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<?php
/*
+--------------------------------------------------------------------------
| Invision Power Board
| =============================================
| by Matthew Mecham
| (c) 2001 - 2006 Invision Power Services, Inc.
| Nullified by Terabyte
| =============================================
|
|
+---------------------------------------------------------------------------
| > $Date: 2005-10-10 14:03:20 +0100 (Mon, 10 Oct 2005) $
| > $Revision: 22 $
| > $Author: matt $
+---------------------------------------------------------------------------
|
| > GD / IMAGE handling methods (KERNEL)
| > Module written by Matt Mecham
| > Date started: 2nd Feb. 2004
|
| > Module Version Number: 1.0.0
+--------------------------------------------------------------------------
*/
/**
* IPS Kernel Pages: Image Class
*
* This class contains all generic functions to
* handle GD 1 & 2 thumbnail generation
*
* Example Usage:
* <code>
* $image = new class_image();
*
* $image->in_type = 'file';
* $image->out_type = 'file';
* $image->in_file_dir = './uploads';
* $image->in_file_name = 'somepicture.jpg';
* $image->desired_width = 200;
* $image->desired_height = 200;
* $image->gd_version = 2;
*
* $return = $image->generate_thumbnail();
*
* print_r( $return );
* // Prints
* Array( thumb_width => int
* thumb_height => int
* thumb_location => string )
* </code>
*
* @package IPS_KERNEL
* @author Matt Mecham
* @copyright Invision Power Services, Inc.
* @version 2.1
*/
/**
*
*/
/**
* Image Class
*
* Methods and functions for handling thumbnail generation
*
* @package IPS_KERNEL
* @author Matt Mecham
* @version 2.1
*/
class class_image
{
/**
* Type of incoming data
*
* @var string Type
*/
var $in_type = 'file';
/**
* Type of outgoing data
*
* @var string Type
*/
var $out_type = 'file';
/**
* Save file as...
*
* @var string File name
*/
var $out_file_name = '';
/**
* Save file in...
*
* @var string Directory
*/
var $out_file_dir = '';
/**
* In file directory
*
* @var string Directory
*/
var $in_file_dir = '.';
/**
* Name of input file name
*
* @var string File name
*/
var $in_file_name = '';
/**
* Complete file name with path
*
* @var string
*/
var $in_file_complete = '';
/**
* Max. thumbnail width
*
* @var integer Pixels
*/
var $desired_width = 0;
/**
* Max. thumbnail height
*
* @var integer Pixels
*/
var $desired_height = 0;
/**
* GD version
*
* @var integer GD version
*/
var $gd_version = 2;
/**
* Image type (PNG, JPG, GIF)
*
* @var string Image type
*/
var $image_type = '';
/**
* File extension
*
* @var string
*/
var $file_extension = '';
/*-------------------------------------------------------------------------*/
// CONSTRUCTOR
/*-------------------------------------------------------------------------*/
function class_image()
{
//-----------------------------------
// Full path?
//-----------------------------------
}
/*-------------------------------------------------------------------------*/
// Clean paths
/*-------------------------------------------------------------------------*/
/**
* Cleans up paths, generates var $in_file_complete
*
* @return void
*/
function clean_paths()
{
$this->in_file_dir = preg_replace( "#/$#", "", $this->in_file_dir );
$this->out_file_dir = preg_replace( "#/$#", "", $this->out_file_dir );
if ( $this->in_file_dir and $this->in_file_name )
{
$this->in_file_complete = $this->in_file_dir.'/'.$this->in_file_name;
}
else
{
$this->in_file_complete = $this->in_file_name;
}
if ( ! $this->out_file_dir )
{
$this->out_file_dir = $this->in_file_dir;
}
}
/*-------------------------------------------------------------------------*/
// GENERATE THUMBNAIL
/*-------------------------------------------------------------------------*/
/**
* Generates thumnbail
*
* @return array [ thumb_width, thumb_height, thumb_location ]
*/
function generate_thumbnail()
{
$return = array();
$image = "";
$thumb = "";
//-----------------------------------
// Set up paths
//-----------------------------------
$this->clean_paths();
$remap = array( 1 => 'GIF', 2 => 'JPG', 3 => 'PNG', 4 => 'SWF', 5 => 'PSD', 6 => 'BMP' );
if ( $this->desired_width and $this->desired_height )
{
//----------------------------------------------------
// Tom Thumb!
//----------------------------------------------------
$img_size = array();
if ( $this->in_type == 'file' )
{
$img_size = @GetImageSize( $this->in_file_complete );
}
if ( $img_size[0] < 1 and $img_size[1] < 1 )
{
$img_size = array();
$img_size[0] = $this->desired_width;
$img_size[1] = $this->desired_height;
$return['thumb_width'] = $this->desired_width;
$return['thumb_height'] = $this->desired_height;
if ( $this->out_type == 'file' )
{
$return['thumb_location'] = $this->in_file_name;
return $return;
}
else
{
//----------------------------------------------------
// Show image
//----------------------------------------------------
$this->show_non_gd();
}
}
//----------------------------------------------------
// Do we need to scale?
//----------------------------------------------------
if ( ( $img_size[0] > $this->desired_width ) OR ( $img_size[1] > $this->desired_height ) )
{
$im = $this->scale_image( array(
'max_width' => $this->desired_width,
'max_height' => $this->desired_height,
'cur_width' => $img_size[0],
'cur_height' => $img_size[1]
) );
$return['thumb_width'] = $im['img_width'];
$return['thumb_height'] = $im['img_height'];
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
//-----------------------------------------------
// May as well scale properly.
//-----------------------------------------------
if ( $im['img_width'] )
{
$this->desired_width = $im['img_width'];
}
if ( $im['img_height'] )
{
$this->desired_height = $im['img_height'];
}
//-----------------------------------------------
// GD functions available?
//-----------------------------------------------
if ( $remap[ $img_size[2] ] == 'GIF' )
{
if ( function_exists( 'imagecreatefromgif') )
{
if ( $image = @imagecreatefromgif( $this->in_file_complete ) )
{
$this->image_type = 'gif';
}
else
{
if ( $this->out_type == 'file' )
{
$return['thumb_width'] = $this->desired_width;
$return['thumb_height'] = $this->desired_height;
$return['thumb_location'] = $this->in_file_name;
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
}
else
{
//-----------------------------------------------
// Show Image..
//-----------------------------------------------
$this->show_non_gd();
}
}
}
}
else if ( $remap[ $img_size[2] ] == 'PNG' )
{
if ( function_exists( 'imagecreatefrompng') )
{
if ( $image = @imagecreatefrompng( $this->in_file_complete ) )
{
$this->image_type = 'png';
}
else
{
if ( $this->out_type == 'file' )
{
$return['thumb_width'] = $this->desired_width;
$return['thumb_height'] = $this->desired_height;
$return['thumb_location'] = $this->in_file_name;
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
}
else
{
//-----------------------------------------------
// Show Image..
//-----------------------------------------------
$this->show_non_gd();
}
}
}
}
else if ( $remap[ $img_size[2] ] == 'JPG' )
{
if ( function_exists( 'imagecreatefromjpeg') )
{
if ( $image = @imagecreatefromjpeg( $this->in_file_complete ) )
{
$this->image_type = 'jpg';
}
else
{
if ( $this->out_type == 'file' )
{
$return['thumb_width'] = $this->desired_width;
$return['thumb_height'] = $this->desired_height;
$return['thumb_location'] = $this->in_file_name;
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
}
else
{
//-----------------------------------------------
// Show Image..
//-----------------------------------------------
$this->show_non_gd();
}
}
}
}
//----------------------------------------------------
// Did we get a return from imagecreatefrom?
//----------------------------------------------------
if ( $image )
{
if ( $this->gd_version == 1 )
{
$thumb = @imagecreate( $im['img_width'], $im['img_height'] );
@imagecopyresized( $thumb, $image, 0, 0, 0, 0, $im['img_width'], $im['img_height'], $img_size[0], $img_size[1] );
}
else
{
$thumb = @imagecreatetruecolor( $im['img_width'], $im['img_height'] );
if( $this->image_type == 'png' )
{
@imagealphablending( $thumb, FALSE );
@imagesavealpha( $thumb, TRUE );
$transparent = @imagecolorallocatealpha($thumb, 255, 255, 255, 127);
@imagefilledrectangle($thumb, 0, 0, $im['img_width'], $im['img_height'], $transparent);
}
@imagecopyresampled($thumb, $image, 0, 0, 0, 0, $im['img_width'], $im['img_height'], $img_size[0], $img_size[1] );
}
//-----------------------------------------------
// Saving?
//-----------------------------------------------
if ( $this->out_type == 'file' )
{
if ( ! $this->out_file_name )
{
//-----------------------------------------------
// Remove file extension...
//-----------------------------------------------
$this->out_file_name = preg_replace( "/^(.*)\..+?$/", "\\1", $this->in_file_name ) . '_thumb';
}
if ( function_exists( 'imagepng' ) AND $this->image_type == 'png' )
{
$this->file_extension = 'png';
@imagepng( $thumb, $this->out_file_dir."/".$this->out_file_name.'.png' );
@chmod( $this->out_file_dir."/".$this->out_file_name.'.png', 0777 );
@imagedestroy( $thumb );
@imagedestroy( $image );
$return['thumb_location'] = $this->out_file_name.'.png';
return $return;
}
else if ( function_exists( 'imagejpeg' ) )
{
$this->file_extension = 'jpg';
@imagejpeg( $thumb, $this->out_file_dir."/".$this->out_file_name.'.jpg' );
@chmod( $this->out_file_dir."/".$this->out_file_name.'.jpg', 0777 );
@imagedestroy( $thumb );
@imagedestroy( $image );
$return['thumb_location'] = $this->out_file_name.'.jpg';
return $return;
}
else
{
//--------------------------------------
// Can't save...
//--------------------------------------
$return['thumb_width'] = $this->desired_width;
$return['thumb_height'] = $this->desired_height;
$return['thumb_location'] = $this->in_file_name;
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
return $return;
}
}
else
{
//-----------------------------------------------
// Show image
//-----------------------------------------------
$this->show_image( $thumb, $this->image_type );
}
}
else
{
//----------------------------------------------------
// Could not GD, return..
//----------------------------------------------------
if ( $this->out_type == 'file' )
{
$return['thumb_width'] = $this->desired_width;
$return['thumb_height'] = $this->desired_height;
$return['thumb_location'] = $this->in_file_name;
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
}
else
{
//-----------------------------------------------
// Show Image..
//-----------------------------------------------
$this->show_non_gd();
}
return $return;
}
}
//----------------------------------------------------
// No need to scale..
//----------------------------------------------------
else
{
if ( $this->out_type == 'file' )
{
$return['thumb_width'] = $img_size[0];
$return['thumb_height'] = $img_size[1];
$return['original_width'] = $img_size[0];
$return['original_height'] = $img_size[1];
return $return;
}
else
{
//-----------------------------------------------
// Show Image..
//-----------------------------------------------
$this->show_non_gd();
}
}
}
}
/*-------------------------------------------------------------------------*/
// Show GD image
/*-------------------------------------------------------------------------*/
/**
* Show GD image
*
* @param string Thumbnail data
* @param string Thumbnail type (gif, png, jpg)
* @return void
*/
function show_image( $thumb, $type )
{
flush();
if ( $type == 'gif' )
{
@header('Content-type: image/gif');
}
else if ( $type == 'png' )
{
@header('Content-Type: image/png' );
}
else
{
@header('Content-Type: image/jpeg' );
}
print $thumb;
exit();
}
/*-------------------------------------------------------------------------*/
// Show non GD image
/*-------------------------------------------------------------------------*/
/**
* Show a NON GD image
*
* @return void
*/
function show_non_gd()
{
$file_extension = preg_replace( ".*\.(\w+)$", "\\1", $this->in_file_name );
$file_extension = strtolower( $file_extension );
$file_extension = $file_extension == 'jpeg' ? 'jpg' : $file_extension;
if ( strstr( ' gif jpg png ', ' '.$file_extension.' ' ) )
{
if ( $data = @file_get_contents( $this->in_file_complete ) )
{
$this->show_image( $data, $file_extension );
}
}
}
/*-------------------------------------------------------------------------*/
// Return scaled down image
/*-------------------------------------------------------------------------*/
/**
* Scale an image
*
* @param array [ cur_height, cur_width, max_width, max_height ]
* @return array [ img_height, img_width ]
*/
function scale_image($arg)
{
// max_width, max_height, cur_width, cur_height
$ret = array(
'img_width' => $arg['cur_width'],
'img_height' => $arg['cur_height']
);
if ( $arg['cur_width'] > $arg['max_width'] )
{
$ret['img_width'] = $arg['max_width'];
$ret['img_height'] = ceil( ( $arg['cur_height'] * ( ( $arg['max_width'] * 100 ) / $arg['cur_width'] ) ) / 100 );
$arg['cur_height'] = $ret['img_height'];
$arg['cur_width'] = $ret['img_width'];
}
if ( $arg['cur_height'] > $arg['max_height'] )
{
$ret['img_height'] = $arg['max_height'];
$ret['img_width'] = ceil( ( $arg['cur_width'] * ( ( $arg['max_height'] * 100 ) / $arg['cur_height'] ) ) / 100 );
}
return $ret;
}
}
?>