mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-10-06 18:12:22 +02:00
73 lines
1.9 KiB
PHP
73 lines
1.9 KiB
PHP
<?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 '".$$name."' for $name, should be something like #80FFFF' !!!");
|
|
|
|
$$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);
|