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#include <stdbool.h>
#include <stdlib.h>
#include <xcb/xcb.h>
#include <X11/Xlib-xcb.h>
#include <wayland-server.h>
#include <wlr/backend/interface.h>
#include <wlr/backend/x11.h>
#include <wlr/egl.h>
#include <wlr/util/log.h>
#include "backend/x11.h"
static struct wlr_backend_impl backend_impl;
int x11_event(int fd, uint32_t mask, void *data) {
struct wlr_x11_backend *x11 = data;
xcb_generic_event_t *event = xcb_wait_for_event(x11->xcb_conn);
if (!event) {
return 0;
}
switch (event->response_type) {
case XCB_EXPOSE:
break;
case XCB_KEY_PRESS:
break;
default:
wlr_log(L_INFO, "Unknown event");
break;
}
free(event);
return 0;
}
struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
const char *x11_display) {
struct wlr_x11_backend *x11 = calloc(1, sizeof(*x11));
if (!x11) {
return NULL;
}
wlr_backend_init(&x11->backend, &backend_impl);
x11->xlib_conn = XOpenDisplay(x11_display);
if (!x11->xlib_conn) {
wlr_log(L_ERROR, "Failed to open X connection");
return NULL;
}
x11->xcb_conn = XGetXCBConnection(x11->xlib_conn);
if (!x11->xcb_conn || xcb_connection_has_error(x11->xcb_conn)) {
wlr_log(L_ERROR, "Failed to open xcb connection");
goto error;
}
int fd = xcb_get_file_descriptor(x11->xcb_conn);
struct wl_event_loop *ev = wl_display_get_event_loop(display);
x11->event_source = wl_event_loop_add_fd(ev, fd, WL_EVENT_READABLE, x11_event, x11);
if (!x11->event_source) {
wlr_log(L_ERROR, "Could not create event source");
goto error;
}
return &x11->backend;
error:
xcb_disconnect(x11->xcb_conn);
XCloseDisplay(x11->xlib_conn);
free(x11);
return NULL;
}
static bool wlr_x11_backend_start(struct wlr_backend *backend) {
struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
xcb_screen_t *screen = xcb_setup_roots_iterator(xcb_get_setup(x11->xcb_conn)).data;
uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
uint32_t values[2] = {
screen->white_pixel,
XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS
};
x11->win = xcb_generate_id(x11->xcb_conn);
xcb_create_window(x11->xcb_conn, XCB_COPY_FROM_PARENT, x11->win, screen->root,
0, 0, 1024, 768, 1, XCB_WINDOW_CLASS_INPUT_OUTPUT,
screen->root_visual, mask, values);
xcb_map_window(x11->xcb_conn, x11->win);
xcb_flush(x11->xcb_conn);
return true;
}
static void wlr_x11_backend_destroy(struct wlr_backend *backend) {
if (!backend) {
return;
}
struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
xcb_disconnect(x11->xcb_conn);
free(x11);
}
struct wlr_egl *wlr_x11_backend_get_egl(struct wlr_backend *backend) {
return NULL;
}
bool wlr_backend_is_x11(struct wlr_backend *backend) {
return backend->impl == &backend_impl;
}
static struct wlr_backend_impl backend_impl = {
.start = wlr_x11_backend_start,
.destroy = wlr_x11_backend_destroy,
.get_egl = wlr_x11_backend_get_egl,
};
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