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<?php
# ***** BEGIN LICENSE BLOCK *****
# This file is part of Clearbricks.
# Copyright (c) 2006 Olivier Meunier and contributors. All rights
# reserved.
#
# Clearbricks 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.
#
# Clearbricks 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 Clearbricks; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ***** END LICENSE BLOCK *****
# Some functions taken from BIG
# https://dev.media-box.net/big/
class imageTools
{
public $res;
public function __construct()
{
if (!function_exists('imagegd2')) {
throw new Exception('GD is not installed');
}
$this->res = null;
}
public function loadImage($f)
{
if (!file_exists($f)) {
throw new Exception('Image doest not exists');
}
if (($info = @getimagesize($f)) !== false)
{
switch ($info[2])
{
case 3 :
$this->res = @imagecreatefrompng($f);
break;
case 2 :
$this->res = @imagecreatefromjpeg($f);
break;
case 1 :
$this->res = @imagecreatefromgif($f);
break;
}
}
if (!is_resource($this->res)) {
throw new Exception('Unable to load image');
}
}
public function getW()
{
return imagesx($this->res);
}
public function getH()
{
return imagesy($this->res);
}
function output($type='png',$file=null,$qual=90)
{
if (!$file)
{
header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
header('Pragma: no-cache');
switch (strtolower($type))
{
case 'png' :
header('Content-type: image/png');
imagepng($this->res);
return true;
case 'jpeg' :
case 'jpg':
header('Content-type: image/jpeg');
imagejpeg($this->res,NULL,$qual);
return true;
default :
return false;
}
}
elseif (is_writable(dirname($file)))
{
switch(strtolower($type))
{
case 'png' :
return imagepng($this->res,$file);
case 'jpeg' :
case 'jpg' :
return imagejpeg($this->res,$file,$qual);
default :
return false;
}
}
}
/**
@function resize
Resize image ressource
@param mixed WIDTH Image width (px or percent)
@param mixed HEIGHT Image height (px or percent)
@param string mode Crop mode (force, crop, ratio)
@param boolean EXPAND Allow resize of image
*/
function resize($WIDTH,$HEIGHT,$MODE='ratio',$EXPAND=false)
{
$imgWidth=$this->getW();
$imgHeight=$this->getH();
if(strpos($WIDTH,'%',0))
$WIDTH=$imgWidth*$WIDTH/100;
if(strpos($HEIGHT,'%',0))
$HEIGHT=$imgHeight*$HEIGHT/100;
$ratio=$imgWidth/$imgHeight;
// guess resize ($_w et $_h)
if($MODE=='ratio')
{
$_w=99999;
if($HEIGHT>0)
{
$_h=$HEIGHT;
$_w=$_h*$ratio;
}
if($WIDTH>0 && $_w>$WIDTH)
{
$_w=$WIDTH;
$_h=$_w/$ratio;
}
if(!$EXPAND && $_w>$imgWidth)
{
$_w=$imgWidth;
$_h=$imgHeight;
}
}
else
{
// crop source image
$_w=$WIDTH;
$_h=$HEIGHT;
}
if($MODE=='force')
{
if($WIDTH>0)
$_w=$WIDTH;
else
$_w=$HEIGHT*$ratio;
if($HEIGHT>0)
$_h=$HEIGHT;
else
$_h=$WIDTH/$ratio;
if(!$EXPAND && $_w>$imgWidth)
{
$_w=$imgWidth;
$_h=$imgHeight;
}
$cropW=$imgWidth;
$cropH=$imgHeight;
$decalW=0;
$decalH=0;
}
else
{
// guess real viewport of image
$innerRatio=$_w/$_h;
if($ratio>=$innerRatio)
{
$cropH=$imgHeight;
$cropW=$imgHeight*$innerRatio;
$decalH=0;
$decalW=($imgWidth-$cropW)/2;
}
else
{
$cropW=$imgWidth;
$cropH=$imgWidth/$innerRatio;
$decalW=0;
$decalH=($imgHeight-$cropH)/2;
}
}
$img2=imagecreatetruecolor($_w,$_h);
imagecopyresampled($img2,$this->res,0,0,$decalW,$decalH,$_w,$_h,$cropW,$cropH);
imagedestroy($this->res);
$this->res=$img2;
return true;
}
}
?>