[jira] [Commented] (PDFBOX-2031) GrayScale images become inverted

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-2031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13970469#comment-13970469 ] 

Tilman Hausherr commented on PDFBOX-2031:
-----------------------------------------

Please test with the current snapshot (i.e. the unreleased version 1.8.5), get it here:
https://repository.apache.org/content/groups/snapshots/org/apache/pdfbox/pdfbox/1.8.5-SNAPSHOT/

Maybe what you found was PDFBOX-1998, see also attached file there.


> GrayScale images become inverted
> --------------------------------
>
>                 Key: PDFBOX-2031
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2031
>             Project: PDFBox
>          Issue Type: Bug
>          Components: PDModel
>    Affects Versions: 1.8.4
>         Environment: osx
>            Reporter: Elija B
>
> PDPixelMap.getRGBImage() inverts images. After debugging it appears that the inversion happens at the end, in applyMasks(image);
> Some more debugging info:
> bitsPerComponent == 1
> getImageMask() == true
> getColorSpace() == PDDeviceGray
> map == new byte[] {(byte)0xff} // used for IndexColorModel
> In imageMask(baseImage) this happens:
> graphics.setColor(Color.BLACK);
> graphics.fillRect(0, 0, baseImage.getWidth(), baseImage.getHeight());
>         // assume default values ([0,1]) for the DecodeArray
>         // TODO DecodeArray == [1,0]
>         graphics.setComposite(AlphaComposite.DstIn);
>         graphics.drawImage(baseImage, null, 0, 0);
>         graphics.dispose();
>         return stencilMask;
> I wish I could provide a sample file, but I have no sanitized data files. 



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