http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Fri, 01 May 2026 05:17:00 +0000 Wed, 11 Nov 2009 15:56:45 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=1270 http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ http://www.quickpdf.org/forum/transparent-jpeg-images_topic1270_post5824.html#5824 Author: divo
Subject: 1270
Posted: 11 Nov 09 at 3:56PM

Hi there,

I have a problem with grayscale jpeg images. If I add a grayscale jpeg and set an image mask for transparency no error is thrown, but if your view the pdf via Acroread 9.2 it informs you about an error on the page.

Below is a small program that reproduces the behaviour. (I'm using Delphi2009) At the end of this post is a base64 encoded 1x1-px jpeg that one can use.

Is this a bug in the library or am I doing something wrong here?


program error;

{$APPTYPE CONSOLE}

uses
  SysUtils,
  QuickPDF0717;

var
  QP: TQuickPDF0717;
  retval: Integer;

begin
  try
    QP:= TQuickPDF0717.Create;
    if QP.UnlockKey(YOUR KEY HERE) = 0 then raise Exception.Create('UnlockKey');
    if QP.NewDocument = 0 then raise Exception.Create('NewDocument');
    if QP.AddImageFromFile('error.jpg', 0) = 0 then raise Exception.Create('AddImageFromFile');
    if QP.SetImageMask(0.9, 0.9, 0.9, 1, 1, 1) = 0 then raise Exception.Create('SetImageMask');
    if QP.DrawScaledImage(0, QP.ImageHeight, 0.5) = 0 then raise Exception.Create('DrawImage');
    if QP.SaveToFile('dummy.pdf') = 0 then raise Exception.Create('SaveToFile');

  except
    on E:Exception do begin
      Writeln(E.Classname, ': ', E.Message);
      Readln;
    end;
  end;
end.


/9j/4AAQSkZJRgABAQEASABIAAD/2wBDAAUDBAQEAwUEBAQFBQUGBwwIBwcHBw8LCwkMEQ8SEhEP
ERETFhwXExQaFRERGCEYGh0dHx8fExciJCIeJBweHx7/wAALCAABAAEBAREA/8QAFAABAAAAAAAA
AAAAAAAAAAAACP/EABQQAQAAAAAAAAAAAAAAAAAAAAD/2gAIAQEAAD8AZb//2Q==

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