Only allow one modifier per DMA-BUF, split attributes struct in render/

include/wlr/render/dmabuf.h

@@ -0,0 +1,29 @@
+#ifndef WLR_RENDER_DMABUF_H
+#define WLR_RENDER_DMABUF_H
+
+// So we don't have to pull in linux specific drm headers
+#ifndef DRM_FORMAT_MOD_INVALID
+#define DRM_FORMAT_MOD_INVALID ((1ULL<<56) - 1)
+#endif
+
+#define WLR_DMABUF_MAX_PLANES 4
+
+enum wlr_dmabuf_attributes_flags {
+	WLR_DMABUF_ATTRIBUTES_FLAGS_Y_INVERT = 1,
+	WLR_DMABUF_ATTRIBUTES_FLAGS_INTERLACED = 2,
+	WLR_DMABUF_ATTRIBUTES_FLAGS_BOTTOM_FIRST = 4,
+};
+
+struct wlr_dmabuf_attributes {
+	int32_t width, height;
+	uint32_t format;
+	uint32_t flags; // enum wlr_dmabuf_attributes_flags
+	uint64_t modifier;
+
+	int n_planes;
+	uint32_t offset[WLR_DMABUF_MAX_PLANES];
+	uint32_t stride[WLR_DMABUF_MAX_PLANES];
+	int fd[WLR_DMABUF_MAX_PLANES];
+};
+
+#endif