/system/libraries/Image_lib.php

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    test
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application
    .htaccess
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        Check.php
        Systemid.php
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        error_404.php
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        english
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            system_lang.php
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            .gitattributes
            README.md
            calendar_lang.php
            date_lang.php
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            form_validation_lang.php
            ftp_lang.php
            imglib_lang.php
            index.html
            migration_lang.php
            number_lang.php
            pagination_lang.php
            profiler_lang.php
            system_lang.php
            unit_test_lang.php
            upload_lang.php
    libraries
        index.html
    logs
        index.html
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        System_model.php
        index.html
    third_party
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        components.php
        errors
            cli
                error_404.php
                error_db.php
                error_exception.php
                error_general.php
                error_php.php
                index.html
            html
                error_404.php
                error_db.php
                error_exception.php
                error_general.php
                error_php.php
                index.html
            index.html
        foot.php
        head.php
        index.html
        link
            archive.php
            archivereport.php
            check.php
            importlink.php
        login.php
        project
            add.php
            addlink.php
            details.php
            edit.php
            editlink.php
            show.php
        user
            changepassword.php
            editemail.php
            getpassword.php
            postpassword.php
            settings.php
        welcome_message.php
arial.ttf
captcha
    sys.txt
css
    bootstrap-theme.css
    bootstrap-theme.css.map
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favicon.ico
fonts
    glyphicons-halflings-regular.eot
    glyphicons-halflings-regular.svg
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hrefsystem.png
index.php
install.php
jquery-latest.min.js
js
    bootstrap.js
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    npm.js
library
    ajax-loader.gif
    crop
        Canvas.php
        Coordinate.php
        Exception.php
        Font
            GDF.php
            PS.php
            TTF.php
        Image.php
        Mapper
            BMP.php
            GD.php
            GD2.php
            GIF.php
            JPEG.php
            PNG.php
            TGA.php
        MapperFactory.php
        Operation
            AddNoise.php
            ApplyConvolution.php
            ApplyFilter.php
            ApplyMask.php
            AsGrayscale.php
            AsNegative.php
            AutoCrop.php
            CopyChannelsPalette.php
            CopyChannelsTrueColor.php
            CorrectGamma.php
            Crop.php
            Flip.php
            GetMask.php
            Merge.php
            Mirror.php
            Resize.php
            ResizeCanvas.php
            Rotate.php
            RoundCorners.php
            Unsharp.php
        OperationFactory.php
        PaletteImage.php
        README
        TrueColorImage.php
        VERSION
        WideImage.php
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        vendor
            de77
                BMP.php
                TGA.php
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        demo
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            emails.php
            emails.phps
            images
                Amsterdam Van-Gogh Museum.jpg
                Amsterdam.jpg
                Antwerpen Rubenshaus.jpg
                Antwerpen.jpg
                Appenzell.jpg
                Arnhem Historisches Museum.jpg
                Bled.jpg
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                BolognaFontanadelNettuno.jpg
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                BordeauxPlaceB.jpg
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                Bouillon.jpg
                Gent Hotel de Ville2.jpg
                Gent.jpg
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                Giessbachfaelle Brienz.jpg
                Giethoorn.jpg
                Gnesen.jpg
                Gornij Grad_KATHEDRALE.jpg
                Gossensass.jpg
                Grad_Burg Grad2.jpg
                GrandDixence.jpg
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                Groningen.jpg
                GrottenvonReclere.jpg
                Guebwiller.jpg
                Kamnik_Die Franziskaner Bibliothek.jpg
                Karlsbad Muehlbrunnkolonnade.jpg
                Kazimierz.jpg
                KirchbergAltesRathaus1.jpg
                KlagenfurtDom.jpg
                KleineMeerjungfreu.jpg
                LazienkiparkWarschau.jpg
                LeHavreHafen.jpg
                LeMans.jpg
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                Leeuwarden Fries Museum.jpg
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                Lelystad.jpg
                Lemmer.jpg
                Leper Halles aux draps.jpg
                Leuven Museum fuer Kirchenkunst.jpg
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                Luxemburg.jpg
                LuzernAltstadt.jpg
                LuzernPicassoMuseum.jpg
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                Maastricht Onze Lieve Vrou...jpg
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                Metlika_Bela Krajina Museum.jpg
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                MilanoDom.jpg
                MilazzoBurg.jpg
                Novo Mesto_Das Museum.jpg
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                OdenseeAndersen.jpg
                Olimje_Kirche und Apotheke in Olimje.jpg
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                OlympischesMuseumLausanne.jpg
                OrleansMaisonJeannedArc.jpg
                OrleansParcFloraldelaSource.jpg
                OstiaAntica.jpg
                Ostrow Tumski.jpg
                PoertschachSchlossLeonstain.jpg
                Portoroz.jpg
                Posen.jpg
                Postojna.jpg
                Prag Altstaedter Ring.jpg
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                SalzburgResidenz.jpg
                WienMuseumsQuartier.jpg
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            images.php
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            indicator.gif
            json.html
            localdata.js
            main.css
            search.php
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        jquery.autocomplete.css
        jquery.autocomplete.js
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        jquery.autocomplete.pack.js
        lib
            jquery.ajaxQueue.js
            jquery.bgiframe.min.js
            jquery.js
            thickbox-compressed.js
            thickbox.css
        todo
    jquery-ui-sliderAccess.js
    jquery-ui-timepicker-addon.css
    jquery-ui-timepicker-addon.js
    jquery-ui.css
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    jscolor
        arrow.gif
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        demo.html
        hs.png
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    style.css
script.js
stylesmenu.css
system
    .htaccess
    core
        Benchmark.php
        CodeIgniter.php
        Common.php
        Config.php
        Controller.php
        Exceptions.php
        Hooks.php
        Input.php
        Lang.php
        Loader.php
        Log.php
        Model.php
        Output.php
        Router.php
        Security.php
        URI.php
        Utf8.php
        compat
            hash.php
            index.html
            mbstring.php
            password.php
            standard.php
        index.html
    database
        DB.php
        DB_active_rec.php
        DB_cache.php
        DB_driver.php
        DB_forge.php
        DB_query_builder.php
        DB_result.php
        DB_utility.php
        drivers
            cubrid
                cubrid_driver.php
                cubrid_forge.php
                cubrid_result.php
                cubrid_utility.php
                index.html
            ibase
                ibase_driver.php
                ibase_forge.php
                ibase_result.php
                ibase_utility.php
                index.html
            index.html
            mssql
                index.html
                mssql_driver.php
                mssql_forge.php
                mssql_result.php
                mssql_utility.php
            mysql
                index.html
                mysql_driver.php
                mysql_forge.php
                mysql_result.php
                mysql_utility.php
            mysqli
                index.html
                mysqli_driver.php
                mysqli_forge.php
                mysqli_result.php
                mysqli_utility.php
            oci8
                index.html
                oci8_driver.php
                oci8_forge.php
                oci8_result.php
                oci8_utility.php
            odbc
                index.html
                odbc_driver.php
                odbc_forge.php
                odbc_result.php
                odbc_utility.php
            pdo
                index.html
                pdo_driver.php
                pdo_forge.php
                pdo_result.php
                pdo_utility.php
                subdrivers
                    index.html
                    pdo_4d_driver.php
                    pdo_4d_forge.php
                    pdo_cubrid_driver.php
                    pdo_cubrid_forge.php
                    pdo_dblib_driver.php
                    pdo_dblib_forge.php
                    pdo_firebird_driver.php
                    pdo_firebird_forge.php
                    pdo_ibm_driver.php
                    pdo_ibm_forge.php
                    pdo_informix_driver.php
                    pdo_informix_forge.php
                    pdo_mysql_driver.php
                    pdo_mysql_forge.php
                    pdo_oci_driver.php
                    pdo_oci_forge.php
                    pdo_odbc_driver.php
                    pdo_odbc_forge.php
                    pdo_pgsql_driver.php
                    pdo_pgsql_forge.php
                    pdo_sqlite_driver.php
                    pdo_sqlite_forge.php
                    pdo_sqlsrv_driver.php
                    pdo_sqlsrv_forge.php
            postgre
                index.html
                postgre_driver.php
                postgre_forge.php
                postgre_result.php
                postgre_utility.php
            sqlite
                index.html
                sqlite_driver.php
                sqlite_forge.php
                sqlite_result.php
                sqlite_utility.php
            sqlite3
                index.html
                sqlite3_driver.php
                sqlite3_forge.php
                sqlite3_result.php
                sqlite3_utility.php
            sqlsrv
                index.html
                sqlsrv_driver.php
                sqlsrv_forge.php
                sqlsrv_result.php
                sqlsrv_utility.php
        index.html
    fonts
        index.html
        texb.ttf
    helpers
        array_helper.php
        captcha_helper.php
        cookie_helper.php
        date_helper.php
        directory_helper.php
        download_helper.php
        email_helper.php
        file_helper.php
        form_helper.php
        html_helper.php
        index.html
        inflector_helper.php
        language_helper.php
        number_helper.php
        path_helper.php
        security_helper.php
        smiley_helper.php
        string_helper.php
        text_helper.php
        typography_helper.php
        url_helper.php
        xml_helper.php
    index.html
    language
        english
            calendar_lang.php
            date_lang.php
            db_lang.php
            email_lang.php
            form_validation_lang.php
            ftp_lang.php
            imglib_lang.php
            index.html
            migration_lang.php
            number_lang.php
            pagination_lang.php
            profiler_lang.php
            unit_test_lang.php
            upload_lang.php
        index.html
    libraries
        Cache
            Cache.php
            drivers
                Cache_apc.php
                Cache_dummy.php
                Cache_file.php
                Cache_memcached.php
                Cache_redis.php
                Cache_wincache.php
                index.html
            index.html
        Calendar.php
        Cart.php
        Driver.php
        Email.php
        Encrypt.php
        Encryption.php
        Form_validation.php
        Ftp.php
        Image_lib.php
        Javascript
            Jquery.php
            index.html
        Javascript.php
        Log.php
        Migration.php
        Pagination.php
        Parser.php
        Profiler.php
        Session
            Session.php
            SessionHandlerInterface.php
            Session_driver.php
            drivers
                Session_database_driver.php
                Session_files_driver.php
                Session_memcached_driver.php
                Session_redis_driver.php
                index.html
            index.html
        Session.php
        Sha1.php
        Table.php
        Trackback.php
        Typography.php
        Unit_test.php
        Upload.php
        User_agent.php
        Xmlrpc.php
        Xmlrpcs.php
        Zip.php
        index.html
uploads
    sys.txt
<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2016, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2016, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

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

	/**
	 * PHP extension/library to use for image manipulation
	 * Can be: imagemagick, netpbm, gd, gd2
	 *
	 * @var string
	 */
	public $image_library		= 'gd2';

	/**
	 * Path to the graphic library (if applicable)
	 *
	 * @var string
	 */
	public $library_path		= '';

	/**
	 * Whether to send to browser or write to disk
	 *
	 * @var bool
	 */
	public $dynamic_output		= FALSE;

	/**
	 * Path to original image
	 *
	 * @var string
	 */
	public $source_image		= '';

	/**
	 * Path to the modified image
	 *
	 * @var string
	 */
	public $new_image		= '';

	/**
	 * Image width
	 *
	 * @var int
	 */
	public $width			= '';

	/**
	 * Image height
	 *
	 * @var int
	 */
	public $height			= '';

	/**
	 * Quality percentage of new image
	 *
	 * @var int
	 */
	public $quality			= 90;

	/**
	 * Whether to create a thumbnail
	 *
	 * @var bool
	 */
	public $create_thumb		= FALSE;

	/**
	 * String to add to thumbnail version of image
	 *
	 * @var string
	 */
	public $thumb_marker		= '_thumb';

	/**
	 * Whether to maintain aspect ratio when resizing or use hard values
	 *
	 * @var bool
	 */
	public $maintain_ratio		= TRUE;

	/**
	 * auto, height, or width.  Determines what to use as the master dimension
	 *
	 * @var string
	 */
	public $master_dim		= 'auto';

	/**
	 * Angle at to rotate image
	 *
	 * @var string
	 */
	public $rotation_angle		= '';

	/**
	 * X Coordinate for manipulation of the current image
	 *
	 * @var int
	 */
	public $x_axis			= '';

	/**
	 * Y Coordinate for manipulation of the current image
	 *
	 * @var int
	 */
	public $y_axis			= '';

	// --------------------------------------------------------------------------
	// Watermark Vars
	// --------------------------------------------------------------------------

	/**
	 * Watermark text if graphic is not used
	 *
	 * @var string
	 */
	public $wm_text			= '';

	/**
	 * Type of watermarking.  Options:  text/overlay
	 *
	 * @var string
	 */
	public $wm_type			= 'text';

	/**
	 * Default transparency for watermark
	 *
	 * @var int
	 */
	public $wm_x_transp		= 4;

	/**
	 * Default transparency for watermark
	 *
	 * @var int
	 */
	public $wm_y_transp		= 4;

	/**
	 * Watermark image path
	 *
	 * @var string
	 */
	public $wm_overlay_path		= '';

	/**
	 * TT font
	 *
	 * @var string
	 */
	public $wm_font_path		= '';

	/**
	 * Font size (different versions of GD will either use points or pixels)
	 *
	 * @var int
	 */
	public $wm_font_size		= 17;

	/**
	 * Vertical alignment:   T M B
	 *
	 * @var string
	 */
	public $wm_vrt_alignment	= 'B';

	/**
	 * Horizontal alignment: L R C
	 *
	 * @var string
	 */
	public $wm_hor_alignment	= 'C';

	/**
	 * Padding around text
	 *
	 * @var int
	 */
	public $wm_padding			= 0;

	/**
	 * Lets you push text to the right
	 *
	 * @var int
	 */
	public $wm_hor_offset		= 0;

	/**
	 * Lets you push text down
	 *
	 * @var int
	 */
	public $wm_vrt_offset		= 0;

	/**
	 * Text color
	 *
	 * @var string
	 */
	protected $wm_font_color	= '#ffffff';

	/**
	 * Dropshadow color
	 *
	 * @var string
	 */
	protected $wm_shadow_color	= '';

	/**
	 * Dropshadow distance
	 *
	 * @var int
	 */
	public $wm_shadow_distance	= 2;

	/**
	 * Image opacity: 1 - 100  Only works with image
	 *
	 * @var int
	 */
	public $wm_opacity		= 50;

	// --------------------------------------------------------------------------
	// Private Vars
	// --------------------------------------------------------------------------

	/**
	 * Source image folder
	 *
	 * @var string
	 */
	public $source_folder		= '';

	/**
	 * Destination image folder
	 *
	 * @var string
	 */
	public $dest_folder		= '';

	/**
	 * Image mime-type
	 *
	 * @var string
	 */
	public $mime_type		= '';

	/**
	 * Original image width
	 *
	 * @var int
	 */
	public $orig_width		= '';

	/**
	 * Original image height
	 *
	 * @var int
	 */
	public $orig_height		= '';

	/**
	 * Image format
	 *
	 * @var string
	 */
	public $image_type		= '';

	/**
	 * Size of current image
	 *
	 * @var string
	 */
	public $size_str		= '';

	/**
	 * Full path to source image
	 *
	 * @var string
	 */
	public $full_src_path		= '';

	/**
	 * Full path to destination image
	 *
	 * @var string
	 */
	public $full_dst_path		= '';

	/**
	 * File permissions
	 *
	 * @var	int
	 */
	public $file_permissions = 0644;

	/**
	 * Name of function to create image
	 *
	 * @var string
	 */
	public $create_fnc		= 'imagecreatetruecolor';

	/**
	 * Name of function to copy image
	 *
	 * @var string
	 */
	public $copy_fnc		= 'imagecopyresampled';

	/**
	 * Error messages
	 *
	 * @var array
	 */
	public $error_msg		= array();

	/**
	 * Whether to have a drop shadow on watermark
	 *
	 * @var bool
	 */
	protected $wm_use_drop_shadow	= FALSE;

	/**
	 * Whether to use truetype fonts
	 *
	 * @var bool
	 */
	public $wm_use_truetype	= FALSE;

	/**
	 * Initialize Image Library
	 *
	 * @param	array	$props
	 * @return	void
	 */
	public function __construct($props = array())
	{
		if (count($props) > 0)
		{
			$this->initialize($props);
		}

		log_message('info', 'Image Lib Class Initialized');
	}

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

	/**
	 * Initialize image properties
	 *
	 * Resets values in case this class is used in a loop
	 *
	 * @return	void
	 */
	public function clear()
	{
		$props = array('thumb_marker', 'library_path', 'source_image', 'new_image', 'width', 'height', 'rotation_angle', 'x_axis', 'y_axis', 'wm_text', 'wm_overlay_path', 'wm_font_path', 'wm_shadow_color', 'source_folder', 'dest_folder', 'mime_type', 'orig_width', 'orig_height', 'image_type', 'size_str', 'full_src_path', 'full_dst_path');

		foreach ($props as $val)
		{
			$this->$val = '';
		}

		$this->image_library 		= 'gd2';
		$this->dynamic_output 		= FALSE;
		$this->quality 				= 90;
		$this->create_thumb 		= FALSE;
		$this->thumb_marker 		= '_thumb';
		$this->maintain_ratio 		= TRUE;
		$this->master_dim 			= 'auto';
		$this->wm_type 				= 'text';
		$this->wm_x_transp 			= 4;
		$this->wm_y_transp 			= 4;
		$this->wm_font_size 		= 17;
		$this->wm_vrt_alignment 	= 'B';
		$this->wm_hor_alignment 	= 'C';
		$this->wm_padding 			= 0;
		$this->wm_hor_offset 		= 0;
		$this->wm_vrt_offset 		= 0;
		$this->wm_font_color		= '#ffffff';
		$this->wm_shadow_distance 	= 2;
		$this->wm_opacity 			= 50;
		$this->create_fnc 			= 'imagecreatetruecolor';
		$this->copy_fnc 			= 'imagecopyresampled';
		$this->error_msg 			= array();
		$this->wm_use_drop_shadow 	= FALSE;
		$this->wm_use_truetype 		= FALSE;
	}

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

	/**
	 * initialize image preferences
	 *
	 * @param	array
	 * @return	bool
	 */
	public function initialize($props = array())
	{
		// Convert array elements into class variables
		if (count($props) > 0)
		{
			foreach ($props as $key => $val)
			{
				if (property_exists($this, $key))
				{
					if (in_array($key, array('wm_font_color', 'wm_shadow_color')))
					{
						if (preg_match('/^#?([0-9a-f]{3}|[0-9a-f]{6})$/i', $val, $matches))
						{
							/* $matches[1] contains our hex color value, but it might be
							 * both in the full 6-length format or the shortened 3-length
							 * value.
							 * We'll later need the full version, so we keep it if it's
							 * already there and if not - we'll convert to it. We can
							 * access string characters by their index as in an array,
							 * so we'll do that and use concatenation to form the final
							 * value:
							 */
							$val = (strlen($matches[1]) === 6)
								? '#'.$matches[1]
								: '#'.$matches[1][0].$matches[1][0].$matches[1][1].$matches[1][1].$matches[1][2].$matches[1][2];
						}
						else
						{
							continue;
						}
					}

					$this->$key = $val;
				}
			}
		}

		// Is there a source image? If not, there's no reason to continue
		if ($this->source_image === '')
		{
			$this->set_error('imglib_source_image_required');
			return FALSE;
		}

		/* Is getimagesize() available?
		 *
		 * We use it to determine the image properties (width/height).
		 * Note: We need to figure out how to determine image
		 * properties using ImageMagick and NetPBM
		 */
		if ( ! function_exists('getimagesize'))
		{
			$this->set_error('imglib_gd_required_for_props');
			return FALSE;
		}

		$this->image_library = strtolower($this->image_library);

		/* Set the full server path
		 *
		 * The source image may or may not contain a path.
		 * Either way, we'll try use realpath to generate the
		 * full server path in order to more reliably read it.
		 */
		if (($full_source_path = realpath($this->source_image)) !== FALSE)
		{
			$full_source_path = str_replace('\\', '/', $full_source_path);
		}
		else
		{
			$full_source_path = $this->source_image;
		}

		$x = explode('/', $full_source_path);
		$this->source_image = end($x);
		$this->source_folder = str_replace($this->source_image, '', $full_source_path);

		// Set the Image Properties
		if ( ! $this->get_image_properties($this->source_folder.$this->source_image))
		{
			return FALSE;
		}

		/*
		 * Assign the "new" image name/path
		 *
		 * If the user has set a "new_image" name it means
		 * we are making a copy of the source image. If not
		 * it means we are altering the original. We'll
		 * set the destination filename and path accordingly.
		 */
		if ($this->new_image === '')
		{
			$this->dest_image = $this->source_image;
			$this->dest_folder = $this->source_folder;
		}
		elseif (strpos($this->new_image, '/') === FALSE)
		{
			$this->dest_folder = $this->source_folder;
			$this->dest_image = $this->new_image;
		}
		else
		{
			if (strpos($this->new_image, '/') === FALSE && strpos($this->new_image, '\\') === FALSE)
			{
				$full_dest_path = str_replace('\\', '/', realpath($this->new_image));
			}
			else
			{
				$full_dest_path = $this->new_image;
			}

			// Is there a file name?
			if ( ! preg_match('#\.(jpg|jpeg|gif|png)$#i', $full_dest_path))
			{
				$this->dest_folder = $full_dest_path.'/';
				$this->dest_image = $this->source_image;
			}
			else
			{
				$x = explode('/', $full_dest_path);
				$this->dest_image = end($x);
				$this->dest_folder = str_replace($this->dest_image, '', $full_dest_path);
			}
		}

		/* Compile the finalized filenames/paths
		 *
		 * We'll create two master strings containing the
		 * full server path to the source image and the
		 * full server path to the destination image.
		 * We'll also split the destination image name
		 * so we can insert the thumbnail marker if needed.
		 */
		if ($this->create_thumb === FALSE OR $this->thumb_marker === '')
		{
			$this->thumb_marker = '';
		}

		$xp = $this->explode_name($this->dest_image);

		$filename = $xp['name'];
		$file_ext = $xp['ext'];

		$this->full_src_path = $this->source_folder.$this->source_image;
		$this->full_dst_path = $this->dest_folder.$filename.$this->thumb_marker.$file_ext;

		/* Should we maintain image proportions?
		 *
		 * When creating thumbs or copies, the target width/height
		 * might not be in correct proportion with the source
		 * image's width/height. We'll recalculate it here.
		 */
		if ($this->maintain_ratio === TRUE && ($this->width !== 0 OR $this->height !== 0))
		{
			$this->image_reproportion();
		}

		/* Was a width and height specified?
		 *
		 * If the destination width/height was not submitted we
		 * will use the values from the actual file
		 */
		if ($this->width === '')
		{
			$this->width = $this->orig_width;
		}

		if ($this->height === '')
		{
			$this->height = $this->orig_height;
		}

		// Set the quality
		$this->quality = trim(str_replace('%', '', $this->quality));

		if ($this->quality === '' OR $this->quality === 0 OR ! ctype_digit($this->quality))
		{
			$this->quality = 90;
		}

		// Set the x/y coordinates
		is_numeric($this->x_axis) OR $this->x_axis = 0;
		is_numeric($this->y_axis) OR $this->y_axis = 0;

		// Watermark-related Stuff...
		if ($this->wm_overlay_path !== '')
		{
			$this->wm_overlay_path = str_replace('\\', '/', realpath($this->wm_overlay_path));
		}

		if ($this->wm_shadow_color !== '')
		{
			$this->wm_use_drop_shadow = TRUE;
		}
		elseif ($this->wm_use_drop_shadow === TRUE && $this->wm_shadow_color === '')
		{
			$this->wm_use_drop_shadow = FALSE;
		}

		if ($this->wm_font_path !== '')
		{
			$this->wm_use_truetype = TRUE;
		}

		return TRUE;
	}

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

	/**
	 * Image Resize
	 *
	 * This is a wrapper function that chooses the proper
	 * resize function based on the protocol specified
	 *
	 * @return	bool
	 */
	public function resize()
	{
		$protocol = ($this->image_library === 'gd2') ? 'image_process_gd' : 'image_process_'.$this->image_library;
		return $this->$protocol('resize');
	}

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

	/**
	 * Image Crop
	 *
	 * This is a wrapper function that chooses the proper
	 * cropping function based on the protocol specified
	 *
	 * @return	bool
	 */
	public function crop()
	{
		$protocol = ($this->image_library === 'gd2') ? 'image_process_gd' : 'image_process_'.$this->image_library;
		return $this->$protocol('crop');
	}

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

	/**
	 * Image Rotate
	 *
	 * This is a wrapper function that chooses the proper
	 * rotation function based on the protocol specified
	 *
	 * @return	bool
	 */
	public function rotate()
	{
		// Allowed rotation values
		$degs = array(90, 180, 270, 'vrt', 'hor');

		if ($this->rotation_angle === '' OR ! in_array($this->rotation_angle, $degs))
		{
			$this->set_error('imglib_rotation_angle_required');
			return FALSE;
		}

		// Reassign the width and height
		if ($this->rotation_angle === 90 OR $this->rotation_angle === 270)
		{
			$this->width	= $this->orig_height;
			$this->height	= $this->orig_width;
		}
		else
		{
			$this->width	= $this->orig_width;
			$this->height	= $this->orig_height;
		}

		// Choose resizing function
		if ($this->image_library === 'imagemagick' OR $this->image_library === 'netpbm')
		{
			$protocol = 'image_process_'.$this->image_library;
			return $this->$protocol('rotate');
		}

		return ($this->rotation_angle === 'hor' OR $this->rotation_angle === 'vrt')
			? $this->image_mirror_gd()
			: $this->image_rotate_gd();
	}

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

	/**
	 * Image Process Using GD/GD2
	 *
	 * This function will resize or crop
	 *
	 * @param	string
	 * @return	bool
	 */
	public function image_process_gd($action = 'resize')
	{
		$v2_override = FALSE;

		// If the target width/height match the source, AND if the new file name is not equal to the old file name
		// we'll simply make a copy of the original with the new name... assuming dynamic rendering is off.
		if ($this->dynamic_output === FALSE && $this->orig_width === $this->width && $this->orig_height === $this->height)
		{
			if ($this->source_image !== $this->new_image && @copy($this->full_src_path, $this->full_dst_path))
			{
				chmod($this->full_dst_path, $this->file_permissions);
			}

			return TRUE;
		}

		// Let's set up our values based on the action
		if ($action === 'crop')
		{
			// Reassign the source width/height if cropping
			$this->orig_width  = $this->width;
			$this->orig_height = $this->height;

			// GD 2.0 has a cropping bug so we'll test for it
			if ($this->gd_version() !== FALSE)
			{
				$gd_version = str_replace('0', '', $this->gd_version());
				$v2_override = ($gd_version == 2);
			}
		}
		else
		{
			// If resizing the x/y axis must be zero
			$this->x_axis = 0;
			$this->y_axis = 0;
		}

		// Create the image handle
		if ( ! ($src_img = $this->image_create_gd()))
		{
			return FALSE;
		}

		/* Create the image
		 *
		 * Old conditional which users report cause problems with shared GD libs who report themselves as "2.0 or greater"
		 * it appears that this is no longer the issue that it was in 2004, so we've removed it, retaining it in the comment
		 * below should that ever prove inaccurate.
		 *
		 * if ($this->image_library === 'gd2' && function_exists('imagecreatetruecolor') && $v2_override === FALSE)
		 */
		if ($this->image_library === 'gd2' && function_exists('imagecreatetruecolor'))
		{
			$create	= 'imagecreatetruecolor';
			$copy	= 'imagecopyresampled';
		}
		else
		{
			$create	= 'imagecreate';
			$copy	= 'imagecopyresized';
		}

		$dst_img = $create($this->width, $this->height);

		if ($this->image_type === 3) // png we can actually preserve transparency
		{
			imagealphablending($dst_img, FALSE);
			imagesavealpha($dst_img, TRUE);
		}

		$copy($dst_img, $src_img, 0, 0, $this->x_axis, $this->y_axis, $this->width, $this->height, $this->orig_width, $this->orig_height);

		// Show the image
		if ($this->dynamic_output === TRUE)
		{
			$this->image_display_gd($dst_img);
		}
		elseif ( ! $this->image_save_gd($dst_img)) // Or save it
		{
			return FALSE;
		}

		// Kill the file handles
		imagedestroy($dst_img);
		imagedestroy($src_img);

		chmod($this->full_dst_path, $this->file_permissions);

		return TRUE;
	}

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

	/**
	 * Image Process Using ImageMagick
	 *
	 * This function will resize, crop or rotate
	 *
	 * @param	string
	 * @return	bool
	 */
	public function image_process_imagemagick($action = 'resize')
	{
		// Do we have a vaild library path?
		if ($this->library_path === '')
		{
			$this->set_error('imglib_libpath_invalid');
			return FALSE;
		}

		if ( ! preg_match('/convert$/i', $this->library_path))
		{
			$this->library_path = rtrim($this->library_path, '/').'/convert';
		}

		// Execute the command
		$cmd = $this->library_path.' -quality '.$this->quality;

		if ($action === 'crop')
		{
			$cmd .= ' -crop '.$this->width.'x'.$this->height.'+'.$this->x_axis.'+'.$this->y_axis.' "'.$this->full_src_path.'" "'.$this->full_dst_path .'" 2>&1';
		}
		elseif ($action === 'rotate')
		{
			$angle = ($this->rotation_angle === 'hor' OR $this->rotation_angle === 'vrt')
					? '-flop' : '-rotate '.$this->rotation_angle;

			$cmd .= ' '.$angle.' "'.$this->full_src_path.'" "'.$this->full_dst_path.'" 2>&1';
		}
		else // Resize
		{
			if($this->maintain_ratio === TRUE)
			{
				$cmd .= ' -resize '.$this->width.'x'.$this->height.' "'.$this->full_src_path.'" "'.$this->full_dst_path.'" 2>&1';
			}
			else
			{
				$cmd .= ' -resize '.$this->width.'x'.$this->height.'\! "'.$this->full_src_path.'" "'.$this->full_dst_path.'" 2>&1';
			}
		}

		$retval = 1;
		// exec() might be disabled
		if (function_usable('exec'))
		{
			@exec($cmd, $output, $retval);
		}

		// Did it work?
		if ($retval > 0)
		{
			$this->set_error('imglib_image_process_failed');
			return FALSE;
		}

		chmod($this->full_dst_path, $this->file_permissions);

		return TRUE;
	}

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

	/**
	 * Image Process Using NetPBM
	 *
	 * This function will resize, crop or rotate
	 *
	 * @param	string
	 * @return	bool
	 */
	public function image_process_netpbm($action = 'resize')
	{
		if ($this->library_path === '')
		{
			$this->set_error('imglib_libpath_invalid');
			return FALSE;
		}

		// Build the resizing command
		switch ($this->image_type)
		{
			case 1 :
				$cmd_in		= 'giftopnm';
				$cmd_out	= 'ppmtogif';
				break;
			case 2 :
				$cmd_in		= 'jpegtopnm';
				$cmd_out	= 'ppmtojpeg';
				break;
			case 3 :
				$cmd_in		= 'pngtopnm';
				$cmd_out	= 'ppmtopng';
				break;
		}

		if ($action === 'crop')
		{
			$cmd_inner = 'pnmcut -left '.$this->x_axis.' -top '.$this->y_axis.' -width '.$this->width.' -height '.$this->height;
		}
		elseif ($action === 'rotate')
		{
			switch ($this->rotation_angle)
			{
				case 90:	$angle = 'r270';
					break;
				case 180:	$angle = 'r180';
					break;
				case 270:	$angle = 'r90';
					break;
				case 'vrt':	$angle = 'tb';
					break;
				case 'hor':	$angle = 'lr';
					break;
			}

			$cmd_inner = 'pnmflip -'.$angle.' ';
		}
		else // Resize
		{
			$cmd_inner = 'pnmscale -xysize '.$this->width.' '.$this->height;
		}

		$cmd = $this->library_path.$cmd_in.' '.$this->full_src_path.' | '.$cmd_inner.' | '.$cmd_out.' > '.$this->dest_folder.'netpbm.tmp';

		$retval = 1;
		// exec() might be disabled
		if (function_usable('exec'))
		{
			@exec($cmd, $output, $retval);
		}

		// Did it work?
		if ($retval > 0)
		{
			$this->set_error('imglib_image_process_failed');
			return FALSE;
		}

		// With NetPBM we have to create a temporary image.
		// If you try manipulating the original it fails so
		// we have to rename the temp file.
		copy($this->dest_folder.'netpbm.tmp', $this->full_dst_path);
		unlink($this->dest_folder.'netpbm.tmp');
		chmod($this->full_dst_path, $this->file_permissions);

		return TRUE;
	}

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

	/**
	 * Image Rotate Using GD
	 *
	 * @return	bool
	 */
	public function image_rotate_gd()
	{
		// Create the image handle
		if ( ! ($src_img = $this->image_create_gd()))
		{
			return FALSE;
		}

		// Set the background color
		// This won't work with transparent PNG files so we are
		// going to have to figure out how to determine the color
		// of the alpha channel in a future release.

		$white = imagecolorallocate($src_img, 255, 255, 255);

		// Rotate it!
		$dst_img = imagerotate($src_img, $this->rotation_angle, $white);

		// Show the image
		if ($this->dynamic_output === TRUE)
		{
			$this->image_display_gd($dst_img);
		}
		elseif ( ! $this->image_save_gd($dst_img)) // ... or save it
		{
			return FALSE;
		}

		// Kill the file handles
		imagedestroy($dst_img);
		imagedestroy($src_img);

		chmod($this->full_dst_path, $this->file_permissions);

		return TRUE;
	}

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

	/**
	 * Create Mirror Image using GD
	 *
	 * This function will flip horizontal or vertical
	 *
	 * @return	bool
	 */
	public function image_mirror_gd()
	{
		if ( ! $src_img = $this->image_create_gd())
		{
			return FALSE;
		}

		$width  = $this->orig_width;
		$height = $this->orig_height;

		if ($this->rotation_angle === 'hor')
		{
			for ($i = 0; $i < $height; $i++)
			{
				$left = 0;
				$right = $width - 1;

				while ($left < $right)
				{
					$cl = imagecolorat($src_img, $left, $i);
					$cr = imagecolorat($src_img, $right, $i);

					imagesetpixel($src_img, $left, $i, $cr);
					imagesetpixel($src_img, $right, $i, $cl);

					$left++;
					$right--;
				}
			}
		}
		else
		{
			for ($i = 0; $i < $width; $i++)
			{
				$top = 0;
				$bottom = $height - 1;

				while ($top < $bottom)
				{
					$ct = imagecolorat($src_img, $i, $top);
					$cb = imagecolorat($src_img, $i, $bottom);

					imagesetpixel($src_img, $i, $top, $cb);
					imagesetpixel($src_img, $i, $bottom, $ct);

					$top++;
					$bottom--;
				}
			}
		}

		// Show the image
		if ($this->dynamic_output === TRUE)
		{
			$this->image_display_gd($src_img);
		}
		elseif ( ! $this->image_save_gd($src_img)) // ... or save it
		{
			return FALSE;
		}

		// Kill the file handles
		imagedestroy($src_img);

		chmod($this->full_dst_path, $this->file_permissions);

		return TRUE;
	}

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

	/**
	 * Image Watermark
	 *
	 * This is a wrapper function that chooses the type
	 * of watermarking based on the specified preference.
	 *
	 * @return	bool
	 */
	public function watermark()
	{
		return ($this->wm_type === 'overlay') ? $this->overlay_watermark() : $this->text_watermark();
	}

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

	/**
	 * Watermark - Graphic Version
	 *
	 * @return	bool
	 */
	public function overlay_watermark()
	{
		if ( ! function_exists('imagecolortransparent'))
		{
			$this->set_error('imglib_gd_required');
			return FALSE;
		}

		// Fetch source image properties
		$this->get_image_properties();

		// Fetch watermark image properties
		$props		= $this->get_image_properties($this->wm_overlay_path, TRUE);
		$wm_img_type	= $props['image_type'];
		$wm_width	= $props['width'];
		$wm_height	= $props['height'];

		// Create two image resources
		$wm_img  = $this->image_create_gd($this->wm_overlay_path, $wm_img_type);
		$src_img = $this->image_create_gd($this->full_src_path);

		// Reverse the offset if necessary
		// When the image is positioned at the bottom
		// we don't want the vertical offset to push it
		// further down. We want the reverse, so we'll
		// invert the offset. Same with the horizontal
		// offset when the image is at the right

		$this->wm_vrt_alignment = strtoupper($this->wm_vrt_alignment[0]);
		$this->wm_hor_alignment = strtoupper($this->wm_hor_alignment[0]);

		if ($this->wm_vrt_alignment === 'B')
			$this->wm_vrt_offset = $this->wm_vrt_offset * -1;

		if ($this->wm_hor_alignment === 'R')
			$this->wm_hor_offset = $this->wm_hor_offset * -1;

		// Set the base x and y axis values
		$x_axis = $this->wm_hor_offset + $this->wm_padding;
		$y_axis = $this->wm_vrt_offset + $this->wm_padding;

		// Set the vertical position
		if ($this->wm_vrt_alignment === 'M')
		{
			$y_axis += ($this->orig_height / 2) - ($wm_height / 2);
		}
		elseif ($this->wm_vrt_alignment === 'B')
		{
			$y_axis += $this->orig_height - $wm_height;
		}

		// Set the horizontal position
		if ($this->wm_hor_alignment === 'C')
		{
			$x_axis += ($this->orig_width / 2) - ($wm_width / 2);
		}
		elseif ($this->wm_hor_alignment === 'R')
		{
			$x_axis += $this->orig_width - $wm_width;
		}

		// Build the finalized image
		if ($wm_img_type === 3 && function_exists('imagealphablending'))
		{
			@imagealphablending($src_img, TRUE);
		}

		// Set RGB values for text and shadow
		$rgba = imagecolorat($wm_img, $this->wm_x_transp, $this->wm_y_transp);
		$alpha = ($rgba & 0x7F000000) >> 24;

		// make a best guess as to whether we're dealing with an image with alpha transparency or no/binary transparency
		if ($alpha > 0)
		{
			// copy the image directly, the image's alpha transparency being the sole determinant of blending
			imagecopy($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height);
		}
		else
		{
			// set our RGB value from above to be transparent and merge the images with the specified opacity
			imagecolortransparent($wm_img, imagecolorat($wm_img, $this->wm_x_transp, $this->wm_y_transp));
			imagecopymerge($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height, $this->wm_opacity);
		}

		// We can preserve transparency for PNG images
		if ($this->image_type === 3)
		{
			imagealphablending($src_img, FALSE);
			imagesavealpha($src_img, TRUE);
		}

		// Output the image
		if ($this->dynamic_output === TRUE)
		{
			$this->image_display_gd($src_img);
		}
		elseif ( ! $this->image_save_gd($src_img)) // ... or save it
		{
			return FALSE;
		}

		imagedestroy($src_img);
		imagedestroy($wm_img);

		return TRUE;
	}

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

	/**
	 * Watermark - Text Version
	 *
	 * @return	bool
	 */
	public function text_watermark()
	{
		if ( ! ($src_img = $this->image_create_gd()))
		{
			return FALSE;
		}

		if ($this->wm_use_truetype === TRUE && ! file_exists($this->wm_font_path))
		{
			$this->set_error('imglib_missing_font');
			return FALSE;
		}

		// Fetch source image properties
		$this->get_image_properties();

		// Reverse the vertical offset
		// When the image is positioned at the bottom
		// we don't want the vertical offset to push it
		// further down. We want the reverse, so we'll
		// invert the offset. Note: The horizontal
		// offset flips itself automatically

		if ($this->wm_vrt_alignment === 'B')
		{
			$this->wm_vrt_offset = $this->wm_vrt_offset * -1;
		}

		if ($this->wm_hor_alignment === 'R')
		{
			$this->wm_hor_offset = $this->wm_hor_offset * -1;
		}

		// Set font width and height
		// These are calculated differently depending on
		// whether we are using the true type font or not
		if ($this->wm_use_truetype === TRUE)
		{
			if (empty($this->wm_font_size))
			{
				$this->wm_font_size = 17;
			}

			if (function_exists('imagettfbbox'))
			{
				$temp = imagettfbbox($this->wm_font_size, 0, $this->wm_font_path, $this->wm_text);
				$temp = $temp[2] - $temp[0];

				$fontwidth = $temp / strlen($this->wm_text);
			}
			else
			{
				$fontwidth = $this->wm_font_size - ($this->wm_font_size / 4);
			}

			$fontheight = $this->wm_font_size;
			$this->wm_vrt_offset += $this->wm_font_size;
		}
		else
		{
			$fontwidth  = imagefontwidth($this->wm_font_size);
			$fontheight = imagefontheight($this->wm_font_size);
		}

		// Set base X and Y axis values
		$x_axis = $this->wm_hor_offset + $this->wm_padding;
		$y_axis = $this->wm_vrt_offset + $this->wm_padding;

		if ($this->wm_use_drop_shadow === FALSE)
		{
			$this->wm_shadow_distance = 0;
		}

		$this->wm_vrt_alignment = strtoupper($this->wm_vrt_alignment[0]);
		$this->wm_hor_alignment = strtoupper($this->wm_hor_alignment[0]);

		// Set vertical alignment
		if ($this->wm_vrt_alignment === 'M')
		{
			$y_axis += ($this->orig_height / 2) + ($fontheight / 2);
		}
		elseif ($this->wm_vrt_alignment === 'B')
		{
			$y_axis += $this->orig_height - $fontheight - $this->wm_shadow_distance - ($fontheight / 2);
		}

		// Set horizontal alignment
		if ($this->wm_hor_alignment === 'R')
		{
			$x_axis += $this->orig_width - ($fontwidth * strlen($this->wm_text)) - $this->wm_shadow_distance;
		}
		elseif ($this->wm_hor_alignment === 'C')
		{
			$x_axis += floor(($this->orig_width - ($fontwidth * strlen($this->wm_text))) / 2);
		}

		if ($this->wm_use_drop_shadow)
		{
			// Offset from text
			$x_shad = $x_axis + $this->wm_shadow_distance;
			$y_shad = $y_axis + $this->wm_shadow_distance;

			/* Set RGB values for shadow
			 *
			 * First character is #, so we don't really need it.
			 * Get the rest of the string and split it into 2-length
			 * hex values:
			 */
			$drp_color = str_split(substr($this->wm_shadow_color, 1, 6), 2);
			$drp_color = imagecolorclosest($src_img, hexdec($drp_color[0]), hexdec($drp_color[1]), hexdec($drp_color[2]));

			// Add the shadow to the source image
			if ($this->wm_use_truetype)
			{
				imagettftext($src_img, $this->wm_font_size, 0, $x_shad, $y_shad, $drp_color, $this->wm_font_path, $this->wm_text);
			}
			else
			{
				imagestring($src_img, $this->wm_font_size, $x_shad, $y_shad, $this->wm_text, $drp_color);
			}
		}

		/* Set RGB values for text
		 *
		 * First character is #, so we don't really need it.
		 * Get the rest of the string and split it into 2-length
		 * hex values:
		 */
		$txt_color = str_split(substr($this->wm_font_color, 1, 6), 2);
		$txt_color = imagecolorclosest($src_img, hexdec($txt_color[0]), hexdec($txt_color[1]), hexdec($txt_color[2]));

		// Add the text to the source image
		if ($this->wm_use_truetype)
		{
			imagettftext($src_img, $this->wm_font_size, 0, $x_axis, $y_axis, $txt_color, $this->wm_font_path, $this->wm_text);
		}
		else
		{
			imagestring($src_img, $this->wm_font_size, $x_axis, $y_axis, $this->wm_text, $txt_color);
		}

		// We can preserve transparency for PNG images
		if ($this->image_type === 3)
		{
			imagealphablending($src_img, FALSE);
			imagesavealpha($src_img, TRUE);
		}

		// Output the final image
		if ($this->dynamic_output === TRUE)
		{
			$this->image_display_gd($src_img);
		}
		else
		{
			$this->image_save_gd($src_img);
		}

		imagedestroy($src_img);

		return TRUE;
	}

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

	/**
	 * Create Image - GD
	 *
	 * This simply creates an image resource handle
	 * based on the type of image being processed
	 *
	 * @param	string
	 * @param	string
	 * @return	resource
	 */
	public function image_create_gd($path = '', $image_type = '')
	{
		if ($path === '')
		{
			$path = $this->full_src_path;
		}

		if ($image_type === '')
		{
			$image_type = $this->image_type;
		}

		switch ($image_type)
		{
			case 1:
				if ( ! function_exists('imagecreatefromgif'))
				{
					$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));
					return FALSE;
				}

				return imagecreatefromgif($path);
			case 2:
				if ( ! function_exists('imagecreatefromjpeg'))
				{
					$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_jpg_not_supported'));
					return FALSE;
				}

				return imagecreatefromjpeg($path);
			case 3:
				if ( ! function_exists('imagecreatefrompng'))
				{
					$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));
					return FALSE;
				}

				return imagecreatefrompng($path);
			default:
				$this->set_error(array('imglib_unsupported_imagecreate'));
				return FALSE;
		}
	}

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

	/**
	 * Write image file to disk - GD
	 *
	 * Takes an image resource as input and writes the file
	 * to the specified destination
	 *
	 * @param	resource
	 * @return	bool
	 */
	public function image_save_gd($resource)
	{
		switch ($this->image_type)
		{
			case 1:
				if ( ! function_exists('imagegif'))
				{
					$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));
					return FALSE;
				}

				if ( ! @imagegif($resource, $this->full_dst_path))
				{
					$this->set_error('imglib_save_failed');
					return FALSE;
				}
			break;
			case 2:
				if ( ! function_exists('imagejpeg'))
				{
					$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_jpg_not_supported'));
					return FALSE;
				}

				if ( ! @imagejpeg($resource, $this->full_dst_path, $this->quality))
				{
					$this->set_error('imglib_save_failed');
					return FALSE;
				}
			break;
			case 3:
				if ( ! function_exists('imagepng'))
				{
					$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));
					return FALSE;
				}

				if ( ! @imagepng($resource, $this->full_dst_path))
				{
					$this->set_error('imglib_save_failed');
					return FALSE;
				}
			break;
			default:
				$this->set_error(array('imglib_unsupported_imagecreate'));
				return FALSE;
			break;
		}

		return TRUE;
	}

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

	/**
	 * Dynamically outputs an image
	 *
	 * @param	resource
	 * @return	void
	 */
	public function image_display_gd($resource)
	{
		header('Content-Disposition: filename='.$this->source_image.';');
		header('Content-Type: '.$this->mime_type);
		header('Content-Transfer-Encoding: binary');
		header('Last-Modified: '.gmdate('D, d M Y H:i:s', time()).' GMT');

		switch ($this->image_type)
		{
			case 1	:	imagegif($resource);
				break;
			case 2	:	imagejpeg($resource, NULL, $this->quality);
				break;
			case 3	:	imagepng($resource);
				break;
			default:	echo 'Unable to display the image';
				break;
		}
	}

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

	/**
	 * Re-proportion Image Width/Height
	 *
	 * When creating thumbs, the desired width/height
	 * can end up warping the image due to an incorrect
	 * ratio between the full-sized image and the thumb.
	 *
	 * This function lets us re-proportion the width/height
	 * if users choose to maintain the aspect ratio when resizing.
	 *
	 * @return	void
	 */
	public function image_reproportion()
	{
		if (($this->width === 0 && $this->height === 0) OR $this->orig_width === 0 OR $this->orig_height === 0
			OR ( ! ctype_digit((string) $this->width) && ! ctype_digit((string) $this->height))
			OR ! ctype_digit((string) $this->orig_width) OR ! ctype_digit((string) $this->orig_height))
		{
			return;
		}

		// Sanitize
		$this->width = (int) $this->width;
		$this->height = (int) $this->height;

		if ($this->master_dim !== 'width' && $this->master_dim !== 'height')
		{
			if ($this->width > 0 && $this->height > 0)
			{
				$this->master_dim = ((($this->orig_height/$this->orig_width) - ($this->height/$this->width)) < 0)
							? 'width' : 'height';
			}
			else
			{
				$this->master_dim = ($this->height === 0) ? 'width' : 'height';
			}
		}
		elseif (($this->master_dim === 'width' && $this->width === 0)
			OR ($this->master_dim === 'height' && $this->height === 0))
		{
			return;
		}

		if ($this->master_dim === 'width')
		{
			$this->height = (int) ceil($this->width*$this->orig_height/$this->orig_width);
		}
		else
		{
			$this->width = (int) ceil($this->orig_width*$this->height/$this->orig_height);
		}
	}

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

	/**
	 * Get image properties
	 *
	 * A helper function that gets info about the file
	 *
	 * @param	string
	 * @param	bool
	 * @return	mixed
	 */
	public function get_image_properties($path = '', $return = FALSE)
	{
		// For now we require GD but we should
		// find a way to determine this using IM or NetPBM

		if ($path === '')
		{
			$path = $this->full_src_path;
		}

		if ( ! file_exists($path))
		{
			$this->set_error('imglib_invalid_path');
			return FALSE;
		}

		$vals = getimagesize($path);
		$types = array(1 => 'gif', 2 => 'jpeg', 3 => 'png');
		$mime = (isset($types[$vals[2]])) ? 'image/'.$types[$vals[2]] : 'image/jpg';

		if ($return === TRUE)
		{
			return array(
					'width' =>	$vals[0],
					'height' =>	$vals[1],
					'image_type' =>	$vals[2],
					'size_str' =>	$vals[3],
					'mime_type' =>	$mime
				);
		}

		$this->orig_width	= $vals[0];
		$this->orig_height	= $vals[1];
		$this->image_type	= $vals[2];
		$this->size_str		= $vals[3];
		$this->mime_type	= $mime;

		return TRUE;
	}

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

	/**
	 * Size calculator
	 *
	 * This function takes a known width x height and
	 * recalculates it to a new size. Only one
	 * new variable needs to be known
	 *
	 *	$props = array(
	 *			'width'		=> $width,
	 *			'height'	=> $height,
	 *			'new_width'	=> 40,
	 *			'new_height'	=> ''
	 *		);
	 *
	 * @param	array
	 * @return	array
	 */
	public function size_calculator($vals)
	{
		if ( ! is_array($vals))
		{
			return;
		}

		$allowed = array('new_width', 'new_height', 'width', 'height');

		foreach ($allowed as $item)
		{
			if (empty($vals[$item]))
			{
				$vals[$item] = 0;
			}
		}

		if ($vals['width'] === 0 OR $vals['height'] === 0)
		{
			return $vals;
		}

		if ($vals['new_width'] === 0)
		{
			$vals['new_width'] = ceil($vals['width']*$vals['new_height']/$vals['height']);
		}
		elseif ($vals['new_height'] === 0)
		{
			$vals['new_height'] = ceil($vals['new_width']*$vals['height']/$vals['width']);
		}

		return $vals;
	}

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

	/**
	 * Explode source_image
	 *
	 * This is a helper function that extracts the extension
	 * from the source_image.  This function lets us deal with
	 * source_images with multiple periods, like: my.cool.jpg
	 * It returns an associative array with two elements:
	 * $array['ext']  = '.jpg';
	 * $array['name'] = 'my.cool';
	 *
	 * @param	array
	 * @return	array
	 */
	public function explode_name($source_image)
	{
		$ext = strrchr($source_image, '.');
		$name = ($ext === FALSE) ? $source_image : substr($source_image, 0, -strlen($ext));

		return array('ext' => $ext, 'name' => $name);
	}

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

	/**
	 * Is GD Installed?
	 *
	 * @return	bool
	 */
	public function gd_loaded()
	{
		if ( ! extension_loaded('gd'))
		{
			/* As it is stated in the PHP manual, dl() is not always available
			 * and even if so - it could generate an E_WARNING message on failure
			 */
			return (function_exists('dl') && @dl('gd.so'));
		}

		return TRUE;
	}

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

	/**
	 * Get GD version
	 *
	 * @return	mixed
	 */
	public function gd_version()
	{
		if (function_exists('gd_info'))
		{
			$gd_version = @gd_info();
			return preg_replace('/\D/', '', $gd_version['GD Version']);
		}

		return FALSE;
	}

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

	/**
	 * Set error message
	 *
	 * @param	string
	 * @return	void
	 */
	public function set_error($msg)
	{
		$CI =& get_instance();
		$CI->lang->load('imglib');

		if (is_array($msg))
		{
			foreach ($msg as $val)
			{
				$msg = ($CI->lang->line($val) === FALSE) ? $val : $CI->lang->line($val);
				$this->error_msg[] = $msg;
				log_message('error', $msg);
			}
		}
		else
		{
			$msg = ($CI->lang->line($msg) === FALSE) ? $msg : $CI->lang->line($msg);
			$this->error_msg[] = $msg;
			log_message('error', $msg);
		}
	}

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

	/**
	 * Show error messages
	 *
	 * @param	string
	 * @param	string
	 * @return	string
	 */
	public function display_errors($open = '<p>', $close = '</p>')
	{
		return (count($this->error_msg) > 0) ? $open.implode($close.$open, $this->error_msg).$close : '';
	}

}




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