[FFmpeg-devel] [PATCH] swscale alpha channel support
Tue Mar 24 10:24:40 CET 2009
2009/3/24 C?dric Schieli <cschieli at gmail.com>:
> 2009/3/24 Michael Niedermayer <michaelni at gmx.at>:
>> On Mon, Mar 23, 2009 at 03:53:28PM +0100, C?dric Schieli wrote:
>>> Hi all,
>>> #4 : palette8topacked32.patch
>>> use default value of 255 for the alpha channel in unscaled paletted to
>>> rgb32 converters
>> a very quick looks gives me the feeling this is wrong?
>> isnt the alpha supposed to be in the palette already?
> true for PAL8, but not for BGR8/RGB8/BGR4_BYTE/RGB4_BYTE
> so a separate code path seems needed for PAL8 (what is the index for
> the alpha color in PAL8 ?)
Ok, it's better to read the code before replying.
Attached is a new patch that use the alpha stored in the PAL8 palette,
and default to 255 for the BGR8/RGB8/BGR4_BYTE/RGB4_BYTE case.
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