<?php
class agooImage
{
	private $file;
	private $image;
	private $info;
	public function __construct($file)
	{
		if (file_exists($file)) {
			$this->file  = $file;
			$info        = getimagesize($file);
			$this->info  = array(
				'width' => $info[0],
				'height' => $info[1],
				'bits' => $info['bits'],
				'mime' => $info['mime']
			);
			$this->image = $this->create($file);
		} //file_exists($file)
		else {
			exit('Error: Could not load image ' . $file . '!');
		}
	}
	private function create($image)
	{
		$mime = $this->info['mime'];
		if ($mime == 'image/gif') {
			return imagecreatefromgif($image);
		} //$mime == 'image/gif'
		elseif ($mime == 'image/png') {
			return imagecreatefrompng($image);
		} //$mime == 'image/png'
			elseif ($mime == 'image/jpeg') {
			return imagecreatefromjpeg($image);
		} //$mime == 'image/jpeg'
	}
	public function save($file, $quality = 90)
	{
		$info      = pathinfo($file);
		$extension = strtolower($info['extension']);
		if (is_resource($this->image)) {
			if ($extension == 'jpeg' || $extension == 'jpg') {
				imagejpeg($this->image, $file, $quality);
			} //$extension == 'jpeg' || $extension == 'jpg'
			elseif ($extension == 'png') {
				imagepng($this->image, $file);
			} //$extension == 'png'
				elseif ($extension == 'gif') {
				imagegif($this->image, $file);
			} //$extension == 'gif'
			imagedestroy($this->image);
		} //is_resource($this->image)
	}
	public function resize($width = 0, $height = 0, $default = 'i')
	{
		if (!$this->info['width'] || !$this->info['height']) {
			return;
		} //!$this->info['width'] || !$this->info['height']
		$xpos    = 0;
		$ypos    = 0;
		$scale   = 1;
		$scale_w = $width / $this->info['width'];
		$scale_h = $height / $this->info['height'];
		if ($default == 'i') {
			$prop_source = $this->info['width'] / $this->info['height'];
			$prop_output = $width / $height;
			if ($prop_source > 1 && $prop_output > 1) {
				$default = 'w';
			} //$prop_source > 1 && $prop_output > 1
			if ($prop_source > 1 && $prop_output < 1) {
				$default = 'h';
			} //$prop_source > 1 && $prop_output < 1
			if ($prop_source < 1 && $prop_output > 1) {
				$default = 'w';
			} //$prop_source < 1 && $prop_output > 1
			if ($prop_source < 1 && $prop_output < 1) {
				$default = 'h';
			} //$prop_source < 1 && $prop_output < 1
		} //$default == 'i'
		if ($default == 'w') {
			$scale = $scale_w;
		} //$default == 'w'
		elseif ($default == 'h') {
			$scale = $scale_h;
		} //$default == 'h'
		else {
			$scale = min($scale_w, $scale_h);
		}
		if ($scale == 1 && $scale_h == $scale_w && $this->info['mime'] != 'image/png') {
			return;
		} //$scale == 1 && $scale_h == $scale_w && $this->info['mime'] != 'image/png'
		$new_width   = ceil($this->info['width'] * $scale);
		$new_height  = ceil($this->info['height'] * $scale);
		$xpos        = floor(($width - $new_width) / 2);
		$ypos        = floor(($height - $new_height) / 2);
		$image_old   = $this->image;
		$this->image = imagecreatetruecolor($width, $height);
		if (isset($this->info['mime']) && $this->info['mime'] == 'image/png') {
			imagealphablending($this->image, false);
			imagesavealpha($this->image, true);
			$background = imagecolorallocatealpha($this->image, 255, 255, 255, 127);
			imagecolortransparent($this->image, $background);
		} //isset($this->info['mime']) && $this->info['mime'] == 'image/png'
		else {
			$background = imagecolorallocate($this->image, 255, 255, 255);
		}
		imagefilledrectangle($this->image, 0, 0, $width, $height, $background);
		imagecopyresampled($this->image, $image_old, $xpos - 1, $ypos - 1, 0, 0, $new_width + 3, $new_height + 3, $this->info['width'], $this->info['height']);
		imagedestroy($image_old);
		$this->info['width']  = $width;
		$this->info['height'] = $height;
	}
	public function watermark($file, $position = 'bottomright')
	{
		$watermark        = $this->create($file);
		$watermark_width  = imagesx($watermark);
		$watermark_height = imagesy($watermark);
		switch ($position) {
			case 'topleft':
				$watermark_pos_x = 0;
				$watermark_pos_y = 0;
				break;
			case 'topright':
				$watermark_pos_x = $this->info['width'] - $watermark_width;
				$watermark_pos_y = 0;
				break;
			case 'bottomleft':
				$watermark_pos_x = 0;
				$watermark_pos_y = $this->info['height'] - $watermark_height;
				break;
			case 'bottomright':
				$watermark_pos_x = $this->info['width'] - $watermark_width;
				$watermark_pos_y = $this->info['height'] - $watermark_height;
				break;
		} //$position
		imagecopy($this->image, $watermark, $watermark_pos_x, $watermark_pos_y, 0, 0, 120, 40);
		imagedestroy($watermark);
	}
	public function crop($top_x, $top_y, $bottom_x, $bottom_y)
	{
		$image_old   = $this->image;
		$this->image = imagecreatetruecolor($bottom_x - $top_x, $bottom_y - $top_y);
		imagecopy($this->image, $image_old, 0, 0, $top_x, $top_y, $this->info['width'], $this->info['height']);
		imagedestroy($image_old);
		$this->info['width']  = $bottom_x - $top_x;
		$this->info['height'] = $bottom_y - $top_y;
	}
	public function rotate($degree, $color = 'FFFFFF')
	{
		$rgb                  = $this->html2rgb($color);
		$this->image          = imagerotate($this->image, $degree, imagecolorallocate($this->image, $rgb[0], $rgb[1], $rgb[2]));
		$this->info['width']  = imagesx($this->image);
		$this->info['height'] = imagesy($this->image);
	}
	private function filter($filter)
	{
		imagefilter($this->image, $filter);
	}
	private function text($text, $x = 0, $y = 0, $size = 5, $color = '000000')
	{
		$rgb = $this->html2rgb($color);
		imagestring($this->image, $size, $x, $y, $text, imagecolorallocate($this->image, $rgb[0], $rgb[1], $rgb[2]));
	}
	private function merge($file, $x = 0, $y = 0, $opacity = 100)
	{
		$merge        = $this->create($file);
		$merge_width  = imagesx($image);
		$merge_height = imagesy($image);
		imagecopymerge($this->image, $merge, $x, $y, 0, 0, $merge_width, $merge_height, $opacity);
	}
	private function html2rgb($color)
	{
		if ($color[0] == '#') {
			$color = substr($color, 1);
		} //$color[0] == '#'
		if (strlen($color) == 6) {
			list($r, $g, $b) = array(
				$color[0] . $color[1],
				$color[2] . $color[3],
				$color[4] . $color[5]
			);
		} //strlen($color) == 6
		elseif (strlen($color) == 3) {
			list($r, $g, $b) = array(
				$color[0] . $color[0],
				$color[1] . $color[1],
				$color[2] . $color[2]
			);
		} //strlen($color) == 3
		else {
			return false;
		}
		$r = hexdec($r);
		$g = hexdec($g);
		$b = hexdec($b);
		return array(
			$r,
			$g,
			$b
		);
	}
}
?>