# Set the size of pgf picture?

I have a pgf picture which I insert with:

\input{m1.pgf}


But the image is too big. Instead of regenerating a smaller image, I'd rather take advantage of vector graphics, and have XeLaTeX scale it. How do I set the width of pgf picture (keeping its aspect ratio)?

# MWE

tex:

\documentclass{article}

\usepackage{polyglossia} % support for languages

% fonts:
\defaultfontfeatures{Scale=MatchLowercase,Mapping=tex-text} % without this XeLaTeX won't turn "--" into dashes
\setmainfont{DejaVu Sans}
\setsansfont{DejaVu Sans}
\setmonofont{DejaVu Sans Mono}

% pgf:
\usepackage{pgf}

\begin{document}

\input{m1.pgf}

\end{document}


Sample pgf: m1.pgf (it's too big to cite it here, and I can't make much smaller).

Maybe simply \scalebox:

\documentclass{article}

\usepackage{polyglossia} % support for languages

% fonts:
\defaultfontfeatures{Scale=MatchLowercase,Mapping=tex-text} % without this XeLaTeX won't turn "--" into dashes
\setmainfont{DejaVu Sans}
\setsansfont{DejaVu Sans}
\setmonofont{DejaVu Sans Mono}

% pgf:
\usepackage{pgf}

\begin{document}

\scalebox{0.6}{\input{m1.pgf}}

\end{document}

• What is 0.6? Fraction of original size of the image, or fraction of page to be used for an image? I need the second. May 31 '13 at 18:25
• @Adobe Fraction of original size of the image. The value 0.6 is probably to small for you, but it is only an example, of course. May 31 '13 at 18:27
• That's already very good. But it will be even better if there were a way to force pgf picture fit in given fraction of the textwidth. May 31 '13 at 18:31
• @Adobe Then you are rather expecting a solution like this: \resizebox{0.7\textwidth}{!}{\input{m1.pgf}}. May 31 '13 at 18:58

You can first draw a phantom to determine the sizes, compute the scaling factor(s) and draw the image again:

## Code

\documentclass[a5paper]{scrreprt}
\usepackage{xifthen}
\usepackage{environ}
\usepackage{tikz}

\pgfmathsetmacro{\maximumpicturewidth}{10}% max width in cm
\pgfmathsetmacro{\maximumpictureheight}{5}% max height in cm

\newcommand{\getxyscale}
{   \path (current bounding box.south west);
\pgfgetlastxy{\xsw}{\ysw}
\path (current bounding box.north east);
\pgfgetlastxy{\xne}{\yne}
\pgfmathsetlengthmacro{\picwidth}{\xne-\xsw}
\pgfmathsetlengthmacro{\picheight}{\yne-\ysw}
\pgfmathsetlengthmacro{\maxpicwidth}{\maximumpicturewidth*28.453}
\pgfmathsetlengthmacro{\maxpicheight}{\maximumpictureheight*28.453}
\pgfmathsetmacro{\xscale}{\maxpicwidth/\picwidth}
\pgfmathsetmacro{\yscale}{\maxpicheight/\picheight}
\xdef\xscalefactor{\xscale}
\xdef\yscalefactor{\yscale}
}

\NewEnviron{autoscaletikz}%
{\noindent\hphantom{\vphantom{\begin{tikzpicture}\BODY\getxyscale\end{tikzpicture}}}%
\noindent\begin{tikzpicture}[xscale=\xscalefactor,yscale=\yscalefactor]\BODY\end{tikzpicture}}

\begin{document}

\begin{autoscaletikz}
\fill[red] (0,0) circle (5 and 1);
\fill[draw=black,left color=blue, right color=orange] (0.5,0) rectangle (4,2);
\draw (2,-1) rectangle (18,1);
\draw (4,-0.5)
\foreach \x in {1,...,12}
{   arc ({mod(\x,4)*90}:{(mod(\x,4)+1)*90}:{\x/10})
}   ;
\end{autoscaletikz}

\end{document}


If you want to keep the aspect ratio, simply change the environment:

\NewEnviron{autoscaletikz}%
{\noindent\hphantom{\vphantom{\begin{tikzpicture}\BODY\getxyscale\end{tikzpicture}}}%
\noindent\begin{tikzpicture}[xscale=\xscalefactor,yscale=\xscalefactor]\BODY\end{tikzpicture}}


## Result

• Doesn't work with the sample pgf that I provide in a question. But still - might be useful for coders. Jun 5 '13 at 11:35

The answer given in the comments by Przemysław Scherwentke works perfectly: simply use

\resizebox{\textwidth}{!}{\input{m1.pgf}}