1 /**************************************************************************
2 *
3 * Copyright (C) 2014 Red Hat Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 **************************************************************************/
24 /* create our own EGL offscreen rendering context via gbm and rendernodes */
25
26
27 /* if we are using EGL and rendernodes then we talk via file descriptors to the remote
28 node */
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32
33 #define EGL_EGLEXT_PROTOTYPES
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <stdbool.h>
37 #include <epoxy/egl.h>
38 #include <xf86drm.h>
39
40 #include "util/u_memory.h"
41
42 #include "virglrenderer.h"
43 #include "virgl_egl.h"
44 #include "virgl_hw.h"
45 #include "virgl_gbm.h"
46 #include "vrend_util.h"
47
48 #define EGL_KHR_SURFACELESS_CONTEXT BIT(0)
49 #define EGL_KHR_CREATE_CONTEXT BIT(1)
50 #define EGL_MESA_DRM_IMAGE BIT(2)
51 #define EGL_MESA_IMAGE_DMA_BUF_EXPORT BIT(3)
52 #define EGL_MESA_DMA_BUF_IMAGE_IMPORT BIT(4)
53 #define EGL_KHR_GL_COLORSPACE BIT(5)
54 #define EGL_EXT_IMAGE_DMA_BUF_IMPORT BIT(6)
55 #define EGL_EXT_IMAGE_DMA_BUF_IMPORT_MODIFIERS BIT(7)
56 #define EGL_KHR_FENCE_SYNC BIT(8)
57
58 static const struct {
59 uint32_t bit;
60 const char *string;
61 } extensions_list[] = {
62 { EGL_KHR_SURFACELESS_CONTEXT, "EGL_KHR_surfaceless_context" },
63 { EGL_KHR_CREATE_CONTEXT, "EGL_KHR_create_context" },
64 { EGL_MESA_DRM_IMAGE, "EGL_MESA_drm_image" },
65 { EGL_MESA_IMAGE_DMA_BUF_EXPORT, "EGL_MESA_image_dma_buf_export" },
66 { EGL_KHR_GL_COLORSPACE, "EGL_KHR_gl_colorspace" },
67 { EGL_EXT_IMAGE_DMA_BUF_IMPORT, "EGL_EXT_image_dma_buf_import" },
68 { EGL_EXT_IMAGE_DMA_BUF_IMPORT_MODIFIERS, "EGL_EXT_image_dma_buf_import_modifiers" },
69 { EGL_KHR_FENCE_SYNC, "EGL_KHR_fence_sync"}
70 };
71
72 struct virgl_egl {
73 struct virgl_gbm *gbm;
74 EGLDisplay egl_display;
75 EGLConfig egl_conf;
76 EGLContext egl_ctx;
77 uint32_t extension_bits;
78 bool need_fence_and_wait_external;
79 };
80
virgl_egl_has_extension_in_string(const char * haystack,const char * needle)81 static bool virgl_egl_has_extension_in_string(const char *haystack, const char *needle)
82 {
83 const unsigned needle_len = strlen(needle);
84
85 if (needle_len == 0)
86 return false;
87
88 while (true) {
89 const char *const s = strstr(haystack, needle);
90
91 if (s == NULL)
92 return false;
93
94 if (s[needle_len] == ' ' || s[needle_len] == '\0') {
95 return true;
96 }
97
98 /* strstr found an extension whose name begins with
99 * needle, but whose name is not equal to needle.
100 * Restart the search at s + needle_len so that we
101 * don't just find the same extension again and go
102 * into an infinite loop.
103 */
104 haystack = s + needle_len;
105 }
106
107 return false;
108 }
109
virgl_egl_init_extensions(struct virgl_egl * egl,const char * extensions)110 static int virgl_egl_init_extensions(struct virgl_egl *egl, const char *extensions)
111 {
112 for (uint32_t i = 0; i < ARRAY_SIZE(extensions_list); i++) {
113 if (virgl_egl_has_extension_in_string(extensions, extensions_list[i].string))
114 egl->extension_bits |= extensions_list[i].bit;
115 }
116
117 if (!has_bits(egl->extension_bits, EGL_KHR_SURFACELESS_CONTEXT | EGL_KHR_CREATE_CONTEXT)) {
118 vrend_printf( "Missing EGL_KHR_surfaceless_context or EGL_KHR_create_context\n");
119 return -1;
120 }
121
122 return 0;
123 }
124
virgl_egl_init(struct virgl_gbm * gbm,bool surfaceless,bool gles)125 struct virgl_egl *virgl_egl_init(struct virgl_gbm *gbm, bool surfaceless, bool gles)
126 {
127 static EGLint conf_att[] = {
128 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
129 EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
130 EGL_RED_SIZE, 1,
131 EGL_GREEN_SIZE, 1,
132 EGL_BLUE_SIZE, 1,
133 EGL_ALPHA_SIZE, 0,
134 EGL_NONE,
135 };
136 static const EGLint ctx_att[] = {
137 EGL_CONTEXT_CLIENT_VERSION, 2,
138 EGL_NONE
139 };
140 EGLBoolean success;
141 EGLenum api;
142 EGLint major, minor, num_configs;
143 const char *extensions;
144 struct virgl_egl *egl;
145
146 egl = calloc(1, sizeof(struct virgl_egl));
147 if (!egl)
148 return NULL;
149
150 if (gles)
151 conf_att[3] = EGL_OPENGL_ES2_BIT;
152
153 if (surfaceless)
154 conf_att[1] = EGL_PBUFFER_BIT;
155 else if (!gbm)
156 goto fail;
157
158 egl->gbm = gbm;
159 const char *client_extensions = eglQueryString (NULL, EGL_EXTENSIONS);
160
161 if (client_extensions && strstr(client_extensions, "EGL_KHR_platform_base")) {
162 PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display =
163 (PFNEGLGETPLATFORMDISPLAYEXTPROC) eglGetProcAddress ("eglGetPlatformDisplay");
164
165 if (!get_platform_display)
166 goto fail;
167
168 if (surfaceless) {
169 egl->egl_display = get_platform_display (EGL_PLATFORM_SURFACELESS_MESA,
170 EGL_DEFAULT_DISPLAY, NULL);
171 } else
172 egl->egl_display = get_platform_display (EGL_PLATFORM_GBM_KHR,
173 (EGLNativeDisplayType)egl->gbm->device, NULL);
174 } else if (client_extensions && strstr(client_extensions, "EGL_EXT_platform_base")) {
175 PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display =
176 (PFNEGLGETPLATFORMDISPLAYEXTPROC) eglGetProcAddress ("eglGetPlatformDisplayEXT");
177
178 if (!get_platform_display)
179 goto fail;
180
181 if (surfaceless) {
182 egl->egl_display = get_platform_display (EGL_PLATFORM_SURFACELESS_MESA,
183 EGL_DEFAULT_DISPLAY, NULL);
184 } else
185 egl->egl_display = get_platform_display (EGL_PLATFORM_GBM_KHR,
186 (EGLNativeDisplayType)egl->gbm->device, NULL);
187 } else {
188 egl->egl_display = eglGetDisplay((EGLNativeDisplayType)egl->gbm->device);
189 }
190
191 if (!egl->egl_display) {
192 /*
193 * Don't fallback to the default display if the fd provided by (*get_drm_fd)
194 * can't be used.
195 */
196 if (egl->gbm && egl->gbm->fd < 0)
197 goto fail;
198
199 egl->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
200 if (!egl->egl_display)
201 goto fail;
202 }
203
204 success = eglInitialize(egl->egl_display, &major, &minor);
205 if (!success)
206 goto fail;
207
208 extensions = eglQueryString(egl->egl_display, EGL_EXTENSIONS);
209 #ifdef VIRGL_EGL_DEBUG
210 vrend_printf( "EGL major/minor: %d.%d\n", major, minor);
211 vrend_printf( "EGL version: %s\n",
212 eglQueryString(egl->egl_display, EGL_VERSION));
213 vrend_printf( "EGL vendor: %s\n",
214 eglQueryString(egl->egl_display, EGL_VENDOR));
215 vrend_printf( "EGL extensions: %s\n", extensions);
216 #endif
217
218 if (virgl_egl_init_extensions(egl, extensions))
219 goto fail;
220
221 // ARM Mali platforms need explicit synchronization prior to mapping.
222 if (!strcmp(eglQueryString(egl->egl_display, EGL_VENDOR), "ARM"))
223 egl->need_fence_and_wait_external = true;
224
225 if (gles)
226 api = EGL_OPENGL_ES_API;
227 else
228 api = EGL_OPENGL_API;
229 success = eglBindAPI(api);
230 if (!success)
231 goto fail;
232
233 success = eglChooseConfig(egl->egl_display, conf_att, &egl->egl_conf,
234 1, &num_configs);
235 if (!success || num_configs != 1)
236 goto fail;
237
238 egl->egl_ctx = eglCreateContext(egl->egl_display, egl->egl_conf, EGL_NO_CONTEXT,
239 ctx_att);
240 if (!egl->egl_ctx)
241 goto fail;
242
243 eglMakeCurrent(egl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
244 egl->egl_ctx);
245 return egl;
246
247 fail:
248 free(egl);
249 return NULL;
250 }
251
virgl_egl_destroy(struct virgl_egl * egl)252 void virgl_egl_destroy(struct virgl_egl *egl)
253 {
254 eglMakeCurrent(egl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
255 EGL_NO_CONTEXT);
256 eglDestroyContext(egl->egl_display, egl->egl_ctx);
257 eglTerminate(egl->egl_display);
258 free(egl);
259 }
260
virgl_egl_create_context(struct virgl_egl * egl,struct virgl_gl_ctx_param * vparams)261 virgl_renderer_gl_context virgl_egl_create_context(struct virgl_egl *egl, struct virgl_gl_ctx_param *vparams)
262 {
263 EGLContext egl_ctx;
264 EGLint ctx_att[] = {
265 EGL_CONTEXT_CLIENT_VERSION, vparams->major_ver,
266 EGL_CONTEXT_MINOR_VERSION_KHR, vparams->minor_ver,
267 EGL_NONE
268 };
269 egl_ctx = eglCreateContext(egl->egl_display,
270 egl->egl_conf,
271 vparams->shared ? eglGetCurrentContext() : EGL_NO_CONTEXT,
272 ctx_att);
273 return (virgl_renderer_gl_context)egl_ctx;
274 }
275
virgl_egl_destroy_context(struct virgl_egl * egl,virgl_renderer_gl_context virglctx)276 void virgl_egl_destroy_context(struct virgl_egl *egl, virgl_renderer_gl_context virglctx)
277 {
278 EGLContext egl_ctx = (EGLContext)virglctx;
279 eglDestroyContext(egl->egl_display, egl_ctx);
280 }
281
virgl_egl_make_context_current(struct virgl_egl * egl,virgl_renderer_gl_context virglctx)282 int virgl_egl_make_context_current(struct virgl_egl *egl, virgl_renderer_gl_context virglctx)
283 {
284 EGLContext egl_ctx = (EGLContext)virglctx;
285
286 return eglMakeCurrent(egl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
287 egl_ctx);
288 }
289
virgl_egl_get_current_context(UNUSED struct virgl_egl * egl)290 virgl_renderer_gl_context virgl_egl_get_current_context(UNUSED struct virgl_egl *egl)
291 {
292 EGLContext egl_ctx = eglGetCurrentContext();
293 return (virgl_renderer_gl_context)egl_ctx;
294 }
295
virgl_egl_get_fourcc_for_texture(struct virgl_egl * egl,uint32_t tex_id,uint32_t format,int * fourcc)296 int virgl_egl_get_fourcc_for_texture(struct virgl_egl *egl, uint32_t tex_id, uint32_t format, int *fourcc)
297 {
298 int ret = EINVAL;
299 uint32_t gbm_format = 0;
300
301 EGLImageKHR image;
302 EGLBoolean success;
303
304 if (!has_bit(egl->extension_bits, EGL_MESA_IMAGE_DMA_BUF_EXPORT)) {
305 ret = 0;
306 goto fallback;
307 }
308
309 image = eglCreateImageKHR(egl->egl_display, eglGetCurrentContext(), EGL_GL_TEXTURE_2D_KHR,
310 (EGLClientBuffer)(unsigned long)tex_id, NULL);
311
312 if (!image)
313 return EINVAL;
314
315 success = eglExportDMABUFImageQueryMESA(egl->egl_display, image, fourcc, NULL, NULL);
316 if (!success)
317 goto out_destroy;
318 ret = 0;
319 out_destroy:
320 eglDestroyImageKHR(egl->egl_display, image);
321 return ret;
322
323 fallback:
324 ret = virgl_gbm_convert_format(&format, &gbm_format);
325 *fourcc = (int)gbm_format;
326 return ret;
327 }
328
virgl_egl_get_fd_for_texture2(struct virgl_egl * egl,uint32_t tex_id,int * fd,int * stride,int * offset)329 int virgl_egl_get_fd_for_texture2(struct virgl_egl *egl, uint32_t tex_id, int *fd,
330 int *stride, int *offset)
331 {
332 int ret = EINVAL;
333 EGLImageKHR image = eglCreateImageKHR(egl->egl_display, eglGetCurrentContext(),
334 EGL_GL_TEXTURE_2D_KHR,
335 (EGLClientBuffer)(unsigned long)tex_id, NULL);
336 if (!image)
337 return EINVAL;
338 if (!has_bit(egl->extension_bits, EGL_MESA_IMAGE_DMA_BUF_EXPORT))
339 goto out_destroy;
340
341 if (!eglExportDMABUFImageMESA(egl->egl_display, image, fd,
342 stride, offset))
343 goto out_destroy;
344
345 ret = 0;
346
347 out_destroy:
348 eglDestroyImageKHR(egl->egl_display, image);
349 return ret;
350 }
351
virgl_egl_get_fd_for_texture(struct virgl_egl * egl,uint32_t tex_id,int * fd)352 int virgl_egl_get_fd_for_texture(struct virgl_egl *egl, uint32_t tex_id, int *fd)
353 {
354 EGLImageKHR image;
355 EGLint stride;
356 EGLint offset;
357 EGLBoolean success;
358 int ret;
359 image = eglCreateImageKHR(egl->egl_display, eglGetCurrentContext(), EGL_GL_TEXTURE_2D_KHR,
360 (EGLClientBuffer)(unsigned long)tex_id, NULL);
361
362 if (!image)
363 return EINVAL;
364
365 ret = EINVAL;
366 if (has_bit(egl->extension_bits, EGL_MESA_IMAGE_DMA_BUF_EXPORT)) {
367 success = eglExportDMABUFImageMESA(egl->egl_display, image, fd, &stride,
368 &offset);
369 if (!success)
370 goto out_destroy;
371 } else if (has_bit(egl->extension_bits, EGL_MESA_DRM_IMAGE)) {
372 EGLint handle;
373 success = eglExportDRMImageMESA(egl->egl_display, image, NULL, &handle,
374 &stride);
375
376 if (!success)
377 goto out_destroy;
378
379 if (!egl->gbm)
380 goto out_destroy;
381
382 ret = virgl_gbm_export_fd(egl->gbm->device, handle, fd);
383 if (ret < 0)
384 goto out_destroy;
385 } else {
386 goto out_destroy;
387 }
388
389 ret = 0;
390 out_destroy:
391 eglDestroyImageKHR(egl->egl_display, image);
392 return ret;
393 }
394
virgl_has_egl_khr_gl_colorspace(struct virgl_egl * egl)395 bool virgl_has_egl_khr_gl_colorspace(struct virgl_egl *egl)
396 {
397 return has_bit(egl->extension_bits, EGL_KHR_GL_COLORSPACE);
398 }
399
400 #ifdef ENABLE_GBM_ALLOCATION
virgl_egl_image_from_dmabuf(struct virgl_egl * egl,struct gbm_bo * bo)401 void *virgl_egl_image_from_dmabuf(struct virgl_egl *egl, struct gbm_bo *bo)
402 {
403 int ret;
404 EGLImageKHR image;
405 int fds[VIRGL_GBM_MAX_PLANES] = {-1, -1, -1, -1};
406 int num_planes = gbm_bo_get_plane_count(bo);
407 // When the bo has 3 planes with modifier support, it requires 37 components.
408 EGLint khr_image_attrs[37] = {
409 EGL_WIDTH,
410 gbm_bo_get_width(bo),
411 EGL_HEIGHT,
412 gbm_bo_get_height(bo),
413 EGL_LINUX_DRM_FOURCC_EXT,
414 (int)gbm_bo_get_format(bo),
415 EGL_NONE,
416 };
417
418 if (num_planes < 0 || num_planes > VIRGL_GBM_MAX_PLANES)
419 return (void *)EGL_NO_IMAGE_KHR;
420
421 for (int plane = 0; plane < num_planes; plane++) {
422 uint32_t handle = gbm_bo_get_handle_for_plane(bo, plane).u32;
423 ret = virgl_gbm_export_fd(egl->gbm->device, handle, &fds[plane]);
424 if (ret < 0) {
425 vrend_printf( "failed to export plane handle\n");
426 image = (void *)EGL_NO_IMAGE_KHR;
427 goto out_close;
428 }
429 }
430
431 size_t attrs_index = 6;
432 for (int plane = 0; plane < num_planes; plane++) {
433 khr_image_attrs[attrs_index++] = EGL_DMA_BUF_PLANE0_FD_EXT + plane * 3;
434 khr_image_attrs[attrs_index++] = fds[plane];
435 khr_image_attrs[attrs_index++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT + plane * 3;
436 khr_image_attrs[attrs_index++] = gbm_bo_get_offset(bo, plane);
437 khr_image_attrs[attrs_index++] = EGL_DMA_BUF_PLANE0_PITCH_EXT + plane * 3;
438 khr_image_attrs[attrs_index++] = gbm_bo_get_stride_for_plane(bo, plane);
439 if (has_bit(egl->extension_bits, EGL_EXT_IMAGE_DMA_BUF_IMPORT_MODIFIERS)) {
440 const uint64_t modifier = gbm_bo_get_modifier(bo);
441 khr_image_attrs[attrs_index++] =
442 EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT + plane * 2;
443 khr_image_attrs[attrs_index++] = modifier & 0xfffffffful;
444 khr_image_attrs[attrs_index++] =
445 EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT + plane * 2;
446 khr_image_attrs[attrs_index++] = modifier >> 32;
447 }
448 }
449
450 khr_image_attrs[attrs_index++] = EGL_NONE;
451 image = eglCreateImageKHR(egl->egl_display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL,
452 khr_image_attrs);
453
454 out_close:
455 for (int plane = 0; plane < num_planes; plane++)
456 close(fds[plane]);
457
458 return (void*)image;
459 }
460
virgl_egl_aux_plane_image_from_dmabuf(struct virgl_egl * egl,struct gbm_bo * bo,int plane)461 void *virgl_egl_aux_plane_image_from_dmabuf(struct virgl_egl *egl, struct gbm_bo *bo, int plane)
462 {
463 int ret;
464 EGLImageKHR image = EGL_NO_IMAGE_KHR;
465 int fd = -1;
466
467 int bytes_per_pixel = virgl_gbm_get_plane_bytes_per_pixel(bo, plane);
468 if (bytes_per_pixel != 1 && bytes_per_pixel != 2)
469 return (void *)EGL_NO_IMAGE_KHR;
470
471 uint32_t handle = gbm_bo_get_handle_for_plane(bo, plane).u32;
472 ret = drmPrimeHandleToFD(gbm_device_get_fd(egl->gbm->device), handle, DRM_CLOEXEC, &fd);
473 if (ret < 0) {
474 vrend_printf("failed to export plane handle %d\n", errno);
475 return (void *)EGL_NO_IMAGE_KHR;
476 }
477
478 EGLint khr_image_attrs[17] = {
479 EGL_WIDTH,
480 virgl_gbm_get_plane_width(bo, plane),
481 EGL_HEIGHT,
482 virgl_gbm_get_plane_height(bo, plane),
483 EGL_LINUX_DRM_FOURCC_EXT,
484 (int) (bytes_per_pixel == 1 ? GBM_FORMAT_R8 : GBM_FORMAT_GR88),
485 EGL_DMA_BUF_PLANE0_FD_EXT,
486 fd,
487 EGL_DMA_BUF_PLANE0_OFFSET_EXT,
488 gbm_bo_get_offset(bo, plane),
489 EGL_DMA_BUF_PLANE0_PITCH_EXT,
490 gbm_bo_get_stride_for_plane(bo, plane),
491 };
492
493 if (has_bit(egl->extension_bits, EGL_EXT_IMAGE_DMA_BUF_IMPORT_MODIFIERS)) {
494 const uint64_t modifier = gbm_bo_get_modifier(bo);
495 khr_image_attrs[12] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
496 khr_image_attrs[13] = modifier & 0xfffffffful;
497 khr_image_attrs[14] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
498 khr_image_attrs[15] = modifier >> 32;
499 khr_image_attrs[16] = EGL_NONE;
500 } else {
501 khr_image_attrs[12] = EGL_NONE;
502 }
503
504 image = eglCreateImageKHR(egl->egl_display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, khr_image_attrs);
505
506 close(fd);
507 return (void*)image;
508 }
509
virgl_egl_image_destroy(struct virgl_egl * egl,void * image)510 void virgl_egl_image_destroy(struct virgl_egl *egl, void *image)
511 {
512 eglDestroyImageKHR(egl->egl_display, image);
513 }
514 #endif
515
virgl_egl_need_fence_and_wait_external(struct virgl_egl * egl)516 bool virgl_egl_need_fence_and_wait_external(struct virgl_egl *egl)
517 {
518 return (egl && egl->need_fence_and_wait_external);
519 }
520
virgl_egl_fence(struct virgl_egl * egl)521 void *virgl_egl_fence(struct virgl_egl *egl)
522 {
523 const EGLint attrib_list[] = {EGL_SYNC_CONDITION_KHR,
524 EGL_SYNC_PRIOR_COMMANDS_COMPLETE_KHR,
525 EGL_NONE};
526 EGLSyncKHR fence = EGL_NO_SYNC_KHR;
527
528 if (!egl || !has_bit(egl->extension_bits, EGL_KHR_FENCE_SYNC)) {
529 return (void *)fence;
530 }
531
532 return (void *)eglCreateSyncKHR(egl->egl_display, EGL_SYNC_FENCE_KHR, attrib_list);
533 }
534
virgl_egl_wait_fence(struct virgl_egl * egl,void * sync)535 void virgl_egl_wait_fence(struct virgl_egl *egl, void* sync)
536 {
537 EGLSyncKHR fence = (EGLSyncKHR) sync;
538 if (fence == EGL_NO_SYNC_KHR)
539 return;
540 eglWaitSyncKHR(egl->egl_display, fence, 0);
541 eglDestroySyncKHR(egl->egl_display, fence);
542 }
543