<?php namespace CodeIgniter\Images;

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014-2018 British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package    CodeIgniter
 * @author     CodeIgniter Dev Team
 * @copyright  2014-2018 British Columbia Institute of Technology (https://bcit.ca/)
 * @license    https://opensource.org/licenses/MIT    MIT License
 * @link       https://codeigniter.com
 * @since      Version 3.0.0
 * @filesource
 */
interface ImageHandlerInterface
{

	/**
	 * Resize the image
	 *
	 * @param int  $width
	 * @param int  $height
	 * @param bool $maintainRatio  If true, will get the closest match possible while keeping aspect ratio true.
	 */
	public function resize(int $width, int $height, bool $maintainRatio = false);

	//--------------------------------------------------------------------

	/**
	 * Crops the image to the desired height and width. If one of the height/width values
	 * is not provided, that value will be set the appropriate value based on offsets and
	 * image dimensions.
	 *
	 * @param int|null $width
	 * @param int|null $height
	 * @param int|null $x       X-axis coord to start cropping from the left of image
	 * @param int|null $y       Y-axis coord to start cropping from the top of image
	 *
	 * @return mixed
	 */
	public function crop(int $width = null, int $height = null, int $x = null, int $y = null);

	//--------------------------------------------------------------------

	/**
	 * Rotates the image on the current canvas.
	 *
	 * @param float $angle
	 *
	 * @return mixed
	 */
	public function rotate(float $angle);

	//--------------------------------------------------------------------

	/**
	 * Flattens transparencies, default white background
	 *
	 * @param int $red
	 * @param int $green
	 * @param int $blue
	 *
	 * @return mixed
	 */
	public function flatten(int $red = 255, int $green = 255, int $blue = 255);
	//--------------------------------------------------------------------

	/**
	 * Reads the EXIF information from the image and modifies the orientation
	 * so that displays correctly in the browser.
	 *
	 * @return ImageHandlerInterface
	 */
	public function reorient();

	//--------------------------------------------------------------------

	/**
	 * Retrieve the EXIF information from the image, if possible. Returns
	 * an array of the information, or null if nothing can be found.
	 *
	 * @param string|null $key  If specified, will only return this piece of EXIF data.
	 *
	 * @return mixed
	 */
	public function getEXIF(string $key = null);

	//--------------------------------------------------------------------

	/**
	 * Combine cropping and resizing into a single command.
	 *
	 * Supported positions:
	 *  - top-left
	 *  - top
	 *  - top-right
	 *  - left
	 *  - center
	 *  - right
	 *  - bottom-left
	 *  - bottom
	 *  - bottom-right
	 *
	 * @param int    $width
	 * @param int    $height
	 * @param string $position
	 *
	 * @return bool
	 */
	public function fit(int $width, int $height, string $position);

	//--------------------------------------------------------------------
}
