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https://github.com/hyprwm/wlroots-hyprland.git
synced 2024-11-04 20:55:58 +01:00
backend/headless: select the rendering device ourselves
Backends will eventually stop creating their renderer. To prepare for this, stop using EGL_PLATFORM_SURFACELESS_MESA in the headless renderer. Pick a render node using libdrm. The new allocator/renderer creation logic looks very much like what will end up in common code.
This commit is contained in:
parent
da2a216934
commit
0aa2ba0c03
1 changed files with 103 additions and 34 deletions
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@ -71,11 +71,11 @@ static void backend_destroy(struct wlr_backend *wlr_backend) {
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wlr_signal_emit_safe(&wlr_backend->events.destroy, backend);
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free(backend->format);
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wlr_allocator_destroy(backend->allocator);
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if (backend->egl == &backend->priv_egl) {
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wlr_renderer_destroy(backend->renderer);
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wlr_egl_finish(&backend->priv_egl);
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}
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wlr_allocator_destroy(backend->allocator);
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free(backend);
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}
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@ -105,34 +105,17 @@ static void handle_renderer_destroy(struct wl_listener *listener, void *data) {
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}
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static bool backend_init(struct wlr_headless_backend *backend,
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struct wl_display *display, struct wlr_renderer *renderer) {
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struct wl_display *display, struct wlr_allocator *allocator,
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struct wlr_renderer *renderer) {
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wlr_backend_init(&backend->backend, &backend_impl);
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backend->display = display;
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wl_list_init(&backend->outputs);
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wl_list_init(&backend->input_devices);
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backend->allocator = allocator;
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backend->renderer = renderer;
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backend->egl = wlr_gles2_renderer_get_egl(renderer);
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int drm_fd = wlr_renderer_get_drm_fd(renderer);
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if (drm_fd < 0) {
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wlr_log(WLR_ERROR, "Failed to get DRM device FD from renderer");
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return false;
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}
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drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0);
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if (drm_fd < 0) {
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wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
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return false;
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}
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struct wlr_gbm_allocator *alloc = wlr_gbm_allocator_create(drm_fd);
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if (alloc == NULL) {
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wlr_log(WLR_ERROR, "Failed to create GBM allocator");
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return false;
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}
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backend->allocator = &alloc->base;
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const struct wlr_drm_format_set *formats =
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wlr_renderer_get_dmabuf_render_formats(backend->renderer);
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if (formats == NULL) {
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@ -155,15 +138,73 @@ static bool backend_init(struct wlr_headless_backend *backend,
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return true;
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}
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static int open_drm_render_node(void) {
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uint32_t flags = 0;
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int devices_len = drmGetDevices2(flags, NULL, 0);
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if (devices_len < 0) {
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wlr_log(WLR_ERROR, "drmGetDevices2 failed");
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return -1;
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}
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drmDevice **devices = calloc(devices_len, sizeof(drmDevice *));
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if (devices == NULL) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return -1;
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}
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devices_len = drmGetDevices2(flags, devices, devices_len);
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if (devices_len < 0) {
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free(devices);
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wlr_log(WLR_ERROR, "drmGetDevices2 failed");
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return -1;
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}
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int fd = -1;
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for (int i = 0; i < devices_len; i++) {
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drmDevice *dev = devices[i];
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if (dev->available_nodes & (1 << DRM_NODE_RENDER)) {
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const char *name = dev->nodes[DRM_NODE_RENDER];
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wlr_log(WLR_DEBUG, "Opening DRM render node '%s'", name);
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fd = open(name, O_RDWR | O_CLOEXEC);
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if (fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open '%s'", name);
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goto out;
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}
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break;
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}
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}
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if (fd < 0) {
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wlr_log(WLR_ERROR, "Failed to find any DRM render node");
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}
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out:
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for (int i = 0; i < devices_len; i++) {
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drmFreeDevice(&devices[i]);
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}
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free(devices);
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return fd;
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}
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struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
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wlr_renderer_create_func_t create_renderer_func) {
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wlr_log(WLR_INFO, "Creating headless backend");
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int drm_fd = open_drm_render_node();
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if (drm_fd < 0) {
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wlr_log(WLR_ERROR, "Failed to open DRM render node");
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return NULL;
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}
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struct wlr_gbm_allocator *gbm_alloc = wlr_gbm_allocator_create(drm_fd);
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if (gbm_alloc == NULL) {
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wlr_log(WLR_ERROR, "Failed to create GBM allocator");
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return false;
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}
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struct wlr_headless_backend *backend =
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calloc(1, sizeof(struct wlr_headless_backend));
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if (!backend) {
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wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_backend");
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return NULL;
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goto error_backend;
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}
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if (!create_renderer_func) {
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@ -171,42 +212,70 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
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}
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struct wlr_renderer *renderer = create_renderer_func(&backend->priv_egl,
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EGL_PLATFORM_SURFACELESS_MESA, EGL_DEFAULT_DISPLAY, NULL, 0);
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EGL_PLATFORM_GBM_KHR, gbm_alloc->gbm_device, NULL, 0);
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if (!renderer) {
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wlr_log(WLR_ERROR, "Failed to create renderer");
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free(backend);
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return NULL;
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goto error_renderer;
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}
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if (!backend_init(backend, display, renderer)) {
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wlr_renderer_destroy(backend->renderer);
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free(backend);
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return NULL;
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if (!backend_init(backend, display, &gbm_alloc->base, renderer)) {
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goto error_init;
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}
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return &backend->backend;
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error_init:
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wlr_renderer_destroy(renderer);
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error_renderer:
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free(backend);
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error_backend:
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wlr_allocator_destroy(&gbm_alloc->base);
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return NULL;
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}
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struct wlr_backend *wlr_headless_backend_create_with_renderer(
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struct wl_display *display, struct wlr_renderer *renderer) {
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wlr_log(WLR_INFO, "Creating headless backend");
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wlr_log(WLR_INFO, "Creating headless backend with parent renderer");
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int drm_fd = wlr_renderer_get_drm_fd(renderer);
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if (drm_fd < 0) {
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wlr_log(WLR_ERROR, "Failed to get DRM device FD from renderer");
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return false;
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}
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drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0);
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if (drm_fd < 0) {
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wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
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return false;
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}
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struct wlr_gbm_allocator *gbm_alloc = wlr_gbm_allocator_create(drm_fd);
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if (gbm_alloc == NULL) {
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wlr_log(WLR_ERROR, "Failed to create GBM allocator");
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return false;
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}
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struct wlr_headless_backend *backend =
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calloc(1, sizeof(struct wlr_headless_backend));
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if (!backend) {
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wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_backend");
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return NULL;
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goto error_backend;
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}
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if (!backend_init(backend, display, renderer)) {
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free(backend);
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return NULL;
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if (!backend_init(backend, display, &gbm_alloc->base, renderer)) {
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goto error_init;
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}
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backend->renderer_destroy.notify = handle_renderer_destroy;
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wl_signal_add(&renderer->events.destroy, &backend->renderer_destroy);
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return &backend->backend;
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error_init:
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free(backend);
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error_backend:
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wlr_allocator_destroy(&gbm_alloc->base);
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return NULL;
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}
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bool wlr_backend_is_headless(struct wlr_backend *backend) {
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