Layout.cpp revision b8208bc19c178b73175f76323381a1eeb8059807
19cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien/* 29cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Copyright (C) 2013 The Android Open Source Project 39cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 49cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Licensed under the Apache License, Version 2.0 (the "License"); 59cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * you may not use this file except in compliance with the License. 69cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * You may obtain a copy of the License at 79cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 89cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * http://www.apache.org/licenses/LICENSE-2.0 99cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Unless required by applicable law or agreed to in writing, software 119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * distributed under the License is distributed on an "AS IS" BASIS, 129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * See the License for the specific language governing permissions and 149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * limitations under the License. 159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien */ 169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 17ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#define LOG_TAG "Minikin" 18ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#include <cutils/log.h> 19ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <string> 219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <vector> 22d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien#include <algorithm> 239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <fstream> 249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <iostream> // for debugging 25bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <stdio.h> // ditto 269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 274d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/JenkinsHash.h> 284d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/LruCache.h> 294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/Singleton.h> 304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/String16.h> 314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 32d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien#include <unicode/ubidi.h> 33ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#include <hb-icu.h> 34ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 35b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien#include "MinikinInternal.h" 36bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <minikin/MinikinFontFreeType.h> 379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/Layout.h> 389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::string; 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 4486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien// TODO: these should move into the header file, but for now we don't want 4586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien// to cause namespace collisions with TextLayout.h 4686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienenum { 4786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_LTR = 0, 4886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_RTL = 1, 4986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Default_LTR = 2, 5086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Default_RTL = 3, 5186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Force_LTR = 4, 5286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Force_RTL = 5, 5386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 5486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien kBidi_Mask = 0x7 5586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien}; 5686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 5786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienconst int kDirection_Mask = 0x1; 5886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien// Layout cache datatypes 604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutCacheKey { 624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCacheKey(const FontCollection* collection, const MinikinPaint& paint, FontStyle style, 644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien const uint16_t* chars, size_t start, size_t count, size_t nchars, bool dir) 654d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien : mStart(start), mCount(count), mId(collection->getId()), mStyle(style), 66448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien mSize(paint.size), mScaleX(paint.scaleX), mSkewX(paint.skewX), 678e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mLetterSpacing(paint.letterSpacing), 68448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien mPaintFlags(paint.paintFlags), mIsRtl(dir) { 694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mText.setTo(chars, nchars); 704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool operator==(const LayoutCacheKey &other) const; 724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash_t hash() const; 734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // This is present to avoid having to copy the text more than once. 754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien const uint16_t* textBuf() { return mText.string(); } 764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien String16 mText; 784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t mStart; 794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t mCount; 804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien uint32_t mId; // for the font collection 814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien FontStyle mStyle; 824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float mSize; 83448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien float mScaleX; 84448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien float mSkewX; 858e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod float mLetterSpacing; 86893399732b64203133c22ad3c1f3535e46bf35a7Raph Levien int32_t mPaintFlags; 874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool mIsRtl; 884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: any fields added to MinikinPaint must also be reflected here. 894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // TODO: language matching (possibly integrate into style) 904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutCache : private OnEntryRemoved<LayoutCacheKey, Layout*> { 934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache() : mCache(kMaxEntries) { 954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCache.setOnEntryRemovedListener(this); 964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // callback for OnEntryRemoved 994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien void operator()(LayoutCacheKey& key, Layout*& value) { 1004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien delete value; 1014d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1034d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LruCache<LayoutCacheKey, Layout*> mCache; 1044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 1054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien //static const size_t kMaxEntries = LruCache<LayoutCacheKey, Layout*>::kUnlimitedCapacity; 1064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // TODO: eviction based on memory footprint; for now, we just use a constant 1084d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // number of strings 1094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static const size_t kMaxEntries = 5000; 1104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass HbFaceCache : private OnEntryRemoved<int32_t, hb_face_t*> { 1134d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache() : mCache(kMaxEntries) { 1154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCache.setOnEntryRemovedListener(this); 1164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // callback for OnEntryRemoved 1194d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien void operator()(int32_t& key, hb_face_t*& value) { 1204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_destroy(value); 1214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1224d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LruCache<int32_t, hb_face_t*> mCache; 1244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 1254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static const size_t kMaxEntries = 100; 1264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1274d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1284d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutEngine : public Singleton<LayoutEngine> { 1294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutEngine() { 1314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hbBuffer = hb_buffer_create(); 1324d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1344d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_buffer_t* hbBuffer; 1354d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache layoutCache; 1364d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache hbFaceCache; 1374d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph LevienANDROID_SINGLETON_STATIC_INSTANCE(LayoutEngine); 1404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienbool LayoutCacheKey::operator==(const LayoutCacheKey& other) const { 142448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien return mId == other.mId 143448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mStart == other.mStart 144448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mCount == other.mCount 145448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mStyle == other.mStyle 146448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mSize == other.mSize 147448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mScaleX == other.mScaleX 148448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mSkewX == other.mSkewX 1498e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod && mLetterSpacing == other.mLetterSpacing 150448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mPaintFlags == other.mPaintFlags 151448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mIsRtl == other.mIsRtl 152448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mText == other.mText; 1534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 1544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienhash_t LayoutCacheKey::hash() const { 1564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien uint32_t hash = JenkinsHashMix(0, mId); 1574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, mStart); 1584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, mCount); 1594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mStyle)); 1604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mSize)); 161448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hash = JenkinsHashMix(hash, hash_type(mScaleX)); 162448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hash = JenkinsHashMix(hash, hash_type(mSkewX)); 1638e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod hash = JenkinsHashMix(hash, hash_type(mLetterSpacing)); 164448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hash = JenkinsHashMix(hash, hash_type(mPaintFlags)); 1654d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mIsRtl)); 1664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMixShorts(hash, mText.string(), mText.size()); 1674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return JenkinsHashWhiten(hash); 1684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 1694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstruct LayoutContext { 1714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint paint; 1724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien FontStyle style; 1734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien CssProperties props; 1744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien std::vector<hb_font_t*> hbFonts; // parallel to mFaces 1754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienhash_t hash_type(const LayoutCacheKey& key) { 1784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return key.hash(); 1794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 1804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::Bitmap(int width, int height) : width(width), height(height) { 1829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buf = new uint8_t[width * height](); 1839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::~Bitmap() { 1869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien delete[] buf; 1879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Bitmap::writePnm(std::ofstream &o) const { 1909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "P5" << std::endl; 1919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << width << " " << height << std::endl; 1929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "255" << std::endl; 1939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.write((const char *)buf, width * height); 1949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.close(); 1959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 197bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienvoid Bitmap::drawGlyph(const GlyphBitmap& bitmap, int x, int y) { 1989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bmw = bitmap.width; 199bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien int bmh = bitmap.height; 200bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x += bitmap.left; 201bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien y -= bitmap.top; 2029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x0 = std::max(0, x); 2039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x1 = std::min(width, x + bmw); 2049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y0 = std::max(0, y); 2059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y1 = std::min(height, y + bmh); 2069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const unsigned char* src = bitmap.buffer + (y0 - y) * bmw + (x0 - x); 2079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint8_t* dst = buf + y0 * width; 2089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int yy = y0; yy < y1; yy++) { 2099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int xx = x0; xx < x1; xx++) { 2109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int pixel = (int)dst[xx] + (int)src[xx - x]; 2119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien pixel = pixel > 0xff ? 0xff : pixel; 2129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst[xx] = pixel; 2139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien src += bmw; 2159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst += width; 2169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 219ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid MinikinRect::join(const MinikinRect& r) { 220ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (isEmpty()) { 221ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien set(r); 222ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (!r.isEmpty()) { 223ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mLeft = std::min(mLeft, r.mLeft); 224ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mTop = std::min(mTop, r.mTop); 225ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mRight = std::max(mRight, r.mRight); 226ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBottom = std::max(mBottom, r.mBottom); 227ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 228ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 229ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 230ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien// TODO: the actual initialization is deferred, maybe make this explicit 2319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::init() { 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2344d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::setFontCollection(const FontCollection* collection) { 2359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection = collection; 2369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_blob_t* referenceTable(hb_face_t* face, hb_tag_t tag, void* userData) { 2394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFont* font = reinterpret_cast<MinikinFont*>(userData); 240bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t length = 0; 241bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetTable(tag, NULL, &length); 242bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 2439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien char* buffer = reinterpret_cast<char*>(malloc(length)); 2469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (!buffer) { 2479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 249bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = font->GetTable(tag, reinterpret_cast<uint8_t*>(buffer), &length); 250bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("referenceTable %c%c%c%c length=%d %d\n", 251bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien (tag >>24) & 0xff, (tag>>16)&0xff, (tag>>8)&0xff, tag&0xff, length, ok); 252bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 2539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien free(buffer); 2549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hb_blob_create(const_cast<char*>(buffer), length, 2579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien HB_MEMORY_MODE_WRITABLE, buffer, free); 2589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_bool_t harfbuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData) 2619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 2624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint*>(fontData); 263bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 264bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien uint32_t glyph_id; 2654422f4dd941628ad289bcabc75fbd788d37415f6Behdad Esfahbod /* HarfBuzz replaces broken input codepoints with (unsigned int) -1. 2664422f4dd941628ad289bcabc75fbd788d37415f6Behdad Esfahbod * Skia expects valid Unicode. 2674422f4dd941628ad289bcabc75fbd788d37415f6Behdad Esfahbod * Replace invalid codepoints with U+FFFD REPLACEMENT CHARACTER. 2684422f4dd941628ad289bcabc75fbd788d37415f6Behdad Esfahbod */ 2694422f4dd941628ad289bcabc75fbd788d37415f6Behdad Esfahbod if (unicode > 0x10FFFF) 2704422f4dd941628ad289bcabc75fbd788d37415f6Behdad Esfahbod unicode = 0xFFFD; 271bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetGlyph(unicode, &glyph_id); 272bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 273bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien *glyph = glyph_id; 274bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 275bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return ok; 2769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData) 2799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 2804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint*>(fontData); 281bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 282bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien float advance = font->GetHorizontalAdvance(glyph, *paint); 283bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return 256 * advance + 0.5; 2849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_bool_t harfbuzzGetGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData) 2879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 2889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // Just return true, following the way that Harfbuzz-FreeType 2899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // implementation does. 2909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 2919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_funcs_t* getHbFontFuncs() { 2949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien static hb_font_funcs_t* hbFontFuncs = 0; 2959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hbFontFuncs == 0) { 2979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hbFontFuncs = hb_font_funcs_create(); 2989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_func(hbFontFuncs, harfbuzzGetGlyph, 0, 0); 2999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_advance_func(hbFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0); 3009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_origin_func(hbFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0); 3019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_make_immutable(hbFontFuncs); 3029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hbFontFuncs; 3049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_face_t* getHbFace(MinikinFont* minikinFont) { 3074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache& cache = LayoutEngine::getInstance().hbFaceCache; 3084d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int32_t fontId = minikinFont->GetUniqueId(); 3094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_t* face = cache.mCache.get(fontId); 3104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (face == NULL) { 3114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien face = hb_face_create_for_tables(referenceTable, minikinFont, NULL); 3124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien cache.mCache.put(fontId, face); 3134d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 3144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return face; 3154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 3164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 3174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_font_t* create_hb_font(MinikinFont* minikinFont, MinikinPaint* minikinPaint) { 3184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_t* face = getHbFace(minikinFont); 3199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t* font = hb_font_create(face); 320bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_funcs(font, getHbFontFuncs(), minikinPaint, 0); 3219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return font; 3229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic float HBFixedToFloat(hb_position_t v) 3259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, -8); 3279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t HBFloatToFixed(float v) 3309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, +8); 3329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::dump() const { 3359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 3369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 3379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << glyph.glyph_id << ": " << glyph.x << ", " << glyph.y << std::endl; 3389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3419a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levienint Layout::findFace(FakedFont face, LayoutContext* ctx) { 3429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int ix; 3439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (ix = 0; ix < mFaces.size(); ix++) { 3449a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien if (mFaces[ix].font == face.font) { 3459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 3469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.push_back(face); 3494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: ctx == NULL means we're copying from the cache, no need to create 3504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // corresponding hb_font object. 3514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (ctx != NULL) { 3529a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien hb_font_t* font = create_hb_font(face.font, &ctx->paint); 3534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->hbFonts.push_back(font); 3544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 3559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 3569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic FontStyle styleFromCss(const CssProperties &props) { 3599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int weight = 4; 3609cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontWeight)) { 3619cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien weight = props.value(fontWeight).getIntValue() / 100; 3629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bool italic = false; 3649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontStyle)) { 3659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien italic = props.value(fontStyle).getIntValue() != 0; 3669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3677b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien FontLanguage lang; 3687b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (props.hasTag(cssLang)) { 3697b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien string langStr = props.value(cssLang).getStringValue(); 3707b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien lang = FontLanguage(langStr.c_str(), langStr.size()); 3717b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 3727b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien int variant = 0; 3737b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (props.hasTag(minikinVariant)) { 3747b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien variant = props.value(minikinVariant).getIntValue(); 3757b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 3767b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien return FontStyle(lang, variant, weight, italic); 3779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 379ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienstatic hb_script_t codePointToScript(hb_codepoint_t codepoint) { 3804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static hb_unicode_funcs_t* u = 0; 381ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (!u) { 382ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien u = hb_icu_get_unicode_funcs(); 383ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 384ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return hb_unicode_script(u, codepoint); 385ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 386ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 3874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_codepoint_t decodeUtf16(const uint16_t* chars, size_t len, ssize_t* iter) { 388ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v = chars[(*iter)++]; 389ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdfff), lead or trail surrogate 390ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v & 0xf800) == 0xd800) { 391ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdbff), lead surrogate 392ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) < len && (v & 0xfc00) == 0xd800) { 393ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v2 = chars[(*iter)++]; 394ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v2 in (0xdc00..0xdfff), trail surrogate 395ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v2 & 0xfc00) == 0xdc00) { 396ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // (0xd800 0xdc00) in utf-16 maps to 0x10000 in ucs-32 397ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_codepoint_t delta = (0xd800 << 10) + 0xdc00 - 0x10000; 398ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return (((hb_codepoint_t)v) << 10) + v2 - delta; 399ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 400b8208bc19c178b73175f76323381a1eeb8059807Behdad Esfahbod (*iter) -= 1; 401b8208bc19c178b73175f76323381a1eeb8059807Behdad Esfahbod return 0xFFFDu; 402ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 403b8208bc19c178b73175f76323381a1eeb8059807Behdad Esfahbod return 0xFFFDu; 404ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 405ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 406ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return v; 407ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 408ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 409ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 4104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_script_t getScriptRun(const uint16_t* chars, size_t len, ssize_t* iter) { 411ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) { 412ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return HB_SCRIPT_UNKNOWN; 413ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 414ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien uint32_t cp = decodeUtf16(chars, len, iter); 415ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_script_t current_script = codePointToScript(cp); 416ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (;;) { 417ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) 418ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 419ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const ssize_t prev_iter = *iter; 420ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien cp = decodeUtf16(chars, len, iter); 421ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_script_t script = codePointToScript(cp); 422ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (script != current_script) { 423ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED || 424ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script == HB_SCRIPT_COMMON) { 425ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = script; 426ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (script == HB_SCRIPT_INHERITED || 427ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien script == HB_SCRIPT_COMMON) { 428ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien continue; 429ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 430ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien *iter = prev_iter; 431ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 432ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 433ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 434ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 435ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED) { 436ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = HB_SCRIPT_COMMON; 437ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 438ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 439ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return current_script; 440ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 441ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 4424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * For the purpose of layout, a word break is a boundary with no 4444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * kerning or complex script processing. This is necessarily a 4454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * heuristic, but should be accurate most of the time. 4464d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic bool isWordBreak(int c) { 4484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (c == ' ' || (c >= 0x2000 && c <= 0x200a) || c == 0x3000) { 4494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // spaces 4504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return true; 4514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if ((c >= 0x3400 && c <= 0x9fff)) { 4534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // CJK ideographs (and yijing hexagram symbols) 4544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return true; 4554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: kana is not included, as sophisticated fonts may kern kana 4574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return false; 4584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * Return offset of previous word break. It is either < offset or == 0. 4624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic size_t getPrevWordBreak(const uint16_t* chars, size_t offset) { 4644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (offset == 0) return 0; 4654d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[offset - 1])) { 4664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return offset - 1; 4674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = offset - 1; i > 0; i--) { 4694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[i - 1])) { 4704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return i; 4714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return 0; 4744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * Return offset of next word break. It is either > offset or == len. 4784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic size_t getNextWordBreak(const uint16_t* chars, size_t offset, size_t len) { 4804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (offset >= len) return len; 4814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[offset])) { 4824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return offset + 1; 4834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = offset + 1; i < len; i++) { 4854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[i])) { 4864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return i; 4874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return len; 4904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic void clearHbFonts(LayoutContext* ctx) { 4934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < ctx->hbFonts.size(); i++) { 4944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_font_destroy(ctx->hbFonts[i]); 495ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 4964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->hbFonts.clear(); 4974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 5007b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien const string& css) { 5014d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien AutoMutex _l(gMinikinLock); 5024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutContext ctx; 5039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 5044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx.props.parse(css); 5054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx.style = styleFromCss(ctx.props); 5069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 5073164d1a77eecf3185347a44342131f4275de824fRaph Levien ctx.paint.size = ctx.props.value(fontSize).getDoubleValue(); 508448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien ctx.paint.scaleX = ctx.props.hasTag(fontScaleX) 5093164d1a77eecf3185347a44342131f4275de824fRaph Levien ? ctx.props.value(fontScaleX).getDoubleValue() : 1; 510448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien ctx.paint.skewX = ctx.props.hasTag(fontSkewX) 5113164d1a77eecf3185347a44342131f4275de824fRaph Levien ? ctx.props.value(fontSkewX).getDoubleValue() : 0; 5128e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod ctx.paint.letterSpacing = ctx.props.hasTag(letterSpacing) 5138e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod ? ctx.props.value(letterSpacing).getDoubleValue() : 0; 514448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien ctx.paint.paintFlags = ctx.props.hasTag(paintFlags) 5153164d1a77eecf3185347a44342131f4275de824fRaph Levien ? ctx.props.value(paintFlags).getUintValue() : 0; 5164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int bidiFlags = ctx.props.hasTag(minikinBidi) ? ctx.props.value(minikinBidi).getIntValue() : 0; 51786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool isRtl = (bidiFlags & kDirection_Mask) != 0; 51886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool doSingleRun = true; 519bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 5209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.clear(); 5219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.clear(); 522ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.setEmpty(); 523ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mAdvances.clear(); 5244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvances.resize(count, 0); 52586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien mAdvance = 0; 52686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!(bidiFlags == kBidi_Force_LTR || bidiFlags == kBidi_Force_RTL)) { 52786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDi* bidi = ubidi_open(); 52886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidi) { 52986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UErrorCode status = U_ZERO_ERROR; 53086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiLevel bidiReq = bidiFlags; 53186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidiFlags == kBidi_Default_LTR) { 53286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_LTR; 53386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else if (bidiFlags == kBidi_Default_RTL) { 53486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_RTL; 53586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 5364d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ubidi_setPara(bidi, buf, bufSize, bidiReq, NULL, &status); 53786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (U_SUCCESS(status)) { 53886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int paraDir = ubidi_getParaLevel(bidi) & kDirection_Mask; 53986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ssize_t rc = ubidi_countRuns(bidi, &status); 5404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (!U_SUCCESS(status) || rc < 0) { 5414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ALOGW("error counting bidi runs, status = %d", status); 54286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 54386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!U_SUCCESS(status) || rc <= 1) { 54486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien isRtl = (paraDir == kBidi_RTL); 54586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 54686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien doSingleRun = false; 54786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // iterate through runs 54886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien for (ssize_t i = 0; i < (ssize_t)rc; i++) { 54986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t startRun = -1; 55086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t lengthRun = -1; 55186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiDirection runDir = ubidi_getVisualRun(bidi, i, &startRun, &lengthRun); 55286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (startRun == -1 || lengthRun == -1) { 55386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("invalid visual run"); 5544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // skip the invalid run 5554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien continue; 55686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 5573f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien int32_t endRun = std::min(startRun + lengthRun, int32_t(start + count)); 5583f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien startRun = std::max(startRun, int32_t(start)); 5593f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien lengthRun = endRun - startRun; 5603f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien if (lengthRun > 0) { 5613f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien isRtl = (runDir == UBIDI_RTL); 5623f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien doLayoutRunCached(buf, startRun, lengthRun, bufSize, isRtl, &ctx, 5633f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien start); 5643f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien } 56586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 56686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 56786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 56886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error calling ubidi_setPara, status = %d", status); 56986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 57086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ubidi_close(bidi); 57186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 57286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error creating bidi object"); 57386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 57486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 57586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (doSingleRun) { 5763f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien doLayoutRunCached(buf, start, count, bufSize, isRtl, &ctx, start); 5774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien clearHbFonts(&ctx); 5794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 5804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 5814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayoutRunCached(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 5823f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien bool isRtl, LayoutContext* ctx, size_t dstStart) { 5834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (!isRtl) { 5844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // left to right 5854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordstart = start == bufSize ? start : getPrevWordBreak(buf, start + 1); 5864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordend; 5874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t iter = start; iter < start + count; iter = wordend) { 5884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend = getNextWordBreak(buf, iter, bufSize); 5893f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien size_t wordcount = std::min(start + count, wordend) - iter; 5904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutWord(buf + wordstart, iter - wordstart, wordcount, wordend - wordstart, 5913f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien isRtl, ctx, iter - dstStart); 5924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordstart = wordend; 5934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } else { 5954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // right to left 5964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordstart; 5974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t end = start + count; 5984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordend = end == 0 ? 0 : getNextWordBreak(buf, end - 1, bufSize); 5994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t iter = end; iter > start; iter = wordstart) { 6004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordstart = getPrevWordBreak(buf, iter); 6013f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien size_t bufStart = std::max(start, wordstart); 6024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutWord(buf + wordstart, bufStart - wordstart, iter - bufStart, 6033f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien wordend - wordstart, isRtl, ctx, bufStart - dstStart); 6044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend = wordstart; 6054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 60686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 60786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien} 60886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 6094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayoutWord(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 6104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx, size_t bufStart) { 6114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache& cache = LayoutEngine::getInstance().layoutCache; 6124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCacheKey key(mCollection, ctx->paint, ctx->style, buf, start, count, bufSize, isRtl); 6134d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien Layout* value = cache.mCache.get(key); 6144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (value == NULL) { 6154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value = new Layout(); 6164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value->setFontCollection(mCollection); 6174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value->mAdvances.resize(count, 0); 6184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien clearHbFonts(ctx); 6194d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: we do the layout from the copy stored in the key, in case a 6204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // badly-behaved client is mutating the buffer in a separate thread. 6214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value->doLayoutRun(key.textBuf(), start, count, bufSize, isRtl, ctx); 6224d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien appendLayout(value, bufStart); 6244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien cache.mCache.put(key, value); 6254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 6264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 6274043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levienstatic void addFeatures(vector<hb_feature_t>* features) { 6284043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien // hardcoded features, to be repaced with more flexible configuration 6294043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien static hb_feature_t palt = { HB_TAG('p', 'a', 'l', 't'), 1, 0, ~0u }; 63067ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien 63167ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien // Don't enable "palt" for now, pending implementation of more of the 63267ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien // W3C Japanese layout recommendations. See: 63367ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien // http://www.w3.org/TR/2012/NOTE-jlreq-20120403/ 63467ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien#if 0 6354043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien features->push_back(palt); 63667ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien#endif 6374043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien} 6384043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien 63986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienvoid Layout::doLayoutRun(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 6404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx) { 6414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_buffer_t* buffer = LayoutEngine::getInstance().hbBuffer; 64286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien vector<FontCollection::Run> items; 6434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCollection->itemize(buf + start, count, ctx->style, &items); 64486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (isRtl) { 64586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien std::reverse(items.begin(), items.end()); 64686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 64786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 6484043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien vector<hb_feature_t> features; 6498e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // Disable default-on non-required ligature features if letter-spacing 6508e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // See http://dev.w3.org/csswg/css-text-3/#letter-spacing-property 6518e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // "When the effective spacing between two characters is not zero (due to 6528e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // either justification or a non-zero value of letter-spacing), user agents 6538e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // should not apply optional ligatures." 6548e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (fabs(ctx->paint.letterSpacing) > 0.03) 6558e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod { 6568e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod static const hb_feature_t no_liga = { HB_TAG('l', 'i', 'g', 'a'), 0, 0, ~0u }; 6578e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod static const hb_feature_t no_clig = { HB_TAG('c', 'l', 'i', 'g'), 0, 0, ~0u }; 6588e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod features.push_back(no_liga); 6598e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod features.push_back(no_clig); 6608e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 6614043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien addFeatures(&features); 6624043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien 6638e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod double size = ctx->paint.size; 6648e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod double scaleX = ctx->paint.scaleX; 6658e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod double letterSpace = ctx->paint.letterSpacing * size * scaleX; 6668e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod double letterSpaceHalf = letterSpace * .5; 6678e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod 66886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien float x = mAdvance; 6699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float y = 0; 6709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t run_ix = 0; run_ix < items.size(); run_ix++) { 6719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontCollection::Run &run = items[run_ix]; 6729a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien if (run.fakedFont.font == NULL) { 6737c382381191b2280b53c375fe83dfc6217bbdfa9Raph Levien ALOGE("no font for run starting u+%04x length %d", buf[run.start], run.end - run.start); 6747c382381191b2280b53c375fe83dfc6217bbdfa9Raph Levien continue; 6757c382381191b2280b53c375fe83dfc6217bbdfa9Raph Levien } 6769a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien int font_ix = findFace(run.fakedFont, ctx); 6779a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien ctx->paint.font = mFaces[font_ix].font; 6789a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien ctx->paint.fakery = mFaces[font_ix].fakery; 6794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_font_t* hbFont = ctx->hbFonts[font_ix]; 6809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 6819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << "Run " << run_ix << ", font " << font_ix << 6829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien " [" << run.start << ":" << run.end << "]" << std::endl; 6839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 6848e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod 685448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hb_font_set_ppem(hbFont, size * scaleX, size); 686448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hb_font_set_scale(hbFont, HBFloatToFixed(size * scaleX), HBFloatToFixed(size)); 6879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 688d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // TODO: if there are multiple scripts within a font in an RTL run, 689d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // we need to reorder those runs. This is unlikely with our current 690d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // font stack, but should be done for correctness. 6910a689bb956183beebe7d59fccb226a82680f265aRaph Levien ssize_t srunend; 6920a689bb956183beebe7d59fccb226a82680f265aRaph Levien for (ssize_t srunstart = run.start; srunstart < run.end; srunstart = srunend) { 693ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien srunend = srunstart; 69486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_script_t script = getScriptRun(buf + start, run.end, &srunend); 695ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 696ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_reset(buffer); 697ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_set_script(buffer, script); 698d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien hb_buffer_set_direction(buffer, isRtl? HB_DIRECTION_RTL : HB_DIRECTION_LTR); 6997b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (ctx->props.hasTag(cssLang)) { 7007b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien string lang = ctx->props.value(cssLang).getStringValue(); 7017b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien hb_buffer_set_language(buffer, hb_language_from_string(lang.c_str(), -1)); 7027b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 70386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_buffer_add_utf16(buffer, buf, bufSize, srunstart + start, srunend - srunstart); 7044043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien hb_shape(hbFont, buffer, features.empty() ? NULL : &features[0], features.size()); 705ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien unsigned int numGlyphs; 7064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_glyph_info_t* info = hb_buffer_get_glyph_infos(buffer, &numGlyphs); 7074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_glyph_position_t* positions = hb_buffer_get_glyph_positions(buffer, NULL); 7088e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (numGlyphs) 7098e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod { 7108e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mAdvances[info[0].cluster - start] += letterSpaceHalf; 7118e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod x += letterSpaceHalf; 7128e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 713ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (unsigned int i = 0; i < numGlyphs; i++) { 714ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #ifdef VERBOSE 715ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien std::cout << positions[i].x_advance << " " << positions[i].y_advance << " " << positions[i].x_offset << " " << positions[i].y_offset << std::endl; std::cout << "DoLayout " << info[i].codepoint << 716ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ": " << HBFixedToFloat(positions[i].x_advance) << "; " << positions[i].x_offset << ", " << positions[i].y_offset << std::endl; 717ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #endif 7188e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (i > 0 && info[i - 1].cluster != info[i].cluster) { 7198e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mAdvances[info[i - 1].cluster - start] += letterSpaceHalf; 7208e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mAdvances[info[i].cluster - start] += letterSpaceHalf; 7218e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod x += letterSpaceHalf; 7228e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 7238e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod 724ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_codepoint_t glyph_ix = info[i].codepoint; 725ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xoff = HBFixedToFloat(positions[i].x_offset); 726448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien float yoff = -HBFixedToFloat(positions[i].y_offset); 727448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien xoff += yoff * ctx->paint.skewX; 728ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien LayoutGlyph glyph = {font_ix, glyph_ix, x + xoff, y + yoff}; 729ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mGlyphs.push_back(glyph); 730ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xAdvance = HBFixedToFloat(positions[i].x_advance); 731ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien MinikinRect glyphBounds; 7324d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->paint.font->GetBounds(&glyphBounds, glyph_ix, ctx->paint); 733ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien glyphBounds.offset(x + xoff, y + yoff); 734ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.join(glyphBounds); 7358e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mAdvances[info[i].cluster - start] += xAdvance; 736ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien x += xAdvance; 737ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 7388e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (numGlyphs) 7398e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod { 7408e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mAdvances[info[numGlyphs - 1].cluster - start] += letterSpaceHalf; 7418e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod x += letterSpaceHalf; 7428e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 7439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 7449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 745bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien mAdvance = x; 7469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 7479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 7484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::appendLayout(Layout* src, size_t start) { 7494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: size==1 is by far most common, should have specialized vector for this 7504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien std::vector<int> fontMap; 7514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mFaces.size(); i++) { 7524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = findFace(src->mFaces[i], NULL); 7534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien fontMap.push_back(font_ix); 7544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 7554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int x0 = mAdvance; 7564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mGlyphs.size(); i++) { 7574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutGlyph& srcGlyph = src->mGlyphs[i]; 7584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = fontMap[srcGlyph.font_ix]; 7594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien unsigned int glyph_id = srcGlyph.glyph_id; 7604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float x = x0 + srcGlyph.x; 7614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float y = srcGlyph.y; 7624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutGlyph glyph = {font_ix, glyph_id, x, y}; 7634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mGlyphs.push_back(glyph); 7644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 7654d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mAdvances.size(); i++) { 7664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvances[i + start] = src->mAdvances[i]; 7674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 7684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinRect srcBounds(src->mBounds); 7694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien srcBounds.offset(x0, 0); 7704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mBounds.join(srcBounds); 7714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvance += src->mAdvance; 7724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 7734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 7744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::draw(Bitmap* surface, int x0, int y0, float size) const { 775bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien /* 776bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien TODO: redo as MinikinPaint settings 7779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mProps.hasTag(minikinHinting)) { 7789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int hintflags = mProps.value(minikinHinting).getIntValue(); 7799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 1) load_flags |= FT_LOAD_NO_HINTING; 7809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 2) load_flags |= FT_LOAD_NO_AUTOHINT; 7819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 782bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien */ 7839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 7849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 7859a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien MinikinFont* mf = mFaces[glyph.font_ix].font; 7864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFontFreeType* face = static_cast<MinikinFontFreeType*>(mf); 787bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien GlyphBitmap glyphBitmap; 788bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 7894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien paint.size = size; 790bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = face->Render(glyph.glyph_id, paint, &glyphBitmap); 791bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("glyphBitmap.width=%d, glyphBitmap.height=%d (%d, %d) x=%f, y=%f, ok=%d\n", 792bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien glyphBitmap.width, glyphBitmap.height, glyphBitmap.left, glyphBitmap.top, glyph.x, glyph.y, ok); 793bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 794bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien surface->drawGlyph(glyphBitmap, 795bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x0 + int(floor(glyph.x + 0.5)), y0 + int(floor(glyph.y + 0.5))); 796bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 7979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 7989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 7999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 800ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Leviensize_t Layout::nGlyphs() const { 801ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return mGlyphs.size(); 802ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 803ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 8044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph LevienMinikinFont* Layout::getFont(int i) const { 805ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 8069a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return mFaces[glyph.font_ix].font; 8079a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien} 8089a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien 8099a5f713add8cfb91ac2c9ed5c917309053201ab6Raph LevienFontFakery Layout::getFakery(int i) const { 8109a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 8119a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return mFaces[glyph.font_ix].fakery; 812ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 813ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 814ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienunsigned int Layout::getGlyphId(int i) const { 815ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 816ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.glyph_id; 817ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 818ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 819ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getX(int i) const { 820ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 821ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.x; 822ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 823ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 824ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getY(int i) const { 825ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 826ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.y; 827ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 828ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 829bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienfloat Layout::getAdvance() const { 830bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return mAdvance; 831bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien} 832bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 833ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getAdvances(float* advances) { 834ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien memcpy(advances, &mAdvances[0], mAdvances.size() * sizeof(float)); 835ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 836ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 837ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getBounds(MinikinRect* bounds) { 838ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien bounds->set(mBounds); 839ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 840ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 84122e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levienvoid Layout::purgeCaches() { 84222e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien AutoMutex _l(gMinikinLock); 84322e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien LayoutCache& layoutCache = LayoutEngine::getInstance().layoutCache; 84422e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien layoutCache.mCache.clear(); 84522e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien HbFaceCache& hbCache = LayoutEngine::getInstance().hbFaceCache; 84622e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien hbCache.mCache.clear(); 84722e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien} 84822e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien 8499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 850