aboutsummaryrefslogtreecommitdiff
path: root/ui/egl-helpers.c
blob: 99b2ebbe233b7c7a43518b1a2e0df386c29a40f1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
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
144
145
146
147
148
149
150
151
152
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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
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
599
600
601
602
603
604
605
606
607
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
666
667
668
669
670
671
672
673
674
/*
 * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
#include "qemu/osdep.h"

#include "qemu/drm.h"
#include "qemu/error-report.h"
#include "ui/console.h"
#include "ui/egl-helpers.h"
#include "sysemu/sysemu.h"
#include "qapi/error.h"
#include "trace.h"

EGLDisplay *qemu_egl_display;
EGLConfig qemu_egl_config;
DisplayGLMode qemu_egl_mode;
bool qemu_egl_angle_d3d;

/* ------------------------------------------------------------------ */

const char *qemu_egl_get_error_string(void)
{
    EGLint error = eglGetError();

    switch (error) {
    case EGL_SUCCESS:
        return "EGL_SUCCESS";
    case EGL_NOT_INITIALIZED:
        return "EGL_NOT_INITIALIZED";
    case EGL_BAD_ACCESS:
        return "EGL_BAD_ACCESS";
    case EGL_BAD_ALLOC:
        return "EGL_BAD_ALLOC";
    case EGL_BAD_ATTRIBUTE:
        return "EGL_BAD_ATTRIBUTE";
    case EGL_BAD_CONTEXT:
        return "EGL_BAD_CONTEXT";
    case EGL_BAD_CONFIG:
        return "EGL_BAD_CONFIG";
    case EGL_BAD_CURRENT_SURFACE:
        return "EGL_BAD_CURRENT_SURFACE";
    case EGL_BAD_DISPLAY:
        return "EGL_BAD_DISPLAY";
    case EGL_BAD_SURFACE:
        return "EGL_BAD_SURFACE";
    case EGL_BAD_MATCH:
        return "EGL_BAD_MATCH";
    case EGL_BAD_PARAMETER:
        return "EGL_BAD_PARAMETER";
    case EGL_BAD_NATIVE_PIXMAP:
        return "EGL_BAD_NATIVE_PIXMAP";
    case EGL_BAD_NATIVE_WINDOW:
        return "EGL_BAD_NATIVE_WINDOW";
    case EGL_CONTEXT_LOST:
        return "EGL_CONTEXT_LOST";
    default:
        return "Unknown EGL error";
    }
}

static void egl_fb_delete_texture(egl_fb *fb)
{
    if (!fb->delete_texture) {
        return;
    }

    glDeleteTextures(1, &fb->texture);
    fb->delete_texture = false;
}

void egl_fb_destroy(egl_fb *fb)
{
    if (!fb->framebuffer) {
        return;
    }

    egl_fb_delete_texture(fb);
    glDeleteFramebuffers(1, &fb->framebuffer);

    fb->width = 0;
    fb->height = 0;
    fb->texture = 0;
    fb->framebuffer = 0;
}

void egl_fb_setup_default(egl_fb *fb, int width, int height)
{
    fb->width = width;
    fb->height = height;
    fb->framebuffer = 0; /* default framebuffer */
}

void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
                          GLuint texture, bool delete)
{
    egl_fb_delete_texture(fb);

    fb->width = width;
    fb->height = height;
    fb->texture = texture;
    fb->delete_texture = delete;
    if (!fb->framebuffer) {
        glGenFramebuffers(1, &fb->framebuffer);
    }

    glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
                              GL_TEXTURE_2D, fb->texture, 0);
}

void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
{
    GLuint texture;

    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
                 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);

    egl_fb_setup_for_tex(fb, width, height, texture, true);
}

void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip)
{
    GLuint x1 = 0;
    GLuint y1 = 0;
    GLuint x2, y2;
    GLuint w = src->width;
    GLuint h = src->height;

    glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
    glViewport(0, 0, dst->width, dst->height);

    if (src->dmabuf) {
        x1 = qemu_dmabuf_get_x(src->dmabuf);
        y1 = qemu_dmabuf_get_y(src->dmabuf);
        w = qemu_dmabuf_get_width(src->dmabuf);
        h = qemu_dmabuf_get_height(src->dmabuf);
    }

    w = (x1 + w) > src->width ? src->width - x1 : w;
    h = (y1 + h) > src->height ? src->height - y1 : h;

    y2 = flip ? y1 : h + y1;
    y1 = flip ? h + y1 : y1;
    x2 = x1 + w;

    glBlitFramebuffer(x1, y1, x2, y2,
                      0, 0, dst->width, dst->height,
                      GL_COLOR_BUFFER_BIT, GL_LINEAR);
}

void egl_fb_read(DisplaySurface *dst, egl_fb *src)
{
    glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
    glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
    glReadPixels(0, 0, surface_width(dst), surface_height(dst),
                 GL_BGRA, GL_UNSIGNED_BYTE, surface_data(dst));
}

void egl_fb_read_rect(DisplaySurface *dst, egl_fb *src, int x, int y, int w, int h)
{
    assert(surface_width(dst) == src->width);
    assert(surface_height(dst) == src->height);
    assert(surface_format(dst) == PIXMAN_x8r8g8b8);

    glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
    glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
    glPixelStorei(GL_PACK_ROW_LENGTH, surface_stride(dst) / 4);
    glReadPixels(x, y, w, h,
                 GL_BGRA, GL_UNSIGNED_BYTE, surface_data(dst) + x * 4);
    glPixelStorei(GL_PACK_ROW_LENGTH, 0);
}

void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip)
{
    glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
    glViewport(0, 0, dst->width, dst->height);
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, src->texture);
    qemu_gl_run_texture_blit(gls, flip);
}

void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip,
                       int x, int y, double scale_x, double scale_y)
{
    glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
    int w = scale_x * src->width;
    int h = scale_y * src->height;
    if (flip) {
        glViewport(x, y, w, h);
    } else {
        glViewport(x, dst->height - h - y, w, h);
    }
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, src->texture);
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    qemu_gl_run_texture_blit(gls, flip);
    glDisable(GL_BLEND);
}

/* ---------------------------------------------------------------------- */

EGLContext qemu_egl_rn_ctx;

#ifdef CONFIG_GBM

int qemu_egl_rn_fd;
struct gbm_device *qemu_egl_rn_gbm_dev;

int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
{
    qemu_egl_rn_fd = -1;
    int rc;

    qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode);
    if (qemu_egl_rn_fd == -1) {
        error_report("egl: no drm render node available");
        goto err;
    }

    qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
    if (!qemu_egl_rn_gbm_dev) {
        error_report("egl: gbm_create_device failed");
        goto err;
    }

    rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev,
                                mode);
    if (rc != 0) {
        /* qemu_egl_init_dpy_mesa reports error */
        goto err;
    }

    if (!epoxy_has_egl_extension(qemu_egl_display,
                                 "EGL_KHR_surfaceless_context")) {
        error_report("egl: EGL_KHR_surfaceless_context not supported");
        goto err;
    }
    if (!epoxy_has_egl_extension(qemu_egl_display,
                                 "EGL_MESA_image_dma_buf_export")) {
        error_report("egl: EGL_MESA_image_dma_buf_export not supported");
        goto err;
    }

    qemu_egl_rn_ctx = qemu_egl_init_ctx();
    if (!qemu_egl_rn_ctx) {
        error_report("egl: egl_init_ctx failed");
        goto err;
    }

    return 0;

err:
    if (qemu_egl_rn_gbm_dev) {
        gbm_device_destroy(qemu_egl_rn_gbm_dev);
    }
    if (qemu_egl_rn_fd != -1) {
        close(qemu_egl_rn_fd);
    }

    return -1;
}

int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
                           EGLuint64KHR *modifier)
{
    EGLImageKHR image;
    EGLint num_planes, fd;

    image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
                              EGL_GL_TEXTURE_2D_KHR,
                              (EGLClientBuffer)(unsigned long)tex_id,
                              NULL);
    if (!image) {
        return -1;
    }

    eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
                                  &num_planes, modifier);
    if (num_planes != 1) {
        eglDestroyImageKHR(qemu_egl_display, image);
        return -1;
    }
    eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
    eglDestroyImageKHR(qemu_egl_display, image);

    return fd;
}

void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
{
    EGLImageKHR image = EGL_NO_IMAGE_KHR;
    EGLint attrs[64];
    int i = 0;
    uint64_t modifier;
    uint32_t texture = qemu_dmabuf_get_texture(dmabuf);

    if (texture != 0) {
        return;
    }

    attrs[i++] = EGL_WIDTH;
    attrs[i++] = qemu_dmabuf_get_backing_width(dmabuf);
    attrs[i++] = EGL_HEIGHT;
    attrs[i++] = qemu_dmabuf_get_backing_height(dmabuf);
    attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
    attrs[i++] = qemu_dmabuf_get_fourcc(dmabuf);

    attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT;
    attrs[i++] = qemu_dmabuf_get_fd(dmabuf);
    attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
    attrs[i++] = qemu_dmabuf_get_stride(dmabuf);
    attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
    attrs[i++] = 0;
#ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
    modifier = qemu_dmabuf_get_modifier(dmabuf);
    if (modifier) {
        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
        attrs[i++] = (modifier >>  0) & 0xffffffff;
        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
        attrs[i++] = (modifier >> 32) & 0xffffffff;
    }
#endif
    attrs[i++] = EGL_NONE;

    image = eglCreateImageKHR(qemu_egl_display,
                              EGL_NO_CONTEXT,
                              EGL_LINUX_DMA_BUF_EXT,
                              NULL, attrs);
    if (image == EGL_NO_IMAGE_KHR) {
        error_report("eglCreateImageKHR failed");
        return;
    }

    glGenTextures(1, &texture);
    qemu_dmabuf_set_texture(dmabuf, texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
    eglDestroyImageKHR(qemu_egl_display, image);
}

void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
{
    uint32_t texture;

    texture = qemu_dmabuf_get_texture(dmabuf);
    if (texture == 0) {
        return;
    }

    glDeleteTextures(1, &texture);
    qemu_dmabuf_set_texture(dmabuf, 0);
}

void egl_dmabuf_create_sync(QemuDmaBuf *dmabuf)
{
    EGLSyncKHR sync;

    if (epoxy_has_egl_extension(qemu_egl_display,
                                "EGL_KHR_fence_sync") &&
        epoxy_has_egl_extension(qemu_egl_display,
                                "EGL_ANDROID_native_fence_sync")) {
        sync = eglCreateSyncKHR(qemu_egl_display,
                                EGL_SYNC_NATIVE_FENCE_ANDROID, NULL);
        if (sync != EGL_NO_SYNC_KHR) {
            qemu_dmabuf_set_sync(dmabuf, sync);
        }
    }
}

void egl_dmabuf_create_fence(QemuDmaBuf *dmabuf)
{
    void *sync = qemu_dmabuf_get_sync(dmabuf);
    int fence_fd;

    if (sync) {
        fence_fd = eglDupNativeFenceFDANDROID(qemu_egl_display,
                                              sync);
        qemu_dmabuf_set_fence_fd(dmabuf, fence_fd);
        eglDestroySyncKHR(qemu_egl_display, sync);
        qemu_dmabuf_set_sync(dmabuf, NULL);
    }
}

#endif /* CONFIG_GBM */

/* ---------------------------------------------------------------------- */

EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win)
{
    EGLSurface esurface;
    EGLBoolean b;

    esurface = eglCreateWindowSurface(qemu_egl_display,
                                      qemu_egl_config,
                                      win, NULL);
    if (esurface == EGL_NO_SURFACE) {
        error_report("egl: eglCreateWindowSurface failed");
        return NULL;
    }

    b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
    if (b == EGL_FALSE) {
        error_report("egl: eglMakeCurrent failed");
        return NULL;
    }

    return esurface;
}

/* ---------------------------------------------------------------------- */

#if defined(CONFIG_X11) || defined(CONFIG_GBM) || defined(WIN32)

/*
 * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
 *
 * Create an EGLDisplay from a native display type. This is a little quirky
 * for a few reasons.
 *
 * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
 * use, but have different function signatures in the third argument; this
 * happens not to matter for us, at the moment, but it means epoxy won't alias
 * them together.
 *
 * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
 * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
 * will crash.
 *
 * 3: You can't tell whether you have EGL 1.5 at this point, because
 * eglQueryString(EGL_VERSION) is a property of the display, which we don't
 * have yet. So you have to query for extensions no matter what. Fortunately
 * epoxy_has_egl_extension _does_ let you query for client extensions, so
 * we don't have to write our own extension string parsing.
 *
 * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
 * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
 * function pointer.
 * We can workaround this (circular dependency) by probing for the EGL 1.5
 * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
 * like mesa will be able to advertise these (even though it can do EGL 1.5).
 */
static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
                                       EGLenum platform)
{
    EGLDisplay dpy = EGL_NO_DISPLAY;

    /* In practise any EGL 1.5 implementation would support the EXT extension */
    if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
        if (platform != 0) {
            dpy = eglGetPlatformDisplayEXT(platform, native, NULL);
        }
    }

    if (dpy == EGL_NO_DISPLAY) {
        /* fallback */
        dpy = eglGetDisplay(native);
    }
    return dpy;
}

static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
                             EGLenum platform,
                             DisplayGLMode mode)
{
    static const EGLint conf_att_core[] = {
        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
        EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
        EGL_RED_SIZE,   5,
        EGL_GREEN_SIZE, 5,
        EGL_BLUE_SIZE,  5,
        EGL_ALPHA_SIZE, 0,
        EGL_NONE,
    };
    static const EGLint conf_att_gles[] = {
        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
        EGL_RED_SIZE,   5,
        EGL_GREEN_SIZE, 5,
        EGL_BLUE_SIZE,  5,
        EGL_ALPHA_SIZE, 0,
        EGL_NONE,
    };
    EGLint major, minor;
    EGLBoolean b;
    EGLint n;
    bool gles = (mode == DISPLAYGL_MODE_ES);

    qemu_egl_display = qemu_egl_get_display(dpy, platform);
    if (qemu_egl_display == EGL_NO_DISPLAY) {
        error_report("egl: eglGetDisplay failed: %s", qemu_egl_get_error_string());
        return -1;
    }

    b = eglInitialize(qemu_egl_display, &major, &minor);
    if (b == EGL_FALSE) {
        error_report("egl: eglInitialize failed: %s", qemu_egl_get_error_string());
        return -1;
    }

    b = eglBindAPI(gles ?  EGL_OPENGL_ES_API : EGL_OPENGL_API);
    if (b == EGL_FALSE) {
        error_report("egl: eglBindAPI failed (%s mode): %s",
                     gles ? "gles" : "core", qemu_egl_get_error_string());
        return -1;
    }

    b = eglChooseConfig(qemu_egl_display,
                        gles ? conf_att_gles : conf_att_core,
                        &qemu_egl_config, 1, &n);
    if (b == EGL_FALSE || n != 1) {
        error_report("egl: eglChooseConfig failed (%s mode): %s",
                     gles ? "gles" : "core", qemu_egl_get_error_string());
        return -1;
    }

    qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE;
    return 0;
}

#endif

#if defined(CONFIG_X11) || defined(CONFIG_GBM)
int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode)
{
#ifdef EGL_KHR_platform_x11
    return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode);
#else
    return qemu_egl_init_dpy(dpy, 0, mode);
#endif
}

int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode)
{
#ifdef EGL_MESA_platform_gbm
    return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode);
#else
    return qemu_egl_init_dpy(dpy, 0, mode);
#endif
}
#endif


#ifdef WIN32
int qemu_egl_init_dpy_win32(EGLNativeDisplayType dpy, DisplayGLMode mode)
{
    /* prefer GL ES, as that's what ANGLE supports */
    if (mode == DISPLAYGL_MODE_ON) {
        mode = DISPLAYGL_MODE_ES;
    }

    if (qemu_egl_init_dpy(dpy, 0, mode) < 0) {
        return -1;
    }

#ifdef EGL_D3D11_DEVICE_ANGLE
    if (epoxy_has_egl_extension(qemu_egl_display, "EGL_EXT_device_query")) {
        EGLDeviceEXT device;
        void *d3d11_device;

        if (!eglQueryDisplayAttribEXT(qemu_egl_display,
                                      EGL_DEVICE_EXT,
                                      (EGLAttrib *)&device)) {
            return 0;
        }

        if (!eglQueryDeviceAttribEXT(device,
                                     EGL_D3D11_DEVICE_ANGLE,
                                     (EGLAttrib *)&d3d11_device)) {
            return 0;
        }

        trace_egl_init_d3d11_device(device);
        qemu_egl_angle_d3d = device != NULL;
    }
#endif

    return 0;
}
#endif

bool qemu_egl_has_dmabuf(void)
{
    if (qemu_egl_display == EGL_NO_DISPLAY) {
        return false;
    }

    return epoxy_has_egl_extension(qemu_egl_display,
                                   "EGL_EXT_image_dma_buf_import");
}

EGLContext qemu_egl_init_ctx(void)
{
    static const EGLint ctx_att_core[] = {
        EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
        EGL_NONE
    };
    static const EGLint ctx_att_gles[] = {
        EGL_CONTEXT_CLIENT_VERSION, 2,
        EGL_NONE
    };
    bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES);
    EGLContext ectx;
    EGLBoolean b;

    ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
                            gles ? ctx_att_gles : ctx_att_core);
    if (ectx == EGL_NO_CONTEXT) {
        error_report("egl: eglCreateContext failed");
        return NULL;
    }

    b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
    if (b == EGL_FALSE) {
        error_report("egl: eglMakeCurrent failed");
        return NULL;
    }

    return ectx;
}

bool egl_init(const char *rendernode, DisplayGLMode mode, Error **errp)
{
    ERRP_GUARD();

    if (mode == DISPLAYGL_MODE_OFF) {
        error_setg(errp, "egl: turning off GL doesn't make sense");
        return false;
    }

#ifdef WIN32
    if (qemu_egl_init_dpy_win32(EGL_DEFAULT_DISPLAY, mode) < 0) {
        error_setg(errp, "egl: init failed");
        return false;
    }
    qemu_egl_rn_ctx = qemu_egl_init_ctx();
    if (!qemu_egl_rn_ctx) {
        error_setg(errp, "egl: egl_init_ctx failed");
        return false;
    }
#elif defined(CONFIG_GBM)
    if (egl_rendernode_init(rendernode, mode) < 0) {
        error_setg(errp, "egl: render node init failed");
        return false;
    }
#endif

    if (!qemu_egl_rn_ctx) {
        error_setg(errp, "egl: not available on this platform");
        return false;
    }

    display_opengl = 1;
    return true;
}