MinikinFontFreeType.h revision bcc3dc5a2591a95a57e379e27cbad69c18e91e67
1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef MINIKIN_FONT_FREETYPE_H 18#define MINIKIN_FONT_FREETYPE_H 19 20#include <ft2build.h> 21#include FT_FREETYPE_H 22#include FT_TRUETYPE_TABLES_H 23 24#include <minikin/MinikinFont.h> 25 26// An abstraction for platform fonts, allowing Minikin to be used with 27// multiple actual implementations of fonts. 28 29namespace android { 30 31struct GlyphBitmap { 32 uint8_t *buffer; 33 int width; 34 int height; 35 int left; 36 int top; 37}; 38 39class MinikinFontFreeType : public MinikinFont { 40public: 41 explicit MinikinFontFreeType(FT_Face typeface); 42 43 ~MinikinFontFreeType(); 44 45 bool GetGlyph(uint32_t codepoint, uint32_t *glyph) const; 46 47 float GetHorizontalAdvance(uint32_t glyph_id, 48 const MinikinPaint &paint) const; 49 50 // If buf is NULL, just update size 51 bool GetTable(uint32_t tag, uint8_t *buf, size_t *size); 52 53 int32_t GetUniqueId() const; 54 55 // Not a virtual method, as the protocol to access rendered 56 // glyph bitmaps is probably different depending on the 57 // backend. 58 bool Render(uint32_t glyph_id, 59 const MinikinPaint &paint, GlyphBitmap *result); 60 61 MinikinFontFreeType* GetFreeType(); 62 63private: 64 FT_Face mTypeface; 65 int32_t mUniqueId; 66 static int32_t sIdCounter; 67}; 68 69} // namespace android 70 71#endif // MINIKIN_FONT_FREETYPE_H 72