| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * 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 MINIKIN_MINIKIN_FONT_H |
| #define MINIKIN_MINIKIN_FONT_H |
| |
| #include <cstdint> |
| #include <memory> |
| #include <vector> |
| |
| #include "minikin/FontVariation.h" |
| |
| namespace minikin { |
| |
| class FontFakery; |
| struct MinikinExtent; |
| struct MinikinPaint; |
| struct MinikinRect; |
| |
| // An abstraction for platform fonts, allowing Minikin to be used with |
| // multiple actual implementations of fonts. |
| class MinikinFont { |
| public: |
| MinikinFont() {} |
| |
| virtual ~MinikinFont() {} |
| |
| virtual float GetHorizontalAdvance(uint32_t glyph_id, const MinikinPaint& paint, |
| const FontFakery& fakery) const = 0; |
| virtual void GetHorizontalAdvances(uint16_t* glyph_ids, uint32_t count, |
| const MinikinPaint& paint, const FontFakery& fakery, |
| float* outAdvances) const { |
| for (uint32_t i = 0; i < count; ++i) { |
| outAdvances[i] = GetHorizontalAdvance(glyph_ids[i], paint, fakery); |
| } |
| } |
| |
| virtual void GetBounds(MinikinRect* bounds, uint32_t glyph_id, const MinikinPaint& paint, |
| const FontFakery& fakery) const = 0; |
| |
| virtual void GetFontExtent(MinikinExtent* extent, const MinikinPaint& paint, |
| const FontFakery& fakery) const = 0; |
| |
| // Returns the font path or an empty string. |
| virtual const std::string& GetFontPath() const = 0; |
| |
| // Override if font can provide access to raw data |
| virtual const void* GetFontData() const { return nullptr; } |
| |
| // Override if font can provide access to raw data |
| virtual size_t GetFontSize() const { return 0; } |
| |
| // Override if font can provide access to raw data. |
| // Returns index within OpenType collection |
| virtual int GetFontIndex() const { return 0; } |
| |
| virtual int GetSourceId() const { return 0; } |
| |
| virtual const std::vector<minikin::FontVariation>& GetAxes() const = 0; |
| |
| virtual std::shared_ptr<MinikinFont> createFontWithVariation( |
| const std::vector<FontVariation>&) const { |
| return nullptr; |
| } |
| |
| static uint32_t MakeTag(char c1, char c2, char c3, char c4) { |
| return ((uint32_t)c1 << 24) | ((uint32_t)c2 << 16) | ((uint32_t)c3 << 8) | (uint32_t)c4; |
| } |
| }; |
| |
| } // namespace minikin |
| |
| #endif // MINIKIN_MINIKIN_FONT_H |