| /* |
| * 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_FONT_COLLECTION_H |
| #define MINIKIN_FONT_COLLECTION_H |
| |
| #include <vector> |
| |
| #include <minikin/MinikinRefCounted.h> |
| #include <minikin/MinikinFont.h> |
| #include <minikin/FontFamily.h> |
| |
| namespace minikin { |
| |
| class FontCollection : public MinikinRefCounted { |
| public: |
| explicit FontCollection(const std::vector<FontFamily*>& typefaces); |
| |
| ~FontCollection(); |
| |
| struct Run { |
| FakedFont fakedFont; |
| int start; |
| int end; |
| }; |
| |
| void itemize(const uint16_t *string, size_t string_length, FontStyle style, |
| std::vector<Run>* result) const; |
| |
| // Returns true if there is a glyph for the code point and variation selector pair. |
| // Returns false if no fonts have a glyph for the code point and variation |
| // selector pair, or invalid variation selector is passed. |
| bool hasVariationSelector(uint32_t baseCodepoint, uint32_t variationSelector) const; |
| |
| // Get the base font for the given style, useful for font-wide metrics. |
| MinikinFont* baseFont(FontStyle style); |
| |
| // Get base font with fakery information (fake bold could affect metrics) |
| FakedFont baseFontFaked(FontStyle style); |
| |
| uint32_t getId() const; |
| |
| private: |
| static const int kLogCharsPerPage = 8; |
| static const int kPageMask = (1 << kLogCharsPerPage) - 1; |
| |
| struct Range { |
| uint8_t start; |
| uint8_t end; |
| }; |
| |
| FontFamily* getFamilyForChar(uint32_t ch, uint32_t vs, uint32_t langListId, int variant) const; |
| |
| uint32_t calcFamilyScore(uint32_t ch, uint32_t vs, int variant, uint32_t langListId, |
| FontFamily* fontFamily) const; |
| |
| uint32_t calcCoverageScore(uint32_t ch, uint32_t vs, FontFamily* fontFamily) const; |
| |
| static uint32_t calcLanguageMatchingScore(uint32_t userLangListId, |
| const FontFamily& fontFamily); |
| |
| static uint32_t calcVariantMatchingScore(int variant, const FontFamily& fontFamily); |
| |
| // static for allocating unique id's |
| static uint32_t sNextId; |
| |
| // unique id for this font collection (suitable for cache key) |
| uint32_t mId; |
| |
| // Highest UTF-32 code point that can be mapped |
| uint32_t mMaxChar; |
| |
| // This vector has ownership of the bitsets and typeface objects. |
| // This vector can't be empty. |
| std::vector<FontFamily*> mFamilies; |
| |
| // This vector contains indices into mFamilies. |
| // This vector can't be empty. |
| std::vector<uint8_t> mFamilyVec; |
| |
| // This vector has pointers to the font family instance which has cmap 14 subtable. |
| std::vector<FontFamily*> mVSFamilyVec; |
| |
| // These are offsets into mFamilyVec, one range per page |
| std::vector<Range> mRanges; |
| }; |
| |
| } // namespace minikin |
| |
| #endif // MINIKIN_FONT_COLLECTION_H |