[Mesa-dev] [PATCH 1/2] dri_interface: Introduce __DRI_IMAGE_USE_SCANOUT_ROTATION_* flags (v2)

[Vivek Kasireddy]

These flags can be used by the DRI driver to set additional requirements
such as tiling while creating buffers.

v2: Added a brief comment to explain the rotation orientation.

Cc: Michel Danzer <michel at daenzer.net>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy at intel.com>
---
 include/GL/internal/dri_interface.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
index 6bbd3fa..c72c365 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -1101,6 +1101,15 @@ struct __DRIdri2ExtensionRec {
 #define __DRI_IMAGE_USE_CURSOR		0x0004 /* Depricated */
 #define __DRI_IMAGE_USE_LINEAR		0x0008
 
+/**
+ * Setting a rotation angle of 90 or 270 would result in the scanout
+ * buffer being rotated in a clounter clockwise manner. This is the
+ * expected behavior for ensuring XRandR compliance.
+ */
+#define __DRI_IMAGE_USE_SCANOUT_ROTATION_90	0x0010
+#define __DRI_IMAGE_USE_SCANOUT_ROTATION_180	0x0020
+#define __DRI_IMAGE_USE_SCANOUT_ROTATION_270	0x0040
+
 
 /**
  * Four CC formats that matches with WL_DRM_FORMAT_* from wayland_drm.h,
-- 
2.4.3