1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_rect_calc_hscale</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="ch02s05.html#idp1126612844" title="Rectangle Utilities Reference"><link rel="prev" href="API-drm-rect-clip-scaled.html" title="drm_rect_clip_scaled"><link rel="next" href="API-drm-rect-calc-vscale.html" title="drm_rect_calc_vscale"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">drm_rect_calc_hscale</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-rect-clip-scaled.html">Prev</a>&#160;</td><th width="60%" align="center">Rectangle Utilities Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-rect-calc-vscale.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-rect-calc-hscale"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_rect_calc_hscale &#8212; 
2     calculate the horizontal scaling factor
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">drm_rect_calc_hscale </b>(</code></td><td>const struct drm_rect * <var class="pdparam">src</var>, </td></tr><tr><td>&#160;</td><td>const struct drm_rect * <var class="pdparam">dst</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">min_hscale</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">max_hscale</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1126719036"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>src</code></em></span></dt><dd><p>
4     source window rectangle
5    </p></dd><dt><span class="term"><em class="parameter"><code>dst</code></em></span></dt><dd><p>
6     destination window rectangle
7    </p></dd><dt><span class="term"><em class="parameter"><code>min_hscale</code></em></span></dt><dd><p>
8     minimum allowed horizontal scaling factor
9    </p></dd><dt><span class="term"><em class="parameter"><code>max_hscale</code></em></span></dt><dd><p>
10     maximum allowed horizontal scaling factor
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1126723748"></a><h2>Description</h2><p>
12   Calculate the horizontal scaling factor as
13   (<em class="parameter"><code>src</code></em> width) / (<em class="parameter"><code>dst</code></em> width).
14</p></div><div class="refsect1"><a name="idp1126725084"></a><h2>RETURNS</h2><p>
15   The horizontal scaling factor, or errno of out of limits.
16</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-drm-rect-clip-scaled.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch02s05.html#idp1126612844">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-drm-rect-calc-vscale.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">drm_rect_clip_scaled</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">drm_rect_calc_vscale</span></td></tr></table></div></body></html>
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