131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
#include <stdbool.h>
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#include <stdlib.h>
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#include <xcb/xcb.h>
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#include <X11/Xlib-xcb.h>
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#include <wayland-server.h>
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#include <wlr/backend/interface.h>
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#include <wlr/backend/x11.h>
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#include <wlr/egl.h>
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#include <wlr/util/log.h>
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#include "backend/x11.h"
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static struct wlr_backend_impl backend_impl;
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int x11_event(int fd, uint32_t mask, void *data) {
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struct wlr_x11_backend *x11 = data;
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xcb_generic_event_t *event = xcb_wait_for_event(x11->xcb_conn);
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if (!event) {
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return 0;
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}
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switch (event->response_type) {
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case XCB_EXPOSE:
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break;
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case XCB_KEY_PRESS:
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break;
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default:
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wlr_log(L_INFO, "Unknown event");
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break;
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}
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free(event);
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return 0;
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}
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struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
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const char *x11_display) {
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struct wlr_x11_backend *x11 = calloc(1, sizeof(*x11));
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if (!x11) {
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return NULL;
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}
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wlr_backend_init(&x11->backend, &backend_impl);
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x11->xlib_conn = XOpenDisplay(x11_display);
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if (!x11->xlib_conn) {
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wlr_log(L_ERROR, "Failed to open X connection");
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return NULL;
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}
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x11->xcb_conn = XGetXCBConnection(x11->xlib_conn);
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if (!x11->xcb_conn || xcb_connection_has_error(x11->xcb_conn)) {
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wlr_log(L_ERROR, "Failed to open xcb connection");
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goto error_x11;
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}
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int fd = xcb_get_file_descriptor(x11->xcb_conn);
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struct wl_event_loop *ev = wl_display_get_event_loop(display);
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x11->event_source = wl_event_loop_add_fd(ev, fd, WL_EVENT_READABLE, x11_event, x11);
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if (!x11->event_source) {
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wlr_log(L_ERROR, "Could not create event source");
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goto error_x11;
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}
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x11->screen = xcb_setup_roots_iterator(xcb_get_setup(x11->xcb_conn)).data;
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if (!wlr_egl_init(&x11->egl, EGL_PLATFORM_X11_KHR,
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x11->screen->root_visual, x11->xlib_conn)) {
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goto error_event;
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}
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return &x11->backend;
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error_event:
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wl_event_source_remove(x11->event_source);
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error_x11:
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xcb_disconnect(x11->xcb_conn);
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XCloseDisplay(x11->xlib_conn);
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free(x11);
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return NULL;
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}
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static bool wlr_x11_backend_start(struct wlr_backend *backend) {
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struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
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uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
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uint32_t values[2] = {
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x11->screen->white_pixel,
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XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS
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};
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x11->win = xcb_generate_id(x11->xcb_conn);
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xcb_create_window(x11->xcb_conn, XCB_COPY_FROM_PARENT, x11->win, x11->screen->root,
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0, 0, 1024, 768, 1, XCB_WINDOW_CLASS_INPUT_OUTPUT,
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x11->screen->root_visual, mask, values);
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xcb_map_window(x11->xcb_conn, x11->win);
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xcb_flush(x11->xcb_conn);
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return true;
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}
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static void wlr_x11_backend_destroy(struct wlr_backend *backend) {
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if (!backend) {
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return;
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}
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struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
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wlr_egl_free(&x11->egl);
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xcb_disconnect(x11->xcb_conn);
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free(x11);
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}
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static struct wlr_egl *wlr_x11_backend_get_egl(struct wlr_backend *backend) {
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struct wlr_x11_backend *x11 = (struct wlr_x11_backend *)backend;
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return &x11->egl;
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}
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bool wlr_backend_is_x11(struct wlr_backend *backend) {
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return backend->impl == &backend_impl;
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}
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static struct wlr_backend_impl backend_impl = {
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.start = wlr_x11_backend_start,
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.destroy = wlr_x11_backend_destroy,
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.get_egl = wlr_x11_backend_get_egl,
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};
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