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%%
%% This is file `tikzlibraryshadows.blur.code.tex',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% pgf-blur.dtx (with options: `texfile')
%% Copyright 2012 Martin Giese, martingi@ifi.uio.no
%%
%% This file is under the LaTeX Project Public License
%% See CTAN archives in directory macros/latex/base/lppl.txt.
%%
%% DESCRIPTION:
%% `pgf-blur' adds blurred/faded/fuzzy shadows to TikZ/PGF
%%
\def\fileversion{1.01}
\def\filedate{2012/04/24}
\message{ v\fileversion, \filedate}
\usetikzlibrary{shadows}
\usetikzlibrary{calc}
\tikzset{
/tikz/shadow blur radius/.store in=\pgfbs@radius,
/tikz/shadow blur radius=.4ex,
/tikz/shadow blur extra rounding/.store in=\pgfbs@extra@rounding,
/tikz/shadow blur extra rounding=\pgfutil@empty,
/tikz/shadow blur extra rounding/.default=\pgfbs@radius,
/tikz/shadow blur steps/.store in=\pgfbs@steps,
/tikz/shadow blur steps=4,
/tikz/shadow opacity/.store in=\pgfbs@opacity,
/tikz/shadow opacity=40,
/tikz/blur shadow/.style={
shadow scale=1,
shadow xshift=.5ex,
shadow yshift=-.5ex,
preaction=render blur shadow,
every shadow,
#1,
},
/tikz/render blur shadow/.code={
\pgfbs@savebb
\pgfsyssoftpath@getcurrentpath{\pgfbs@input@path}%
\pgfbs@compute@shadow@bbox
\pgfbs@process@rounding{\pgfbs@input@path}{\pgfbs@fadepath}%
\pgfbs@apply@canvas@transform
\colorlet{pstb@shadow@color}{white!\pgfbs@opacity!black}%
\pgfdeclarefading{shadowfading}{\pgfbs@paint@fading}%
\pgfsetfillcolor{black}%
\pgfsetfading{shadowfading}%
{\pgftransformshift{\pgfpoint{\pgfbs@midx}{\pgfbs@midy}}}%
\pgfbs@usebbox{fill}%
\pgfbs@restorebb
},
}
\def\pgfbs@savebb{%
\edef\pgfbs@restorebb{%
\global\pgf@picminx=\the\pgf@picminx\relax
\global\pgf@picmaxx=\the\pgf@picmaxx\relax
\global\pgf@picminy=\the\pgf@picminy\relax
\global\pgf@picmaxy=\the\pgf@picmaxy\relax
}%
}
\def\restorebb{}%
\def\pgfbs@process@rounding#1#2{
\expandafter\ifx\pgfbs@extra@rounding\pgfutil@empty%
\pgfprocessround{#1}{#2}%
\else%
\pgfmathsetmacro\pgfbs@exrd@val{\pgfbs@extra@rounding}%
\pgfbs@roundpath{#1}{\pgfbs@exrd@val pt}%
\pgfsyssoftpath@getcurrentpath{\pgfbs@extraroundedpath}%
\pgfprocessround{\pgfbs@extraroundedpath}{#2}%
\fi%
}
\def\pgfbs@roundpath#1#2{%
{%
\def\pgfbs@rp@skipround{%
\let\pgfbs@rp@possibleround\pgfbs@rp@insertround}%
\def\pgfbs@rp@insertround{\pgfsyssoftpath@specialround{#2}{#2}}%
\let\pgfbs@rp@possibleround\pgfbs@rp@insertround%
%
\def\pgfsyssoftpath@movetotoken##1##2{%
\pgfsyssoftpath@moveto{##1}{##2}}%
\def\pgfsyssoftpath@linetotoken##1##2{%
\pgfbs@rp@possibleround\pgfsyssoftpath@lineto{##1}{##2}}%
\def\pgfsyssoftpath@rectcornertoken##1##2##3##4##5{%
\pgf@xa=##1\relax%
\advance\pgf@xa by##4%
\pgf@ya=##2\relax%
\advance\pgf@ya by##5%
\pgfsyssoftpath@moveto{##1}{##2}%
\pgfbs@rp@possibleround%
\pgfsyssoftpath@lineto{\the\pgf@xa}{##2}%
\pgfbs@rp@possibleround%
\pgfsyssoftpath@lineto{\the\pgf@xa}{\the\pgf@ya}%
\pgfbs@rp@possibleround%
\pgfsyssoftpath@lineto{##1}{\the\pgf@ya}%
\pgfbs@rp@possibleround%
\pgfsyssoftpath@closepath}%
\def\pgfsyssoftpath@curvetosupportatoken%
##1##2##3##4##5##6##7##8{%
\pgfbs@rp@possibleround%
\pgfsyssoftpath@curveto{##1}{##2}{##4}{##5}{##7}{##8}}%
\def\pgfsyssoftpath@closepathtoken##1##2{%
\pgfbs@rp@possibleround\pgfsyssoftpath@closepath}%
\def\pgfsyssoftpath@specialroundtoken##1##2{%
\pgfmathsetmacro\pgfbs@rp@ra{max(##1,#2)}%
\pgfmathsetmacro\pgfbs@rp@rb{max(##2,#2)}%
\pgfsyssoftpath@specialround%
{\pgfbs@rp@ra pt}{\pgfbs@rp@rb pt}%
\let\pgfbs@rp@possibleround\pgfbs@rp@skipround%
}
#1%
}
}
\def\pgfbs@compute@shadow@bbox{%
\edef\pgfbs@minx{\the\pgf@pathminx}%
\edef\pgfbs@miny{\the\pgf@pathminy}%
\edef\pgfbs@maxx{\the\pgf@pathmaxx}%
\edef\pgfbs@maxy{\the\pgf@pathmaxy}%
\pgfmathsetmacro\pgfbs@midx{0.5*(\pgfbs@minx + \pgfbs@maxx)}%
\pgfmathsetmacro\pgfbs@midy{0.5*(\pgfbs@miny + \pgfbs@maxy)}%
\pgfmathsetmacro\pgfbs@minx{\pgfbs@minx - \pgfbs@radius}%
\pgfmathsetmacro\pgfbs@miny{\pgfbs@miny - \pgfbs@radius}%
\pgfmathsetmacro\pgfbs@maxx{\pgfbs@maxx + \pgfbs@radius}%
\pgfmathsetmacro\pgfbs@maxy{\pgfbs@maxy + \pgfbs@radius}%
\pgfmathsetmacro\pgfbs@wd{\pgfbs@maxx - \pgfbs@minx}%
\pgfmathsetmacro\pgfbs@ht{\pgfbs@maxy - \pgfbs@miny}%
\pgfsyssoftpath@setcurrentpath\pgfutil@empty%
\pgfsyssoftpath@rect{\pgfbs@minx pt}{\pgfbs@miny pt}%
{\pgfbs@wd pt}{\pgfbs@ht pt}%
\pgfsyssoftpath@getcurrentpath{\pgfbs@shadow@bbox}%
\pgfsyssoftpath@setcurrentpath\pgfutil@empty%
}
\def\pgfbs@set@fading@pic@bbox{
\global\pgf@picminx=\pgfbs@minx pt\relax
\global\pgf@picminy=\pgfbs@miny pt\relax
\global\pgf@picmaxx=\pgfbs@maxx pt\relax
\global\pgf@picmaxy=\pgfbs@maxy pt\relax
}
\def\pgfbs@usefadepath#1{%
\pgfsyssoftpath@setcurrentpath{\pgfbs@fadepath}%
\pgfsyssoftpath@flushcurrentpath%
\pgfusepath{#1}%
}
\def\pgfbs@usebbox#1{%
\pgfsyssoftpath@setcurrentpath{\pgfbs@shadow@bbox}%
\pgfsyssoftpath@flushcurrentpath%
\pgfusepath{#1}%
}
\def\pgfbs@apply@canvas@transform{
\pgflowlevel{
\pgftransformshift{\pgfpoint{\pgfbs@midx}{\pgfbs@midy}}
\pgftransformscale{\pgfkeysvalueof{/tikz/shadow scale}}
\pgftransformshift{\pgfpoint%
{\pgfkeysvalueof{/tikz/shadow xshift}-\pgfbs@midx}
{\pgfkeysvalueof{/tikz/shadow yshift}-\pgfbs@midy}
}
}
}
\def\pgfbs@paint@fading{
\pgfpicture
% fix bounding box.
\pgfbs@set@fading@pic@bbox
% compute increments for line width and opacity
\pgfmathsetmacro\pgfbs@op@step{50/\pgfbs@steps}
\pgfmathsetmacro\pgfbs@wth@step{4*\pgfbs@radius/(2*\pgfbs@steps-1)}
% draw the outer part of the fading,
% starting with lightest, outermost line
\pgfsetroundjoin
\pgfmathsetmacro\pgfbs@max@i{\pgfbs@steps-2}
\pgfmathsetmacro\pgfbs@wth{2*\pgfbs@radius}
\pgfmathsetmacro\pgfbs@op{100-0.5*\pgfbs@op@step}
\foreach \pgfbs@i in {0,...,\pgfbs@max@i} {
\pgfsetlinewidth{\pgfbs@wth pt}
\pgfsetstrokecolor{black!\pgfbs@op!pstb@shadow@color}
\pgfbs@usefadepath{stroke}
\pgfmathsetmacro\pgfbs@wth{\pgfbs@wth-\pgfbs@wth@step}
\global\let\pgfbs@wth=\pgfbs@wth
\pgfmathsetmacro\pgfbs@op{\pgfbs@op-\pgfbs@op@step}
\global\let\pgfbs@op=\pgfbs@op
}
% clip to inside of path
\scope
\pgfbs@usefadepath{clip}
% fill inside with final darkest shadow color
\pgfsetfillcolor{pstb@shadow@color}
\pgfbs@usebbox{fill}
% draw the inner part of the fading,
% starting with the darkest, innermost line
\pgfmathsetmacro\pgfbs@wth{2*\pgfbs@radius}
\pgfmathsetmacro\pgfbs@op{0.5*\pgfbs@op@step}
\foreach \pgfbs@i in {0,...,\pgfbs@max@i} {
\pgfsetlinewidth{\pgfbs@wth pt}
\pgfsetstrokecolor{black!\pgfbs@op!pstb@shadow@color}
\pgfbs@usefadepath{stroke}
\pgfmathsetmacro\pgfbs@wth{\pgfbs@wth-\pgfbs@wth@step}
\global\let\pgfbs@wth=\pgfbs@wth
\pgfmathsetmacro\pgfbs@op{\pgfbs@op+\pgfbs@op@step}
\global\let\pgfbs@op=\pgfbs@op
}
\endscope
% a final stroke to hide clip/antialiasing artifcats
\pgfsetstrokecolor{black!50!pstb@shadow@color}
\pgfsetlinewidth{0.5*\pgfbs@wth@step}
\pgfbs@usefadepath{stroke}
\endpgfpicture
}
\endinput
%%
%% End of file `tikzlibraryshadows.blur.code.tex'.
|
