📄 function.imagepsbbox.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Give the bounding box of a text rectangle using PostScript Type1 fonts</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.imagepolygon.html">imagepolygon</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagepsencodefont.html">imagepsencodefont</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.imagepsbbox" class="refentry"> <div class="refnamediv"> <h1 class="refname">imagepsbbox</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imagepsbbox</span> — <span class="dc-title">Give the bounding box of a text rectangle using PostScript Type1 fonts</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>imagepsbbox</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$text</tt></span> , <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$font</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$size</tt></span> )</div> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>imagepsbbox</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$text</tt></span> , <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$font</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$size</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$space</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$tightness</tt></span> , <span class="methodparam"><span class="type">float</span> <tt class="parameter">$angle</tt></span> )</div> <p class="para rdfs-comment"> Gives the bounding box of a text rectangle using PostScript Type1 fonts. </p> <p class="para"> The bounding box is calculated using information available from character metrics, and unfortunately tends to differ slightly from the results achieved by actually rasterizing the text. If the angle is 0 degrees, you can expect the text to need 1 pixel more to every direction. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">text</tt></i></span> <dd> <p class="para"> The text to be written. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">font_index</tt></i></span> <dd> <p class="para"> A font resource, returned by <a href="function.imagepsloadfont.html" class="function">imagepsloadfont()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">size</tt></i></span> <dd> <p class="para"> <i><tt class="parameter">size</tt></i> is expressed in pixels. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">space</tt></i></span> <dd> <p class="para"> Allows you to change the default value of a space in a font. This amount is added to the normal value and can also be negative. Expressed in character space units, where 1 unit is 1/1000th of an em-square. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">tightness</tt></i></span> <dd> <p class="para"> <i><tt class="parameter">tightness</tt></i> allows you to control the amount of white space between characters. This amount is added to the normal character width and can also be negative. Expressed in character space units, where 1 unit is 1/1000th of an em-square. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">angle</tt></i></span> <dd> <p class="para"> <i><tt class="parameter">angle</tt></i> is in degrees. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an array containing the following elements: <table class="informaltable"> <colgroup> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">0</td> <td colspan="1" rowspan="1" align="left">left x-coordinate</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">1</td> <td colspan="1" rowspan="1" align="left">upper y-coordinate</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">2</td> <td colspan="1" rowspan="1" align="left">right x-coordinate</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">3</td> <td colspan="1" rowspan="1" align="left">lower y-coordinate</td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <div class="example"> <p><b>Example #1 <b>imagepsbbox()</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 handle<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">200</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Allocate colors<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 /><br /></span><span style="color: #FF8000">// Load the PostScript Font<br /></span><span style="color: #0000BB">$font </span><span style="color: #007700">= </span><span style="color: #0000BB">imagepsloadfont</span><span style="color: #007700">(</span><span style="color: #DD0000">'font.pfm'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Make a bounding box for the font<br /></span><span style="color: #0000BB">$bbox </span><span style="color: #007700">= </span><span style="color: #0000BB">imagepsbbox</span><span style="color: #007700">(</span><span style="color: #DD0000">'Sample text is simple'</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #0000BB">12</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Define our X and Y cordinates<br /></span><span style="color: #0000BB">$x </span><span style="color: #007700">= (</span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">2</span><span style="color: #007700">] / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - </span><span style="color: #0000BB">10</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$y </span><span style="color: #007700">= (</span><span style="color: #0000BB">$bbox</span><span style="color: #007700">[</span><span style="color: #0000BB">3</span><span style="color: #007700">] / </span><span style="color: #0000BB">2</span><span style="color: #007700">) - </span><span style="color: #0000BB">10</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Write the font to the image<br /></span><span style="color: #0000BB">imagepstext</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #DD0000">'Sample text is simple'</span><span style="color: #007700">, </span><span style="color: #0000BB">$font</span><span style="color: #007700">, </span><span style="color: #0000BB">12</span><span style="color: #007700">, </span><span style="color: #0000BB">$black</span><span style="color: #007700">, </span><span style="color: #0000BB">$white</span><span style="color: #007700">, </span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Output and free memory<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-type: image/png'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$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></span></code></div> </div> </div> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: <span class="simpara">This function is only available if PHP is compiled using <span class="option">--with-t1lib[=DIR]</span>.</span></p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.imagepstext.html" class="function" rel="rdfs-seeAlso">imagepstext()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagepolygon.html">imagepolygon</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagepsencodefont.html">imagepsencodefont</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
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