4 * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
9 #include "LayoutEngine.h"
10 #include "OpenTypeLayoutEngine.h"
11 #include "IndicLayoutEngine.h"
12 #include "ScriptAndLanguageTags.h"
14 #include "GlyphSubstitutionTables.h"
15 #include "GlyphDefinitionTables.h"
16 #include "GlyphPositioningTables.h"
18 #include "GDEFMarkFilter.h"
19 #include "LEGlyphStorage.h"
21 #include "IndicReordering.h"
25 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IndicOpenTypeLayoutEngine)
27 IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
28 le_int32 typoFlags, le_bool version2, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success)
29 : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success), fMPreFixups(NULL)
32 fFeatureMap = IndicReordering::getv2FeatureMap(fFeatureMapCount);
34 fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
38 fFilterZeroWidth = IndicReordering::getFilterZeroWidth(fScriptCode);
41 IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
42 : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fMPreFixups(NULL)
44 fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
49 IndicOpenTypeLayoutEngine::~IndicOpenTypeLayoutEngine()
54 // Input: characters, tags
55 // Output: glyphs, char indices
56 le_int32 IndicOpenTypeLayoutEngine::glyphProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
57 LEGlyphStorage &glyphStorage, LEErrorCode &success)
59 if (LE_FAILURE(success)) {
63 if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
64 success = LE_ILLEGAL_ARGUMENT_ERROR;
68 le_int32 retCount = OpenTypeLayoutEngine::glyphProcessing(chars, offset, count, max, rightToLeft, glyphStorage, success);
70 if (LE_FAILURE(success)) {
75 IndicReordering::finalReordering(glyphStorage,retCount);
76 IndicReordering::applyPresentationForms(glyphStorage,retCount);
77 OpenTypeLayoutEngine::glyphSubstitution(count,max, rightToLeft, glyphStorage, success);
79 IndicReordering::adjustMPres(fMPreFixups, glyphStorage, success);
85 // Output: characters, char indices, tags
86 // Returns: output character count
87 le_int32 IndicOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
88 LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success)
90 if (LE_FAILURE(success)) {
94 if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
95 success = LE_ILLEGAL_ARGUMENT_ERROR;
99 le_int32 worstCase = count * IndicReordering::getWorstCaseExpansion(fScriptCode);
101 outChars = LE_NEW_ARRAY(LEUnicode, worstCase);
103 if (outChars == NULL) {
104 success = LE_MEMORY_ALLOCATION_ERROR;
108 glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
109 glyphStorage.allocateAuxData(success);
111 if (LE_FAILURE(success)) {
112 LE_DELETE_ARRAY(outChars);
116 // NOTE: assumes this allocates featureTags...
117 // (probably better than doing the worst case stuff here...)
119 le_int32 outCharCount;
121 outCharCount = IndicReordering::v2process(&chars[offset], count, fScriptCode, outChars, glyphStorage);
123 outCharCount = IndicReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage, &fMPreFixups, success);
126 if (LE_FAILURE(success)) {
127 LE_DELETE_ARRAY(outChars);
131 glyphStorage.adoptGlyphCount(outCharCount);