On Sat, 2011-02-26 at 11:51 +0100, Régis Fénéon wrote:
> Hello,
>
> I use fop to convert docbook documents to pdf. I have some issues when a
> document includes a svg image that contains a transparent color gradient:
> - the colors of the image and the other parts of the page are wrong, it
> looks like a different color space is used,
> - this problem occurs not only on the page that contains the image, but
> several pages before and after the image,
> - the rest of the document has the correct colors.
> The problem disappears if I modify the svg image to use an fully opaque
> gradient.
>
> Versions: FOP 1.0, JRE 1.6.0_20, Windows 7 64-bit
I had a similar problem with PNGs, JPGs, and some SVGs when viewing
files using Acroread on Linux and to a lesser extent with Acroread on
Windows XP (Evince got the colors correct). By default, PDF uses
DeviceCMYK when you probably want DeviceRGB for compositing a page with
an SVG. I wrote a little script that goes through the PDF file and adds:
/Group << /S /Transparency /I true /CS /DeviceRGB>>
after each /Page (I found this workaround on the bmeps web site). I then
ran the PDF file through pdftk to fix the references. This fixed the
problem for me. Check the fop-users archives for September 2009 for more
details.
Tav
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