backend/headless: implement get_drm_fd
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6dfc8ce00b
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affc59454e
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@ -75,6 +75,7 @@ static void backend_destroy(struct wlr_backend *wlr_backend) {
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}
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wlr_allocator_destroy(backend->allocator);
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close(backend->drm_fd);
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free(backend);
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}
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@ -85,10 +86,17 @@ static struct wlr_renderer *backend_get_renderer(
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return backend->renderer;
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}
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static int backend_get_drm_fd(struct wlr_backend *wlr_backend) {
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struct wlr_headless_backend *backend =
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headless_backend_from_backend(wlr_backend);
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return backend->drm_fd;
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}
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static const struct wlr_backend_impl backend_impl = {
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.start = backend_start,
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.destroy = backend_destroy,
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.get_renderer = backend_get_renderer,
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.get_drm_fd = backend_get_drm_fd,
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};
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static void handle_display_destroy(struct wl_listener *listener, void *data) {
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@ -185,23 +193,30 @@ out:
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struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
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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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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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}
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backend->drm_fd = open_drm_render_node();
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if (backend->drm_fd < 0) {
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wlr_log(WLR_ERROR, "Failed to open DRM render node");
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goto error_drm_fd;
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}
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int drm_fd = fcntl(backend->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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goto error_dup;
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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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goto error_backend;
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close(drm_fd);
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goto error_dup;
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}
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struct wlr_renderer *renderer = wlr_renderer_autocreate(
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@ -220,9 +235,11 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
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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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error_dup:
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close(backend->drm_fd);
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error_drm_fd:
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free(backend);
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return NULL;
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}
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@ -230,33 +247,33 @@ 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 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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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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}
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backend->has_parent_renderer = true;
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backend->drm_fd = wlr_renderer_get_drm_fd(renderer);
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if (backend->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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goto error_drm_fd;
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}
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drm_fd = fcntl(drm_fd, F_DUPFD_CLOEXEC, 0);
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int drm_fd = fcntl(backend->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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goto error_dup;
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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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close(drm_fd);
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goto error_dup;
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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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goto error_backend;
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}
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backend->has_parent_renderer = true;
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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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@ -267,9 +284,11 @@ struct wlr_backend *wlr_headless_backend_create_with_renderer(
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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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error_dup:
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close(backend->drm_fd);
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error_drm_fd:
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free(backend);
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return NULL;
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}
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@ -8,6 +8,7 @@
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struct wlr_headless_backend {
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struct wlr_backend backend;
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int drm_fd;
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struct wlr_renderer *renderer;
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struct wlr_allocator *allocator;
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struct wlr_drm_format *format;
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