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Diffstat (limited to 'examples/scene-graph.c')
| -rw-r--r-- | examples/scene-graph.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/examples/scene-graph.c b/examples/scene-graph.c new file mode 100644 index 0000000..562f72e --- /dev/null +++ b/examples/scene-graph.c @@ -0,0 +1,210 @@ +#define _POSIX_C_SOURCE 200112L +#include <assert.h> +#include <getopt.h> +#include <scenefx/render/fx_renderer/fx_renderer.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <unistd.h> +#include <wayland-server-core.h> +#include <wlr/backend.h> +#include <wlr/render/allocator.h> +#include <wlr/render/wlr_renderer.h> +#include <wlr/types/wlr_compositor.h> +#include <wlr/types/wlr_output.h> +#include <wlr/types/wlr_scene.h> +#include <wlr/types/wlr_xdg_shell.h> +#include <wlr/util/log.h> + +/* Simple compositor making use of the scene-graph API. Input is unimplemented. + * + * New surfaces are stacked on top of the existing ones as they appear. */ + +static const int border_width = 3; + +struct server { + struct wl_display *display; + struct wlr_backend *backend; + struct wlr_renderer *renderer; + struct wlr_allocator *allocator; + struct wlr_scene *scene; + + uint32_t surface_offset; + + struct wl_listener new_output; + struct wl_listener new_surface; +}; + +struct surface { + struct wlr_surface *wlr; + struct wlr_scene_surface *scene_surface; + struct wlr_scene_rect *border; + struct wl_list link; + + struct wl_listener commit; + struct wl_listener destroy; +}; + +struct output { + struct wl_list link; + struct server *server; + struct wlr_output *wlr; + struct wlr_scene_output *scene_output; + + struct wl_listener frame; +}; + +static void output_handle_frame(struct wl_listener *listener, void *data) { + struct output *output = wl_container_of(listener, output, frame); + + if (!wlr_scene_output_commit(output->scene_output, NULL)) { + return; + } + + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + wlr_scene_output_send_frame_done(output->scene_output, &now); +} + +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; + + wlr_output_init_render(wlr_output, server->allocator, server->renderer); + + struct output *output = calloc(1, sizeof(*output)); + output->wlr = wlr_output; + output->server = server; + output->frame.notify = output_handle_frame; + wl_signal_add(&wlr_output->events.frame, &output->frame); + + output->scene_output = wlr_scene_output_create(server->scene, wlr_output); + + struct wlr_output_state state; + wlr_output_state_init(&state); + wlr_output_state_set_enabled(&state, true); + struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output); + if (mode != NULL) { + wlr_output_state_set_mode(&state, mode); + } + wlr_output_commit_state(wlr_output, &state); + wlr_output_state_finish(&state); + + wlr_output_create_global(wlr_output); +} + +static void surface_handle_commit(struct wl_listener *listener, void *data) { + struct surface *surface = wl_container_of(listener, surface, commit); + wlr_scene_rect_set_size(surface->border, + surface->wlr->current.width + 2 * border_width, + surface->wlr->current.height + 2 * border_width); +} + +static void surface_handle_destroy(struct wl_listener *listener, void *data) { + struct surface *surface = wl_container_of(listener, surface, destroy); + wlr_scene_node_destroy(&surface->scene_surface->buffer->node); + wlr_scene_node_destroy(&surface->border->node); + 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 pos = server->surface_offset; + server->surface_offset += 50; + + struct surface *surface = calloc(1, sizeof(*surface)); + surface->wlr = wlr_surface; + surface->commit.notify = surface_handle_commit; + wl_signal_add(&wlr_surface->events.commit, &surface->commit); + surface->destroy.notify = surface_handle_destroy; + wl_signal_add(&wlr_surface->events.destroy, &surface->destroy); + + /* Border dimensions will be set in surface.commit handler */ + surface->border = wlr_scene_rect_create(&server->scene->tree, + 0, 0, (float[4]){ 0.5f, 0.5f, 0.5f, 1 }); + wlr_scene_node_set_position(&surface->border->node, pos, pos); + + surface->scene_surface = + wlr_scene_surface_create(&server->scene->tree, wlr_surface); + + wlr_scene_node_set_position(&surface->scene_surface->buffer->node, + pos + border_width, pos + border_width); +} + +int main(int argc, char *argv[]) { + wlr_log_init(WLR_DEBUG, NULL); + + 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.surface_offset = 0; + server.display = wl_display_create(); + server.backend = wlr_backend_autocreate(server.display, NULL); + server.scene = wlr_scene_create(); + + server.renderer = fx_renderer_create(server.backend); + wlr_renderer_init_wl_display(server.renderer, server.display); + + server.allocator = wlr_allocator_autocreate(server.backend, + server.renderer); + + struct wlr_compositor *compositor = + wlr_compositor_create(server.display, 5, server.renderer); + + wlr_xdg_shell_create(server.display, 2); + + 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; +} + |