export-dmabuf: permanently fail if backend doesn't implement export_dmabuf
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
+#include <wlr/interfaces/wlr_output.h>
#include <wlr/types/wlr_export_dmabuf_v1.h>
#include <wlr/types/wlr_linux_dmabuf.h>
#include <wlr/types/wlr_output.h>
@@ -90,6 +91,12 @@ static void manager_handle_capture_output(struct wl_client *client,
wl_list_insert(&manager->frames, &frame->link);
+ if (!output->impl->export_dmabuf) {
+ zwlr_export_dmabuf_frame_v1_send_cancel(frame->resource,
+ ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERNAMENT);
+ return;
+ }
+
struct wlr_dmabuf_buffer_attribs *attribs = &frame->attribs;
if (!wlr_output_export_dmabuf(output, attribs)) {
zwlr_export_dmabuf_frame_v1_send_cancel(frame->resource,
