[poppler] Bugfix proposal for Shading Type 6 and 7

[Albert Astals Cid]

A Dissabte, 3 de juliol de 2010, Christian Feuersaenger va escriure:
> Hello Albert,

Hi

> 
> I've managed to fix a bug in the Shading Type 6/7 (Coons & cubic tensor
> patches) implementation.
> 
> The bugfix is small and stable (in my eyes); the poppler-0.14 branch
> doesn't implement support for parameterized patch shadings. I modified
> the existing implementation accordingly with relatively few changes.
> 
> Attached you find the patch file and the updated test.pdf to see the
> improvement.
> 
> The file type4567patch.... also includes the patch of my previous mail
> (they only share the same refinement threshold).
> 
> The patch should work relative to poppler-0.14.0-3-gb2427d0 .

This patch causes a regression in the attached pdf (the blue area disappears)

Albert

> 
> Best regards
> 
> Christian
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