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-rw-r--r--Build/source/libs/icu/icu-xetex/layout/ContextualGlyphSubstProc.cpp79
1 files changed, 79 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-xetex/layout/ContextualGlyphSubstProc.cpp b/Build/source/libs/icu/icu-xetex/layout/ContextualGlyphSubstProc.cpp
new file mode 100644
index 00000000000..94c4a60b075
--- /dev/null
+++ b/Build/source/libs/icu/icu-xetex/layout/ContextualGlyphSubstProc.cpp
@@ -0,0 +1,79 @@
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "MorphTables.h"
+#include "StateTables.h"
+#include "MorphStateTables.h"
+#include "SubtableProcessor.h"
+#include "StateTableProcessor.h"
+#include "ContextualGlyphSubstProc.h"
+#include "LEGlyphStorage.h"
+#include "LESwaps.h"
+
+U_NAMESPACE_BEGIN
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor)
+
+ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const MorphSubtableHeader *morphSubtableHeader)
+ : StateTableProcessor(morphSubtableHeader)
+{
+ contextualGlyphSubstitutionHeader = (const ContextualGlyphSubstitutionHeader *) morphSubtableHeader;
+ substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset);
+
+ entryTable = (const ContextualGlyphSubstitutionStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset);
+}
+
+ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor()
+{
+}
+
+void ContextualGlyphSubstitutionProcessor::beginStateTable()
+{
+ markGlyph = 0;
+}
+
+ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
+{
+ const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index];
+ ByteOffset newState = SWAPW(entry->newStateOffset);
+ le_int16 flags = SWAPW(entry->flags);
+ WordOffset markOffset = SWAPW(entry->markOffset);
+ WordOffset currOffset = SWAPW(entry->currOffset);
+
+ if (markOffset != 0) {
+ const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2);
+ LEGlyphID mGlyph = glyphStorage[markGlyph];
+ TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(mGlyph)]);
+
+ glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
+ }
+
+ if (currOffset != 0) {
+ const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2);
+ LEGlyphID thisGlyph = glyphStorage[currGlyph];
+ TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(thisGlyph)]);
+
+ glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
+ }
+
+ if (flags & cgsSetMark) {
+ markGlyph = currGlyph;
+ }
+
+ if (!(flags & cgsDontAdvance)) {
+ // should handle reverse too!
+ currGlyph += 1;
+ }
+
+ return newState;
+}
+
+void ContextualGlyphSubstitutionProcessor::endStateTable()
+{
+}
+
+U_NAMESPACE_END