1 | <?php |
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2 | |
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3 | /* |
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4 | * This file is part of the Assetic package, an OpenSky project. |
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5 | * |
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6 | * (c) 2010-2012 OpenSky Project Inc |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |
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12 | namespace Assetic\Filter; |
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13 | |
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14 | use Assetic\Asset\AssetInterface; |
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15 | use Assetic\Exception\FilterException; |
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16 | use Symfony\Component\Process\ProcessBuilder; |
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17 | |
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18 | /** |
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19 | * Runs assets through OptiPNG. |
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20 | * |
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21 | * @link http://optipng.sourceforge.net/ |
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22 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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23 | */ |
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24 | class OptiPngFilter implements FilterInterface |
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25 | { |
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26 | private $optipngBin; |
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27 | private $level; |
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28 | |
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29 | /** |
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30 | * Constructor. |
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31 | * |
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32 | * @param string $optipngBin Path to the optipng binary |
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33 | */ |
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34 | public function __construct($optipngBin = '/usr/bin/optipng') |
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35 | { |
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36 | $this->optipngBin = $optipngBin; |
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37 | } |
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38 | |
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39 | public function setLevel($level) |
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40 | { |
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41 | $this->level = $level; |
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42 | } |
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43 | |
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44 | public function filterLoad(AssetInterface $asset) |
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45 | { |
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46 | } |
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47 | |
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48 | public function filterDump(AssetInterface $asset) |
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49 | { |
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50 | $pb = new ProcessBuilder(array($this->optipngBin)); |
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51 | |
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52 | if (null !== $this->level) { |
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53 | $pb->add('-o')->add($this->level); |
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54 | } |
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55 | |
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56 | $pb->add('-out')->add($output = tempnam(sys_get_temp_dir(), 'assetic_optipng')); |
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57 | unlink($output); |
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58 | |
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59 | $pb->add($input = tempnam(sys_get_temp_dir(), 'assetic_optipng')); |
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60 | file_put_contents($input, $asset->getContent()); |
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61 | |
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62 | $proc = $pb->getProcess(); |
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63 | $code = $proc->run(); |
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64 | |
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65 | if (0 < $code) { |
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66 | unlink($input); |
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67 | throw FilterException::fromProcess($proc)->setInput($asset->getContent()); |
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68 | } |
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69 | |
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70 | $asset->setContent(file_get_contents($output)); |
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71 | |
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72 | unlink($input); |
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73 | unlink($output); |
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74 | } |
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75 | } |
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