Assert mandatory impl fields in wlr_output_init
@@ -191,6 +191,8 @@ void wlr_output_set_position(struct wlr_output *output, int32_t lx,
void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
const struct wlr_output_impl *impl) {
+ assert(impl->enable && impl->make_current && impl->swap_buffers &&
+ impl->transform);
output->backend = backend;
output->impl = impl;
wl_list_init(&output->modes);
