Tidbits @ Kassemi

/*
* Basic PHP Image class
* Copyright (C) 2005 James Kassemi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.

* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.

* You can view the LGPL here: http://www.gnu.org/licenses/lgpl.html
*
* Requirements:
*
* PHP with compiled gd library
*
* Description:
*
* Very simple class for dealing with images. Main purpose was for simple resize.
*
* Functions:
*
* set_image(string $path)
* start off by setting the path to the starter image.
*
* image_type()
* returns the type of the image in plain text.
*
* create_image_resource()
* creates a resource image based on the type of the image set using set_image()
*
* resize($width, $height, $unit='px', $dest_x=0, $dest_y=0, $src_x=0, $src_y=0)
* resizes the image to a new image resource, which it returns.
* width => desired width after resize.
* height => desired height after resize.
* unit => Can be set to either px or %, adjusts size accordingly.
* dest_x => the starting x pixel on the resized image...
* dest_y => the starting y pixel on the resized image...
* src_x => the x pixel in which to start grabbing the source image...
* src_y => the y pixel in which to start grabbing the source image...
*
* save($image, $filename, $quality=100, $type='')
* saves an image resource to a file
* image => the image resource to save
* filename => filename to save to.
* quality => for jpegs, adjust quality of file.
* type => specify the type (jpg, png, gif, wbmp)
* if none is specified, will use the type of the image set with set_image
*
* output($image, $type='', $quality='100', $header=true
* outputs an image resources content to the browser
* image => the image resource to output
* type => the image type to output
* quality => for jpegs, adjust quality of output.
* header => true or false... Output the mime type...
*
* Sample usage:
*
* Takes the PHP logo from the php.net site, and resizes it to 200px by 200px
*
*
include ('./class/image.php')
$image = new image();
$image->set_image('http://us2.php.net/images/php.gif');
$new = $image->resize(200, 200);
$image->output($new, 'jpg');
?>

*/

class image {

public $path;

function set_image($path){
$this->path = $path;
}

function image_type(){
$type = getimagesize($this->path);
$type = $type[2];
switch($type){
case 1:
return "gif";
case 2:
return "jpg";
case 3:
return "png";
case 4:
return "swf";
case 5:
return "psd";
case 6:
return "bmp";
case 7:
return "tiff(intel)";
case 8:
return "tiff(motorola)";
case 9:
return "jpc";
case 10:
return "jp2";
case 11:
return "jpx";
case 12:
return "jb2";
case 13:
return "swc";
case 14 :
return "iff";
case 15:
return "wbmp";
case 16:
return "xbm";
default:
return false;
}
}

function create_image_resource(){
/* This will convert the set image to the proper resource, so we can work with it. */
$type = $this->image_type();
switch($type){
case 'gif':
return imagecreatefromgif($this->path);
case 'jpg':
return imagecreatefromjpeg($this->path);
case 'png':
return imagecreatefrompng($this->path);
case 'wbmp':
return imagecreatefromwbmp($this->path);
default:
return false;
}
}

function resize($width, $height, $unit='px', $dest_x=0, $dest_y=0, $src_x=0, $src_y=0){
$image_old = $this->create_image_resource();
$size = getimagesize($this->path);
$old_width = $size[0];
$old_height = $size[1];
switch($unit){
case 'px':
$new_width = $width;
$new_height = $height;
break;
case '%':
$width = $width / 100;
$height = $height / 100;
$new_width = $old_width * $height;
$new_height = $old_height * $height;
break;
default:
return false;
}
$image_new = imagecreatetruecolor($new_width, $new_height);
$success = imagecopyresampled($image_new, $image_old, $dest_x, $dest_y, $src_x, $src_y, $new_width, $new_height,
$old_width, $old_height);
return $image_new;
}

function save($image, $filename, $quality='100', $type=''){
if($type=''){ $type=$this->image_type(); }
switch($type){
case 'gif':
imagegif($image, $filename);
return true;
case 'jpg':
imagejpeg($image, $filename);
return true;
case 'png':
imagepng($image, $filename);
return true;
case 'wbmp':
imagewbmp($image, $filename);
return true;
default:
return false;
}
}

function output($image, $type='', $quality='100', $header=true){
if($type==''){ $type=$this->image_type(); }
switch($type){
case 'gif':
if($header==true)
header('Content-type: image/gif');
imagegif($image);
break;
case 'jpg':
if($header==true)
header('Content-type: image/jpeg');
imagejpeg($image);
break;
case 'png':
if($header==true)
header('Content-type: image/png');
imagepng($image);
break;
case 'wbmp':
if($header==true)
header('Content-type: image/wbmp');
imagewbmp($image);
break;
default:
return false;
}
}

}



?>