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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      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 MINIKIN_FONT_STYLE_H
     18 #define MINIKIN_FONT_STYLE_H
     19 
     20 namespace minikin {
     21 
     22 // FontStyle represents style information.
     23 class FontStyle {
     24 public:
     25     enum class Weight : uint16_t {
     26         THIN = 100,
     27         EXTRA_LIGHT = 200,
     28         LIGHT = 300,
     29         NORMAL = 400,
     30         MEDIUM = 500,
     31         SEMI_BOLD = 600,
     32         BOLD = 700,
     33         EXTRA_BOLD = 800,
     34         BLACK = 900,
     35         EXTRA_BLACK = 1000,
     36     };
     37 
     38     enum class Slant : bool {
     39         ITALIC = true,
     40         UPRIGHT = false,
     41     };
     42 
     43     constexpr FontStyle() : FontStyle(Weight::NORMAL, Slant::UPRIGHT) {}
     44     constexpr explicit FontStyle(Weight weight) : FontStyle(weight, Slant::UPRIGHT) {}
     45     constexpr explicit FontStyle(Slant slant) : FontStyle(Weight::NORMAL, slant) {}
     46     constexpr FontStyle(Weight weight, Slant slant)
     47             : FontStyle(static_cast<uint16_t>(weight), slant) {}
     48     constexpr FontStyle(uint16_t weight, Slant slant) : mWeight(weight), mSlant(slant) {}
     49 
     50     constexpr uint16_t weight() const { return mWeight; }
     51     constexpr Slant slant() const { return mSlant; }
     52 
     53     constexpr bool operator==(const FontStyle& other) const {
     54         return weight() == other.weight() && slant() == other.slant();
     55     }
     56 
     57     constexpr uint32_t identifier() const {
     58         return (static_cast<uint32_t>(weight()) << 16) | static_cast<uint32_t>(slant());
     59     }
     60 
     61 private:
     62     uint16_t mWeight;
     63     Slant mSlant;
     64 };
     65 
     66 }  // namespace minikin
     67 
     68 #endif  // MINIKIN_FONT_STYLE_H
     69