605 lines
17 KiB
PHP
605 lines
17 KiB
PHP
<?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: GD2 Library
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* Last Updated: $Date: 2009-11-24 18:10:32 -0500 (Tue, 24 Nov 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: 347 $
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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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class classImageGd extends classImage implements interfaceImage
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{
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/**
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* Image resource
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*
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* @access private
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* @var resource Image resource
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*/
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private $image = null;
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/**
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* Image quality settings
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*
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* @access public
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* @var array Image quality settings
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*/
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public $quality = array( 'png' => 8, 'jpg' => 75 );
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/**
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* Initiate image handler, perform any necessary setup
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*
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* @access public
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* @param array Necessary options to init module [image_path, image_file]
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* @return boolean Initiation successful
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*/
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public function init( $opts=array() )
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{
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//---------------------------------------------------------
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// Verify input
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//---------------------------------------------------------
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if( !isset($opts['image_path']) OR !$opts['image_path'] )
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{
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$this->error = 'no_image_path';
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return false;
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}
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if( !isset($opts['image_file']) OR !$opts['image_file'] )
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{
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$this->error = 'no_image_file';
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return false;
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}
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//---------------------------------------------------------
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// Store paths
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//---------------------------------------------------------
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$this->image_path = $this->_cleanPaths( $opts['image_path'] );
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$this->image_file = $opts['image_file'];
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$this->image_full = $this->image_path . '/' . $this->image_file;
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//---------------------------------------------------------
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// Get extension
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//---------------------------------------------------------
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$this->image_extension = strtolower(pathinfo( $this->image_file, PATHINFO_EXTENSION ));
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//---------------------------------------------------------
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// Verify this is a valid image type
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//---------------------------------------------------------
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if( !in_array( $this->image_extension, $this->image_types ) )
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{
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$this->error = 'image_not_supported';
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return false;
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}
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//---------------------------------------------------------
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// Quality values
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//---------------------------------------------------------
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if( isset($opts['jpg_quality']) AND $opts['jpg_quality'] )
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{
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$this->quality['jpg'] = $opts['jpg_quality'];
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}
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if( isset($opts['png_quality']) AND $opts['png_quality'] )
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{
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$this->quality['png'] = $opts['png_quality'];
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}
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//---------------------------------------------------------
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// Get and remember dimensions
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//---------------------------------------------------------
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$dimensions = getimagesize( $this->image_full );
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$this->orig_dimensions = array( 'width' => $dimensions[0], 'height' => $dimensions[1] );
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$this->cur_dimensions = $this->orig_dimensions;
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//---------------------------------------------------------
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// Create image resource
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'gif':
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$this->image = @imagecreatefromgif( $this->image_full );
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break;
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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$this->image = @imagecreatefromjpeg( $this->image_full );
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break;
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case 'png':
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$this->image = @imagecreatefrompng( $this->image_full );
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break;
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}
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if( !$this->image )
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{
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//-----------------------------------------
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// Fallback
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// @see http://forums.invisionpower.com/index.php?app=tracker&showissue=17836
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//-----------------------------------------
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if( $this->image = @imagecreatefromstring( file_get_contents( $this->image_full ) ) )
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{
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return true;
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}
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$this->error = 'no_full_image';
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return false;
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}
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else
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{
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return true;
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}
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}
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/**
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* Resize image proportionately
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*
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* @access public
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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, $height )
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{
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//---------------------------------------------------------
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// Get proportionate dimensions and store
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//---------------------------------------------------------
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$new_dims = $this->_getResizeDimensions( $width, $height );
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if( !is_array($new_dims) OR !count($new_dims) OR !$new_dims['img_width'] )
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{
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if( !$this->force_resize )
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{
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return array();
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}
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else
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{
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$new_dims['img_width'] = $width;
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$new_dims['img_height'] = $height;
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}
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}
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//---------------------------------------------------------
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// Create new image resource
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//---------------------------------------------------------
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$new_img = imagecreatetruecolor( $new_dims['img_width'], $new_dims['img_height'] );
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if( !$new_img )
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{
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$this->error = 'image_creation_failed';
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return array();
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}
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//---------------------------------------------------------
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// Apply alpha blending
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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imagealphablending( $new_img, TRUE );
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break;
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case 'png':
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imagealphablending( $new_img, FALSE );
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imagesavealpha( $new_img, TRUE );
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break;
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}
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//---------------------------------------------------------
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// Copy image resampled
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//---------------------------------------------------------
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@imagecopyresampled( $new_img, $this->image, 0, 0, 0 ,0, $new_dims['img_width'], $new_dims['img_height'], $this->cur_dimensions['width'], $this->cur_dimensions['height'] );
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$this->cur_dimensions = array( 'width' => $new_dims['img_width'], 'height' => $new_dims['img_height'] );
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//---------------------------------------------------------
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// Don't forget the alpha blending
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'png':
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imagealphablending( $new_img, FALSE );
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imagesavealpha( $new_img, TRUE );
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break;
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}
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//---------------------------------------------------------
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// Destroy original resource and store new resource
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//---------------------------------------------------------
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@imagedestroy( $this->image );
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$this->image = $new_img;
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return array( 'originalWidth' => $this->orig_dimensions['width'],
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'originalHeight' => $this->orig_dimensions['height'],
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'newWidth' => $new_dims['img_width'],
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'newHeight' => $new_dims['img_height'] );
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}
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/**
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* Write image to file
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*
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* @access public
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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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//---------------------------------------------------------
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// Remove image if it exists
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//---------------------------------------------------------
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if( file_exists( $path ) )
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{
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@unlink( $path );
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}
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//---------------------------------------------------------
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// Write file and verify
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'gif':
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@imagegif( $this->image, $path );
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break;
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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@imagejpeg( $this->image, $path, $this->quality['jpg'] );
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break;
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case 'png':
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@imagepng( $this->image, $path, $this->quality['png'] );
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break;
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}
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if( !file_exists( $path ) )
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{
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$this->error = 'unable_to_write_image';
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return false;
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}
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//---------------------------------------------------------
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// Chmod 777
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//---------------------------------------------------------
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@chmod( $path, 0777 );
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//---------------------------------------------------------
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// Destroy image resource
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//---------------------------------------------------------
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@imagedestroy( $this->image );
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return true;
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}
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/**
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* Print image to screen
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*
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* @access public
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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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//---------------------------------------------------------
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// Send appropriate header and output image
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'gif':
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@header('Content-type: image/gif');
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@imagegif( $this->image );
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break;
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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@header('Content-Type: image/jpeg' );
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@imagejpeg( $this->image, null, $this->quality['jpg'] );
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break;
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case 'png':
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@header('Content-Type: image/png' );
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@imagepng( $this->image, null, $this->quality['png'] );
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break;
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}
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//---------------------------------------------------------
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// Destroy image resource
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//---------------------------------------------------------
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@imagedestroy( $this->image );
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exit;
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}
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/**
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* Add watermark to image
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*
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* @access public
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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, $opacity=100 )
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{
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//---------------------------------------------------------
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// Verify input
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//---------------------------------------------------------
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if( !$path )
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{
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$this->error = 'no_watermark_path';
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return false;
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}
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$type = strtolower( pathinfo( basename($path), PATHINFO_EXTENSION ) );
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$opacity = $opacity > 100 ? 100 : ( $opacity < 0 ? 1 : $opacity );
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if( !in_array( $type, $this->image_types ) )
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{
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$this->error = 'bad_watermark_type';
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return false;
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}
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//---------------------------------------------------------
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// Create resource from watermark and verify
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//---------------------------------------------------------
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switch( $type )
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{
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case 'gif':
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$mark = imagecreatefromgif( $path );
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break;
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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$mark = imagecreatefromjpeg( $path );
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break;
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case 'png':
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$mark = imagecreatefrompng( $path );
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break;
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}
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if( !$mark )
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{
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$this->error = 'image_creation_failed';
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return false;
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}
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//---------------------------------------------------------
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// Alpha blending..
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'jpeg':
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case 'jpg':
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case 'jpe':
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case 'png':
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@imagealphablending( $this->image, TRUE );
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break;
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}
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//---------------------------------------------------------
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// Get dimensions of watermark
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//---------------------------------------------------------
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$img_info = @getimagesize( $path );
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$locate_x = $this->cur_dimensions['width'] - $img_info[0];
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$locate_y = $this->cur_dimensions['height'] - $img_info[1];
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//---------------------------------------------------------
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// Merge watermark image onto original image
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//---------------------------------------------------------
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if( $type == 'png' )
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{
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@imagecopy( $this->image, $mark, $locate_x, $locate_y, 0, 0, $img_info[0], $img_info[1] );
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}
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else
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{
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@imagecopymerge( $this->image, $mark, $locate_x, $locate_y, 0, 0, $img_info[0], $img_info[1], $opacity );
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}
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//---------------------------------------------------------
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// And alpha blending again...
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//---------------------------------------------------------
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switch( $this->image_extension )
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{
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case 'png':
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@imagealphablending( $this->image, FALSE );
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@imagesavealpha( $this->image, TRUE );
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break;
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}
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//---------------------------------------------------------
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// Destroy watermark image resource and return
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//---------------------------------------------------------
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imagedestroy( $mark );
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$this->force_resize = true;
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return true;
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}
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/**
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* Add copyright text to image
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*
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* @access public
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* @param string Copyright text to add
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* @param array [Optional] Text options (color, halign, valign, padding, font [1-5])
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* @return boolean Watermark addition successful
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*/
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public function addCopyrightText( $text, $textOpts=array() )
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{
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//---------------------------------------------------------
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// Verify input
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//---------------------------------------------------------
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if( !$text )
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{
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$this->error = 'no_text_for_copyright';
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return false;
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}
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$font = $textOpts['font'] ? $textOpts['font'] : 3;
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//---------------------------------------------------------
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// Colors input as hex...convert to rgb
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//---------------------------------------------------------
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$color = $textOpts['color'] ? array(
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hexdec( substr( ltrim( $textOpts['color'], '#' ), 0, 2 ) ),
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hexdec( substr( ltrim( $textOpts['color'], '#' ), 2, 2 ) ),
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hexdec( substr( ltrim( $textOpts['color'], '#' ), 5, 2 ) )
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) : array( 255, 255, 255 );
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$width = $this->cur_dimensions['width'] - 10;
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$halign = ( isset($textOpts['halign']) AND in_array( $textOpts['halign'], array( 'right', 'center', 'left' ) ) )
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? $textOpts['halign'] : 'right';
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$valign = ( isset($textOpts['valign']) AND in_array( $textOpts['valign'], array( 'top', 'middle', 'bottom' ) ) )
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? $textOpts['valign'] : 'bottom';
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$padding = $textOpts['padding'] ? $textOpts['padding'] : 5;
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//---------------------------------------------------------
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// Get some size info and set properties
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//---------------------------------------------------------
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$fontwidth = imagefontwidth($font);
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$fontheight = imagefontheight($font);
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$margin = floor($padding / 2 );
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if ( $width > 0 )
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{
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$maxcharsperline = floor( ($width - ($margin * 2)) / $fontwidth);
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if( $maxcharsperline )
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{
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$text = wordwrap( $text, $maxcharsperline, "\n", 1 );
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}
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}
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$lines = explode( "\n", $text );
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//---------------------------------------------------------
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// Top, middle or bottom?
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//---------------------------------------------------------
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switch( $valign )
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{
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case "middle":
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$y = ( imagesy($this->image) - ( $fontheight * count($lines) ) ) / 2;
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break;
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case "bottom":
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$y = imagesy($this->image) - ( ( $fontheight * count($lines) ) + $margin );
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break;
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default:
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$y = $margin;
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break;
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}
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//---------------------------------------------------------
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// Allocate colors for text/bg
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//---------------------------------------------------------
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$color = imagecolorallocate( $this->image, $color[0], $color[1], $color[2] );
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$rect_back = imagecolorallocate( $this->image, 0,0,0 );
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//---------------------------------------------------------
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// Switch on horizontal position and write text lines
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//---------------------------------------------------------
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switch( $halign )
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{
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case "right":
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while( list($numl, $line) = each($lines) )
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{
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imagefilledrectangle( $this->image, ( imagesx($this->image) - $fontwidth * strlen($line) ) - $margin, $y, imagesx($this->image) - 1, imagesy($this->image) - 1, $rect_back );
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imagestring( $this->image, $font, ( imagesx($this->image) - $fontwidth * strlen($line) ) - $margin, $y, $line, $color );
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$y += $fontheight;
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}
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break;
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case "center":
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while( list($numl, $line) = each($lines) )
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{
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imagefilledrectangle( $this->image, floor( ( imagesx($this->image) - $fontwidth * strlen($line) ) / 2 ), $y, imagesx($this->image), imagesy($this->image), $rect_back );
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imagestring( $this->image, $font, floor( ( imagesx($this->image) - $fontwidth * strlen($line) ) / 2 ), $y, $line, $color );
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$y += $fontheight;
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}
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break;
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default:
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while( list($numl, $line) = each($lines) )
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{
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imagefilledrectangle( $this->image, $margin, $y, imagesx($this->image), imagesy($this->image), $rect_back );
|
|
imagestring( $this->image, $font, $margin, $y, $line, $color );
|
|
$y += $fontheight;
|
|
}
|
|
break;
|
|
}
|
|
|
|
$this->force_resize = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
} |