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diff --git a/admin/survey/export/libs/PHPPowerPoint/Shared/Font.php b/admin/survey/export/libs/PHPPowerPoint/Shared/Font.php
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+++ b/admin/survey/export/libs/PHPPowerPoint/Shared/Font.php
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+<?php
+/**
+ * PHPPowerPoint
+ *
+ * Copyright (c) 2009 - 2010 PHPPowerPoint
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category   PHPPowerPoint
+ * @package    PHPPowerPoint_Shared
+ * @copyright  Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
+ * @version    0.1.0, 2009-04-27
+ */
+
+
+/**
+ * PHPPowerPoint_Shared_Font
+ *
+ * @category   PHPPowerPoint
+ * @package    PHPPowerPoint_Shared
+ * @copyright  Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
+ */
+class PHPPowerPoint_Shared_Font
+{
+	/**
+	 * Calculate an (approximate) pixel size, based on a font points size
+	 *
+	 * @param 	int		$fontSizeInPoints	Font size (in points)
+	 * @return 	int		Font size (in pixels)
+	 */
+	public static function fontSizeToPixels($fontSizeInPoints = 12) {
+		return ((16 / 12) * $fontSizeInPoints);
+	}
+	
+	/**
+	 * Calculate an (approximate) pixel size, based on inch size
+	 *
+	 * @param 	int		$sizeInInch	Font size (in inch)
+	 * @return 	int		Size (in pixels)
+	 */
+	public static function inchSizeToPixels($sizeInInch = 1) {
+		return ($sizeInInch * 96);
+	}
+	
+	/**
+	 * Calculate an (approximate) pixel size, based on centimeter size
+	 *
+	 * @param 	int		$sizeInCm	Font size (in centimeters)
+	 * @return 	int		Size (in pixels)
+	 */
+	public static function centimeterSizeToPixels($sizeInCm = 1) {
+		return ($sizeInCm * 37.795275591);
+	}
+}