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 pngout. |
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20 | * |
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21 | * @link http://advsys.net/ken/utils.htm#pngout |
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22 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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23 | */ |
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24 | class PngoutFilter implements FilterInterface |
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25 | { |
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26 | // -c# |
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27 | const COLOR_GREY = '0'; |
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28 | const COLOR_RGB = '2'; |
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29 | const COLOR_PAL = '3'; |
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30 | const COLOR_GRAY_ALPHA = '4'; |
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31 | const COLOR_RGB_ALPHA = '6'; |
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32 | |
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33 | // -f# |
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34 | const FILTER_NONE = '0'; |
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35 | const FILTER_X = '1'; |
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36 | const FILTER_Y = '2'; |
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37 | const FILTER_X_Y = '3'; |
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38 | const FILTER_PAETH = '4'; |
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39 | const FILTER_MIXED = '5'; |
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40 | |
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41 | // -s# |
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42 | const STRATEGY_XTREME = '0'; |
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43 | const STRATEGY_INTENSE = '1'; |
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44 | const STRATEGY_LONGEST_MATCH = '2'; |
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45 | const STRATEGY_HUFFMAN_ONLY = '3'; |
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46 | const STRATEGY_UNCOMPRESSED = '4'; |
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47 | |
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48 | private $pngoutBin; |
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49 | private $color; |
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50 | private $filter; |
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51 | private $strategy; |
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52 | private $blockSplitThreshold; |
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53 | |
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54 | /** |
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55 | * Constructor. |
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56 | * |
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57 | * @param string $pngoutBin Path to the pngout binary |
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58 | */ |
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59 | public function __construct($pngoutBin = '/usr/bin/pngout') |
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60 | { |
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61 | $this->pngoutBin = $pngoutBin; |
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62 | } |
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63 | |
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64 | public function setColor($color) |
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65 | { |
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66 | $this->color = $color; |
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67 | } |
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68 | |
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69 | public function setFilter($filter) |
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70 | { |
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71 | $this->filter = $filter; |
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72 | } |
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73 | |
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74 | public function setStrategy($strategy) |
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75 | { |
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76 | $this->strategy = $strategy; |
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77 | } |
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78 | |
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79 | public function setBlockSplitThreshold($blockSplitThreshold) |
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80 | { |
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81 | $this->blockSplitThreshold = $blockSplitThreshold; |
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82 | } |
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83 | |
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84 | public function filterLoad(AssetInterface $asset) |
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85 | { |
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86 | } |
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87 | |
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88 | public function filterDump(AssetInterface $asset) |
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89 | { |
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90 | $pb = new ProcessBuilder(array($this->pngoutBin)); |
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91 | |
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92 | if (null !== $this->color) { |
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93 | $pb->add('-c'.$this->color); |
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94 | } |
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95 | |
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96 | if (null !== $this->filter) { |
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97 | $pb->add('-f'.$this->filter); |
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98 | } |
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99 | |
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100 | if (null !== $this->strategy) { |
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101 | $pb->add('-s'.$this->strategy); |
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102 | } |
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103 | |
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104 | if (null !== $this->blockSplitThreshold) { |
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105 | $pb->add('-b'.$this->blockSplitThreshold); |
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106 | } |
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107 | |
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108 | $pb->add($input = tempnam(sys_get_temp_dir(), 'assetic_pngout')); |
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109 | file_put_contents($input, $asset->getContent()); |
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110 | |
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111 | $output = tempnam(sys_get_temp_dir(), 'assetic_pngout'); |
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112 | unlink($output); |
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113 | $pb->add($output .= '.png'); |
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114 | |
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115 | $proc = $pb->getProcess(); |
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116 | $code = $proc->run(); |
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117 | |
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118 | if (0 < $code) { |
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119 | unlink($input); |
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120 | throw FilterException::fromProcess($proc)->setInput($asset->getContent()); |
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121 | } |
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122 | |
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123 | $asset->setContent(file_get_contents($output)); |
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124 | |
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125 | unlink($input); |
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126 | unlink($output); |
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127 | } |
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128 | } |
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