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<span id="Image-Scaling"></span><div class="header">
<p>
Previous: <a href="Image-Syntax.html" accesskey="p" rel="prev">Image Syntax</a>, Up: <a href="Images.html" accesskey="u" rel="up">Images</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p>
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<hr>
<span id="Image-Scaling-1"></span><h4 class="subsection">10.2.2 Image Scaling</h4>
<span id="index-Images_002c-scaling"></span>
<span id="index-Scaling-images"></span>
<span id="index-Width-of-images"></span>
<span id="index-Height-of-images"></span>
<span id="index-Aspect-ratio-of-images"></span>
<span id="index-Distorting-images"></span>
<p>The optional <var>width</var> and <var>height</var> arguments to the
<code>@image</code> command (see the previous section) specify the size to
which to scale the image. They are only taken into account in TeX.
If neither is specified, the image is presented in its natural size
(given in the file); if only one is specified, the other is scaled
proportionately; and if both are specified, both are respected, thus
likely distorting the original image by changing its aspect ratio.
</p>
<span id="index-Dimensions-and-image-sizes"></span>
<p>The <var>width</var> and <var>height</var> may be specified using any valid TeX
dimension, namely:
</p>
<dl compact="compact">
<dt>pt</dt>
<dd><span id="index-Points-_0028dimension_0029"></span>
<p>point (72.27pt = 1in)
</p></dd>
<dt>pc</dt>
<dd><span id="index-Picas"></span>
<p>pica (1pc = 12pt)
</p></dd>
<dt>bp</dt>
<dd><span id="index-Big-points"></span>
<p>big point (72bp = 1in)
</p></dd>
<dt>in</dt>
<dd><span id="index-Inches"></span>
<p>inch
</p></dd>
<dt>cm</dt>
<dd><span id="index-Centimeters"></span>
<p>centimeter (2.54cm = 1in)
</p></dd>
<dt>mm</dt>
<dd><span id="index-Millimeters"></span>
<p>millimeter (10mm = 1cm)
</p></dd>
<dt>dd</dt>
<dd><span id="index-Didot-points"></span>
<p>didôt point (1157dd = 1238pt)
</p></dd>
<dt>cc</dt>
<dd><span id="index-Ciceros"></span>
<p>cicero (1cc = 12dd)
</p></dd>
<dt>sp</dt>
<dd><span id="index-Scaled-points"></span>
<p>scaled point (65536sp = 1pt)
</p></dd>
</dl>
<span id="index-ridt_002eeps"></span>
<p>For example, the following will scale a file <samp>ridt.eps</samp> to one
inch vertically, with the width scaled proportionately:
</p>
<div class="example">
<pre class="example">@image{ridt,,1in}
</pre></div>
<span id="index-epsf_002etex"></span>
<p>For <code>@image</code> to work with TeX, the file <samp>epsf.tex</samp> must be
installed somewhere that TeX can find it. (The standard location is
<samp><var>texmf</var>/tex/generic/dvips/epsf.tex</samp>, where <var>texmf</var> is a
root of your TeX directory tree.) This file is included in the
Texinfo distribution and is also available from
<a href="ftp://tug.org/tex/epsf.tex">ftp://tug.org/tex/epsf.tex</a>, among other places.
</p>
<p><code>@image</code> can be used within a line as well as for displayed
figures. Therefore, if you intend it to be displayed, be sure to leave
a blank line before the command, or the output will run into the
preceding text.
</p>
<p>Image scaling is presently implemented only in TeX, not in HTML or
any other sort of output.
</p>
<hr>
<div class="header">
<p>
Previous: <a href="Image-Syntax.html" accesskey="p" rel="prev">Image Syntax</a>, Up: <a href="Images.html" accesskey="u" rel="up">Images</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p>
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