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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Module: ZzTeX PostScript Facilities
%
% Synopsis: This module contains any and all facilities that rely on
% PostScript output.
%
% Author: Paul C. Anagnostopoulos
% Created: 21 January 1994
%
% Copyright 1989--2020 by Paul C. Anagnostopoulos
% under The MIT License (opensource.org/licenses/MIT)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Extra Encoded Characters
% ----- ------- ----------
\def \PSbackslash {\char 134\relax}
\def \PSbar {\char 138\relax}
\def \PSbullet {\char 142\relax}
\def \PSbraceleft {\char 137\relax}
\def \PSbraceright {\char 139\relax}
\def \PScent {\char 148\relax}
\def \PScopyright {\char 145\relax}
\def \PScurrency {\char 149\relax}
\def \PSdagger {\char 140\relax}
\def \PSddagger {\char 141\relax}
\def \PSdollar {\char 131\relax}
\def \PSgreater {\char 133\relax}
\def \PSless {\char 132\relax}
\def \PSordfeminine {\char 155\relax}
\def \PSordmasculine {\char 156\relax}
\def \PSparagraph {\char 143\relax}
\def \PSperthousand {\char 157\relax}
\def \PSpolishL {\char "A1\relax}
\def \PSpolishl {\char "A2\relax}
\def \PSregistered {\char 146\relax}
\def \PSsection {\char 144\relax}
\def \PSsterling {\char 158\relax}
\def \PStrademark {\char 147\relax}
\def \PSunderscore {\char 136\relax}
\def \PSudquote {\char 135\relax}
\def \PSusquote {\char 160\relax}
\def \PSyen {\char 159\relax}
% Import EPS File
% ------ --- ----
% The illustration \special is compatible with DVIPSONE, and with TeXtures
% if clip? is false.
% The scale is interpreted as follows:
% <= 33.333: normal scale, 1.0 = 100%
% > 33.333: TeX scale factor, 1000 = 100%
\def \specialimportartfile #1#2#3{% {name}{scale}{clip?}
\special{illustration #1 scaled #2
\if #3clip\fi}}
% This macro is a better variant of the preceding one. The scale
% argument is a true scale specified in points.
\def \specialplaceepsfile #1#2#3{% {name}{scale}{clip?}
{\tdimena = #2%
\if \dimgtrp{\tdimena}{33.333pt}% % Compensate for bizarre
\multiply \tdimena by 1000\relax % design of scaled option.
\fi
\special{illustration #1 scaled \thefactor\tdimena
\if #3\space clip\fi}}}
% This macro is used to import an EPS file for a glyph. The scale
% is specified as a percentage IN POINTS.
\def \specialplaceglyph #1#2#3{% {name}{percentage}{clip?}
{\tdimena = #2%
\divide \tdimena by 100
\special{illustration #1 scaled \thefactor\tdimena
\if #3\space clip\fi}}}
% Read EPS Bounding Box
% ---- --- -------- ---
\definedimen{\zbbxorigin}{0pt}
\definedimen{\zbbyorigin}{0pt}
{\catcode`\%=\catother
\gdef \zpercent {%}
} % \catcode
\edef \zboundingbox {\zpercent\zpercent BoundingBox}
\def \zatend {atend}
\definecount{\zbbstate}{0}
\def \zreadepsbb #1#2#3{% {\width}{\height}{file}
\def \zbbinfo {}%
\begingroup
\zsetepscatcodes
\openin \zreada #3\relax
\zbbstate = 0
\loop
\read \zreada to \zline
\ifeof \zreada
\zbbstate = 2
\else
\expandafter\zcheckbb \zline:.\zmark
\fi
\ifnum \zbbstate < 2 \repeat
\closein \zreada
\endgroup
\zsetbbsizes{#1}{#2}{#3}}
\def \zsetepscatcodes {%
\catcoderange{0}{"1F}{\catcomment}%
\catcode `\^^I = \catspace
\catcode \endlinechar = \catendofline
\uncatcode{\false}{\false}{\false}%
\catcode `\: = \catother
\catcoderange{"7E}{"FF}{\catcomment}}
\long \def \zcheckbb #1:#2#3\zmark{%
\def \znext {#1}%
\ifx \znext \zboundingbox
\zcheckatend #2#3()\zmark
\fi}
\long \def \zcheckatend #1(#2)#3\zmark{%
\def \znext {#2}%
\ifx \znext \zatend
\zbbstate = 1
\else
\gdef \zbbinfo {#1}%
\ifnum \zbbstate = 0 \zbbstate = 2\fi
\fi}
\def \zsetbbsizes #1#2#3{%
\if \emptydefp{\zbbinfo}%
\warning{missbb}{Art file `#3' has no bounding box}%
#1 = 20pc #2 = 10pc
\else
\expandafter \zcalcbb \zbbinfo \zmark{#1}{#2}%
\fi}
\def \zcalcbb #1 #2 #3 #4 #5\zmark#6#7{%
\calculate #6= {#3pt,-,#1pt,+,1pt}%
\calculate #7= {#4pt,-,#2pt,+,1pt}%
\global\zbbxorigin = #1pt
\global\zbbyorigin = #2pt\relax}
% Rotate Boxes
% ------ -----
\def \rotatebox #1#2{% {\box}{degrees}
\special{CTM: push rotate #2}%
\box #1%
\special{CTM: pop}}
\def \rotatetext #1#2{% {text}{degrees}
\setbox \zboxa = \hbox{#1}%
\rotatebox{\zboxa}{#2}}
% Colors
% ------
\def \colorspecial #1{%
\if \allowcolor
\special{#1}%
\fi}
% These commands are called in the output routine to make sure that
% everything added in the output routine is black.
\def \zoutputbeginblack {%
\colorspecial{color push gray 0}}
\def \zoutputendblack {%
\colorspecial{color pop}}
% Color Block
% ---- ------
\defineblock{\color}{\endcolor}{\false}{}
%~block color Type
% \colorspec = {...} % Color specifier.
%~end
\definetoks{\colorspec}
\def \color #1{% {type}
\beginblockscope{color}%
\global\increment \colordepth
\processdesign{\color}{#1}%
\global\increment \colornumber
\colorspecial{color push}%
\the\colorspec\zmark
\if \vmodep \vpenalty{\breaknever}\fi}
\def \endcolor {%
\global\decrement \colordepth
\endblockscope{color}%
\colorspecial{color pop}}
\def \setcolor #1{%
\begingroup
\processdesign{\color}{#1}%
\the\colorspec\zmark
\endgroup}
% Color specifiers:
\def \cmykcolor #1 #2 #3 #4\zmark{% c m y k\zmark
\colorspecial{color cmyk #1 #2 #3 #4}}
\def \graycolor #1\zmark{% gray\zmark
\colorspecial{color gray #1}}
\def \rgbcolor #1 #2 #3\zmark{% r g b\zmark
\colorspecial{color rgb #1 #2 #3}}
% Built-in colors:
\def \colorblackdesign {%
\colorspec = {\graycolor 0}}
\def \colorwhitedesign {%
\colorspec = {\graycolor 1}}
\def \colorproofnotereddesign {%
\colorspec = {\rgbcolor .5 0 0}}
% A useful shorthand:
\def \colortext #1#2{% {color}{text}
\color{#1}#2\endcolor}
% TeXtures
% --------
\def \TeXtures {%
\input zztures\relax}
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