/home/coolpkct/www/websites/cake3.cool.rocks/admin/classes/thumbnail.php
<?php
/**
* Part of SimpleViewer.net portfolio web site package.
*
* @package Showkase
* @author Jack Hardie {@link http://www.jhardie.com}
* @copyright Copyright (c) 2012, SimpleViewer Inc.
*/
defined('SK_ACCESS')||die('<h1>403: Forbidden</h1>');
require_once 'classes'.DIRECTORY_SEPARATOR.'helpers.php';
/**
* Site Navigation
*
* @package Showkase
*/
Class Thumbnail
{
/**
* @var integer thumb width
*/
protected $thumbWidth = THUMB_DISPLAY_SIZE;
/**
* @var integer thumb height
*/
protected $thumbHeight = THUMB_DISPLAY_SIZE;
/**
* @var integer thumb jpg quality
*/
protected $thumbQuality;
/**
* @var instance of site singleton
*/
protected $site;
/**
* constructor
*/
public function __construct($thumbWidth, $thumbHeight, $thumbQuality)
{
$memoryLimit = (ini_get('memory_limit') == '') ? MEMORY_LIMIT_FALLBACK : ini_get('memory_limit');
$this->maxImageBytes = (MEMORY_LIMIT == 0) ? Helpers::getBytes($memoryLimit) : MEMORY_LIMIT * pow(2,20);
if ($thumbWidth > 0) $this->thumbWidth = $thumbWidth;
if ($thumbHeight >0) $this->thumbHeight = $thumbHeight;
$this->thumbQuality = $thumbQuality;
}
/**
* function createThumb creates and saves one thumbnail image.
* thumbnails are always jpegs and always have extension jpg.
*
* @access private
* @return void
* @param string $filePath path to source image
* @param string $thumbPath path to new thumbnail
*/
function createThumb($filePath, $thumbPath)
{
$thumbPath = Helpers::changeFileExtension($thumbPath, 'jpg', array('jpeg', 'JPG', 'JPEG'));
$dimensions = @getimagesize($filePath);
if ($dimensions === false) {
throw new Exception('cannot calculate size of image '.$filePath);
}
// $imageInfo['channels'] is not set for png images so just guess at 3
$channels = 3;
$memoryNeeded = Round(($dimensions[0] * $dimensions[1] * $dimensions['bits'] * $channels / 8 + Pow(2, 16)) * MEMORY_SAFETY_FACTOR);
if ($memoryNeeded > $this->maxImageBytes) {
throw new Exception('uncompressed image '.$filePath.' exceeds '.($this->maxImageBytes/1048576).' MB');
}
$imageWidth = $dimensions[0];
$imageHeight = $dimensions[1];
if ($dimensions[0] == 0 || $dimensions[1] == 0) {
throw new Exception('Zero width or height for '.$filePath);
}
$imageAspect = $dimensions[1]/$dimensions[0];
$thumbAspect = ($this->thumbWidth == 0)
? 1
: $this->thumbHeight/$this->thumbWidth;
if ($imageAspect >= $thumbAspect) {
// thumbnail is full-width
$cropWidth = $imageWidth;
$cropHeight = $imageWidth * $thumbAspect;
$deltaX = 0;
$deltaY = ($imageHeight - $cropHeight)/2;
} else {
// thumbnail is full-height
$cropWidth = $imageHeight / $thumbAspect;
$cropHeight = $imageHeight;
$deltaX = ($imageWidth - $cropWidth)/2;
$deltaY = 0;
}
// get image identifier for source image
switch ($dimensions[2]) {
case IMAGETYPE_GIF :
$imageSrc = @imagecreatefromgif($filePath);
break;
case IMAGETYPE_JPEG :
$imageSrc = @imagecreatefromjpeg($filePath);
break;
case IMAGETYPE_PNG :
$imageSrc = @imagecreatefrompng($filePath);
break;
default :
throw new Exception('Unidentified image type '.$filePath);
}
if ($imageSrc === false) {
throw new Exception('Cannot get image identifier for '.$filePath);
}
// Create an empty thumbnail image.
$imageDest = @imagecreatetruecolor($this->thumbWidth, $this->thumbHeight);
if ($imageDest === false) {
@imagedestroy($imageSrc);
throw new Exception('Cannot create true color image');
}
$grey = imagecolorallocate($imageDest, 192, 192, 192);
imagefill($imageDest, 0, 0, $grey);
try {
if (!@imagecopyresampled($imageDest, $imageSrc, 0, 0, $deltaX, $deltaY, $this->thumbWidth, $this->thumbHeight, $cropWidth, $cropHeight)) {
throw new Exception('Cannot create thumbnail using imagecopyresampled');
}
// save the thumbnail image into a file.
if (!@imagejpeg($imageDest, $thumbPath, $this->thumbQuality)) {
throw new Exception('Cannot save thumbnail');
}
} catch (Exception $e) {
@imagedestroy($imageSrc);
@imagedestroy($imageDest);
unset ($imageSrc, $imageDest);
throw new Exception('Unable to create new thumbnail ('.$e->getMessage().')');
}
// Delete both image resources.
@imagedestroy($imageSrc);
@imagedestroy($imageDest);
unset ($imageSrc, $imageDest);
}
}