wlroots/examples/fullscreen-shell.c

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#define _POSIX_C_SOURCE 200112L
#include <getopt.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_fullscreen_shell_v1.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_surface.h>
2021-07-01 20:36:01 +00:00
#include <wlr/util/box.h>
#include <wlr/util/log.h>
/**
* A minimal fullscreen-shell server. It only supports rendering.
*/
struct fullscreen_server {
struct wl_display *wl_display;
struct wlr_backend *backend;
struct wlr_renderer *renderer;
struct wlr_allocator *allocator;
struct wlr_fullscreen_shell_v1 *fullscreen_shell;
struct wl_listener present_surface;
struct wlr_output_layout *output_layout;
struct wl_list outputs;
struct wl_listener new_output;
};
struct fullscreen_output {
struct wl_list link;
struct fullscreen_server *server;
struct wlr_output *wlr_output;
struct wlr_surface *surface;
struct wl_listener surface_destroy;
struct wl_listener frame;
};
struct render_data {
struct wlr_output *output;
struct wlr_renderer *renderer;
struct timespec *when;
};
static void render_surface(struct wlr_surface *surface,
int sx, int sy, void *data) {
struct render_data *rdata = data;
struct wlr_output *output = rdata->output;
struct wlr_texture *texture = wlr_surface_get_texture(surface);
if (texture == NULL) {
return;
}
struct wlr_box box = {
.x = sx * output->scale,
.y = sy * output->scale,
.width = surface->current.width * output->scale,
.height = surface->current.height * output->scale,
};
float matrix[9];
enum wl_output_transform transform =
wlr_output_transform_invert(surface->current.transform);
wlr_matrix_project_box(matrix, &box, transform, 0,
output->transform_matrix);
wlr_render_texture_with_matrix(rdata->renderer, texture, matrix, 1);
wlr_surface_send_frame_done(surface, rdata->when);
}
static void output_handle_frame(struct wl_listener *listener, void *data) {
struct fullscreen_output *output =
wl_container_of(listener, output, frame);
struct wlr_renderer *renderer = output->server->renderer;
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
int width, height;
wlr_output_effective_resolution(output->wlr_output, &width, &height);
if (!wlr_output_attach_render(output->wlr_output, NULL)) {
return;
}
wlr_renderer_begin(renderer, width, height);
float color[4] = {0.3, 0.3, 0.3, 1.0};
wlr_renderer_clear(renderer, color);
if (output->surface != NULL) {
struct render_data rdata = {
.output = output->wlr_output,
.renderer = renderer,
.when = &now,
};
wlr_surface_for_each_surface(output->surface, render_surface, &rdata);
}
wlr_renderer_end(renderer);
wlr_output_commit(output->wlr_output);
}
static void output_set_surface(struct fullscreen_output *output,
struct wlr_surface *surface);
static void output_handle_surface_destroy(struct wl_listener *listener,
void *data) {
struct fullscreen_output *output =
wl_container_of(listener, output, surface_destroy);
output_set_surface(output, NULL);
}
static void output_set_surface(struct fullscreen_output *output,
struct wlr_surface *surface) {
if (output->surface == surface) {
return;
}
if (output->surface != NULL) {
wl_list_remove(&output->surface_destroy.link);
output->surface = NULL;
}
if (surface != NULL) {
output->surface_destroy.notify = output_handle_surface_destroy;
wl_signal_add(&surface->events.destroy, &output->surface_destroy);
output->surface = surface;
}
wlr_log(WLR_DEBUG, "Presenting surface %p on output %s",
surface, output->wlr_output->name);
}
static void server_handle_new_output(struct wl_listener *listener, void *data) {
struct fullscreen_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 fullscreen_output *output =
calloc(1, sizeof(struct fullscreen_output));
output->wlr_output = wlr_output;
output->server = server;
output->frame.notify = output_handle_frame;
wl_signal_add(&wlr_output->events.frame, &output->frame);
wl_list_insert(&server->outputs, &output->link);
wlr_output_layout_add_auto(server->output_layout, wlr_output);
wlr_output_create_global(wlr_output);
struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output);
if (mode != NULL) {
wlr_output_set_mode(wlr_output, mode);
}
wlr_output_commit(wlr_output);
}
static void server_handle_present_surface(struct wl_listener *listener,
void *data) {
struct fullscreen_server *server =
wl_container_of(listener, server, present_surface);
struct wlr_fullscreen_shell_v1_present_surface_event *event = data;
struct fullscreen_output *output;
wl_list_for_each(output, &server->outputs, link) {
if (event->output == NULL || event->output == output->wlr_output) {
output_set_surface(output, event->surface);
}
}
}
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 fullscreen_server server = {0};
server.wl_display = wl_display_create();
server.backend = wlr_backend_autocreate(server.wl_display);
server.renderer = wlr_renderer_autocreate(server.backend);
wlr_renderer_init_wl_display(server.renderer, server.wl_display);
server.allocator = wlr_allocator_autocreate(server.backend,
server.renderer);
wlr_compositor_create(server.wl_display, server.renderer);
server.output_layout = wlr_output_layout_create();
wl_list_init(&server.outputs);
server.new_output.notify = server_handle_new_output;
wl_signal_add(&server.backend->events.new_output, &server.new_output);
server.fullscreen_shell = wlr_fullscreen_shell_v1_create(server.wl_display);
server.present_surface.notify = server_handle_present_surface;
wl_signal_add(&server.fullscreen_shell->events.present_surface,
&server.present_surface);
const char *socket = wl_display_add_socket_auto(server.wl_display);
if (!socket) {
wl_display_destroy(server.wl_display);
return EXIT_FAILURE;
}
if (!wlr_backend_start(server.backend)) {
wl_display_destroy(server.wl_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.wl_display);
wl_display_destroy_clients(server.wl_display);
wl_display_destroy(server.wl_display);
return 0;
}