| /* |
| * 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_FAMILY_H |
| #define MINIKIN_FONT_FAMILY_H |
| |
| #include <vector> |
| #include <string> |
| #include <hb.h> |
| |
| #include <utils/TypeHelpers.h> |
| |
| #include <minikin/MinikinRefCounted.h> |
| #include <minikin/SparseBitSet.h> |
| |
| namespace android { |
| |
| class MinikinFont; |
| |
| // FontStyle represents all style information needed to select an actual font |
| // from a collection. The implementation is packed into two 32-bit words |
| // so it can be efficiently copied, embedded in other objects, etc. |
| class FontStyle { |
| public: |
| FontStyle() : FontStyle(0 /* variant */, 4 /* weight */, false /* italic */) {} |
| FontStyle(int weight, bool italic) : FontStyle(0 /* variant */, weight, italic) {} |
| FontStyle(uint32_t langListId) |
| : FontStyle(langListId, 0 /* variant */, 4 /* weight */, false /* italic */) {} |
| |
| FontStyle(int variant, int weight, bool italic); |
| FontStyle(uint32_t langListId, int variant, int weight, bool italic); |
| |
| int getWeight() const { return bits & kWeightMask; } |
| bool getItalic() const { return (bits & kItalicMask) != 0; } |
| int getVariant() const { return (bits >> kVariantShift) & kVariantMask; } |
| uint32_t getLanguageListId() const { return mLanguageListId; } |
| |
| bool operator==(const FontStyle other) const { |
| return bits == other.bits && mLanguageListId == other.mLanguageListId; |
| } |
| |
| hash_t hash() const; |
| |
| // Looks up a language list from an internal cache and returns its ID. |
| // If the passed language list is not in the cache, registers it and returns newly assigned ID. |
| static uint32_t registerLanguageList(const std::string& languages); |
| private: |
| static const uint32_t kWeightMask = (1 << 4) - 1; |
| static const uint32_t kItalicMask = 1 << 4; |
| static const int kVariantShift = 5; |
| static const uint32_t kVariantMask = (1 << 2) - 1; |
| |
| static uint32_t pack(int variant, int weight, bool italic); |
| |
| uint32_t bits; |
| uint32_t mLanguageListId; |
| }; |
| |
| enum FontVariant { |
| VARIANT_DEFAULT = 0, |
| VARIANT_COMPACT = 1, |
| VARIANT_ELEGANT = 2, |
| }; |
| |
| inline hash_t hash_type(const FontStyle &style) { |
| return style.hash(); |
| } |
| |
| // attributes representing transforms (fake bold, fake italic) to match styles |
| class FontFakery { |
| public: |
| FontFakery() : mFakeBold(false), mFakeItalic(false) { } |
| FontFakery(bool fakeBold, bool fakeItalic) : mFakeBold(fakeBold), mFakeItalic(fakeItalic) { } |
| // TODO: want to support graded fake bolding |
| bool isFakeBold() { return mFakeBold; } |
| bool isFakeItalic() { return mFakeItalic; } |
| private: |
| bool mFakeBold; |
| bool mFakeItalic; |
| }; |
| |
| struct FakedFont { |
| // ownership is the enclosing FontCollection |
| MinikinFont* font; |
| FontFakery fakery; |
| }; |
| |
| class FontFamily : public MinikinRefCounted { |
| public: |
| FontFamily(); |
| |
| FontFamily(int variant); |
| |
| FontFamily(uint32_t langId, int variant) |
| : mLangId(langId), |
| mVariant(variant), |
| mHasVSTable(false), |
| mCoverageValid(false) { |
| } |
| |
| ~FontFamily(); |
| |
| // Add font to family, extracting style information from the font |
| bool addFont(MinikinFont* typeface); |
| |
| void addFont(MinikinFont* typeface, FontStyle style); |
| FakedFont getClosestMatch(FontStyle style) const; |
| |
| uint32_t langId() const { return mLangId; } |
| int variant() const { return mVariant; } |
| |
| // API's for enumerating the fonts in a family. These don't guarantee any particular order |
| size_t getNumFonts() const; |
| MinikinFont* getFont(size_t index) const; |
| FontStyle getStyle(size_t index) const; |
| bool isColorEmojiFamily() const; |
| |
| // Get Unicode coverage. Lifetime of returned bitset is same as receiver. May return nullptr on |
| // error. |
| const SparseBitSet* getCoverage(); |
| |
| // Returns true if the font has a glyph for the code point and variation selector pair. |
| // Caller should acquire a lock before calling the method. |
| bool hasGlyph(uint32_t codepoint, uint32_t variationSelector); |
| |
| // Returns true if this font family has a variaion sequence table (cmap format 14 subtable). |
| bool hasVSTable() const; |
| |
| private: |
| void addFontLocked(MinikinFont* typeface, FontStyle style); |
| |
| class Font { |
| public: |
| Font(MinikinFont* typeface, FontStyle style) : |
| typeface(typeface), style(style) { } |
| MinikinFont* typeface; |
| FontStyle style; |
| }; |
| uint32_t mLangId; |
| int mVariant; |
| std::vector<Font> mFonts; |
| |
| SparseBitSet mCoverage; |
| bool mHasVSTable; |
| bool mCoverageValid; |
| }; |
| |
| } // namespace android |
| |
| #endif // MINIKIN_FONT_FAMILY_H |