From fda38350bf4ba9a4964276f2c7d6c6ca8686ae13 Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Wed, 20 Oct 2021 22:00:39 +0200 Subject: [PATCH] examples/explicit-sync: new example --- examples/explicit-sync.c | 254 +++++++++++++++++++++++++++++++++++++++ examples/meson.build | 4 + 2 files changed, 258 insertions(+) create mode 100644 examples/explicit-sync.c diff --git a/examples/explicit-sync.c b/examples/explicit-sync.c new file mode 100644 index 0000000000..607b762fb8 --- /dev/null +++ b/examples/explicit-sync.c @@ -0,0 +1,254 @@ +#define _POSIX_C_SOURCE 200112L +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Simple compositor with explicit synchronization support. Input is + * unimplemented. + * + * New surfaces are stacked on top of the existing ones as they appear. */ + +struct server { + struct wl_display *display; + struct wlr_backend *backend; + struct wlr_renderer *renderer; + struct wlr_linux_explicit_synchronization_v1 *explicit_sync_v1; + + struct wl_list outputs; + struct wl_list surfaces; + + struct wl_listener new_output; + struct wl_listener new_surface; +}; + +struct surface { + struct wlr_surface *wlr; + struct wl_list link; + + struct wlr_render_timeline *timeline; + + struct wl_listener destroy; +}; + +struct output { + struct wl_list link; + struct server *server; + struct wlr_output *wlr; + + struct wlr_render_timeline *in_timeline, *out_timeline; + + struct wl_listener frame; +}; + +static void output_handle_frame(struct wl_listener *listener, void *data) { + struct output *output = wl_container_of(listener, output, frame); + struct wlr_renderer *renderer = output->server->renderer; + + if (!wlr_output_attach_render(output->wlr, NULL)) { + return; + } + + wlr_renderer_begin(renderer, output->wlr->width, output->wlr->height); + wlr_renderer_clear(renderer, (float[]){0.25f, 0.25f, 0.25f, 1}); + + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + + int pos = 0; + struct surface *surface; + wl_list_for_each(surface, &output->server->surfaces, link) { + pos += 50; + + struct wlr_texture *texture = wlr_surface_get_texture(surface->wlr); + if (texture == NULL) { + continue; + } + + uint64_t surface_point = surface->wlr->current.seq; + if (!wlr_linux_explicit_synchronization_v1_signal_surface_timeline( + output->server->explicit_sync_v1, surface->wlr, + surface->timeline, surface_point)) { + wlr_log(WLR_ERROR, "Failed to signal surface timeline"); + continue; + } + if (!wlr_renderer_wait_timeline(renderer, + surface->timeline, surface_point)) { + wlr_log(WLR_ERROR, "Failed to wait for surface timeline"); + continue; + } + + wlr_render_texture(renderer, texture, output->wlr->transform_matrix, + pos, pos, 1.0); + + wlr_surface_send_frame_done(surface->wlr, &now); + } + + uint64_t output_point = output->wlr->commit_seq; + if (!wlr_renderer_signal_timeline(renderer, output->in_timeline, + output_point)) { + wlr_log(WLR_ERROR, "Failed to signal renderer timeline"); + return; + } + + wlr_renderer_end(renderer); + + wlr_output_set_wait_timeline(output->wlr, + output->in_timeline, output_point); + wlr_output_set_signal_timeline(output->wlr, + output->out_timeline, output_point); + + if (!wlr_output_commit(output->wlr)) { + wlr_log(WLR_ERROR, "Failed to commit output"); + return; + } + + wl_list_for_each(surface, &output->server->surfaces, link) { + if (!wlr_linux_explicit_synchronization_v1_wait_surface_timeline( + output->server->explicit_sync_v1, surface->wlr, + output->out_timeline, output_point)) { + wlr_log(WLR_ERROR, "Failed to wait for surface timeline"); + } + } +} + +static void server_handle_new_output(struct wl_listener *listener, void *data) { + struct server *server = wl_container_of(listener, server, new_output); + struct wlr_output *wlr_output = data; + + int drm_fd = wlr_renderer_get_drm_fd(server->renderer); + struct wlr_render_timeline *in_timeline = wlr_render_timeline_create(drm_fd); + struct wlr_render_timeline *out_timeline = wlr_render_timeline_create(drm_fd); + if (in_timeline == NULL || out_timeline == NULL) { + return; + } + + struct output *output = + calloc(1, sizeof(struct output)); + output->wlr = wlr_output; + output->server = server; + output->in_timeline = in_timeline; + output->out_timeline = out_timeline; + output->frame.notify = output_handle_frame; + wl_signal_add(&wlr_output->events.frame, &output->frame); + wl_list_insert(&server->outputs, &output->link); + + if (!wl_list_empty(&wlr_output->modes)) { + struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output); + wlr_output_set_mode(wlr_output, mode); + wlr_output_commit(wlr_output); + } + + wlr_output_create_global(wlr_output); +} + +static void surface_handle_destroy(struct wl_listener *listener, void *data) { + struct surface *surface = wl_container_of(listener, surface, destroy); + wlr_render_timeline_destroy(surface->timeline); + wl_list_remove(&surface->destroy.link); + wl_list_remove(&surface->link); + free(surface); +} + +static void server_handle_new_surface(struct wl_listener *listener, + void *data) { + struct server *server = wl_container_of(listener, server, new_surface); + struct wlr_surface *wlr_surface = data; + + int drm_fd = wlr_renderer_get_drm_fd(server->renderer); + struct wlr_render_timeline *timeline = wlr_render_timeline_create(drm_fd); + if (timeline == NULL) { + return; + } + + struct surface *surface = calloc(1, sizeof(struct surface)); + surface->wlr = wlr_surface; + surface->timeline = timeline; + surface->destroy.notify = surface_handle_destroy; + wl_signal_add(&wlr_surface->events.destroy, &surface->destroy); + + wl_list_insert(&server->surfaces, &surface->link); +} + +int main(int argc, char *argv[]) { + wlr_log_init(WLR_DEBUG, NULL); + + const char *startup_cmd = NULL; + int c; + while ((c = getopt(argc, argv, "s:")) != -1) { + switch (c) { + case 's': + startup_cmd = optarg; + break; + default: + printf("usage: %s [-s startup-command]\n", argv[0]); + return EXIT_FAILURE; + } + } + if (optind < argc) { + printf("usage: %s [-s startup-command]\n", argv[0]); + return EXIT_FAILURE; + } + + struct server server = {0}; + server.display = wl_display_create(); + server.backend = wlr_backend_autocreate(server.display); + server.renderer = wlr_backend_get_renderer(server.backend); + wlr_renderer_init_wl_display(server.renderer, server.display); + + struct wlr_compositor *compositor = + wlr_compositor_create(server.display, server.renderer); + + wlr_xdg_shell_create(server.display); + + server.explicit_sync_v1 = + wlr_linux_explicit_synchronization_v1_create(server.display); + + wl_list_init(&server.outputs); + wl_list_init(&server.surfaces); + + server.new_output.notify = server_handle_new_output; + wl_signal_add(&server.backend->events.new_output, &server.new_output); + + server.new_surface.notify = server_handle_new_surface; + wl_signal_add(&compositor->events.new_surface, &server.new_surface); + + const char *socket = wl_display_add_socket_auto(server.display); + if (!socket) { + wl_display_destroy(server.display); + return EXIT_FAILURE; + } + + if (!wlr_backend_start(server.backend)) { + wl_display_destroy(server.display); + return EXIT_FAILURE; + } + + setenv("WAYLAND_DISPLAY", socket, true); + if (startup_cmd != NULL) { + if (fork() == 0) { + execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL); + } + } + + wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s", + socket); + wl_display_run(server.display); + + wl_display_destroy_clients(server.display); + wl_display_destroy(server.display); + return EXIT_SUCCESS; +} diff --git a/examples/meson.build b/examples/meson.build index 1e428e81b2..c86b165d9b 100644 --- a/examples/meson.build +++ b/examples/meson.build @@ -55,6 +55,10 @@ compositors = { 'src': 'scene-graph.c', 'proto': ['xdg-shell'], }, + 'explicit-sync': { + 'src': 'explicit-sync.c', + 'proto': ['xdg-shell'], + }, } clients = {