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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_MINIKIN_FONT_H
#define MINIKIN_MINIKIN_FONT_H
#include <cstdint>
#include <memory>
#include <vector>
#include "minikin/FontVariation.h"
namespace minikin {
class FontFakery;
struct MinikinExtent;
struct MinikinPaint;
struct MinikinRect;
// An abstraction for platform fonts, allowing Minikin to be used with
// multiple actual implementations of fonts.
class MinikinFont {
public:
MinikinFont() {}
virtual ~MinikinFont() {}
virtual float GetHorizontalAdvance(uint32_t glyph_id, const MinikinPaint& paint,
const FontFakery& fakery) const = 0;
virtual void GetHorizontalAdvances(uint16_t* glyph_ids, uint32_t count,
const MinikinPaint& paint, const FontFakery& fakery,
float* outAdvances) const {
for (uint32_t i = 0; i < count; ++i) {
outAdvances[i] = GetHorizontalAdvance(glyph_ids[i], paint, fakery);
}
}
virtual void GetBounds(MinikinRect* bounds, uint32_t glyph_id, const MinikinPaint& paint,
const FontFakery& fakery) const = 0;
virtual void GetFontExtent(MinikinExtent* extent, const MinikinPaint& paint,
const FontFakery& fakery) const = 0;
// Returns the font path or an empty string.
virtual const std::string& GetFontPath() const = 0;
// Override if font can provide access to raw data
virtual const void* GetFontData() const { return nullptr; }
// Override if font can provide access to raw data
virtual size_t GetFontSize() const { return 0; }
// Override if font can provide access to raw data.
// Returns index within OpenType collection
virtual int GetFontIndex() const { return 0; }
virtual int GetSourceId() const { return 0; }
virtual const std::vector<minikin::FontVariation>& GetAxes() const = 0;
virtual std::shared_ptr<MinikinFont> createFontWithVariation(
const std::vector<FontVariation>&) const {
return nullptr;
}
};
} // namespace minikin
#endif // MINIKIN_MINIKIN_FONT_H
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