imgresize.php

<?php

function img_resize($mode, $src, $dest, $width, $height, $quality=100)
{
  $dest = getcwd(). $dest;
  $src = getcwd() . "\\" . $src;
  
  //make dir if it isnt exist
  if (!file_exists('.\\images\\cache\\' . $_GET['preset-name'])) {
	mkdir('.\\images\\cache\\' . $_GET['preset-name']);
  } 
  

  if (!file_exists($src)) return false;
  
  $size = getimagesize($src);
  if ($size === false) return false;

  $format = strtolower(substr($size['mime'], strpos($size['mime'], '/')+1));
  $icfunc = "imagecreatefrom" . $format;
  if (!function_exists($icfunc)) return false;

  switch ($mode) {
    case 'IN':
	  $x_ratio = $width / $size[0];
	  $y_ratio = $height / $size[1];

	  $ratio       = min($x_ratio, $y_ratio);
	  $new_width   = floor($size[0] * $ratio);
	  $new_height  = floor($size[1] * $ratio);
	  $left_offset = 0;
	  $top_offset = 0;
	  break;
	case 'OUT':
	  $x_ratio = $size[0] / $width;
	  $y_ratio = $size[1] / $height;

	  $ratio       = min($x_ratio, $y_ratio);
	  $new_width   = floor($width * $ratio);
	  $new_height  = floor($height * $ratio);

	  $left_offset = ($size[0] - $new_width) / 2;
	  $top_offset = ($size[1] - $new_height) / 2;
	  $resize = true;
	  break;
	case 'EXACT':
	  $left_offset = 0;
	  $top_offset = 0;
	  $new_width   = $width;
	  $new_height  = $height;

  }

  $isrc = $icfunc($src);
  $idest = imagecreatetruecolor($new_width, $new_height);
  
  imagecopyresampled($idest, $isrc, 0, 0, $left, $top, 
  $new_width, $new_height, $size[0]-$left_offset*2, $size[1]-$top_offset*2);
  
  if ($resize) {
	$resized = imagecreatetruecolor($width, $height);
	imagecopyresampled($resized , $idest, 0, 0, 0, 0, $width, $height, $new_width, $new_height);
	imagejpeg($resized, $dest, $quality);
	imagedestroy($resized);
  }
  
  else if(!(imagejpeg($idest, $dest, $quality))) return false;

  imagedestroy($isrc);
  imagedestroy($idest);
  
  return true;

}
?>