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98 lines
6.2 KiB
HTML
98 lines
6.2 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>载入一新字体</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.imageloadfont" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imageloadfont</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imageloadfont</span> — <span class="dc-title">载入一新字体</span></p>
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</div>
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<div class="refsect1 unknown-unknown-noteu" id="refsect1-function.imageloadfont-unknown-unknown-noteu">
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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>imageloadfont</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$file</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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<span class="function"><strong>imageloadfont()</strong></span>
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加载一个用户定义的位图字体并返回该字体的标识符（其值总是大于
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5，因此不会和内置字体冲突）。
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在产生错误的情况下，该函数返回 <strong><code>FALSE</code></strong> 。
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</p>
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<p class="para">
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字体文件格式目前是二进制的且和平台有关。这意味着应该用和你运行
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PHP 的机器相同类型 CPU 的机器生成字体。
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</p>
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<p class="para">
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<table class="doctable table">
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<caption><strong>字体文件格式</strong></caption>
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<thead>
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<tr>
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<th>字节位置</th>
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<th>C 数据类型</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>byte 0-3</td>
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<td>int</td>
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<td>字体中的字符数目</td>
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</tr>
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<tr>
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<td>byte 4-7</td>
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<td>int</td>
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<td>字体中第一个字符的值（通常是 32 代表空格）</td>
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</tr>
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<tr>
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<td>byte 8-11</td>
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<td>int</td>
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<td>每个字符宽度的像素值</td>
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</tr>
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<tr>
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<td>byte 12-15</td>
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<td>int</td>
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<td>每个字符高度的像素值</td>
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</tr>
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<tr>
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<td>byte 16-</td>
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<td>char</td>
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<td>字符数据的数组，每字符中每像素一字节，一共 (nchars*width*height) 字节。</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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<p class="para">
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<div class="example" id="example-3722">
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<p><strong>Example #1 使用 imageloadfont</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">50</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$black </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">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 /></span><span style="color: #0000BB">$white </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</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 /></span><span style="color: #0000BB">imagefilledrectangle</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">49</span><span style="color: #007700">, </span><span style="color: #0000BB">19</span><span style="color: #007700">, </span><span style="color: #0000BB">$white</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$font </span><span style="color: #007700">= </span><span style="color: #0000BB">imageloadfont</span><span style="color: #007700">(</span><span style="color: #DD0000">"04b.gdf"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagestring</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #DD0000">"Hello"</span><span style="color: #007700">, </span><span style="color: #0000BB">$black</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">?></span>
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</span>
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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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<p class="para">
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参见 <span class="function"><a href="imagefontwidth.html" class="function">imagefontwidth()</a></span> 和
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<span class="function"><a href="imagefontheight.html" class="function">imagefontheight()</a></span>。
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</p>
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</div>
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</div></div></div></body></html> |