Debenu Quick PDF Library - PDF SDK Community Forum : PdfLibrary v10: Bug when adding PNG http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 04 May 2026 10:45:09 +0000 Fri, 06 Nov 2015 08:58:57 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=3164 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[PdfLibrary v10: Bug when adding PNG : HiWalther,The issue was fixed...]]> http://www.quickpdf.org/forum/pdflibrary-v10-bug-when-adding-png_topic3164_post12761.html#12761 Author: Paul
Subject: 3164
Posted: 06 Nov 15 at 8:58AM

Hi Walther,

The issue was fixed and the solution is available in the version 12.11. You can download it form here:

http://www.debenu.com/products/development/debenu-pdf-library/trial/
]]> Fri, 06 Nov 2015 08:58:57 +0000 http://www.quickpdf.org/forum/pdflibrary-v10-bug-when-adding-png_topic3164_post12761.html#12761 <![CDATA[PdfLibrary v10: Bug when adding PNG : HiWalther,Yes, you are correct,...]]> http://www.quickpdf.org/forum/pdflibrary-v10-bug-when-adding-png_topic3164_post12678.html#12678 Author: Rowan
Subject: 3164
Posted: 20 Aug 15 at 9:27AM

Hi Walther,

Yes, you are correct, that appears to be a mistake. We'll fix that in the next release. Thanks!

Just be careful posting source code on forums, this is only a small snippet so not a big deal but preferably just post the version number, filename and line number with suggested change. If there's a bigger suggested change better to email Debenu directly.

Cheers,
- Rowan.
]]> Thu, 20 Aug 2015 09:27:22 +0000 http://www.quickpdf.org/forum/pdflibrary-v10-bug-when-adding-png_topic3164_post12678.html#12678 <![CDATA[PdfLibrary v10: Bug when adding PNG : DebenuPDFLibraryPNG.pas has a...]]> http://www.quickpdf.org/forum/pdflibrary-v10-bug-when-adding-png_topic3164_post12677.html#12677 Author: Walther
Subject: 3164
Posted: 20 Aug 15 at 8:41AM

DebenuPDFLibraryPNG.pas has a function TPNGReader.FilterData where there's a code snip like this:
  ...
    SetLength(FAlphaData, AlphaDataByteCount * FHeight);
    if Length(FImageData) > 0 then
    begin
      FillChar(FAlphaData[1], Length(FAlphaData), 0);
    end;
  ...

This code is buggy and should most likely be:
  ...
    SetLength(FAlphaData, AlphaDataByteCount * FHeight);
    if Length(FAlphaData) > 0 then                 // FAlphaData replaced here!!!
    begin
      FillChar(FAlphaData[1], Length(FAlphaData), 0);
    end;
  ...

This caused some confusion within our development team. Wink If this is not fixed in version 11, you could probably merge in the fix there.
]]> Thu, 20 Aug 2015 08:41:46 +0000 http://www.quickpdf.org/forum/pdflibrary-v10-bug-when-adding-png_topic3164_post12677.html#12677