[cairo-bugs] [Bug 33711] Alpha Value Normalization from 255 to 128

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Jan 30 20:57:44 PST 2011


--- Comment #3 from ssseintr <ssseintr at gmail.com> 2011-01-30 20:57:41 PST ---
Dear Bill Spitzak,

Thanks for your comment.

Actually my problem is,

my hardware has only 128 level of transparency. 

 (i.e) 0,1,2,3....,128

0 means full transparent 64 means semi transparent & 128 means opaque.

but cairo assumes & produces final image with 256 level of transparency.

  (i.e) 0,1,2,3,....,255.

I need to change the code in cairo, so which can produce the final image with
only 128 level of transparency.

Is it possible in cairo to change level of transparency from 256 to 128 or I
have to change in pixman..?

Expecting your reply.

Thanks & Regards,

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