How to tell if color PS printer?

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2 total messages Started by J. Daniel Smith Thu, 01 Oct 1992 03:26

#3909

Author: J. Daniel Smith
Date: Thu, 01 Oct 1992 03:26

18 lines
1392 bytes

How can I tell with absolute certainty if a printer can print in
color?  With Level 1 PostScript a solution that probably almost always
worked was to check for something like "setcmykcolor" since that
operator was only available on color printers.  However, using Level 2
PostScript, "setcmykcolor" is supported in all implemtations; its up
to the rendering mechanism to determine how best to render the color.

My situation is this:  I have a company logo that uses just one color.
On a color output device, I want to use the correct color; however on
a B/W device, I want to use black and not some shade of gray.

Thanks for any info,
   Dan
-- 
=========================================================================
J. Daniel Smith                           dsmith@ann-arbor.cad.slb.com
Applicon Schlumberger                     dsmith@aaaca1.sinet.slb.com 
Ann Arbor, Michigan (USA)                 ...!uunet!sharkey!applga!dsmith

Re: How to tell if color PS printer?

#3956

Author: Rich Berlin
Date: Tue, 06 Oct 1992 16:12

51 lines
2099 bytes

In article <dsmith.717909971@aa.cad.slb.com> dsmith@aa.cad.slb.com (J. Daniel Smith) writes:
>How can I tell with absolute certainty if a printer can print in
>color?  With Level 1 PostScript a solution that probably almost always
>worked was to check for something like "setcmykcolor" since that
>operator was only available on color printers.  However, using Level 2
>PostScript, "setcmykcolor" is supported in all implemtations; its up
>to the rendering mechanism to determine how best to render the color.


Carl Orthlieb <orthlieb@adobe.com> posted the following awhile back.

-- Rich


-------- begin included message --------

The following code determines the number of device colors that a device has:
	0 - Unknown
	1 - Black and White
	3 - RGB or CMY
	4 - CMYK 

Hope this helps, Carl 8^)

%!
% Determine the number of device colors
/NDColors 1 def	% This will be the value if colorimage does not exist
/colorimage where {
	pop
	/NDColors 0		% Unknown
	statusdict begin 
		/processcolors where { 
			pop pop processcolors 
		}{
			/deviceinfo where { 
				pop deviceinfo /Colors known { 
					pop deviceinfo /Colors get 
				} if
			} if
		} ifelse
	end		% statusdict
	def
} if
(Number of Device Colors: ) print NDColors =

-------- end included message --------
--
===============================================================================
Richard.Berlin@Eng.Sun.COM   |   The significant problems we face cannot be
			     |   solved at the same level of thinking we were
			     |   at when we created them.  -- Albert Einstein

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