Resources/PhpOffice/Common/Font.php

<?php
/**
 * This file is part of PHPOffice Common
 *
 * PHPOffice Common is free software distributed under the terms of the GNU Lesser
 * General Public License version 3 as published by the Free Software Foundation.
 *
 * For the full copyright and license information, please read the LICENSE
 * file that was distributed with this source code. For the full list of
 * contributors, visit https://github.com/PHPOffice/Common/contributors.
 *
 * @see        https://github.com/PHPOffice/Common
 *
 * @copyright   2009-2016 PHPOffice Common contributors
 * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
 */

namespace PhpOffice\Common;

/**
 * Font
 */
class Font
{
    /**
     * Calculate an (approximate) pixel size, based on a font points size
     *
     * @param int $fontSizeInPoints Font size (in points)
     *
     * @return float Font size (in pixels)
     */
    public static function fontSizeToPixels(int $fontSizeInPoints = 12): float
    {
        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(int $sizeInInch = 1): int
    {
        return $sizeInInch * 96;
    }

    /**
     * Calculate an (approximate) pixel size, based on centimeter size
     *
     * @param int $sizeInCm Font size (in centimeters)
     *
     * @return float Size (in pixels)
     */
    public static function centimeterSizeToPixels(int $sizeInCm = 1): float
    {
        return $sizeInCm * 37.795275591;
    }

    /**
     * Convert centimeter to twip
     *
     * @param int $sizeInCm
     *
     * @return float
     */
    public static function centimeterSizeToTwips(int $sizeInCm = 1): float
    {
        return $sizeInCm / 2.54 * 1440;
    }

    /**
     * Convert inch to twip
     *
     * @param int $sizeInInch
     *
     * @return int
     */
    public static function inchSizeToTwips(int $sizeInInch = 1): int
    {
        return $sizeInInch * 1440;
    }

    /**
     * Convert pixel to twip
     *
     * @param int $sizeInPixel
     *
     * @return float
     */
    public static function pixelSizeToTwips(int $sizeInPixel = 1): float
    {
        return $sizeInPixel / 96 * 1440;
    }

    /**
     * Calculate twip based on point size, used mainly for paragraph spacing
     *
     * @param int $sizeInPoint Size in point
     *
     * @return float Size (in twips)
     */
    public static function pointSizeToTwips(int $sizeInPoint = 1): float
    {
        return $sizeInPoint / 72 * 1440;
    }
}