원래 십여년전(?)부터 뜯어고쳐 오며 사용하던 소스를 좀 정리했다.
이전에 GD를 직접 컨트롤 했었는데 조금 찾아보니 WideImage 란 라리브러리가 있기에, 그걸로 바꾸다보니 워낙 기능이 막강해서 정작 내가 만든 클래스는 Wrapping Class가 되어 버렸다 ;;
어쨋든, 밤하늘의 별처럼 널려있는 썸네일 라이브러리들을 마다하고 만든 이유는 단 두가지 이다.
- 썸네일의 종횡비율에 따라 중앙부분을 기준으로 Crop해서 썸네일을 만들어 주는 기능
- PNG포맷에서 Resizing시 원본의 Alpha Channel을 유지 해 주는 기능
그 이외에는 잡다한 기능을 다 빼 버렸다. 복잡해지면 오래 못쓰므로…
Licence : GNU LGPL 2.1
Copyright (C) 2013 Aiden, Kihyun Kim.
if (!class_exists('WideImage')) require_once('WideImage/WideImage.php');
/**
* Thumbnail
*
* @category Thumbnail
* @package Thumbnail
* @copyright 2013 Aiden Kim
* @license GNU LGPL 2.1.
*/
class Thumbnail {
const FIT_INSIDE = 'inside';
const FIT_INSIDE_CROP = 'inside-crop';
const FIT_OUTSIDE = 'outside';
const FIT_FILL = 'fill';
const IMAGETYPE_PNG = IMAGETYPE_PNG;
const IMAGETYPE_JPEG = IMAGETYPE_JPEG;
const IMAGETYPE_GIF = IMAGETYPE_GIF;
const IMAGETYPE_BMP = IMAGETYPE_BMP;
const IMAGETYPE_ICO = IMAGETYPE_ICO;
const IMAGETYPE_AUTO = -1;
static public $ImgExts = array(
self::IMAGETYPE_PNG => 'png'
,self::IMAGETYPE_JPEG => 'jpg'
,self::IMAGETYPE_GIF => 'gif'
,self::IMAGETYPE_BMP => 'bmp'
,self::IMAGETYPE_ICO => 'ico'
);
private $orgImg = null;
private $orgImgPath = null;
private $prop = array(
'ouputType' => self::IMAGETYPE_AUTO
,'outputWidth' => 120
,'outputHeight' => 120
,'ouputFit' => self::FIT_INSIDE
,'useTransparent' => true
,'jpegQuality' => 95 // 1~100 (100 is best)
,'pngCompress' => 3 // 1~9 (1 is best)
,'fileChmod' => -1
);
public function __construct($imgPath=null) {
if ($imgPath) {
$this->load($imgPath);
}
}
public function __destruct() {
if ($this->orgImg && method_exists($this->orgImg,'destroy')) @$this->orgImg->destroy();
unset($this->orgImg);
}
public function __set($name, $value) {
switch ($name) {
case 'useTransparent':
$this->prop[$name] = ($value ? true : false);
break;
case 'ouputFit':
$this->prop[$name] = strval($value);
break;
case 'ouputType':
if (array_key_exists(intval($value), self::$ImgExts))
$this->prop[$name] = intval($value);
break;
case 'outputWidth':
case 'outputHeight':
case 'useTransparent':
case 'jpegQuality':
case 'pngCompress':
case 'fileChmod':
$this->prop[$name] = intval($value);
break;
}
}
public function __get($name) {
switch ($name) {
case 'imgIsValid':
if ($this->orgImg) { return $this->orgImg->isValid(); }
return false;
case 'imgWidth':
if ($this->orgImg) { return $this->orgImg->getWidth(); }
return false;
case 'imgHeight':
if ($this->orgImg) { return $this->orgImg->getHeight(); }
return false;
default:
if (array_key_exists($name, $this->prop)) {
return $this->prop[$name];
}
}
$trace = debug_backtrace();
trigger_error(
'Undefined property via __get(): ' . $name .
' in ' . $trace[0]['file'] .
' on line ' . $trace[0]['line'],
E_USER_NOTICE);
return null;
}
/**
* Load original image file
*
* @param string $imgPath path or url of image file
* @return boolean results
*/
public function load($imgPath) {
$this->orgImgPath = $imgPath;
$this->orgImg = WideImage::loadFromFile($imgPath);
if ((is_null($this->orgImg)) || (!method_exists($this->orgImg,'isValid')) || (!$this->orgImg->isValid())) {
$this->orgImg = null;
$trace = debug_backtrace();
trigger_error(
'Unable to load image file via load(): ' . $imgPath .
' in ' . $trace[0]['file'] .
' on line ' . $trace[0]['line'],
E_USER_NOTICE);
return false;
}
if (($this->orgImg->isTransparent() || $this->orgImg->isTrueColor()) && $this->useTransparent) {
$this->orgImg->alphaBlending = false;
}
return true;
}
/**
* Create thumbnail automatically
*
* @param string|null $imgPath path or url of image file
* @return WideImage_Image thumbnail image handler
*/
public function createThumbnail($imgPath=null) {
if (!is_null($imgPath)) $this->load($imgPath);
if (!$this->orgImg) return false;
if ($this->ouputFit == self::FIT_INSIDE_CROP) {
$imgRatio = $this->imgWidth / $this->imgHeight;
$thumbRatio = $this->outputWidth / $this->outputHeight;
if ($imgRatio > $thumbRatio) {
$cropWidth = $this->imgHeight * $this->outputWidth / $this->outputHeight;
$cropHeight = $this->imgHeight;
$cropLeft = round(($this->imgWidth - $cropWidth) / 2);
$cropTop = 0;
}else if ($imgRatio < $thumbRatio) {
$cropWidth = $this->imgWidth;
$cropHeight = $this->imgWidth * $this->outputHeight / $this->outputWidth;
$cropLeft = 0;
$cropTop = round(($this->imgHeight - $cropHeight) / 2);
}else{
$cropWidth = $this->imgWidth;
$cropHeight = $this->imgHeight;
$cropLeft = 0;
$cropTop = 0;
}
return $this->createCropThumbnail($cropLeft, $cropTop, $cropWidth, $cropHeight);
}else{
$thumbImg = $this->orgImg->resizeDown($this->outputWidth, $this->outputHeight, $this->ouputFit);
if ((!is_null($thumbImg)) && (method_exists($thumbImg,'isValid')) && ($thumbImg->isValid())) {
if (($thumbImg->isTransparent() || $thumbImg->isTrueColor()) && $this->useTransparent) $thumbImg->alphaBlending = false;
return $thumbImg;
}
}
return false;
}
/**
* Create thumbnail manually
*
* @param int|0 $cropLeft crop position x
* @param int|0 $cropTop crop position y
* @param int|0 $cropWidth crop width
* @param int|0 $cropHeight crop height
* @param string|null $imgPath path or url of image file
* @return WideImage_Image thumbnail image handler
*/
public function createCropThumbnail($cropLeft=0, $cropTop=0, $cropWidth=0, $cropHeight=0, $imgPath=null) {
if (($cropWidth <= 0) || ($cropHeight <= 0)) return $this->createThumbnail($imgPath);
if (!is_null($imgPath)) $this->load($imgPath);
if (!$this->orgImg) return false;
// Crop
$cropedImg = $this->orgImg->crop($cropLeft, $cropTop, $cropWidth, $cropHeight);
if ((!is_null($cropedImg)) && (method_exists($cropedImg,'isValid')) && ($cropedImg->isValid())) {
try {
if (($cropedImg->isTransparent() || $cropedImg->isTrueColor()) && $this->useTransparent) $cropedImg->alphaBlending = false;
// Resize
$thumbImg = $cropedImg->resizeDown($this->outputWidth, $this->outputHeight, self::FIT_FILL);
@$cropedImg->destroy(); unset($cropedImg);
if ((!is_null($thumbImg)) && (method_exists($thumbImg,'isValid')) && ($thumbImg->isValid())) {
if (($thumbImg->isTransparent() || $thumbImg->isTrueColor()) && $this->useTransparent) $thumbImg->alphaBlending = false;
return $thumbImg;
}
} catch (Exception $e) {
@$cropedImg->destroy(); unset($cropedImg);
trigger_error(
'Caught the error: ' . $e->getMessage() .
' in ' . $e->getFile() .
' on line ' . $e->getLine() ,
E_USER_NOTICE);
}
}
return false;
}
/**
* Save thumbnail to file
*
* @param WideImage_Image $thumbImg thumbnail image handler
* @param string $thumbPath save path of thumbnail file
* @param int|0 $thumbType image type of thumbnail file
* @return string saved file name
*/
public function saveThumbnail($thumbImg, $thumbPath, $thumbType=null) {
if ($thumbImg && $thumbImg->isValid()) {
try {
if (!is_null($thumbType)) $this->ouputType = $thumbType;
if ($this->ouputType == self::IMAGETYPE_AUTO) {
$thumbType = self::GetImgTypeFromPath($thumbPath);
if ($thumbType !== false) {
if ($thumbType === self::IMAGETYPE_PNG) {
$thumbImg->saveAlpha = true;
$thumbImg->saveToFile($thumbPath, $this->pngCompress);
}else if ($thumbType === self::IMAGETYPE_JPEG) {
$thumbImg->saveToFile($thumbPath, $this->jpegQuality);
}else{
$thumbImg->saveToFile($thumbPath);
}
}
}else{
$thumbType = $this->ouputType;
$thumbPath = self::ReplaceExtByImgType($thumbPath, $thumbType);
if ($thumbPath !== false) {
if ($thumbType === self::IMAGETYPE_PNG) {
$thumbImg->saveAlpha = true;
$thumbImg->saveToFile($thumbPath, $this->pngCompress);
}else if ($thumbType === self::IMAGETYPE_JPEG) {
$thumbImg->saveToFile($thumbPath, $this->jpegQuality);
}else{
$thumbImg->saveToFile($thumbPath);
}
}
}
if ($this->fileChmod >= 0) @chmod($thumbPath, $this->fileChmod);
@$thumbImg->destroy(); unset($thumbImg);
return basename($thumbPath);
} catch (Exception $e) {
@$thumbImg->destroy(); unset($thumbImg);
trigger_error(
'Caught the error: ' . $e->getMessage() .
' in ' . $e->getFile() .
' on line ' . $e->getLine() ,
E_USER_NOTICE);
}
}
return false;
}
/**
* Output image to browser
*
* @param WideImage_Image $thumbImg thumbnail image handler
* @param int|0 $thumbType image type of thumbnail file
* @return boolean results
*/
public function responseThumbnail($thumbImg, $thumbType=null) {
if ($thumbImg && $thumbImg->isValid()) {
try {
if (!is_null($thumbType)) $this->ouputType = $thumbType;
if ($this->ouputType == self::IMAGETYPE_JPEG) {
$thumbImg->output(strtolower(self::$ImgExts[$this->ouputType]), $this->jpegQuality);
}else if ($this->ouputType == self::IMAGETYPE_GIF) {
$thumbImg->output(strtolower(self::$ImgExts[$this->ouputType]));
}else if (($this->ouputType == self::IMAGETYPE_PNG) || ($this->ouputType == self::IMAGETYPE_AUTO)) {
$thumbImg->output(strtolower(self::$ImgExts[self::IMAGETYPE_PNG]), $this->pngCompress);
}else if (array_key_exists($this->ouputType, self::$ImgExts)) {
$thumbImg->output(strtolower(self::$ImgExts[$this->ouputType]));
}
@$thumbImg->destroy(); unset($thumbImg);
return true;
} catch (Exception $e) {
@$thumbImg->destroy(); unset($thumbImg);
trigger_error(
'Caught the error: ' . $e->getMessage() .
' in ' . $e->getFile() .
' on line ' . $e->getLine() ,
E_USER_NOTICE);
}
}
return false;
}
/**
* Save thumbnail to file automatically
*
* @param string $thumbPath save path of thumbnail file
* @param string|null $imgPath path or url of image file
* @param int|null $thumbWidth thumbnail width
* @param int|null $thumbHeight thumbnail height
* @param string|null $thumbFit thumbnail fit type
* @param int|null $thumbType image type of thumbnail file
* @param boolean|null $transparent allow transparent
* @param int|null $jpegQuality jpeg quality 1~100 (100 is best)
* @param int|null $pngCompress png compress level 1~9 (1 is best)
* @return string saved file name
*/
public function createThumbnailFile($thumbPath, $imgPath=null, $thumbWidth=null, $thumbHeight=null,
$thumbFit=null, $thumbType=null, $transparent=null, $jpegQuality=null, $pngCompress=null ) {
if (!is_null($thumbWidth)) $this->outputWidth = $thumbWidth;
if (!is_null($thumbHeight)) $this->outputHeight = $thumbHeight;
if (!is_null($thumbFit)) $this->ouputFit = $thumbFit;
if (!is_null($thumbType)) $this->ouputType = $thumbType;
if (!is_null($transparent)) $this->useTransparent = $transparent;
if (!is_null($jpegQuality)) $this->jpegQuality = $jpegQuality;
if (!is_null($pngCompress)) $this->pngCompress = $pngCompress;
if (!is_null($imgPath)) $this->load($imgPath);
$thumbImg = $this->createThumbnail();
if (!$thumbImg) return false;
return $this->saveThumbnail($thumbImg, $thumbPath);
}
/**
* Save thumbnail to file manually
*
* @param string $thumbPath save path of thumbnail file
* @param int $cropLeft crop position x
* @param int $cropTop crop position y
* @param int $cropWidth crop width
* @param int $cropHeight crop height
* @param string|null $imgPath path or url of image file
* @param int|null $thumbWidth thumbnail width
* @param int|null $thumbHeight thumbnail height
* @param string|null $thumbFit thumbnail fit type
* @param int|null $thumbType image type of thumbnail file
* @param boolean|null $transparent allow transparent
* @param int|null $jpegQuality jpeg quality 1~100 (100 is best)
* @param int|null $pngCompress png compress level 1~9 (1 is best)
* @return string saved file name
*/
public function createCropThumbnailFile($thumbPath, $cropLeft, $cropTop, $cropWidth, $cropHeight, $imgPath=null,
$thumbWidth=null, $thumbHeight=null, $thumbFit=null, $thumbType=null, $transparent=null, $jpegQuality=null, $pngCompress=null ) {
if (!is_null($thumbWidth)) $this->outputWidth = $thumbWidth;
if (!is_null($thumbHeight)) $this->outputHeight = $thumbHeight;
if (!is_null($thumbFit)) $this->ouputFit = $thumbFit;
if (!is_null($thumbType)) $this->ouputType = $thumbType;
if (!is_null($transparent)) $this->useTransparent = $transparent;
if (!is_null($jpegQuality)) $this->jpegQuality = $jpegQuality;
if (!is_null($pngCompress)) $this->pngCompress = $pngCompress;
if (!is_null($imgPath)) $this->load($imgPath);
$thumbImg = $this->createCropThumbnail($cropLeft, $cropTop, $cropWidth, $cropHeight);
if (!$thumbImg) return false;
return $this->saveThumbnail($thumbImg, $thumbPath);
}
/**
* Get image type from path
*
* @param string $path image path
* @return int image type
*/
static public function GetImgTypeFromPath($path) {
$path_parts = pathinfo($path);
if (!is_array($path_parts)) return false;
return array_search(strtolower($path_parts['extension']), self::$ImgExts);
}
/**
* Change save path to image type
*
* @param string $path image path
* @param int $imgType image type
* @return string new path
*/
static public function ReplaceExtByImgType($path, $imgType) {
if (!array_key_exists($imgType, self::$ImgExts)) return false;
$path_parts = pathinfo($path);
return $path_parts['dirname'].DIRECTORY_SEPARATOR.$path_parts['filename'].'.'.strtolower(self::$ImgExts[$imgType]);
}
}