<?php
/*
 *
 *	Cartoonfy effect generator class.
 *
 */
 Class Cartoonfy {
	var $triplevel;
	var $diffspace;
	var $i0;
	var	$i1;
	/*
	 *
	 *	Constructor
	 *
	 */
	function Cartoonfy ( $p_image, $p_triplevel, $p_diffspace ) {
		$this->triplevel = (int)( 2000.0 + 5000.0 * $p_triplevel );
		$this->diffspace = (int)( $p_diffspace * 32.0 );
		if ( $this->i0 = imageCreateFromString ( fread ( fopen ( $p_image, "rb" ), filesize ( $p_image ) ) ) ) {
			$this->i1 = imageCreateTrueColor ( imageSx ( $this->i0 ), imageSy ( $this->i0 ) );
			for ( $x = (int)$this->diffspace; $x < imageSx ( $this->i0 ) - ( 1 + (int)$this->diffspace ); $x++ ) {
				for ( $y = (int)$this->diffspace; $y < imageSy ( $this->i0 ) - ( 1 + (int)$this->diffspace ); $y++ ) {
					$t = Cartoonfy::GetMaxContrast ( $x, $y );
					if ( $t > $this->triplevel ) {
						imageSetPixel ( $this->i1, $x, $y, 0 );
					}
					else {
						imageSetPixel ( $this->i1, $x, $y, Cartoonfy::FlattenColor ( imageColorAt ( $this->i0, $x, $y ) ) );
					}
				}
			}
			imageDestroy ( $this->i0 );
		}
		else {
			print "<b>".$p_image."</b> is not supported image format!";
			exit;
		}
	}
	/*
	 *
	 *	Non-public functions
	 *
	 */
	function R ( $i ) {return ( ( $i >> 16 ) & 0x000000FF );}
	function G ( $i ) {return ( ( $i >> 8 ) & 0x000000FF );}
	function B ( $i ) {return ( $i & 0x000000FF );}
	function RGB ( $r, $g, $b ) {return  ( $r << 16 ) + ( $g << 8 ) + ( $b );}
	function gmerror ( $cc1, $cc2 ) {return ( ( ( ( Cartoonfy::R ( $cc1 ) - Cartoonfy::R ( $cc2 ) ) * ( Cartoonfy::R ( $cc1 ) - Cartoonfy::R ( $cc2 ) ) ) + ( ( Cartoonfy::G ( $cc1 ) - Cartoonfy::G ( $cc2 ) ) * ( Cartoonfy::G ( $cc1 ) - Cartoonfy::G ( $cc2 ) ) ) + ( ( Cartoonfy::B ( $cc1 ) - Cartoonfy::B ( $cc2 ) ) * ( Cartoonfy::B ( $cc1 ) - Cartoonfy::B ( $cc2 ) ) ) ) );}
	function FlattenColor ( $c ) {return Cartoonfy::RGB ( ( ( Cartoonfy::R ( $c ) ) >> 5 ) << 5, ( ( Cartoonfy::G ( $c ) ) >> 5 ) << 5, ( ( Cartoonfy::B ( $c ) ) >> 5 ) << 5 );}
	function GetMaxContrast ( $x, $y ) {
		$c1;
		$c2;
		$error	= 0;
		$max	= 0;

		$c1 = imageColorAt ( $this->i0, $x - (int)$this->diffspace, $y );
		$c2 = imageColorAt ( $this->i0, $x + (int)$this->diffspace, $y );
		$error = Cartoonfy::gmerror ( $c1, $c2 );
		if ( $error > $max ) $max = $error;

		$c1 = imageColorAt ( $this->i0, $x, $y - (int)$this->diffspace );
		$c2 = imageColorAt ( $this->i0, $x, $y + (int)$this->diffspace );
		$error = Cartoonfy::gmerror ( $c1, $c2 );
		if ( $error > $max ) $max = $error;

		$c1 = imageColorAt ( $this->i0, $x - (int)$this->diffspace, $y - (int)$this->diffspace );
		$c2 = imageColorAt ( $this->i0, $x + (int)$this->diffspace, $y + (int)$this->diffspace );
		$error = Cartoonfy::gmerror ( $c1, $c2 );
		if ( $error > $max ) $max = $error;

		$c1 = imageColorAt ( $this->i0, $x + (int)$this->diffspace, $y - (int)$this->diffspace );
		$c2 = imageColorAt ( $this->i0, $x - (int)$this->diffspace, $y + (int)$this->diffspace );
		$error = Cartoonfy::gmerror ( $c1, $c2 );
		if ( $error > $max ) $max = $error;

		return ( $max );
	}
	/*
	 *
	 *	Public functions
	 *
	 */
	function showCartoonfy ( $p_ext, $p_dis ) {
		switch ( strtolower ( $p_ext ) ) {
			case "jpg":
				header ( 'Content-type:image/'.strtolower ( $p_ext ) );
				if ( $p_dis ) {
					header ( 'Content-disposition:attachment;filename='.time( ).'.'.strtolower ( $p_ext ) );
				}
				imageJpeg ( $this->i1 );
				break;
			case "jpeg":
				header ( 'Content-type:image/'.strtolower ( $p_ext ) );
				if ( $p_dis ) {
					header ( 'Content-disposition:attachment;filename='.time( ).'.'.strtolower ( $p_ext ) );
				}
				imageJpeg ( $this->i1 );
				break;
			case "gif":
				header ( 'Content-type:image/'.strtolower ( $p_ext ) );
				if ( $p_dis ) {
					header ( 'Content-disposition:attachment;filename='.time( ).'.'.strtolower ( $p_ext ) );
				}
				imageGif ( $this->i1 );
				break;
			case "png":
				header ( 'Content-type:image/'.strtolower ( $p_ext ) );
				if ( $p_dis ) {
					header ( 'Content-disposition:attachment;filename='.time( ).'.'.strtolower ( $p_ext ) );
				}
				imagePng ( $this->i1 );
				break;
			default:
				print "<b>".$p_ext."</b> is not supported image format!";
				exit;
		}
		imageDestroy ( $this->i1 );
	}
 }
?>