Cannot render QuickReports graphics
Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=410
Printed Date: 18 May 24 at 10:49PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com
Topic: Cannot render QuickReports graphics
Posted By: JuanMaria
Subject: Cannot render QuickReports graphics
Date Posted: 09 May 06 at 12:47PM
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Hi,
I've found that I cannot print or render any graphics inserted on a QuickReport generated PDF. Those same documents can be rendered by Acrobat and my program can render most documents but the ones I nedd to render 
I've uploaded a sample on http://www.juanmaria.com/tmp/qrdoc.pdf - this link On this document there is a copy of this site logo but when rendered by QuickPdf it appears as a garbled picture. I would appreciate having some clue about this problem that is ruining a near finished program. Thanks in advance. ------------- Greetings from Spain. Juan Maria. |
Replies:
Posted By: swb1
Date Posted: 09 May 06 at 1:12PM
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This is not an uncommon rendering result. There are a number of threads in the forum that cover this topic in detail. You may wish to search on "Render" or "GDIplus". I will save you the time of reading through them and tell you that you will not find the answer in this forum. The solution may lie in the way in which you encode the image and/or the tool you use to create the PDF. Nonetheless, as far as I know, nobody participating in this forum has been able to solve the image rendering issues.
sb |
Posted By: JuanMaria
Date Posted: 09 May 06 at 1:13PM
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I'm still investiganting and I've found that if I edit the graphic -even if I only move it a little- with Acrobat and save the document it starts working on qpdf.
I've made a file comparation and it semms that Acrobat lefts the old picture and inserts a new one at the end of the document and it seems that this new one has no /Filter [/ASCII85Decode /LZWDecode] Might be that this is where QPDF fails?. Is there any workaround?. Thanks again. ------------- Greetings from Spain. Juan Maria. |
Posted By: JuanMaria
Date Posted: 09 May 06 at 1:18PM
Thank you. Yes, I've been reading some posts about that and, sadly, as you say I didn't find any solution. I'm considering buying the source code but I'm afraid about spending a lot of money and not being able to solve this problem. ------------- Greetings from Spain. Juan Maria. |
swb1 wrote:Posted By: swb1
Date Posted: 09 May 06 at 2:45PM
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I found that there are a number of problems with rendering. Some where the parameters for GDIplus calls are incorrect, others involving filters, and some where GDIplus fails to do the right thing. I do not think there is any work-around and the code to make the fixes requires GDIplus API knowledge. I have very little - so I will not attempt to tackle it until it is a direct problem for my applications.
sb |
Posted By: chicks
Date Posted: 09 May 06 at 6:35PM
If the problem is in the LZWDecode, it could be that you inserted the image as a .GIF, which, IIRC, uses LZW compression. Try converting the image to another format, such as .png, to see if it gets saved by your report engine without the LZWDecode. Just a thought. |
Posted By: JuanMaria
Date Posted: 10 May 06 at 2:49AM
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Thank you for your answers!
I finally solved the problem. Since I had little hopes working on the QuickPdf side of the problem, I started reading the QuickReport PDFFilter source looking for a way to eliminate the /LZWDecode filter. It was easier than I suspected, the problem was that this filter is undoumented on the QuickReport manuals but after looking at the comentaries on the source file I learned that there was a boolean property named "compressionOn". I had only to add a line to my source code and now it works smoothly  I'll include it below in case someone else gests stuck with this problem.
qf := TQRPDFFilter.create(fn); try qf.CompressionOn := False; // That was the key ExportToFilter(qf); finally qf.Free; end; ------------- Greetings from Spain. Juan Maria. |
Posted By: tyke
Date Posted: 27 Jul 07 at 9:39AM
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Hi JuanMaria! It was more than a year ago, that you wrote to this topic, and I am interested in, from where can someone get a PDFFilter object for Delphi. There is so few results on searhing: TQRPDFFilter, and I could not pay to qusoft without being sure, that PDF Filter will work fine to me as well. If you could help me with somehow I would appreciate it! Thanks! Tyke |
Posted By: JuanMaria
Date Posted: 01 Aug 07 at 6:11AM
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Hi, TQRPDFFilter is part of the Quick Report package that you can get at http://www.qbss.com/ ------------- Greetings from Spain. Juan Maria. |