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      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 _ANDROID_GRAPHICS_MINIKIN_SKIA_H_
     18 #define _ANDROID_GRAPHICS_MINIKIN_SKIA_H_
     19 
     20 #include <cutils/compiler.h>
     21 #include <minikin/MinikinFont.h>
     22 
     23 class SkPaint;
     24 class SkTypeface;
     25 
     26 namespace android {
     27 
     28 class ANDROID_API MinikinFontSkia : public MinikinFont {
     29 public:
     30     // Note: this takes ownership of the reference (will unref on dtor)
     31     explicit MinikinFontSkia(SkTypeface *typeface, const void* fontData, size_t fontSize,
     32         int ttcIndex);
     33 
     34     ~MinikinFontSkia();
     35 
     36     float GetHorizontalAdvance(uint32_t glyph_id,
     37         const MinikinPaint &paint) const;
     38 
     39     void GetBounds(MinikinRect* bounds, uint32_t glyph_id,
     40         const MinikinPaint &paint) const;
     41 
     42     const void* GetTable(uint32_t tag, size_t* size, MinikinDestroyFunc* destroy);
     43 
     44     SkTypeface* GetSkTypeface() const;
     45 
     46     // Access to underlying raw font bytes
     47     const void* GetFontData() const;
     48     size_t GetFontSize() const;
     49     int GetFontIndex() const;
     50 
     51     static uint32_t packPaintFlags(const SkPaint* paint);
     52     static void unpackPaintFlags(SkPaint* paint, uint32_t paintFlags);
     53 
     54     // set typeface and fake bold/italic parameters
     55     static void populateSkPaint(SkPaint* paint, const MinikinFont* font, FontFakery fakery);
     56 private:
     57     SkTypeface* mTypeface;
     58 
     59     // A raw pointer to the font data - it should be owned by some other object with
     60     // lifetime at least as long as this object.
     61     const void* mFontData;
     62     size_t mFontSize;
     63     int mTtcIndex;
     64 };
     65 
     66 }  // namespace android
     67 
     68 #endif  // _ANDROID_GRAPHICS_MINIKIN_SKIA_H_
     69