> > To me, an XImage layout would just be another format in the list... Usually
> > only on the �To� side. The number is limited anyway: 555packed, 565packe,
> > rgb24 and rgb32, that�s about (and the latter two are already standard :))
>
> For these formats "to" is useful for X display, and "from" is useful for
> V4L and AVI. You're right that's the way it's implemented - as a bunch
> of individual converters that cover the common XImage formats, but the
> point is that the app can just do a dumb "descriptor.format = PackedRGB,
> descriptor.r/g/b masks = XImage.r/g/b masks", then ask for a converter
> to/from that format.
... and xawtv has some functions which use lookup tables as default
catch. These lookup tables are initialized at startup with approximate
values for the X-Servers ximage format. This way everything works fine
even if the ximage format is _not_ one of the common ones (rgb555 on a
byteswapped display, rgb with 10 bit color dept, ...).
Gerd
--
Gerd Knorr <[EMAIL PROTECTED]> -- SuSE Labs, Au�enstelle Berlin
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