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b80c1f19c5
All major externally accessible objects (especially FontFamily and FontCollection) are now reference counted. In addition, there is a global lock intended to make operations thread-safe. WIP notice: in this version of the patch, not all external API entry points are protected by the lock. That should be fixed. Change-Id: I14106196e99eb101e8bf1bcb4b81359759d2086c
89 lines
2.6 KiB
C++
89 lines
2.6 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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const FontFamily* getFamilyForChar(uint32_t ch) const;
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class Run {
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public:
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// Do copy constructor, assignment, destructor so it can be used in vectors
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Run() : font(NULL) { }
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Run(const Run& other): font(other.font), start(other.start), end(other.end) {
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if (font) font->RefLocked();
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}
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Run& operator=(const Run& other) {
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if (other.font) other.font->RefLocked();
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if (font) font->UnrefLocked();
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font = other.font;
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start = other.start;
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end = other.end;
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return *this;
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}
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~Run() { if (font) font->UnrefLocked(); }
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MinikinFont* font;
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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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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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// 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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