library/Zend/Measure/Lightness.php

   1 <?php
   2 /**
   3  * Zend Framework
   4  *
   5  * LICENSE
   6  *
   7  * This source file is subject to the new BSD license that is bundled
   8  * with this package in the file LICENSE.txt.
   9  * It is also available through the world-wide-web at this URL:
  10  * http://framework.zend.com/license/new-bsd
  11  * If you did not receive a copy of the license and are unable to
  12  * obtain it through the world-wide-web, please send an email
  13  * to license@zend.com so we can send you a copy immediately.
  14  *
  15  * @category  Zend
  16  * @package   Zend_Measure
  17  * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  18  * @license   http://framework.zend.com/license/new-bsd     New BSD License
  19  * @version   $Id$
  20  */
  21
  22 /**
  23  * Implement needed classes
  24  */
  25 require_once 'Zend/Measure/Abstract.php';
  26 require_once 'Zend/Locale.php';
  27
  28 /**
  29  * Class for handling temperature conversions
  30  *
  31  * @category   Zend
  32  * @package    Zend_Measure
  33  * @subpackage Zend_Measure_Lightness
  34  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  35  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  36  */
  37 class Zend_Measure_Lightness extends Zend_Measure_Abstract
  38 {
  39     const STANDARD = 'CANDELA_PER_SQUARE_METER';
  40
  41     const APOSTILB                          = 'APOSTILB';
  42     const BLONDEL                           = 'BLONDEL';
  43     const CANDELA_PER_SQUARE_CENTIMETER     = 'CANDELA_PER_SQUARE_CENTIMETER';
  44     const CANDELA_PER_SQUARE_FOOT           = 'CANDELA_PER_SQUARE_FOOT';
  45     const CANDELA_PER_SQUARE_INCH           = 'CANDELA_PER_SQUARE_INCH';
  46     const CANDELA_PER_SQUARE_METER          = 'CANDELA_PER_SQUARE_METER';
  47     const FOOTLAMBERT                       = 'FOOTLAMBERT';
  48     const KILOCANDELA_PER_SQUARE_CENTIMETER = 'KILOCANDELA_PER_SQUARE_CENTIMETER';
  49     const KILOCANDELA_PER_SQUARE_FOOT       = 'KILOCANDELA_PER_SQUARE_FOOT';
  50     const KILOCANDELA_PER_SQUARE_INCH       = 'KILOCANDELA_PER_SQUARE_INCH';
  51     const KILOCANDELA_PER_SQUARE_METER      = 'KILOCANDELA_PER_SQUARE_METER';
  52     const LAMBERT                           = 'LAMBERT';
  53     const MILLILAMBERT                      = 'MILLILAMBERT';
  54     const NIT                               = 'NIT';
  55     const STILB                             = 'STILB';
  56
  57     /**
  58      * Calculations for all lightness units
  59      *
  60      * @var array
  61      */
  62     protected $_units = array(
  63         'APOSTILB'                      => array('0.31830989',   'asb'),
  64         'BLONDEL'                       => array('0.31830989',   'blondel'),
  65         'CANDELA_PER_SQUARE_CENTIMETER' => array('10000',        'cd/cm²'),
  66         'CANDELA_PER_SQUARE_FOOT'       => array('10.76391',     'cd/ft²'),
  67         'CANDELA_PER_SQUARE_INCH'       => array('1550.00304',   'cd/in²'),
  68         'CANDELA_PER_SQUARE_METER'      => array('1',            'cd/m²'),
  69         'FOOTLAMBERT'                   => array('3.4262591',    'ftL'),
  70         'KILOCANDELA_PER_SQUARE_CENTIMETER' => array('10000000', 'kcd/cm²'),
  71         'KILOCANDELA_PER_SQUARE_FOOT'   => array('10763.91',     'kcd/ft²'),
  72         'KILOCANDELA_PER_SQUARE_INCH'   => array('1550003.04',   'kcd/in²'),
  73         'KILOCANDELA_PER_SQUARE_METER'  => array('1000',         'kcd/m²'),
  74         'LAMBERT'                       => array('3183.0989',    'L'),
  75         'MILLILAMBERT'                  => array('3.1830989',    'mL'),
  76         'NIT'                           => array('1',            'nt'),
  77         'STILB'                         => array('10000',        'sb'),
  78         'STANDARD'                      => 'CANDELA_PER_SQUARE_METER'
  79     );
  80 }