[함수] XenoImage class makeCropThumbnail

[함수] XenoImage class makeCropThumbnail

<?php
// +--------------------------------------------------------+
// | PHP version 5.x                                        |
// +--------------------------------------------------------+
// | License : new BSD                                      |
// +--------------------------------------------------------+
// | Copyright : Song Hyo-Jin <shj at xenosi.de>            |
// +--------------------------------------------------------+
//
// $Id: XenoImage.class.php, 2012. 1. 22. crucify Exp

class XenoImage
{
  public $img, $width, $height;
  public function __construct($filename = false) {
    if($filename) $this->loadImage($filename);
  }
  public function setDir($filename) {
    if(is_dir($filename)) return;
    if(substr($filename, -1) == '/') {
      $dir = $filename;
    } else {
      $dir = dirname($filename);
    }
    if(!file_exists($dir)) mkdir($dir, 0755, true);
  }
  public function loadImage($filename) {
    if(!is_resource($filename)) {
      $mime = getimagesize($filename);
      switch($mime['mime']) {
        case 'image/jpeg':
        $img = imagecreatefromjpeg($filename);
        break;
        case 'image/png':
        $img = imagecreatefrompng($filename);
        break;
        case 'image/gif':
        $img = imagecreatefromgif($filename);
        break;
        default:
        throw new Exception('이미지가 아닙니다.'.$mime['mime']);
      }
    } else $img = $filename;
    $this->width = imagesx($img);
    $this->height = imagesy($img);
    if(!imageistruecolor($img)) {
      $img2 = imagecreatetruecolor($this->width, $this->height);
      imagecopy($img2, $img, 0, 0, 0, 0, $this->width, $this->height);
      imagedestroy($img);
      $img = $img2;
    }
    $this->img = $img;
  }
  public function __destruct() {
    if($this->img != null) imagedestroy($this->img);
  }
  public function makeThumbnail($width, $height, $outfile = false) {
    list($w, $h, $resizeflag) = self::calcScale($this->width, $this->height, $width, $height, true);
    if(!$resizeflag) return $this->saveImage(null, $outfile);
    return $this->saveThumbnail(0, 0, 0, 0, $w, $h, $this->width, $this->height, $outfile);
  }
  public function makeCropThumbnail($width, $height, $outfile = false) {
    list($w, $h, $px, $py, $sw, $sh, $resizeflag) = self::calcScaleCrop($this->width, $this->height, $width, $height);
    if(!$resizeflag) return $this->saveImage(null, $outfile);
    return $this->saveThumbnail(0, 0, $px, $py, $w, $h, $sw, $sh, $outfile);
  }

  private function saveThumbnail($x1, $y1, $x2, $y2, $w1, $h1, $w2, $h2, $outfile) {
    $img = imagecreatetruecolor($w1, $h1);
    imagecopyresampled($img, $this->img, $x1, $y1, $x2, $y2, $w1, $h1, $w2, $h2);

    return $this->saveImage($img, $outfile);
  }
  private function saveImage($img, $outfile = false) {
    $im = ($img == null) ? $this->img : $img;
    if($outfile == false) return $im;
    $this->setDir($outfile);
    switch(strtolower(preg_replace('~^.*\.~', '', $outfile))) {
      case 'jpg':
      case 'jpeg':
      imagejpeg($im, $outfile, 90);
      break;
      case 'png':
      imagepng($im, $outfile);
      break;
      default:
      imagegif($im, $outfile);
      break;
    }
    if($img != null) {
      imagedestroy($img);
      $img = null;
    }
    return true;
  }
  public static function calcScale($w, $h, $cw, $ch, $calczero = false) {
    if($cw == 0) {
      if(!$calczero) {
        if($h <= $ch) return array(0, $h, false);
        return array(0, $ch, true);
      }
      $cw = floor($w * $ch / $h);
      return array($cw, $ch, true);
    }
    if($ch == 0) {
      if(!$calczero) {
        if($w < $cw) return array($w, 0, false);
        return array($cw, 0, true);
      }
      $ch = floor($h * $cw / $w);
      return array($cw, $ch, true);
    }

    list($nw, $nh) = array($w, $h);
    if($w >= $cw || $h >= $ch) {
      $rw = ($w > 0) ? $cw / $w : 0;
      $rh = ($h > 0) ? $ch / $h : 0;
      $r = ($rw > $rh) ? $rh : $rw;
      $nw = floor($w * $r);
      $nh = floor($h * $r);
      $resizeflag = true;
    } else $resizeflag = false;
    return array($nw, $nh, $resizeflag);
  }
  public static function calcScaleCrop($w, $h, $cw, $ch) {
    if($cw == 0 || $ch == 0) {
      return array($cw, $ch, 0, 0, $w, $h, false);
    }

    list($nw, $nh, $px, $py, $sw, $sh) = array($w, $h, 0, 0, $w, $h);
    if($w >= $cw || $h >= $ch) {
      $rw = $cw / $w;
      $rh = $ch / $h;
      $r = ($rw > $rh) ? $rw : $rh;
      $nw = $w * $r;
      $nh = $h * $r;
      $ppx = $nw - $cw;
      $ppy = $nh - $ch;
      $px = ($ppx * $w / $nw) >> 1;
      $py = ($ppy * $h / $nh) >> 1;
      $sw = floor($cw / $r);
      $sh = floor($ch / $r);
      $resizeflag = true;
    } else $resizeflag = false;
    return array($cw, $ch, $px, $py, $sw, $sh, $resizeflag);
  }
}


$img = new XenoImage($_FILES['image']['tmp_name']);
$img->makeCropThumbnail(200, 150, '/home/user/files/'.floor($seq / 1000).'/'.$seq.'croppped.jpg');
$img->makeThumbnail(200, 0, '/home/user/files/'.floor($seq / 1000).'/'.$seq.'resized.jpg');


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