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#include <wayland-client.h>
#include <wayland-egl.h>
#include <poll.h>
#include <errno.h>
#include <string.h>
#include "eglutint.h"
struct display {
struct wl_display *display;
struct wl_compositor *compositor;
struct wl_shell *shell;
uint32_t mask;
};
struct window {
struct wl_surface *surface;
struct wl_shell_surface *shell_surface;
struct wl_callback *callback;
};
static struct display display = {0, };
static struct window window = {0, };
static void
registry_handle_global(void *data, struct wl_registry *registry, uint32_t id,
const char *interface, uint32_t version)
{
struct display *d = data;
if (strcmp(interface, "wl_compositor") == 0) {
d->compositor =
wl_registry_bind(registry, id, &wl_compositor_interface, 1);
} else if (strcmp(interface, "wl_shell") == 0) {
d->shell = wl_registry_bind(registry, id, &wl_shell_interface, 1);
}
}
static void
registry_handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name)
{
}
static const struct wl_registry_listener registry_listener = {
registry_handle_global,
registry_handle_global_remove
};
static void
sync_callback(void *data, struct wl_callback *callback, uint32_t serial)
{
int *done = data;
*done = 1;
wl_callback_destroy(callback);
}
static const struct wl_callback_listener sync_listener = {
sync_callback
};
static int
wayland_roundtrip(struct wl_display *display)
{
struct wl_callback *callback;
int done = 0, ret = 0;
callback = wl_display_sync(display);
wl_callback_add_listener(callback, &sync_listener, &done);
while (ret != -1 && !done)
ret = wl_display_dispatch(display);
if (!done)
wl_callback_destroy(callback);
return ret;
}
void
_eglutNativeInitDisplay(void)
{
struct wl_registry *registry;
_eglut->native_dpy = display.display = wl_display_connect(NULL);
if (!_eglut->native_dpy)
_eglutFatal("failed to initialize native display");
registry = wl_display_get_registry(_eglut->native_dpy);
wl_registry_add_listener(registry, ®istry_listener, &display);
wayland_roundtrip(_eglut->native_dpy);
wl_registry_destroy(registry);
_eglut->surface_type = EGL_WINDOW_BIT;
}
void
_eglutNativeFiniDisplay(void)
{
wl_display_flush(_eglut->native_dpy);
wl_display_disconnect(_eglut->native_dpy);
}
void
_eglutNativeInitWindow(struct eglut_window *win, const char *title,
int x, int y, int w, int h)
{
struct wl_egl_window *native;
struct wl_region *region;
window.surface = wl_compositor_create_surface(display.compositor);
region = wl_compositor_create_region(display.compositor);
wl_region_add(region, 0, 0, w, h);
wl_surface_set_opaque_region(window.surface, region);
wl_region_destroy(region);
window.shell_surface = wl_shell_get_shell_surface(display.shell,
window.surface);
native = wl_egl_window_create(window.surface, w, h);
wl_shell_surface_set_toplevel(window.shell_surface);
win->native.u.window = native;
win->native.width = w;
win->native.height = h;
}
void
_eglutNativeFiniWindow(struct eglut_window *win)
{
wl_egl_window_destroy(win->native.u.window);
wl_shell_surface_destroy(window.shell_surface);
wl_surface_destroy(window.surface);
if (window.callback)
wl_callback_destroy(window.callback);
}
static void
draw(void *data, struct wl_callback *callback, uint32_t time);
static const struct wl_callback_listener frame_listener = {
draw
};
static void
draw(void *data, struct wl_callback *callback, uint32_t time)
{
struct window *window = (struct window *)data;
struct eglut_window *win = _eglut->current;
if (win->display_cb)
win->display_cb();
eglSwapBuffers(_eglut->dpy, win->surface);
if (callback)
wl_callback_destroy(callback);
window->callback = wl_surface_frame(window->surface);
wl_callback_add_listener(window->callback, &frame_listener, window);
}
void
_eglutNativeEventLoop(void)
{
struct pollfd pollfd;
int ret;
draw(&window, NULL, 0);
pollfd.fd = wl_display_get_fd(display.display);
pollfd.events = POLLIN;
pollfd.revents = 0;
while (1) {
wl_display_dispatch_pending(display.display);
if (_eglut->idle_cb)
_eglut->idle_cb();
ret = wl_display_flush(display.display);
if (ret < 0 && errno == EAGAIN)
pollfd.events |= POLLOUT;
else if (ret < 0)
break;
if (poll(&pollfd, 1, _eglut->redisplay ? 0 : -1) == -1)
break;
if (pollfd.revents & (POLLERR | POLLHUP))
break;
if (pollfd.revents & POLLIN) {
ret = wl_display_dispatch(display.display);
if (ret == -1)
break;
}
if (pollfd.revents & POLLOUT) {
ret = wl_display_flush(display.display);
if (ret == 0)
pollfd.events &= ~POLLOUT;
else if (ret == -1 && errno != EAGAIN)
break;
}
if (_eglut->redisplay) {
struct eglut_window *win = _eglut->current;
_eglut->redisplay = 0;
if (win->display_cb)
win->display_cb();
eglSwapBuffers(_eglut->dpy, win->surface);
}
}
}
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