[cairo] cairo built against libpng16

[Chris Wilson]

On Sat, Mar 30, 2013 at 09:22:16AM +0100, Ingmar Runge wrote:
> Hey everyone, here's a possible patch. It's the least invasive patch I
> could think of.

The advice from the png authors is that set_read_transform_info is even
more dangerous than set_read_transform_fn.

"The git head of libpng16 (and libpng17) has a fix that should allow user
transforms (but not png_set_user_transform_info) to be called after
png_read_update_info." - John Bowler

Hopefully landing in libpng-1.6.2 soon.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre