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<?php
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/**
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* Invision Power Services
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* IP.Board v3.0.5
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* Image Handler: create thumbnails, apply watermarks and copyright tests, save or display final image
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* Last Updated: $Date: 2009-06-12 22:35:26 -0400 (Fri, 12 Jun 2009) $
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*
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* @author $Author: bfarber $
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* @copyright (c) 2001 - 2009 Invision Power Services, Inc.
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* @license http://www.iinvisionpower.com/community/board/license.html
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* @package Invision Power Services Kernel
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* @link http://www.iinvisionpower.com
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* @since Monday 5th May 2008 14:00
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* @version $Revision: 282 $
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*
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* GD Example
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* <code>
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* $image = new classImageGd();
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* $image->init( array(
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* 'image_path' => "/path/to/images/",
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* 'image_file' => "image_filename.jpg",
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* ) );
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*
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* if( $image->error )
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* {
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* print $image->error;exit;
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* }
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*
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* Set max width and height
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* $image->resizeImage( 600, 480 );
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* // Add a watermark
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* $image->addWatermark( "/path/to/watermark/trans.png" );
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* //$image->addCopyrightText( "Hello World!", array( 'color' => '#ffffff', 'font' => 3 ) );
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* $image->displayImage();
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* </code>
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*/
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/**
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* Image interface
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*
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*/
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interface interfaceImage
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{
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/**
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* Initiate image handler, perform any necessary setup
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*
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* @param array Necessary options to init module
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* @return boolean Initiation successful
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*/
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public function init( $opts=array() );
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/**
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* Add a supported image type (assumes you have properly extended the class to add the support)
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*
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* @param string Image extension type to add support for
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* @return boolean Addition successful
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*/
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public function addImagetype( $ext );
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/**
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* Resize image proportionately
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*
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* @param integer Maximum width
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* @param integer Maximum height
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* @return array Dimensons of the original image and the resized dimensions
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*/
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public function resizeImage( $width, $height );
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/**
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* Write image to file
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*
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* @param string File location (including file name)
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* @return boolean File write successful
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*/
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public function writeImage( $path );
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/**
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* Print image to screen
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*
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* @return void Image printed and script exits
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*/
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public function displayImage();
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/**
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* Add watermark to image
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*
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* @param string Watermark image path
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* @param integer [Optional] Opacity 0-100
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* @return boolean Watermark addition successful
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*/
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public function addWatermark( $path, $opacity=100 );
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/**
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* Add copyright text to image
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*
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* @param string Copyright text to add
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* @param array [Optional] Text options (color, background color, font [1-5])
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* @return boolean Watermark addition successful
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*/
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public function addCopyrightText( $text, $textOpts=array() );
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}
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/**
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* Image abstract class
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*
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*/
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abstract class classImage
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{
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/**
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* Error encountered
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*
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* @access public
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* @var string Error Message
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*/
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public $error = '';
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/**
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* Image Path
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*
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* @access protected
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* @var string Path to image
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*/
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protected $image_path = '';
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/**
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* Image File
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*
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* @access protected
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* @var string Image file to work with
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*/
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protected $image_file = '';
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/**
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* Image path + file
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*
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* @access protected
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* @var string Full image path and filename
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*/
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protected $image_full = '';
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/**
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* Image dimensions
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*
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* @access protected
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* @var array Original Image Dimensions
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*/
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protected $orig_dimensions = array( 'width' => 0, 'height' => 0 );
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/**
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* Image current dimensions
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*
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* @access public
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* @var array Curernt/New Image Dimensions
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*/
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public $cur_dimensions = array( 'width' => 0, 'height' => 0 );
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/**
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* Image Types Supported
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*
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* @access protected
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* @var array Image types we can work with
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*/
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protected $image_types = array( 'gif', 'jpeg', 'jpg', 'jpe', 'png' );
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/**
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* Extension of image
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*
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* @access public
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* @var string Image extension
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*/
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public $image_extension = '';
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/**
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* Resize image anyways (e.g. if we have added watermark)
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*
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* @access public
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* @var bool
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*/
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public $force_resize = false;
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/**
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* Image handler constructor
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*
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* @access public
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* @return boolean Construction successful
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*/
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public function __construct()
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{
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return true;
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}
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/**
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* Image handler desctructor
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*
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* @access public
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* @return void
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*/
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public function __destruct()
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{
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}
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/**
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* Cleans up paths, generates var $in_file_complete
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*
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* @access protected
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* @param string Path to clean
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* @return string Cleaned path
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*/
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protected function _cleanPaths( $path='' )
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{
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//---------------------------------------------------------
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// Remove trailing slash
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//---------------------------------------------------------
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return rtrim( $path, '/' );
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}
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/**
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* Add a supported image type (assumes you have properly extended the class to add the support)
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*
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* @access public
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* @param string Image extension type to add support for
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* @return boolean Addition successful
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*/
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public function addImagetype( $ext )
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{
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//---------------------------------------------------------
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// Add a supported image extension
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//---------------------------------------------------------
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if( !in_array( $ext, $this->image_types ) )
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{
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$this->image_types[] = $ext;
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}
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return true;
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}
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/**
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* Get new dimensions for resizing
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*
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* @access protected
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* @param integer Maximum width
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* @param integer Maximum height
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* @return array [img_width,img_height]
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*/
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protected function _getResizeDimensions( $width, $height )
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{
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//---------------------------------------------------------
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// Verify width and height are valid and > 0
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//---------------------------------------------------------
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$width = intval($width);
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$height = intval($height);
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if( !$width OR !$height )
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{
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$this->error = 'bad_dimensions';
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return false;
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}
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//---------------------------------------------------------
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// Is the current image already smaller?
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//---------------------------------------------------------
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if( $width > $this->cur_dimensions['width'] AND $height > $this->cur_dimensions['height'] )
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{
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$this->error = 'already_smaller';
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return false;
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}
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//---------------------------------------------------------
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// Return new dimensions
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//---------------------------------------------------------
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return $this->_scaleImage( array(
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'cur_height' => $this->cur_dimensions['height'],
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'cur_width' => $this->cur_dimensions['width'],
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'max_height' => $height,
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'max_width' => $width,
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) );
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}
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/**
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* Return proportionate image dimensions based on current and max dimension settings
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*
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* @access protected
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* @param array [ cur_height, cur_width, max_width, max_height ]
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* @return array [ img_height, img_width ]
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*/
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protected function _scaleImage( $arg )
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{
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$ret = array(
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'img_width' => $arg['cur_width'],
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'img_height' => $arg['cur_height']
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);
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if ( $arg['cur_width'] > $arg['max_width'] )
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{
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$ret['img_width'] = $arg['max_width'];
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$ret['img_height'] = ceil( ( $arg['cur_height'] * ( ( $arg['max_width'] * 100 ) / $arg['cur_width'] ) ) / 100 );
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$arg['cur_height'] = $ret['img_height'];
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$arg['cur_width'] = $ret['img_width'];
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}
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if ( $arg['cur_height'] > $arg['max_height'] )
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{
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$ret['img_height'] = $arg['max_height'];
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$ret['img_width'] = ceil( ( $arg['cur_width'] * ( ( $arg['max_height'] * 100 ) / $arg['cur_height'] ) ) / 100 );
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}
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return $ret;
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}
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}
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