Thought some of my observations might be useful to this discussion.
I have been using Inkscape and also rsvg-convert in an attempt to
convert a few thousand SVGs to PDF.
When I open certain PDFs in Illustrator I get this message:
"An unknown shading type was encountered" and the offending shapes are
un-editable "images" with a clipping mask over them.
There are two circumstances that result in problems for me.
1) A gradient with only 2 stops.
In the following example I have duplicated the offset="0" stop which
fixes things and means that if I convert the SVG to PDF the resulting
shape is filled with this gradient and works fine. Without the duplicate
declaration, the gradient is converted to an un-editable image with a
clipping mask.
Code: Select all
<linearGradient id="ian_symbols_b8a58aafc1f12e74492e9e865b7f569b"
gradientUnits="userSpaceOnUse" x1="113.7275" y1="136.9414" x2="197.0259"
y2="136.9414">
<stop offset="0" style="stop-color:#927A62" id="stop1472" />
<stop offset="0" style="stop-color:#927A62" id="stop1472_dup" />
<stop offset="1" style="stop-color:#93866F" id="stop1474" />
</linearGradient>
2) A shape that has an opacity that is less than "1". I don't know how to fix
this one and still maintain the look of the original. I understand that there
are some issues with transparency and the PDF format, but obviously the full AI
version of the PDF format these days supports transparency.
So, could inkscape/rsvg-convert/cairo handle these conversions better,
or is there something I can do with the original SVG code to make the
opacity work ok in the final PDF?
Thanks
--
Exporting patterns and gradients doesn't work for PDF / EMF
https://bugs.launchpad.net/bugs/168610
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