1 /* 2 * %W% %E% 3 * 4 * (C) Copyright IBM Corp. 2008-2010 - All Rights Reserved 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 18 // read a 32-bit value that might only be 16-bit-aligned in memory 19 #define READ_LONG(code) (le_uint32)((SWAPW(*(le_uint16*)&code) << 16) + SWAPW(*(((le_uint16*)&code) + 1))) 20 21 // FIXME: should look at the format too... maybe have a sub-class for it? 22 le_uint32 ExtensionSubtable::process(const LookupProcessor *lookupProcessor, le_uint16 lookupType, 23 GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const 24 { 25 if (LE_FAILURE(success)) { 26 return 0; 27 } 28 29 le_uint16 elt = SWAPW(extensionLookupType); 30 31 if (elt != lookupType) { 32 le_uint32 extOffset = READ_LONG(extensionOffset); 33 LookupSubtable *subtable = (LookupSubtable *) ((char *) this + extOffset); 34 35 return lookupProcessor->applySubtable(subtable, elt, glyphIterator, fontInstance, success); 36 } 37 38 return 0; 39 } 40 41 U_NAMESPACE_END 42
