dmabuf: Add Vulkan formats to the large table

This is done without testing, just doing my best to map all the DRM
formats to VkFormats.

Once people start using them, they'll figure it out when it's wrong.
(Somebody needs to write a testsuite.)

gdk/gdkdmabufprivate.h

@@ -2,6 +2,10 @@
 
 #include "gdkdmabufformatsbuilderprivate.h"
 
+#ifdef GDK_RENDERING_VULKAN
+#include <vulkan/vulkan.h>
+#endif
+
 #define GDK_DMABUF_MAX_PLANES 4
 
 typedef struct _GdkDmabuf GdkDmabuf;
@@ -70,5 +74,9 @@ gboolean                    gdk_dmabuf_fourcc_is_yuv            (guint32
 gboolean                    gdk_dmabuf_get_memory_format        (guint32                         fourcc,
                                                                  gboolean                        premultiplied,
                                                                  GdkMemoryFormat                *out_format);
+#ifdef GDK_RENDERING_VULKAN
+VkFormat                    gdk_dmabuf_get_vk_format            (guint32                         fourcc,
+                                                                 VkComponentMapping             *out_components);
+#endif
 
 #endif