[gs-bugs] [Bug 693074] Using /sProcessColorModel=DeviceGray & -dColorConversionStrategy=/Gray doesn't convert all images to Gray

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Tue May 29 16:13:43 UTC 2012


http://bugs.ghostscript.com/show_bug.cgi?id=693074

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

--- Comment #3 from Ken Sharp <ken.sharp at artifex.com> 2012-05-29 16:13:43 UTC ---
(In reply to comment #2)

> I'll try to find something smaller. If this is any help: Ghostscript stops
> converting to gray at page 98 (1-97 are all in gray) so the last 32 pages stay
> in color.

I extracted page 98 and ran that, GS gives the following warning:

Unable to convert color space to Gray, reverting to LeaveColorUnchanged.

Documented values for ColorConversionStrategy are; LeaveColorUnchanged, sRGB
and DeviceIndependentColor.

The warning is new, its to prevent a seg fault. Since 'Gray' is not a
documented legal value for ColorConversionStrategy I'm inclined to feel this
isn't a bug....

Note that the distiller parameter documentation does not list 'Gray' as a legal
value either.

I'll bear this in mind when we revisit the colour code in pdfwrite however.

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