| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| /** |
| * Utilities for making Minikin work, especially from existing objects like |
| * Paint and so on. |
| **/ |
| |
| // TODO: does this really need to be separate from MinikinSkia? |
| |
| #ifndef _ANDROID_GRAPHICS_MINIKIN_UTILS_H_ |
| #define _ANDROID_GRAPHICS_MINIKIN_UTILS_H_ |
| |
| #include <cutils/compiler.h> |
| #include <minikin/Layout.h> |
| #include "Paint.h" |
| #include "MinikinSkia.h" |
| #include "Typeface.h" |
| |
| namespace android { |
| |
| class MinikinUtils { |
| public: |
| ANDROID_API static minikin::FontStyle prepareMinikinPaint(minikin::MinikinPaint* minikinPaint, |
| const Paint* paint, const Typeface* typeface); |
| |
| ANDROID_API static minikin::Layout doLayout(const Paint* paint, int bidiFlags, |
| const Typeface* typeface, const uint16_t* buf, size_t start, size_t count, |
| size_t bufSize); |
| |
| ANDROID_API static float measureText(const Paint* paint, int bidiFlags, |
| const Typeface* typeface, const uint16_t* buf, size_t start, size_t count, |
| size_t bufSize, float *advances); |
| |
| ANDROID_API static bool hasVariationSelector(const Typeface* typeface, uint32_t codepoint, |
| uint32_t vs); |
| |
| ANDROID_API static float xOffsetForTextAlign(Paint* paint, const minikin::Layout& layout); |
| |
| ANDROID_API static float hOffsetForTextAlign(Paint* paint, const minikin::Layout& layout, |
| const SkPath& path); |
| // f is a functor of type void f(size_t start, size_t end); |
| template <typename F> |
| ANDROID_API static void forFontRun(const minikin::Layout& layout, Paint* paint, F& f) { |
| float saveSkewX = paint->getTextSkewX(); |
| bool savefakeBold = paint->isFakeBoldText(); |
| const minikin::MinikinFont* curFont = nullptr; |
| size_t start = 0; |
| size_t nGlyphs = layout.nGlyphs(); |
| for (size_t i = 0; i < nGlyphs; i++) { |
| const minikin::MinikinFont* nextFont = layout.getFont(i); |
| if (i > 0 && nextFont != curFont) { |
| MinikinFontSkia::populateSkPaint(paint, curFont, layout.getFakery(start)); |
| f(start, i); |
| paint->setTextSkewX(saveSkewX); |
| paint->setFakeBoldText(savefakeBold); |
| start = i; |
| } |
| curFont = nextFont; |
| } |
| if (nGlyphs > start) { |
| MinikinFontSkia::populateSkPaint(paint, curFont, layout.getFakery(start)); |
| f(start, nGlyphs); |
| paint->setTextSkewX(saveSkewX); |
| paint->setFakeBoldText(savefakeBold); |
| } |
| } |
| }; |
| |
| } // namespace android |
| |
| #endif // _ANDROID_GRAPHICS_MINIKIN_UTILS_H_ |