svggradient.php
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svggradient.php
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	<?php

	/**
	* Render SVG gradients for IE 9
	*
	* Copyright (c) 2012, The Roundcube Dev Team
	*
	* The contents are subject to the Creative Commons Attribution-ShareAlike
	* License. It is allowed to copy, distribute, transmit and to adapt the work
	* by keeping credits to the original autors in the README file.
	* See http://creativecommons.org/licenses/by-sa/3.0/ for details.
	*/

	ini_set('error_reporting', E_ALL &~ (E_NOTICE \| E_STRICT));

	header('Content-Type: image/svg+xml');
	header("Expires: ".gmdate("D, d M Y H:i:s", time()+864000)." GMT");
	header("Cache-Control: max-age=864000");
	header("Pragma: ");

	$svg_stops = '';
	$color_stops = explode(';', preg_replace('/[^a-f0-9,;%]/i', '', $_GET['c']));
	$gradient_coords = !empty($_GET['h']) ? 'x1="0%" y1="0%" x2="100%" y2="0%"' : 'x1="0%" y1="0%" x2="0%" y2="100%"';
	$last = count($color_stops) - 1;
	foreach ($color_stops as $i => $stop) {
	list($color, $offset) = explode(',', $stop);
	if ($offset)
	$offset = intval($offset);
	else
	$offset = $i == $last ? 100 : 0;

	$svg_stops .= '<stop offset="' . $offset . '%" stop-color="#' . $color . '" stop-opacity="1"/>';
	}

	?>
	<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none" version="1.0" width="100%" height="100%">
	<defs>
	<linearGradient id="LG1" <?php echo $gradient_coords; ?> spreadMethod="pad">
	<?php echo $svg_stops; ?>
	</linearGradient>
	</defs>
	<rect width="100%" height="100%" style="fill:url(#LG1);"/>
	</svg>