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#include <stdbool.h>
#include <stdlib.h>
#include <wlr/backend/interface.h>
#include <wlr/backend/udev.h>
#include <wlr/backend/session.h>
#include <wlr/util/log.h>
#include "backend/multi.h"
struct subbackend_state {
struct wlr_backend *backend;
struct wlr_backend *container;
struct wl_listener input_add;
struct wl_listener input_remove;
struct wl_listener output_add;
struct wl_listener output_remove;
};
static bool multi_backend_init(struct wlr_backend_state *state) {
for (size_t i = 0; i < state->backends->length; ++i) {
struct subbackend_state *sub = state->backends->items[i];
if (!wlr_backend_init(sub->backend)) {
wlr_log(L_ERROR, "Failed to initialize backend %zd", i);
return false;
}
}
return true;
}
static void multi_backend_destroy(struct wlr_backend_state *state) {
for (size_t i = 0; i < state->backends->length; ++i) {
struct subbackend_state *sub = state->backends->items[i];
wlr_backend_destroy(sub->backend);
free(sub);
}
list_free(state->backends);
wlr_session_finish(state->session);
wlr_udev_destroy(state->udev);
free(state);
}
static struct wlr_egl *multi_backend_get_egl(struct wlr_backend_state *state) {
for (size_t i = 0; i < state->backends->length; ++i) {
struct subbackend_state *sub = state->backends->items[i];
struct wlr_egl *egl = wlr_backend_get_egl(sub->backend);
if (egl) {
return egl;
}
}
return NULL;
}
struct wlr_backend_impl backend_impl = {
.init = multi_backend_init,
.destroy = multi_backend_destroy,
.get_egl = multi_backend_get_egl
};
struct wlr_backend *wlr_multi_backend_create(struct wlr_session *session,
struct wlr_udev *udev) {
struct wlr_backend_state *state =
calloc(1, sizeof(struct wlr_backend_state));
if (!state) {
wlr_log(L_ERROR, "Backend allocation failed");
return NULL;
}
state->backends = list_create();
if (!state->backends) {
free(state);
wlr_log(L_ERROR, "Backend allocation failed");
return NULL;
}
struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
state->backend = backend;
state->session = session;
state->udev = udev;
return backend;
}
bool wlr_backend_is_multi(struct wlr_backend *b) {
return b->impl == &backend_impl;
}
static void input_add_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, input_add);
wl_signal_emit(&state->container->events.input_add, data);
}
static void input_remove_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, input_remove);
wl_signal_emit(&state->container->events.input_remove, data);
}
static void output_add_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, output_add);
wl_signal_emit(&state->container->events.output_add, data);
}
static void output_remove_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, output_remove);
wl_signal_emit(&state->container->events.output_remove, data);
}
void wlr_multi_backend_add(struct wlr_backend *multi,
struct wlr_backend *backend) {
struct subbackend_state *sub = calloc(1, sizeof(struct subbackend_state));
sub->backend = backend;
sub->container = multi;
sub->input_add.notify = input_add_reemit;
sub->input_remove.notify = input_remove_reemit;
sub->output_add.notify = output_add_reemit;
sub->output_remove.notify = output_remove_reemit;
wl_list_init(&sub->input_add.link);
wl_list_init(&sub->input_remove.link);
wl_list_init(&sub->output_add.link);
wl_list_init(&sub->output_remove.link);
wl_signal_add(&backend->events.input_add, &sub->input_add);
wl_signal_add(&backend->events.input_remove, &sub->input_remove);
wl_signal_add(&backend->events.output_add, &sub->output_add);
wl_signal_add(&backend->events.output_remove, &sub->output_remove);
list_add(multi->state->backends, sub);
}
struct wlr_session *wlr_multi_get_session(struct wlr_backend *base) {
if (base->impl != &backend_impl)
return NULL;
struct wlr_backend_state *multi = base->state;
return multi->session;
}
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