projects / apple / icu.git / blame
| Commit | Line | Data |
|---|---|---|
| b75a7d8f A |
1 | /* |
| 2 | * %W% %E% | |
| 3 | * | |
| 57a6839d | 4 | * (C) Copyright IBM Corp. 2008-2013 - All Rights Reserved |
| b75a7d8f A |
5 | * |
| 6 | */ | |
| 7 | ||
| 8 | #include "LETypes.h" | |
| 9 | #include "OpenTypeTables.h" | |
| 10 | #include "GlyphSubstitutionTables.h" | |
| 11 | #include "LookupProcessor.h" | |
| 12 | #include "ExtensionSubtables.h" | |
| 13 | #include "GlyphIterator.h" | |
| 14 | #include "LESwaps.h" | |
| 15 | ||
| 16 | U_NAMESPACE_BEGIN | |
| 17 | ||
| 729e4ab9 | 18 | // read a 32-bit value that might only be 16-bit-aligned in memory |
| 4388f060 A |
19 | static inline le_uint32 READ_LONG(le_uint32 code) { |
| 20 | le_uint16* first = ((le_uint16*)&code); | |
| 21 | le_uint16* second = (((le_uint16*)&code) + 1); | |
| 22 | return (le_uint32)((SWAPW(*first) << 16) + SWAPW(*second)); | |
| 23 | } | |
| b75a7d8f A |
24 | |
| 25 | // FIXME: should look at the format too... maybe have a sub-class for it? | |
| 26 | le_uint32 ExtensionSubtable::process(const LookupProcessor *lookupProcessor, le_uint16 lookupType, | |
| 729e4ab9 | 27 | GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const |
| b75a7d8f | 28 | { |
| 57a6839d A |
29 | const LEReferenceTo<ExtensionSubtable> thisRef(lookupProcessor->getReference(), success); // create a reference to this |
| 30 | ||
| 729e4ab9 A |
31 | if (LE_FAILURE(success)) { |
| 32 | return 0; | |
| 33 | } | |
| 34 | ||
| b75a7d8f A |
35 | le_uint16 elt = SWAPW(extensionLookupType); |
| 36 | ||
| 4388f060 | 37 | if (elt != lookupType) { |
| 729e4ab9 | 38 | le_uint32 extOffset = READ_LONG(extensionOffset); |
| 57a6839d | 39 | LEReferenceTo<LookupSubtable> subtable(thisRef, success, extOffset); |
| b75a7d8f | 40 | |
| 57a6839d A |
41 | if(LE_SUCCESS(success)) { |
| 42 | return lookupProcessor->applySubtable(subtable, elt, glyphIterator, fontInstance, success); | |
| 43 | } | |
| b75a7d8f A |
44 | } |
| 45 | ||
| 46 | return 0; | |
| 47 | } | |
| 48 | ||
| 49 | U_NAMESPACE_END |