[cairo] bug with SATURATE + pdf + push_group ?

[Arjen Nienhuis]

Hi,

Ghostscript doesn't show the 'strange seams' and I'm quite sure Acrobat
won't either.

It's not really a cairo PDF bug. If you draw 'rectangles next to each other'
in Illustrator and save it as PDF you will also get seams in some PDF
viewers.

Groeten, Arjen

On Mon, Jun 14, 2010 at 9:59 PM, Adam Goode <adam at spicenitz.org> wrote:

> Hi,
>
> I encountered what I think is a bug with cairo when drawing with
> push_group/pop_group, OPERATOR_SATURATE, rotated, to a PDF surface. I am
> drawing rectangles next to each other.
>
> On cairo 1.8.10 (Fedora 13) I get strange seams unless I clip and CLEAR
> within the group. cairo 1.2.4 (RHEL 5) has no such problems.
>
> I am including a python test program. Output from both programs are here:
>
> http://openslide.cs.cmu.edu/download/tmp/out-cairo-1.2.4.pdf
> http://openslide.cs.cmu.edu/download/tmp/out-cairo-1.8.10.pdf
>
>
> Thanks,
>
> Adam
>
>
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