MinikinUtils.h revision 854363e3d2fb2a9e41d8719f4a2f0f8b89440a46
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 * SkPaint and so on. 20 **/ 21 22 // TODO: does this really need to be separate from MinikinSkia? 23 24#ifndef ANDROID_MINIKIN_UTILS_H 25#define ANDROID_MINIKIN_UTILS_H 26 27namespace android { 28 29class MinikinUtils { 30public: 31 static void SetLayoutProperties(Layout* layout, const SkPaint* paint, int flags, 32 TypefaceImpl* face); 33 static float xOffsetForTextAlign(SkPaint* paint, const Layout& layout); 34 35 // f is a functor of type void f(SkTypeface *, size_t start, size_t end); 36 template <typename F> 37 static void forFontRun(const Layout& layout, F& f) { 38 SkTypeface* lastFace = NULL; 39 size_t start = 0; 40 size_t nGlyphs = layout.nGlyphs(); 41 for (size_t i = 0; i < nGlyphs; i++) { 42 MinikinFontSkia* mfs = static_cast<MinikinFontSkia*>(layout.getFont(i)); 43 SkTypeface* skFace = mfs->GetSkTypeface(); 44 if (i > 0 && skFace != lastFace) { 45 f(lastFace, start, i); 46 start = i; 47 } 48 lastFace = skFace; 49 } 50 if (nGlyphs > start) { 51 f(lastFace, start, nGlyphs); 52 } 53 } 54}; 55 56} // namespace android 57 58#endif // ANDROID_MINIKIN_UTILS_H 59