MinikinUtils.cpp revision 783f961d2fa6f916009844dafeaa08ffaf96a4d3
11a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien/* 21a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * Copyright (C) 2014 The Android Open Source Project 31a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * 41a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * Licensed under the Apache License, Version 2.0 (the "License"); 51a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * you may not use this file except in compliance with the License. 61a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * You may obtain a copy of the License at 71a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * 81a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * http://www.apache.org/licenses/LICENSE-2.0 91a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * 101a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * Unless required by applicable law or agreed to in writing, software 111a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * distributed under the License is distributed on an "AS IS" BASIS, 121a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * See the License for the specific language governing permissions and 141a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien * limitations under the License. 151a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien */ 1652eb4e01a49fe2e94555c000de38bbcbbb13401bMark Salyzyn 17dccca44ffda4836b56a21da95a046c9708ffd49csergeyv#include "MinikinUtils.h" 181a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 1952eb4e01a49fe2e94555c000de38bbcbbb13401bMark Salyzyn#include <string> 2052eb4e01a49fe2e94555c000de38bbcbbb13401bMark Salyzyn 2152eb4e01a49fe2e94555c000de38bbcbbb13401bMark Salyzyn#include <log/log.h> 2252eb4e01a49fe2e94555c000de38bbcbbb13401bMark Salyzyn 23783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka#include <minikin/MeasuredText.h> 24afbd0f1fef46ef0ddf633dfde0de724db3da1405Sergei Vasilinetc#include "Paint.h" 25dccca44ffda4836b56a21da95a046c9708ffd49csergeyv#include "SkPathMeasure.h" 26bad99183916ba2bac6659efc8a28273e344ba511sergeyv#include "Typeface.h" 271a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 281a73f732f91e97c9c66b808c245ddda36a10e987Raph Leviennamespace android { 291a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 3020866c140438a9aca3e1ad09fe646308678e9383Seigo Nonakaminikin::MinikinPaint MinikinUtils::prepareMinikinPaint(const Paint* paint, 3120866c140438a9aca3e1ad09fe646308678e9383Seigo Nonaka const Typeface* typeface) { 32bad99183916ba2bac6659efc8a28273e344ba511sergeyv const Typeface* resolvedFace = Typeface::resolveDefault(typeface); 331c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka 341c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikin::MinikinPaint minikinPaint; 351c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka /* Prepare minikin Paint */ 361c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.size = 371c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka paint->isLinearText() ? paint->getTextSize() : static_cast<int>(paint->getTextSize()); 381c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.scaleX = paint->getTextScaleX(); 391c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.skewX = paint->getTextSkewX(); 401c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.letterSpacing = paint->getLetterSpacing(); 411c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.wordSpacing = paint->getWordSpacing(); 421c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.paintFlags = MinikinFontSkia::packPaintFlags(paint); 431c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.localeListId = paint->getMinikinLocaleListId(); 44c52075ee2bcfde4cf9b091e404517a74ff7cec60Seigo Nonaka minikinPaint.familyVariant = paint->getFamilyVariant(); 45c52075ee2bcfde4cf9b091e404517a74ff7cec60Seigo Nonaka minikinPaint.fontStyle = resolvedFace->fStyle; 461c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.fontFeatureSettings = paint->getFontFeatureSettings(); 471c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikinPaint.hyphenEdit = minikin::HyphenEdit(paint->getHyphenEdit()); 481c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka return minikinPaint; 49c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien} 505ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod 517c93e868825225a270c993ac058687adde682626Seigo Nonakaminikin::Layout MinikinUtils::doLayout(const Paint* paint, minikin::Bidi bidiFlags, 521bcacfdcab0eaa0cee92bd7f5a1b5e271dd68e52John Reck const Typeface* typeface, const uint16_t* buf, size_t start, 53783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka size_t count, size_t bufSize, minikin::MeasuredText* mt, 54783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka int mtOffset) { 551c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikin::MinikinPaint minikinPaint = prepareMinikinPaint(paint, typeface); 56783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka const auto& fc = Typeface::resolveDefault(typeface)->fFontCollection; 5751218e80f70601193e43d90aaf1599a7f6d11062Seigo Nonaka minikin::Layout layout; 58783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka 59783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka if (mt == nullptr) { 60783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka layout.doLayout(buf, start, count, bufSize, bidiFlags, minikinPaint, fc); 61783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka return layout; 62783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka } 63783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka 64783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka if (mt->buildLayout(minikin::U16StringPiece(buf, bufSize), 65783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka minikin::Range(start, start + count), 66783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka minikinPaint, fc, bidiFlags, mtOffset, &layout)) { 67783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka return layout; 68783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka } 69783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka 70783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka layout.doLayout(buf, start, count, bufSize, bidiFlags, minikinPaint, fc); 71c7064146f959caec058980ced144942c8044a169Seigo Nonaka return layout; 721a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien} 731a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 747c93e868825225a270c993ac058687adde682626Seigo Nonakafloat MinikinUtils::measureText(const Paint* paint, minikin::Bidi bidiFlags, 751bcacfdcab0eaa0cee92bd7f5a1b5e271dd68e52John Reck const Typeface* typeface, const uint16_t* buf, size_t start, 761bcacfdcab0eaa0cee92bd7f5a1b5e271dd68e52John Reck size_t count, size_t bufSize, float* advances) { 771c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka minikin::MinikinPaint minikinPaint = prepareMinikinPaint(paint, typeface); 781c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka const Typeface* resolvedTypeface = Typeface::resolveDefault(typeface); 791c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka return minikin::Layout::measureText(buf, start, count, bufSize, bidiFlags, minikinPaint, 801c4ab704d14c047775b3e42f87ea4081fa204e37Seigo Nonaka resolvedTypeface->fFontCollection, advances, 81783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka nullptr /* extent */); 82a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi} 83a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi 84318ca04079bd6242cb6186d9005b9caeee22e845Seigo Nonakabool MinikinUtils::hasVariationSelector(const Typeface* typeface, uint32_t codepoint, uint32_t vs) { 85bad99183916ba2bac6659efc8a28273e344ba511sergeyv const Typeface* resolvedFace = Typeface::resolveDefault(typeface); 86bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka return resolvedFace->fFontCollection->hasVariationSelector(codepoint, vs); 87bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka} 88bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka 89ae1aa85d0c7305bb621f1f8003bd674285aa3b63Seigo Nonakafloat MinikinUtils::xOffsetForTextAlign(Paint* paint, const minikin::Layout& layout) { 90f2114d5646194100242206b267ddd6e7194b7da9Raph Levien switch (paint->getTextAlign()) { 916ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kCenter_Align: 92f2114d5646194100242206b267ddd6e7194b7da9Raph Levien return layout.getAdvance() * -0.5f; 93f2114d5646194100242206b267ddd6e7194b7da9Raph Levien break; 946ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kRight_Align: 95f2114d5646194100242206b267ddd6e7194b7da9Raph Levien return -layout.getAdvance(); 96f2114d5646194100242206b267ddd6e7194b7da9Raph Levien break; 97f2114d5646194100242206b267ddd6e7194b7da9Raph Levien default: 98f2114d5646194100242206b267ddd6e7194b7da9Raph Levien break; 99f2114d5646194100242206b267ddd6e7194b7da9Raph Levien } 100f2114d5646194100242206b267ddd6e7194b7da9Raph Levien return 0; 101f2114d5646194100242206b267ddd6e7194b7da9Raph Levien} 102f2114d5646194100242206b267ddd6e7194b7da9Raph Levien 103ae1aa85d0c7305bb621f1f8003bd674285aa3b63Seigo Nonakafloat MinikinUtils::hOffsetForTextAlign(Paint* paint, const minikin::Layout& layout, 1041bcacfdcab0eaa0cee92bd7f5a1b5e271dd68e52John Reck const SkPath& path) { 1059d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien float align = 0; 1069d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien switch (paint->getTextAlign()) { 1076ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kCenter_Align: 1089d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien align = -0.5f; 1099d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien break; 1106ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kRight_Align: 1119d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien align = -1; 1129d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien break; 1139d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien default: 1149d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien return 0; 1159d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien } 1169d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien SkPathMeasure measure(path, false); 1179d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien return align * (layout.getAdvance() - measure.getLength()); 1189d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien} 11920866c140438a9aca3e1ad09fe646308678e9383Seigo Nonaka} // namespace android 120