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<refentry xml:id="function.imagewbmp" xmlns="http://docbook.org/ns/docbook">

<refnamediv>

<refname>imagewbmp</refname>

<refpurpose>&gd.image.output;</refpurpose>

</refnamediv>

<refsect1 role="description">

&reftitle.description;

<methodsynopsis>

<type>bool</type><methodname>imagewbmp</methodname>

<methodparam><type>GdImage</type><parameter>image</parameter></methodparam>

<methodparam choice="opt"><type class="union"><type>resource</type><type>string</type><type>null</type></type><parameter>file</parameter><initializer>&null;</initializer></methodparam>

<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>foreground_color</parameter><initializer>&null;</initializer></methodparam>

</methodsynopsis>

<para>

<function>imagewbmp</function> 输出或保存为指定 <parameter>image</parameter> 的 <acronym>WBMP</acronym> 版本。

</para>

</refsect1>

<refsect1 role="parameters">

&reftitle.parameters;

<para>

<variablelist>

&gd.image.description;

<varlistentry>

<term><parameter>file</parameter></term>

<listitem>

<para>&gd.image.path;</para>

</listitem>

</varlistentry>

<varlistentry>

<term><parameter>foreground_color</parameter></term>

<listitem>

<para>

使用此参数从 <function>imagecolorallocate</function> 获得的标识符来设置前景色。默认前景色为黑色。

</para>

</listitem>

</varlistentry>

</variablelist>

</para>

</refsect1>

<refsect1 role="returnvalues">

&reftitle.returnvalues;

<para>

&return.success;

</para>

&gd.return.trueonerror;

</refsect1>

<refsect1 role="changelog">

&reftitle.changelog;

<informaltable>

<tgroup cols="2">

<thead>

<row>

<entry>&Version;</entry>

<entry>&Description;</entry>

</row>

</thead>

<tbody>

&gd.changelog.image-param;

<row>

<entry>8.0.0</entry>

<entry>

<parameter>foreground_color</parameter> 现在允许为 null。

</entry>

</row>

</tbody>

</tgroup>

</informaltable>

</refsect1>

<refsect1 role="examples">

&reftitle.examples;

<para>

<example>

<title>输出 WBMP 图像</title>

<programlisting role="php">

<![CDATA[

<?php

// 创建空白图像并添加文本

$im = imagecreatetruecolor(120, 20);

$text_color = imagecolorallocate($im, 233, 14, 91);

imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);

// 设置内容类型标头——在本例中是 image/vnd.wap.wbmp

// 提示，请参阅 image_type_to_mime_type() 了解内容类型

header('Content-Type: image/vnd.wap.wbmp');

// 输出图像

imagewbmp($im);

?>

]]>

</programlisting>

</example>

</para>

<para>

<example>

<title>保存 WBMP 图像</title>

<programlisting role="php">

<![CDATA[

<?php

// 创建空白图像并添加文本

$im = imagecreatetruecolor(120, 20);

$text_color = imagecolorallocate($im, 233, 14, 91);

imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);

// 保存图像

imagewbmp($im, 'simpletext.wbmp');

?>

]]>

</programlisting>

</example>

</para>

<para>

<example>

<title>使用不同的前景色输出图像</title>

<programlisting role="php">

<![CDATA[

<?php

// 创建空白图像并添加文本

$im = imagecreatetruecolor(120, 20);

$text_color = imagecolorallocate($im, 233, 14, 91);

imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);

// 设置内容类型标头——在本例中是 image/vnd.wap.wbmp

// 提示，请参阅 image_type_to_mime_type() 了解内容类型

header('Content-Type: image/vnd.wap.wbmp');

// 设置替换的前景色

$foreground_color = imagecolorallocate($im, 255, 0, 0);

imagewbmp($im, NULL, $foreground_color);

?>

]]>

</programlisting>

</example>

</para>

</refsect1>

<refsect1 role="seealso">

&reftitle.seealso;

<simplelist>

<member><function>image2wbmp</function></member>

<member><function>imagepng</function></member>

<member><function>imagegif</function></member>

<member><function>imagejpeg</function></member>

<member><function>imagetypes</function></member>

</simplelist>

</refsect1>

</refentry>

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