129 lines
3.0 KiB
PHP
129 lines
3.0 KiB
PHP
<?php
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/*
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* This file is part of the Assetic package, an OpenSky project.
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*
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* (c) 2010-2012 OpenSky Project Inc
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Assetic\Filter;
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use Assetic\Asset\AssetInterface;
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use Assetic\Exception\FilterException;
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use Symfony\Component\Process\ProcessBuilder;
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/**
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* Runs assets through pngout.
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*
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* @link http://advsys.net/ken/utils.htm#pngout
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* @author Kris Wallsmith <kris.wallsmith@gmail.com>
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*/
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class PngoutFilter implements FilterInterface
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{
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// -c#
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const COLOR_GREY = '0';
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const COLOR_RGB = '2';
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const COLOR_PAL = '3';
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const COLOR_GRAY_ALPHA = '4';
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const COLOR_RGB_ALPHA = '6';
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// -f#
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const FILTER_NONE = '0';
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const FILTER_X = '1';
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const FILTER_Y = '2';
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const FILTER_X_Y = '3';
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const FILTER_PAETH = '4';
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const FILTER_MIXED = '5';
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// -s#
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const STRATEGY_XTREME = '0';
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const STRATEGY_INTENSE = '1';
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const STRATEGY_LONGEST_MATCH = '2';
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const STRATEGY_HUFFMAN_ONLY = '3';
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const STRATEGY_UNCOMPRESSED = '4';
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private $pngoutBin;
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private $color;
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private $filter;
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private $strategy;
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private $blockSplitThreshold;
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/**
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* Constructor.
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*
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* @param string $pngoutBin Path to the pngout binary
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*/
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public function __construct($pngoutBin = '/usr/bin/pngout')
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{
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$this->pngoutBin = $pngoutBin;
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}
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public function setColor($color)
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{
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$this->color = $color;
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}
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public function setFilter($filter)
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{
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$this->filter = $filter;
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}
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public function setStrategy($strategy)
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{
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$this->strategy = $strategy;
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}
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public function setBlockSplitThreshold($blockSplitThreshold)
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{
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$this->blockSplitThreshold = $blockSplitThreshold;
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}
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public function filterLoad(AssetInterface $asset)
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{
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}
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public function filterDump(AssetInterface $asset)
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{
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$pb = new ProcessBuilder(array($this->pngoutBin));
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if (null !== $this->color) {
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$pb->add('-c'.$this->color);
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}
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if (null !== $this->filter) {
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$pb->add('-f'.$this->filter);
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}
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if (null !== $this->strategy) {
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$pb->add('-s'.$this->strategy);
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}
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if (null !== $this->blockSplitThreshold) {
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$pb->add('-b'.$this->blockSplitThreshold);
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}
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$pb->add($input = tempnam(sys_get_temp_dir(), 'assetic_pngout'));
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file_put_contents($input, $asset->getContent());
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$output = tempnam(sys_get_temp_dir(), 'assetic_pngout');
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unlink($output);
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$pb->add($output .= '.png');
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$proc = $pb->getProcess();
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$code = $proc->run();
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if (0 < $code) {
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unlink($input);
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throw FilterException::fromProcess($proc)->setInput($asset->getContent());
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}
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$asset->setContent(file_get_contents($output));
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unlink($input);
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unlink($output);
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}
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}
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