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examples/explicit-sync: new example
This commit is contained in:
Simon Ser
parent
4f5909ca6a
commit
384f2249c7
2 changed files with 264 additions and 0 deletions
260
examples/explicit-sync.c
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260
examples/explicit-sync.c
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#define _POSIX_C_SOURCE 200112L
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#include <assert.h>
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#include <getopt.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <wayland-server-core.h>
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#include <wlr/backend.h>
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#include <wlr/render/allocator.h>
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#include <wlr/render/timeline.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_compositor.h>
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#include <wlr/types/wlr_linux_explicit_synchronization_v1.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/types/wlr_xdg_shell.h>
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#include <wlr/util/log.h>
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/* Simple compositor with explicit synchronization support. Input is
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* unimplemented.
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*
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* New surfaces are stacked on top of the existing ones as they appear. */
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struct server {
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struct wl_display *display;
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struct wlr_backend *backend;
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struct wlr_renderer *renderer;
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struct wlr_allocator *allocator;
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struct wlr_linux_explicit_synchronization_v1 *explicit_sync_v1;
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struct wl_list outputs;
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struct wl_list surfaces;
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struct wl_listener new_output;
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struct wl_listener new_surface;
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};
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struct surface {
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struct wlr_surface *wlr;
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struct wl_list link;
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struct wlr_render_timeline *timeline;
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struct wl_listener destroy;
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};
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struct output {
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struct wl_list link;
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struct server *server;
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struct wlr_output *wlr;
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struct wlr_render_timeline *in_timeline, *out_timeline;
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struct wl_listener frame;
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};
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static void output_handle_frame(struct wl_listener *listener, void *data) {
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struct output *output = wl_container_of(listener, output, frame);
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struct wlr_renderer *renderer = output->server->renderer;
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if (!wlr_output_attach_render(output->wlr, NULL)) {
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return;
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}
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wlr_renderer_begin(renderer, output->wlr->width, output->wlr->height);
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wlr_renderer_clear(renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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int pos = 0;
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struct surface *surface;
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wl_list_for_each(surface, &output->server->surfaces, link) {
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pos += 50;
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struct wlr_texture *texture = wlr_surface_get_texture(surface->wlr);
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if (texture == NULL) {
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continue;
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}
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uint64_t surface_point = surface->wlr->current.seq;
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if (!wlr_linux_explicit_synchronization_v1_signal_surface_timeline(
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output->server->explicit_sync_v1, surface->wlr,
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surface->timeline, surface_point)) {
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wlr_log(WLR_ERROR, "Failed to signal surface timeline");
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continue;
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}
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if (!wlr_renderer_wait_timeline(renderer,
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surface->timeline, surface_point)) {
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wlr_log(WLR_ERROR, "Failed to wait for surface timeline");
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continue;
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}
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wlr_render_texture(renderer, texture, output->wlr->transform_matrix,
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pos, pos, 1.0);
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wlr_surface_send_frame_done(surface->wlr, &now);
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}
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uint64_t output_point = output->wlr->commit_seq;
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if (!wlr_renderer_signal_timeline(renderer, output->in_timeline,
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output_point)) {
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wlr_log(WLR_ERROR, "Failed to signal renderer timeline");
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return;
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}
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wlr_renderer_end(renderer);
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wlr_output_set_wait_timeline(output->wlr,
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output->in_timeline, output_point);
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wlr_output_set_signal_timeline(output->wlr,
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output->out_timeline, output_point);
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if (!wlr_output_commit(output->wlr)) {
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wlr_log(WLR_ERROR, "Failed to commit output");
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return;
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}
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wl_list_for_each(surface, &output->server->surfaces, link) {
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if (!wlr_linux_explicit_synchronization_v1_wait_surface_timeline(
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output->server->explicit_sync_v1, surface->wlr,
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output->out_timeline, output_point)) {
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wlr_log(WLR_ERROR, "Failed to wait for surface timeline");
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}
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}
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}
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static void server_handle_new_output(struct wl_listener *listener, void *data) {
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struct server *server = wl_container_of(listener, server, new_output);
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struct wlr_output *wlr_output = data;
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if (!wlr_output_init_render(wlr_output, server->allocator, server->renderer)) {
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return;
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}
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int drm_fd = wlr_renderer_get_drm_fd(server->renderer);
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struct wlr_render_timeline *in_timeline = wlr_render_timeline_create(drm_fd);
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struct wlr_render_timeline *out_timeline = wlr_render_timeline_create(drm_fd);
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if (in_timeline == NULL || out_timeline == NULL) {
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return;
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}
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struct output *output =
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calloc(1, sizeof(struct output));
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output->wlr = wlr_output;
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output->server = server;
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output->in_timeline = in_timeline;
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output->out_timeline = out_timeline;
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output->frame.notify = output_handle_frame;
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wl_signal_add(&wlr_output->events.frame, &output->frame);
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wl_list_insert(&server->outputs, &output->link);
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if (!wl_list_empty(&wlr_output->modes)) {
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struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output);
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wlr_output_set_mode(wlr_output, mode);
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wlr_output_commit(wlr_output);
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}
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wlr_output_create_global(wlr_output);
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}
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static void surface_handle_destroy(struct wl_listener *listener, void *data) {
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struct surface *surface = wl_container_of(listener, surface, destroy);
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wlr_render_timeline_destroy(surface->timeline);
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wl_list_remove(&surface->destroy.link);
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wl_list_remove(&surface->link);
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free(surface);
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}
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static void server_handle_new_surface(struct wl_listener *listener,
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void *data) {
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struct server *server = wl_container_of(listener, server, new_surface);
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struct wlr_surface *wlr_surface = data;
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int drm_fd = wlr_renderer_get_drm_fd(server->renderer);
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struct wlr_render_timeline *timeline = wlr_render_timeline_create(drm_fd);
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if (timeline == NULL) {
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return;
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}
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struct surface *surface = calloc(1, sizeof(struct surface));
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surface->wlr = wlr_surface;
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surface->timeline = timeline;
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surface->destroy.notify = surface_handle_destroy;
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wl_signal_add(&wlr_surface->events.destroy, &surface->destroy);
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wl_list_insert(&server->surfaces, &surface->link);
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}
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int main(int argc, char *argv[]) {
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wlr_log_init(WLR_DEBUG, NULL);
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const char *startup_cmd = NULL;
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int c;
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while ((c = getopt(argc, argv, "s:")) != -1) {
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switch (c) {
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case 's':
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startup_cmd = optarg;
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break;
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default:
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printf("usage: %s [-s startup-command]\n", argv[0]);
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return EXIT_FAILURE;
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}
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}
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if (optind < argc) {
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printf("usage: %s [-s startup-command]\n", argv[0]);
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return EXIT_FAILURE;
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}
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struct server server = {0};
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server.display = wl_display_create();
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server.backend = wlr_backend_autocreate(server.display);
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server.renderer = wlr_renderer_autocreate(server.backend);
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server.allocator = wlr_allocator_autocreate(server.backend, server.renderer);
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wlr_renderer_init_wl_display(server.renderer, server.display);
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struct wlr_compositor *compositor =
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wlr_compositor_create(server.display, server.renderer);
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wlr_xdg_shell_create(server.display);
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server.explicit_sync_v1 =
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wlr_linux_explicit_synchronization_v1_create(server.display);
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wl_list_init(&server.outputs);
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wl_list_init(&server.surfaces);
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server.new_output.notify = server_handle_new_output;
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wl_signal_add(&server.backend->events.new_output, &server.new_output);
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server.new_surface.notify = server_handle_new_surface;
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wl_signal_add(&compositor->events.new_surface, &server.new_surface);
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const char *socket = wl_display_add_socket_auto(server.display);
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if (!socket) {
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wl_display_destroy(server.display);
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return EXIT_FAILURE;
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}
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if (!wlr_backend_start(server.backend)) {
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wl_display_destroy(server.display);
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return EXIT_FAILURE;
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}
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setenv("WAYLAND_DISPLAY", socket, true);
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if (startup_cmd != NULL) {
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if (fork() == 0) {
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execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
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}
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}
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wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s",
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socket);
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wl_display_run(server.display);
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wl_display_destroy_clients(server.display);
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wl_display_destroy(server.display);
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return EXIT_SUCCESS;
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}
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@ -57,6 +57,10 @@ compositors = {
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'src': 'scene-graph.c',
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'src': 'scene-graph.c',
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'proto': ['xdg-shell'],
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'proto': ['xdg-shell'],
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},
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},
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'explicit-sync': {
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'src': 'explicit-sync.c',
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'proto': ['xdg-shell'],
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},
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}
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}
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clients = {
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clients = {
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