PorterDuff mode control are used to determine
how two images are combined.
Signed-off-by: Jacob Chen <jacob-chen@xxxxxxxxxx>
---
Documentation/media/uapi/v4l/extended-controls.rst | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/Documentation/media/uapi/v4l/extended-controls.rst b/Documentation/media/uapi/v4l/extended-controls.rst
index abb1057..f9c93bb 100644
--- a/Documentation/media/uapi/v4l/extended-controls.rst
+++ b/Documentation/media/uapi/v4l/extended-controls.rst
@@ -3021,6 +3021,10 @@ Image Process Control IDs
The video deinterlacing mode (such as Bob, Weave, ...). The menu items are
driver specific and are documented in :ref:`v4l-drivers`.
+``V4L2_CID_PORTER_DUFF_MODE (menu)``
+ The PorterDuff blend modes. PorterDuff is way to overlay, combine and
+ trim images as if they were pieces of cardboard, device could use to
+ determine how two images are combined.
.. _dv-controls:
--
2.7.4
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