[gs-bugs] [Bug 689811] New: Custom Color Callbacks not working with banding

bugs.ghostscript.com-bugzilla-daemon at ghostscript.com bugs.ghostscript.com-bugzilla-daemon at ghostscript.com
Wed Apr 30 13:48:02 PDT 2008


           Summary: Custom Color Callbacks not working with banding
           Product: Ghostscript
           Version: HEAD
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P4
         Component: Color
        AssignedTo: ralph.giles at artifex.com
        ReportedBy: ralph.giles at artifex.com
         QAContact: gs-bugs at ghostscript.com

After compiling Ghostscript with ENABLE_CUSTOM_COLOR_CALLBACK = 1 (gsnamecl.h)
and OBJECT_TYPE_EXAMPLE = 1 (gsncdummy.c) The following commandline generates
output tinted by object type, showing that the custom color callbacks are being

debugobj/gs -sDEVICE=tiff32nc -dBufferSpace=100000000 -o test-300.tiff -r300 -c
"<< /CustomColorCallback 32 string .pantonecallback >> setsystemparams" -f

However, running the same command at 400 dpi:

debugobj/gs -sDEVICE=tiff32nc -dBufferSpace=100000000 -o test-400.tiff -r400 -c
"<< /CustomColorCallback 32 string .pantonecallback >> setsystemparams" -f

Does not show the object tint on the images, indicating that the custom color
callbacks are not invoked in the same cases. The first command doesn't band (as
shown by -ZL) while the second does.

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