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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>Transformations</title><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="start" href="index.html" title="Cairo: A Vector Graphics Library"><link rel="up" href="Drawing.html" title="Drawing"><link rel="prev" href="cairo-Patterns.html" title="Patterns"><link rel="next" href="cairo-Text.html" title="Text"><meta name="generator" content="GTK-Doc V1.6 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="pt01.html" title="Part I. Tutorial"><link rel="part" href="pt02.html" title="Part II. Reference"><link rel="chapter" href="Drawing.html" title="Drawing"><link rel="chapter" href="Fonts.html" title="Fonts"><link rel="chapter" href="Surfaces.html" title="Surfaces"><link rel="chapter" href="Support.html" title="Utilities"><link rel="index" href="ix01.html" title="Index"><link rel="appendix" href="language-bindings.html" title="Appendix A. Creating a language binding for cairo"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="cairo-Patterns.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="Drawing.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">Cairo: A Vector Graphics Library</th><td><a accesskey="n" href="cairo-Text.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#top_of_page" class="shortcut">Top</a>  |  <a href="#desc" class="shortcut">Description</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="cairo-Transformations"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><span class="refentrytitle"><a name="top_of_page"></a>Transformations</span></h2><p>Transformations — Manipulating the current transformation matrix</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><a name="synopsis"></a><h2>Synopsis</h2><pre class="synopsis">void <a href="cairo-Transformations.html#cairo-translate">cairo_translate</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double tx, double ty);void <a href="cairo-Transformations.html#cairo-scale">cairo_scale</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double sx, double sy);void <a href="cairo-Transformations.html#cairo-rotate">cairo_rotate</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double angle);void <a href="cairo-Transformations.html#cairo-transform">cairo_transform</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, const <a href="cairo-cairo-matrix-t.html#cairo-matrix-t">cairo_matrix_t</a> *matrix);void <a href="cairo-Transformations.html#cairo-set-matrix">cairo_set_matrix</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, const <a href="cairo-cairo-matrix-t.html#cairo-matrix-t">cairo_matrix_t</a> *matrix);void <a href="cairo-Transformations.html#cairo-get-matrix">cairo_get_matrix</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, <a href="cairo-cairo-matrix-t.html#cairo-matrix-t">cairo_matrix_t</a> *matrix);void <a href="cairo-Transformations.html#cairo-identity-matrix">cairo_identity_matrix</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr);void <a href="cairo-Transformations.html#cairo-user-to-device">cairo_user_to_device</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *x, double *y);void <a href="cairo-Transformations.html#cairo-user-to-device-distance">cairo_user_to_device_distance</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *dx, double *dy);void <a href="cairo-Transformations.html#cairo-device-to-user">cairo_device_to_user</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *x, double *y);void <a href="cairo-Transformations.html#cairo-device-to-user-distance">cairo_device_to_user_distance</a> (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *dx, double *dy);</pre></div><div class="refsect1" lang="en"><a name="desc"></a><h2>Description</h2><p></p></div><div class="refsect1" lang="en"><a name="details"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id2537554"></a><h3><a name="cairo-translate"></a>cairo_translate ()</h3><a class="indexterm" name="id2537566"></a><pre class="programlisting">void cairo_translate (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double tx, double ty);</pre></div><hr><div class="refsect2" lang="en"><a name="id2537603"></a><h3><a name="cairo-scale"></a>cairo_scale ()</h3><a class="indexterm" name="id2537615"></a><pre class="programlisting">void cairo_scale (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double sx, double sy);</pre></div><hr><div class="refsect2" lang="en"><a name="id2537652"></a><h3><a name="cairo-rotate"></a>cairo_rotate ()</h3><a class="indexterm" name="id2537664"></a><pre class="programlisting">void cairo_rotate (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double angle);</pre></div><hr><div class="refsect2" lang="en"><a name="id2537694"></a><h3><a name="cairo-transform"></a>cairo_transform ()</h3><a class="indexterm" name="id2537707"></a><pre class="programlisting">void cairo_transform (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, const <a href="cairo-cairo-matrix-t.html#cairo-matrix-t">cairo_matrix_t</a> *matrix);</pre></div><hr><div class="refsect2" lang="en"><a name="id2537738"></a><h3><a name="cairo-set-matrix"></a>cairo_set_matrix ()</h3><a class="indexterm" name="id2537750"></a><pre class="programlisting">void cairo_set_matrix (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, const <a href="cairo-cairo-matrix-t.html#cairo-matrix-t">cairo_matrix_t</a> *matrix);</pre></div><hr><div class="refsect2" lang="en"><a name="id2537782"></a><h3><a name="cairo-get-matrix"></a>cairo_get_matrix ()</h3><a class="indexterm" name="id2537794"></a><pre class="programlisting">void cairo_get_matrix (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, <a href="cairo-cairo-matrix-t.html#cairo-matrix-t">cairo_matrix_t</a> *matrix);</pre></div><hr><div class="refsect2" lang="en"><a name="id2533738"></a><h3><a name="cairo-identity-matrix"></a>cairo_identity_matrix ()</h3><a class="indexterm" name="id2533750"></a><pre class="programlisting">void cairo_identity_matrix (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr);</pre></div><hr><div class="refsect2" lang="en"><a name="id2533774"></a><h3><a name="cairo-user-to-device"></a>cairo_user_to_device ()</h3><a class="indexterm" name="id2533785"></a><pre class="programlisting">void cairo_user_to_device (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *x, double *y);</pre></div><hr><div class="refsect2" lang="en"><a name="id2533822"></a><h3><a name="cairo-user-to-device-distance"></a>cairo_user_to_device_distance ()</h3><a class="indexterm" name="id2533834"></a><pre class="programlisting">void cairo_user_to_device_distance (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *dx, double *dy);</pre></div><hr><div class="refsect2" lang="en"><a name="id2533871"></a><h3><a name="cairo-device-to-user"></a>cairo_device_to_user ()</h3><a class="indexterm" name="id2533882"></a><pre class="programlisting">void cairo_device_to_user (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *x, double *y);</pre></div><hr><div class="refsect2" lang="en"><a name="id2533920"></a><h3><a name="cairo-device-to-user-distance"></a>cairo_device_to_user_distance ()</h3><a class="indexterm" name="id2533932"></a><pre class="programlisting">void cairo_device_to_user_distance (<a href="cairo-cairo-t.html#cairo-t">cairo_t</a> *cr, double *dx, double *dy);</pre></div></div></div></body></html>⌨️ 快捷键说明
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