/* create our own EGL offscreen rendering context via gbm and rendernodes */ /* if we are using EGL and rendernodes then we talk via file descriptors to the remote node */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include #include #include #include #include "virglrenderer.h" #include "virgl_egl.h" #include "virgl_hw.h" struct virgl_egl { int fd; struct gbm_device *gbm_dev; EGLDisplay egl_display; EGLConfig egl_conf; EGLContext egl_ctx; bool have_mesa_drm_image; bool have_mesa_dma_buf_img_export; }; static int egl_rendernode_open(void) { DIR *dir; struct dirent *e; int r, fd; char *p; dir = opendir("/dev/dri"); if (!dir) return -1; fd = -1; while ((e = readdir(dir))) { if (e->d_type != DT_CHR) continue; if (strncmp(e->d_name, "renderD", 7)) continue; r = asprintf(&p, "/dev/dri/%s", e->d_name); if (r < 0) return -1; r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); if (r < 0){ fprintf(stderr, "failed to open render node %s\n", p); free(p); continue; } fd = r; fprintf(stderr, "using render node %s\n", p); free(p); break; } if (fd < 0) return -1; return fd; } static bool virgl_egl_has_extension_in_string(const char *haystack, const char *needle) { const unsigned needle_len = strlen(needle); if (needle_len == 0) return false; while (true) { const char *const s = strstr(haystack, needle); if (s == NULL) return false; if (s[needle_len] == ' ' || s[needle_len] == '\0') { return true; } /* strstr found an extension whose name begins with * needle, but whose name is not equal to needle. * Restart the search at s + needle_len so that we * don't just find the same extension again and go * into an infinite loop. */ haystack = s + needle_len; } return false; } struct virgl_egl *virgl_egl_init(void) { static const EGLint conf_att[] = { EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, EGL_RED_SIZE, 1, EGL_GREEN_SIZE, 1, EGL_BLUE_SIZE, 1, EGL_ALPHA_SIZE, 0, EGL_NONE, }; static const EGLint ctx_att[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; EGLBoolean b; EGLenum api; EGLint major, minor, n; const char *extension_list; struct virgl_egl *d; fprintf(stderr,"egl init\n"); d = malloc(sizeof(struct virgl_egl)); if (!d) return NULL; d->fd = egl_rendernode_open(); d->gbm_dev = gbm_create_device(d->fd); if (!d->gbm_dev) goto fail; d->egl_display = eglGetDisplay((EGLNativeDisplayType)d->gbm_dev); if (!d->egl_display) goto fail; b = eglInitialize(d->egl_display, &major, &minor); if (!b) goto fail; extension_list = eglQueryString(d->egl_display, EGL_EXTENSIONS); fprintf(stderr, "EGL major/minor: %d.%d\n", major, minor); fprintf(stderr, "EGL version: %s\n", eglQueryString(d->egl_display, EGL_VERSION)); fprintf(stderr, "EGL vendor: %s\n", eglQueryString(d->egl_display, EGL_VENDOR)); fprintf(stderr, "EGL extensions: %s\n", extension_list); /* require surfaceless context */ if (!virgl_egl_has_extension_in_string(extension_list, "EGL_KHR_surfaceless_context")) goto fail; d->have_mesa_drm_image = false; d->have_mesa_dma_buf_img_export = false; if (virgl_egl_has_extension_in_string(extension_list, "EGL_MESA_drm_image")) d->have_mesa_drm_image = true; if (virgl_egl_has_extension_in_string(extension_list, "EGL_MESA_image_dma_buf_export")) d->have_mesa_dma_buf_img_export = true; if (d->have_mesa_drm_image == false && d->have_mesa_dma_buf_img_export == false) { fprintf(stderr, "failed to find drm image extensions\n"); goto fail; } api = EGL_OPENGL_API; b = eglBindAPI(api); if (!b) goto fail; b = eglChooseConfig(d->egl_display, conf_att, &d->egl_conf, 1, &n); if (!b || n != 1) goto fail; d->egl_ctx = eglCreateContext(d->egl_display, d->egl_conf, EGL_NO_CONTEXT, ctx_att); if (!d->egl_ctx) goto fail; eglMakeCurrent(d->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, d->egl_ctx); return d; fail: fprintf(stderr,"fail\n"); free(d); return NULL; } void virgl_egl_destroy(struct virgl_egl *d) { eglMakeCurrent(d->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); eglDestroyContext(d->egl_display, d->egl_ctx); eglTerminate(d->egl_display); gbm_device_destroy(d->gbm_dev); close(d->fd); free(d); } virgl_gl_context virgl_egl_create_context(struct virgl_egl *ve) { EGLContext eglctx; static const EGLint ctx_att[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; eglctx = eglCreateContext(ve->egl_display, ve->egl_conf, ve->egl_ctx, ctx_att); return (virgl_gl_context)eglctx; } void virgl_egl_destroy_context(struct virgl_egl *ve, virgl_gl_context virglctx) { EGLContext eglctx = (EGLContext)virglctx; eglDestroyContext(ve->egl_display, eglctx); } int virgl_egl_make_context_current(struct virgl_egl *ve, virgl_gl_context virglctx) { EGLContext eglctx = (EGLContext)virglctx; return eglMakeCurrent(ve->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, eglctx); } virgl_gl_context virgl_egl_get_current_context(struct virgl_egl *ve) { EGLContext eglctx = eglGetCurrentContext(); return (virgl_gl_context)eglctx; } int virgl_egl_get_fd_for_texture(struct virgl_egl *ve, uint32_t tex_id, int *fd) { EGLImageKHR image; EGLint stride; EGLBoolean b; image = eglCreateImageKHR(ve->egl_display, ve->egl_ctx, EGL_GL_TEXTURE_2D_KHR, (EGLClientBuffer)(unsigned long)tex_id, NULL); if (!image) return -1; if (ve->have_mesa_dma_buf_img_export) { #ifdef EGL_MESA_image_dma_buf_export b = eglExportDMABUFImageMESA(ve->egl_display, image, fd, &stride); #else return -1; #endif } else { #ifdef EGL_MESA_drm_image EGLint handle; int r; b = eglExportDRMImageMESA(ve->egl_display, image, NULL, &handle, &stride); if (!b) return -1; fprintf(stderr,"image exported %d %d\n", handle, stride); r = drmPrimeHandleToFD(ve->fd, handle, DRM_CLOEXEC, fd); if (r < 0) return -1; #else return -1; #endif } return 0; } uint32_t virgl_egl_get_gbm_format(uint32_t format) { switch (format) { case VIRGL_FORMAT_B8G8R8X8_UNORM: return GBM_FORMAT_XRGB8888; case VIRGL_FORMAT_B8G8R8A8_UNORM: return GBM_FORMAT_ARGB8888; default: fprintf(stderr, "unknown format to convert to GBM %d\n", format); return 0; } }