<?

class UploadImage {
	var $image;
	var $image_type;
	var $resized_width;
	var $resized_height;
	
	function load($filename) {
		$image_info = getimagesize($filename);
		$this->image_type = $image_info[2];
		if ($this->image_type == IMAGETYPE_JPEG) {
			$this->image = imagecreatefromjpeg($filename);
		} elseif ($this->image_type == IMAGETYPE_GIF) {
			$this->image = imagecreatefromgif($filename);
		} elseif ($this->image_type == IMAGETYPE_PNG) {
			$this->image = imagecreatefrompng($filename);
		}
	}
	
	function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 100, $permissions = null) {
		if ($image_type == IMAGETYPE_JPEG) {
			imagejpeg($this->image, $filename, $compression);
		} elseif ($image_type == IMAGETYPE_GIF) {
			imagegif($this->image, $filename);
		} elseif ($image_type == IMAGETYPE_PNG) {
			imagepng($this->image, $filename);
		}
		if ($permissions != null) {
			chmod($filename, $permissions);
		}
	}
	
	function output($image_type = IMAGETYPE_JPEG) {
		if ($image_type == IMAGETYPE_JPEG) {
			imagejpeg($this->image);
		} elseif ($image_type == IMAGETYPE_GIF) {
			imagegif($this->image);
		} elseif ($image_type == IMAGETYPE_PNG) {
			imagepng($this->image);
		}
	}
	
	function getWidth() {
		return imagesx($this->image);
	}
	
	function getHeight() {
		return imagesy($this->image);
	}
	
	function resizeToHeight($height) {
		$ratio = $height / $this->getHeight();
		$width = $this->getWidth() * $ratio;
		$this->resize($width, $height);
	}
	
	function resizeToWidth($width) {
		$ratio  = $width / $this->getWidth();
		$height = $this->getheight() * $ratio;
		$this->resize($width, $height);
	}
	
	function resizeToWidthMaxHeight($width,$maxheight) {
		$ratio  = $width / $this->getWidth();
		$height = $this->getheight() * $ratio;
		if($height>$maxheight){$height=$maxheight;}
		$this->resize($width, $height);
	}
	
	function scale($scale) {
		$width  = $this->getWidth() * $scale / 100;
		$height = $this->getheight() * $scale / 100;
		$this->resize($width, $height);
	}

	function resize($width, $height) {
		$new_image = imagecreatetruecolor($width, $height);
		if ($this->image_type == IMAGETYPE_GIF || $this->image_type == IMAGETYPE_PNG) {
			$current_transparent = imagecolortransparent($this->image);
			if ($current_transparent != -1) {
				$transparent_color = imagecolorsforindex($this->image, $current_transparent);
				$current_transparent = imagecolorallocate($new_image, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
				imagefill($new_image, 0, 0, $current_transparent);
				imagecolortransparent($new_image, $current_transparent);
			} elseif ($this->image_type == IMAGETYPE_PNG) {
				imagealphablending($new_image, false);
				$color = imagecolorallocatealpha($new_image, 0, 0, 0, 127);
				imagefill($new_image, 0, 0, $color);
				imagesavealpha($new_image, true);
			}
		}
		imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
		$this->image = $new_image;
		$this->resized_width  = $width;
		$this->resized_height = $height;
	}
	
	function watermark($filename) {
		$file_type = strtolower(end(explode('.', $filename)));
		if ($file_type == "jpeg" || $file_type == "jpg") {
			$watermark_image = imagecreatefromjpeg($filename);
			$do_mark = true;
		} elseif ($file_type == "gif") {
			$watermark_image = imagecreatefromgif($filename);
			$do_mark = true;
		} elseif ($file_type == "png") {
			$watermark_image = imagecreatefrompng($filename);
			$do_mark = true;
		}
		
		if ($do_mark == true) {
			imagecopy($this->image, $watermark_image, $this->resized_width - 130, $this->resized_height - 30, 0, 0, imagesx($watermark_image), imagesy($watermark_image));
		}
	}
}
?>