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Current File : /srv/http/vyvoj.adent.cz/vyvoj/_moto-tech.cz/class/class.img2thumb.php
<?php

/**
*	class Image2Thumbnail
*   Thumbnail creation with PHP4 and GDLib 2.0.1 !
*
*
*   @author     Andreas Martens <heyn@plautdietsch.de>
*   @author     Patrick Teague <webdude@veslach.com>
*	@version	1.0a
*   @date       modified 03/13/2003
*   @modifications - added support for reading gif images - makes jpg thumbnails
*        changed several groups of 'if' statements to single 'switch' statements
*        commented out original code so modification could be identified.
*/

class Img2Thumb	{
// New modification
/**
*	private variables - do not use
*
*	@var int $bg_red				0-255 - red color variable for background filler
*	@var int $bg_green			0-255 - green color variable for background filler
*	@var int $bg_blue				0-255 - blue color variable for background filler
*	@var int $maxSize				0-1 - true/false - should thumbnail be filled to max pixels
*/
	var $bg_red;
	var $bg_green;
	var $bg_blue;
	var $maxSize;
	var $rezim = 'all';

/**
*   Constructor - requires following vars:
*
*	@param string $filename			image path
*
*	These are additional vars:
*
*	@param int $newxsize			new maximum image width
*	@param int $newysize			new maximum image height
*	@param string $fileout		output image path
*	@param int $thumbMaxSize	whether thumbnail should have background fill to make it exactly $newxsize x $newysize
*	@param int $bgred				  0-255 - red color variable for background filler
*	@param int $bggreen				0-255 - green color variable for background filler
*	@param int $bgblue				0-255 - blue color variable for background filler
*	@param int $w-ratio
*	@param int $h-ratio
*/
	function Img2Thumb($filename, $newxsize=60, $newysize=60, $fileout='',
		$rezim = 'all', $bgred=0, $bggreen=0, $bgblue=0, $wrate=6, $hrate=5)
	{
		global $HTTP_POST_VARS, $HTTP_GET_VARS, $HTTP_COOKIE_VARS;

		if (isset($HTTP_COOKIE_VARS))
			$httpvars = $HTTP_COOKIE_VARS;
		else if (isset($HTTP_POST_VARS))
			$httpvars =  $HTTP_POST_VARS;
   		else if (isset($HTTP_GET_VARS))
   			$httpvars =  $HTTP_GET_VARS;


//	New modification - checks color int to be sure within range

		if($bgred>=0 || $bgred<=255)
		{
			$this->bg_red = $bgred;
		}
		else
		{
			$this->bg_red = 0;
		}
		if($bggreen>=0 || $bggreen<=255)
		{
			$this->bg_green = $bggreen;
		}
		else
		{
			$this->bg_green = 0;
		}
		if($bgblue>=0 || $bgblue<=255)
		{
			$this->bg_blue = $bgblue;
		}
		else
		{
			$this->bg_blue = 0;
		}

    $this->rezim = $rezim;
    $this->img_bg = !empty($img_bg) ? $img_bg : '';

		if($this->rezim == 'rate') {

		  $this->wrate = $wrate;
		  $this->hrate = $hrate;

		}




// ***************************

	}

/**
*
*	private function - do not call
*
*/
	function NewImgCreate($filename,$newxsize,$newysize,$fileout)
	{
		$type = $this->GetImgType($filename);

		/* Original code removed in favor of 'switch' statement
		if ($type=="png")
		{
			 $orig_img = imagecreatefrompng($filename);
		}
		if ($type=="jpg")
		{
			 $orig_img = imagecreatefromjpeg($filename);
		}
		*/
		switch($type)
		{
			case "gif":
				// unfortunately this function does not work on windows
				// via the precompiled php installation :(
				// it should work on all other systems however.
				if( function_exists("imagecreatefromgif") )
				{
					$orig_img = @imagecreatefromgif($filename);
					break;
				}
				else
				{
					print( "sorry, this server doesn't support <b>imagecreatefromgif()</b>" );
					exit;
					break;
				}
			case "jpg":

				$orig_img = imagecreatefromjpeg($filename);
				break;
			case "png":
				$orig_img = @imagecreatefrompng($filename);
				break;
		}


// ***************************

// Test na validitu obrazku
if (!$orig_img) {

  return FALSE;

}
// ***************************


		$new_img =$this->NewImgResize($orig_img,$newxsize,$newysize,$filename);

		if (!empty($fileout))
		{
			 $this-> NewImgSave($new_img,$fileout,$type);
		}
		else
		{
			 $this->NewImgShow($new_img,$type);
		}

		ImageDestroy($new_img);
		ImageDestroy($orig_img);

// ***************************

// Navratove hodnoty
return TRUE;
	}

	/**
*
*	private function - do not call
*	includes function ImageCreateTrueColor and ImageCopyResampled which are available only under GD 2.0.1 or higher !
*/
	function NewImgResize($orig_img,$newxsize,$newysize,$filename)
	{
		//getimagesize returns array
		// [0] = width in pixels
		// [1] = height in pixels
		// [2] = type
		// [3] = img tag "width=xx height=xx" values

		$orig_size = getimagesize($filename);

		$maxX = $newxsize;
		$maxY = $newysize;

		//osy zdroje
    $srcX = $srcY = 0;

		$srcSizeX = $orig_size[0];
		$srcSizeY = $orig_size[1];

// ***************************

// Nezvetsovat obrazek!
if ($orig_size[0] < $newxsize)
	$newxsize = $orig_size[0];
if ($orig_size[1] < $newysize)
	$newysize = $orig_size[1];
// ***************************

    //specialni rezim height
    //width < height
    if($this->rezim == 'height' && $orig_size[0]<$orig_size[1]) {

			$newxsize = $newysize * ($orig_size[0]/$orig_size[1]);
			$adjustX = ($maxX - $newxsize)/2;
			$adjustY = 0;

    }
    //width > height
    elseif($this->rezim == 'height') {

	  	$newxsize = $newysize * ($orig_size[0]/$orig_size[1]);
		  $adjustY = 0;
		  $adjustX = ($maxY - $newysize)/2;

    }

    //specialni rezim width
    //width < height
    elseif($this->rezim == 'width' && $orig_size[0]<$orig_size[1]) {

			$newysize = $newxsize / ($orig_size[0]/$orig_size[1]);
			$adjustX = ($maxX - $newxsize)/2;
			$adjustY = 0;


    }
    //width > height
    elseif($this->rezim == 'width') {
	  	$newysize = $newxsize / ($orig_size[0]/$orig_size[1]);
		  $adjustY = 0;
		  $adjustX = ($maxY - $newysize)/2;


    }

    //specialni rezim - orizne na pomer stran
    //width < height
    elseif ($this->rezim == 'rate' && $orig_size[0]<$orig_size[1]) {

			$newysize = $newxsize / ($this->wrate / $this->hrate);
			$adjustX = 0;
			$adjustY = ($maxY - $newysize)/2;


			$hledej = 1;

			for($i = 0; $hledej ; $i ++) {


        $srcSizeY = (($orig_size[0] - $i) / $this->wrate) * $this->hrate;
		  	$srcY = ($orig_size[1] - $srcSizeY ) / 2;

        if($srcX >= 0) {

          $hledej = 0;

        }

      }


    //  echo $srcSizeY . "<br >";
   //   echo $srcSizeX . "<br >";

		//	echo $srcY = ($orig_size[1] - $srcSizeY ) / 2;

		//	echo $newxsize. " width / " . $newysize . " height";
	//		$srcY = ($orig_size[1] - $newysize) / 2;
	//		echo $srcY. " Y / " . $srcX . " X";
    }

    //width > height
    elseif($this->rezim == 'rate') {

			$newysize = $newxsize / ($this->wrate / $this->hrate);
			$adjustX = 0;
			$adjustY = ($maxY - $newysize)/2;

			$hledej = 1;

			for($i = 0; $hledej ; $i ++) {

        $srcSizeX = (($orig_size[1] - $i) / $this->hrate) * $this->wrate;
		  	$srcX = ($orig_size[0] - $srcSizeX ) / 2;

        if($srcX >= 0) {

          $hledej = 0;

        }

      }


		//	echo $newxsize. " width / " . $newysize . " height" . "<br >";
		//	echo $srcY. " Y / " . $srcX . " X";
    }



		//normalni - > zmensi se podle nejdelsi strany
    elseif ($orig_size[0]<$orig_size[1])
		{
			$newxsize = $newysize * ($orig_size[0]/$orig_size[1]);
			$adjustX = ($maxX - $newxsize)/2;
			$adjustY = 0;
		}
		else
		{
			$newysize = $newxsize / ($orig_size[0]/$orig_size[1]);
			$adjustX = 0;
			$adjustY = ($maxY - $newysize)/2;
		}

		/* Original code removed to allow for maxSize thumbnails
		$im_out = ImageCreateTrueColor($newxsize,$newysize);
		ImageCopyResampled($im_out, $orig_img, 0, 0, 0, 0,
			$newxsize, $newysize,$orig_size[0], $orig_size[1]);
		*/

//	New modification - creates new image at maxSize
		if( $this->maxSize )
		{


			$im_out = ImageCreateTrueColor($maxX,$maxY);
			$bgfill = imagecolorallocate( $im_out, $this->bg_red, $this->bg_green, $this->bg_blue );
			imagefill( $im_out, 0,0, $bgfill );
			ImageCopyResampled($im_out, $orig_img, $adjustX, $adjustY, $srcX, $srcY,
				$newxsize, $newysize,$srcSizeX , $srcSizeY);

    }
//	Need to image fill just in case image is transparent, don't always want black background
		else
		{
			$im_out = ImageCreateTrueColor($newxsize,$newysize);
			$bgfill = imagecolorallocate( $im_out, $this->bg_red, $this->bg_green, $this->bg_blue );
			imagefill( $im_out, 0,0, $bgfill );
			ImageCopyResampled($im_out, $orig_img, 0, 0, $srcX, $srcY, $newxsize, $newysize, $srcSizeX , $srcSizeY );
      // ImageCopyResized($im_out,$orig_img,0,0,$srcX, $srcY,$newxsize, $newysize, $srcSizeX , $srcSizeY);
			ImageInterlace($im_out, 1);

		}
		return $im_out;
	}

	/**
*
*	private function - do not call
*
*/
	function NewImgSave($new_img,$fileout,$type)
	{
		/* Original code removed in favor of 'switch' statement
		if ($type=="png")
		{
			if (substr($fileout,strlen($fileout)-4,4)!=".png")
				$fileout .= ".png";
			 return imagepng($new_img,$fileout);
		}
		if ($type=="jpg")
		{
			if (substr($fileout,strlen($fileout)-4,4)!=".jpg")
				$fileout .= ".jpg";
			 return imagejpeg($new_img,$fileout);
		}
		*/
		switch($type)
		{
			case "gif":
				if( function_exists("imagegif") )
				{
					if (StrToLower(substr($fileout,strlen($fileout)-4,4)) != ".gif" )
						$fileout .= ".gif";
					return imagegif($new_img,$fileout);
					break;
				}
				else
					$this->NewImgSave( $new_img, $fileout, "jpg" );
			case "jpg":
				if (substr($fileout,strlen($fileout)-4,4)!=".jpg")
					$fileout .= ".jpg";
				return imagejpeg($new_img,$fileout);
				break;
			case "png":
				if (substr($fileout,strlen($fileout)-4,4)!=".png")
					$fileout .= ".png";
				return imagepng($new_img,$fileout);
				break;
		}
	}

	/**
*
*	private function - do not call
*
*/
	function NewImgShow($new_img,$type)
	{
		/* Original code removed in favor of 'switch' statement
		if ($type=="png")
		{
			header ("Content-type: image/png");
			 return imagepng($new_img);
		}
		if ($type=="jpg")
		{
			header ("Content-type: image/jpeg");
			 return imagejpeg($new_img);
		}
		*/
		switch($type)
		{
			case "gif":
				if( function_exists("imagegif") )
				{
					header ("Content-type: image/gif");
					return imagegif($new_img);
					break;
				}
				else
					$this->NewImgShow( $new_img, "jpg" );
			case "jpg":
				header ("Content-type: image/jpeg");
				return imagejpeg($new_img);
				break;
			case "png":
				header ("Content-type: image/png");
				return imagepng($new_img);
				break;
		}
	}

	/**
*
*	private function - do not call
*
*   1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF,
*   5 = PSD, 6 = BMP,
*   7 = TIFF(intel byte order),
*   8 = TIFF(motorola byte order),
*   9 = JPC, 10 = JP2, 11 = JPX,
*   12 = JB2, 13 = SWC, 14 = IFF
*/
	function GetImgType($filename)
	{
		$size = getimagesize($filename);
		/* Original code removed in favor of 'switch' statement
		if($size[2]==2)
			return "jpg";
		elseif($size[2]==3)
			return "png";
		*/
		switch($size[2])
		{
			case 1:
				return "gif";
				break;
			case 2:
				return "jpg";
				break;
			case 3:
				return "png";
				break;
		}
	}

}

?>