<?php
/**
 * R&S Imagination Suite
 * Mask Class
 *
 * blah fasel description
 *
 * @author Darius A. Zylka <rs@regen-sonne.de>
 * @copyright (c) 2009 Darius A. Zylka
 * @version 1.0
 * @package phImaginator
 * @subpackage phImaginator_Mask
 */


/**
 * Mask class
 *
 * @package phImaginator
 * @subpackage phImaginator_Mask
 *
 */
abstract class phImaginator_Reflect extends phImaginator_Universal implements phImaginator_Module {


	/**
	 * Defines if the desired method of this class should be used for each source element or for all elements at once
	 *
	 * @access protected
	 * @var bool
	 */
	protected static $runCollected = false;


	public static function common($height = '33%', $margin = 2, $proportion = 1.2, $startOpacity = 90, $transition = TRANSITION_LINEAR) {
		$image_data =& parent::getCurrentResource();

		$computedSizes = parent::computeElementSizes($image_data, false, $height);

		$reflection_height = $computedSizes['h'] / $proportion;
		$destination_height = $image_data['height'] + $reflection_height + $margin;

		$destination = imagecreatetruecolor($image_data['width'], $destination_height);

		imagealphablending($destination, false);
		$bgcol = imagecolorallocatealpha($destination, 255, 0, 255, 127);
		imagefilledrectangle($destination, 0, 0, $image_data['width'], $destination_height, $bgcol);

		imagecopy($destination, $image_data['resource'], 0, 0, 0, 0, $image_data['width'], $image_data['height']);

		$reflection = imagecreatetruecolor($image_data['width'], $reflection_height);

		imagecopyresampled(
			$reflection,
			$image_data['resource'],
			0,
			0,
			0,
			$image_data['height'] - 1,
			$image_data['width'],
			$reflection_height,
			$image_data['width'],
			-($reflection_height * $proportion)
		);


		$startTransparency = 127 - ((127 / 100) * $startOpacity);
		$transLog = (127 - $startTransparency) / log($reflection_height);
		$transEx2 = (127 - $startTransparency) / $reflection_height;

		for ($y = 0; $y <= $reflection_height - 1 + $margin; ++$y) {
			if ($transition == phImaginator::TRANSITION_LINEAR) {

				$transparency = 127 - ((127 / 100) * (($startOpacity / $reflection_height) * ($reflection_height - ($y + 1))));

			} else if ($transition == phImaginator::TRANSITION_LOGARITHMIC) {

				$transparency = log($y + 1) * $transLog + $startTransparency;

			} else if ($transition == phImaginator::TRANSITION_EXPONENTIAL) {

				$transparency = floor(((($y + 1) / (1 / ($y + 1))) / $reflection_height) * $transEx2 + $startTransparency);

			}

			for ($x = 0; $x <= $image_data['width'] - 1; ++$x) {
				$colIndex = imagecolorat($reflection, $x, $y);
				$colours = imagecolorsforindex($reflection, $colIndex);
				$newcol[$x . $y] = imagecolorallocatealpha($destination, $colours['red'], $colours['green'], $colours['blue'], $transparency);
				imagesetpixel($destination, $x, $y + $image_data['height'] + $margin, $newcol[$x . $y]);
			}
		}

		$image_data['resource'] = $destination;

	}
}


?>