ICU-511.31.tar.gz

[apple/icu.git] / icuSources / layout / OpenTypeLayoutEngine.h

diff --git a/icuSources/layout/OpenTypeLayoutEngine.h b/icuSources/layout/OpenTypeLayoutEngine.h
index eab5832e10b173f5ca7d0cfcad19a1b98b8bb69a..4de80569b28e45ea1208422f2d5d3a9edc0a5462 100644 (file)
--- a/icuSources/layout/OpenTypeLayoutEngine.h
+++ b/icuSources/layout/OpenTypeLayoutEngine.h
@@ -1,5 +1,5 @@
 /*
- * (C) Copyright IBM Corp. 1998-2006 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2009 - All Rights Reserved
  *
  */
 
@@ -55,6 +55,7 @@ public:
      * @param scriptCode - the script
      * @param langaugeCode - the language
      * @param gsubTable - the GSUB table
+     * @param success - set to an error code if the operation fails
      *
      * @see LayoutEngine::layoutEngineFactory
      * @see ScriptAndLangaugeTags.h for script and language codes
@@ -62,7 +63,7 @@ public:
      * @internal
      */
     OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
-                            le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable);
+                            le_int32 typoFlags, const GlyphSubstitutionTableHeader *gsubTable, LEErrorCode &success);
 
     /**
      * This constructor is used when the font requires a "canned" GSUB table which can't be known
@@ -71,11 +72,12 @@ public:
      * @param fontInstance - the font
      * @param scriptCode - the script
      * @param langaugeCode - the language
+     * @param success - set to an error code if the operation fails
      *
      * @internal
      */
     OpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode,
-                        le_int32 typoFlags);
+                        le_int32 typoFlags, LEErrorCode &success);
 
     /**
      * The destructor, virtual for correct polymorphic invocation.
@@ -87,6 +89,8 @@ public:
     /**
      * A convenience method used to convert the script code into
      * the four byte script tag required by OpenType.
+        * For Indic languages where multiple script tags exist,
+        * the version 1 (old style) tag is returned.
      *
      * @param scriptCode - the script code
      *
@@ -95,6 +99,19 @@ public:
      * @internal
      */
     static LETag getScriptTag(le_int32 scriptCode);
+    /**
+     * A convenience method used to convert the script code into
+     * the four byte script tag required by OpenType.
+        * For Indic languages where multiple script tags exist,
+        * the version 2 tag is returned.
+     *
+     * @param scriptCode - the script code
+     *
+     * @return the four byte script tag
+     *
+     * @internal
+     */
+    static LETag getV2ScriptTag(le_int32 scriptCode);
 
     /**
      * A convenience method used to convert the langauge code into
@@ -213,21 +230,20 @@ protected:
      * @internal
      */
     LETag fScriptTag;
-
+  
     /**
-     * The four byte language tag
+     * The four byte script tag for V2 fonts.
      *
      * @internal
      */
-    LETag fLangSysTag;
+    LETag fScriptTagV2;
 
     /**
-     * <code>TRUE</code> if <code>mapCharsToGlyphs</code> should replace ZWJ / ZWNJ with a glyph
-     * with no contours.
+     * The four byte language tag
      *
      * @internal
      */
-    le_bool fFilterZeroWidth;
+    LETag fLangSysTag;
 
     /**
      * This method does the OpenType character processing. It assigns the OpenType feature
@@ -288,6 +304,8 @@ protected:
      */
     virtual le_int32 glyphProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft,
             LEGlyphStorage &glyphStorage, LEErrorCode &success);
+ 
+    virtual le_int32 glyphSubstitution(le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success);
 
     /**
      * This method does any processing necessary to convert "fake"