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https://issues.apache.org/jira/browse/FOP-2846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16774055#comment-16774055
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Jan Tošovský commented on FOP-2846:
-----------------------------------
SVG syntax cannot be translated to PDF syntax 1:1. Some vector effects are thus
rasterized. For example drop shadows (filters in general), masked or clipped
objects etc.
Your icon size is 64px, which needs even higher DPI values.
But if you can use simpler SVG consisting of simple shapes, I believe it will
be translated to PDF without rasterizing.
> SVG not handled / rendered / embedded properly
> ----------------------------------------------
>
> Key: FOP-2846
> URL: https://issues.apache.org/jira/browse/FOP-2846
> Project: FOP
> Issue Type: Bug
> Affects Versions: 2.3
> Reporter: Björn Kautler
> Priority: Major
> Attachments: image-2019-02-21-12-15-39-802.png,
> image-2019-02-21-12-17-26-206.png, image-2019-02-21-13-35-21-628.png,
> med-folder-journal.svg, roadsign-attention.svg, svg-test.fo, svg-test.pdf
>
>
> It seems FOP does not handle all SVGs properly.
> The attached [^svg-test.fo] which displays the attached files
> [^roadsign-attention.svg] and [^med-folder-journal.svg] demonstrate the
> problem.
> The result of {{fop-2.3/fop/fop svg-test.fo svg-test.pdf}} can be seen in
> [^svg-test.pdf], especially if you zoom in.
> The {{med-folder-journal.svg}} is properly displayed and scaled, the
> {{roadsign-attention.svg}} looks like the triangle is rendered to pixels that
> scale up, but the exclamation mark properly scales.
> Here the PDF content as screenshot on 1200%:
> !image-2019-02-21-12-15-39-802.png!
> Using the code at [https://xmlgraphics.apache.org/batik/using/swing.html]
> shows that Batik 1.10 can perfectly fine scale up the SVG:
> !image-2019-02-21-12-17-26-206.png!
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