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Bug 311228 - incorrect rendering of png alpha channel
incorrect rendering of png alpha channel
Status: RESOLVED NOTGNOME
Product: evince
Classification: Core
Component: general
0.3.x
Other Linux
: Normal major
: ---
Assigned To: Evince Maintainers
Evince Maintainers
Depends on:
Blocks:
 
 
Reported: 2005-07-22 08:24 UTC by Gianluca Sforna
Modified: 2005-07-27 08:57 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
sample pdf showing the issue (16.82 KB, application/pdf)
2005-07-22 08:29 UTC, Gianluca Sforna 		Details

Description Gianluca Sforna 2005-07-22 08:24:08 UTC 
Distribution/Version: Fedora Core 4

pdf documents containing png images with alpha channel are not rendered correctly.

To test this create a empty document (i used Openoffice) add a png image (of
course with alpha channel) and export the document to pdf.

Opening the pdf with evince you will see that the background is not visible
through th image.

I tested the same pdf with acrobat reader and the image is correctly displayed
Comment 1 Gianluca Sforna 2005-07-22 08:29:10 UTC 
Created attachment 49555 [details]
sample pdf showing the issue

As a test case, I am attaching a small pdf with two images. The first one has a
white background, while the second one a black one.

Evince shows both with a purple background.
Comment 2 Teppo Turtiainen 2005-07-22 15:55:14 UTC 
Could be related to bug 311208?
Comment 3 Marco Pesenti Gritti 2005-07-26 11:57:24 UTC 
Hi, this looks like a bug with the PDF backend.  Could you please follow these
instructions to help get this 
 bug fixed.  Thank You. http://live.gnome.org/Evince/PopplerBugs#poppler
Comment 4 Gianluca Sforna 2005-07-27 08:55:02 UTC 
It seems this is the same issue as:

https://bugs.freedesktop.org/show_bug.cgi?id=3098

do I have to add you on the CC list for that bug (as of point 4)?