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<?php
/**
* Flush an image to the browser
*
* webtrees: Web based Family History software
* Copyright (C) 2010 webtrees development team.
*
* Derived from PhpGedView
* Copyright (C) 2002 to 2009 PGV Development Team. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* @package webtrees
* @subpackage Charts
* @version $Id$
*/
define('WT_SCRIPT_NAME', 'imageflush.php');
require './includes/session.php';
/**
* display any message as a PNG image
*
* @param string $txt message to be displayed
*/
function ImageFlushError($txt) {
Header('Content-Type: image/png');
$image = imagecreate (
safe_GET_integer('width', 100, 1000, 400),
safe_GET_integer('height', 40, 400, 100)
);
$bg = imagecolorallocate($image, 0xEE, 0xEE, 0xEE);
$red= Imagecolorallocate($image, 0xFF, 0x00, 0x00);
imagestring($image, 2, 10, 10, $txt, $red);
imagepng($image);
}
// Get image_type
$image_type=safe_GET('image_type', WT_REGEX_ALPHA, 'png');
if ($image_type=='jpg') {
$image_type='jpeg';
}
// Get name of SESSION variable containing an image file name
// These names are generated by WT
$tempVarName=safe_GET('image_name', WT_REGEX_ALPHANUM, 'graphFile');
// read image_data from SESSION variable or from file pointed to by SESSION variable
if (isset($_SESSION['image_data'])) {
$image_data=@$_SESSION['image_data'];
$image_data=@unserialize($image_data);
unset($_SESSION['image_data']);
} else {
if (isset($_SESSION[$tempVarName])) {
$image_data=file_get_contents($_SESSION[$tempVarName]);
unlink($_SESSION[$tempVarName]);
unset($_SESSION[$tempVarName]);
}
}
if (empty($image_data)) {
ImageFlushError('Error: $_SESSION["image_data"] or $_SESSION["'.$tempVarName.'"] is empty');
} else {
// send data to browser
header('Content-Type: image/'.$image_type);
header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
header('Expires: Thu, 19 Nov 1981 08:52:00 GMT');
header('Pragma: no-cache');
echo $image_data;
}
?>
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