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PHP Script  |  2008-07-02  |  4.5 KB  |  149 lines
  1. <?php
  2.  
  3. /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
  4.  
  5. /**
  6.  * Image_Graph - PEAR PHP OO Graph Rendering Utility.
  7.  *
  8.  * PHP versions 4 and 5
  9.  *
  10.  * LICENSE: This library is free software; you can redistribute it and/or modify
  11.  * it under the terms of the GNU Lesser General Public License as published by
  12.  * the Free Software Foundation; either version 2.1 of the License, or (at your
  13.  * option) any later version. This library is distributed in the hope that it
  14.  * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  15.  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
  16.  * General Public License for more details. You should have received a copy of
  17.  * the GNU Lesser General Public License along with this library; if not, write
  18.  * to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19.  * 02111-1307 USA
  20.  *
  21.  * @category   Images
  22.  * @package    Image_Graph
  23.  * @subpackage Fill
  24.  * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  25.  * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  26.  * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  27.  * @version    CVS: $Id: Gradient.php,v 1.15 2005/08/24 20:36:03 nosey Exp $
  28.  * @link       http://pear.php.net/package/Image_Graph
  29.  */
  30.  
  31. /**
  32.  * Include file Image/Graph/Fill/Image.php
  33.  */
  34. require_once 'Image/Graph/Fill/Image.php';
  35.  
  36. /**
  37.  * Fill using a gradient color.
  38.  * This creates a scaled fillstyle with colors flowing gradiently between 2
  39.  * specified RGB values. Several directions are supported:
  40.  *
  41.  * 1 Vertically (IMAGE_GRAPH_GRAD_VERTICAL)
  42.  *
  43.  * 2 Horizontally (IMAGE_GRAPH_GRAD_HORIZONTAL)
  44.  *
  45.  * 3 Mirrored vertically (the color grades from a- b-a vertically)
  46.  * (IMAGE_GRAPH_GRAD_VERTICAL_MIRRORED)
  47.  *
  48.  * 4 Mirrored horizontally (the color grades from a-b-a horizontally)
  49.  * IMAGE_GRAPH_GRAD_HORIZONTAL_MIRRORED
  50.  *
  51.  * 5 Diagonally from top-left to right-bottom
  52.  * (IMAGE_GRAPH_GRAD_DIAGONALLY_TL_BR)
  53.  *
  54.  * 6 Diagonally from bottom-left to top-right
  55.  * (IMAGE_GRAPH_GRAD_DIAGONALLY_BL_TR)
  56.  *
  57.  * 7 Radially (concentric circles in the center) (IMAGE_GRAPH_GRAD_RADIAL)
  58.  *
  59.  * @category   Images
  60.  * @package    Image_Graph
  61.  * @subpackage Fill
  62.  * @author     Jesper Veggerby <pear.nosey@veggerby.dk>
  63.  * @copyright  Copyright (C) 2003, 2004 Jesper Veggerby Hansen
  64.  * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
  65.  * @version    Release: 0.7.2
  66.  * @link       http://pear.php.net/package/Image_Graph
  67.  */
  68. class Image_Graph_Fill_Gradient extends Image_Graph_Fill //Image_Graph_Fill_Image
  69. {
  70.  
  71.     /**
  72.      * The direction of the gradient
  73.      * @var int
  74.      * @access private
  75.      */
  76.     var $_direction;
  77.  
  78.     /**
  79.      * The first color to gradient
  80.      * @var mixed
  81.      * @access private
  82.      */
  83.     var $_startColor;
  84.  
  85.     /**
  86.      * The last color to gradient
  87.      * @var mixed
  88.      * @access private
  89.      */
  90.     var $_endColor;
  91.  
  92.     /**
  93.      * Image_Graph_GradientFill [Constructor]
  94.      *
  95.      * @param int $direction The direction of the gradient
  96.      * @param mixed $startColor The value of the starting color
  97.      * @param mixed $endColor The value of the ending color
  98.      */
  99.     function Image_Graph_Fill_Gradient($direction, $startColor, $endColor)
  100.     {
  101.         parent::Image_Graph_Fill();
  102.         $this->_direction = $direction;
  103.         $this->_startColor = $startColor;
  104.         $this->_endColor = $endColor;
  105.     }
  106.  
  107.     /**
  108.      * Return the fillstyle
  109.      *
  110.      * @return int A GD fillstyle
  111.      * @access private
  112.      */
  113.     function _getFillStyle($ID = false)
  114.     {
  115.         switch ($this->_direction) {
  116.             case IMAGE_GRAPH_GRAD_HORIZONTAL:
  117.                 $direction = 'horizontal';
  118.                 break;
  119.             case IMAGE_GRAPH_GRAD_VERTICAL:
  120.                 $direction = 'vertical';
  121.                 break;
  122.             case IMAGE_GRAPH_GRAD_HORIZONTAL_MIRRORED:
  123.                 $direction = 'horizontal_mirror';
  124.                 break;
  125.             case IMAGE_GRAPH_GRAD_VERTICAL_MIRRORED:
  126.                 $direction = 'vertical_mirror';
  127.                 break;
  128.             case IMAGE_GRAPH_GRAD_DIAGONALLY_TL_BR:
  129.                 $direction = 'diagonal_tl_br';
  130.                 break;
  131.             case IMAGE_GRAPH_GRAD_DIAGONALLY_BL_TR:
  132.                 $direction = 'diagonal_bl_tr';
  133.                 break;
  134.             case IMAGE_GRAPH_GRAD_RADIAL:
  135.                 $direction = 'radial';
  136.                 break;
  137.         }
  138.         
  139.         return array(
  140.             'type' => 'gradient',
  141.             'start' => $this->_startColor,
  142.             'end' => $this->_endColor,
  143.             'direction' => $direction
  144.         );
  145.     }
  146.  
  147. }
  148.  
  149. ?>