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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.14 $ -->
<refentry xml:id="function.imagearc" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>imagearc</refname>
<refpurpose>Draws an arc</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>imagearc</methodname>
<methodparam><type>resource</type><parameter>image</parameter></methodparam>
<methodparam><type>int</type><parameter>cx</parameter></methodparam>
<methodparam><type>int</type><parameter>cy</parameter></methodparam>
<methodparam><type>int</type><parameter>width</parameter></methodparam>
<methodparam><type>int</type><parameter>height</parameter></methodparam>
<methodparam><type>int</type><parameter>start</parameter></methodparam>
<methodparam><type>int</type><parameter>end</parameter></methodparam>
<methodparam><type>int</type><parameter>color</parameter></methodparam>
</methodsynopsis>
<para>
<function>imagearc</function> draws an arc of circle centered at the given
coordinates.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
&gd.image.description;
<varlistentry>
<term><parameter>cx</parameter></term>
<listitem>
<para>
x-coordinate of the center.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>cy</parameter></term>
<listitem>
<para>
y-coordinate of the center.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>width</parameter></term>
<listitem>
<para>
The arc width.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>height</parameter></term>
<listitem>
<para>
The arc height.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>start</parameter></term>
<listitem>
<para>
The arc start angle, in degrees.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>end</parameter></term>
<listitem>
<para>
The arc end angle, in degrees.
0° is located at the three-o'clock position, and the arc is drawn
clockwise.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>color</parameter></term>
<listitem>
<para>
A color identifier created with
<function>imagecolorallocate</function>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Drawing a circle with <function>imagearc</function></title>
<programlisting role="php">
<![CDATA[
<?php
// create a 200*200 image
$img = imagecreatetruecolor(200, 200);
// allocate some colors
$white = imagecolorallocate($img, 255, 255, 255);
$red = imagecolorallocate($img, 255, 0, 0);
$green = imagecolorallocate($img, 0, 255, 0);
$blue = imagecolorallocate($img, 0, 0, 255);
// draw the head
imagearc($img, 100, 100, 200, 200, 0, 360, $white);
// mouth
imagearc($img, 100, 100, 150, 150, 25, 155, $red);
// left and then the right eye
imagearc($img, 60, 75, 50, 50, 0, 360, $green);
imagearc($img, 140, 75, 50, 50, 0, 360, $blue);
// output image in the browser
header("Content-type: image/png");
imagepng($img);
// free memory
imagedestroy($img);
?>
]]>
</programlisting>
&example.outputs.similar;
<mediaobject>
<imageobject>
<imagedata fileref="figures/image.imagearc.png"/>
</imageobject>
</mediaobject>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>imagefilledarc</function></member>
<member><function>imageellipse</function></member>
<member><function>imagefilledellipse</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
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sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
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vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->
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