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/*
* 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 <memory>
#include <string>
#include <unordered_set>
#include <vector>
#include "minikin/FamilyVariant.h"
#include "minikin/Font.h"
#include "minikin/FontStyle.h"
#include "minikin/HbUtils.h"
#include "minikin/Macros.h"
#include "minikin/SparseBitSet.h"
namespace minikin {
class FontFamily {
public:
explicit FontFamily(std::vector<std::shared_ptr<Font>>&& fonts);
FontFamily(FamilyVariant variant, std::vector<std::shared_ptr<Font>>&& fonts);
FontFamily(uint32_t localeListId, FamilyVariant variant,
std::vector<std::shared_ptr<Font>>&& fonts, bool isCustomFallback);
template <Font::TypefaceReader typefaceReader>
static std::shared_ptr<FontFamily> readFrom(BufferReader* reader) {
uint32_t localeListId = readLocaleListInternal(reader);
uint32_t fontsCount = reader->read<uint32_t>();
std::vector<std::shared_ptr<Font>> fonts;
fonts.reserve(fontsCount);
for (uint32_t i = 0; i < fontsCount; i++) {
fonts.emplace_back(Font::readFrom<typefaceReader>(reader, localeListId));
}
return readFromInternal(reader, std::move(fonts), localeListId);
}
template <Font::TypefaceWriter typefaceWriter>
void writeTo(BufferWriter* writer) const {
writeLocaleListInternal(writer);
writer->write<uint32_t>(mFonts.size());
for (const std::shared_ptr<Font>& font : mFonts) {
font->writeTo<typefaceWriter>(writer);
}
writeToInternal(writer);
}
FakedFont getClosestMatch(FontStyle style) const;
uint32_t localeListId() const { return mLocaleListId; }
FamilyVariant variant() const { return mVariant; }
// API's for enumerating the fonts in a family. These don't guarantee any particular order
size_t getNumFonts() const { return mFonts.size(); }
const Font* getFont(size_t index) const { return mFonts[index].get(); }
const std::shared_ptr<Font>& getFontRef(size_t index) const { return mFonts[index]; }
FontStyle getStyle(size_t index) const { return mFonts[index]->style(); }
bool isColorEmojiFamily() const { return mIsColorEmoji; }
const std::unordered_set<AxisTag>& supportedAxes() const { return mSupportedAxes; }
bool isCustomFallback() const { return mIsCustomFallback; }
// Get Unicode coverage.
const SparseBitSet& getCoverage() const { return mCoverage; }
// 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) const;
// Returns true if this font family has a variaion sequence table (cmap format 14 subtable).
bool hasVSTable() const { return !mCmapFmt14Coverage.empty(); }
// Creates new FontFamily based on this family while applying font variations. Returns nullptr
// if none of variations apply to this family.
std::shared_ptr<FontFamily> createFamilyWithVariation(
const std::vector<FontVariation>& variations) const;
private:
FontFamily(uint32_t localeListId, FamilyVariant variant,
std::vector<std::shared_ptr<Font>>&& fonts,
std::unordered_set<AxisTag>&& supportedAxes, bool isColorEmoji,
bool isCustomFallback, SparseBitSet&& coverage,
std::vector<std::unique_ptr<SparseBitSet>>&& cmapFmt14Coverage);
static uint32_t readLocaleListInternal(BufferReader* reader);
static std::shared_ptr<FontFamily> readFromInternal(BufferReader* reader,
std::vector<std::shared_ptr<Font>>&& fonts,
uint32_t localeListId);
void writeLocaleListInternal(BufferWriter* writer) const;
void writeToInternal(BufferWriter* writer) const;
void computeCoverage();
uint32_t mLocaleListId;
FamilyVariant mVariant;
std::vector<std::shared_ptr<Font>> mFonts;
std::unordered_set<AxisTag> mSupportedAxes;
bool mIsColorEmoji;
bool mIsCustomFallback;
SparseBitSet mCoverage;
std::vector<std::unique_ptr<SparseBitSet>> mCmapFmt14Coverage;
MINIKIN_PREVENT_COPY_AND_ASSIGN(FontFamily);
};
} // namespace minikin
#endif // MINIKIN_FONT_FAMILY_H
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