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<div id="imagick.scaleimage" class="refentry">
<div class="refnamediv">
<h1 class="refname">Imagick::scaleImage</h1>
<p class="verinfo">(PECL imagick 2, PECL imagick 3)</p><p class="refpurpose"><span class="refname">Imagick::scaleImage</span> — <span class="dc-title">Scales the size of an image</span></p>
</div>
<div class="refsect1 description" id="refsect1-imagick.scaleimage-description">
<h3 class="title">说明</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="methodname"><strong>Imagick::scaleImage</strong></span>(<br> <span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$columns</code></span>,<br> <span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$rows</code></span>,<br> <span class="methodparam"><span class="type"><a href="language.types.boolean.php" class="type bool">bool</a></span> <code class="parameter">$bestfit</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong></span></span>,<br> <span class="methodparam"><span class="type"><a href="language.types.boolean.php" class="type bool">bool</a></span> <code class="parameter">$legacy</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong></span></span><br>): <span class="type"><a href="language.types.boolean.php" class="type bool">bool</a></span></div>
<p class="para rdfs-comment">
Scales the size of an image to the given dimensions. The other parameter
will be calculated if 0 is passed as either param.
</p>
<blockquote class="note"><p><strong class="note">注意</strong>:
<span class="simpara">
参数 <code class="parameter">bestfit</code> 的特性在 Imagick 3.0.0 中已改变。在此版本以前，当目标尺寸设为
400x400 时，原尺寸为 200x150 的图像将不会被改变。自 Imagick 3.0.0
起，源图像将会被放大到 400x300 因为这将更好的适合目标尺寸。当使用参数
<code class="parameter">bestfit</code> 时，必须同时给出宽度和高度。
</span>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-imagick.scaleimage-parameters">
<h3 class="title">参数</h3>
<p class="para">
<dl>
<dt><code class="parameter">columns</code></dt>
<dd>
<p class="para">
</p>
</dd>
<dt><code class="parameter">rows</code></dt>
<dd>
<p class="para">
</p>
</dd>
<dt><code class="parameter">bestfit</code></dt>
<dd>
<p class="para">
</p>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagick.scaleimage-returnvalues">
<h3 class="title">返回值</h3>
<p class="para">
成功时返回 <strong><code><a href="reserved.constants.php#constant.true">true</a></code></strong>。
</p>
</div>
<div class="refsect1 errors" id="refsect1-imagick.scaleimage-errors">
<h3 class="title">错误／异常</h3>
<p class="para">
错误时抛出 ImagickException。
</p>
</div>
<div class="refsect1 changelog" id="refsect1-imagick.scaleimage-changelog">
<h3 class="title">更新日志</h3>
<p class="para">
<table class="doctable informaltable">
<thead>
<tr>
<th>版本</th>
<th>说明</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>PECL imagick 2.1.0</td>
<td>
Added optional fit parameter. This method now supports proportional scaling.
Pass zero as either parameter for proportional scaling.
</td>
</tr>
</tbody>
</table>
</p>
</div>
<div class="refsect1 examples" id="refsect1-imagick.scaleimage-examples">
<h3 class="title">示例</h3>
<p class="para">
<div class="example" id="example-3059">
<p><strong>示例 #1 <span class="function"><strong>Imagick::scaleImage()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">scaleImage</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$imagick </span><span style="color: #007700">= new </span><span style="color: #0000BB">\Imagick</span><span style="color: #007700">(</span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #0000BB">$imagePath</span><span style="color: #007700">));<br /> </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">scaleImage</span><span style="color: #007700">(</span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-Type: image/jpg"</span><span style="color: #007700">);<br /> echo </span><span style="color: #0000BB">$imagick</span><span style="color: #007700">-></span><span style="color: #0000BB">getImageBlob</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #0000BB">?></span></span></code></div>
</div>
</div>
</p>
</div>
</div><?php manual_footer($setup); ?>