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<?php /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: / // {{{ Header /* * This is a driver file contains the Image_Tools_Mask class. * * PHP versions 4 and 5 * * LICENSE: * Copyright (c) 2005-2008 Firman Wandayandi <firman@php.net> * * This source file is subject to the BSD License license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://www.opensource.org/licenses/bsd-license.php * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to pear-dev@list.php.net so we can send you a copy immediately. * * @category Images * @package Image_Tools * @author Firman Wandayandi <firman@php.net> * @copyright Copyright (c) 2005-2008 Firman Wandayandi <firman@php.net> * @license http://www.opensource.org/licenses/bsd-license.php * BSD License * @version CVS: $Id: Mask.php,v 1.4 2008/05/26 06:32:15 firman Exp $ / // }}} // {{{ Dependencies /* * Image_Tools / require_once 'Image/Tools.php'; /* * Image_Color * Notes: conflict with Image_Color v1.0.0 / require_once 'Image/Color.php'; // }}} // {{{ Class: Image_Tools_Mask /* * This class provide masking tool for manipulating an image. * * @category Images * @package Image_Tools * @author Firman Wandayandi <firman@php.net> * @copyright Copyright (c) 2005-2008 Firman Wandayandi <firman@php.net> * @license http://www.opensource.org/licenses/bsd-license.php * BSD License * @version Release: 1.0.0RC1 / class Image_Tools_Mask extends Image_Tools { // {{{ Properties /* * Mask options: * <pre> * image mixed Destination image, a filename or an image string * data or a GD image resource. * mask mixed Mask image, a filename or an image string * data or a GD image resource. * sample mixed Sample image, a filename or an image string * data or a GD image resource. * mask_color mixed Mask color, use string for hexa color format or * array contains 3 indexes 0 for RGB format * unmask_color mixed Mask color, use string for hexa color format or * array contains 3 indexes 0 for RGB format * antialias bool Flag whether attempt to draw antialias mask * antialias_factor int Antialias factor, this setting for antialias * mask * </pre> * * @var array * @access protected / var $options = array( 'image' => null, // Destination image. 'mask' => null, // Mask image. 'sample' => null, // Sample image. 'mask_color' => '000000', // Mask color. 'unmask_color' => 'ffffff', // Unmask color. 'antialias' => true, // Antialias flag. 'antialias_factor' => 16 // Antialias factor. ); /* * Available options for Image_Tools_Mask. * * @var array * @access protected / var $availableOptions = array( 'image' => 'mixed', 'mask' => 'mixed', 'sample' => 'mixed', 'mask_color' => 'mixed', 'unmask_color' => 'mixed', 'antialias' => 'bool', 'antialias_factor' => 'int' ); /* * There is no public methods in Image_Tool_Mask. * * @var array * @access protected / var $availableMethods = array(); /* * Image_Tools_Mask API version. * * @var string * @access protected / var $version = '1.0'; /* * GD image resource for mask image. * * @var resource * @access private / var $_maskImage; /* * GD image resource for sample image. * * @var resource * @access private / var $_sampleImage; // }}} // {{{ preRender() /* * Function which called before render. * * @return bool\|PEAR_Error TRUE on success or PEAR_Error on failure. * @access protected * @see Image_Tools::createImage() / function preRender() { $res = Image_Tools::createImage($this->options['mask']); if (PEAR::isError($res)) { return $res; } $this->_maskImage = $res; $res = Image_Tools::createImage($this->options['sample']); if (PEAR::isError($res)) { return $res; } $this->_sampleImage = $res; $res = Image_Tools::createImage($this->options['image']); if (PEAR::isError($res)) { return $res; } $this->resultImage = $res; return true; } // }}} // {{{ render() /* * Apply tools to image. * * This function scan for mask color and closes colors position, grab color * at found the position on sample image, then set the pixel color at the same * position on destination image. * * @return bool\|PEAR_Error TRUE on success or PEAR_Error on failure. * @access private * @see Image_Tools_Mask::_getNearestColors() / function render() { if (!Image_Tools::isGDImageResource($this->_maskImage)) { return PEAR::raiseError('Invalid image resource Image_Tools_Mask::$_maskImage'); } if (!Image_Tools::isGDImageResource($this->_sampleImage)) { return PEAR::raiseError('Invalid image resource Image_Tools_Mask::$_sampleImage'); } if (!Image_Tools::isGDImageResource($this->resultImage)) { return PEAR::raiseError('Invalid image resource Image_Tools_Mask::$_resultImage'); } $maskWidth = imagesx($this->_maskImage); $maskHeight = imagesy($this->_maskImage); $sampleWidth = imagesx($this->_sampleImage); $sampleHeight = imagesy($this->_sampleImage); if ($this->options['antialias']) { $closesColors = $this->_getNearestColors(); } else { $closesColors = array($this->options['maskColor']); } imagealphablending($this->resultImage, true); // scan for mask color or closes colors position for ($x = 0; $x < $maskWidth; $x++) { for ($y = 0; $y < $maskHeight; $y++) { if ($x >= $sampleWidth \|\| $y >= $sampleHeight) { continue; } // grab color at x, y and convert to hex color format $index = imagecolorat($this->_maskImage, $x, $y); $maskRGBA = imagecolorsforindex($this->_maskImage, $index); $maskColor = Image_Color::rgb2hex(array_values($maskRGBA)); // check color in closes colors collection if (in_array($maskColor, $closesColors)) { // grab color at x, y from sample image $index = imagecolorat($this->_sampleImage, $x, $y); $sampleRGBA = imagecolorsforindex($this->_sampleImage, $index); // allocate color on destination image $color = imagecolorresolvealpha($this->resultImage, $sampleRGBA['red'], $sampleRGBA['green'], $sampleRGBA['blue'], $sampleRGBA['alpha']); // set a pixel color at destination image imagesetpixel($this->resultImage, $x, $y, $color); } } } return true; } // }}} // {{{ _getNearestColors /* * Get nearest colors between mask color and unmask color using * antialias factor. * * @return array Colors range. * @access private / function _getNearestColors() { $imcolor = new Image_Color; $imcolor->setColors($this->options['mask_color'], $this->options['unmask_color']); return $imcolor->getRange($this->options['antialias_factor']); } // }}} } // }}} / * Local variables: * mode: php * tab-width: 4 * c-basic-offset: 4 * c-hanging-comment-ender-p: nil * End: */ ?>

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