Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!decwrl!adobe!hawley
From: hawley@adobe.COM (Steve Hawley)
Newsgroups: comp.lang.postscript
Subject: Re: reading image data
Message-ID: <12925@adobe.UUCP>
Date: 20 Mar 91 18:34:44 GMT
References: <21257@shlump.nac.dec.com>
Reply-To: hawley@adobe.UUCP (Steve Hawley)
Organization: Adobe Systems Incorporated, Mountain View
Lines: 86

In article <21257@shlump.nac.dec.com> tatlow@dash.dlb5.dec.com (Tom Tatlow) writes:
>I have a Postscript file containing some image data, and I would like to be
>able to have the image drawn by a function.
> ...
>Is there any way I can store all of the hex image data in a big array or
>something
>and have the image procedure read it from there? What would the
>procedure 
>that's on the top of the stack before the call to "image" look like?

This is not too hard to do.  Here's a thing I did to draw a page full of
Bart Simpsons:

%!
% Bitmap of Bart Simpson.  Drawn and compiled into PostScript
% by Steve Hawley, 6/90.  The image tiles very well.
%
/bartbits <
    00911114C014200000622228A0162000
    8C444448A4C431A914288888AAA42AAB
    8C311118C4A229910022222800000000
    00244448000014010028888800001C01
    00311114092214D90062222412AA1554
    00444446091494D50088CCCD40010000
    01117AAAC0002000062251117FE04000
    FC4440004460FFFF8888C00048C18888
    111140005147111122224000629A2222
    4444400045E444448888C00048888888
    11114000311111112222200022222222
    4444601DC44444448888A02228888888
    11112041111111112222204552222222
    44445041144444448888902228888888
    1111101DF11111112222300012222222
    44447000144444448888880018888888
    1111B000F11111112222A00062222222
    44448800244444448888F01FE8888888
    11111020111111112222282722222222
    44444819444444448888880288888888
    11111405111111112222240A222A2222
    4547C414F45444448D8C6BEB18948888
    3C9A10040927911142FE00040FE86222
    700200020801C44488FE00020FE28888
    109A0002092111112D2A10021236A222
    55446001F45544448A8FA00188888888
    111120009111111122222000A2222222
    44446000C44444448888C00048888888
    11114000511111112222400062222222
    44444000444444448888C00048888888
    1111400051111111FA223001FFFFFFFF
    06444FFE000000000188888C00000000
> def

% The bitmap is inverted, so I use this routine to flip all the
% bits.
0 1 bartbits length 1 sub
    { dup bartbits exch get 255 xor bartbits 3 1 roll put } bind for

/bart { % width height x y => ---
%% procedure to draw an image of Bart Simpson
    gsave translate scale
	% bart is 64x64
        64 64 1 [64 0 0 -64 0 64] {//bartbits} image
    grestore
} bind def

0 30.71988 800 {  % draw a page of barts.
    18 exch moveto
    gsave
        0 30.71988 550 {
            30.71988 30.71988 currentpoint bart 30.71988 0 rmoveto
        } for
    grestore
} bind for

% this does just a single one
% 72 72 300 400 bart

showpage

Enjoy.
Steve Hawley
hawley@adobe.com
-- 
"Did you know that a cow was *MURDERED* to make that jacket?"
"Yes.    I didn't think there were any witnesses, so I guess I'll have to kill
 you too." -Jake Johansen