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https://gitlab.freedesktop.org/wlroots/wlroots.git
synced 2025-11-03 09:01:40 -05:00
514c4b4cce
The output feature flag has a flaw: it's not possible to check whether the backend supports timelines during compositor initialization when we need to figure out whether we want to enable the linux-drm-syncobj-v1 protocol. Introduce a backend-wide feature flag to indicate support for timelines to address this defect. Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3904
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/util/log.h>
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#include "backend/headless.h"
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struct wlr_headless_backend *headless_backend_from_backend(
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struct wlr_backend *wlr_backend) {
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assert(wlr_backend_is_headless(wlr_backend));
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struct wlr_headless_backend *backend = wl_container_of(wlr_backend, backend, backend);
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return backend;
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}
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static bool backend_start(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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wlr_log(WLR_INFO, "Starting headless backend");
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struct wlr_headless_output *output;
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wl_list_for_each(output, &backend->outputs, link) {
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wl_signal_emit_mutable(&backend->backend.events.new_output,
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&output->wlr_output);
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}
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backend->started = true;
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return true;
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}
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static void backend_destroy(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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if (!wlr_backend) {
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return;
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}
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wlr_backend_finish(wlr_backend);
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struct wlr_headless_output *output, *output_tmp;
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wl_list_for_each_safe(output, output_tmp, &backend->outputs, link) {
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wlr_output_destroy(&output->wlr_output);
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}
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wl_list_remove(&backend->event_loop_destroy.link);
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free(backend);
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}
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static uint32_t get_buffer_caps(struct wlr_backend *wlr_backend) {
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return WLR_BUFFER_CAP_DATA_PTR
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| WLR_BUFFER_CAP_DMABUF
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| WLR_BUFFER_CAP_SHM;
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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_buffer_caps = get_buffer_caps,
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};
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static void handle_event_loop_destroy(struct wl_listener *listener, void *data) {
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struct wlr_headless_backend *backend =
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wl_container_of(listener, backend, event_loop_destroy);
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backend_destroy(&backend->backend);
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}
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struct wlr_backend *wlr_headless_backend_create(struct wl_event_loop *loop) {
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wlr_log(WLR_INFO, "Creating headless backend");
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struct wlr_headless_backend *backend = calloc(1, sizeof(*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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wlr_backend_init(&backend->backend, &backend_impl);
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backend->event_loop = loop;
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wl_list_init(&backend->outputs);
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backend->event_loop_destroy.notify = handle_event_loop_destroy;
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wl_event_loop_add_destroy_listener(loop, &backend->event_loop_destroy);
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backend->backend.features.timeline = true;
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return &backend->backend;
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}
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bool wlr_backend_is_headless(struct wlr_backend *backend) {
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return backend->impl == &backend_impl;
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}
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