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1 <?php
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2
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3 /**
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4 * Render SVG gradients for IE 9
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5 *
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6 * Copyright (c) 2012, The Roundcube Dev Team
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7 *
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8 * The contents are subject to the Creative Commons Attribution-ShareAlike
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9 * License. It is allowed to copy, distribute, transmit and to adapt the work
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10 * by keeping credits to the original autors in the README file.
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11 * See http://creativecommons.org/licenses/by-sa/3.0/ for details.
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12 */
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13
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14 ini_set('error_reporting', E_ALL &~ (E_NOTICE | E_STRICT));
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15
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16 header('Content-Type: image/svg+xml');
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17 header("Expires: ".gmdate("D, d M Y H:i:s", time()+864000)." GMT");
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18 header("Cache-Control: max-age=864000");
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19 header("Pragma: ");
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20
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21 $svg_stops = '';
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22 $color_stops = explode(';', preg_replace('/[^a-f0-9,;%]/i', '', $_GET['c']));
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23 $gradient_coords = !empty($_GET['h']) ? 'x1="0%" y1="0%" x2="100%" y2="0%"' : 'x1="0%" y1="0%" x2="0%" y2="100%"';
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24 $last = count($color_stops) - 1;
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25 foreach ($color_stops as $i => $stop) {
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26 list($color, $offset) = explode(',', $stop);
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27 if ($offset)
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28 $offset = intval($offset);
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29 else
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30 $offset = $i == $last ? 100 : 0;
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31
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32 $svg_stops .= '<stop offset="' . $offset . '%" stop-color="#' . $color . '" stop-opacity="1"/>';
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33 }
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34
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35 ?>
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36 <svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none" version="1.0" width="100%" height="100%">
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37 <defs>
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38 <linearGradient id="LG1" <?php echo $gradient_coords; ?> spreadMethod="pad">
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39 <?php echo $svg_stops; ?>
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40 </linearGradient>
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41 </defs>
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42 <rect width="100%" height="100%" style="fill:url(#LG1);"/>
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43 </svg>
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