1 /* 2 * Copyright (C) 2013 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_COLLECTION_H 18 #define MINIKIN_FONT_COLLECTION_H 19 20 #include <vector> 21 22 #include <minikin/MinikinRefCounted.h> 23 #include <minikin/MinikinFont.h> 24 #include <minikin/FontFamily.h> 25 26 namespace android { 27 28 class FontCollection : public MinikinRefCounted { 29 public: 30 explicit FontCollection(const std::vector<FontFamily*>& typefaces); 31 32 ~FontCollection(); 33 34 struct Run { 35 FakedFont fakedFont; 36 int start; 37 int end; 38 }; 39 40 void itemize(const uint16_t *string, size_t string_length, FontStyle style, 41 std::vector<Run>* result) const; 42 43 // Returns true if there is a glyph for the code point and variation selector pair. 44 // Returns false if no fonts have a glyph for the code point and variation 45 // selector pair, or invalid variation selector is passed. 46 bool hasVariationSelector(uint32_t baseCodepoint, uint32_t variationSelector) const; 47 48 // Get the base font for the given style, useful for font-wide metrics. 49 MinikinFont* baseFont(FontStyle style); 50 51 // Get base font with fakery information (fake bold could affect metrics) 52 FakedFont baseFontFaked(FontStyle style); 53 54 uint32_t getId() const; 55 56 private: 57 static const int kLogCharsPerPage = 8; 58 static const int kPageMask = (1 << kLogCharsPerPage) - 1; 59 60 struct Range { 61 size_t start; 62 size_t end; 63 }; 64 65 FontFamily* getFamilyForChar(uint32_t ch, uint32_t vs, uint32_t langListId, int variant) const; 66 67 uint32_t calcFamilyScore(uint32_t ch, uint32_t vs, int variant, uint32_t langListId, 68 FontFamily* fontFamily) const; 69 70 uint32_t calcCoverageScore(uint32_t ch, uint32_t vs, FontFamily* fontFamily) const; 71 72 static uint32_t calcLanguageMatchingScore(uint32_t userLangListId, 73 const FontFamily& fontFamily); 74 75 static uint32_t calcVariantMatchingScore(int variant, const FontFamily& fontFamily); 76 77 // static for allocating unique id's 78 static uint32_t sNextId; 79 80 // unique id for this font collection (suitable for cache key) 81 uint32_t mId; 82 83 // Highest UTF-32 code point that can be mapped 84 uint32_t mMaxChar; 85 86 // This vector has ownership of the bitsets and typeface objects. 87 // This vector can't be empty. 88 std::vector<FontFamily*> mFamilies; 89 90 // This vector contains pointers into mInstances 91 // This vector can't be empty. 92 std::vector<FontFamily*> mFamilyVec; 93 94 // This vector has pointers to the font family instance which has cmap 14 subtable. 95 std::vector<FontFamily*> mVSFamilyVec; 96 97 // These are offsets into mInstanceVec, one range per page 98 std::vector<Range> mRanges; 99 }; 100 101 } // namespace android 102 103 #endif // MINIKIN_FONT_COLLECTION_H 104