mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-11-25 09:23:28 +01:00
73 lines
1.9 KiB
PHP
73 lines
1.9 KiB
PHP
<?php
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/**
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* eGroupWare Calendar: rounded corners
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*
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* @link http://www.egroupware.org
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @package calendar
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* @copyright (c) 2004-9 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @version $Id$
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*/
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include_once('../../phpgwapi/inc/common_functions.inc.php');
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check_load_extension('gd',true); // true = throw exception if not loadable
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foreach(array('width'=>1,'height'=>1,'color1'=>'000080','color2'=>'ffffff') as $name => $default)
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{
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$$name = isset($_GET[$name]) ? $_GET[$name] : $default;
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}
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foreach(array('color1','color2') as $name)
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{
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preg_match('/^#?([0-9A-Fa-f]{2})([0-9A-Fa-f]{2})([0-9A-Fa-f]{2})$/',$$name,$rgb) or
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die("Wrong value '".htmlspecialchars($$name)."' for $name, should be something like #80FFFF' !!!");
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$$name = array('r'=>hexdec($rgb[1]),'g'=>hexdec($rgb[2]),'b'=>hexdec($rgb[3]));
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}
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$image = @imagecreate(abs($width),abs($height))
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or die("Cannot Initialize new GD image stream");
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$length = max($width,$height);
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$dist = $length / 256;
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if ($dist < 1) $dist = 1;
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$anz = round($length / $dist);
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foreach ($color1 as $c => $val)
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{
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$c_step[$c] = ($color2[$c] - $val) / $anz;
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}
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$rgb = $color1;
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for ($l = 0; $l < $length; $l += $dist)
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{
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$color = imagecolorallocate($image,(int)$rgb['r'],(int)$rgb['g'],(int)$rgb['b']);
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foreach($rgb as $c => $val)
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{
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$rgb[$c] += $c_step[$c];
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}
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if ($width > $height)
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{
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imagefilledrectangle($image,(int)$l,0,(int) ($l+$dist),$height-1,$color);
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}
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else
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{
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imagefilledrectangle($image,0,(int)$l,$width-1,(int) ($l+$dist),$color);
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}
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}
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// allow caching for 7 days
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header('Cache-Control: public');
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header('Expires: ' . gmdate('D, d M Y H:i:s', time()+7*24*60*60) . ' GMT');
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if (function_exists('imagegif'))
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{
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header("Content-type: image/gif");
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imagegif($image);
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}
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else
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{
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header("Content-type: image/png");
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imagepng($image);
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}
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imagedestroy($image);
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