1 files changed, 135 insertions, 0 deletions
diff --git a/cpp/src/sfntly/table/bitmap/index_sub_table_format4.h b/cpp/src/sfntly/table/bitmap/index_sub_table_format4.h
new file mode 100644
index 0000000..efd540f
--- /dev/null
+++ b/cpp/src/sfntly/table/bitmap/index_sub_table_format4.h
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_FORMAT4_H_
+#define SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_FORMAT4_H_
+
+#include "sfntly/table/bitmap/index_sub_table.h"
+
+namespace sfntly {
+
+class IndexSubTableFormat4 : public IndexSubTable,
+                             public RefCounted<IndexSubTableFormat4> {
+ public:
+  class CodeOffsetPair {
+   public:
+    int32_t glyph_code() const { return glyph_code_; }
+    int32_t offset() const { return offset_; }
+
+   protected:
+    CodeOffsetPair(int32_t glyph_code, int32_t offset);
+
+    // TODO(arthurhsu): C++ style guide prohibits protected members.
+    int32_t glyph_code_;
+    int32_t offset_;
+  };
+
+  class CodeOffsetPairBuilder : public CodeOffsetPair {
+   public:
+    CodeOffsetPairBuilder();
+    CodeOffsetPairBuilder(int32_t glyph_code, int32_t offset);
+    void set_glyph_code(int32_t v) { glyph_code_ = v; }
+    void set_offset(int32_t v) { offset_ = v; }
+  };
+
+  class CodeOffsetPairGlyphCodeComparator {
+   public:
+    bool operator()(const CodeOffsetPair& lhs, const CodeOffsetPair& rhs);
+  };
+
+  class Builder : public IndexSubTable::Builder,
+                  public RefCounted<Builder> {
+   public:
+    class BitmapGlyphInfoIterator
+        : public RefIterator<BitmapGlyphInfo, Builder, IndexSubTable::Builder> {
+     public:
+      explicit BitmapGlyphInfoIterator(Builder* container);
+      virtual ~BitmapGlyphInfoIterator() {}
+
+      virtual bool HasNext();
+      CALLER_ATTACH virtual BitmapGlyphInfo* Next();
+
+     private:
+      int32_t code_offset_pair_index_;
+    };
+
+    virtual ~Builder();
+    virtual int32_t NumGlyphs();
+    virtual int32_t GlyphLength(int32_t glyph_id);
+    virtual int32_t GlyphStartOffset(int32_t glyph_id);
+    CALLER_ATTACH virtual BitmapGlyphInfoIterator* GetIterator();
+
+    virtual CALLER_ATTACH FontDataTable* SubBuildTable(ReadableFontData* data);
+    virtual void SubDataSet();
+    virtual int32_t SubDataSizeToSerialize();
+    virtual bool SubReadyToSerialize();
+    virtual int32_t SubSerialize(WritableFontData* new_data);
+
+    void Revert();
+    void SetOffsetArray(const std::vector<CodeOffsetPairBuilder>& pair_array);
+
+    static CALLER_ATTACH Builder* CreateBuilder();
+    static CALLER_ATTACH Builder* CreateBuilder(ReadableFontData* data,
+                                                int32_t index_sub_table_offset,
+                                                int32_t first_glyph_index,
+                                                int32_t last_glyph_index);
+    static CALLER_ATTACH Builder* CreateBuilder(WritableFontData* data,
+                                                int32_t index_sub_table_offset,
+                                                int32_t first_glyph_index,
+                                                int32_t last_glyph_index);
+   private:
+    Builder();
+    Builder(WritableFontData* data,
+            int32_t first_glyph_index,
+            int32_t last_glyph_index);
+    Builder(ReadableFontData* data,
+            int32_t first_glyph_index,
+            int32_t last_glyph_index);
+    std::vector<CodeOffsetPairBuilder>* GetOffsetArray();
+    void Initialize(ReadableFontData* data);
+    int32_t FindCodeOffsetPair(int32_t glyph_id);
+
+    static int32_t DataLength(ReadableFontData* data,
+                              int32_t index_sub_table_offset,
+                              int32_t first_glyph_index,
+                              int32_t last_glyph_index);
+
+    std::vector<CodeOffsetPairBuilder> offset_pair_array_;
+  };
+
+  virtual ~IndexSubTableFormat4();
+
+  virtual int32_t NumGlyphs();
+  virtual int32_t GlyphStartOffset(int32_t glyph_id);
+  virtual int32_t GlyphLength(int32_t glyph_id);
+
+ private:
+  IndexSubTableFormat4(ReadableFontData* data,
+                       int32_t first_glyph_index,
+                       int32_t last_glyph_index);
+
+  int32_t FindCodeOffsetPair(int32_t glyph_id);
+  static int32_t NumGlyphs(ReadableFontData* data, int32_t table_offset);
+
+  friend class Builder;
+};
+typedef Ptr<IndexSubTableFormat4> IndexSubTableFormat4Ptr;
+typedef Ptr<IndexSubTableFormat4::Builder> IndexSubTableFormat4BuilderPtr;
+typedef std::vector<IndexSubTableFormat4::CodeOffsetPairBuilder>
+            CodeOffsetPairBuilderList;
+}  // namespace sfntly
+
+#endif  // SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_FORMAT4_H_