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9a5f713add
This patch adds support for computing when fake bold and fake italics are needed (because the styles are requested but not provided by the matching FontFamily), and providing them as part of the layout result. Part of the fix for bug 15436379 Fake bold doesn't fully work (Minikin) Change-Id: I180c034b559837943673b5c272c8e890178dff0d
89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MINIKIN_FONT_COLLECTION_H
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#define MINIKIN_FONT_COLLECTION_H
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#include <vector>
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#include <minikin/MinikinRefCounted.h>
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#include <minikin/MinikinFont.h>
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#include <minikin/SparseBitSet.h>
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#include <minikin/FontFamily.h>
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namespace android {
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class FontCollection : public MinikinRefCounted {
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public:
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explicit FontCollection(const std::vector<FontFamily*>& typefaces);
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~FontCollection();
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struct Run {
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FakedFont fakedFont;
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int start;
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int end;
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};
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void itemize(const uint16_t *string, size_t string_length, FontStyle style,
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std::vector<Run>* result) const;
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// Get the base font for the given style, useful for font-wide metrics.
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MinikinFont* baseFont(FontStyle style);
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// Get base font with fakery information (fake bold could affect metrics)
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FakedFont baseFontFaked(FontStyle style);
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uint32_t getId() const;
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private:
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static const int kLogCharsPerPage = 8;
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static const int kPageMask = (1 << kLogCharsPerPage) - 1;
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struct FontInstance {
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SparseBitSet* mCoverage;
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FontFamily* mFamily;
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};
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struct Range {
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size_t start;
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size_t end;
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};
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const FontInstance* getInstanceForChar(uint32_t ch, FontLanguage lang, int variant) const;
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// static for allocating unique id's
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static uint32_t sNextId;
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// unique id for this font collection (suitable for cache key)
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uint32_t mId;
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// Highest UTF-32 code point that can be mapped
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uint32_t mMaxChar;
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// This vector has ownership of the bitsets and typeface objects.
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std::vector<FontInstance> mInstances;
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// This vector contains pointers into mInstances
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std::vector<const FontInstance*> mInstanceVec;
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// These are offsets into mInstanceVec, one range per page
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std::vector<Range> mRanges;
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};
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} // namespace android
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#endif // MINIKIN_FONT_COLLECTION_H
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