I need help - I can help - pdf shows inverted images

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pdf shows inverted images

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=1490
Printed Date: 21 May 25 at 11:00AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: pdf shows inverted images

Posted By: wjbons
Subject: pdf shows inverted images
Date Posted: 17 Jun 10 at 7:42AM

Hi,

I am testing the control and encounter a problem.

I load a PDF file, convert it's pages to images and display them.
The worsest is that i see b/w images that are inverted? They look like negatives.
I have an image of the differences. I can send it including the original pdf if you like.

QP.LoadFromFile("pdf\catalogus_novus_impexi_germanus.pdf")

QP.SetPageDimensions(800, 600)

Dim Output() As Byte = QP.RenderPageToString(96, i, 5)

Dim byteStream As IO.MemoryStream = New IO.MemoryStream(Output)

Dim Img As New BitmapImage

Img.BeginInit()

Img.StreamSource = byteStream

Img.EndInit()

Dim Pic As New Image

Pic.Source = Img

Pic.Stretch = Stretch.None

Replies:

Posted By: Vankir
Date Posted: 01 Sep 10 at 7:40PM

Hi!

I have similar issue. Have you found any resolution?

Thanks,
Kirill

Posted By: Ingo
Date Posted: 01 Sep 10 at 9:15PM

Hi Kirill!

This depends on the used compression method inside the pdf.
It's a problem but it's seldom.
To make QuickPDF better you should send your pdf-sample
and an error-description to the official support pages. There's
an upload-option, too:
http://www.quickpdflibrary.com/support/support-query.php

Cheers and welcome here,
Ingo

Posted By: Vankir
Date Posted: 02 Sep 10 at 9:50AM

Hi Ingo,

Thank you for the prompt answer. We opened incident with you about this (3048_6f2pvogcqv7lfbhq) but got that everybody is out of the office till July 27 :). The problem is that documents that we have are confidential and we cannot send them. Do you have any logging functionality in your lib to figure out this problem? I want to say that the problem is not seldom. in 50% of our images that were generated by HP and Xerox MFPs we have this issue.

Thank you!

Posted By: Ingo
Date Posted: 02 Sep 10 at 11:52AM

Hi!

The problem is seldom but you're working mostly on these seldom documents ;-)
I fear that Debenu can't do much for you if you don't have samples.
Please keep in mind that the users (like me) here in this user-user-help-forum
aren't responsible for this fantastic product. We're only users (me for over seven years now).

Cheers, Ingo