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bug#19373: 24.4; SVG images rendered via librsvg fail at displaying non-

From: Ulf Jasper
Subject: bug#19373: 24.4; SVG images rendered via librsvg fail at displaying non-inline bitmap images
Date: Tue, 16 Dec 2014 19:28:57 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Vasilij Schneidermann <hurrus.durrus@gmail.com> writes:

> I've recently tested Emacs' support for displaying SVG images that
> contain bitmap images.  The test files used were
> <http://dev.w3.org/SVG/profiles/1.1F2/test/svg/struct-image-04-t.svg>
> and
> <http://dev.w3.org/SVG/profiles/1.1F2/test/svg/struct-image-02-b.svg>.
> The imagemagick backend displays both pictures flawlessly, but renders
> transparency as white background which makes it unsuitable for my
> purposes.  The librsvg backend appears to render transparency correctly,
> however in the first example with inline bitmaps the first image isn't
> displayed at all (which can be easily fixed by replacing "jpg" with
> "jpeg" in its sources); in the second example the non-inline bitmap
> isn't displayed either.  I've tried tracking down the reason for this
> behavior and the only pointer I could find was that librsvg is using
> the cairo library to embed the bitmap image.  Is there any obvious fix I
> can apply to remedy this issue?

rsvg-view (called rsvg-view-3 on debian), which is librsvg's standalone
svg-viewer, shows the same behaviour:

 - the referenced image in struct-image-02-b.svg is not shown
 - the embedded=inlined jpg image in struct-image-04-t.svg is not shown

So this looks like an librsvg issue and probably is not related to
Emacs.  Maybe you could ask on the librsvg mailing list about this?


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