Re: fast rendering of 1-bit deep images

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Article #9145

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#9145

From: Ben Cranston
Date: Fri, 02 Mar 1990 20:38

38 lines
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Didn't really look at those tiny turkeys until after posting.  Some devices
invert the X or Y scales between user and device coordinates.  Looks like
better bet is:

m n idtransform abs exch abs exch scale

which forces the distance vector components to be positive.

%!
/inch { 72 mul } def
/picstr 3 string def

/imageturkey {
	24 23 idtransform abs exch abs exch scale
        24 23 1
	[24 0 0 -23 0 23]
        {currentfile picstr readhexstring pop}
        image
} def

gsave
        3 inch 4 inch translate
        imageturkey
	FFC4FF FFD8FF FFDB7F F1B6BF
	EEB6DF EB4DDF C349AF 8A0177
	E80073 E8A0EB E3F81D C7FC3B
	8FCE7D 071203 4D443D 44907B
	CE403D E715C3 F1C1FF F803FF
	FC07FF E1E7FF E007FF
grestore

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-- 
Sig     DS.L    ('ZBen')       ; Ben Cranston <zben@Trantor.UMD.EDU>
* Network Infrastructures Group, Computer Science Center
* University of Maryland at College Park
* of Ulm

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!tut.cis.ohio-state.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!aplcen!haven!umd5!zben
From: zben@umd5.umd.edu (Ben Cranston)
Newsgroups: comp.lang.postscript
Subject: Re: fast rendering of 1-bit deep images
Summary: OOPS make that: <m> <n> idtransform abs exch abs exch scale
Message-ID: <6198@umd5.umd.edu>
Date: 2 Mar 90 20:38:43 GMT
References: <1822@esquire.UUCP> <6197@umd5.umd.edu>
Reply-To: zben@umd5.umd.edu (Ben Cranston)
Organization: University of Maryland, College Park
Lines: 38

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