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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=UTF-8">
<title>GOBezierSpline: GOffice Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="GOffice Reference Manual">
<link rel="up" href="ch10.html" title="Rendering utilities">
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<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#GOBezierSpline.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#GOBezierSpline.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
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</tr></table>
<div class="refentry">
<a name="GOBezierSpline"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GOBezierSpline.top_of_page"></a>GOBezierSpline</span></h2>
<p>GOBezierSpline</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GOBezierSpline.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GOBezierSpline.html#go-bezier-spline-destroy" title="go_bezier_spline_destroy ()">go_bezier_spline_destroy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GOBezierSpline.html" title="GOBezierSpline"><span class="returnvalue">GOBezierSpline</span></a> *
</td>
<td class="function_name">
<a class="link" href="GOBezierSpline.html#go-bezier-spline-init" title="go_bezier_spline_init ()">go_bezier_spline_init</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GOBezierSpline.html#go-bezier-spline-to-cairo" title="go_bezier_spline_to_cairo ()">go_bezier_spline_to_cairo</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GOPath.html" title="GOPath"><span class="returnvalue">GOPath</span></a> *
</td>
<td class="function_name">
<a class="link" href="GOBezierSpline.html#go-bezier-spline-to-path" title="go_bezier_spline_to_path ()">go_bezier_spline_to_path</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GOBezierSpline.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="GOBezierSpline.html#GOBezierSpline-struct" title="GOBezierSpline">GOBezierSpline</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GOBezierSpline.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GBoxed
    <span class="lineart">╰──</span> GOBezierSpline
</pre>
</div>
<div class="refsect1">
<a name="GOBezierSpline.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="GOBezierSpline.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="go-bezier-spline-destroy"></a><h3>go_bezier_spline_destroy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
go_bezier_spline_destroy (<em class="parameter"><code><a class="link" href="GOBezierSpline.html" title="GOBezierSpline"><span class="type">GOBezierSpline</span></a> *sp</code></em>);</pre>
<p>Destroys the given structures after cleaning all allocated fields.</p>
<div class="refsect3">
<a name="id-1.6.3.5.7.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>sp</p></td>
<td class="parameter_description"><p>a struct GOBezierSpline instance</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="go-bezier-spline-init"></a><h3>go_bezier_spline_init ()</h3>
<pre class="programlisting"><a class="link" href="GOBezierSpline.html" title="GOBezierSpline"><span class="returnvalue">GOBezierSpline</span></a> *
go_bezier_spline_init (<em class="parameter"><code><span class="type">double</span> const *x</code></em>,
                       <em class="parameter"><code><span class="type">double</span> const *y</code></em>,
                       <em class="parameter"><code><span class="type">int</span> n</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> closed</code></em>);</pre>
<p><em class="parameter"><code>x</code></em>
 and <em class="parameter"><code>y</code></em>
 values must be valid and finite. The returned structure
contains the x and y coordinates of all control points, including the
incoming data. the n and closed fields are just copies of the corresponding
arguments.</p>
<div class="refsect3">
<a name="id-1.6.3.5.7.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>x</p></td>
<td class="parameter_description"><p>the x values</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>y</p></td>
<td class="parameter_description"><p>the y values</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>the number of x and y values</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>closed</p></td>
<td class="parameter_description"><p>whether to return a closed curve or not</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.6.3.5.7.3.6"></a><h4>Returns</h4>
<p> a newly created struct GOBezierSpline instance which should be
destroyed by a call to go_bezier_spline_destroy.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="go-bezier-spline-to-cairo"></a><h3>go_bezier_spline_to_cairo ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
go_bezier_spline_to_cairo (<em class="parameter"><code><a class="link" href="GOBezierSpline.html" title="GOBezierSpline"><span class="type">GOBezierSpline</span></a> *sp</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a> *cr</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> horiz_flip</code></em>);</pre>
<p>Renders the spline in \a cr</p>
<div class="refsect3">
<a name="id-1.6.3.5.7.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>sp</p></td>
<td class="parameter_description"><p>a struct GOBezierSpline instance returned by go_bezier_spline_init</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cr</p></td>
<td class="parameter_description"><p>a cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>horiz_flip</p></td>
<td class="parameter_description"><p>whether to flip horizontally (for a RTL canvas).</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="go-bezier-spline-to-path"></a><h3>go_bezier_spline_to_path ()</h3>
<pre class="programlisting"><a class="link" href="GOPath.html" title="GOPath"><span class="returnvalue">GOPath</span></a> *
go_bezier_spline_to_path (<em class="parameter"><code><a class="link" href="GOBezierSpline.html" title="GOBezierSpline"><span class="type">GOBezierSpline</span></a> *sp</code></em>);</pre>
<p>Builds a GOPath using the control points evaluated in go_bezier_spline_init.</p>
<div class="refsect3">
<a name="id-1.6.3.5.7.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>sp</p></td>
<td class="parameter_description"><p>a struct GOBezierSpline instance returned by go_bezier_spline_init</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.6.3.5.7.5.6"></a><h4>Returns</h4>
<p> a newly created GOPath which should be destroyed by a call to
go_path_free.</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="GOBezierSpline.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GOBezierSpline-struct"></a><h3>GOBezierSpline</h3>
<pre class="programlisting">typedef struct {
	double *x, *y;
	int n;
	gboolean closed;
	/* private */
	unsigned ref_count;
} GOBezierSpline;
</pre>
<div class="refsect3">
<a name="id-1.6.3.5.8.2.4"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><span class="type">double</span> *<em class="structfield"><code><a name="GOBezierSpline-struct.x"></a>x</code></em>;</p></td>
<td class="struct_member_description"><p>control points abscissa.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">double</span> *<em class="structfield"><code><a name="GOBezierSpline-struct.y"></a>y</code></em>;</p></td>
<td class="struct_member_description"><p>control points ordinates.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="GOBezierSpline-struct.n"></a>n</code></em>;</p></td>
<td class="struct_member_description"><p>spline segments number.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GOBezierSpline-struct.closed"></a>closed</code></em>;</p></td>
<td class="struct_member_description"><p>whether the curve is closed.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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