
1100 /* Update SurfaceView holder format.
1101 * May triggers a sequence surfaceDestroyed(), surfaceCreated(), surfaceChanged(). */
1102 Android_JNI_SetSurfaceViewFormat(format);
1103 }
1104 #endif
1105 if (_this->gl_config.framebuffer_srgb_capable) {
1106 #ifdef EGL_KHR_gl_colorspace
1107 if (SDL_EGL_HasExtension(_this, SDL_EGL_DISPLAY_EXTENSION, "EGL_KHR_gl_colorspace")) {
1108 attribs[attr++] = EGL_GL_COLORSPACE_KHR;
1109 attribs[attr++] = EGL_GL_COLORSPACE_SRGB_KHR;
1110 } else
1111 #endif
1112 {
1113 SDL_SetError("EGL implementation does not support sRGB system framebuffers");
1114 return EGL_NO_SURFACE;
1115 }
1116 }
1117
1118 attribs[attr++] = EGL_NONE;
1119
1120 surface = _this->egl_data->eglCreateWindowSurface(
1121 _this->egl_data->egl_display,
1122 _this->egl_data->egl_config,
1123 nw, &attribs[0]);
1124 if (surface == EGL_NO_SURFACE) {
1125 SDL_EGL_SetError("unable to create an EGL window surface", "eglCreateWindowSurface");
1126 }
1127 return surface;
1128 }
1129
1130 EGLSurface
SDL_EGL_CreateOffscreenSurface(_THIS,int width,int height)1131 SDL_EGL_CreateOffscreenSurface(_THIS, int width, int height)
1132 {
1133 EGLint attributes[] = {
1134 EGL_WIDTH, width,
1135 EGL_HEIGHT, height,
1136 EGL_NONE
1137 };
1138
1139 if (SDL_EGL_ChooseConfig(_this) != 0) {
1140 return EGL_NO_SURFACE;
1141 }
1142
1143 return _this->egl_data->eglCreatePbufferSurface(
1144 _this->egl_data->egl_display,
1145 _this->egl_data->egl_config,
1146 attributes);
1147 }
1148
1149 void
SDL_EGL_DestroySurface(_THIS,EGLSurface egl_surface)1150 SDL_EGL_DestroySurface(_THIS, EGLSurface egl_surface)
1151 {
1152 if (!_this->egl_data) {
1153 return;
1154 }
1155
1156 if (egl_surface != EGL_NO_SURFACE) {
1157 _this->egl_data->eglDestroySurface(_this->egl_data->egl_display, egl_surface);
1158 }
1159 }
1160
1161 #endif /* SDL_VIDEO_OPENGL_EGL */
1162
1163 /* vi: set ts=4 sw=4 expandtab: */
1164
1165