Flutter Engine
font_asset_provider.h
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1 /*
2  * Copyright 2018 Google Inc.
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 
17 #ifndef TXT_FONT_ASSET_PROVIDER_H_
18 #define TXT_FONT_ASSET_PROVIDER_H_
19 
20 #include <string>
21 
22 #include "third_party/skia/include/core/SkFontMgr.h"
23 
24 namespace txt {
25 
27  public:
28  virtual ~FontAssetProvider() = default;
29 
30  virtual size_t GetFamilyCount() const = 0;
31  virtual std::string GetFamilyName(int index) const = 0;
32  virtual SkFontStyleSet* MatchFamily(const std::string& family_name) = 0;
33 
34  protected:
35  static std::string CanonicalFamilyName(std::string family_name);
36 };
37 
38 } // namespace txt
39 
40 #endif // TXT_FONT_ASSET_PROVIDER_H_
virtual size_t GetFamilyCount() const =0
virtual std::string GetFamilyName(int index) const =0
virtual SkFontStyleSet * MatchFamily(const std::string &family_name)=0
static std::string CanonicalFamilyName(std::string family_name)
virtual ~FontAssetProvider()=default