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V4L/DVB (5736): Add V4L2_FBUF_CAP/FLAG_LOCAL/GLOBAL_INV_ALPHA
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> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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@ -615,12 +615,16 @@ struct v4l2_framebuffer
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#define V4L2_FBUF_CAP_BITMAP_CLIPPING 0x0008
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#define V4L2_FBUF_CAP_LOCAL_ALPHA 0x0010
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#define V4L2_FBUF_CAP_GLOBAL_ALPHA 0x0020
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#define V4L2_FBUF_CAP_LOCAL_INV_ALPHA 0x0040
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#define V4L2_FBUF_CAP_GLOBAL_INV_ALPHA 0x0080
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/* Flags for the 'flags' field. */
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#define V4L2_FBUF_FLAG_PRIMARY 0x0001
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#define V4L2_FBUF_FLAG_OVERLAY 0x0002
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#define V4L2_FBUF_FLAG_CHROMAKEY 0x0004
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#define V4L2_FBUF_FLAG_LOCAL_ALPHA 0x0008
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#define V4L2_FBUF_FLAG_GLOBAL_ALPHA 0x0010
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#define V4L2_FBUF_FLAG_LOCAL_INV_ALPHA 0x0020
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#define V4L2_FBUF_FLAG_GLOBAL_INV_ALPHA 0x0040
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struct v4l2_clip
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{
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