[cairo] Quartz filters don't recognize images in PDFs created by cairo
var at s200688799.onlinehome.us
Mon Mar 23 17:24:45 PDT 2015
I maintain a program that, among other things, convert colors in PDF
files using Quartz filters on Mac.
Recently, a customer reported a problem a sent me a PDF file created
from GIMP using cairo.
After running some tests, I found out that Quartz filters don't seem to
recognize images in such PDFs.
For example, if there's a Quartz filter that's supposed to convert RGB
elements to CMYK, it won't change images in this PDF. It will convert
other elements such as vector objects and fonts.
I never experienced this issue with PDFs created from other popular
software such as Adobe products, QuarkXPress and Microsoft Office.
Quartz filters convert images in PDFs from those programs as expected.
Now, I don't think that cairo library does something wrong - my guess is
that Quartz filters don't support the way cairo stores images in PDF.
On the other hand, evidently, Quartz filters don't have any problems
with PDFs created from other popular software titles.
So I have two questions:
-Is there a way to make Quartz filters work with images in cairo-created
-And if not, would cairo developers consider storing images in PDFs in a
way that let Quartz filters work with them?
Thanks for any info,
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