Layout.cpp revision 4d4e6bc8118d15542f1f2a9218f0f7a91a29474f
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), 664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mSize(paint.size), mIsRtl(dir) { 674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mText.setTo(chars, nchars); 684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool operator==(const LayoutCacheKey &other) const; 704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash_t hash() const; 714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // This is present to avoid having to copy the text more than once. 734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien const uint16_t* textBuf() { return mText.string(); } 744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien String16 mText; 764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t mStart; 774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t mCount; 784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien uint32_t mId; // for the font collection 794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien FontStyle mStyle; 804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float mSize; 814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool mIsRtl; 824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: any fields added to MinikinPaint must also be reflected here. 834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // TODO: language matching (possibly integrate into style) 844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutCache : private OnEntryRemoved<LayoutCacheKey, Layout*> { 874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache() : mCache(kMaxEntries) { 894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCache.setOnEntryRemovedListener(this); 904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // callback for OnEntryRemoved 934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien void operator()(LayoutCacheKey& key, Layout*& value) { 944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien delete value; 954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LruCache<LayoutCacheKey, Layout*> mCache; 984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien //static const size_t kMaxEntries = LruCache<LayoutCacheKey, Layout*>::kUnlimitedCapacity; 1004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1014d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // TODO: eviction based on memory footprint; for now, we just use a constant 1024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // number of strings 1034d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static const size_t kMaxEntries = 5000; 1044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass HbFaceCache : private OnEntryRemoved<int32_t, hb_face_t*> { 1074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1084d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache() : mCache(kMaxEntries) { 1094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCache.setOnEntryRemovedListener(this); 1104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // callback for OnEntryRemoved 1134d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien void operator()(int32_t& key, hb_face_t*& value) { 1144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_destroy(value); 1154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LruCache<int32_t, hb_face_t*> mCache; 1184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 1194d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static const size_t kMaxEntries = 100; 1204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1224d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutEngine : public Singleton<LayoutEngine> { 1234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutEngine() { 1254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hbBuffer = hb_buffer_create(); 1264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1274d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1284d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_buffer_t* hbBuffer; 1294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache layoutCache; 1304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache hbFaceCache; 1314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1324d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph LevienANDROID_SINGLETON_STATIC_INSTANCE(LayoutEngine); 1344d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1354d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienbool LayoutCacheKey::operator==(const LayoutCacheKey& other) const { 1364d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return mId == other.mId && 1374d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mStart == other.mStart && 1384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCount == other.mCount && 1394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mStyle == other.mStyle && 1404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mSize == other.mSize && 1414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mIsRtl == other.mIsRtl && 1424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mText == other.mText; 1434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 1444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienhash_t LayoutCacheKey::hash() const { 1464d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien uint32_t hash = JenkinsHashMix(0, mId); 1474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, mStart); 1484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, mCount); 1494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mStyle)); 1504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mSize)); 1514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mIsRtl)); 1524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMixShorts(hash, mText.string(), mText.size()); 1534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return JenkinsHashWhiten(hash); 1544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 1554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstruct LayoutContext { 1574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint paint; 1584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien FontStyle style; 1594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien CssProperties props; 1604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien std::vector<hb_font_t*> hbFonts; // parallel to mFaces 1614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienhash_t hash_type(const LayoutCacheKey& key) { 1644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return key.hash(); 1654d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 1664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::Bitmap(int width, int height) : width(width), height(height) { 1689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien buf = new uint8_t[width * height](); 1699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienBitmap::~Bitmap() { 1729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien delete[] buf; 1739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Bitmap::writePnm(std::ofstream &o) const { 1769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "P5" << std::endl; 1779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << width << " " << height << std::endl; 1789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o << "255" << std::endl; 1799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.write((const char *)buf, width * height); 1809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien o.close(); 1819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 183bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienvoid Bitmap::drawGlyph(const GlyphBitmap& bitmap, int x, int y) { 1849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bmw = bitmap.width; 185bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien int bmh = bitmap.height; 186bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x += bitmap.left; 187bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien y -= bitmap.top; 1889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x0 = std::max(0, x); 1899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int x1 = std::min(width, x + bmw); 1909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y0 = std::max(0, y); 1919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int y1 = std::min(height, y + bmh); 1929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const unsigned char* src = bitmap.buffer + (y0 - y) * bmw + (x0 - x); 1939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint8_t* dst = buf + y0 * width; 1949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int yy = y0; yy < y1; yy++) { 1959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (int xx = x0; xx < x1; xx++) { 1969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int pixel = (int)dst[xx] + (int)src[xx - x]; 1979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien pixel = pixel > 0xff ? 0xff : pixel; 1989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst[xx] = pixel; 1999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien src += bmw; 2019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien dst += width; 2029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 205ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid MinikinRect::join(const MinikinRect& r) { 206ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (isEmpty()) { 207ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien set(r); 208ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (!r.isEmpty()) { 209ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mLeft = std::min(mLeft, r.mLeft); 210ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mTop = std::min(mTop, r.mTop); 211ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mRight = std::max(mRight, r.mRight); 212ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBottom = std::max(mBottom, r.mBottom); 213ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 214ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 215ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 216ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien// TODO: the actual initialization is deferred, maybe make this explicit 2179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::init() { 2189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::setFontCollection(const FontCollection* collection) { 2219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection = collection; 2229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_blob_t* referenceTable(hb_face_t* face, hb_tag_t tag, void* userData) { 2254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFont* font = reinterpret_cast<MinikinFont*>(userData); 226bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t length = 0; 227bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetTable(tag, NULL, &length); 228bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 2299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien char* buffer = reinterpret_cast<char*>(malloc(length)); 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (!buffer) { 2339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 235bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = font->GetTable(tag, reinterpret_cast<uint8_t*>(buffer), &length); 236bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("referenceTable %c%c%c%c length=%d %d\n", 237bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien (tag >>24) & 0xff, (tag>>16)&0xff, (tag>>8)&0xff, tag&0xff, length, ok); 238bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 2399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien free(buffer); 2409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hb_blob_create(const_cast<char*>(buffer), length, 2439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien HB_MEMORY_MODE_WRITABLE, buffer, free); 2449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 2479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 2484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint*>(fontData); 249bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 250bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien uint32_t glyph_id; 251bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetGlyph(unicode, &glyph_id); 252bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 253bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien *glyph = glyph_id; 254bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 255bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return ok; 2569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData) 2599cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 2604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint*>(fontData); 261bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 262bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien float advance = font->GetHorizontalAdvance(glyph, *paint); 263bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return 256 * advance + 0.5; 2649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 2679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 2689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // Just return true, following the way that Harfbuzz-FreeType 2699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // implementation does. 2709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 2719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_funcs_t* getHbFontFuncs() { 2749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien static hb_font_funcs_t* hbFontFuncs = 0; 2759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hbFontFuncs == 0) { 2779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hbFontFuncs = hb_font_funcs_create(); 2789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_func(hbFontFuncs, harfbuzzGetGlyph, 0, 0); 2799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_advance_func(hbFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0); 2809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_origin_func(hbFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0); 2819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_make_immutable(hbFontFuncs); 2829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hbFontFuncs; 2849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_face_t* getHbFace(MinikinFont* minikinFont) { 2874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache& cache = LayoutEngine::getInstance().hbFaceCache; 2884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int32_t fontId = minikinFont->GetUniqueId(); 2894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_t* face = cache.mCache.get(fontId); 2904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (face == NULL) { 2914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien face = hb_face_create_for_tables(referenceTable, minikinFont, NULL); 2924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien cache.mCache.put(fontId, face); 2934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 2944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return face; 2954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 2964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_font_t* create_hb_font(MinikinFont* minikinFont, MinikinPaint* minikinPaint) { 2984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_t* face = getHbFace(minikinFont); 2999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t* font = hb_font_create(face); 300bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_funcs(font, getHbFontFuncs(), minikinPaint, 0); 3019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return font; 3029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic float HBFixedToFloat(hb_position_t v) 3059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, -8); 3079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t HBFloatToFixed(float v) 3109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, +8); 3129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::dump() const { 3159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 3169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 3179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << glyph.glyph_id << ": " << glyph.x << ", " << glyph.y << std::endl; 3189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienint Layout::findFace(MinikinFont* face, LayoutContext* ctx) { 3229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int ix; 3239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (ix = 0; ix < mFaces.size(); ix++) { 3249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mFaces[ix] == face) { 3259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 3269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.push_back(face); 3294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: ctx == NULL means we're copying from the cache, no need to create 3304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // corresponding hb_font object. 3314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (ctx != NULL) { 3324d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_font_t* font = create_hb_font(face, &ctx->paint); 3334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->hbFonts.push_back(font); 3344d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 3359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 3369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic FontStyle styleFromCss(const CssProperties &props) { 3399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int weight = 4; 3409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontWeight)) { 3419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien weight = props.value(fontWeight).getIntValue() / 100; 3429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bool italic = false; 3449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (props.hasTag(fontStyle)) { 3459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien italic = props.value(fontStyle).getIntValue() != 0; 3469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return FontStyle(weight, italic); 3489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 350ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienstatic hb_script_t codePointToScript(hb_codepoint_t codepoint) { 3514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static hb_unicode_funcs_t* u = 0; 352ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (!u) { 353ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien u = hb_icu_get_unicode_funcs(); 354ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 355ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return hb_unicode_script(u, codepoint); 356ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 357ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 3584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_codepoint_t decodeUtf16(const uint16_t* chars, size_t len, ssize_t* iter) { 359ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v = chars[(*iter)++]; 360ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdfff), lead or trail surrogate 361ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v & 0xf800) == 0xd800) { 362ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdbff), lead surrogate 363ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) < len && (v & 0xfc00) == 0xd800) { 364ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v2 = chars[(*iter)++]; 365ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v2 in (0xdc00..0xdfff), trail surrogate 366ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v2 & 0xfc00) == 0xdc00) { 367ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // (0xd800 0xdc00) in utf-16 maps to 0x10000 in ucs-32 368ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_codepoint_t delta = (0xd800 << 10) + 0xdc00 - 0x10000; 369ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return (((hb_codepoint_t)v) << 10) + v2 - delta; 370ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 371ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien (*iter) -= 2; 372ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return ~0u; 373ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 374ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien (*iter)--; 375ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return ~0u; 376ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 377ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 378ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return v; 379ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 380ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 381ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 3824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_script_t getScriptRun(const uint16_t* chars, size_t len, ssize_t* iter) { 383ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) { 384ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return HB_SCRIPT_UNKNOWN; 385ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 386ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien uint32_t cp = decodeUtf16(chars, len, iter); 387ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_script_t current_script = codePointToScript(cp); 388ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (;;) { 389ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) 390ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 391ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const ssize_t prev_iter = *iter; 392ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien cp = decodeUtf16(chars, len, iter); 393ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_script_t script = codePointToScript(cp); 394ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (script != current_script) { 395ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED || 396ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script == HB_SCRIPT_COMMON) { 397ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = script; 398ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (script == HB_SCRIPT_INHERITED || 399ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien script == HB_SCRIPT_COMMON) { 400ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien continue; 401ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 402ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien *iter = prev_iter; 403ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 404ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 405ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 406ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 407ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED) { 408ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = HB_SCRIPT_COMMON; 409ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 410ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 411ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return current_script; 412ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 413ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 4144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * For the purpose of layout, a word break is a boundary with no 4164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * kerning or complex script processing. This is necessarily a 4174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * heuristic, but should be accurate most of the time. 4184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4194d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic bool isWordBreak(int c) { 4204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (c == ' ' || (c >= 0x2000 && c <= 0x200a) || c == 0x3000) { 4214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // spaces 4224d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return true; 4234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if ((c >= 0x3400 && c <= 0x9fff)) { 4254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // CJK ideographs (and yijing hexagram symbols) 4264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return true; 4274d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4284d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: kana is not included, as sophisticated fonts may kern kana 4294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return false; 4304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4324d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * Return offset of previous word break. It is either < offset or == 0. 4344d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4354d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic size_t getPrevWordBreak(const uint16_t* chars, size_t offset) { 4364d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (offset == 0) return 0; 4374d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[offset - 1])) { 4384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return offset - 1; 4394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = offset - 1; i > 0; i--) { 4414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[i - 1])) { 4424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return i; 4434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return 0; 4464d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * Return offset of next word break. It is either > offset or == len. 4504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic size_t getNextWordBreak(const uint16_t* chars, size_t offset, size_t len) { 4524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (offset >= len) return len; 4534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[offset])) { 4544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return offset + 1; 4554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = offset + 1; i < len; i++) { 4574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[i])) { 4584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return i; 4594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return len; 4624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien// deprecated API, to avoid breaking client 4659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t nchars) { 4664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayout(buf, 0, nchars, nchars, mCssString); 4674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien// TODO: use some standard implementation 4704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levientemplate<typename T> 4714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic T mymin(const T& a, const T& b) { 4724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return a < b ? a : b; 4734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levientemplate<typename T> 4764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic T mymax(const T& a, const T& b) { 4774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return a > b ? a : b; 4784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic void clearHbFonts(LayoutContext* ctx) { 4814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < ctx->hbFonts.size(); i++) { 4824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_font_destroy(ctx->hbFonts[i]); 483ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 4844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->hbFonts.clear(); 4854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien// TODO: API should probably take context 4884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 4894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien const std::string& css) { 4904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien AutoMutex _l(gMinikinLock); 4914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutContext ctx; 4929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 4934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx.props.parse(css); 4944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx.style = styleFromCss(ctx.props); 4959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 4964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien double size = ctx.props.value(fontSize).getFloatValue(); 4974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx.paint.size = size; 4984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int bidiFlags = ctx.props.hasTag(minikinBidi) ? ctx.props.value(minikinBidi).getIntValue() : 0; 49986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool isRtl = (bidiFlags & kDirection_Mask) != 0; 50086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool doSingleRun = true; 501bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 5029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mGlyphs.clear(); 5039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.clear(); 504ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.setEmpty(); 505ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mAdvances.clear(); 5064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvances.resize(count, 0); 50786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien mAdvance = 0; 50886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!(bidiFlags == kBidi_Force_LTR || bidiFlags == kBidi_Force_RTL)) { 50986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDi* bidi = ubidi_open(); 51086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidi) { 51186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UErrorCode status = U_ZERO_ERROR; 51286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiLevel bidiReq = bidiFlags; 51386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidiFlags == kBidi_Default_LTR) { 51486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_LTR; 51586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else if (bidiFlags == kBidi_Default_RTL) { 51686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_RTL; 51786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 5184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ubidi_setPara(bidi, buf, bufSize, bidiReq, NULL, &status); 51986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (U_SUCCESS(status)) { 52086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int paraDir = ubidi_getParaLevel(bidi) & kDirection_Mask; 52186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ssize_t rc = ubidi_countRuns(bidi, &status); 5224d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (!U_SUCCESS(status) || rc < 0) { 5234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ALOGW("error counting bidi runs, status = %d", status); 52486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 52586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!U_SUCCESS(status) || rc <= 1) { 52686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien isRtl = (paraDir == kBidi_RTL); 52786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 52886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien doSingleRun = false; 52986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // iterate through runs 53086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien for (ssize_t i = 0; i < (ssize_t)rc; i++) { 53186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t startRun = -1; 53286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t lengthRun = -1; 53386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiDirection runDir = ubidi_getVisualRun(bidi, i, &startRun, &lengthRun); 53486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (startRun == -1 || lengthRun == -1) { 53586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("invalid visual run"); 5364d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // skip the invalid run 5374d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien continue; 53886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 53986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien isRtl = (runDir == UBIDI_RTL); 54086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // TODO: min/max with context 5414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutRunCached(buf, startRun, lengthRun, bufSize, isRtl, &ctx); 54286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 54386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 54486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 54586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error calling ubidi_setPara, status = %d", status); 54686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 54786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ubidi_close(bidi); 54886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 54986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error creating bidi object"); 55086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 55186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 55286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (doSingleRun) { 5534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutRunCached(buf, start, count, bufSize, isRtl, &ctx); 5544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien clearHbFonts(&ctx); 5564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 5574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 5584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayoutRunCached(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 5594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx) { 5604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (!isRtl) { 5614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // left to right 5624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordstart = start == bufSize ? start : getPrevWordBreak(buf, start + 1); 5634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordend; 5644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t iter = start; iter < start + count; iter = wordend) { 5654d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend = getNextWordBreak(buf, iter, bufSize); 5664d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordcount = mymin(start + count, wordend) - iter; 5674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutWord(buf + wordstart, iter - wordstart, wordcount, wordend - wordstart, 5684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien isRtl, ctx, iter); 5694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordstart = wordend; 5704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } else { 5724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // right to left 5734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordstart; 5744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t end = start + count; 5754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordend = end == 0 ? 0 : getNextWordBreak(buf, end - 1, bufSize); 5764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t iter = end; iter > start; iter = wordstart) { 5774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordstart = getPrevWordBreak(buf, iter); 5784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t bufStart = mymax(start, wordstart); 5794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutWord(buf + wordstart, bufStart - wordstart, iter - bufStart, 5804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend - wordstart, isRtl, ctx, bufStart); 5814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend = wordstart; 5824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 58386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 58486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien} 58586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 5864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayoutWord(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 5874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx, size_t bufStart) { 5884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache& cache = LayoutEngine::getInstance().layoutCache; 5894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCacheKey key(mCollection, ctx->paint, ctx->style, buf, start, count, bufSize, isRtl); 5904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien Layout* value = cache.mCache.get(key); 5914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (value == NULL) { 5924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value = new Layout(); 5934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value->setFontCollection(mCollection); 5944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value->mAdvances.resize(count, 0); 5954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien clearHbFonts(ctx); 5964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: we do the layout from the copy stored in the key, in case a 5974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // badly-behaved client is mutating the buffer in a separate thread. 5984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien value->doLayoutRun(key.textBuf(), start, count, bufSize, isRtl, ctx); 5994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien appendLayout(value, bufStart); 6014d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien cache.mCache.put(key, value); 6024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 6034d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 6044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 60586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienvoid Layout::doLayoutRun(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 6064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx) { 6074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_buffer_t* buffer = LayoutEngine::getInstance().hbBuffer; 60886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien vector<FontCollection::Run> items; 6094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCollection->itemize(buf + start, count, ctx->style, &items); 61086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (isRtl) { 61186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien std::reverse(items.begin(), items.end()); 61286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 61386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 61486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien float x = mAdvance; 6159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float y = 0; 6169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t run_ix = 0; run_ix < items.size(); run_ix++) { 6179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontCollection::Run &run = items[run_ix]; 6184d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = findFace(run.font, ctx); 6194d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->paint.font = mFaces[font_ix]; 6204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_font_t* hbFont = ctx->hbFonts[font_ix]; 6214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (ctx->paint.font == NULL) { 622ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // TODO: should log what went wrong 623ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien continue; 624ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 6259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 6269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << "Run " << run_ix << ", font " << font_ix << 6279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien " [" << run.start << ":" << run.end << "]" << std::endl; 6289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 6294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien double size = ctx->paint.size; 630bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_ppem(hbFont, size, size); 631bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_scale(hbFont, HBFloatToFixed(size), HBFloatToFixed(size)); 6329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 633d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // TODO: if there are multiple scripts within a font in an RTL run, 634d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // we need to reorder those runs. This is unlikely with our current 635d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // font stack, but should be done for correctness. 6360a689bb956183beebe7d59fccb226a82680f265aRaph Levien ssize_t srunend; 6370a689bb956183beebe7d59fccb226a82680f265aRaph Levien for (ssize_t srunstart = run.start; srunstart < run.end; srunstart = srunend) { 638ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien srunend = srunstart; 63986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_script_t script = getScriptRun(buf + start, run.end, &srunend); 640ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 641ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_reset(buffer); 642ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_set_script(buffer, script); 643d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien hb_buffer_set_direction(buffer, isRtl? HB_DIRECTION_RTL : HB_DIRECTION_LTR); 64486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_buffer_add_utf16(buffer, buf, bufSize, srunstart + start, srunend - srunstart); 645ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_shape(hbFont, buffer, NULL, 0); 646ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien unsigned int numGlyphs; 6474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_glyph_info_t* info = hb_buffer_get_glyph_infos(buffer, &numGlyphs); 6484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_glyph_position_t* positions = hb_buffer_get_glyph_positions(buffer, NULL); 649ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (unsigned int i = 0; i < numGlyphs; i++) { 650ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #ifdef VERBOSE 651ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph 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 << 652ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ": " << HBFixedToFloat(positions[i].x_advance) << "; " << positions[i].x_offset << ", " << positions[i].y_offset << std::endl; 653ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #endif 654ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_codepoint_t glyph_ix = info[i].codepoint; 655ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xoff = HBFixedToFloat(positions[i].x_offset); 656ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float yoff = HBFixedToFloat(positions[i].y_offset); 657ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien LayoutGlyph glyph = {font_ix, glyph_ix, x + xoff, y + yoff}; 658ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mGlyphs.push_back(glyph); 659ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xAdvance = HBFixedToFloat(positions[i].x_advance); 660ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien MinikinRect glyphBounds; 6614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->paint.font->GetBounds(&glyphBounds, glyph_ix, ctx->paint); 662ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien glyphBounds.offset(x + xoff, y + yoff); 663ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.join(glyphBounds); 664ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien size_t cluster = info[i].cluster; 665ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mAdvances[cluster] += xAdvance; 666ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien x += xAdvance; 667ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 6689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 6699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 670bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien mAdvance = x; 6719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 6729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 6734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::appendLayout(Layout* src, size_t start) { 6744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: size==1 is by far most common, should have specialized vector for this 6754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien std::vector<int> fontMap; 6764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mFaces.size(); i++) { 6774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = findFace(src->mFaces[i], NULL); 6784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien fontMap.push_back(font_ix); 6794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int x0 = mAdvance; 6814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mGlyphs.size(); i++) { 6824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutGlyph& srcGlyph = src->mGlyphs[i]; 6834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = fontMap[srcGlyph.font_ix]; 6844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien unsigned int glyph_id = srcGlyph.glyph_id; 6854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float x = x0 + srcGlyph.x; 6864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float y = srcGlyph.y; 6874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutGlyph glyph = {font_ix, glyph_id, x, y}; 6884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mGlyphs.push_back(glyph); 6894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mAdvances.size(); i++) { 6914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvances[i + start] = src->mAdvances[i]; 6924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinRect srcBounds(src->mBounds); 6944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien srcBounds.offset(x0, 0); 6954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mBounds.join(srcBounds); 6964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvance += src->mAdvance; 6974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 6984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 6994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::draw(Bitmap* surface, int x0, int y0, float size) const { 700bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien /* 701bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien TODO: redo as MinikinPaint settings 7029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mProps.hasTag(minikinHinting)) { 7039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int hintflags = mProps.value(minikinHinting).getIntValue(); 7049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 1) load_flags |= FT_LOAD_NO_HINTING; 7059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 2) load_flags |= FT_LOAD_NO_AUTOHINT; 7069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 707bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien */ 7089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 7099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 7104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFont* mf = mFaces[glyph.font_ix]; 7114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFontFreeType* face = static_cast<MinikinFontFreeType*>(mf); 712bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien GlyphBitmap glyphBitmap; 713bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 7144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien paint.size = size; 715bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = face->Render(glyph.glyph_id, paint, &glyphBitmap); 716bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("glyphBitmap.width=%d, glyphBitmap.height=%d (%d, %d) x=%f, y=%f, ok=%d\n", 717bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien glyphBitmap.width, glyphBitmap.height, glyphBitmap.left, glyphBitmap.top, glyph.x, glyph.y, ok); 718bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 719bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien surface->drawGlyph(glyphBitmap, 720bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x0 + int(floor(glyph.x + 0.5)), y0 + int(floor(glyph.y + 0.5))); 721bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 7229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 7239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 7249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 7254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::setProperties(const string& css) { 7264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCssString = css; 7279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 7289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 729ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Leviensize_t Layout::nGlyphs() const { 730ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return mGlyphs.size(); 731ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 732ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 7334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph LevienMinikinFont* Layout::getFont(int i) const { 734ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 735ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return mFaces[glyph.font_ix]; 736ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 737ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 738ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienunsigned int Layout::getGlyphId(int i) const { 739ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 740ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.glyph_id; 741ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 742ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 743ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getX(int i) const { 744ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 745ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.x; 746ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 747ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 748ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getY(int i) const { 749ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 750ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.y; 751ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 752ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 753bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienfloat Layout::getAdvance() const { 754bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return mAdvance; 755bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien} 756bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 757ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getAdvances(float* advances) { 758ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien memcpy(advances, &mAdvances[0], mAdvances.size() * sizeof(float)); 759ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 760ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 761ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getBounds(MinikinRect* bounds) { 762ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien bounds->set(mBounds); 763ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 764ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 7659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 766