📄 function.imagecopymergegray.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Copy and merge part of an image with gray scale</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagecopymerge.html">imagecopymerge</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagecopyresampled.html">imagecopyresampled</a></div> <div class="up"><a href="ref.image.html">GD Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.imagecopymergegray" class="refentry"> <div class="refnamediv"> <h1 class="refname">imagecopymergegray</h1> <p class="verinfo">(PHP 4 >= 4.0.6, PHP 5)</p><p class="refpurpose"><span class="refname">imagecopymergegray</span> — <span class="dc-title">Copy and merge part of an image with gray scale</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>imagecopymergegray</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$dst_im</tt></span> , <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$src_im</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$dst_x</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$dst_y</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$src_x</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$src_y</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$src_w</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$src_h</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$pct</tt></span> )</div> <p class="para rdfs-comment"> <b>imagecopymergegray()</b> copy a part of <i><tt class="parameter">src_im</tt></i> onto <i><tt class="parameter">dst_im</tt></i> starting at the x,y coordinates <i><tt class="parameter">src_x</tt></i>, <i><tt class="parameter">src_y </tt></i> with a width of <i><tt class="parameter">src_w</tt></i> and a height of <i><tt class="parameter">src_h</tt></i>. The portion defined will be copied onto the x,y coordinates, <i><tt class="parameter">dst_x</tt></i> and <i><tt class="parameter">dst_y</tt></i>. </p> <p class="para"> This function is identical to <a href="function.imagecopymerge.html" class="function">imagecopymerge()</a> except that when merging it preserves the hue of the source by converting the destination pixels to gray scale before the copy operation. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">dst_im</tt></i></span> <dd> <p class="para"> Destination image link resource. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">src_im</tt></i></span> <dd> <p class="para"> Source image link resource. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">dst_x</tt></i></span> <dd> <p class="para"> x-coordinate of destination point. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">dst_y</tt></i></span> <dd> <p class="para"> y-coordinate of destination point. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">src_x</tt></i></span> <dd> <p class="para"> x-coordinate of source point. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">src_y</tt></i></span> <dd> <p class="para"> y-coordinate of source point. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">src_w</tt></i></span> <dd> <p class="para"> Source width. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">src_h</tt></i></span> <dd> <p class="para"> Source height. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">pct</tt></i></span> <dd> <p class="para"> The <i><tt class="parameter">src_im</tt></i> will be changed to grayscale according to <i><tt class="parameter">pct</tt></i> where 0 is fully grayscale and 100 is unchanged. When <i><tt class="parameter">pct</tt></i> = 100 this function behaves identically to <a href="function.imagecopy.html" class="function">imagecopy()</a> for pallete images, while it implements alpha transparency for true colour images. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>imagecopymergegray()</b> usage</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Create image instances<br /></span><span style="color: #0000BB">$dest </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatefromgif</span><span style="color: #007700">(</span><span style="color: #DD0000">'php.gif'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$src </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatefromgif</span><span style="color: #007700">(</span><span style="color: #DD0000">'php.gif'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Copy and merge - Gray = 20%<br /></span><span style="color: #0000BB">imagecopymergegray</span><span style="color: #007700">(</span><span style="color: #0000BB">$dest</span><span style="color: #007700">, </span><span style="color: #0000BB">$src</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">47</span><span style="color: #007700">, </span><span style="color: #0000BB">20</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Output and free free from memory<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-Type: image/gif'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagegif</span><span style="color: #007700">(</span><span style="color: #0000BB">$dest</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$dest</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$src</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagecopymerge.html">imagecopymerge</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagecopyresampled.html">imagecopyresampled</a></div> <div class="up"><a href="ref.image.html">GD Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -