fontservices/textshaperplugin/IcuSource/layout/GlyphPosnLookupProc.cpp
changeset 0 1fb32624e06b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fontservices/textshaperplugin/IcuSource/layout/GlyphPosnLookupProc.cpp	Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,151 @@
+/*
+ *
+ * (C) Copyright IBM Corp. 1998 - 2004 - All Rights Reserved
+ *
+ */
+
+#include "LETypes.h"
+#include "LEFontInstance.h"
+#include "OpenTypeTables.h"
+#include "Features.h"
+#include "Lookups.h"
+#include "ScriptAndLanguage.h"
+#include "GlyphDefinitionTables.h"
+#include "GlyphPositioningTables.h"
+#include "SinglePositioningSubtables.h"
+#include "PairPositioningSubtables.h"
+#include "CursiveAttachmentSubtables.h"
+#include "MarkToBasePosnSubtables.h"
+#include "MarkToLigaturePosnSubtables.h"
+#include "MarkToMarkPosnSubtables.h"
+//#include "ContextualPositioningSubtables.h"
+#include "ContextualSubstSubtables.h"
+#include "ExtensionSubtables.h"
+#include "LookupProcessor.h"
+#include "GlyphPosnLookupProc.h"
+#include "LESwaps.h"
+
+U_NAMESPACE_BEGIN
+
+// Aside from the names, the contextual positioning subtables are
+// the same as the contextual substitution subtables.
+typedef ContextualSubstitutionSubtable ContextualPositioningSubtable;
+typedef ChainingContextualSubstitutionSubtable ChainingContextualPositioningSubtable;
+
+GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor(
+        const GlyphPositioningTableHeader *glyphPositioningTableHeader,
+        LETag scriptTag, LETag languageTag, const LETag *featureOrder)
+    : LookupProcessor(
+                      (char *) glyphPositioningTableHeader,
+                      SWAPW(glyphPositioningTableHeader->scriptListOffset),
+                      SWAPW(glyphPositioningTableHeader->featureListOffset),
+                      SWAPW(glyphPositioningTableHeader->lookupListOffset),
+                      scriptTag, languageTag, featureOrder)
+{
+    // anything?
+}
+
+GlyphPositioningLookupProcessor::GlyphPositioningLookupProcessor()
+{
+}
+
+le_uint32 GlyphPositioningLookupProcessor::applySubtable(
+    const LookupSubtable *lookupSubtable, le_uint16 lookupType,
+    GlyphIterator *glyphIterator, const LEFontInstance *fontInstance,
+    LEErrorCode& success) const
+{
+    if (LE_FAILURE(success)) {
+        return 0;
+    }
+
+    le_uint32 delta = 0;
+
+    switch(lookupType)
+    {
+    case 0:
+        break;
+
+    case gpstSingle:
+    {
+        const SinglePositioningSubtable *subtable = (const SinglePositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(glyphIterator, fontInstance);
+        break;
+    }
+
+    case gpstPair:
+    {
+        const PairPositioningSubtable *subtable = (const PairPositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(glyphIterator, fontInstance);
+        break;
+    }
+
+    case gpstCursive:
+    {
+        const CursiveAttachmentSubtable *subtable = (const CursiveAttachmentSubtable *) lookupSubtable;
+
+        delta = subtable->process(glyphIterator, fontInstance);
+        break;
+    }
+
+    case gpstMarkToBase:
+    {
+        const MarkToBasePositioningSubtable *subtable = (const MarkToBasePositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(glyphIterator, fontInstance);
+        break;
+    }
+
+     case gpstMarkToLigature:
+    {
+        const MarkToLigaturePositioningSubtable *subtable = (const MarkToLigaturePositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(glyphIterator, fontInstance);
+        break;
+    }
+
+    case gpstMarkToMark:
+    {
+        const MarkToMarkPositioningSubtable *subtable = (const MarkToMarkPositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(glyphIterator, fontInstance);
+        break;
+    }
+
+   case gpstContext:
+    {
+        const ContextualPositioningSubtable *subtable = (const ContextualPositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(this, glyphIterator, fontInstance, success);
+        break;
+    }
+
+    case gpstChainedContext:
+    {
+        const ChainingContextualPositioningSubtable *subtable = (const ChainingContextualPositioningSubtable *) lookupSubtable;
+
+        delta = subtable->process(this, glyphIterator, fontInstance, success);
+        break;
+    }
+
+    case gpstExtension:
+    {
+        const ExtensionSubtable *subtable = (const ExtensionSubtable *) lookupSubtable;
+
+        delta = subtable->process(this, lookupType, glyphIterator, fontInstance, success);
+        break;
+    }
+
+    default:
+        break;
+    }
+
+    return delta;
+}
+
+GlyphPositioningLookupProcessor::~GlyphPositioningLookupProcessor()
+{
+}
+
+U_NAMESPACE_END