314 lines
8.2 KiB
C
314 lines
8.2 KiB
C
#define _POSIX_C_SOURCE 200112L
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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 <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/config.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/gles2.h>
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#include <wlr/util/log.h>
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#include <X11/Xlib-xcb.h>
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#include <xcb/xcb.h>
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#ifdef WLR_HAS_XCB_XKB
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#include <xcb/xkb.h>
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#endif
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#include "backend/x11.h"
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#include "util/signal.h"
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struct wlr_x11_output *x11_output_from_window_id(struct wlr_x11_backend *x11,
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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 bool handle_x11_event(struct wlr_x11_backend *x11,
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xcb_generic_event_t *event) {
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if (x11_handle_input_event(x11, event)) {
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return false;
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}
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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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x11_output_from_window_id(x11, ev->window);
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if (output != NULL) {
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wlr_output_send_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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x11_output_from_window_id(x11, ev->window);
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if (output != NULL) {
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x11_output_handle_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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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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}
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return false;
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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_conn))) {
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bool quit = handle_x11_event(x11, e);
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free(e);
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if (quit) {
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break;
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}
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}
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return 0;
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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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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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{
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.name = "WM_PROTOCOLS",
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.atom = &x11->atoms.wm_protocols,
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},
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{
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.name = "WM_DELETE_WINDOW",
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.atom = &x11->atoms.wm_delete_window,
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},
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{
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.name = "_NET_WM_NAME",
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.atom = &x11->atoms.net_wm_name,
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},
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{
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.name = "UTF8_STRING",
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.atom = &x11->atoms.utf8_string,
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},
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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_conn,
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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_conn, 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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#ifdef WLR_HAS_XCB_XKB
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const xcb_query_extension_reply_t *reply =
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xcb_get_extension_data(x11->xcb_conn, &xcb_xkb_id);
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if (reply != NULL && reply->present) {
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x11->xkb_base_event = reply->first_event;
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x11->xkb_base_error = reply->first_error;
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xcb_xkb_use_extension_cookie_t cookie = xcb_xkb_use_extension(
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x11->xcb_conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
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xcb_xkb_use_extension_reply_t *reply =
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xcb_xkb_use_extension_reply(x11->xcb_conn, cookie, NULL);
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if (reply != NULL && reply->supported) {
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x11->xkb_supported = true;
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xcb_xkb_select_events(x11->xcb_conn,
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XCB_XKB_ID_USE_CORE_KBD,
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XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
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0,
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XCB_XKB_EVENT_TYPE_STATE_NOTIFY,
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0,
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0,
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0);
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}
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}
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#endif
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wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->keyboard_dev);
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wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->pointer_dev);
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for (size_t i = 0; i < x11->requested_outputs; ++i) {
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x11_output_create(x11);
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}
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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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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_signal_emit_safe(&x11->pointer_dev.events.destroy, &x11->pointer_dev);
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wlr_signal_emit_safe(&x11->keyboard_dev.events.destroy, &x11->keyboard_dev);
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// TODO probably need to use wlr_keyboard_destroy, but the devices need to
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// be malloced for that to work
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if (x11->keyboard_dev.keyboard->keymap) {
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xkb_keymap_unref(x11->keyboard_dev.keyboard->keymap);
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}
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if (x11->keyboard_dev.keyboard->xkb_state) {
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xkb_state_unref(x11->keyboard_dev.keyboard->xkb_state);
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}
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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_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_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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static struct wlr_renderer *wlr_x11_backend_get_renderer(
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struct wlr_backend *backend) {
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struct wlr_x11_backend *x11 = (struct wlr_x11_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 = 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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.get_renderer = wlr_x11_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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wlr_x11_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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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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x11->requested_outputs = 1;
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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(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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XSetEventQueueOwner(x11->xlib_conn, XCBOwnsEventQueue);
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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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int 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(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, x11->xlib_conn, NULL,
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x11->screen->root_visual)) {
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goto error_event;
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}
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x11->renderer = wlr_gles2_renderer_create(&x11->backend);
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if (x11->renderer == NULL) {
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wlr_log(L_ERROR, "Failed to create renderer");
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goto error_egl;
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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, NULL);
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x11->keyboard_dev.keyboard = &x11->keyboard;
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wlr_input_device_init(&x11->pointer_dev, WLR_INPUT_DEVICE_POINTER,
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&input_device_impl, "X11 pointer", 0, 0);
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wlr_pointer_init(&x11->pointer, NULL);
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x11->pointer_dev.pointer = &x11->pointer;
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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_egl:
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wlr_egl_finish(&x11->egl);
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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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XCloseDisplay(x11->xlib_conn);
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free(x11);
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return NULL;
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}
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