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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_COLLECTION_H
#define MINIKIN_FONT_COLLECTION_H
#include <vector>
#include <minikin/MinikinRefCounted.h>
#include <minikin/MinikinFont.h>
#include <minikin/SparseBitSet.h>
#include <minikin/FontFamily.h>
namespace android {
class FontCollection : public MinikinRefCounted {
public:
explicit FontCollection(const std::vector<FontFamily*>& typefaces);
~FontCollection();
class Run {
public:
// Do copy constructor, assignment, destructor so it can be used in vectors
Run() : font(NULL) { }
Run(const Run& other): font(other.font), start(other.start), end(other.end) {
if (font) font->RefLocked();
}
Run& operator=(const Run& other) {
if (other.font) other.font->RefLocked();
if (font) font->UnrefLocked();
font = other.font;
start = other.start;
end = other.end;
return *this;
}
~Run() { if (font) font->UnrefLocked(); }
MinikinFont* font;
int start;
int end;
};
void itemize(const uint16_t *string, size_t string_length, FontStyle style,
std::vector<Run>* result) const;
// Get the base font for the given style, useful for font-wide metrics.
MinikinFont* baseFont(FontStyle style);
uint32_t getId() const;
private:
static const int kLogCharsPerPage = 8;
static const int kPageMask = (1 << kLogCharsPerPage) - 1;
struct FontInstance {
SparseBitSet* mCoverage;
FontFamily* mFamily;
};
struct Range {
size_t start;
size_t end;
};
const FontInstance* getInstanceForChar(uint32_t ch, FontLanguage lang, int variant) const;
// static for allocating unique id's
static uint32_t sNextId;
// unique id for this font collection (suitable for cache key)
uint32_t mId;
// Highest UTF-32 code point that can be mapped
uint32_t mMaxChar;
// This vector has ownership of the bitsets and typeface objects.
std::vector<FontInstance> mInstances;
// This vector contains pointers into mInstances
std::vector<const FontInstance*> mInstanceVec;
// These are offsets into mInstanceVec, one range per page
std::vector<Range> mRanges;
};
} // namespace android
#endif // MINIKIN_FONT_COLLECTION_H
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