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https://issues.apache.org/jira/browse/FOP-2535?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Seifeddine Dridi updated FOP-2535:
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Attachment: external_graphic_height_percentage.fo
> Scaling an image' height relatively to its parent-block' height
> ---------------------------------------------------------------
>
> Key: FOP-2535
> URL: https://issues.apache.org/jira/browse/FOP-2535
> Project: FOP
> Issue Type: Bug
> Components: fo/block
> Affects Versions: trunk
> Reporter: Seifeddine Dridi
> Attachments: external_graphic_height_percentage.fo
>
>
> I noticed that FOP does not support scaling an image' height using percentage.
> In the example below, we set the image' height to be 50% of its parent block
> (the expected height should be 2.5 cm; 5 cm * 0.5 = 2.5 cm). However, FOP
> sets the image' height exactly like its ancestor block (if we ignore
> alignment offset). As a matter of fact, the image' height is always resolved
> the same regardless of the value of attribute "height".
> {code}
> <fo:block-container position="absolute" height="5cm">
> <fo:block>
> <fo:external-graphic src="image.jpg" height="50%"
> content-height="scale-to-fit"/>
> </fo:block>
> </fo:block-container>
> {code}
> Judging from the latest revision of the source code, it seems that FOP
> resolves the image' height using the parent containing-block-area rather than
> the containing-reference-area. This subtle difference makes it impossible to
> scale an image relatively to its parent block-container.
> Any thoughts?
> Thanks
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