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#define _POSIX_C_SOURCE 200112L
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wayland-client.h>
#include <wayland-egl.h>
#include <wayland-server.h>
#include <wlr/backend/wayland.h>
#include <wlr/render/allocator.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_scene.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/util/log.h>
#include "xdg-shell-client-protocol.h"
static struct wl_display *remote_display = NULL;
static struct wl_compositor *compositor = NULL;
static struct wl_subcompositor *subcompositor = NULL;
static struct xdg_wm_base *wm_base = NULL;
static struct wl_egl_window *egl_window = NULL;
static struct wlr_egl_surface *egl_surface = NULL;
static struct wl_surface *main_surface = NULL;
static struct wl_callback *frame_callback = NULL;
static struct wlr_scene *scene = NULL;
static struct wlr_scene_output *scene_output = NULL;
static struct wl_listener new_surface = {0};
static struct wl_listener output_frame = {0};
static EGLDisplay egl_display;
static EGLConfig egl_config;
static EGLContext egl_context;
static int width = 500;
static int height = 500;
static void draw_main_surface(void);
static void frame_handle_done(void *data, struct wl_callback *callback, uint32_t t) {
wl_callback_destroy(callback);
frame_callback = NULL;
draw_main_surface();
}
static const struct wl_callback_listener frame_listener = {
.done = frame_handle_done,
};
static void draw_main_surface(void) {
frame_callback = wl_surface_frame(main_surface);
wl_callback_add_listener(frame_callback, &frame_listener, NULL);
eglMakeCurrent(egl_display, egl_surface, egl_surface, egl_context);
eglSwapInterval(egl_display, 0);
glViewport(0, 0, width, height);
glClearColor(1, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
eglSwapBuffers(egl_display, egl_surface);
wl_display_flush(remote_display);
}
static void xdg_surface_handle_configure(void *data,
struct xdg_surface *xdg_surface, uint32_t serial) {
xdg_surface_ack_configure(xdg_surface, serial);
if (frame_callback == NULL) {
draw_main_surface();
}
}
static const struct xdg_surface_listener xdg_surface_listener = {
.configure = xdg_surface_handle_configure,
};
static void xdg_toplevel_handle_configure(void *data,
struct xdg_toplevel *xdg_toplevel, int32_t w, int32_t h,
struct wl_array *states) {
if (w != 0 && h != 0) {
width = w;
height = h;
}
}
static const struct xdg_toplevel_listener xdg_toplevel_listener = {
.configure = xdg_toplevel_handle_configure,
};
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
if (strcmp(interface, wl_compositor_interface.name) == 0) {
compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 4);
} else if (strcmp(interface, wl_subcompositor_interface.name) == 0) {
subcompositor = wl_registry_bind(registry, name, &wl_subcompositor_interface, 1);
} else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
wm_base = wl_registry_bind(registry, name, &xdg_wm_base_interface, 1);
}
}
static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) {
// Who cares?
}
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = handle_global_remove,
};
static void output_handle_frame(struct wl_listener *listener, void *data) {
wlr_scene_output_commit(scene_output, NULL);
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
wlr_scene_output_send_frame_done(scene_output, &now);
}
static void handle_new_surface(struct wl_listener *listener, void *data) {
struct wlr_surface *wlr_surface = data;
wlr_scene_surface_create(&scene->tree, wlr_surface);
}
static void init_egl(struct wl_display *display) {
egl_display = eglGetPlatformDisplay(EGL_PLATFORM_WAYLAND_KHR, display, NULL);
eglInitialize(egl_display, NULL, NULL);
EGLint matched = 0;
const EGLint config_attribs[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE,
};
eglChooseConfig(egl_display, config_attribs, &egl_config, 1, &matched);
const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE,
};
egl_context = eglCreateContext(egl_display, egl_config, EGL_NO_CONTEXT, context_attribs);
}
int main(int argc, char *argv[]) {
wlr_log_init(WLR_DEBUG, NULL);
remote_display = wl_display_connect(NULL);
struct wl_registry *registry = wl_display_get_registry(remote_display);
wl_registry_add_listener(registry, ®istry_listener, NULL);
wl_display_roundtrip(remote_display);
init_egl(remote_display);
struct wl_display *local_display = wl_display_create();
struct wlr_backend *backend = wlr_wl_backend_create(local_display, remote_display);
struct wlr_renderer *renderer = wlr_renderer_autocreate(backend);
wlr_renderer_init_wl_display(renderer, local_display);
struct wlr_allocator *allocator = wlr_allocator_autocreate(backend, renderer);
scene = wlr_scene_create();
struct wlr_compositor *wlr_compositor = wlr_compositor_create(local_display, 5, renderer);
wlr_xdg_shell_create(local_display, 2);
new_surface.notify = handle_new_surface;
wl_signal_add(&wlr_compositor->events.new_surface, &new_surface);
wlr_backend_start(backend);
main_surface = wl_compositor_create_surface(compositor);
struct xdg_surface *xdg_surface = xdg_wm_base_get_xdg_surface(wm_base, main_surface);
struct xdg_toplevel *xdg_toplevel = xdg_surface_get_toplevel(xdg_surface);
xdg_surface_add_listener(xdg_surface, &xdg_surface_listener, NULL);
xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, NULL);
egl_window = wl_egl_window_create(main_surface, width, height);
egl_surface = eglCreatePlatformWindowSurface(egl_display,
egl_config, egl_window, NULL);
struct wl_surface *child_surface = wl_compositor_create_surface(compositor);
struct wl_subsurface *subsurface = wl_subcompositor_get_subsurface(subcompositor, child_surface, main_surface);
wl_subsurface_set_position(subsurface, 20, 20);
struct wlr_output *output = wlr_wl_output_create_from_surface(backend, child_surface);
wlr_output_init_render(output, allocator, renderer);
scene_output = wlr_scene_output_create(scene, output);
output_frame.notify = output_handle_frame;
wl_signal_add(&output->events.frame, &output_frame);
struct wlr_output_state state;
wlr_output_state_init(&state);
wlr_output_state_set_enabled(&state, true);
wlr_output_commit_state(output, &state);
wlr_output_state_finish(&state);
wl_surface_commit(main_surface);
wl_display_flush(remote_display);
const char *socket = wl_display_add_socket_auto(local_display);
setenv("WAYLAND_DISPLAY", socket, true);
wlr_log(WLR_INFO, "Running embedded Wayland compositor on WAYLAND_DISPLAY=%s", socket);
wl_display_run(local_display);
return 0;
}
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