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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_H
#define MINIKIN_FONT_H
// An abstraction for platform fonts, allowing Minikin to be used with
// multiple actual implementations of fonts.
namespace android {
class MinikinFont;
// Possibly move into own .h file?
struct MinikinPaint {
MinikinFont *font;
float size;
// todo: skew, stretch, hinting
};
class MinikinFontFreeType;
class MinikinFont {
public:
void Ref() { mRefcount_++; }
void Unref() { if (--mRefcount_ == 0) { delete this; } }
virtual ~MinikinFont() { };
virtual bool GetGlyph(uint32_t codepoint, uint32_t *glyph) const = 0;
virtual float GetHorizontalAdvance(uint32_t glyph_id,
const MinikinPaint &paint) const = 0;
// If buf is NULL, just update size
virtual bool GetTable(uint32_t tag, uint8_t *buf, size_t *size) = 0;
virtual int32_t GetUniqueId() const = 0;
static uint32_t MakeTag(char c1, char c2, char c3, char c4) {
return ((uint32_t)c1 << 24) | ((uint32_t)c2 << 16) |
((uint32_t)c3 << 8) | (uint32_t)c4;
}
// This is used to implement a downcast without RTTI
virtual MinikinFontFreeType* GetFreeType() {
return NULL;
}
private:
int mRefcount_;
};
} // namespace android
#endif // MINIKIN_FONT_H
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