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1 /* |
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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3 * |
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4 * This code is free software; you can redistribute it and/or modify it |
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5 * under the terms of the GNU General Public License version 2 only, as |
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6 * published by the Free Software Foundation. Sun designates this |
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7 * particular file as subject to the "Classpath" exception as provided |
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8 * by Sun in the LICENSE file that accompanied this code. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file that |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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19 * |
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20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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21 * CA 95054 USA or visit www.sun.com if you need additional information or |
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22 * have any questions. |
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23 * |
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24 */ |
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25 |
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26 /* |
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27 * |
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28 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved |
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29 * |
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30 */ |
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31 |
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32 #ifndef __LOOKUPTABLES_H |
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33 #define __LOOKUPTABLES_H |
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34 |
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35 #include "LETypes.h" |
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36 #include "LayoutTables.h" |
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37 |
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38 enum LookupTableFormat |
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39 { |
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40 ltfSimpleArray = 0, |
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41 ltfSegmentSingle = 2, |
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42 ltfSegmentArray = 4, |
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43 ltfSingleTable = 6, |
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44 ltfTrimmedArray = 8 |
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45 }; |
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46 |
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47 typedef le_int16 LookupValue; |
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48 |
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49 struct LookupTable |
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50 { |
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51 le_int16 format; |
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52 }; |
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53 |
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54 struct LookupSegment |
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55 { |
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56 TTGlyphID lastGlyph; |
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57 TTGlyphID firstGlyph; |
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58 LookupValue value; |
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59 }; |
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60 |
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61 struct LookupSingle |
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62 { |
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63 TTGlyphID glyph; |
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64 LookupValue value; |
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65 }; |
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66 |
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67 struct BinarySearchLookupTable : LookupTable |
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68 { |
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69 le_int16 unitSize; |
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70 le_int16 nUnits; |
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71 le_int16 searchRange; |
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72 le_int16 entrySelector; |
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73 le_int16 rangeShift; |
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74 |
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75 const LookupSegment *lookupSegment(const LookupSegment *segments, LEGlyphID glyph) const; |
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76 |
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77 const LookupSingle *lookupSingle(const LookupSingle *entries, LEGlyphID glyph) const; |
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78 }; |
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79 |
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80 struct SimpleArrayLookupTable : LookupTable |
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81 { |
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82 LookupValue valueArray[ANY_NUMBER]; |
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83 }; |
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84 |
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85 struct SegmentSingleLookupTable : BinarySearchLookupTable |
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86 { |
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87 LookupSegment segments[ANY_NUMBER]; |
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88 }; |
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89 |
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90 struct SegmentArrayLookupTable : BinarySearchLookupTable |
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91 { |
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92 LookupSegment segments[ANY_NUMBER]; |
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93 }; |
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94 |
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95 struct SingleTableLookupTable : BinarySearchLookupTable |
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96 { |
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97 LookupSingle entries[ANY_NUMBER]; |
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98 }; |
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99 |
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100 struct TrimmedArrayLookupTable : LookupTable |
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101 { |
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102 TTGlyphID firstGlyph; |
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103 TTGlyphID glyphCount; |
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104 LookupValue valueArray[ANY_NUMBER]; |
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105 }; |
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106 |
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107 #endif |