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https://issues.apache.org/jira/browse/PDFBOX-6157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-6157:
------------------------------------
Description:
Follow-up to PDFBOX-6156, which was fixed with a correct but not very efficient
solution. The original code should be fixed so that the last bits of a byte are
handled without touching the other bits of the destination.
How to test this: use the test code from PDFBOX-6151 include the file
mentioned. To see intermediate images, save the bitmaps {{regionBitmap}} and
{{pageBitmap}} in JBIG2Page.createNormalPage() with a call like this near
{{Bitmaps.blit()}}:
{code:java}
ImageIO.write(Bitmaps.asBufferedImage(pageBitmap), "png", new
File("XXXX","JPeg2PageResultBitmap-" + System.currentTimeMillis() + ".png"));
{code}
was:
Follow-up to PDFBOX-6151, which was fixed with a correct but not very efficient
solution. The original code should be fixed so that the last bits of a byte are
handled without touching the other bits of the destination.
How to test this: use the test code from PDFBOX-6151 include the file
mentioned. To see intermediate images, save the bitmaps {{regionBitmap}} and
{{pageBitmap}} in JBIG2Page.createNormalPage() with a call like this near
{{Bitmaps.blit()}}:
{code:java}
ImageIO.write(Bitmaps.asBufferedImage(pageBitmap), "png", new
File("XXXX","JPeg2PageResultBitmap-" + System.currentTimeMillis() + ".png"));
{code}
> Fix original Bitmaps.blit() code
> --------------------------------
>
> Key: PDFBOX-6157
> URL: https://issues.apache.org/jira/browse/PDFBOX-6157
> Project: PDFBox
> Issue Type: Task
> Components: JBIG2
> Affects Versions: 3.0.4 JBIG2
> Reporter: Tilman Hausherr
> Priority: Major
>
> Follow-up to PDFBOX-6156, which was fixed with a correct but not very
> efficient solution. The original code should be fixed so that the last bits
> of a byte are handled without touching the other bits of the destination.
> How to test this: use the test code from PDFBOX-6151 include the file
> mentioned. To see intermediate images, save the bitmaps {{regionBitmap}} and
> {{pageBitmap}} in JBIG2Page.createNormalPage() with a call like this near
> {{Bitmaps.blit()}}:
> {code:java}
> ImageIO.write(Bitmaps.asBufferedImage(pageBitmap), "png", new
> File("XXXX","JPeg2PageResultBitmap-" + System.currentTimeMillis() + ".png"));
> {code}
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