egl_context.c 26.6 KB
Newer Older
Cloudef's avatar
Cloudef committed
1
//========================================================================
Camilla Berglund's avatar
Camilla Berglund committed
2
// GLFW 3.3 EGL - www.glfw.org
Cloudef's avatar
Cloudef committed
3
4
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
Camilla Löwy's avatar
Camilla Löwy committed
5
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
Cloudef's avatar
Cloudef committed
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
//
// 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.
//
//========================================================================
27
28
// Please use C89 style variable declarations in this file because VS 2010
//========================================================================
Cloudef's avatar
Cloudef committed
29
30
31
32

#include "internal.h"

#include <stdio.h>
Camilla Berglund's avatar
Camilla Berglund committed
33
#include <string.h>
Cloudef's avatar
Cloudef committed
34
#include <stdlib.h>
35
#include <assert.h>
Cloudef's avatar
Cloudef committed
36

37

38
// Return a description of the specified EGL error
39
//
40
static const char* getEGLErrorString(EGLint error)
41
42
43
44
45
46
47
48
49
50
51
52
{
    switch (error)
    {
        case EGL_SUCCESS:
            return "Success";
        case EGL_NOT_INITIALIZED:
            return "EGL is not or could not be initialized";
        case EGL_BAD_ACCESS:
            return "EGL cannot access a requested resource";
        case EGL_BAD_ALLOC:
            return "EGL failed to allocate resources for the requested operation";
        case EGL_BAD_ATTRIBUTE:
Camilla Berglund's avatar
Camilla Berglund committed
53
            return "An unrecognized attribute or attribute value was passed in the attribute list";
54
        case EGL_BAD_CONTEXT:
Camilla Berglund's avatar
Camilla Berglund committed
55
            return "An EGLContext argument does not name a valid EGL rendering context";
56
        case EGL_BAD_CONFIG:
Camilla Berglund's avatar
Camilla Berglund committed
57
            return "An EGLConfig argument does not name a valid EGL frame buffer configuration";
58
        case EGL_BAD_CURRENT_SURFACE:
Camilla Berglund's avatar
Camilla Berglund committed
59
            return "The current surface of the calling thread is a window, pixel buffer or pixmap that is no longer valid";
60
        case EGL_BAD_DISPLAY:
Camilla Berglund's avatar
Camilla Berglund committed
61
            return "An EGLDisplay argument does not name a valid EGL display connection";
62
        case EGL_BAD_SURFACE:
Camilla Berglund's avatar
Camilla Berglund committed
63
            return "An EGLSurface argument does not name a valid surface configured for GL rendering";
64
65
66
67
68
        case EGL_BAD_MATCH:
            return "Arguments are inconsistent";
        case EGL_BAD_PARAMETER:
            return "One or more argument values are invalid";
        case EGL_BAD_NATIVE_PIXMAP:
Camilla Berglund's avatar
Camilla Berglund committed
69
            return "A NativePixmapType argument does not refer to a valid native pixmap";
70
        case EGL_BAD_NATIVE_WINDOW:
Camilla Berglund's avatar
Camilla Berglund committed
71
            return "A NativeWindowType argument does not refer to a valid native window";
72
73
        case EGL_CONTEXT_LOST:
            return "The application must destroy all contexts and reinitialise";
Camilla Berglund's avatar
Cleanup    
Camilla Berglund committed
74
75
        default:
            return "ERROR: UNKNOWN EGL ERROR";
76
77
78
    }
}

79
80
// Returns the specified attribute of the specified EGLConfig
//
81
static int getEGLConfigAttrib(EGLConfig config, int attrib)
82
83
{
    int value;
84
    eglGetConfigAttrib(_glfw.egl.display, config, attrib, &value);
85
86
87
    return value;
}

88
// Return the EGLConfig most closely matching the specified hints
89
//
90
static GLFWbool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
91
                                const _GLFWfbconfig* desired,
92
                                EGLConfig* result)
93
94
95
96
97
98
{
    EGLConfig* nativeConfigs;
    _GLFWfbconfig* usableConfigs;
    const _GLFWfbconfig* closest;
    int i, nativeCount, usableCount;

99
    eglGetConfigs(_glfw.egl.display, NULL, 0, &nativeCount);
100
101
102
    if (!nativeCount)
    {
        _glfwInputError(GLFW_API_UNAVAILABLE, "EGL: No EGLConfigs returned");
103
        return GLFW_FALSE;
104
105
    }

106
    nativeConfigs = calloc(nativeCount, sizeof(EGLConfig));
107
    eglGetConfigs(_glfw.egl.display, nativeConfigs, nativeCount, &nativeCount);
108

109
    usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
110
111
112
113
114
115
116
    usableCount = 0;

    for (i = 0;  i < nativeCount;  i++)
    {
        const EGLConfig n = nativeConfigs[i];
        _GLFWfbconfig* u = usableConfigs + usableCount;

Camilla Berglund's avatar
Camilla Berglund committed
117
        // Only consider RGB(A) EGLConfigs
118
        if (getEGLConfigAttrib(n, EGL_COLOR_BUFFER_TYPE) != EGL_RGB_BUFFER)
119
120
            continue;

Camilla Berglund's avatar
Camilla Berglund committed
121
        // Only consider window EGLConfigs
122
        if (!(getEGLConfigAttrib(n, EGL_SURFACE_TYPE) & EGL_WINDOW_BIT))
123
124
            continue;

125
#if defined(_GLFW_X11)
126
127
        {
            XVisualInfo vi = {0};
128

129
130
131
132
            // Only consider EGLConfigs with associated Visuals
            vi.visualid = getEGLConfigAttrib(n, EGL_NATIVE_VISUAL_ID);
            if (!vi.visualid)
                continue;
133

134
            if (desired->transparent)
135
            {
136
137
138
139
140
141
142
143
                int count;
                XVisualInfo* vis =
                    XGetVisualInfo(_glfw.x11.display, VisualIDMask, &vi, &count);
                if (vis)
                {
                    u->transparent = _glfwIsVisualTransparentX11(vis[0].visual);
                    XFree(vis);
                }
144
            }
145
        }
146
147
#endif // _GLFW_X11

148
        if (ctxconfig->client == GLFW_OPENGL_ES_API)
149
        {
150
            if (ctxconfig->major == 1)
151
            {
152
                if (!(getEGLConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES_BIT))
153
154
155
156
                    continue;
            }
            else
            {
157
                if (!(getEGLConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES2_BIT))
158
159
160
                    continue;
            }
        }
161
        else if (ctxconfig->client == GLFW_OPENGL_API)
162
        {
163
            if (!(getEGLConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_BIT))
164
165
166
                continue;
        }

167
168
169
        u->redBits = getEGLConfigAttrib(n, EGL_RED_SIZE);
        u->greenBits = getEGLConfigAttrib(n, EGL_GREEN_SIZE);
        u->blueBits = getEGLConfigAttrib(n, EGL_BLUE_SIZE);
170

171
172
173
        u->alphaBits = getEGLConfigAttrib(n, EGL_ALPHA_SIZE);
        u->depthBits = getEGLConfigAttrib(n, EGL_DEPTH_SIZE);
        u->stencilBits = getEGLConfigAttrib(n, EGL_STENCIL_SIZE);
174

175
        u->samples = getEGLConfigAttrib(n, EGL_SAMPLES);
176
        u->doublebuffer = GLFW_TRUE;
177

Camilla Berglund's avatar
Cleanup    
Camilla Berglund committed
178
        u->handle = (uintptr_t) n;
179
180
181
182
183
        usableCount++;
    }

    closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
    if (closest)
Camilla Berglund's avatar
Cleanup    
Camilla Berglund committed
184
        *result = (EGLConfig) closest->handle;
185
186
187
188

    free(nativeConfigs);
    free(usableConfigs);

Camilla Berglund's avatar
Cleanup    
Camilla Berglund committed
189
    return closest != NULL;
190
191
}

192
static void makeContextCurrentEGL(_GLFWwindow* window)
193
194
195
196
197
198
199
200
201
202
{
    if (window)
    {
        if (!eglMakeCurrent(_glfw.egl.display,
                            window->context.egl.surface,
                            window->context.egl.surface,
                            window->context.egl.handle))
        {
            _glfwInputError(GLFW_PLATFORM_ERROR,
                            "EGL: Failed to make context current: %s",
203
                            getEGLErrorString(eglGetError()));
204
205
206
207
208
209
210
211
212
213
214
215
            return;
        }
    }
    else
    {
        if (!eglMakeCurrent(_glfw.egl.display,
                            EGL_NO_SURFACE,
                            EGL_NO_SURFACE,
                            EGL_NO_CONTEXT))
        {
            _glfwInputError(GLFW_PLATFORM_ERROR,
                            "EGL: Failed to clear current context: %s",
216
                            getEGLErrorString(eglGetError()));
217
218
219
220
            return;
        }
    }

221
    _glfwPlatformSetTls(&_glfw.contextSlot, window);
222
223
}

224
static void swapBuffersEGL(_GLFWwindow* window)
225
{
226
    if (window != _glfwPlatformGetTls(&_glfw.contextSlot))
227
228
229
230
231
232
233
234
235
    {
        _glfwInputError(GLFW_PLATFORM_ERROR,
                        "EGL: The context must be current on the calling thread when swapping buffers");
        return;
    }

    eglSwapBuffers(_glfw.egl.display, window->context.egl.surface);
}

236
static void swapIntervalEGL(int interval)
237
238
239
240
{
    eglSwapInterval(_glfw.egl.display, interval);
}

241
static int extensionSupportedEGL(const char* extension)
242
243
244
245
246
247
248
249
250
251
252
{
    const char* extensions = eglQueryString(_glfw.egl.display, EGL_EXTENSIONS);
    if (extensions)
    {
        if (_glfwStringInExtensionString(extension, extensions))
            return GLFW_TRUE;
    }

    return GLFW_FALSE;
}

253
static GLFWglproc getProcAddressEGL(const char* procname)
254
{
255
    _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot);
256
257
258
259
260
261
262
263
264
265
266
267

    if (window->context.egl.client)
    {
        GLFWglproc proc = (GLFWglproc) _glfw_dlsym(window->context.egl.client,
                                                   procname);
        if (proc)
            return proc;
    }

    return eglGetProcAddress(procname);
}

268
static void destroyContextEGL(_GLFWwindow* window)
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
{
#if defined(_GLFW_X11)
    // NOTE: Do not unload libGL.so.1 while the X11 display is still open,
    //       as it will make XCloseDisplay segfault
    if (window->context.client != GLFW_OPENGL_API)
#endif // _GLFW_X11
    {
        if (window->context.egl.client)
        {
            _glfw_dlclose(window->context.egl.client);
            window->context.egl.client = NULL;
        }
    }

    if (window->context.egl.surface)
    {
        eglDestroySurface(_glfw.egl.display, window->context.egl.surface);
        window->context.egl.surface = EGL_NO_SURFACE;
    }

    if (window->context.egl.handle)
    {
        eglDestroyContext(_glfw.egl.display, window->context.egl.handle);
        window->context.egl.handle = EGL_NO_CONTEXT;
    }
}

296

297
298
299
//////////////////////////////////////////////////////////////////////////
//////                       GLFW internal API                      //////
//////////////////////////////////////////////////////////////////////////
Cloudef's avatar
Cloudef committed
300

301
// Initialize EGL
302
//
Camilla Berglund's avatar
Camilla Berglund committed
303
GLFWbool _glfwInitEGL(void)
Cloudef's avatar
Cloudef committed
304
{
305
306
307
    int i;
    const char* sonames[] =
    {
308
309
310
#if defined(_GLFW_EGL_LIBRARY)
        _GLFW_EGL_LIBRARY,
#elif defined(_GLFW_WIN32)
311
312
313
314
        "libEGL.dll",
        "EGL.dll",
#elif defined(_GLFW_COCOA)
        "libEGL.dylib",
Camilla Löwy's avatar
Camilla Löwy committed
315
316
#elif defined(__CYGWIN__)
        "libEGL-1.so",
317
318
319
320
321
322
#else
        "libEGL.so.1",
#endif
        NULL
    };

323
324
325
    if (_glfw.egl.handle)
        return GLFW_TRUE;

326
327
328
329
330
331
332
333
    for (i = 0;  sonames[i];  i++)
    {
        _glfw.egl.handle = _glfw_dlopen(sonames[i]);
        if (_glfw.egl.handle)
            break;
    }

    if (!_glfw.egl.handle)
334
335
    {
        _glfwInputError(GLFW_API_UNAVAILABLE, "EGL: Library not found");
336
        return GLFW_FALSE;
337
    }
338

339
340
    _glfw.egl.prefix = (strncmp(sonames[i], "lib", 3) == 0);

341
    _glfw.egl.GetConfigAttrib = (PFN_eglGetConfigAttrib)
342
        _glfw_dlsym(_glfw.egl.handle, "eglGetConfigAttrib");
343
    _glfw.egl.GetConfigs = (PFN_eglGetConfigs)
344
        _glfw_dlsym(_glfw.egl.handle, "eglGetConfigs");
345
    _glfw.egl.GetDisplay = (PFN_eglGetDisplay)
346
        _glfw_dlsym(_glfw.egl.handle, "eglGetDisplay");
347
    _glfw.egl.GetError = (PFN_eglGetError)
348
        _glfw_dlsym(_glfw.egl.handle, "eglGetError");
349
    _glfw.egl.Initialize = (PFN_eglInitialize)
350
        _glfw_dlsym(_glfw.egl.handle, "eglInitialize");
351
    _glfw.egl.Terminate = (PFN_eglTerminate)
352
        _glfw_dlsym(_glfw.egl.handle, "eglTerminate");
353
    _glfw.egl.BindAPI = (PFN_eglBindAPI)
354
        _glfw_dlsym(_glfw.egl.handle, "eglBindAPI");
355
    _glfw.egl.CreateContext = (PFN_eglCreateContext)
356
        _glfw_dlsym(_glfw.egl.handle, "eglCreateContext");
357
    _glfw.egl.DestroySurface = (PFN_eglDestroySurface)
358
        _glfw_dlsym(_glfw.egl.handle, "eglDestroySurface");
359
    _glfw.egl.DestroyContext = (PFN_eglDestroyContext)
360
        _glfw_dlsym(_glfw.egl.handle, "eglDestroyContext");
361
    _glfw.egl.CreateWindowSurface = (PFN_eglCreateWindowSurface)
362
        _glfw_dlsym(_glfw.egl.handle, "eglCreateWindowSurface");
363
    _glfw.egl.MakeCurrent = (PFN_eglMakeCurrent)
364
        _glfw_dlsym(_glfw.egl.handle, "eglMakeCurrent");
365
    _glfw.egl.SwapBuffers = (PFN_eglSwapBuffers)
366
        _glfw_dlsym(_glfw.egl.handle, "eglSwapBuffers");
367
    _glfw.egl.SwapInterval = (PFN_eglSwapInterval)
368
        _glfw_dlsym(_glfw.egl.handle, "eglSwapInterval");
369
    _glfw.egl.QueryString = (PFN_eglQueryString)
370
        _glfw_dlsym(_glfw.egl.handle, "eglQueryString");
371
    _glfw.egl.GetProcAddress = (PFN_eglGetProcAddress)
372
373
        _glfw_dlsym(_glfw.egl.handle, "eglGetProcAddress");

374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
    if (!_glfw.egl.GetConfigAttrib ||
        !_glfw.egl.GetConfigs ||
        !_glfw.egl.GetDisplay ||
        !_glfw.egl.GetError ||
        !_glfw.egl.Initialize ||
        !_glfw.egl.Terminate ||
        !_glfw.egl.BindAPI ||
        !_glfw.egl.CreateContext ||
        !_glfw.egl.DestroySurface ||
        !_glfw.egl.DestroyContext ||
        !_glfw.egl.CreateWindowSurface ||
        !_glfw.egl.MakeCurrent ||
        !_glfw.egl.SwapBuffers ||
        !_glfw.egl.SwapInterval ||
        !_glfw.egl.QueryString ||
        !_glfw.egl.GetProcAddress)
    {
        _glfwInputError(GLFW_PLATFORM_ERROR,
                        "EGL: Failed to load required entry points");
393
394

        _glfwTerminateEGL();
395
396
397
        return GLFW_FALSE;
    }

398
    _glfw.egl.display = eglGetDisplay(_GLFW_EGL_NATIVE_DISPLAY);
399
    if (_glfw.egl.display == EGL_NO_DISPLAY)
Cloudef's avatar
Cloudef committed
400
    {
401
402
        _glfwInputError(GLFW_API_UNAVAILABLE,
                        "EGL: Failed to get EGL display: %s",
403
                        getEGLErrorString(eglGetError()));
404
405

        _glfwTerminateEGL();
406
        return GLFW_FALSE;
Cloudef's avatar
Cloudef committed
407
408
    }

409
    if (!eglInitialize(_glfw.egl.display, &_glfw.egl.major, &_glfw.egl.minor))
Cloudef's avatar
Cloudef committed
410
    {
411
412
        _glfwInputError(GLFW_API_UNAVAILABLE,
                        "EGL: Failed to initialize EGL: %s",
413
                        getEGLErrorString(eglGetError()));
414
415

        _glfwTerminateEGL();
416
        return GLFW_FALSE;
Cloudef's avatar
Cloudef committed
417
418
    }

Camilla Berglund's avatar
Camilla Berglund committed
419
    _glfw.egl.KHR_create_context =
420
        extensionSupportedEGL("EGL_KHR_create_context");
421
    _glfw.egl.KHR_create_context_no_error =
422
        extensionSupportedEGL("EGL_KHR_create_context_no_error");
423
    _glfw.egl.KHR_gl_colorspace =
424
        extensionSupportedEGL("EGL_KHR_gl_colorspace");
425
426
    _glfw.egl.KHR_get_all_proc_addresses =
        extensionSupportedEGL("EGL_KHR_get_all_proc_addresses");
427
428
    _glfw.egl.KHR_context_flush_control =
        extensionSupportedEGL("EGL_KHR_context_flush_control");
Cloudef's avatar
Cloudef committed
429

430
    return GLFW_TRUE;
431
}
432

433
// Terminate EGL
434
//
435
void _glfwTerminateEGL(void)
436
{
437
    if (_glfw.egl.display)
438
    {
439
        eglTerminate(_glfw.egl.display);
440
441
442
443
444
        _glfw.egl.display = EGL_NO_DISPLAY;
    }

    if (_glfw.egl.handle)
    {
445
446
447
        _glfw_dlclose(_glfw.egl.handle);
        _glfw.egl.handle = NULL;
    }
Cloudef's avatar
Cloudef committed
448
449
}

Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
450
#define setAttrib(a, v) \
451
{ \
452
    assert(((size_t) index + 1) < sizeof(attribs) / sizeof(attribs[0])); \
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
453
454
    attribs[index++] = a; \
    attribs[index++] = v; \
455
}
Cloudef's avatar
Cloudef committed
456

457
// Create the OpenGL or OpenGL ES context for the window eglConfig
458
//
459
GLFWbool _glfwCreateContextForConfigEGL(_GLFWwindow* window,
Doug Binks's avatar
Doug Binks committed
460
461
                                        const _GLFWctxconfig* ctxconfig,
                                        EGLContext* context)
Cloudef's avatar
Cloudef committed
462
{
463
    EGLint attribs[40];
464
    int index = 0;
465
    EGLContext share = NULL;
Cloudef's avatar
Cloudef committed
466

467
468
469
470
471
472
    if (!_glfw.egl.display)
    {
        _glfwInputError(GLFW_API_UNAVAILABLE, "EGL: API not available");
        return GLFW_FALSE;
    }

473
    if (ctxconfig->share)
474
        share = ctxconfig->share->context.egl.handle;
Cloudef's avatar
Cloudef committed
475

476
    if (ctxconfig->client == GLFW_OPENGL_ES_API)
477
    {
478
        if (!eglBindAPI(EGL_OPENGL_ES_API))
479
        {
Camilla Berglund's avatar
Camilla Berglund committed
480
            _glfwInputError(GLFW_API_UNAVAILABLE,
481
                            "EGL: Failed to bind OpenGL ES: %s",
482
                            getEGLErrorString(eglGetError()));
483
            return GLFW_FALSE;
484
485
        }
    }
Cloudef's avatar
Cloudef committed
486
    else
487
    {
488
        if (!eglBindAPI(EGL_OPENGL_API))
489
        {
Camilla Berglund's avatar
Camilla Berglund committed
490
            _glfwInputError(GLFW_API_UNAVAILABLE,
491
                            "EGL: Failed to bind OpenGL: %s",
492
                            getEGLErrorString(eglGetError()));
493
            return GLFW_FALSE;
494
495
        }
    }
Cloudef's avatar
Cloudef committed
496

497
    if (_glfw.egl.KHR_create_context)
498
    {
499
        int mask = 0, flags = 0;
500

501
        if (ctxconfig->client == GLFW_OPENGL_API)
502
        {
503
504
505
            if (ctxconfig->forward)
                flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;

506
            if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
507
                mask |= EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR;
508
            else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
509
                mask |= EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR;
510
        }
511

512
513
514
        if (ctxconfig->debug)
            flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;

515
        if (ctxconfig->robustness)
516
        {
517
            if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
518
            {
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
519
520
                setAttrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR,
                          EGL_NO_RESET_NOTIFICATION_KHR);
521
            }
522
            else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
523
            {
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
524
525
                setAttrib(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR,
                          EGL_LOSE_CONTEXT_ON_RESET_KHR);
526
            }
527

528
529
530
            flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
        }

531
532
533
        if (ctxconfig->noerror)
        {
            if (_glfw.egl.KHR_create_context_no_error)
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
534
                setAttrib(EGL_CONTEXT_OPENGL_NO_ERROR_KHR, GLFW_TRUE);
535
536
        }

537
        if (ctxconfig->major != 1 || ctxconfig->minor != 0)
538
        {
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
539
540
            setAttrib(EGL_CONTEXT_MAJOR_VERSION_KHR, ctxconfig->major);
            setAttrib(EGL_CONTEXT_MINOR_VERSION_KHR, ctxconfig->minor);
541
        }
542
543

        if (mask)
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
544
            setAttrib(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR, mask);
545
546

        if (flags)
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
547
            setAttrib(EGL_CONTEXT_FLAGS_KHR, flags);
548
    }
549
550
    else
    {
551
        if (ctxconfig->client == GLFW_OPENGL_ES_API)
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
552
            setAttrib(EGL_CONTEXT_CLIENT_VERSION, ctxconfig->major);
553
    }
554

555
556
557
558
    if (_glfw.egl.KHR_context_flush_control)
    {
        if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
        {
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
559
560
            setAttrib(EGL_CONTEXT_RELEASE_BEHAVIOR_KHR,
                      EGL_CONTEXT_RELEASE_BEHAVIOR_NONE_KHR);
561
562
563
        }
        else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
        {
Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
564
565
            setAttrib(EGL_CONTEXT_RELEASE_BEHAVIOR_KHR,
                      EGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_KHR);
566
        }
567
    }
Cloudef's avatar
Cloudef committed
568

Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
569
    setAttrib(EGL_NONE, EGL_NONE);
570

571
    window->context.egl.handle = eglCreateContext(_glfw.egl.display,
572
                                                  window->context.egl.config, share, attribs);
573

574
    if (window->context.egl.handle == EGL_NO_CONTEXT)
Cloudef's avatar
Cloudef committed
575
    {
Camilla Berglund's avatar
Camilla Berglund committed
576
        _glfwInputError(GLFW_VERSION_UNAVAILABLE,
577
                        "EGL: Failed to create context: %s",
578
                        getEGLErrorString(eglGetError()));
579
        return GLFW_FALSE;
Cloudef's avatar
Cloudef committed
580
581
    }

582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
    return GLFW_TRUE;
}

// Create the OpenGL or OpenGL ES context
//
GLFWbool _glfwCreateContextEGL(_GLFWwindow* window,
                               const _GLFWctxconfig* ctxconfig,
                               const _GLFWfbconfig* fbconfig)
{
    EGLNativeWindowType native;
    EGLint attribs[40];
    int index = 0;

    if (!chooseEGLConfig(ctxconfig, fbconfig, &window->context.egl.config))
    {
        _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
                        "EGL: Failed to find a suitable EGLConfig");
        return GLFW_FALSE;
    }

    if (!_glfwCreateContextForConfigEGL(window,ctxconfig,&window->context.egl.handle))
    {
        return GLFW_FALSE;
    }

607
    // Set up attributes for surface creation
608
    if (fbconfig->sRGB)
609
    {
610
611
612
        if (_glfw.egl.KHR_gl_colorspace)
            setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
    }
613

614
    setAttrib(EGL_NONE, EGL_NONE);
615

616
617
618
619
620
621
622
623
624
625
626
627
    native = _glfwPlatformGetEGLNativeWindow(window);
    // HACK: ANGLE does not implement eglCreatePlatformWindowSurfaceEXT
    //       despite reporting EGL_EXT_platform_base
    if (_glfw.egl.platform && _glfw.egl.platform != EGL_PLATFORM_ANGLE_ANGLE)
    {
        window->context.egl.surface =
            eglCreatePlatformWindowSurfaceEXT(_glfw.egl.display, window->context.egl.config, native, attribs);
    }
    else
    {
        window->context.egl.surface =
            eglCreateWindowSurface(_glfw.egl.display, window->context.egl.config, native, attribs);
628
629
    }

630
    window->context.egl.surface =
631
632
633
        eglCreateWindowSurface(_glfw.egl.display,
                               config,
                               _GLFW_EGL_NATIVE_WINDOW,
634
                               attribs);
635
    if (window->context.egl.surface == EGL_NO_SURFACE)
636
637
638
    {
        _glfwInputError(GLFW_PLATFORM_ERROR,
                        "EGL: Failed to create window surface: %s",
639
                        getEGLErrorString(eglGetError()));
640
641
642
        return GLFW_FALSE;
    }

Cloudef's avatar
Cloudef committed
643

644
    // Load the appropriate client library
645
    if (!_glfw.egl.KHR_get_all_proc_addresses)
646
647
648
649
650
    {
        int i;
        const char** sonames;
        const char* es1sonames[] =
        {
651
652
653
#if defined(_GLFW_GLESV1_LIBRARY)
            _GLFW_GLESV1_LIBRARY,
#elif defined(_GLFW_WIN32)
654
655
656
657
658
659
660
661
662
663
664
665
            "GLESv1_CM.dll",
            "libGLES_CM.dll",
#elif defined(_GLFW_COCOA)
            "libGLESv1_CM.dylib",
#else
            "libGLESv1_CM.so.1",
            "libGLES_CM.so.1",
#endif
            NULL
        };
        const char* es2sonames[] =
        {
666
667
668
#if defined(_GLFW_GLESV2_LIBRARY)
            _GLFW_GLESV2_LIBRARY,
#elif defined(_GLFW_WIN32)
669
670
671
672
            "GLESv2.dll",
            "libGLESv2.dll",
#elif defined(_GLFW_COCOA)
            "libGLESv2.dylib",
Camilla Löwy's avatar
Camilla Löwy committed
673
674
#elif defined(__CYGWIN__)
            "libGLESv2-2.so",
675
676
677
678
679
680
681
#else
            "libGLESv2.so.2",
#endif
            NULL
        };
        const char* glsonames[] =
        {
682
683
684
#if defined(_GLFW_OPENGL_LIBRARY)
            _GLFW_OPENGL_LIBRARY,
#elif defined(_GLFW_WIN32)
685
686
687
688
689
690
691
#elif defined(_GLFW_COCOA)
#else
            "libGL.so.1",
#endif
            NULL
        };

692
        if (ctxconfig->client == GLFW_OPENGL_ES_API)
693
694
695
696
697
698
699
700
701
702
703
        {
            if (ctxconfig->major == 1)
                sonames = es1sonames;
            else
                sonames = es2sonames;
        }
        else
            sonames = glsonames;

        for (i = 0;  sonames[i];  i++)
        {
704
705
706
707
708
            // HACK: Match presence of lib prefix to increase chance of finding
            //       a matching pair in the jungle that is Win32 EGL/GLES
            if (_glfw.egl.prefix != (strncmp(sonames[i], "lib", 3) == 0))
                continue;

709
710
            window->context.egl.client = _glfw_dlopen(sonames[i]);
            if (window->context.egl.client)
711
712
713
                break;
        }

714
        if (!window->context.egl.client)
715
716
717
        {
            _glfwInputError(GLFW_API_UNAVAILABLE,
                            "EGL: Failed to load client library");
718
            return GLFW_FALSE;
719
720
721
        }
    }

722
723
724
725
726
727
    window->context.makeCurrent = makeContextCurrentEGL;
    window->context.swapBuffers = swapBuffersEGL;
    window->context.swapInterval = swapIntervalEGL;
    window->context.extensionSupported = extensionSupportedEGL;
    window->context.getProcAddress = getProcAddressEGL;
    window->context.destroy = destroyContextEGL;
728

729
    return GLFW_TRUE;
Cloudef's avatar
Cloudef committed
730
731
}

Camilla Löwy's avatar
Cleanup    
Camilla Löwy committed
732
#undef setAttrib
Cloudef's avatar
Cloudef committed
733

734
735
736
// Returns the Visual and depth of the chosen EGLConfig
//
#if defined(_GLFW_X11)
737
738
GLFWbool _glfwChooseVisualEGL(const _GLFWwndconfig* wndconfig,
                              const _GLFWctxconfig* ctxconfig,
739
740
                              const _GLFWfbconfig* fbconfig,
                              Visual** visual, int* depth)
741
742
743
744
745
746
747
{
    XVisualInfo* result;
    XVisualInfo desired;
    EGLConfig native;
    EGLint visualID = 0, count = 0;
    const long vimask = VisualScreenMask | VisualIDMask;

748
    if (!chooseEGLConfig(ctxconfig, fbconfig, &native))
749
750
751
752
753
754
    {
        _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
                        "EGL: Failed to find a suitable EGLConfig");
        return GLFW_FALSE;
    }

755
756
    eglGetConfigAttrib(_glfw.egl.display, native,
                       EGL_NATIVE_VISUAL_ID, &visualID);
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775

    desired.screen = _glfw.x11.screen;
    desired.visualid = visualID;

    result = XGetVisualInfo(_glfw.x11.display, vimask, &desired, &count);
    if (!result)
    {
        _glfwInputError(GLFW_PLATFORM_ERROR,
                        "EGL: Failed to retrieve Visual for EGLConfig");
        return GLFW_FALSE;
    }

    *visual = result->visual;
    *depth = result->depth;

    XFree(result);
    return GLFW_TRUE;
}
#endif // _GLFW_X11
Camilla Berglund's avatar
Camilla Berglund committed
776

777
778
static void _glfwMakeUserContextCurrentEGL(_GLFWusercontext* context)
{
779
780
781
782
    if (!eglMakeCurrent(_glfw.egl.display,
                        context->window->context.egl.surface,
                        context->window->context.egl.surface,
                        context->egl.handle))
783
    {
784
785
786
787
788
        _glfwInputError(GLFW_PLATFORM_ERROR,
                        "EGL: Failed to make user context current: %s",
                        getEGLErrorString(eglGetError()));
        _glfwPlatformSetTls(&_glfw.usercontextSlot, NULL);
        return;
789
    }
790
    _glfwPlatformSetTls(&_glfw.usercontextSlot, context);
791
792
793
794
795
796
797
798
799
800
801
}

static void _glfwDestroyUserContextEGL(_GLFWusercontext* context)
{
    if (context->egl.handle)
    {
        eglDestroyContext(_glfw.egl.display, context->egl.handle);
    }
    free(context);
}

802
803
_GLFWusercontext* _glfwCreateUserContextEGL(_GLFWwindow* window)
{
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
    _GLFWusercontext* context;
    _GLFWctxconfig ctxconfig;

    context = calloc(1, sizeof(_GLFWusercontext));
    context->window = window;

    ctxconfig = _glfw.hints.context;
    ctxconfig.share = window;

    if(!_glfwCreateContextForConfigEGL(window,&ctxconfig,&context->egl.handle))
    {
        _glfwInputError(GLFW_PLATFORM_ERROR,
                                "EGL: Failed to create user OpenGL context");
        free(context);
        return NULL;
    }

    context->makeCurrent = _glfwMakeUserContextCurrentEGL;
    context->destroy = _glfwDestroyUserContextEGL;

    return context;
825
826
827
}


Camilla Berglund's avatar
Camilla Berglund committed
828

829
830
831
832
833
834
//////////////////////////////////////////////////////////////////////////
//////                        GLFW native API                       //////
//////////////////////////////////////////////////////////////////////////

GLFWAPI EGLDisplay glfwGetEGLDisplay(void)
{
835
    _GLFW_REQUIRE_INIT_OR_RETURN(EGL_NO_DISPLAY);
836
837
838
839
840
841
    return _glfw.egl.display;
}

GLFWAPI EGLContext glfwGetEGLContext(GLFWwindow* handle)
{
    _GLFWwindow* window = (_GLFWwindow*) handle;
842
    _GLFW_REQUIRE_INIT_OR_RETURN(EGL_NO_CONTEXT);
843

844
    if (window->context.client == GLFW_NO_API)
845
846
847
848
849
    {
        _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
        return EGL_NO_CONTEXT;
    }

850
    return window->context.egl.handle;
851
852
853
854
855
}

GLFWAPI EGLSurface glfwGetEGLSurface(GLFWwindow* handle)
{
    _GLFWwindow* window = (_GLFWwindow*) handle;
856
    _GLFW_REQUIRE_INIT_OR_RETURN(EGL_NO_SURFACE);
857

858
    if (window->context.client == GLFW_NO_API)
859
860
861
862
863
    {
        _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
        return EGL_NO_SURFACE;
    }

864
    return window->context.egl.surface;
865
866
}