ICU-57132.0.1.tar.gz

[apple/icu.git] / icuSources / layout / IndicLayoutEngine.cpp

diff --git a/icuSources/layout/IndicLayoutEngine.cpp b/icuSources/layout/IndicLayoutEngine.cpp
index 92f535417c7dc88e0c023d24389d39b762c07db9..cc9815cf8f553546176ed40503665e3b1bc07ecf 100644 (file)
--- a/icuSources/layout/IndicLayoutEngine.cpp
+++ b/icuSources/layout/IndicLayoutEngine.cpp
@@ -1,8 +1,7 @@
 
 /*
- * @(#)IndicLayoutEngine.cpp   1.3 00/03/15
  *
- * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
  *
  */
 
@@ -17,24 +16,34 @@
 #include "GlyphPositioningTables.h"
 
 #include "GDEFMarkFilter.h"
+#include "LEGlyphStorage.h"
 
 #include "IndicReordering.h"
 
 U_NAMESPACE_BEGIN
 
-const char IndicOpenTypeLayoutEngine::fgClassID=0;
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IndicOpenTypeLayoutEngine)
 
 IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
-                    const GlyphSubstitutionTableHeader *gsubTable)
-    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, gsubTable), fMPreFixups(NULL)
+                                                     le_int32 typoFlags, le_bool version2, const LEReferenceTo<GlyphSubstitutionTableHeader> &gsubTable, LEErrorCode &success)
+    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, gsubTable, success), fMPreFixups(NULL)
 {
-    fFeatureOrder = IndicReordering::getFeatureOrder();
+       if ( version2 ) {
+               fFeatureMap = IndicReordering::getv2FeatureMap(fFeatureMapCount);
+       } else {
+        fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
+       }
+       fFeatureOrder = TRUE;
+    fVersion2 = version2;
+    fFilterZeroWidth = IndicReordering::getFilterZeroWidth(fScriptCode);
 }
 
-IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode)
-    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode), fMPreFixups(NULL)
+IndicOpenTypeLayoutEngine::IndicOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags, LEErrorCode &success)
+    : OpenTypeLayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fMPreFixups(NULL)
 {
-    fFeatureOrder = IndicReordering::getFeatureOrder();
+    fFeatureMap = IndicReordering::getFeatureMap(fFeatureMapCount);
+    fFeatureOrder = TRUE;
+       fVersion2 =  FALSE;
 }
 
 IndicOpenTypeLayoutEngine::~IndicOpenTypeLayoutEngine()
@@ -44,8 +53,8 @@ IndicOpenTypeLayoutEngine::~IndicOpenTypeLayoutEngine()
 
 // Input: characters, tags
 // Output: glyphs, char indices
-le_int32 IndicOpenTypeLayoutEngine::glyphProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, const LETag **featureTags,
-                LEGlyphID *&glyphs, le_int32 *&charIndices, LEErrorCode &success)
+le_int32 IndicOpenTypeLayoutEngine::glyphProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
+                    LEGlyphStorage &glyphStorage, LEErrorCode &success)
 {
     if (LE_FAILURE(success)) {
         return 0;
@@ -56,22 +65,27 @@ le_int32 IndicOpenTypeLayoutEngine::glyphProcessing(const LEUnicode chars[], le_
         return 0;
     }
 
-    le_int32 retCount = OpenTypeLayoutEngine::glyphProcessing(chars, offset, count, max, rightToLeft, featureTags, glyphs, charIndices, success);
+    le_int32 retCount = OpenTypeLayoutEngine::glyphProcessing(chars, offset, count, max, rightToLeft, glyphStorage, success);
 
     if (LE_FAILURE(success)) {
         return 0;
     }
 
-    IndicReordering::adjustMPres(fMPreFixups, glyphs, charIndices);
-
+    if (fVersion2) {
+        IndicReordering::finalReordering(glyphStorage,retCount);
+        IndicReordering::applyPresentationForms(glyphStorage,retCount);
+        OpenTypeLayoutEngine::glyphSubstitution(count,max, rightToLeft, glyphStorage, success);
+    } else {
+        IndicReordering::adjustMPres(fMPreFixups, glyphStorage, success);
+    }
     return retCount;
 }
 
 // Input: characters
 // Output: characters, char indices, tags
 // Returns: output character count
-le_int32 IndicOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool /*rightToLeft*/,
-        LEUnicode *&outChars, le_int32 *&charIndices, const LETag **&featureTags, LEErrorCode &success)
+le_int32 IndicOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
+        LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success)
 {
     if (LE_FAILURE(success)) {
         return 0;
@@ -91,25 +105,31 @@ le_int32 IndicOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[],
         return 0;
     }
 
-    charIndices = LE_NEW_ARRAY(le_int32, worstCase);
-    if (charIndices == NULL) {
+    glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success);
+    glyphStorage.allocateAuxData(success);
+
+    if (LE_FAILURE(success)) {
         LE_DELETE_ARRAY(outChars);
-        success = LE_MEMORY_ALLOCATION_ERROR;
         return 0;
     }
 
-    featureTags = LE_NEW_ARRAY(const LETag *, worstCase);
+    // NOTE: assumes this allocates featureTags...
+    // (probably better than doing the worst case stuff here...)
 
-    if (featureTags == NULL) {
-        LE_DELETE_ARRAY(charIndices);
+    le_int32 outCharCount;
+    if (fVersion2) {
+        outCharCount = IndicReordering::v2process(&chars[offset], count, fScriptCode, outChars, glyphStorage);
+    } else {
+        outCharCount = IndicReordering::reorder(&chars[offset], count, fScriptCode, outChars, glyphStorage, &fMPreFixups, success);
+    }
+
+    if (LE_FAILURE(success)) {
         LE_DELETE_ARRAY(outChars);
-        success = LE_MEMORY_ALLOCATION_ERROR;
         return 0;
     }
 
-    // NOTE: assumes this allocates featureTags...
-    // (probably better than doing the worst case stuff here...)
-    return IndicReordering::reorder(&chars[offset], count, fScriptCode, outChars, charIndices, featureTags, &fMPreFixups);
+    glyphStorage.adoptGlyphCount(outCharCount);
+    return outCharCount;
 }
 
 U_NAMESPACE_END