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Diffstat (limited to 'Master/texmf-dist/tex/generic/pgf/basiclayer/pgfcoreshade.code.tex')
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diff --git a/Master/texmf-dist/tex/generic/pgf/basiclayer/pgfcoreshade.code.tex b/Master/texmf-dist/tex/generic/pgf/basiclayer/pgfcoreshade.code.tex new file mode 100644 index 00000000000..707c1708789 --- /dev/null +++ b/Master/texmf-dist/tex/generic/pgf/basiclayer/pgfcoreshade.code.tex @@ -0,0 +1,409 @@ +\ProvidesFileRCS $Header: /cvsroot/pgf/pgf/generic/pgf/basiclayer/pgfcoreshade.code.tex,v 1.3 2005/07/17 22:34:19 tantau Exp $ + +% Copyright 2005 by Till Tantau <tantau@cs.tu-berlin.de>. +% +% This program can be redistributed and/or modified under the terms +% of the GNU Public License, version 2. + + +% +% Parsing functions +% +\newdimen\pgf@max +\newcount\pgf@sys@shading@range@num +\def\pgf@parsefunc#1{% + \edef\temp{{#1}}% + \expandafter\pgf@convertrgbstring\temp% + \edef\temp{{\pgf@rgbconv}}% + \expandafter\pgf@@parsefunc\temp} +\def\pgf@@parsefunc#1{% + \let\pgf@bounds=\@empty% + \let\pgf@funcs=\@empty% + \let\pgf@psfuncs=\@empty% + \let\pgf@encode=\@empty% + \let\pgf@sys@shading@ranges=\@empty% + \pgf@sys@shading@range@num=0\relax% + \pgf@parsefirst[#1; ]% + \pgf@parselastdom[#1; ]% + \pgf@parsemid[#1; ]% + \ifx\pgf@bounds\@empty% + \edef\pgf@pdfparseddomain{0 1}% + \edef\pgf@pdfparsedfunction{\pgf@singlefunc\space}% + \else% + \edef\pgf@pdfparseddomain{\pgf@doma\space\pgf@domb}% + \edef\pgf@pdfparsedfunction{% + << /FunctionType 3 /Domain [\pgf@doma\space\pgf@domb] /Functions + [\pgf@funcs\space] /Bounds [\pgf@bounds] /Encode [0 1 \pgf@encode] + >> }% + \fi% + \xdef\pgf@psfuncs{\pgf@psfuncs}% + } +\def\pgf@parsefirst[rgb(#1)=(#2,#3,#4)#5]{% + \setlength\pgf@x{#1}% + \edef\pgf@sys@shading@start@pos{\the\pgf@x}% + \pgf@sys@bp@correct\pgf@x% + \edef\pgf@doma{\pgf@sys@tonumber{\pgf@x}}% + \edef\pgf@prevx{\pgf@sys@tonumber{\pgf@x}}% + \pgf@getrgbtuplewithmixin{#2}{#3}{#4}% + \edef\pgf@sys@shading@start@rgb{\pgf@sys@rgb}% + \let\pgf@sys@prevcolor=\pgf@sys@shading@start@rgb% + \let\pgf@sys@prevpos=\pgf@sys@shading@start@pos% + \edef\pgf@prevcolor{\pgf@rgb}% + \edef\pgf@firstcolor{\pgf@rgb}} +\def\pgf@parselastdom[rgb(#1)=(#2,#3,#4); {% + \@ifnextchar]{% + \setlength\pgf@x{#1}% + \edef\pgf@sys@shading@end@pos{\the\pgf@x}% + \pgf@max=\pgf@x\relax% + \pgf@sys@bp@correct\pgf@x% + \edef\pgf@domb{\pgf@sys@tonumber{\pgf@x}}% + \pgf@getrgbtuplewithmixin{#2}{#3}{#4}% + \edef\pgf@sys@shading@end@rgb{\pgf@sys@rgb}% + \@gobble}{\pgf@parselastdom[}} +\def\pgf@parsemid[rgb(#1)=(#2,#3,#4); {\pgf@parserest[} +\def\pgf@parserest[rgb(#1)=(#2,#3,#4); {% + \advance\pgf@sys@shading@range@num by1\relax% + \@ifnextchar]{% + \pgf@getrgbtuplewithmixin{#2}{#3}{#4}% + \edef\pgf@singlefunc{\space% + << /FunctionType 2 /Domain [0 1] /C0 + [\pgf@prevcolor] /C1 [\pgf@rgb] /N 1 >> }% + \edef\pgf@funcs{\pgf@funcs\space% + << /FunctionType 2 /Domain [\pgf@doma\space\pgf@domb] /C0 + [\pgf@prevcolor] /C1 [\pgf@rgb] /N 1 >> }% + \edef\pgf@psfuncs{\pgf@prevx\space \pgf@rgb\space \pgf@prevcolor\space pgfshade \pgf@psfuncs}% + \setlength\pgf@x{#1}% + \edef\pgf@sys@shading@ranges{\pgf@sys@shading@ranges{{\pgf@sys@prevpos}{\the\pgf@x}{\pgf@sys@prevcolor}{\pgf@sys@rgb}}}% + \edef\pgf@sys@prevpos{\the\pgf@x}% + \let\pgf@sys@prevcolor=\pgf@sys@rgb% + \@gobble}{% + \setlength\pgf@x{#1}% + \pgf@getrgbtuplewithmixin{#2}{#3}{#4}% + \edef\pgf@sys@shading@ranges{\pgf@sys@shading@ranges{{\pgf@sys@prevpos}{\the\pgf@x}{\pgf@sys@prevcolor}{\pgf@sys@rgb}}}% + \edef\pgf@sys@prevpos{\the\pgf@x}% + \let\pgf@sys@prevcolor=\pgf@sys@rgb% + \edef\pgf@psfuncs{\pgf@prevx\space \pgf@rgb\space \pgf@prevcolor\space pgfshade \pgf@psfuncs}% + \pgf@sys@bp@correct\pgf@x% + \edef\pgf@prevx{\pgf@sys@tonumber{\pgf@x}}% + \edef\pgf@bounds{\pgf@bounds\space\pgf@sys@tonumber{\pgf@x}}% + \edef\pgf@encode{\pgf@encode\space0 1}% + \edef\pgf@singlefunc{\space% + << /FunctionType 2 /Domain [0 1] /C0 + [\pgf@prevcolor] /C1 [\pgf@rgb] /N 1 >> }% + \edef\pgf@funcs{\pgf@funcs\space% + << /FunctionType 2 /Domain [\pgf@doma\space\pgf@domb] /C0 + [\pgf@prevcolor] /C1 [\pgf@rgb] /N 1 >> }% + \edef\pgf@prevcolor{\pgf@rgb}% + \pgf@parserest[}} + +\def\pgf@getrgbtuplewithmixin#1#2#3{% + \definecolor{pgfshadetemp}{rgb}{#1,#2,#3}% + \@ifundefined{applycolormixins}{}{\applycolormixins{pgfshadetemp}}% + \extractcolorspec{pgfshadetemp}{\pgf@tempcolor}% + \expandafter\convertcolorspec\pgf@tempcolor{rgb}{\pgf@rgbcolor}% + \expandafter\pgf@getrgb@@\pgf@rgbcolor!} +\def\pgf@getrgb@@#1,#2,#3!{% + \def\pgf@rgb{#1 #2 #3}% + \def\pgf@sys@rgb{{#1}{#2}{#3}}% +} + + +\def\pgf@convertrgbstring#1{% + \def\pgf@rgbconv{}% + \pgf@converttorgb#1]% + } +\def\pgf@converttorgb{% + \@ifnextchar]{\@gobble}%done! + {% + \@ifnextchar;{\pgf@grabsemicolor}% + {% + \@ifnextchar r{\pgf@grabrgb}% + {% + \@ifnextchar g{\pgf@grabgray}% + {% + \@ifnextchar c{\pgf@grabcolor}% + {\PackageError{pgfshade}{Illformed shading + specification}{}\pgf@converttorgb}% + }% + }% + }% + }% +} +\def\pgf@grabsemicolor;{% + \edef\pgf@rgbconv{\pgf@rgbconv; }\pgf@converttorgb} +\def\pgf@grabrgb rgb(#1)=(#2,#3,#4){% + \edef\pgf@rgbconv{\pgf@rgbconv rgb(#1)=(#2,#3,#4)}\pgf@converttorgb} +\def\pgf@grabgray gray(#1)=(#2){% + \edef\pgf@rgbconv{\pgf@rgbconv rgb(#1)=(#2,#2,#2)}\pgf@converttorgb} +\def\pgf@grabcolor color(#1)=(#2){% + \colorlet{pgf@tempcol}{#2}% + \extractcolorspec{pgf@tempcol}{\pgf@tempcolor}% + \expandafter\convertcolorspec\pgf@tempcolor{rgb}{\pgf@rgbcolor}% + \expandafter\pgf@convgetrgb@\expandafter{\pgf@rgbcolor}{#1}% +} +\def\pgf@convgetrgb@#1#2{% + \edef\pgf@rgbconv{\pgf@rgbconv rgb(#2)=(#1)}\pgf@converttorgb} + + + + +% Declares a horizontal shading for later use. The shading is a +% horizontal bar that changes its color. +% +% #1 = name of the shading for later use +% #2 = height of the shading +% #3 = color specification in the following format: A list of colors +% that the bar should have at certain points. If the bar should +% be red at 1cm, this is specified as +% "rgb(1cm)=(1,0,0)". Multiple specifications are separated by a +% semicolon and a space. At least two specifications must be +% given. The specified positions must be given in increasing +% order. +% +% Example: +% +% \pgfdeclarehorizontalshading{redtogreentoblue}{1cm}{% +% rgb(0cm)=(1,0,0); % red +% rgb(1cm)=(0,1,0); % green +% rgb(2cm)=(0,0,1)} +% +% \begin{document} +% The following bar is 2cm long: \pgfuseshading{redtogreentoblue}. +% \end{document} + +\def\pgfdeclarehorizontalshading{\@ifnextchar[\pgf@declarehorizontalshading{\pgf@declarehorizontalshading[]}}% +\def\pgf@declarehorizontalshading[#1]#2#3#4{% + \expandafter\def\csname pgf@deps@pgfshading#2!\endcsname{#1}% + \expandafter\ifx\csname pgf@deps@pgfshading#2!\endcsname\@empty% + \pgfsys@horishading{#2}{#3}{#4}% + \else% + \expandafter\def\csname pgf@func@pgfshading#2!\endcsname{\pgfsys@horishading}% + \expandafter\def\csname pgf@args@pgfshading#2!\endcsname{{#3}{#4}}% + \expandafter\let\csname @pgfshading#2!\endcsname=\@empty% + \fi} + + +% Declares a vertical shading for later use. +% +% #1 = name of the shading for later use +% #2 = height of the shading +% #3 = color specification +% +% Example: +% +% \pgfdeclareverticalshading{redtogreentoblue}{1cm}{% +% rgb(0cm)=(1,0,0); % red +% rgb(1cm)=(0,1,0); % green +% rgb(2cm)=(0,0,1)} +% +% \begin{document} +% The following bar is 2cm high: \pgfuseshading{redtogreentoblue}. +% \end{document} + +\def\pgfdeclareverticalshading{\@ifnextchar[\pgf@declareverticalshading{\pgf@declareverticalshading[]}}% +\def\pgf@declareverticalshading[#1]#2#3#4{% + \expandafter\def\csname pgf@deps@pgfshading#2!\endcsname{#1}% + \expandafter\ifx\csname pgf@deps@pgfshading#2!\endcsname\@empty% + \pgfsys@vertshading{#2}{#3}{#4}% + \else% + \expandafter\def\csname pgf@func@pgfshading#2!\endcsname{\pgfsys@vertshading}% + \expandafter\def\csname pgf@args@pgfshading#2!\endcsname{{#3}{#4}}% + \expandafter\let\csname @pgfshading#2!\endcsname=\@empty% + \fi} + + +% Declares a radial shading for later use. +% +% #1 = name of the shading for later use +% #2 = center of inner circle +% #3 = color specification +% +% Description: +% +% A radial shading creates a smooth color transition between two +% circles. The center of the inner circle is at the give position. Its +% radius is the start of the color specification. The +% center of the outer circle is at the center of the whole shading, +% whose radius is the end of the color specification. For example, +% suppose the color specification is "rgb(1cm)=(1,1,1); rgb(2cm)=(0,0,0)". +% Then the shading would be 4cm times 4cm large. The inner circle would +% have diameter 1cm and the outer circle would have diameter 2cm. The +% outer circle would be centered in the middle of the shading, whereas +% the outer circle would be centered at the given position. +% +% Example: +% +% \pgfdeclareradialshading{redtogreentoblue}{\pgfpoint{2cm}{2cm}}{% +% rgb(10pt)=(1,0,0); % red +% rgb(2cm)=(0,1,0); % green +% rgb(3cm)=(0,0,1)} +% +% \begin{document} +% The following ball has diameter 3cm: \pgfuseshading{redtogreentoblue}. +% \end{document} + +\def\pgfdeclareradialshading{\@ifnextchar[\pgf@declareradialshading{\pgf@declareradialshading[]}}% +\def\pgf@declareradialshading[#1]#2#3#4{% + \expandafter\def\csname pgf@deps@pgfshading#2!\endcsname{#1}% + \expandafter\ifx\csname pgf@deps@pgfshading#2!\endcsname\@empty% + \pgfsys@radialshading{#2}{#3}{#4}% + \else% + \expandafter\def\csname pgf@func@pgfshading#2!\endcsname{\pgfsys@radialshading}% + \expandafter\def\csname pgf@args@pgfshading#2!\endcsname{{#3}{#4}}% + \expandafter\let\csname @pgfshading#2!\endcsname=\@empty% + \fi} + + +% Inserts a box into the text that contains a previously defined +% shading. +% +% #1 = Name of a shading +% +% Example: +% +% \pgfuseshading{redtogreentoblue} + +\def\pgfuseshading#1{% + \edef\pgf@shadingname{@pgfshading#1}% + \pgf@tryextensions{\pgf@shadingname}{\pgfalternateextension}% + \expandafter\@ifundefined\expandafter{\pgf@shadingname}% + {\PackageError{pgfshade}{Undefined shading "#1"}{}}% + {% + {% + \globalcolorsfalse% + \def\pgf@shade@adds{}% + \@ifundefined{pgf@deps\pgf@shadingname}% + {}% + {% + \edef\@list{\csname pgf@deps\pgf@shadingname\endcsname}% + \@for\@temp:=\@list\do{% + {% + \@ifundefined{applycolormixins}{}{\applycolormixins{\@temp}}% + \extractcolorspec{\@temp}{\pgf@tempcolor}% + \expandafter\convertcolorspec\pgf@tempcolor{rgb}{\pgf@rgbcolor}% + \xdef\pgf@shade@adds{\pgf@shade@adds,\pgf@rgbcolor}% + }% + }% + }% + \expandafter\pgf@strip@shadename\pgf@shadingname!!% + \@ifundefined{@pgfshading\pgf@basename\pgf@shade@adds!}% + {% + {% + \expandafter\def\expandafter\@temp\expandafter{\csname pgf@func\pgf@shadingname\endcsname}% + \edef\@args{{\pgf@basename\pgf@shade@adds}}% + \expandafter\expandafter\expandafter\def% + \expandafter\expandafter\expandafter\@@args% + \expandafter\expandafter\expandafter{\csname pgf@args\pgf@shadingname\endcsname}% + \expandafter\expandafter\expandafter\@temp\expandafter\@args\@@args% + % + }% + }% + {}% + \pgf@invokeshading{\csname @pgfshading\pgf@basename\pgf@shade@adds!\endcsname}% + }% + }% +} + +\def\pgf@strip@shadename @pgfshading#1!!!{\def\pgf@basename{#1}} + +\def\pgf@invokeshading#1{% + \ifpgfpicture% + \pgfsys@shadinginsidepgfpicture{#1}% + \else% + \pgfsys@shadingoutsidepgfpicture{#1}% + \fi% +} + + +% Create an alias name for a shading +% +% #1 = name of the alias +% #2 = name of the original +% +% Example: +% +% \pgfaliasshading{shading!25}{shadingshaded} + +\def\pgfaliasshading#1#2{% + \expandafter\let\expandafter\pgf@temp\expandafter=\csname @pgfshading#2!\endcsname% + \expandafter\let\csname @pgfshading#1!\endcsname=\pgf@temp% + \expandafter\let\expandafter\pgf@temp\expandafter=\csname pgf@deps@pgfshading#2!\endcsname% + \expandafter\let\csname pgf@deps@pgfshading#1!\endcsname=\pgf@temp% + \expandafter\let\expandafter\pgf@temp\expandafter=\csname pgf@func@pgfshading#2!\endcsname% + \expandafter\let\csname pgf@func@pgfshading#1!\endcsname=\pgf@temp% + \expandafter\let\expandafter\pgf@temp\expandafter=\csname pgf@args@pgfshading#2!\endcsname% + \expandafter\let\csname pgf@args@pgfshading#1!\endcsname=\pgf@temp% +} + + + + +% Shades the current path, but does not discard it. +% +% #1 - a shading (see below) +% #2 - an angle +% +% Description: +% +% \pgfshadepath ``tries'' to fill the +% current path with a shading. The shading's original size should +% completely cover the area between (0,0) and (100bp,100bp). The +% shading will be rotated by #2 and then rescaled so that it +% completely covers the path. Then the path will be used (locally) for +% clipping and the shading is drawn. +% +% After all this, the path can still be used for the normal +% stroking/clipping operations. +% +% The shading is rotated around its middle. If no rotation occurs, the +% lower left corner of the path will lie on (25bp, 25bp), the upper +% right corner on (75bp, 75bp). +% +% Example: +% +% \pgfdeclareverticalshading{myshading}{100bp}{color(0pt)=(red); color(100bp)=(green)} +% +% \pgfpathmoveto{\pgforigin} +% \pgfpathlineto{\pgfxy(1,0)} +% \pgfpathlineto{\pgfxy(1,1)} +% \pgfshadepath{myshading}{0} +% \pgfusepath{stroke} + +\def\pgfshadepath#1#2{% + \ifdim\pgf@pathminx=16000pt% + \PackageWarning{pgfshade}{No path specified that can be filled}% + \else% + \begingroup% + \pgfsys@beginscope% + % Calculate center: + \pgf@xb=.5\pgf@pathmaxx% + \advance\pgf@xb by.5\pgf@pathminx% + \pgf@yb=.5\pgf@pathmaxy% + \advance\pgf@yb by.5\pgf@pathminy% + % Calculate scaling: + \pgf@xc=\pgf@pathmaxx% + \advance\pgf@xc by-\pgf@pathminx% + \pgf@yc=\pgf@pathmaxy% + \advance\pgf@yc by-\pgf@pathminy% + \pgf@xc=.02\pgf@xc% + \pgf@yc=.02\pgf@yc% + \pgfsyssoftpath@invokecurrentpath% + \pgfsys@clipnext% + \pgfsys@discardpath% + % Compute new transformation matrix: + \pgf@process{\pgfsincos{#2}}% + \pgf@xa=-\pgf@x% + \pgfsys@transformcm{1}{0}{0}{1}{\pgf@xb}{\pgf@yb}% + \pgfsys@transformcm% + {\pgf@sys@tonumber{\pgf@xc}}{0}% + {0}{\pgf@sys@tonumber{\pgf@yc}}{0pt}{0pt}% + \pgfsys@transformcm% + {\pgf@sys@tonumber{\pgf@y}}{\pgf@sys@tonumber{\pgf@x}}% + {\pgf@sys@tonumber{\pgf@xa}}{\pgf@sys@tonumber{\pgf@y}}{0pt}{0pt}% + \pgfuseshading{#1}% + \pgfsys@endscope% + \endgroup% + \fi% +} + +\endinput |