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157 lines
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HTML
157 lines
7.5 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>画一个椭圆</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.imageellipse" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imageellipse</h1>
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<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imageellipse</span> — <span class="dc-title">画一个椭圆</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.imageellipse-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>imageellipse</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$cx</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$cy</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$width</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$height</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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在指定的坐标上画一个椭圆。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.imageellipse-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">cx</code></dt>
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<dd>
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<p class="para">
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中间的 X 坐标。
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</p>
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</dd>
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<dt>
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<code class="parameter">cy</code></dt>
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<dd>
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<p class="para">
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中间的 Y 坐标。
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</p>
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</dd>
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<dt>
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<code class="parameter">width</code></dt>
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<dd>
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<p class="para">
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椭圆的宽度。
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</p>
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</dd>
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<dt>
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<code class="parameter">height</code></dt>
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<dd>
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<p class="para">
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椭圆的高度。
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</p>
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</dd>
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<dt>
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<code class="parameter">color</code></dt>
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<dd>
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<p class="para">
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椭圆的颜色。颜色标识符由
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<span class="function"><a href="imagecolorallocate.html" class="function">imagecolorallocate()</a></span> 创建。
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</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.imageellipse-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.imageellipse-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-3692">
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<p><strong>Example #1 <span class="function"><strong>imageellipse()</strong></span> 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 /><br /></span><span style="color: #FF8000">// 新建一个空白图像<br /></span><span style="color: #0000BB">$image </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">400</span><span style="color: #007700">, </span><span style="color: #0000BB">300</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 填充背景色<br /></span><span style="color: #0000BB">$bg </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 选择椭圆的颜色<br /></span><span style="color: #0000BB">$col_ellipse </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 画一个椭圆<br /></span><span style="color: #0000BB">imageellipse</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">300</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">$col_ellipse</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 输出图像<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-type: image/png"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">);<br /><br /><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="mediaobject">
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<div class="imageobject">
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<img src="images/21009b70229598c6a80eef8b45bf282b-imageellipse.png" alt="例子输出： imageellipse()" width="400" height="300" />
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</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 notes" id="refsect1-function.imageellipse-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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本函数需要 GD 2.0.2 或更高版本。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.imageellipse-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="imagefilledellipse.html" class="function" rel="rdfs-seeAlso">imagefilledellipse()</a> - 画一椭圆并填充</span></li>
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<li class="member"><span class="function"><a href="imagearc.html" class="function" rel="rdfs-seeAlso">imagearc()</a> - 画椭圆弧</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> |