[gs-bugs] [Bug 691209] PS->PDF->PNG results in lines PS->PNG does not

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Wed Jun 1 14:49:46 UTC 2011


http://bugs.ghostscript.com/show_bug.cgi?id=691209

Ken Sharp <ken.sharp at artifex.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX

--- Comment #16 from Ken Sharp <ken.sharp at artifex.com> 2011-06-01 14:49:44 UTC ---
(In reply to comment #15)
> We ( customer 870 ) had the same problem. I tested the new idiom and it worked
> fine. But with the attached file tiff.ps a stackunderflow occures.

This IdiomSet is supplied as-is, and does not form part of Ghostscript. As such
we don't really want to do any further development or maintenance on it.

However:

The original Idiom assumes an RGB image, this one is in DeviceGray. So it only
supplies one parameter to scol, not three, leading to a stackunderflow while
trying to get the remaining parameters.

You can extend the idiom to test the current colour space in the replacement
for /scol and retrieve a different number of parameters from the stack
depending on the colour space. You would then also need to test the colour
space in the replacement for /Y in order to provide the correct number of
components for the current space before calling setcolor.

    {pop /IdiomB exch def /IdiomG exch def /IdiomR exch def IdiomR IdiomG
IdiomB setcolor} bind

    newpath IdiomR IdiomG IdiomB setcolor

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