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| author | Hans Verkuil <hverkuil@xs4all.nl> | 2007-06-04 09:55:36 +0200 |
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| committer | Hans Verkuil <hverkuil@xs4all.nl> | 2007-06-04 09:55:36 +0200 |
| commit | e36359f5879610745dfad30cc8d2a03554b82b74 (patch) | |
| tree | a062778b831499e5c5629201fe1115ac4b7d0730 /linux/drivers/media/video/cpia2/cpia2_v4l.c | |
| parent | 64ef6853d9cf35dbd0239ece3502f782056d7d6d (diff) | |
| download | mediapointer-dvb-s2-e36359f5879610745dfad30cc8d2a03554b82b74.tar.gz mediapointer-dvb-s2-e36359f5879610745dfad30cc8d2a03554b82b74.tar.bz2 | |
Add V4L2_FBUF_CAP/FLAG_LOCAL/GLOBAL_INV_ALPHA
From: Hans Verkuil <hverkuil@xs4all.nl>
Michael Schimek requested the addition of inverted alpha framebuffer
caps/flags to support such hardware.
'Normal' alpha uses this formula to mix the framebuffer and video:
output = fb pixel * fb alpha + video pixel * (1 - fb alpha)
and the 'inverted' alpha uses this formula:
output = fb pixel * (1 - fb alpha) + video pixel * fb alpha
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Diffstat (limited to 'linux/drivers/media/video/cpia2/cpia2_v4l.c')
0 files changed, 0 insertions, 0 deletions