> I would preffer the read images to be always in 8bpp
RGBA format without
> doing manual conversion, so I can rely on the pixel
data being in a
> fixed format after reading is done.
> I've looked through the manual and noticed the
PNG_TRANSFORM_* flags for
> png_read_png, however it's not clear to me which of
those I need to get
> the described effect. Also, I'm not sure if I can just
set a fixed
> combination or have to set the flags depending on the
image format.
In general, that requires quantization, so you're on your
own--libpng
doesn't support it. (It doesn't support plain 24->8
quantization of
opaque images, either.)
pngquant and pngnq (standalone tools) do that, but I'm not
aware of any
library that does. (Maybe imlib or something.)
Greg
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