Adam Jackson wrote:
On Wed, 2010-09-08 at 17:18 +0800, Cui, Hunk wrote:
Hi, all,
Ask one question...
In
http://cgit.freedesktop.org/xorg/driver/xf86-video-geode/tree/src/gx_dri
ver.c#n1560, this is the function " GeodeCalculatePitchBytes", in the
process of calculate the pitch, why does the compression require a power
of 2, what is the purpose?
Framebuffer compression is a hardware feature. If the hardware requires
a power-of-two pitch...
- ajax
Which indeed it does. The compression algorithm and requirements are discussed
in
reasonable detail in the datasheet.
Jordan
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