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