TIFF files loading fail with AddImageFromFile

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   Hi, 

I'm currently experiencing a weird issue with some TIFF files. While most TIFF files I've been using load well with QuickPDF's AddImageFromFile function, some TIFF files (which are rendered fine using GDI) cannot be opened with AddImageFromFile. It also either fails (i.e. returns 0) or freezes at this point.

By the time I'm posting this topic, I cannot attach a problematic TIFF file but I will do it ASAP. I have now uploaded a buggy tiff file on rapidshare: see http://rapidshare.com/files/417488285/buggy_tiff.tif
It seems to me as opening any multipages 300 DPI bitonal TIFF (CCIT 4 Compression) and rotating one of the pages using the default Windows TIFF renderer file is enough to fashion the file in such a way QuickPDF won't be able to use it.

Regarding the technical stuff, we're using QuickPDF 7.19 both from in .NET (C#) projects and JAVA projects. The bug seems to be independant of the hosting machine OS (it happens both on Windows XP SP3 and Windows Server 2008).
But w/ .NET, it freezes (in a WCF REST web service) while in JAVA (desktop application), it simply fails (returns 0).

At the moment, the only workaround we've found is to temporarily convert the image to a (supposedly) safe format like PNG before passing it to AddImageFromFile, which is pretty unconvenient, resources-consuming, error-prone and making our code less maintainable.

As a side note, it's also pretty annoying that the TIFF page parameter and "force GDI" parameter occupy the same parameter slot on the AddImageFromFile method.

So, (sorry for these newbie questions)
A/ Is this issue known?
B/ Is there any kind of public issue-tracker for QuickPDF?
C/ What is the average time for fixing a bug once the development team has been able to reproduce it? (aka Should we wait for the next release, or as my company is a registered customer of QuickPDF, can we get a hotfix sooner?)

Thanks for your time and consideration.

Best Regards,
Benjamin Neau

Edited by bneau - 06 Sep 10 at 9:13PM

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bneau Members Profile Find Members Posts Beginner Joined: 06 Sep 10 Location: Paris, France Status: Offline Points: 3	Post Options Post Reply Quote bneau Report Post Thanks(0) Quote Reply Topic: TIFF files loading fail with AddImageFromFile Posted: 06 Sep 10 at 8:33PM
	Hi, I'm currently experiencing a weird issue with some TIFF files. While most TIFF files I've been using load well with QuickPDF's AddImageFromFile function, some TIFF files (which are rendered fine using GDI) cannot be opened with AddImageFromFile. It also either fails (i.e. returns 0) or freezes at this point. ~~By the time I'm posting this topic, I cannot attach a problematic TIFF file but I will do it ASAP.~~ I have now uploaded a buggy tiff file on rapidshare: see http://rapidshare.com/files/417488285/buggy_tiff.tif It seems to me as opening any multipages 300 DPI bitonal TIFF (CCIT 4 Compression) and rotating one of the pages using the default Windows TIFF renderer file is enough to fashion the file in such a way QuickPDF won't be able to use it. Regarding the technical stuff, we're using QuickPDF 7.19 both from in .NET (C#) projects and JAVA projects. The bug seems to be independant of the hosting machine OS (it happens both on Windows XP SP3 and Windows Server 2008). But w/ .NET, it freezes (in a WCF REST web service) while in JAVA (desktop application), it simply fails (returns 0). At the moment, the only workaround we've found is to temporarily convert the image to a (supposedly) safe format like PNG before passing it to AddImageFromFile, which is pretty unconvenient, resources-consuming, error-prone and making our code less maintainable. As a side note, it's also pretty annoying that the TIFF page parameter and "force GDI" parameter occupy the same parameter slot on the AddImageFromFile method. So, (sorry for these newbie questions) A/ Is this issue known? B/ Is there any kind of public issue-tracker for QuickPDF? C/ What is the average time for fixing a bug once the development team has been able to reproduce it? (aka Should we wait for the next release, or as my company is a registered customer of QuickPDF, can we get a hotfix sooner?) Thanks for your time and consideration. Best Regards, Benjamin Neau Edited by bneau - 06 Sep 10 at 9:13PM

bneau Members Profile Find Members Posts Beginner Joined: 06 Sep 10 Location: Paris, France Status: Offline Points: 3	Post Options Post Reply Quote bneau Report Post Thanks(0) Quote Reply Posted: 06 Sep 10 at 8:41PM
	~~Just tried QuickPDF 7.21.~~ ~~It does fix the problem.~~ ~~It's just awesome.~~ ~~I take it it's "Improvements to handling of CCITT images" ;-)~~ ~~Thanks.~~ It was a mistake. I deduced from no freeze that it was gone, but in fact, it still fails at loading some TIFF files... So the problem is still happening and I'm still investigating. Edited by bneau - 06 Sep 10 at 9:01PM

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 07 Sep 10 at 7:37AM
	Hi Benjamin! This is hard stuff i fear. I've made the same experiences like you did. The tiff format have wide spreaded convention - so i've converted your tiff to other tiff-formats (lzw and some other ones) but it doesn't matter what i choose i've always got a black image... After rotating the image and saving as jpg i could work on it like you can. You should upload the tiff on the official support pages. There's an option to do this. The support team won't take a rapidshare-file. Please keep in mind: This here is only a user-user-forum. Cheers and welcome here, Ingo

bneau Members Profile Find Members Posts Beginner Joined: 06 Sep 10 Location: Paris, France Status: Offline Points: 3	Post Options Post Reply Quote bneau Report Post Thanks(0) Quote Reply Posted: 07 Sep 10 at 6:23PM
	Hey Ingo, Thanks for your valuable input. One thing tho, I couldn't find the option to upload a file. Kind regards, Benjamin

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3530	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 07 Sep 10 at 6:52PM
	Hi! Why not try http://www.quickpdf.org There you can click on "QuickPDF Homepage": http://www.quickpdflibrary.com/ There is a support-menu, take "ask a question"... and then "Technical support". All in one: http://www.quickpdflibrary.com/support/support-query.php Cheers, Ingo