[cairo] Getting wrong cairo pixel color.

[Monil Parmar]

Hi,

Iam using cairo in my application to set and get the color.
Values which Iam getting for particular pixel is not exactly same which we
are setting, it is nearabout of that value.
I made a sample in which, For example if we are setting the (r=10, b=20,
g=30, a=40) to the pixel,  when I tried to get the color value from that
pixel.
Iam getting following values in return (r=6, b=19, g=26, a=40).
I tried few other ways (sample is attached) but result is same.
Issue seems to be due to division / multiplication / conversion between
Double -> int -> store in int value.
I Found a open source link where it states that, The result comes due to the
different conversions of
color for it's representation:  double -> 4 uint16 (cairo) -> 1 uint32
(pixman)
following is the link:
http://lists.cairographics.org/archives/cairo/2010-December/021295.html
Is any one having any update on this issue. Or there is any other way to get
the exact value of color.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.cairographics.org/archives/cairo/attachments/20110328/ab35c854/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cairo-pixel.c
Type: text/x-csrc
Size: 3081 bytes
Desc: not available
URL: <http://lists.cairographics.org/archives/cairo/attachments/20110328/ab35c854/attachment.c>