[Okular-devel] [Bug 271444] New: Okular renders PDFs with transparent/clipped images incorrectly...

[splittingpixels at gmail.com]

https://bugs.kde.org/show_bug.cgi?id=271444

           Summary: Okular renders PDFs with transparent/clipped images
                    incorrectly...
           Product: okular
           Version: 0.10.5
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: PDF backend
        AssignedTo: okular-devel at kde.org
        ReportedBy: splittingpixels at gmail.com


Created an attachment (id=59187)
 --> (http://bugs.kde.org/attachment.cgi?id=59187)
A .pdf file which demonstrates the document rendering bug.

Version:           0.10.5 (using KDE 4.4.5) 
OS:                Linux

If a .pdf contains a transparent image, AND if that transparent image has a
clip applied to it (ie. geometry that hides/reveals parts of the image) then
the colour of the transparent parts of the image get mangled.  Only those
portions of the image which are either entirely opaque or entirely transparent
are correct, while everything else in between has it's colour altered.

The attached .pdf was tested in Photoshop, Inkscape, GIMP, and Acrobat Reader
-- all of these applications rendered the document correctly, so it's certainly
an Okular issue.

Reproducible: Always

Steps to Reproduce:
1.) Load the attached file in Okular.
2.) Load it in another application like Acrobat Reader 6.0.0, or GIMP 2.6.11.
3.) Compare.

Actual Results:  
1.) Upon loading the attached document into Okular, green regions will be
visible on the page, yet there is no green in the document.
2.) Now, compare to the very same document rendered by Acrobat Reader, GIMP,
etc, and you will see that the document looks quite different (no green, only
yellow and white)

Expected Results:  
Okular's rendering of the document should match that of the other applications
listed above.  It is not rendering the document correctly.

OS: Linux (i686) release 2.6.32-31-generic
Compiler: cc

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