How to shift color bits in fbdev?
madman2003 at gmail.com
Sat Mar 14 17:05:04 PDT 2009
Several things i see.
1: you are throwing away bits in the colors
2: you should undo the mangling in the read function (the system
doesn't understand your strange layout)
3: the alpha channel is in the upper 8 bits on little endian systems
(typically) for A8R8G8B
4: read/write are used by more pixmaps than just the ones going to
your videocard, you need to check if devPrivate.ptr lies in your
fontbuffer range or you need to make a list (6 entries will be more
than enough) in wrap and check in read/write to be sure (this is
because pixman (sw rendering library) is shared between the xserver
5: you only support A/XRGB pixmaps (no 8 or 16 bits formats)?
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