1 // © 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html#License 3 /* 4 ******************************************************************************* 5 * Copyright (C) 1998-2004, International Business Machines Corporation and * 6 * others. All Rights Reserved. * 7 ******************************************************************************* 8 * 9 * Created on Dec 3, 2003 10 * 11 ******************************************************************************* 12 */ 13 package com.ibm.icu.dev.tool.layout; 14 15 16 public /*abstract*/ class Lookup 17 { 18 private int lookupType; 19 private int lookupFlags; 20 private LookupSubtable[] subtables; 21 private int subtableCount; 22 23 // Lookup flags 24 public final static int LF_ReservedBit = 0x0001; 25 public final static int LF_IgnoreBaseGlyphs = 0x0002; 26 public final static int LF_IgnoreLigatures = 0x0004; 27 public final static int LF_IgnoreMarks = 0x0008; 28 public final static int LF_ReservedMask = 0x00F0; 29 public final static int LF_MarkAttachTypeMask = 0xFF00; 30 public final static int LF_MarkAttachTypeShift = 8; 31 32 // GSUB lookup types 33 public final static int GSST_Single = 1; 34 public final static int GSST_Multiple = 2; 35 public final static int GSST_Alternate = 3; 36 public final static int GSST_Ligature = 4; 37 public final static int GSST_Context = 5; 38 public final static int GSST_ChainingContext = 6; 39 40 // GPOS lookup types 41 public final static int GPST_Single = 1; 42 public final static int GPST_Pair = 2; 43 public final static int GPST_Cursive = 3; 44 public final static int GPST_MarkToBase = 4; 45 public final static int GPST_MarkToLigature = 5; 46 public final static int GPST_MarkToMark = 6; 47 public final static int GPST_Context = 7; 48 public final static int GPST_ChainingContext = 8; 49 Lookup(int theLookupType, int theLookupFlags)50 public Lookup(int theLookupType, int theLookupFlags) 51 { 52 lookupType = theLookupType; 53 lookupFlags = theLookupFlags; 54 55 subtables = new LookupSubtable[10]; 56 subtableCount = 0; 57 } 58 addSubtable(LookupSubtable subtable)59 public void addSubtable(LookupSubtable subtable) 60 { 61 if (subtableCount >= subtables.length) { 62 LookupSubtable[] newSubtables = new LookupSubtable[subtables.length + 5]; 63 64 System.arraycopy(subtables, 0, newSubtables, 0, subtables.length); 65 subtables = newSubtables; 66 } 67 68 subtables[subtableCount] = subtable; 69 subtableCount += 1; 70 } 71 writeLookup(OpenTypeTableWriter writer)72 public void writeLookup(OpenTypeTableWriter writer) 73 { 74 int lookupBase = writer.getOutputIndex(); 75 76 writer.writeData(lookupType); 77 writer.writeData(lookupFlags); 78 writer.writeData(subtableCount); 79 80 int subtableOffset = writer.getOutputIndex(); 81 82 for (int i = 0; i < subtableCount; i += 1) { 83 writer.writeData(0); 84 } 85 86 for (int i = 0; i < subtableCount; i += 1) { 87 writer.fixOffset(subtableOffset++, lookupBase); 88 subtables[i].writeLookupSubtable(writer); 89 } 90 } 91 }