PK

<?php
/*
 * File: SimpleImage.php
 * Author: Simon Jarvis
 * Copyright: 2006 Simon Jarvis
 * Date: 08/11/06
 * Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details:
 * http://www.gnu.org/licenses/gpl.html
 *
 */
class SimpleImage {

	private $image;
	private $image_type;
	public function load($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);
		}
	}

	public function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 75, $permissions = null) {
		if ($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, $permissions);
		}
	}
	public function output($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);
		}
	}
	public function getWidth() {
		return imagesx($this->image);
	}
	public function getHeight() {
		return imagesy($this->image);
	}
	public function resizeToHeight($height) {
		$ratio = $height/$this->getHeight();
		$width = $this->getWidth()*$ratio;
		$this->resize($width, $height);
	}
	public function resizeToWidth($width) {
		$ratio  = $width/$this->getWidth();
		$height = $this->getheight()*$ratio;
		$this->resize($width, $height);
	}
	public function scale($scale) {
		$width  = $this->getWidth()*$scale/100;
		$height = $this->getheight()*$scale/100;
		$this->resize($width, $height);
	}
	public function resize($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;
	}
}
?>

PK 99