1 | <?php |
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15 | class MonoImageFilter |
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16 | { |
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17 | /** |
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18 | * Select CCITT Group 3 or 4 facsimile encoding |
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19 | */ |
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20 | const CCITT_FAX_ENCODE = 'CCITTFaxEncode'; |
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21 | |||
22 | /** |
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23 | * Select Flate (ZIP) compression |
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24 | */ |
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25 | const FLATE_ENCODE = 'FlateEncode'; |
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26 | |||
27 | /** |
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28 | * Select run length encoding |
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29 | */ |
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30 | const RUN_LENGTH_ENCODE = 'RunLengthEncode'; |
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31 | |||
32 | /** |
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33 | * Available monochrome image filter values |
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34 | * |
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35 | * @var string[] |
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36 | */ |
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37 | private static $values = [ |
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38 | self::CCITT_FAX_ENCODE, |
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39 | self::FLATE_ENCODE, |
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40 | self::RUN_LENGTH_ENCODE |
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41 | ]; |
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42 | |||
43 | /** |
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44 | * Get available monochrome image filter values |
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45 | * |
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46 | * @return string[] |
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47 | */ |
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48 | 2 | public static function values() |
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52 | } |
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53 |