Progressive Image Switcher – Cropper

<?php
// --------------------------------------------------------
// 
// Title: Progressive Image Switcher - Cropper
// Version: 1.0
//
// Use:
// Change Progessive Images to Non-Progressive Images and Thumbnails
// for Flash applications.  This script can also be used to dynamically
// create cropped thumbnails for any application.
//
// Created by: MercuryLevel
// Author: Tony Thomas
// email: [email protected]
// Aug 4, 2005
// 
// Copyright (C) 2005  Tony Thomas
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//
// -------------------------------------------------------------------------------
//
// Server Requirements:
// Created and tested on Linux Server with PHP 4.3.2 and GD Version 2.0.12
// 
// Instructions:
// - Create a blank jpg image the same size as the clipping area, and call it non.jpg
// - Place non.jpg in the same folder and the script calling the fucntion
// - Include the script in your program, and call the function with the imagename and path
// - Set the Clipping area and Thumbnail size fields ($ca and $ts)
// - Results will return a thumbnail image
//
// Limitations of this version:
// This script was only written for Jpeg images, because JPEG images that are progressive
// can not be displayed in Flash applications using ActionScript.
//
// Uses: Great for PHP and Flash projects, Image Galleries, Product Catalogs, etc.
//
// Use as you see fit. Add parameters, functions, other image types, what ever you need for both 
// personal or commercial use.
//
// If you use this script or portions of it, please keep the copyright information intact,
// add your comments, updated version number, and please email me the new version. Let me know
// how you used the script. ENJOY!
//
// Tony Thomas - [email protected]
// http://www.mercurylevel.com
//
// View the General Public Licence at:
// http://www.gnu.org/licenses/gpl.txt
//
// -------------------------------------------------------------------------------




function setImage($ImageFilenPath) {

  // set clipping_area
  $ca = 200;

  // set thumbnail_size
  $ts = 30;




  // only use .jpg's as the source file
  // Source should include image path information relative to the script
  // -------------------------------------------------------------------
  $image_text_name = $ImageFilenPath;



  // Get the name of the JPEG
  // ----------------------------------
  $bs_len = strlen($image_text_name);
  $bs_cut = $bs_len - 4;



  // Create the matching thumbnail image name
  // ----------------------------------
  $newThm = substr($image_text_name,0,$bs_cut) . "_thm.jpg";



  // get the full image, width and height
  // ----------------------------------
  $fullimage = imagecreatefromjpeg($image_text_name);
  $f_width = imagesx($fullimage);
  $f_height = imagesy($fullimage);



  // copy the image and resample for flash, keeping $fullimage for later use
  // ----------------------------------
  $newfull = Imagecreatetruecolor($f_width, $f_height);
  imagecopyresampled($newfull, $fullimage, 0, 0, 0, 0, $f_width, $f_height, $f_width, $f_height);
  imagejpeg($newfull,$image_text_name,100);
  imagedestroy($newfull);



  // check width and height for to see if it is worth clipping from the center
  // anything over 3 pixels of the clipping size (200) will be clipped from the center 
  // ----------------------------------

  $ay1 = ($f_height - $ca)/2;
  if($ay1 < 2){
    $clip_y = 0;
  } else {
    $clip_y = intval($ay1);
  }


  $ax1 = ($f_width - $ca)/2;
  if($ax1 < 2){
    $clip_x = 0;
  } else {
    $clip_x = intval($ax1);
  }




  // check width and height to see which is larger, then check the smaller for clippable area
  // if not enough pixels to clip then use the smaller size as the basis of the square
  // eg. Width=300   Height=180   Clipping-area=200
  // The result would be a square 180 pixels, later resized to 30
  // ----------------------------------

  if($f_width >> $f_height){
    if($f_height >> $ca) {
      $new_width = $ca;
      $new_height = $ca;
  
    } else {
      $new_width = $f_height;
      $new_height = $f_height;
    }
  } else {
    if($f_width >> $ca) {
      $new_width = $ca;
      $new_height = $ca;
    } else {
      $new_width = $f_width;
      $new_height = $f_width;
    }
  }




  // use blank non.jpg image (same size as clipping area) as the image to copy to
  // The nice thing about the blank image is that it is resized to fit any smaller images
  // ----------------------------------

  $tempImg = imagecreatefromjpeg("non.jpg");
  imagecopy($tempImg, $fullimage, 0, 0, $clip_x, $clip_y, $new_width, $new_height);
  imagejpeg($tempImg,$newThm,100);
  imagedestroy($tempImg);
  imagedestroy($fullimage);




  // Create the new thumbnail and resample it for Flash
  // ----------------------------------

  $srcImage = imagecreatefromjpeg($newThm);
  $destImage = Imagecreatetruecolor($ts, $ts);
  imagecopyresampled($destImage, $srcImage, 0, 0, 0, 0, $ts, $ts, $new_width, $new_height);
  imagejpeg($destImage,$newThm,100);
  imagedestroy($srcImage);
  imagedestroy($destImage);

  return $newThm;

}


$myimage = setImage("cordova5.jpg");
echo "<img src="".$myimage."">";



?>