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https://issues.apache.org/jira/browse/PDFBOX-2984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14903402#comment-14903402
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dariusz dusberger edited comment on PDFBOX-2984 at 9/22/15 8:46 PM:
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Updated PDFStreamEngine.java which contains a workaround/fix for the problem.
Uses Math.abs( ... ) when using getXScale/getYScale in the calculation.
was (Author: dtd0):
Updated PDFStreamEngine.java which contains a workaround/fix for the problem.
use Math.abs( ... ) when using getXScale/getYScale in the calculation.
> PDFTextStripper adds extra word/line delimiters when PDF page orientation is
> 180 degrees
> ----------------------------------------------------------------------------------------
>
> Key: PDFBOX-2984
> URL: https://issues.apache.org/jira/browse/PDFBOX-2984
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.8.10
> Environment: Windows/Linux, JDK 1.7
> Reporter: dariusz dusberger
> Attachments: 1760_001.pdf, PDFStreamEngine.java
>
>
> The PDFTextStripper adds word delimiters between each character and new-line
> after each word when page orientation is 180 degrees.
> This happens because the PDFStreamEngine uses the raw scaling factor
> Matrix.getXScale() from the transformation Matrix to scale width/font-size
> which are used to calculate spacing between characters.
> =========================================================
> Output of the PDFTextStripper.getText(pdDoc);
> T h i s i s
> a t e s t 1 ! ! !
> T h i s
> i s
> a t e s t
> 2
> ! ! !
> T h i s i s
> a
> t e s t 3
> ! ! !
> T h i s i s
> a t e s t 4 ! ! !
> =========================================================
> Example: The following will result in negative spaceWidthDisp / font-size in
> PDFTextStripper
> 180 degrees = [-1, 0, 0; 0, -1, 0, w, h, 1]; therefore the
> textMatrix.getXScale() == -1
> float spaceWidthDisp = spaceWidthText * fontSizeText * horizontalScalingText
> * textMatrix.getXScale() * ctm.getXScale()
> fontSizeText * textMatrix.getXScale()
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