ui/egl-helpers.c

   1 /*
   2  * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17 #include "qemu/osdep.h"
  18
  19 #include "qemu/drm.h"
  20 #include "qemu/error-report.h"
  21 #include "ui/console.h"
  22 #include "ui/egl-helpers.h"
  23 #include "sysemu/sysemu.h"
  24 #include "qapi/error.h"
  25 #include "trace.h"
  26
  27 EGLDisplay *qemu_egl_display;
  28 EGLConfig qemu_egl_config;
  29 DisplayGLMode qemu_egl_mode;
  30 bool qemu_egl_angle_d3d;
  31
  32 /* ------------------------------------------------------------------ */
  33
  34 const char *qemu_egl_get_error_string(void)
  35 {
  36     EGLint error = eglGetError();
  37
  38     switch (error) {
  39     case EGL_SUCCESS:
  40         return "EGL_SUCCESS";
  41     case EGL_NOT_INITIALIZED:
  42         return "EGL_NOT_INITIALIZED";
  43     case EGL_BAD_ACCESS:
  44         return "EGL_BAD_ACCESS";
  45     case EGL_BAD_ALLOC:
  46         return "EGL_BAD_ALLOC";
  47     case EGL_BAD_ATTRIBUTE:
  48         return "EGL_BAD_ATTRIBUTE";
  49     case EGL_BAD_CONTEXT:
  50         return "EGL_BAD_CONTEXT";
  51     case EGL_BAD_CONFIG:
  52         return "EGL_BAD_CONFIG";
  53     case EGL_BAD_CURRENT_SURFACE:
  54         return "EGL_BAD_CURRENT_SURFACE";
  55     case EGL_BAD_DISPLAY:
  56         return "EGL_BAD_DISPLAY";
  57     case EGL_BAD_SURFACE:
  58         return "EGL_BAD_SURFACE";
  59     case EGL_BAD_MATCH:
  60         return "EGL_BAD_MATCH";
  61     case EGL_BAD_PARAMETER:
  62         return "EGL_BAD_PARAMETER";
  63     case EGL_BAD_NATIVE_PIXMAP:
  64         return "EGL_BAD_NATIVE_PIXMAP";
  65     case EGL_BAD_NATIVE_WINDOW:
  66         return "EGL_BAD_NATIVE_WINDOW";
  67     case EGL_CONTEXT_LOST:
  68         return "EGL_CONTEXT_LOST";
  69     default:
  70         return "Unknown EGL error";
  71     }
  72 }
  73
  74 static void egl_fb_delete_texture(egl_fb *fb)
  75 {
  76     if (!fb->delete_texture) {
  77         return;
  78     }
  79
  80     glDeleteTextures(1, &fb->texture);
  81     fb->delete_texture = false;
  82 }
  83
  84 void egl_fb_destroy(egl_fb *fb)
  85 {
  86     if (!fb->framebuffer) {
  87         return;
  88     }
  89
  90     egl_fb_delete_texture(fb);
  91     glDeleteFramebuffers(1, &fb->framebuffer);
  92
  93     fb->width = 0;
  94     fb->height = 0;
  95     fb->texture = 0;
  96     fb->framebuffer = 0;
  97 }
  98
  99 void egl_fb_setup_default(egl_fb *fb, int width, int height)
 100 {
 101     fb->width = width;
 102     fb->height = height;
 103     fb->framebuffer = 0; /* default framebuffer */
 104 }
 105
 106 void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
 107                           GLuint texture, bool delete)
 108 {
 109     egl_fb_delete_texture(fb);
 110
 111     fb->width = width;
 112     fb->height = height;
 113     fb->texture = texture;
 114     fb->delete_texture = delete;
 115     if (!fb->framebuffer) {
 116         glGenFramebuffers(1, &fb->framebuffer);
 117     }
 118
 119     glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
 120     glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
 121                               GL_TEXTURE_2D, fb->texture, 0);
 122 }
 123
 124 void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
 125 {
 126     GLuint texture;
 127
 128     glGenTextures(1, &texture);
 129     glBindTexture(GL_TEXTURE_2D, texture);
 130     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
 131                  0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
 132
 133     egl_fb_setup_for_tex(fb, width, height, texture, true);
 134 }
 135
 136 void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip)
 137 {
 138     GLuint x1 = 0;
 139     GLuint y1 = 0;
 140     GLuint x2, y2;
 141     GLuint w = src->width;
 142     GLuint h = src->height;
 143
 144     glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
 145     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
 146     glViewport(0, 0, dst->width, dst->height);
 147
 148     if (src->dmabuf) {
 149         x1 = src->dmabuf->x;
 150         y1 = src->dmabuf->y;
 151         w = src->dmabuf->width;
 152         h = src->dmabuf->height;
 153     }
 154
 155     w = (x1 + w) > src->width ? src->width - x1 : w;
 156     h = (y1 + h) > src->height ? src->height - y1 : h;
 157
 158     y2 = flip ? y1 : h + y1;
 159     y1 = flip ? h + y1 : y1;
 160     x2 = x1 + w;
 161
 162     glBlitFramebuffer(x1, y1, x2, y2,
 163                       0, 0, dst->width, dst->height,
 164                       GL_COLOR_BUFFER_BIT, GL_LINEAR);
 165 }
 166
 167 void egl_fb_read(DisplaySurface *dst, egl_fb *src)
 168 {
 169     glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
 170     glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
 171     glReadPixels(0, 0, surface_width(dst), surface_height(dst),
 172                  GL_BGRA, GL_UNSIGNED_BYTE, surface_data(dst));
 173 }
 174
 175 void egl_fb_read_rect(DisplaySurface *dst, egl_fb *src, int x, int y, int w, int h)
 176 {
 177     assert(surface_width(dst) == src->width);
 178     assert(surface_height(dst) == src->height);
 179     assert(surface_format(dst) == PIXMAN_x8r8g8b8);
 180
 181     glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
 182     glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
 183     glPixelStorei(GL_PACK_ROW_LENGTH, surface_stride(dst) / 4);
 184     glReadPixels(x, y, w, h,
 185                  GL_BGRA, GL_UNSIGNED_BYTE, surface_data(dst) + x * 4);
 186     glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 187 }
 188
 189 void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip)
 190 {
 191     glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
 192     glViewport(0, 0, dst->width, dst->height);
 193     glEnable(GL_TEXTURE_2D);
 194     glBindTexture(GL_TEXTURE_2D, src->texture);
 195     qemu_gl_run_texture_blit(gls, flip);
 196 }
 197
 198 void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip,
 199                        int x, int y, double scale_x, double scale_y)
 200 {
 201     glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
 202     int w = scale_x * src->width;
 203     int h = scale_y * src->height;
 204     if (flip) {
 205         glViewport(x, y, w, h);
 206     } else {
 207         glViewport(x, dst->height - h - y, w, h);
 208     }
 209     glEnable(GL_TEXTURE_2D);
 210     glBindTexture(GL_TEXTURE_2D, src->texture);
 211     glEnable(GL_BLEND);
 212     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 213     qemu_gl_run_texture_blit(gls, flip);
 214     glDisable(GL_BLEND);
 215 }
 216
 217 /* ---------------------------------------------------------------------- */
 218
 219 EGLContext qemu_egl_rn_ctx;
 220
 221 #ifdef CONFIG_GBM
 222
 223 int qemu_egl_rn_fd;
 224 struct gbm_device *qemu_egl_rn_gbm_dev;
 225
 226 int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
 227 {
 228     qemu_egl_rn_fd = -1;
 229     int rc;
 230
 231     qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode);
 232     if (qemu_egl_rn_fd == -1) {
 233         error_report("egl: no drm render node available");
 234         goto err;
 235     }
 236
 237     qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
 238     if (!qemu_egl_rn_gbm_dev) {
 239         error_report("egl: gbm_create_device failed");
 240         goto err;
 241     }
 242
 243     rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev,
 244                                 mode);
 245     if (rc != 0) {
 246         /* qemu_egl_init_dpy_mesa reports error */
 247         goto err;
 248     }
 249
 250     if (!epoxy_has_egl_extension(qemu_egl_display,
 251                                  "EGL_KHR_surfaceless_context")) {
 252         error_report("egl: EGL_KHR_surfaceless_context not supported");
 253         goto err;
 254     }
 255     if (!epoxy_has_egl_extension(qemu_egl_display,
 256                                  "EGL_MESA_image_dma_buf_export")) {
 257         error_report("egl: EGL_MESA_image_dma_buf_export not supported");
 258         goto err;
 259     }
 260
 261     qemu_egl_rn_ctx = qemu_egl_init_ctx();
 262     if (!qemu_egl_rn_ctx) {
 263         error_report("egl: egl_init_ctx failed");
 264         goto err;
 265     }
 266
 267     return 0;
 268
 269 err:
 270     if (qemu_egl_rn_gbm_dev) {
 271         gbm_device_destroy(qemu_egl_rn_gbm_dev);
 272     }
 273     if (qemu_egl_rn_fd != -1) {
 274         close(qemu_egl_rn_fd);
 275     }
 276
 277     return -1;
 278 }
 279
 280 int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
 281                            EGLuint64KHR *modifier)
 282 {
 283     EGLImageKHR image;
 284     EGLint num_planes, fd;
 285
 286     image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
 287                               EGL_GL_TEXTURE_2D_KHR,
 288                               (EGLClientBuffer)(unsigned long)tex_id,
 289                               NULL);
 290     if (!image) {
 291         return -1;
 292     }
 293
 294     eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
 295                                   &num_planes, modifier);
 296     if (num_planes != 1) {
 297         eglDestroyImageKHR(qemu_egl_display, image);
 298         return -1;
 299     }
 300     eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
 301     eglDestroyImageKHR(qemu_egl_display, image);
 302
 303     return fd;
 304 }
 305
 306 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
 307 {
 308     EGLImageKHR image = EGL_NO_IMAGE_KHR;
 309     EGLint attrs[64];
 310     int i = 0;
 311
 312     if (dmabuf->texture != 0) {
 313         return;
 314     }
 315
 316     attrs[i++] = EGL_WIDTH;
 317     attrs[i++] = dmabuf->backing_width;
 318     attrs[i++] = EGL_HEIGHT;
 319     attrs[i++] = dmabuf->backing_height;
 320     attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
 321     attrs[i++] = dmabuf->fourcc;
 322
 323     attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT;
 324     attrs[i++] = dmabuf->fd;
 325     attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
 326     attrs[i++] = dmabuf->stride;
 327     attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
 328     attrs[i++] = 0;
 329 #ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
 330     if (dmabuf->modifier) {
 331         attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
 332         attrs[i++] = (dmabuf->modifier >>  0) & 0xffffffff;
 333         attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
 334         attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff;
 335     }
 336 #endif
 337     attrs[i++] = EGL_NONE;
 338
 339     image = eglCreateImageKHR(qemu_egl_display,
 340                               EGL_NO_CONTEXT,
 341                               EGL_LINUX_DMA_BUF_EXT,
 342                               NULL, attrs);
 343     if (image == EGL_NO_IMAGE_KHR) {
 344         error_report("eglCreateImageKHR failed");
 345         return;
 346     }
 347
 348     glGenTextures(1, &dmabuf->texture);
 349     glBindTexture(GL_TEXTURE_2D, dmabuf->texture);
 350     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 351     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 352
 353     glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
 354     eglDestroyImageKHR(qemu_egl_display, image);
 355 }
 356
 357 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
 358 {
 359     if (dmabuf->texture == 0) {
 360         return;
 361     }
 362
 363     glDeleteTextures(1, &dmabuf->texture);
 364     dmabuf->texture = 0;
 365 }
 366
 367 void egl_dmabuf_create_sync(QemuDmaBuf *dmabuf)
 368 {
 369     EGLSyncKHR sync;
 370
 371     if (epoxy_has_egl_extension(qemu_egl_display,
 372                                 "EGL_KHR_fence_sync") &&
 373         epoxy_has_egl_extension(qemu_egl_display,
 374                                 "EGL_ANDROID_native_fence_sync")) {
 375         sync = eglCreateSyncKHR(qemu_egl_display,
 376                                 EGL_SYNC_NATIVE_FENCE_ANDROID, NULL);
 377         if (sync != EGL_NO_SYNC_KHR) {
 378             dmabuf->sync = sync;
 379         }
 380     }
 381 }
 382
 383 void egl_dmabuf_create_fence(QemuDmaBuf *dmabuf)
 384 {
 385     if (dmabuf->sync) {
 386         dmabuf->fence_fd = eglDupNativeFenceFDANDROID(qemu_egl_display,
 387                                                       dmabuf->sync);
 388         eglDestroySyncKHR(qemu_egl_display, dmabuf->sync);
 389         dmabuf->sync = NULL;
 390     }
 391 }
 392
 393 #endif /* CONFIG_GBM */
 394
 395 /* ---------------------------------------------------------------------- */
 396
 397 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win)
 398 {
 399     EGLSurface esurface;
 400     EGLBoolean b;
 401
 402     esurface = eglCreateWindowSurface(qemu_egl_display,
 403                                       qemu_egl_config,
 404                                       win, NULL);
 405     if (esurface == EGL_NO_SURFACE) {
 406         error_report("egl: eglCreateWindowSurface failed");
 407         return NULL;
 408     }
 409
 410     b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
 411     if (b == EGL_FALSE) {
 412         error_report("egl: eglMakeCurrent failed");
 413         return NULL;
 414     }
 415
 416     return esurface;
 417 }
 418
 419 /* ---------------------------------------------------------------------- */
 420
 421 #if defined(CONFIG_X11) || defined(CONFIG_GBM) || defined(WIN32)
 422
 423 /*
 424  * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
 425  *
 426  * Create an EGLDisplay from a native display type. This is a little quirky
 427  * for a few reasons.
 428  *
 429  * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
 430  * use, but have different function signatures in the third argument; this
 431  * happens not to matter for us, at the moment, but it means epoxy won't alias
 432  * them together.
 433  *
 434  * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
 435  * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
 436  * will crash.
 437  *
 438  * 3: You can't tell whether you have EGL 1.5 at this point, because
 439  * eglQueryString(EGL_VERSION) is a property of the display, which we don't
 440  * have yet. So you have to query for extensions no matter what. Fortunately
 441  * epoxy_has_egl_extension _does_ let you query for client extensions, so
 442  * we don't have to write our own extension string parsing.
 443  *
 444  * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
 445  * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
 446  * function pointer.
 447  * We can workaround this (circular dependency) by probing for the EGL 1.5
 448  * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
 449  * like mesa will be able to advertise these (even though it can do EGL 1.5).
 450  */
 451 static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
 452                                        EGLenum platform)
 453 {
 454     EGLDisplay dpy = EGL_NO_DISPLAY;
 455
 456     /* In practise any EGL 1.5 implementation would support the EXT extension */
 457     if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
 458         if (platform != 0) {
 459             dpy = eglGetPlatformDisplayEXT(platform, native, NULL);
 460         }
 461     }
 462
 463     if (dpy == EGL_NO_DISPLAY) {
 464         /* fallback */
 465         dpy = eglGetDisplay(native);
 466     }
 467     return dpy;
 468 }
 469
 470 static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
 471                              EGLenum platform,
 472                              DisplayGLMode mode)
 473 {
 474     static const EGLint conf_att_core[] = {
 475         EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 476         EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
 477         EGL_RED_SIZE,   5,
 478         EGL_GREEN_SIZE, 5,
 479         EGL_BLUE_SIZE,  5,
 480         EGL_ALPHA_SIZE, 0,
 481         EGL_NONE,
 482     };
 483     static const EGLint conf_att_gles[] = {
 484         EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 485         EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 486         EGL_RED_SIZE,   5,
 487         EGL_GREEN_SIZE, 5,
 488         EGL_BLUE_SIZE,  5,
 489         EGL_ALPHA_SIZE, 0,
 490         EGL_NONE,
 491     };
 492     EGLint major, minor;
 493     EGLBoolean b;
 494     EGLint n;
 495     bool gles = (mode == DISPLAYGL_MODE_ES);
 496
 497     qemu_egl_display = qemu_egl_get_display(dpy, platform);
 498     if (qemu_egl_display == EGL_NO_DISPLAY) {
 499         error_report("egl: eglGetDisplay failed: %s", qemu_egl_get_error_string());
 500         return -1;
 501     }
 502
 503     b = eglInitialize(qemu_egl_display, &major, &minor);
 504     if (b == EGL_FALSE) {
 505         error_report("egl: eglInitialize failed: %s", qemu_egl_get_error_string());
 506         return -1;
 507     }
 508
 509     b = eglBindAPI(gles ?  EGL_OPENGL_ES_API : EGL_OPENGL_API);
 510     if (b == EGL_FALSE) {
 511         error_report("egl: eglBindAPI failed (%s mode): %s",
 512                      gles ? "gles" : "core", qemu_egl_get_error_string());
 513         return -1;
 514     }
 515
 516     b = eglChooseConfig(qemu_egl_display,
 517                         gles ? conf_att_gles : conf_att_core,
 518                         &qemu_egl_config, 1, &n);
 519     if (b == EGL_FALSE || n != 1) {
 520         error_report("egl: eglChooseConfig failed (%s mode): %s",
 521                      gles ? "gles" : "core", qemu_egl_get_error_string());
 522         return -1;
 523     }
 524
 525     qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE;
 526     return 0;
 527 }
 528
 529 #endif
 530
 531 #if defined(CONFIG_X11) || defined(CONFIG_GBM)
 532 int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode)
 533 {
 534 #ifdef EGL_KHR_platform_x11
 535     return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode);
 536 #else
 537     return qemu_egl_init_dpy(dpy, 0, mode);
 538 #endif
 539 }
 540
 541 int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode)
 542 {
 543 #ifdef EGL_MESA_platform_gbm
 544     return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode);
 545 #else
 546     return qemu_egl_init_dpy(dpy, 0, mode);
 547 #endif
 548 }
 549 #endif
 550
 551
 552 #ifdef WIN32
 553 int qemu_egl_init_dpy_win32(EGLNativeDisplayType dpy, DisplayGLMode mode)
 554 {
 555     /* prefer GL ES, as that's what ANGLE supports */
 556     if (mode == DISPLAYGL_MODE_ON) {
 557         mode = DISPLAYGL_MODE_ES;
 558     }
 559
 560     if (qemu_egl_init_dpy(dpy, 0, mode) < 0) {
 561         return -1;
 562     }
 563
 564 #ifdef EGL_D3D11_DEVICE_ANGLE
 565     if (epoxy_has_egl_extension(qemu_egl_display, "EGL_EXT_device_query")) {
 566         EGLDeviceEXT device;
 567         void *d3d11_device;
 568
 569         if (!eglQueryDisplayAttribEXT(qemu_egl_display,
 570                                       EGL_DEVICE_EXT,
 571                                       (EGLAttrib *)&device)) {
 572             return 0;
 573         }
 574
 575         if (!eglQueryDeviceAttribEXT(device,
 576                                      EGL_D3D11_DEVICE_ANGLE,
 577                                      (EGLAttrib *)&d3d11_device)) {
 578             return 0;
 579         }
 580
 581         trace_egl_init_d3d11_device(device);
 582         qemu_egl_angle_d3d = device != NULL;
 583     }
 584 #endif
 585
 586     return 0;
 587 }
 588 #endif
 589
 590 bool qemu_egl_has_dmabuf(void)
 591 {
 592     if (qemu_egl_display == EGL_NO_DISPLAY) {
 593         return false;
 594     }
 595
 596     return epoxy_has_egl_extension(qemu_egl_display,
 597                                    "EGL_EXT_image_dma_buf_import");
 598 }
 599
 600 EGLContext qemu_egl_init_ctx(void)
 601 {
 602     static const EGLint ctx_att_core[] = {
 603         EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
 604         EGL_NONE
 605     };
 606     static const EGLint ctx_att_gles[] = {
 607         EGL_CONTEXT_CLIENT_VERSION, 2,
 608         EGL_NONE
 609     };
 610     bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES);
 611     EGLContext ectx;
 612     EGLBoolean b;
 613
 614     ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
 615                             gles ? ctx_att_gles : ctx_att_core);
 616     if (ectx == EGL_NO_CONTEXT) {
 617         error_report("egl: eglCreateContext failed");
 618         return NULL;
 619     }
 620
 621     b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
 622     if (b == EGL_FALSE) {
 623         error_report("egl: eglMakeCurrent failed");
 624         return NULL;
 625     }
 626
 627     return ectx;
 628 }
 629
 630 bool egl_init(const char *rendernode, DisplayGLMode mode, Error **errp)
 631 {
 632     ERRP_GUARD();
 633
 634     if (mode == DISPLAYGL_MODE_OFF) {
 635         error_setg(errp, "egl: turning off GL doesn't make sense");
 636         return false;
 637     }
 638
 639 #ifdef WIN32
 640     if (qemu_egl_init_dpy_win32(EGL_DEFAULT_DISPLAY, mode) < 0) {
 641         error_setg(errp, "egl: init failed");
 642         return false;
 643     }
 644     qemu_egl_rn_ctx = qemu_egl_init_ctx();
 645     if (!qemu_egl_rn_ctx) {
 646         error_setg(errp, "egl: egl_init_ctx failed");
 647         return false;
 648     }
 649 #elif defined(CONFIG_GBM)
 650     if (egl_rendernode_init(rendernode, mode) < 0) {
 651         error_setg(errp, "egl: render node init failed");
 652         return false;
 653     }
 654 #endif
 655
 656     if (!qemu_egl_rn_ctx) {
 657         error_setg(errp, "egl: not available on this platform");
 658         return false;
 659     }
 660
 661     display_opengl = 1;
 662     return true;
 663 }