[gs-bugs] [Bug 690674] New: Affine images are rendered wrong.

bugs.ghostscript.com-bugzilla-daemon at ghostscript.com bugs.ghostscript.com-bugzilla-daemon at ghostscript.com
Fri Jul 31 07:14:32 PDT 2009


http://bugs.ghostscript.com/show_bug.cgi?id=690674

           Summary: Affine images are rendered wrong.
           Product: MuPDF
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P4
         Component: fitz
        AssignedTo: tor.andersson at artifex.com
        ReportedBy: tor.andersson at artifex.com
         QAContact: gs-bugs at ghostscript.com


After the image clamp-to-edge code was inserted affine images are misrendered. The current image 
drawing code fills the bounding box that covers the image area with samples taken from the image. This 
means that images that have a non-rectilinear transform (non-90-degree rotation or shearing) will "leak".  
We should use the path scanning logic to fill a rectangular path with image samples instead, and then we 
will also get antialiased image edges as an added bonus.



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