1 /* 2 * Copyright (C) 2014 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 /** 18 * Utilities for making Minikin work, especially from existing objects like 19 * Paint and so on. 20 **/ 21 22 // TODO: does this really need to be separate from MinikinSkia? 23 24 #ifndef _ANDROID_GRAPHICS_MINIKIN_UTILS_H_ 25 #define _ANDROID_GRAPHICS_MINIKIN_UTILS_H_ 26 27 #include <minikin/Layout.h> 28 #include "Paint.h" 29 #include "MinikinSkia.h" 30 #include "TypefaceImpl.h" 31 32 namespace android { 33 34 class MinikinUtils { 35 public: 36 static FontStyle prepareMinikinPaint(MinikinPaint* minikinPaint, FontCollection** pFont, 37 const Paint* paint, TypefaceImpl* typeface); 38 39 static void doLayout(Layout* layout, const Paint* paint, int bidiFlags, 40 TypefaceImpl* typeface, const uint16_t* buf, size_t start, size_t count, 41 size_t bufSize); 42 43 static float xOffsetForTextAlign(Paint* paint, const Layout& layout); 44 45 static float hOffsetForTextAlign(Paint* paint, const Layout& layout, const SkPath& path); 46 // f is a functor of type void f(size_t start, size_t end); 47 template <typename F> 48 static void forFontRun(const Layout& layout, Paint* paint, F& f) { 49 float saveSkewX = paint->getTextSkewX(); 50 bool savefakeBold = paint->isFakeBoldText(); 51 MinikinFont* curFont = NULL; 52 size_t start = 0; 53 size_t nGlyphs = layout.nGlyphs(); 54 for (size_t i = 0; i < nGlyphs; i++) { 55 MinikinFont* nextFont = layout.getFont(i); 56 if (i > 0 && nextFont != curFont) { 57 MinikinFontSkia::populateSkPaint(paint, curFont, layout.getFakery(start)); 58 f(start, i); 59 paint->setTextSkewX(saveSkewX); 60 paint->setFakeBoldText(savefakeBold); 61 start = i; 62 } 63 curFont = nextFont; 64 } 65 if (nGlyphs > start) { 66 MinikinFontSkia::populateSkPaint(paint, curFont, layout.getFakery(start)); 67 f(start, nGlyphs); 68 paint->setTextSkewX(saveSkewX); 69 paint->setFakeBoldText(savefakeBold); 70 } 71 } 72 }; 73 74 } // namespace android 75 76 #endif // _ANDROID_GRAPHICS_MINIKIN_UTILS_H_ 77
