[cairo] JPEG support patch

[Vladimir Vukicevic]

Bill Spitzak wrote:
> Actually DevIL is the library I was thinking of when I was trying to 
> make a proposal for a new cairo pattern t.
> 
> Perhaps Cairo can just require DevIL.

What purpose would there be to having Cairo require DevIL, rather than 
just having there be a middle layer shim library that can use DevIL to 
load data into cairo surfaces/cairo patterns?  There isn't anything 
preventing you from creating cairo_image_pattern_create() on top of 
existing public cairo APIs from another library.  I wouldn't call it 
cairo_ to avoid confusion, but something similar.

    - Vlad