<?php

namespace Assetic\Filter;

use Assetic\Asset\AssetInterface;
use Assetic\Util\ProcessBuilder;

/**
 * Runs assets through pngout.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class PngoutFilter implements FilterInterface
{
	const COLOR_GREY = '0';
	const COLOR_RGB = '2';
	const COLOR_PAL = '3';
	const COLOR_GRAY_ALPHA = '4';
	const COLOR_RGB_ALPHA = '6';
	const FILTER_NONE = '0';
	const FILTER_X = '1';
	const FILTER_Y = '2';
	const FILTER_X_Y = '3';
	const FILTER_PAETH = '4';
	const FILTER_MIXED = '5';
	const STRATEGY_XTREME = '0';
	const STRATEGY_INTENSE = '1';
	const STRATEGY_LONGEST_MATCH = '2';
	const STRATEGY_HUFFMAN_ONLY = '3';
	const STRATEGY_UNCOMPRESSED = '4';

	private $pngoutBin;
	private $color;
	private $filter;
	private $strategy;
	private $blockSplitThreshold;


	/**
	 * Constructor.
	 *
	 * @param string $pngoutBin Path to the pngout binary
	 */
	public function __construct($pngoutBin = '/usr/bin/pngout')
	{
		$this->pngoutBin = $pngoutBin;
	}


	public function setColor($color)
	{
		$this->color = $color;
	}


	public function setFilter($filter)
	{
		$this->filter = $filter;
	}


	public function setStrategy($strategy)
	{
		$this->strategy = $strategy;
	}


	public function setBlockSplitThreshold($blockSplitThreshold)
	{
		$this->blockSplitThreshold = $blockSplitThreshold;
	}


	public function filterLoad(AssetInterface $asset)
	{
	}


	public function filterDump(AssetInterface $asset)
	{
		$pb = new ProcessBuilder(array($this->pngoutBin));

		if (null !== $this->color) {
		    $pb->add('-c'.$this->color);
		}

		if (null !== $this->filter) {
		    $pb->add('-f'.$this->filter);
		}

		if (null !== $this->strategy) {
		    $pb->add('-s'.$this->strategy);
		}

		if (null !== $this->blockSplitThreshold) {
		    $pb->add('-b'.$this->blockSplitThreshold);
		}

		$pb->add($input = tempnam(sys_get_temp_dir(), 'assetic_pngout'));
		file_put_contents($input, $asset->getContent());

		$output = tempnam(sys_get_temp_dir(), 'assetic_pngout');
		unlink($output);
		$pb->add($output .= '.png');

		$proc = $pb->getProcess();
		$code = $proc->run();

		if (0 < $code) {
		    unlink($input);
		    throw new \RuntimeException($proc->getErrorOutput());
		}

		$asset->setContent(file_get_contents($output));

		unlink($input);
		unlink($output);
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NjQzNTM5NDAwNDYwNzE1NCA3OTkzNzA2ODkxNDYxMjE2IDU5MDcxODI3Njk4ODcxNDE=