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% This is the TikZ library patterns.images
% Load with \usetikzlibrary{patterns.images}
%
% Macro:
% - \pgfSetupImageAsPattern[<opt arguments for \pgfdeclareimage>]{<name>}{<path/file>}
%
% Keys are:
% - use image as pattern=<name>
% - image as pattern=<opt arguments for \pgftext>
\def\pgfsetupimageaspattern{\pgfutil@ifnextchar[\qrr@pgfsetupimageaspattern{\qrr@pgfsetupimageaspattern[]}}
\def\qrr@pgfsetupimageaspattern[#1]#2#3{% #1 = options
% #2 = image name
% #3 = file name
\pgfdeclareimage[#1]{qrr@pgf@iap@#2}{#3}%
\sbox\pgfutil@tempboxa{\pgfuseimage{qrr@pgf@iap@#2}}%
\expandafter\edef\csname qrr@pgf@iap@#2@\endcsname{{\the\wd\pgfutil@tempboxa}{\the\ht\pgfutil@tempboxa}}%
}
\tikzset{
image as pattern/name/.initial=,
image as pattern/option/.style=,
image as pattern/options/.style={/tikz/image as pattern/option/.append style={#1}},
image as pattern/.default=,
image as pattern/.code={
\tikzset{image as pattern/.cd,#1}
\pgfkeysgetvalue{/tikz/image as pattern/name}\tikz@temp
\pgfutil@ifxempty\tikz@temp{%
\tikzerror{You need to specify a name for the ``image-pattern'' to be used.}%
}{%
\edef\tikz@tempa{\expandafter\expandafter\expandafter\pgfutil@firstoftwo\csname qrr@pgf@iap@\tikz@temp @\endcsname}%
\edef\tikz@tempb{\expandafter\expandafter\expandafter\pgfutil@secondoftwo\csname qrr@pgf@iap@\tikz@temp @\endcsname}%
\pgfkeysalso{/tikz/path picture={%
\pgf@process{\pgfpointanchor{path picture bounding box}{north east}}%
\pgf@xa\pgf@x\pgf@ya\pgf@y
\pgf@process{\pgfpointanchor{path picture bounding box}{south west}}%
\pgf@xb\pgf@x\pgf@yb\pgf@y\pgf@yc\pgf@yb
\pgfutil@loop
{%
\pgfutil@loop
\expandafter\pgftext\expandafter[/tikz/image as pattern/option,at=\pgfqpoint{\pgf@xb}{\pgf@yb}]{\pgfuseimage{qrr@pgf@iap@\tikz@temp}}%
\ifdim\pgf@yb<\pgf@ya
\advance\pgf@yb\tikz@tempb
\pgfutil@repeat
}%
\ifdim\pgf@xb<\pgf@xa
\advance\pgf@xb\tikz@tempa
\pgf@yb\pgf@yc
\pgfutil@repeat
}}%
}
}
}
\endinput
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