| 1 | <?php |
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| 2 | /* |
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| 3 | * --:: JPEG MetaDatas ::------------------------------------------------------- |
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| 4 | * |
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| 5 | * Author : Grum |
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| 6 | * email : grum at piwigo.org |
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| 7 | * website : http://photos.grum.fr |
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| 8 | * |
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| 9 | * << May the Little SpaceFrog be with you ! >> |
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| 10 | * |
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| 11 | * |
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| 12 | * +-----------------------------------------------------------------------+ |
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| 13 | * | JpegMetaData - a PHP based Jpeg Metadata manager | |
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| 14 | * +-----------------------------------------------------------------------+ |
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| 15 | * | Copyright(C) 2010 Grum - http://www.grum.fr | |
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| 16 | * +-----------------------------------------------------------------------+ |
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| 17 | * | This program is free software; you can redistribute it and/or modify | |
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| 18 | * | it under the terms of the GNU General Public License as published by | |
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| 19 | * | the Free Software Foundation | |
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| 20 | * | | |
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| 21 | * | This program is distributed in the hope that it will be useful, but | |
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| 22 | * | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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| 23 | * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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| 24 | * | General Public License for more details. | |
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| 25 | * | | |
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| 26 | * | You should have received a copy of the GNU General Public License | |
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| 27 | * | along with this program; if not, write to the Free Software | |
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| 28 | * | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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| 29 | * | USA. | |
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| 30 | * +-----------------------------------------------------------------------+ |
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| 31 | * |
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| 32 | * |
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| 33 | * ----------------------------------------------------------------------------- |
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| 34 | * |
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| 35 | * The SegmentReader is a generic class providing methods to manage datas |
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| 36 | * segments |
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| 37 | * |
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| 38 | * ----------------------------------------------------------------------------- |
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| 39 | * |
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| 40 | * .. Notes .. |
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| 41 | * |
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| 42 | * This class is not declared as an abstract class, but it's not recommanded to |
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| 43 | * create object with it. |
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| 44 | * |
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| 45 | * |
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| 46 | * Derived classes : |
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| 47 | * - TiffReader (for Tiff data block) |
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| 48 | * |
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| 49 | * This class provides theses public functions : |
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| 50 | * - getIsValid |
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| 51 | * - getIsLoaded |
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| 52 | * |
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| 53 | * ----------------------------------------------------------------------------- |
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| 54 | */ |
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| 55 | |
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| 56 | class SegmentReader |
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| 57 | { |
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| 58 | protected $data = null; |
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| 59 | protected $isValid = false; |
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| 60 | protected $isLoaded = false; |
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| 61 | |
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| 62 | /** |
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| 63 | * The constructor need the segment's datas |
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| 64 | * |
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| 65 | * @param Data $data : a Data object |
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| 66 | */ |
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| 67 | function __construct(Data $data) |
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| 68 | { |
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| 69 | $this->data = $data; |
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| 70 | $this->data->seek(); |
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| 71 | } |
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| 72 | |
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| 73 | /** |
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| 74 | * return true if the segment is valid |
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| 75 | * |
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| 76 | * @return Boolean |
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| 77 | */ |
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| 78 | public function getIsValid() |
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| 79 | { |
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| 80 | return($this->isValid); |
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| 81 | } |
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| 82 | |
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| 83 | /** |
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| 84 | * return true if the segment is loaded |
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| 85 | * |
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| 86 | * @return Boolean |
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| 87 | */ |
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| 88 | public function getIsLoaded() |
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| 89 | { |
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| 90 | return($this->isLoaded); |
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| 91 | } |
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| 92 | |
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| 93 | public function toString() |
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| 94 | { |
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| 95 | $returned=""; |
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| 96 | return($returned); |
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| 97 | } |
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| 98 | |
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| 99 | } |
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| 100 | |
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| 101 | |
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| 102 | ?> |
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