161 lines
4.6 KiB
C
161 lines
4.6 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include <assert.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <wayland-server.h>
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#include <wlr/egl.h>
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#include <wlr/backend/interface.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/interfaces/wlr_input_device.h>
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#include <wlr/util/log.h>
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#include "backend/wayland.h"
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#include "xdg-shell-unstable-v6-client-protocol.h"
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static int dispatch_events(int fd, uint32_t mask, void *data) {
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struct wlr_wl_backend *backend = data;
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int count = 0;
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if (mask & WL_EVENT_READABLE) {
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count = wl_display_dispatch(backend->remote_display);
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}
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if (mask == 0) {
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count = wl_display_dispatch_pending(backend->remote_display);
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wl_display_flush(backend->remote_display);
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}
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return count;
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}
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/*
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* Initializes the wayland backend. Opens a connection to a remote wayland
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* compositor and creates surfaces for each output, then registers globals on
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* the specified display.
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*/
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static bool wlr_wl_backend_start(struct wlr_backend *_backend) {
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struct wlr_wl_backend *backend = (struct wlr_wl_backend *)_backend;
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wlr_log(L_INFO, "Initializating wayland backend");
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backend->started = true;
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for (size_t i = 0; i < backend->requested_outputs; ++i) {
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wlr_wl_output_create(&backend->backend);
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}
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struct wl_event_loop *loop = wl_display_get_event_loop(backend->local_display);
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int fd = wl_display_get_fd(backend->remote_display);
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int events = WL_EVENT_READABLE | WL_EVENT_ERROR |
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WL_EVENT_HANGUP;
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backend->remote_display_src = wl_event_loop_add_fd(loop, fd, events,
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dispatch_events, backend);
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wl_event_source_check(backend->remote_display_src);
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return true;
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}
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static void wlr_wl_backend_destroy(struct wlr_backend *_backend) {
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struct wlr_wl_backend *backend = (struct wlr_wl_backend *)_backend;
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if (!_backend) {
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return;
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}
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for (size_t i = 0; i < backend->outputs->length; ++i) {
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wlr_output_destroy(backend->outputs->items[i]);
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}
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for (size_t i = 0; i < backend->devices->length; ++i) {
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wlr_input_device_destroy(backend->devices->items[i]);
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}
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list_free(backend->devices);
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list_free(backend->outputs);
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free(backend->seat_name);
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wl_event_source_remove(backend->remote_display_src);
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wlr_egl_free(&backend->egl);
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if (backend->seat) wl_seat_destroy(backend->seat);
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if (backend->shm) wl_shm_destroy(backend->shm);
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if (backend->shell) zxdg_shell_v6_destroy(backend->shell);
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if (backend->compositor) wl_compositor_destroy(backend->compositor);
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if (backend->registry) wl_registry_destroy(backend->registry);
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if (backend->remote_display) wl_display_disconnect(backend->remote_display);
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free(backend);
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}
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static struct wlr_egl *wlr_wl_backend_get_egl(struct wlr_backend *_backend) {
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struct wlr_wl_backend *backend = (struct wlr_wl_backend *)_backend;
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return &backend->egl;
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}
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static struct wlr_backend_impl backend_impl = {
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.start = wlr_wl_backend_start,
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.destroy = wlr_wl_backend_destroy,
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.get_egl = wlr_wl_backend_get_egl
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};
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bool wlr_backend_is_wl(struct wlr_backend *b) {
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return b->impl == &backend_impl;
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}
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struct wlr_wl_backend_output *wlr_wl_output_for_surface(
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struct wlr_wl_backend *backend, struct wl_surface *surface) {
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for (size_t i = 0; i < backend->outputs->length; ++i) {
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struct wlr_wl_backend_output *output = backend->outputs->items[i];
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if (output->surface == surface) {
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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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struct wlr_backend *wlr_wl_backend_create(struct wl_display *display) {
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wlr_log(L_INFO, "Creating wayland backend");
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struct wlr_wl_backend *backend = calloc(1, sizeof(struct wlr_wl_backend));
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if (!backend) {
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wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
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return NULL;
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}
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wlr_backend_init(&backend->backend, &backend_impl);
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if (!(backend->devices = list_create())) {
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wlr_log(L_ERROR, "Could not allocate devices list");
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goto error;
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}
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if (!(backend->outputs = list_create())) {
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wlr_log(L_ERROR, "Could not allocate outputs list");
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goto error;
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}
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backend->local_display = display;
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backend->remote_display = wl_display_connect(NULL);
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if (!backend->remote_display) {
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wlr_log_errno(L_ERROR, "Could not connect to remote display");
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return false;
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}
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if (!(backend->registry = wl_display_get_registry(backend->remote_display))) {
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wlr_log_errno(L_ERROR, "Could not obtain reference to remote registry");
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return false;
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}
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wlr_wl_registry_poll(backend);
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if (!(backend->compositor) || (!(backend->shell))) {
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wlr_log_errno(L_ERROR, "Could not obtain retrieve required globals");
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return false;
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}
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wlr_egl_init(&backend->egl, EGL_PLATFORM_WAYLAND_EXT, backend->remote_display);
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wlr_egl_bind_display(&backend->egl, backend->local_display);
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return &backend->backend;
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error:
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if (backend) {
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list_free(backend->devices);
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list_free(backend->outputs);
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}
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free(backend);
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return NULL;
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}
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