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142 lines
5.2 KiB
HTML
142 lines
5.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>取得与给定颜色最接近的色度的黑白色的索引</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.imagecolorclosesthwb" class="refentry">
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<div class="refnamediv"> <h1 class="refname">imagecolorclosesthwb</h1>
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<p class="verinfo">(PHP 4 >= 4.0.1, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imagecolorclosesthwb</span> — <span class="dc-title">
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取得与给定颜色最接近的色度的黑白色的索引
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.imagecolorclosesthwb-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>imagecolorclosesthwb</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$red</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$green</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$blue</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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取得与给定颜色最接近的色度的黑白色的索引。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.imagecolorclosesthwb-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">image</code></dt>
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<dd>
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<p class="para">由图象创建函数(例如<span class="function"><a href="imagecreatetruecolor.html" class="function">imagecreatetruecolor()</a></span>)返回的图象资源。</p></dd>
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<dt>
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<code class="parameter">red</code></dt>
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<dd>
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<p class="para">红色成分的值。</p>
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</dd>
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<dt>
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<code class="parameter">green</code></dt>
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<dd>
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<p class="para">绿色成分的值。</p>
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</dd>
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<dt>
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<code class="parameter">blue</code></dt>
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<dd>
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<p class="para">蓝色成分的值。</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.imagecolorclosesthwb-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回一个整数，是给定颜色最接近的色度的黑白色的索引。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.imagecolorclosesthwb-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-3666">
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<p><strong>Example #1 使用 <span class="function"><strong>imagecolorclosesthwb()</strong></span> 的例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$im </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatefromgif</span><span style="color: #007700">(</span><span style="color: #DD0000">'php.gif'</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">'HWB: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">imagecolorclosesthwb</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">116</span><span style="color: #007700">, </span><span style="color: #0000BB">115</span><span style="color: #007700">, </span><span style="color: #0000BB">152</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程的输出类似于：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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HWB: 33
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.imagecolorclosesthwb-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.3.0</td>
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<td>
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在 Windows 平台上可用
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.imagecolorclosesthwb-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="imagecolorclosest.html" class="function" rel="rdfs-seeAlso">imagecolorclosest()</a> - 取得与指定的颜色最接近的颜色的索引值</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |