MinikinUtils.cpp revision a3024bd7026deb777556dd75dd34a719ea1c2b39
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 */ 161a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 17e95b5850ac2e56330abf68362451e7614b3dfe16Raph Levien#define LOG_TAG "Minikin" 18e95b5850ac2e56330abf68362451e7614b3dfe16Raph Levien#include <cutils/log.h> 196bfd7e7df3a9f9ea2f9e57a3552eed7f518be711Raph Levien#include <string> 20e95b5850ac2e56330abf68362451e7614b3dfe16Raph Levien 219d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien#include "SkPathMeasure.h" 226ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod#include "Paint.h" 231a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien#include "TypefaceImpl.h" 241a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 251a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien#include "MinikinUtils.h" 261a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 271a73f732f91e97c9c66b808c245ddda36a10e987Raph Leviennamespace android { 281a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 29c94f742f7e07a3b86c8f603836c19638472b3e83Raph LevienFontStyle MinikinUtils::prepareMinikinPaint(MinikinPaint* minikinPaint, FontCollection** pFont, 30c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien const Paint* paint, TypefaceImpl* typeface) { 31c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien const TypefaceImpl* resolvedFace = TypefaceImpl_resolveDefault(typeface); 32c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien *pFont = resolvedFace->fFontCollection; 335ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod FontStyle resolved = resolvedFace->fStyle; 345ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod 355ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod /* Prepare minikin FontStyle */ 366f03023ece076d33d8b171d5398c8ed70abf3f54Derek Sollenberger FontVariant minikinVariant = (paint->getFontVariant() == VARIANT_ELEGANT) ? VARIANT_ELEGANT 375ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod : VARIANT_COMPACT; 38cfc607cf57d453f977c9c4bf09b41ac481c4bbecSeigo Nonaka const uint32_t langListId = paint->getMinikinLangListId(); 39cfc607cf57d453f977c9c4bf09b41ac481c4bbecSeigo Nonaka FontStyle minikinStyle(langListId, minikinVariant, resolved.getWeight(), resolved.getItalic()); 405ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod 415ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod /* Prepare minikin Paint */ 42c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien // Note: it would be nice to handle fractional size values (it would improve smooth zoom 43c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien // behavior), but historically size has been treated as an int. 44c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien // TODO: explore whether to enable fractional sizes, possibly when linear text flag is set. 45c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->size = (int)paint->getTextSize(); 46c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->scaleX = paint->getTextScaleX(); 47c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->skewX = paint->getTextSkewX(); 48c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->letterSpacing = paint->getLetterSpacing(); 49c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->paintFlags = MinikinFontSkia::packPaintFlags(paint); 50c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->fontFeatureSettings = paint->getFontFeatureSettings(); 51c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien minikinPaint->hyphenEdit = HyphenEdit(paint->getHyphenEdit()); 52c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien return minikinStyle; 53c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien} 545ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod 55c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levienvoid MinikinUtils::doLayout(Layout* layout, const Paint* paint, int bidiFlags, 56c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien TypefaceImpl* typeface, const uint16_t* buf, size_t start, size_t count, 57c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien size_t bufSize) { 58c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien FontCollection *font; 59c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien MinikinPaint minikinPaint; 60c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien FontStyle minikinStyle = prepareMinikinPaint(&minikinPaint, &font, paint, typeface); 61c94f742f7e07a3b86c8f603836c19638472b3e83Raph Levien layout->setFontCollection(font); 625ec789608bda858a0c6d669bb44a35a5a99abcdbBehdad Esfahbod layout->doLayout(buf, start, count, bufSize, bidiFlags, minikinStyle, minikinPaint); 631a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien} 641a73f732f91e97c9c66b808c245ddda36a10e987Raph Levien 65a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagifloat MinikinUtils::measureText(const Paint* paint, int bidiFlags, TypefaceImpl* typeface, 66a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi const uint16_t* buf, size_t start, size_t count, size_t bufSize, float *advances) { 67a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi FontCollection *font; 68a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi MinikinPaint minikinPaint; 69a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi FontStyle minikinStyle = prepareMinikinPaint(&minikinPaint, &font, paint, typeface); 70a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi return Layout::measureText(buf, start, count, bufSize, bidiFlags, minikinStyle, minikinPaint, 71a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi font, advances); 72a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi} 73a3024bd7026deb777556dd75dd34a719ea1c2b39Keisuke Kuroyanagi 74bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonakabool MinikinUtils::hasVariationSelector(TypefaceImpl* typeface, uint32_t codepoint, uint32_t vs) { 75bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka const TypefaceImpl* resolvedFace = TypefaceImpl_resolveDefault(typeface); 76bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka return resolvedFace->fFontCollection->hasVariationSelector(codepoint, vs); 77bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka} 78bb1a96647a82df5a134bf631fc9db342e7ef61deSeigo Nonaka 796ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbodfloat MinikinUtils::xOffsetForTextAlign(Paint* paint, const Layout& layout) { 80f2114d5646194100242206b267ddd6e7194b7da9Raph Levien switch (paint->getTextAlign()) { 816ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kCenter_Align: 82f2114d5646194100242206b267ddd6e7194b7da9Raph Levien return layout.getAdvance() * -0.5f; 83f2114d5646194100242206b267ddd6e7194b7da9Raph Levien break; 846ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kRight_Align: 85f2114d5646194100242206b267ddd6e7194b7da9Raph Levien return -layout.getAdvance(); 86f2114d5646194100242206b267ddd6e7194b7da9Raph Levien break; 87f2114d5646194100242206b267ddd6e7194b7da9Raph Levien default: 88f2114d5646194100242206b267ddd6e7194b7da9Raph Levien break; 89f2114d5646194100242206b267ddd6e7194b7da9Raph Levien } 90f2114d5646194100242206b267ddd6e7194b7da9Raph Levien return 0; 91f2114d5646194100242206b267ddd6e7194b7da9Raph Levien} 92f2114d5646194100242206b267ddd6e7194b7da9Raph Levien 936ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbodfloat MinikinUtils::hOffsetForTextAlign(Paint* paint, const Layout& layout, const SkPath& path) { 949d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien float align = 0; 959d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien switch (paint->getTextAlign()) { 966ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kCenter_Align: 979d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien align = -0.5f; 989d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien break; 996ba30b85ddfbe37c338ee8dde3dd33322eb38d47Behdad Esfahbod case Paint::kRight_Align: 1009d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien align = -1; 1019d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien break; 1029d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien default: 1039d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien return 0; 1049d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien } 1059d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien SkPathMeasure measure(path, false); 1069d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien return align * (layout.getAdvance() - measure.getLength()); 1079d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien} 1089d2b5e1930bfc4b1da1c865843c247c708ea1565Raph Levien 109f2114d5646194100242206b267ddd6e7194b7da9Raph Levien} 110