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315 lines
8.3 KiB
315 lines
8.3 KiB
#define _POSIX_C_SOURCE 200112L
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#include <assert.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <wlr/config.h>
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#include <X11/Xlib-xcb.h>
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#include <wayland-server-core.h>
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#include <xcb/xcb.h>
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#include <xcb/xfixes.h>
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#include <xcb/xinput.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/interfaces/wlr_input_device.h>
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#include <wlr/interfaces/wlr_keyboard.h>
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#include <wlr/interfaces/wlr_pointer.h>
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#include <wlr/render/egl.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/util/log.h>
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#include "backend/x11.h"
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#include "util/signal.h"
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struct wlr_x11_output *get_x11_output_from_window_id(
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struct wlr_x11_backend *x11, xcb_window_t window) {
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struct wlr_x11_output *output;
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wl_list_for_each(output, &x11->outputs, link) {
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if (output->win == window) {
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return output;
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}
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}
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return NULL;
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}
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static void handle_x11_event(struct wlr_x11_backend *x11,
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xcb_generic_event_t *event) {
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switch (event->response_type & XCB_EVENT_RESPONSE_TYPE_MASK) {
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case XCB_EXPOSE: {
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xcb_expose_event_t *ev = (xcb_expose_event_t *)event;
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struct wlr_x11_output *output =
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get_x11_output_from_window_id(x11, ev->window);
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if (output != NULL) {
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wlr_output_update_needs_frame(&output->wlr_output);
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}
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break;
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}
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case XCB_CONFIGURE_NOTIFY: {
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xcb_configure_notify_event_t *ev =
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(xcb_configure_notify_event_t *)event;
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struct wlr_x11_output *output =
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get_x11_output_from_window_id(x11, ev->window);
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if (output != NULL) {
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handle_x11_configure_notify(output, ev);
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}
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break;
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}
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case XCB_CLIENT_MESSAGE: {
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xcb_client_message_event_t *ev = (xcb_client_message_event_t *)event;
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if (ev->data.data32[0] == x11->atoms.wm_delete_window) {
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struct wlr_x11_output *output =
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get_x11_output_from_window_id(x11, ev->window);
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if (output != NULL) {
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wlr_output_destroy(&output->wlr_output);
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}
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}
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break;
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}
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case XCB_GE_GENERIC: {
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xcb_ge_generic_event_t *ev = (xcb_ge_generic_event_t *)event;
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if (ev->extension == x11->xinput_opcode) {
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handle_x11_xinput_event(x11, ev);
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}
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}
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}
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}
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static int x11_event(int fd, uint32_t mask, void *data) {
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struct wlr_x11_backend *x11 = data;
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if ((mask & WL_EVENT_HANGUP) || (mask & WL_EVENT_ERROR)) {
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wl_display_terminate(x11->wl_display);
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return 0;
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}
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xcb_generic_event_t *e;
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while ((e = xcb_poll_for_event(x11->xcb))) {
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handle_x11_event(x11, e);
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free(e);
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}
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return 0;
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}
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struct wlr_x11_backend *get_x11_backend_from_backend(
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struct wlr_backend *wlr_backend) {
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assert(wlr_backend_is_x11(wlr_backend));
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return (struct wlr_x11_backend *)wlr_backend;
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}
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static bool backend_start(struct wlr_backend *backend) {
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struct wlr_x11_backend *x11 = get_x11_backend_from_backend(backend);
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x11->started = true;
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wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->keyboard_dev);
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for (size_t i = 0; i < x11->requested_outputs; ++i) {
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wlr_x11_output_create(&x11->backend);
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}
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return true;
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}
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static void 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 = get_x11_backend_from_backend(backend);
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struct wlr_x11_output *output, *tmp;
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wl_list_for_each_safe(output, tmp, &x11->outputs, link) {
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wlr_output_destroy(&output->wlr_output);
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}
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wlr_input_device_destroy(&x11->keyboard_dev);
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wlr_signal_emit_safe(&backend->events.destroy, backend);
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if (x11->event_source) {
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wl_event_source_remove(x11->event_source);
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}
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wl_list_remove(&x11->display_destroy.link);
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wlr_renderer_destroy(x11->renderer);
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wlr_egl_finish(&x11->egl);
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if (x11->xlib_conn) {
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XCloseDisplay(x11->xlib_conn);
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}
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free(x11);
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}
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static struct wlr_renderer *backend_get_renderer(
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struct wlr_backend *backend) {
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struct wlr_x11_backend *x11 = get_x11_backend_from_backend(backend);
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return x11->renderer;
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}
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static const struct wlr_backend_impl backend_impl = {
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.start = backend_start,
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.destroy = backend_destroy,
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.get_renderer = backend_get_renderer,
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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 void handle_display_destroy(struct wl_listener *listener, void *data) {
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struct wlr_x11_backend *x11 =
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wl_container_of(listener, x11, display_destroy);
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backend_destroy(&x11->backend);
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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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wlr_renderer_create_func_t create_renderer_func) {
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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->wl_display = display;
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wl_list_init(&x11->outputs);
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x11->xlib_conn = XOpenDisplay(x11_display);
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if (!x11->xlib_conn) {
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wlr_log(WLR_ERROR, "Failed to open X connection");
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goto error_x11;
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}
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x11->xcb = XGetXCBConnection(x11->xlib_conn);
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if (!x11->xcb || xcb_connection_has_error(x11->xcb)) {
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wlr_log(WLR_ERROR, "Failed to open xcb connection");
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goto error_display;
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}
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XSetEventQueueOwner(x11->xlib_conn, XCBOwnsEventQueue);
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struct {
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const char *name;
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xcb_intern_atom_cookie_t cookie;
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xcb_atom_t *atom;
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} atom[] = {
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{ .name = "WM_PROTOCOLS", .atom = &x11->atoms.wm_protocols },
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{ .name = "WM_DELETE_WINDOW", .atom = &x11->atoms.wm_delete_window },
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{ .name = "_NET_WM_NAME", .atom = &x11->atoms.net_wm_name },
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{ .name = "UTF8_STRING", .atom = &x11->atoms.utf8_string },
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};
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for (size_t i = 0; i < sizeof(atom) / sizeof(atom[0]); ++i) {
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atom[i].cookie = xcb_intern_atom(x11->xcb,
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true, strlen(atom[i].name), atom[i].name);
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}
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for (size_t i = 0; i < sizeof(atom) / sizeof(atom[0]); ++i) {
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xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(
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x11->xcb, atom[i].cookie, NULL);
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if (reply) {
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*atom[i].atom = reply->atom;
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free(reply);
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} else {
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*atom[i].atom = XCB_ATOM_NONE;
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}
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}
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const xcb_query_extension_reply_t *ext;
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ext = xcb_get_extension_data(x11->xcb, &xcb_xfixes_id);
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if (!ext || !ext->present) {
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wlr_log(WLR_ERROR, "X11 does not support Xfixes extension");
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goto error_display;
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}
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xcb_xfixes_query_version_cookie_t fixes_cookie =
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xcb_xfixes_query_version(x11->xcb, 4, 0);
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xcb_xfixes_query_version_reply_t *fixes_reply =
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xcb_xfixes_query_version_reply(x11->xcb, fixes_cookie, NULL);
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if (!fixes_reply || fixes_reply->major_version < 4) {
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wlr_log(WLR_ERROR, "X11 does not support required Xfixes version");
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free(fixes_reply);
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goto error_display;
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}
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free(fixes_reply);
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ext = xcb_get_extension_data(x11->xcb, &xcb_input_id);
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if (!ext || !ext->present) {
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wlr_log(WLR_ERROR, "X11 does not support Xinput extension");
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goto error_display;
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}
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x11->xinput_opcode = ext->major_opcode;
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xcb_input_xi_query_version_cookie_t xi_cookie =
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xcb_input_xi_query_version(x11->xcb, 2, 0);
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xcb_input_xi_query_version_reply_t *xi_reply =
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xcb_input_xi_query_version_reply(x11->xcb, xi_cookie, NULL);
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if (!xi_reply || xi_reply->major_version < 2) {
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wlr_log(WLR_ERROR, "X11 does not support required Xinput version");
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free(xi_reply);
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goto error_display;
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}
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free(xi_reply);
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int fd = xcb_get_file_descriptor(x11->xcb);
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struct wl_event_loop *ev = wl_display_get_event_loop(display);
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uint32_t events = WL_EVENT_READABLE | WL_EVENT_ERROR | WL_EVENT_HANGUP;
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x11->event_source = wl_event_loop_add_fd(ev, fd, events, x11_event, x11);
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if (!x11->event_source) {
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wlr_log(WLR_ERROR, "Could not create event source");
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goto error_display;
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}
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wl_event_source_check(x11->event_source);
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x11->screen = xcb_setup_roots_iterator(xcb_get_setup(x11->xcb)).data;
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if (!create_renderer_func) {
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create_renderer_func = wlr_renderer_autocreate;
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}
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static EGLint config_attribs[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RED_SIZE, 1,
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EGL_GREEN_SIZE, 1,
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EGL_BLUE_SIZE, 1,
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EGL_ALPHA_SIZE, 0,
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EGL_NONE,
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};
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x11->renderer = create_renderer_func(&x11->egl, EGL_PLATFORM_X11_KHR,
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x11->xlib_conn, config_attribs, x11->screen->root_visual);
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if (x11->renderer == NULL) {
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wlr_log(WLR_ERROR, "Failed to create renderer");
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goto error_event;
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}
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wlr_input_device_init(&x11->keyboard_dev, WLR_INPUT_DEVICE_KEYBOARD,
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&input_device_impl, "X11 keyboard", 0, 0);
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wlr_keyboard_init(&x11->keyboard, &keyboard_impl);
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x11->keyboard_dev.keyboard = &x11->keyboard;
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x11->display_destroy.notify = handle_display_destroy;
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wl_display_add_destroy_listener(display, &x11->display_destroy);
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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_display:
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XCloseDisplay(x11->xlib_conn);
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error_x11:
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free(x11);
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return NULL;
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}
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