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<!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>画一椭圆弧且填充</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.imagefilledarc" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imagefilledarc</h1>
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<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imagefilledarc</span> — <span class="dc-title">画一椭圆弧且填充</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.imagefilledarc-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>imagefilledarc</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">$height</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$start</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$end</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$style</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">在指定的 <code class="parameter">image</code> 上画一椭圆弧且填充。</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.imagefilledarc-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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椭圆弧的宽度。
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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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椭圆弧的高度。
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</p>
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</dd>
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<dt>
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<code class="parameter">start</code></dt>
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<dd>
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<p class="para">
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起点角度。
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</p>
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</dd>
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<dt>
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<code class="parameter">end</code></dt>
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<dd>
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<p class="para">
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终点角度。
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0° is located at the three-o'clock position, and the arc is drawn
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clockwise.
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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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<span class="function"><a href="imagecolorallocate.html" class="function">imagecolorallocate()</a></span> 创建的颜色标识符。
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</p>
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</dd>
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<dt>
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<code class="parameter">style</code></dt>
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<dd>
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<p class="para">
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值可以是下列值的按位或（OR）：
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<ol type="1">
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<li class="listitem"><span class="simpara"><strong><code>IMG_ARC_PIE</code></strong></span></li>
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<li class="listitem"><span class="simpara"><strong><code>IMG_ARC_CHORD</code></strong></span></li>
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<li class="listitem"><span class="simpara"><strong><code>IMG_ARC_NOFILL</code></strong></span></li>
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<li class="listitem"><span class="simpara"><strong><code>IMG_ARC_EDGED</code></strong></span></li>
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</ol>
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<strong><code>IMG_ARC_PIE</code></strong> 和 <strong><code>IMG_ARC_CHORD</code></strong>
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是互斥的；<strong><code>IMG_ARC_CHORD</code></strong>
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只是用直线连接了起始和结束点，<strong><code>IMG_ARC_PIE</code></strong>
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则产生圆形边界。<strong><code>IMG_ARC_NOFILL</code></strong>
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指明弧或弦只有轮廓，不填充。<strong><code>IMG_ARC_EDGED</code></strong>
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指明用直线将起始和结束点与中心点相连，和 <strong><code>IMG_ARC_NOFILL</code></strong>
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一起使用是画饼状图轮廓的好方法（而不用填充）。
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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.imagefilledarc-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.imagefilledarc-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-3694">
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<p><strong>Example #1 创建一 3D 效果的饼状图</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">// 创建图像<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">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 分配一些颜色<br /></span><span style="color: #0000BB">$white </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0xFF</span><span style="color: #007700">, </span><span style="color: #0000BB">0xFF</span><span style="color: #007700">, </span><span style="color: #0000BB">0xFF</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$gray </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0xC0</span><span style="color: #007700">, </span><span style="color: #0000BB">0xC0</span><span style="color: #007700">, </span><span style="color: #0000BB">0xC0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$darkgray </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0x90</span><span style="color: #007700">, </span><span style="color: #0000BB">0x90</span><span style="color: #007700">, </span><span style="color: #0000BB">0x90</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$navy </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">, </span><span style="color: #0000BB">0x80</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$darknavy </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">, </span><span style="color: #0000BB">0x50</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$red </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0xFF</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$darkred </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">0x90</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">, </span><span style="color: #0000BB">0x00</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 创建 3D 效果<br /></span><span style="color: #007700">for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">60</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">> </span><span style="color: #0000BB">50</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">--) {<br /> </span><span style="color: #0000BB">imagefilledarc</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">$darknavy</span><span style="color: #007700">, </span><span style="color: #0000BB">IMG_ARC_PIE</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">imagefilledarc</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">75 </span><span style="color: #007700">, </span><span style="color: #0000BB">$darkgray</span><span style="color: #007700">, </span><span style="color: #0000BB">IMG_ARC_PIE</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">imagefilledarc</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">75</span><span style="color: #007700">, </span><span style="color: #0000BB">360 </span><span style="color: #007700">, </span><span style="color: #0000BB">$darkred</span><span style="color: #007700">, </span><span style="color: #0000BB">IMG_ARC_PIE</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">imagefilledarc</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">$navy</span><span style="color: #007700">, </span><span style="color: #0000BB">IMG_ARC_PIE</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagefilledarc</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">45</span><span style="color: #007700">, </span><span style="color: #0000BB">75 </span><span style="color: #007700">, </span><span style="color: #0000BB">$gray</span><span style="color: #007700">, </span><span style="color: #0000BB">IMG_ARC_PIE</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagefilledarc</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">75</span><span style="color: #007700">, </span><span style="color: #0000BB">360 </span><span style="color: #007700">, </span><span style="color: #0000BB">$red</span><span style="color: #007700">, </span><span style="color: #0000BB">IMG_ARC_PIE</span><span style="color: #007700">);<br /><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">$image</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$image</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="mediaobject">
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<div class="imageobject">
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<img src="images/21009b70229598c6a80eef8b45bf282b-imagefilledarc.png" alt="例子输出：创建一 3D 效果的饼状图" width="100" height="100" />
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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.imagefilledarc-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数需要 GD 2.0.1 或更高版本(推荐 2.0.28 及更高版本)。</span></p></blockquote>
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</div>
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</div></div></div></body></html> |