I need help - I can help - Transparent PNG DrawImage

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Transparent PNG DrawImage

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=2710
Printed Date: 19 May 24 at 11:08PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Transparent PNG DrawImage

Posted By: Eric24
Subject: Transparent PNG DrawImage
Date Posted: 18 Aug 13 at 7:38PM

If I call AddImageFromFile, with options = 0/normal, and then later call DrawImage, if the image loaded is a PNG with an alpha layer (for transparency), will QPDF merge the image using the alpha layer? This isn't quite the effect I'm getting, so I wanted to be sure that this was supported functionality. Is there something I need to do to "enable" this (I've tried a few different options in AddImageFromFile, with no visible effect)?

Replies:

Posted By: Ingo
Date Posted: 18 Aug 13 at 10:13PM

Hi Eric!

Why not asking the FAQ ;-)

http://www.quickpdflibrary.com/faq/how-do-i-add-an-image-and-make-it-transparent.php" rel="nofollow - http://www.quickpdflibrary.com/faq/how-do-i-add-an-image-and-make-it-transparent.php

Here you can read what's possible regarding transparency.

Cheers, Ingo