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https://issues.apache.org/jira/browse/PDFBOX-585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876324#action_12876324
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Pepijn Schmitz commented on PDFBOX-585:
---------------------------------------
The second link doesn't work anymore, but having hunted down the source for
Invoke I must unfortunately admit I don't understand enough of it to fix
PrintImageLocations myself.
However, using a debugger I determined that in this bit of code from
PrintImageLocations:
Matrix unrotatedCTM = ctm.multiply( rotationInverseMatrix );
float xScale = unrotatedCTM.getXScale();
float yScale = unrotatedCTM.getYScale();
System.out.println( "Found image[" + objectName.getName() +
"] " +
"at " + unrotatedCTM.getXPosition() + "," +
unrotatedCTM.getYPosition() +
" size=" + (xScale/100f*image.getWidth()) + "," +
(yScale/100f*image.getHeight() ));
...the values of xScale and yScale appear to be the width and height of the
image in PDF units (or points). I don't know in which units PrintImageLocations
is trying to show the size (an unfortunate flaw in most of the PDFBox
documentation), but dividing by 100 and multiplying by the image dimensions
seems neither here nor there. Dividing by 72 would get you the size in inches,
multiplying that by 25.4 would result in the size in mm.
Is my understanding correct?
> PrintImageLocations example calculates wrong image width/height
> ---------------------------------------------------------------
>
> Key: PDFBOX-585
> URL: https://issues.apache.org/jira/browse/PDFBOX-585
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing, PDModel, Utilities
> Affects Versions: 0.8.0-incubator
> Reporter: Andreas Lehmkühler
> Assignee: Andreas Lehmkühler
>
> As described in [1] the code for calculating the image position and
> width/height should be updated similar to the code in [2].
> [1] http://markmail.org/thread/hzti74yt45vz326r
> [2]
> http://svn.apache.org/repos/asf/pdfbox/trunk/src/main/java/org/apache/pdfbox/util/operator/pagedrawer/Invoke.java
>
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