144 lines
3.9 KiB
C
144 lines
3.9 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/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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static int dispatch_events(int fd, uint32_t mask, void *data) {
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struct wlr_backend_state *state = 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(state->remote_display);
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}
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if (mask & WL_EVENT_WRITABLE) {
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count = wl_display_flush(state->remote_display);
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}
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if (mask == 0) {
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count = wl_display_dispatch_pending(state->remote_display);
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wl_display_flush(state->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_init(struct wlr_backend_state* state) {
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wlr_log(L_INFO, "Initializating wayland backend");
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state->remote_display = wl_display_connect(NULL);
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if (!state->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 (!(state->registry = wl_display_get_registry(state->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(state);
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if (!(state->compositor) || (!(state->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(&state->egl, EGL_PLATFORM_WAYLAND_EXT, state->remote_display);
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for (size_t i = 0; i < state->requested_outputs; ++i) {
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wlr_wl_output_create(state->backend);
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}
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struct wl_event_loop *loop = wl_display_get_event_loop(state->local_display);
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int fd = wl_display_get_fd(state->remote_display);
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int events = WL_EVENT_READABLE | WL_EVENT_ERROR |
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WL_EVENT_HANGUP | WL_EVENT_WRITABLE;
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state->remote_display_src = wl_event_loop_add_fd(loop, fd, events,
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dispatch_events, state);
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wl_event_source_check(state->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_state *state) {
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if (!state) {
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return;
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}
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for (size_t i = 0; i < state->outputs->length; ++i) {
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wlr_output_destroy(state->outputs->items[i]);
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}
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for (size_t i = 0; state->devices && i < state->devices->length; ++i) {
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wlr_input_device_destroy(state->devices->items[i]);
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}
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list_free(state->devices);
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wlr_egl_free(&state->egl);
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free(state->outputs);
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if (state->seat) wl_seat_destroy(state->seat);
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if (state->shm) wl_shm_destroy(state->shm);
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if (state->shell) wl_shell_destroy(state->shell);
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if (state->compositor) wl_compositor_destroy(state->compositor);
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if (state->registry) wl_registry_destroy(state->registry);
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if (state->remote_display) wl_display_disconnect(state->remote_display);
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free(state);
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}
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static struct wlr_backend_impl backend_impl = {
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.init = wlr_wl_backend_init,
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.destroy = wlr_wl_backend_destroy
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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_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_backend_state *state = calloc(1, sizeof(struct wlr_backend_state));
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if (!state) {
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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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struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
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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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if (!(state->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 (!(state->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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state->local_display = display;
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state->backend = backend;
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return backend;
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error:
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if (state) {
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free(state->outputs);
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free(state->devices);
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free(state->devices);
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}
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free(state);
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free(backend);
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return NULL;
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}
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