new pgf package pgf-blur (20apr12)

git-svn-id: svn://tug.org/texlive/trunk@26092 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 213 insertions, 0 deletions

diff --git a/Master/texmf-dist/doc/latex/pgf-blur/README b/Master/texmf-dist/doc/latex/pgf-blur/README
new file mode 100644
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+Package pgf-blur
+----------------
+
+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.
+See http://www.ctan.org/tex-archive/help/Catalogue/licenses.lppl.html
+for the details of that license.
+
+DESCRIPTION:
+  `pgf-blur' adds blurred/faded/fuzzy shadows to TikZ/PGF
+
+Run (pdf)latex on pgf-blur.dtx to produce a TikZ library file
+and the documentation.
diff --git a/Master/texmf-dist/doc/latex/pgf-blur/tikzlibraryshadows.blur.code.tex b/Master/texmf-dist/doc/latex/pgf-blur/tikzlibraryshadows.blur.code.tex
new file mode 100644
index 00000000000..bf6fc97d92a
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/pgf-blur/tikzlibraryshadows.blur.code.tex
@@ -0,0 +1,198 @@
+%%
+%% 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{1.0}
+\def\filedate{2012/05/06}
+\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=3,
+  /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
+    % draw the outer part of the fading,
+    % starting with lightest, outermost line
+    \pgfsetroundjoin
+    \pgfmathsetmacro\pgfbs@max@i{\pgfbs@steps - 1}
+    \foreach \pgfbs@i in {0,...,\pgfbs@max@i} {
+      \pgfmathsetmacro\pgfbs@wth{%
+        2 * \pgfbs@radius * (1 - \pgfbs@i/\pgfbs@steps)}%
+      \pgfmathsetmacro\pgfbs@op{%
+        100 - (25/\pgfbs@steps) * (2*\pgfbs@i + 1)}%
+      \pgfsetlinewidth{\pgfbs@wth pt}
+      \pgfsetstrokecolor{black!\pgfbs@op!pstb@shadow@color}
+      \pgfbs@usefadepath{stroke}
+    }
+    % clip to inside of path
+    \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
+    \foreach \pgfbs@i in {0,...,\pgfbs@max@i} {
+      \pgfmathsetmacro\pgfbs@wth{%
+        2 * \pgfbs@radius * (1 - \pgfbs@i/\pgfbs@steps)}%
+      \pgfmathsetmacro\pgfbs@op{(25/\pgfbs@steps) * (2*\pgfbs@i + 1)}
+      \pgfsetlinewidth{\pgfbs@wth pt}
+      \pgfsetstrokecolor{black!\pgfbs@op!pstb@shadow@color}
+      \pgfbs@usefadepath{stroke}
+    }
+  \endpgfpicture
+}
+\endinput
+%%
+%% End of file `tikzlibraryshadows.blur.code.tex'.