GD를 이용한 기본기능 썸네일,CROP,CROP썸네일,텍스트 만들기에 기능추가
Written by munilive on (Updated: )GD Library를 이용한 Thumbnail 생성 클래스입니다.
기본적인 이미지 리사이징 및 리사이징과 동시에 비율에 맞춰 Crop 하는 기능이 있고, 워터마크를 추가 할 수 있습니다. 본 코드는 PHP School의 Tip&Tech 게시판에 올라온 php사랑이님의 게시물을 기본 베이스로 하여 제가 필요한 부분을 일부 수정하였습니다.
원본글: [함수] GD를 이용한 기본기능 썸네일,CROP,CROP썸네일,텍스트 만들기
주된 수정 사항은 기존 워터마크에서 사용될 워터마크 이미지가 캔버스보다 크면 캔버스 이미지의 80%로 이미지를 축소하여 워터마크를 입히도록 변경하였습니다. 워터마크가 캔버스보다 작을 경우에는 그대로 반영이 되며, 워터마크가 찍히는 위치를 지정 할 수 있도록 변경하였습니다.
/** ======================================================
| @Author : 김종관
| @Email : apmsoft@gmail.com
| @HomePage : http://www.apmsoftax.com
| @Editor : Eclipse(default)
| @UPDATE : 2010-02-16
--------------------------------------------------------- */
# purpose : 이미지 효과주기
class ImageGD {
private $filename;
private $im;
private $quality = 100;
private $bgcolor = 0x7fffffff;
private $fontsrc, $fontangle=0, $fontcolor = array(0,0,0), $fontsize = 20, $x=5, $y=5;
# 시작
public function __construct($filename=null){
if(!file_exists($filename) && $filename)
throw new Exception($filename);
$this->filename = $filename;
}
# void 퀄리티 설정
public function setCompressionQuality($quality){
$this->quality = $quality;
}
# 칼라 채우기
public function setFilledrectangle($image,$x1,$y1,$x2,$y2,$color){
if(false === ($im = imagefilledrectangle($image,$x1,$y1,$x2,$y2,$color))) return false;
return $im;
}
# 칼라 채우기 RGB
public function setColorallocate($image,$r,$g,$b){
if(0 > ($im = imagecolorallocate($image,$r,$g,$b))) return false;
return $im;
}
# alpha
public function setAlphablending($image,$boolean=false){
imagealphablending($image, $boolean);
}
# alpha
public function setSavealpha($image,$boolean=false){
imagesavealpha($image, $boolean);
}
public function setFttext($image,$fontcolor,$text){
imagefttext($image,$this->fontsize,$this->fontangle,$this->x,$this->y,$fontcolor,$this->fontsrc,$text);
}
# 폰트 파일 경로 지정
public function setFont($fontsrc){ $this->fontsrc = $fontsrc; }
# 칼라 지정
public function setFontColor($color){ $this->color = $color; }
# 폰트 사이즈
public function setFontSize($pixel){ $this->fontsize = $pixel; }
# 배경칼라
public function setBgColor($bgcolor){ $this->bgcolor = $bgcolor; }
# 폰트 앵글
public function setFontAngle($angle){ $this->fontangle = $angle; }
# x:y 축
public function setXY($x,$y){ $this->x = $x; $this->y = $y; }
# 텍스트 이미지 만들기
public function writeTextImage($width,$height,$text){
$this->im = self::createTrueImage($width,$height);
self::setAlphablending($this->im);
self::setFilledrectangle($this->im,0,0,$width,$height,$this->bgcolor);
$fontcolor = self::setColorallocate($this->im,$this->fontcolor[0],$this->fontcolor[1],$this->fontcolor[2]);
self::setFttext($this->im,$fontcolor,$text);
self::setSavealpha($this->im,true);
}
public function setAntialias($image,$boolean=false){
imageantialias($image,$boolean);
}
public function setTTFText($image,$size,$x,$y,$color,$text){
imagettftext($image,$size,$this->fontangle,$x,$y,$color,$this->fontsrc,$text);
}
# 그림자 입체 텍스트 쓰기
public function writeShadowText($width,$height,$text,$bgRGB=array(255,255,255),$mdRGB=array(128,128,128),$frontRGB=array(0,0,0))
{
$this->im = self::createTrueImage($width,$height);
$bg = self::setColorallocate($this->im,$bgRGB[0],$bgRGB[1],$bgRGB[2]);
$middle = self::setColorallocate($this->im, $mdRGB[0],$mdRGB[1],$mdRGB[2]);
$front = self::setColorallocate($this->im, $frontRGB[0],$frontRGB[1],$frontRGB[2]);
self::setFilledrectangle($this->im,0,0,$width-1,$height-1,$bg);
// Add some shadow to the text
self::setTTFText($this->im,$this->fontsize,$this->x,$this->y,$middle,$text);
// Add the text
self::setTTFText($this->im,$this->fontsize,$this->x - 1,$this->y - 1,$front,$text);
}
# 이미지 위에 텍스트 쓰기
public function combineImageText($width,$height,$text,$filename=null){
$this->im = self::createTrueImage($width,$height);
self::setAntialias($this->im,true);
$fontcolor = self::setColorallocate($this->im,$this->fontcolor[0],$this->fontcolor[1],$this->fontcolor[2]);
$filename = ($filename) $filename : $this->filename;
if(!$filename) throw new Exception(__CLASS__,':'.__METHOD__.':'.__LINE__);
$image = self::readImage($filename);
self::copy($this->im,$image,0,0,0,0,$width,$height);
self::setTTFText($this->im,$this->fontsize,$this->x,$this->y,$fontcolor,$text);
}
# margin_r : 오른쪽 여백, margin_b : 아래여백
# $locate : 1:좌측상단, 3:가운데, 5:우측하단, 0:오른쪽,하단마진 설정값
public function filterWatermarks($marksfilename,$locate=3, $margin_r=10,$margin_b=10){
if(!file_exists($marksfilename))
throw new Exception(__CLASS__.':'.__METHOD__.':'.$marksfilename);
$canvas = self::getImageSize($this->filename);
$overlay = self::getImageSize($marksfilename);
if($canvas->width < $overlay->width) {
$overlay->width = ceil($canvas->width * 0.8);
$overlay->height = ceil($canvas->height * 0.8);
$thumbPath = pathinfo($marksfilename);
$wmthumb = "{$thumbPath[dirname]}/{$thumbPath[filename]}_".$overlay->width."_".$overlay->height.".{$thumbPath[extension]}";
if(!file_exists($wmthumb)) {
$watermark = new ImageGD($marksfilename);
$watermark->thumbnailImage($overlay->width, $overlay->height);
$watermark->write($wmthumb);
}
$marksfilename = $wmthumb;
}
$this->im = self::readImage($this->filename);
self::setAntialias($this->im,true);
$image = self::readImage($marksfilename);
$im_width = imagesx($this->im);
$im_height = imagesy($this->im);
$width = imagesx($image);
$height = imagesy($image);
switch($locate) {
case 1 : // 좌측상단
$im_x = 0;
$im_y = 0;
break;
case 3 : // 가운데
$im_x = ($im_width / 2) - ($width / 2);
$im_y = ($im_height - $height) / 2;
break;
case 5 : // 우측 하단
$im_x = $im_width - $width;
$im_y = $im_height - $height;
break;
default :
$im_x = $im_width - $width - $margin_r;
$im_y = $im_height - $height - $margin_b;
}
self::copy($this->im,$image,$im_x,$im_y,0,0,$width,$height);
}
# void 이미지 자르기 int width,height,x,y
public function cropImage($width,$height,$x,$y){
$this->im = self::createTrueImage($width,$height);
$image = self::readImage($this->filename);
if(self::copy($this->im,$image,0,0,$x,$y,$width,$height) === false)
throw new Exception(__METHOD__);
}
# void 이미지 자르기 (center) int width,height
public function cropThumbnailImage($width,$height){
$imgsize = self::getImageSize($this->filename);
# 조정
$im_x = 0;
$im_y = 0;
$image_x = 0;
$image_y = 0;
$wm = $imgsize->width/$width;
$hm = $imgsize->height/$height;
$h_height = $height/2;
$w_height = $width/2;
if($imgsize->width > $imgsize->height){
$width = $imgsize->width / $hm;
$half_width = $width / 2;
$im_x = -($half_width - $w_height);
}else if(($imgsize->width <$imgsize->height) || ($imgsize->wdith == $imgsize->height)){
$height = $imgsize->height / $wm;
$half_height = $height / 2;
$im_y = $half_height - $h_height;
}
$this->im = self::createTrueImage($width,$height);
$image = self::readImage($this->filename);
if(self::copyResampled($this->im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$imgsize->width,$imgsize->height) === false)
throw new Exception(__METHOD__);
return true;
}
# 썸네일 이미지 만들기 int width, height
public function thumbnailImage($width,$height){
$imgsize = self::getImageSize($this->filename);
# 썸네일 사진 사이즈 설정
if($imgsize->width>$imgsize->height){
$height= ceil(($imgsize->height*$width)/$imgsize->width);
}
else if($imgsize->width<$imgsize->height || $imgsize->width == $imgsize->height){
$width= ceil(($imgsize->width*$height)/$imgsize->height);
}
$this->im = self::createTrueImage($width,$height);
$image = self::readImage($this->filename);
self::setAlphablending($this->im, false);
if(self::copyResampled($this->im, $image, 0,0,0,0,$width,$height,$imgsize->width,$imgsize->height) ===false)
throw new Exception(__METHOD__);
return true;
}
# imagecopy
public function copy($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height){
if(imagecopy($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height) === false) return false;
return true;
}
# imagemerge
public function copyMerge($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$pct){
if(!imagecopymerge($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$pct)) return false;
return true;
}
# imagecopyresampled
public function copyResampled($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$oriwidth,$oriheight){
//self::setSavealpha($im,true);
if(imagecopyresampled($im,$image,$im_x,$im_y,$image_x,$image_y,$width,$height,$oriwidth,$oriheight) ===false) return false;
return true;
}
# void : createtruecolor
public function createTrueImage($width,$height){
return $im = imagecreatetruecolor($width,$height);
}
# void
public function readImage($filename){
$count = strrpos($filename,'.');
$extention = strtolower(substr($filename, $count+1));
switch($extention){
case 'gif': $image = imagecreatefromgif($filename); break;
case 'png': $image = imagecreatefrompng($filename); break;
case 'jpeg':
case 'jpg': $image = imagecreatefromjpeg($filename); break;
default : throw new Exception('i can\'t the image format');
}
return $image;
}
# string filename
public function write($filename){
$count = strrpos($filename,'.');
$extention = strtolower(substr($filename, $count+1));
switch($extention){
case 'gif': imagegif($this->im,$filename); return true; break;
case 'png':
self::setSavealpha($this->im, true);
imagepng($this->im,$filename,($this->quality/10)-1); return true; break;
case 'jpg':
case 'jpeg': imagejpeg($this->im,$filename,$this->quality); return true; break;
default : return false;
}
}
# @ void : GD 버전
public function getVersion(){
if(function_exists('gd_info')){
$info = gd_info();
return preg_replace('/bundled \((.*) compatible\)/','\\1', $info['GD Version']);
}
return false;
}
# 이미지 사이즈
public function getImageSize($filename=null){
$filename = ($filename) $filename : $this->filename;
$img_info = getImageSize($filename);
return json_decode(json_encode(array('width'=>$img_info[0],'height'=>$img_info[1],'mime'=>$img_info['mime'])));
}
# @ void
public function destroy(){
if(is_resource($this->im)) imagedestroy($this->im);
}
public function __destruct(){
self::destroy();
}
}