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113 lines
6.3 KiB
HTML
113 lines
6.3 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>新建一个真彩色图像</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.imagecreatetruecolor" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imagecreatetruecolor</h1>
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<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imagecreatetruecolor</span> — <span class="dc-title">新建一个真彩色图像</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.imagecreatetruecolor-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>imagecreatetruecolor</strong></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="type">resource</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>imagecreatetruecolor()</strong></span> 返回一个图像标识符，代表了一幅大小为
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<code class="parameter">x_size</code> 和 <code class="parameter">y_size</code> 的黑色图像。
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</p>
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<p class="para">
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是否定义了本函数取决于 PHP 和 GD 的版本。从 PHP 4.0.6 到 4.1.x
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只要加载了 GD 模块本函数一直存在，但是在没有安装 GD2 的时候调用，PHP
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将发出致命错误并退出。在 PHP 4.2.x 中此行为改为发出警告而不是错误。其它版本只在安装了正确的
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GD 版本时定义了本函数。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.imagecreatetruecolor-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">width</code></dt>
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<dd>
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<p class="para">
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图像宽度。
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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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图像高度。
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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.imagecreatetruecolor-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">成功后返回图象资源,失败后返回 <strong><code>FALSE</code></strong> 。</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.imagecreatetruecolor-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-3689">
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<p><strong>Example #1
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新建一个新的 GD 图像流并输出图像
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</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 />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">$im </span><span style="color: #007700">= @</span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">120</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">)<br /> or die(</span><span style="color: #DD0000">'Cannot Initialize new GD image stream'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$text_color </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">233</span><span style="color: #007700">, </span><span style="color: #0000BB">14</span><span style="color: #007700">, </span><span style="color: #0000BB">91</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagestring</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #DD0000">'A Simple Text String'</span><span style="color: #007700">, </span><span style="color: #0000BB">$text_color</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<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="mediaobject">
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<div class="imageobject">
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<img src="images/21009b70229598c6a80eef8b45bf282b-imagecreatetruecolor.png" alt="例子的输出： 新建一个新的 GD 图像流并输出图像" width="120" height="20" />
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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.imagecreatetruecolor-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 class="refsect1 seealso" id="refsect1-function.imagecreatetruecolor-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="imagedestroy.html" class="function" rel="rdfs-seeAlso">imagedestroy()</a> - 销毁一图像</span></li>
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<li class="member"><span class="function"><a href="imagecreate.html" class="function" rel="rdfs-seeAlso">imagecreate()</a> - 新建一个基于调色板的图像</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> |