render: introduce wlr_gbm_allocator

include/render/gbm_allocator.h

@@ -0,0 +1,29 @@
+#ifndef RENDER_GBM_ALLOCATOR_H
+#define RENDER_GBM_ALLOCATOR_H
+
+#include <gbm.h>
+#include <wlr/types/wlr_buffer.h>
+#include "render/allocator.h"
+
+struct wlr_gbm_buffer {
+	struct wlr_buffer base;
+
+	struct gbm_bo *gbm_bo;
+	struct wlr_dmabuf_attributes dmabuf;
+};
+
+struct wlr_gbm_allocator {
+	struct wlr_allocator base;
+
+	int fd;
+	struct gbm_device *gbm_device;
+};
+
+/**
+ * Creates a new GBM allocator from a render FD.
+ *
+ * Takes ownership over the FD.
+ */
+struct wlr_gbm_allocator *wlr_gbm_allocator_create(int render_fd);
+
+#endif