I need help - I can help - PDF to TIFF Conversion

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PDF to TIFF Conversion

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=2656
Printed Date: 26 Jun 25 at 9:58AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: PDF to TIFF Conversion

Posted By: arpipeline
Subject: PDF to TIFF Conversion
Date Posted: 28 May 13 at 6:17PM

I am using RenderDocumentToFile and have successfully converted PDF to TIFF files using option #7. I am not pleased with the file size at 150 DPI so I tried option #10, G4 compression (XP with GDI+ installed) and I get an invalid TIFF file having a size of 1 KB.

I have set the GDI+ path and file name and forced the renderer engine type to GDI+, but nothing changes.

Any help is appreciated.

Replies:

Posted By: AndrewC
Date Posted: 29 May 13 at 1:57PM

The documentation states that option 10 doesn't work with Windows XP. Windows Vista is the first version of GDI+ that supports Group4 compression.

You may have to use something like LibTIFF to compress the images output from QPL to Group4 TIFF.

Andrew.

Posted By: arpipeline
Date Posted: 29 May 13 at 4:10PM

Thank you Andrew.

I did see the documentation, but misread it. I am going to try the Cairo route because we are stuck on XP for the moment.

Posted By: arpipeline
Date Posted: 29 May 13 at 6:40PM

The same problem exists with Cairo and option 10. Files of 1 KB are created and unreadable. I am going to test on Windows 7 and report back.

Posted By: AndrewC
Date Posted: 30 May 13 at 2:04AM

The Group 4 compression in GDI+ is only available in Vista, Win 7. The Cairo code in QPL is only used for rendering and not for image conversion. What version of DQPL are you using ? 9.14 includes a bug fix to allow Group4 compression in the 64bit builds of DQPL.

Andrew.

Posted By: arpipeline
Date Posted: 30 May 13 at 11:02PM

Andrew,

I am using version 9.13 and 32-bit XP. As I said we are stuck with XP at the moment. I do have a license of Windows 7 and 8, but I have not had a chance to test on these boxes.