1 /* 2 * Copyright 2011 Google Inc. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 // File is originally from Chromium third_party/sfntly/src/subsetter. 17 // Use as test case in sfntly so that problems can be caught in upstream early. 18 19 #ifndef SFNTLY_CPP_SRC_TEST_SUBSETTER_IMPL_H_ 20 #define SFNTLY_CPP_SRC_TEST_SUBSETTER_IMPL_H_ 21 22 #include "sfntly/font.h" 23 #include "sfntly/font_factory.h" 24 #include "sfntly/table/truetype/glyph_table.h" 25 #include "sfntly/table/truetype/loca_table.h" 26 #include "sfntly/tag.h" 27 28 namespace sfntly { 29 30 // Smart pointer usage in sfntly: 31 // 32 // sfntly carries a smart pointer implementation like COM. Ref-countable object 33 // type inherits from RefCounted<>, which have AddRef and Release just like 34 // IUnknown (but no QueryInterface). Use a Ptr<> based smart pointer to hold 35 // the object so that the object ref count is handled correctly. 36 // 37 // class Foo : public RefCounted<Foo> { 38 // public: 39 // static Foo* CreateInstance() { 40 // Ptr<Foo> obj = new Foo(); // ref count = 1 41 // return obj.detach(); 42 // } 43 // }; 44 // typedef Ptr<Foo> FooPtr; // common short-hand notation 45 // FooPtr obj; 46 // obj.attach(Foo::CreatedInstance()); // ref count = 1 47 // { 48 // FooPtr obj2 = obj; // ref count = 2 49 // } // ref count = 1, obj2 out of scope 50 // obj.release(); // ref count = 0, object destroyed 51 52 class SubsetterImpl { 53 public: 54 SubsetterImpl(); 55 ~SubsetterImpl(); 56 57 bool LoadFont(const char* font_name, 58 const unsigned char* original_font, 59 size_t font_size); 60 bool LoadFont(int font_index, 61 const unsigned char* original_font, 62 size_t font_size); 63 int SubsetFont(const unsigned int* glyph_ids, 64 size_t glyph_count, 65 unsigned char** output_buffer); 66 67 private: 68 CALLER_ATTACH Font* Subset(const IntegerSet& glyph_ids, 69 GlyphTable* glyf, LocaTable* loca); 70 71 FontFactoryPtr factory_; 72 FontPtr font_; 73 }; 74 75 } // namespace sfntly 76 77 #endif // SFNTLY_CPP_SRC_TEST_SUBSETTER_IMPL_H_ 78