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#include <assert.h>
#include <string.h>
#include <wayland-server-protocol.h>
#include <wlr/interfaces/wlr_buffer.h>
#include <wlr/util/log.h>
#include "types/wlr_buffer.h"
/* struct wlr_buffer_resource_interface */
static struct wl_array buffer_resource_interfaces = {0};
void wlr_buffer_register_resource_interface(
const struct wlr_buffer_resource_interface *iface) {
assert(iface);
assert(iface->is_instance);
assert(iface->from_resource);
const struct wlr_buffer_resource_interface **iface_ptr;
wl_array_for_each(iface_ptr, &buffer_resource_interfaces) {
if (*iface_ptr == iface) {
wlr_log(WLR_DEBUG, "wlr_resource_buffer_interface %s has already"
"been registered", iface->name);
return;
}
}
iface_ptr = wl_array_add(&buffer_resource_interfaces, sizeof(iface));
*iface_ptr = iface;
}
static const struct wlr_buffer_resource_interface *get_buffer_resource_iface(
struct wl_resource *resource) {
struct wlr_buffer_resource_interface **iface_ptr;
wl_array_for_each(iface_ptr, &buffer_resource_interfaces) {
if ((*iface_ptr)->is_instance(resource)) {
return *iface_ptr;
}
}
return NULL;
}
struct wlr_buffer *wlr_buffer_try_from_resource(struct wl_resource *resource) {
if (strcmp(wl_resource_get_class(resource), wl_buffer_interface.name) != 0) {
return NULL;
}
const struct wlr_buffer_resource_interface *iface =
get_buffer_resource_iface(resource);
if (!iface) {
wlr_log(WLR_ERROR, "Unknown buffer type");
return NULL;
}
struct wlr_buffer *buffer = iface->from_resource(resource);
if (!buffer) {
wlr_log(WLR_ERROR, "Failed to create %s buffer", iface->name);
return NULL;
}
return wlr_buffer_lock(buffer);
}
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