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| author | Sylwester Nawrocki | 2011-11-14 12:48:18 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2011-12-30 17:05:08 +0100 |
| commit | cc1d327232759647ea56725eab1c6b16c92d52fa (patch) | |
| tree | c929516390d3aade90f4a87f29ceaa05be47aa6a /Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml | |
| parent | Merge tag 'v3.2-rc7' into staging/for_v3.3 (diff) | |
| download | kernel-qcow2-linux-cc1d327232759647ea56725eab1c6b16c92d52fa.tar.gz kernel-qcow2-linux-cc1d327232759647ea56725eab1c6b16c92d52fa.tar.xz kernel-qcow2-linux-cc1d327232759647ea56725eab1c6b16c92d52fa.zip | |
[media] v4l: Add new alpha component control
The V4L2_CID_ALPHA_COMPONENT control is intended for the video capture
or memory-to-memory devices that are capable of setting up the per-pixel
alpha component to some arbitrary value. It allows to set the alpha
component for all pixels to an arbitrary value.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml b/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml index ba56536622f2..166c8d65e4f7 100644 --- a/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml +++ b/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml @@ -428,8 +428,11 @@ colorspace <constant>V4L2_COLORSPACE_SRGB</constant>.</para> <para>Bit 7 is the most significant bit. The value of a = alpha bits is undefined when reading from the driver, ignored when writing to the driver, except when alpha blending has been negotiated for a -<link linkend="overlay">Video Overlay</link> or <link -linkend="osd">Video Output Overlay</link>.</para> +<link linkend="overlay">Video Overlay</link> or <link linkend="osd"> +Video Output Overlay</link> or when alpha component has been configured +for a <link linkend="capture">Video Capture</link> by means of <link +linkend="v4l2-alpha-component"> <constant>V4L2_CID_ALPHA_COMPONENT +</constant> </link> control.</para> <example> <title><constant>V4L2_PIX_FMT_BGR24</constant> 4 × 4 pixel |