system/libraries/Image_lib.php

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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Image Manipulation class
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Image_lib
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/libraries/image_lib.html
 */
class CI_Image_lib {

	var $image_library		= 'gd2';	// Can be:  imagemagick, netpbm, gd, gd2
	var $library_path		= '';
	var $dynamic_output		= FALSE;	// Whether to send to browser or write to disk
	var $source_image		= '';
	var $new_image			= '';
	var $width				= '';
	var $height				= '';
	var $quality			= '90';
	var $create_thumb		= FALSE;
	var $thumb_marker		= '_thumb';
	var $maintain_ratio		= TRUE;		// Whether to maintain aspect ratio when resizing or use hard values
	var $master_dim			= 'auto';	// auto, height, or width.  Determines what to use as the master dimension
	var $rotation_angle		= '';
	var $x_axis				= '';
	var	$y_axis				= '';

	// Watermark Vars
	var $wm_text			= '';			// Watermark text if graphic is not used
	var $wm_type			= 'text';		// Type of watermarking.  Options:  text/overlay
	var $wm_x_transp		= 4;
	var $wm_y_transp		= 4;
	var $wm_overlay_path	= '';			// Watermark image path
	var $wm_font_path		= '';			// TT font
	var $wm_font_size		= 17;			// Font size (different versions of GD will either use points or pixels)
	var $wm_vrt_alignment	= 'B';			// Vertical alignment:   T M B
	var $wm_hor_alignment	= 'C';			// Horizontal alignment: L R C
	var $wm_padding			= 0;			// Padding around text
	var $wm_hor_offset		= 0;			// Lets you push text to the right
	var $wm_vrt_offset		= 0;			// Lets you push  text down
	var $wm_font_color		= '#ffffff';	// Text color
	var $wm_shadow_color	= '';			// Dropshadow color
	var $wm_shadow_distance	= 2;			// Dropshadow distance
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