Layout.cpp revision e8721b2d293ba1a0e5d92a066aa9aa15807357cc
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 2069d4fba2f2b7bb2c248cc0e78cf277a6e44665f8Dan Albert#include <math.h> 2169d4fba2f2b7bb2c248cc0e78cf277a6e44665f8Dan Albert#include <stdio.h> // for debugging 2269d4fba2f2b7bb2c248cc0e78cf277a6e44665f8Dan Albert 23d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien#include <algorithm> 249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <fstream> 259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <iostream> // for debugging 2669d4fba2f2b7bb2c248cc0e78cf277a6e44665f8Dan Albert#include <string> 2769d4fba2f2b7bb2c248cc0e78cf277a6e44665f8Dan Albert#include <vector> 289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/JenkinsHash.h> 304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/LruCache.h> 314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/Singleton.h> 324d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien#include <utils/String16.h> 334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 34d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien#include <unicode/ubidi.h> 35ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#include <hb-icu.h> 36ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 37b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien#include "MinikinInternal.h" 38bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <minikin/MinikinFontFreeType.h> 399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/Layout.h> 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::string; 429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 448920e81717c6e51b92ff8f4479a1f959af260556John Recknamespace minikin { 458920e81717c6e51b92ff8f4479a1f959af260556John Reck 468920e81717c6e51b92ff8f4479a1f959af260556John ReckBitmap::Bitmap(int width, int height) : width(width), height(height) { 478920e81717c6e51b92ff8f4479a1f959af260556John Reck buf = new uint8_t[width * height](); 488920e81717c6e51b92ff8f4479a1f959af260556John Reck} 498920e81717c6e51b92ff8f4479a1f959af260556John Reck 508920e81717c6e51b92ff8f4479a1f959af260556John ReckBitmap::~Bitmap() { 518920e81717c6e51b92ff8f4479a1f959af260556John Reck delete[] buf; 528920e81717c6e51b92ff8f4479a1f959af260556John Reck} 538920e81717c6e51b92ff8f4479a1f959af260556John Reck 548920e81717c6e51b92ff8f4479a1f959af260556John Reckvoid Bitmap::writePnm(std::ofstream &o) const { 558920e81717c6e51b92ff8f4479a1f959af260556John Reck o << "P5" << std::endl; 568920e81717c6e51b92ff8f4479a1f959af260556John Reck o << width << " " << height << std::endl; 578920e81717c6e51b92ff8f4479a1f959af260556John Reck o << "255" << std::endl; 588920e81717c6e51b92ff8f4479a1f959af260556John Reck o.write((const char *)buf, width * height); 598920e81717c6e51b92ff8f4479a1f959af260556John Reck o.close(); 608920e81717c6e51b92ff8f4479a1f959af260556John Reck} 618920e81717c6e51b92ff8f4479a1f959af260556John Reck 628920e81717c6e51b92ff8f4479a1f959af260556John Reckvoid Bitmap::drawGlyph(const android::GlyphBitmap& bitmap, int x, int y) { 638920e81717c6e51b92ff8f4479a1f959af260556John Reck int bmw = bitmap.width; 648920e81717c6e51b92ff8f4479a1f959af260556John Reck int bmh = bitmap.height; 658920e81717c6e51b92ff8f4479a1f959af260556John Reck x += bitmap.left; 668920e81717c6e51b92ff8f4479a1f959af260556John Reck y -= bitmap.top; 678920e81717c6e51b92ff8f4479a1f959af260556John Reck int x0 = std::max(0, x); 688920e81717c6e51b92ff8f4479a1f959af260556John Reck int x1 = std::min(width, x + bmw); 698920e81717c6e51b92ff8f4479a1f959af260556John Reck int y0 = std::max(0, y); 708920e81717c6e51b92ff8f4479a1f959af260556John Reck int y1 = std::min(height, y + bmh); 718920e81717c6e51b92ff8f4479a1f959af260556John Reck const unsigned char* src = bitmap.buffer + (y0 - y) * bmw + (x0 - x); 728920e81717c6e51b92ff8f4479a1f959af260556John Reck uint8_t* dst = buf + y0 * width; 738920e81717c6e51b92ff8f4479a1f959af260556John Reck for (int yy = y0; yy < y1; yy++) { 748920e81717c6e51b92ff8f4479a1f959af260556John Reck for (int xx = x0; xx < x1; xx++) { 758920e81717c6e51b92ff8f4479a1f959af260556John Reck int pixel = (int)dst[xx] + (int)src[xx - x]; 768920e81717c6e51b92ff8f4479a1f959af260556John Reck pixel = pixel > 0xff ? 0xff : pixel; 778920e81717c6e51b92ff8f4479a1f959af260556John Reck dst[xx] = pixel; 788920e81717c6e51b92ff8f4479a1f959af260556John Reck } 798920e81717c6e51b92ff8f4479a1f959af260556John Reck src += bmw; 808920e81717c6e51b92ff8f4479a1f959af260556John Reck dst += width; 818920e81717c6e51b92ff8f4479a1f959af260556John Reck } 828920e81717c6e51b92ff8f4479a1f959af260556John Reck} 838920e81717c6e51b92ff8f4479a1f959af260556John Reck 848920e81717c6e51b92ff8f4479a1f959af260556John Reck} // namespace minikin 858920e81717c6e51b92ff8f4479a1f959af260556John Reck 869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 8886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienconst int kDirection_Mask = 0x1; 8986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 90288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbodstruct LayoutContext { 91288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod MinikinPaint paint; 92288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod FontStyle style; 93288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod std::vector<hb_font_t*> hbFonts; // parallel to mFaces 94288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 95288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod void clearHbFonts() { 96288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod for (size_t i = 0; i < hbFonts.size(); i++) { 97288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod hb_font_destroy(hbFonts[i]); 98288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 99288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod hbFonts.clear(); 100288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 101288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod}; 102288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 1034d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien// Layout cache datatypes 1044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutCacheKey { 1064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCacheKey(const FontCollection* collection, const MinikinPaint& paint, FontStyle style, 1084d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien const uint16_t* chars, size_t start, size_t count, size_t nchars, bool dir) 109cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe : mChars(chars), mNchars(nchars), 110cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe mStart(start), mCount(count), mId(collection->getId()), mStyle(style), 111448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien mSize(paint.size), mScaleX(paint.scaleX), mSkewX(paint.skewX), 1128e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod mLetterSpacing(paint.letterSpacing), 113cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe mPaintFlags(paint.paintFlags), mIsRtl(dir) { 1144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool operator==(const LayoutCacheKey &other) const; 1164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash_t hash() const; 1174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 118288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod void copyText() { 119288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod uint16_t* charsCopy = new uint16_t[mNchars]; 120288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod memcpy(charsCopy, mChars, mNchars * sizeof(uint16_t)); 121288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod mChars = charsCopy; 122288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 123288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod void freeText() { 124288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod delete[] mChars; 125288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod mChars = NULL; 126288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 127288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 128288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod void doLayout(Layout* layout, LayoutContext* ctx, const FontCollection* collection) const { 129288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod layout->setFontCollection(collection); 130288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod layout->mAdvances.resize(mCount, 0); 131288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod ctx->clearHbFonts(); 132288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod layout->doLayoutRun(mChars, mStart, mCount, mNchars, mIsRtl, ctx); 133288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 134288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 1354d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 136288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod const uint16_t* mChars; 137288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod size_t mNchars; 1384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t mStart; 1394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t mCount; 1404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien uint32_t mId; // for the font collection 1414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien FontStyle mStyle; 1424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float mSize; 143448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien float mScaleX; 144448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien float mSkewX; 1458e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod float mLetterSpacing; 146893399732b64203133c22ad3c1f3535e46bf35a7Raph Levien int32_t mPaintFlags; 1474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool mIsRtl; 1484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: any fields added to MinikinPaint must also be reflected here. 1494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // TODO: language matching (possibly integrate into style) 1504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutCache : private OnEntryRemoved<LayoutCacheKey, Layout*> { 1534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache() : mCache(kMaxEntries) { 1554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCache.setOnEntryRemovedListener(this); 1564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 158288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod void clear() { 159288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod mCache.clear(); 160288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 161288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 162288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod Layout* get(LayoutCacheKey& key, LayoutContext* ctx, const FontCollection* collection) { 163288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod Layout* layout = mCache.get(key); 164288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod if (layout == NULL) { 165288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod key.copyText(); 166288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod layout = new Layout(); 167288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod key.doLayout(layout, ctx, collection); 168288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod mCache.put(key, layout); 169288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 170288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod return layout; 171288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } 172288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 173288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbodprivate: 1744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // callback for OnEntryRemoved 1754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien void operator()(LayoutCacheKey& key, Layout*& value) { 176288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod key.freeText(); 1774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien delete value; 1784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LruCache<LayoutCacheKey, Layout*> mCache; 181288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod 1824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien //static const size_t kMaxEntries = LruCache<LayoutCacheKey, Layout*>::kUnlimitedCapacity; 1834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // TODO: eviction based on memory footprint; for now, we just use a constant 1854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // number of strings 1864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static const size_t kMaxEntries = 5000; 1874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 1884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass HbFaceCache : private OnEntryRemoved<int32_t, hb_face_t*> { 1904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 1914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache() : mCache(kMaxEntries) { 1924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCache.setOnEntryRemovedListener(this); 1934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 1954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // callback for OnEntryRemoved 1964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien void operator()(int32_t& key, hb_face_t*& value) { 1974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_destroy(value); 1984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 1994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LruCache<int32_t, hb_face_t*> mCache; 2014d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienprivate: 2024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static const size_t kMaxEntries = 100; 2034d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 2044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2050bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournaderstatic unsigned int disabledDecomposeCompatibility(hb_unicode_funcs_t*, hb_codepoint_t, 2060bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader hb_codepoint_t*, void*) { 2070bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader return 0; 2080bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader} 2090bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader 2104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienclass LayoutEngine : public Singleton<LayoutEngine> { 2114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienpublic: 2124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutEngine() { 2130bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader unicodeFunctions = hb_unicode_funcs_create(hb_icu_get_unicode_funcs()); 2140bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader /* Disable the function used for compatibility decomposition */ 2150bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader hb_unicode_funcs_set_decompose_compatibility_func( 2160bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader unicodeFunctions, disabledDecomposeCompatibility, NULL, NULL); 2174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hbBuffer = hb_buffer_create(); 2180bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader hb_buffer_set_unicode_funcs(hbBuffer, unicodeFunctions); 2194d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 2204d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_buffer_t* hbBuffer; 2220bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader hb_unicode_funcs_t* unicodeFunctions; 2234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache layoutCache; 2244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache hbFaceCache; 2254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien}; 2264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2274d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph LevienANDROID_SINGLETON_STATIC_INSTANCE(LayoutEngine); 2284d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienbool LayoutCacheKey::operator==(const LayoutCacheKey& other) const { 230448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien return mId == other.mId 231448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mStart == other.mStart 232448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mCount == other.mCount 233448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mStyle == other.mStyle 234448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mSize == other.mSize 235448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mScaleX == other.mScaleX 236448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mSkewX == other.mSkewX 2378e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod && mLetterSpacing == other.mLetterSpacing 238448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mPaintFlags == other.mPaintFlags 239448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien && mIsRtl == other.mIsRtl 240288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod && mNchars == other.mNchars 241288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod && !memcmp(mChars, other.mChars, mNchars * sizeof(uint16_t)); 2424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 2434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienhash_t LayoutCacheKey::hash() const { 2454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien uint32_t hash = JenkinsHashMix(0, mId); 2464d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, mStart); 2474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, mCount); 2484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mStyle)); 2494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mSize)); 250448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hash = JenkinsHashMix(hash, hash_type(mScaleX)); 251448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hash = JenkinsHashMix(hash, hash_type(mSkewX)); 2528e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod hash = JenkinsHashMix(hash, hash_type(mLetterSpacing)); 253448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hash = JenkinsHashMix(hash, hash_type(mPaintFlags)); 2544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hash = JenkinsHashMix(hash, hash_type(mIsRtl)); 255288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod hash = JenkinsHashMixShorts(hash, mChars, mNchars); 2564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return JenkinsHashWhiten(hash); 2574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 2584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienhash_t hash_type(const LayoutCacheKey& key) { 2604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return key.hash(); 2614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 2624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 263ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid MinikinRect::join(const MinikinRect& r) { 264ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (isEmpty()) { 265ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien set(r); 266ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (!r.isEmpty()) { 267ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mLeft = std::min(mLeft, r.mLeft); 268ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mTop = std::min(mTop, r.mTop); 269ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mRight = std::max(mRight, r.mRight); 270ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBottom = std::max(mBottom, r.mBottom); 271ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 272ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 273ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 2746da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod// Deprecated. Remove when callers are removed. 2759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::init() { 2769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2786da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbodvoid Layout::reset() { 2796da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod mGlyphs.clear(); 2806da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod mFaces.clear(); 2816da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod mBounds.setEmpty(); 2826da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod mAdvances.clear(); 2836da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod mAdvance = 0; 2846da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod} 2856da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod 2864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::setFontCollection(const FontCollection* collection) { 2879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mCollection = collection; 2889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_blob_t* referenceTable(hb_face_t* face, hb_tag_t tag, void* userData) { 2914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFont* font = reinterpret_cast<MinikinFont*>(userData); 292bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t length = 0; 293bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetTable(tag, NULL, &length); 294bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 2959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 2969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien char* buffer = reinterpret_cast<char*>(malloc(length)); 2989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (!buffer) { 2999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 3009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 301bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = font->GetTable(tag, reinterpret_cast<uint8_t*>(buffer), &length); 302bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("referenceTable %c%c%c%c length=%d %d\n", 303bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien (tag >>24) & 0xff, (tag>>16)&0xff, (tag>>8)&0xff, tag&0xff, length, ok); 304bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) { 3059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien free(buffer); 3069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return 0; 3079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hb_blob_create(const_cast<char*>(buffer), length, 3099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien HB_MEMORY_MODE_WRITABLE, buffer, free); 3109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 3139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint*>(fontData); 315bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 316bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien uint32_t glyph_id; 317bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = font->GetGlyph(unicode, &glyph_id); 318bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 319bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien *glyph = glyph_id; 320bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 321bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return ok; 3229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t harfbuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData) 3259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinPaint* paint = reinterpret_cast<MinikinPaint*>(fontData); 327bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinFont* font = paint->font; 328bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien float advance = font->GetHorizontalAdvance(glyph, *paint); 329bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return 256 * advance + 0.5; 3309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph 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) 3339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // Just return true, following the way that Harfbuzz-FreeType 3359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // implementation does. 3369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 3379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3389cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienhb_font_funcs_t* getHbFontFuncs() { 3409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien static hb_font_funcs_t* hbFontFuncs = 0; 3419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hbFontFuncs == 0) { 3439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hbFontFuncs = hb_font_funcs_create(); 3449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_func(hbFontFuncs, harfbuzzGetGlyph, 0, 0); 3459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_advance_func(hbFontFuncs, harfbuzzGetGlyphHorizontalAdvance, 0, 0); 3469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_set_glyph_h_origin_func(hbFontFuncs, harfbuzzGetGlyphHorizontalOrigin, 0, 0); 3479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_funcs_make_immutable(hbFontFuncs); 3489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return hbFontFuncs; 3509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_face_t* getHbFace(MinikinFont* minikinFont) { 3534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien HbFaceCache& cache = LayoutEngine::getInstance().hbFaceCache; 3544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int32_t fontId = minikinFont->GetUniqueId(); 3554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_t* face = cache.mCache.get(fontId); 3564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (face == NULL) { 3574d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien face = hb_face_create_for_tables(referenceTable, minikinFont, NULL); 3584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien cache.mCache.put(fontId, face); 3594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 3604d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return face; 3614d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 3624d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 3634d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_font_t* create_hb_font(MinikinFont* minikinFont, MinikinPaint* minikinPaint) { 3644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_face_t* face = getHbFace(minikinFont); 3659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien hb_font_t* font = hb_font_create(face); 366bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien hb_font_set_funcs(font, getHbFontFuncs(), minikinPaint, 0); 3679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return font; 3689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic float HBFixedToFloat(hb_position_t v) 3719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, -8); 3739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic hb_position_t HBFloatToFixed(float v) 3769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien{ 3779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return scalbnf (v, +8); 3789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid Layout::dump() const { 3819cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 3829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 3839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << glyph.glyph_id << ": " << glyph.x << ", " << glyph.y << std::endl; 3849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 3869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 3879a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levienint Layout::findFace(FakedFont face, LayoutContext* ctx) { 3889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien unsigned int ix; 3899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (ix = 0; ix < mFaces.size(); ix++) { 3909a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien if (mFaces[ix].font == face.font) { 3919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 3929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 3949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFaces.push_back(face); 3954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: ctx == NULL means we're copying from the cache, no need to create 3964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // corresponding hb_font object. 3974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (ctx != NULL) { 3989a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien hb_font_t* font = create_hb_font(face.font, &ctx->paint); 3994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->hbFonts.push_back(font); 4004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return ix; 4029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 4039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 404ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienstatic hb_script_t codePointToScript(hb_codepoint_t codepoint) { 4054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien static hb_unicode_funcs_t* u = 0; 406ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (!u) { 4070bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader u = LayoutEngine::getInstance().unicodeFunctions; 408ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 409ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return hb_unicode_script(u, codepoint); 410ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 411ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 4124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_codepoint_t decodeUtf16(const uint16_t* chars, size_t len, ssize_t* iter) { 413ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v = chars[(*iter)++]; 414ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdfff), lead or trail surrogate 415ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v & 0xf800) == 0xd800) { 416ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v in (0xd800..0xdbff), lead surrogate 417ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) < len && (v & 0xfc00) == 0xd800) { 418ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const uint16_t v2 = chars[(*iter)++]; 419ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // test whether v2 in (0xdc00..0xdfff), trail surrogate 420ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if ((v2 & 0xfc00) == 0xdc00) { 421ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien // (0xd800 0xdc00) in utf-16 maps to 0x10000 in ucs-32 422ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_codepoint_t delta = (0xd800 << 10) + 0xdc00 - 0x10000; 423ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return (((hb_codepoint_t)v) << 10) + v2 - delta; 424ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 425b8208bc19c178b73175f76323381a1eeb8059807Behdad Esfahbod (*iter) -= 1; 426b8208bc19c178b73175f76323381a1eeb8059807Behdad Esfahbod return 0xFFFDu; 427ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 428b8208bc19c178b73175f76323381a1eeb8059807Behdad Esfahbod return 0xFFFDu; 429ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 430ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 431ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return v; 432ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 433ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 434ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 4354d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic hb_script_t getScriptRun(const uint16_t* chars, size_t len, ssize_t* iter) { 436ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) { 437ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return HB_SCRIPT_UNKNOWN; 438ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 439ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien uint32_t cp = decodeUtf16(chars, len, iter); 440ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_script_t current_script = codePointToScript(cp); 441ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (;;) { 442ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (size_t(*iter) == len) 443ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 444ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const ssize_t prev_iter = *iter; 445ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien cp = decodeUtf16(chars, len, iter); 446ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const hb_script_t script = codePointToScript(cp); 447ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (script != current_script) { 448ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED || 449ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script == HB_SCRIPT_COMMON) { 450ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = script; 451ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else if (script == HB_SCRIPT_INHERITED || 452ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien script == HB_SCRIPT_COMMON) { 453ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien continue; 454ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } else { 455ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien *iter = prev_iter; 456ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien break; 457ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 458ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 459ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 460ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien if (current_script == HB_SCRIPT_INHERITED) { 461ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien current_script = HB_SCRIPT_COMMON; 462ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 463ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 464ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return current_script; 465ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 466ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 4674d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * For the purpose of layout, a word break is a boundary with no 4694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * kerning or complex script processing. This is necessarily a 4704d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * heuristic, but should be accurate most of the time. 4714d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic bool isWordBreak(int c) { 4734d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (c == ' ' || (c >= 0x2000 && c <= 0x200a) || c == 0x3000) { 4744d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // spaces 4754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return true; 4764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4774d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if ((c >= 0x3400 && c <= 0x9fff)) { 4784d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // CJK ideographs (and yijing hexagram symbols) 4794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return true; 4804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4814d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // Note: kana is not included, as sophisticated fonts may kern kana 4824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return false; 4834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 4844d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 4854d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 4864d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * Return offset of previous word break. It is either < offset or == 0. 4874d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 4884d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic size_t getPrevWordBreak(const uint16_t* chars, size_t offset) { 4894d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (offset == 0) return 0; 4904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[offset - 1])) { 4914d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return offset - 1; 4924d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4934d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = offset - 1; i > 0; i--) { 4944d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[i - 1])) { 4954d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return i; 4964d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4974d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 4984d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return 0; 4994d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 5004d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 5014d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien/** 5024d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien * Return offset of next word break. It is either > offset or == len. 5034d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien */ 5044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienstatic size_t getNextWordBreak(const uint16_t* chars, size_t offset, size_t len) { 5054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (offset >= len) return len; 5064d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[offset])) { 5074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return offset + 1; 5084d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = offset + 1; i < len; i++) { 5104d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (isWordBreak(chars[i])) { 5114d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return i; 5124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5134d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 5144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return len; 5154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 5164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 517e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien/** 518e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien * Disable certain scripts (mostly those with cursive connection) from having letterspacing 519e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien * applied. See https://github.com/behdad/harfbuzz/issues/64 for more details. 520e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien */ 521e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levienstatic bool isScriptOkForLetterspacing(hb_script_t script) { 522e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien return !( 523e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_ARABIC || 524e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_NKO || 525e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_PSALTER_PAHLAVI || 526e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_MANDAIC || 527e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_MONGOLIAN || 528e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_PHAGS_PA || 529e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_DEVANAGARI || 530e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_BENGALI || 531e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_GURMUKHI || 532e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_MODI || 533e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_SHARADA || 534e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_SYLOTI_NAGRI || 535e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_TIRHUTA || 536e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien script == HB_SCRIPT_OGHAM 537e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien ); 538e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien} 539e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien 5404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayout(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 54109f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod int bidiFlags, const FontStyle &style, const MinikinPaint &paint) { 54209f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod AutoMutex _l(gMinikinLock); 54309f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod 54409f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod LayoutContext ctx; 54509f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod ctx.style = style; 54609f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod ctx.paint = paint; 54709f1901d6befcab49ed46cb77151a5d4af14a3b9Behdad Esfahbod 54886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool isRtl = (bidiFlags & kDirection_Mask) != 0; 54986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bool doSingleRun = true; 550bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 5516da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod reset(); 5524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvances.resize(count, 0); 5536da7796cbe8a17efd61a3302369e69bb222fdb4fBehdad Esfahbod 55486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!(bidiFlags == kBidi_Force_LTR || bidiFlags == kBidi_Force_RTL)) { 55586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDi* bidi = ubidi_open(); 55686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidi) { 55786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UErrorCode status = U_ZERO_ERROR; 55886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiLevel bidiReq = bidiFlags; 55986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (bidiFlags == kBidi_Default_LTR) { 56086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_LTR; 56186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else if (bidiFlags == kBidi_Default_RTL) { 56286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien bidiReq = UBIDI_DEFAULT_RTL; 56386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 5644d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ubidi_setPara(bidi, buf, bufSize, bidiReq, NULL, &status); 56586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (U_SUCCESS(status)) { 56686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int paraDir = ubidi_getParaLevel(bidi) & kDirection_Mask; 56786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ssize_t rc = ubidi_countRuns(bidi, &status); 5684d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (!U_SUCCESS(status) || rc < 0) { 5694d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ALOGW("error counting bidi runs, status = %d", status); 57086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 57186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (!U_SUCCESS(status) || rc <= 1) { 57286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien isRtl = (paraDir == kBidi_RTL); 57386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 57486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien doSingleRun = false; 57586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien // iterate through runs 57686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien for (ssize_t i = 0; i < (ssize_t)rc; i++) { 57786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t startRun = -1; 57886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien int32_t lengthRun = -1; 57986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien UBiDiDirection runDir = ubidi_getVisualRun(bidi, i, &startRun, &lengthRun); 58086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (startRun == -1 || lengthRun == -1) { 58186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("invalid visual run"); 5824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // skip the invalid run 5834d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien continue; 58486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 5853f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien int32_t endRun = std::min(startRun + lengthRun, int32_t(start + count)); 5863f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien startRun = std::max(startRun, int32_t(start)); 5873f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien lengthRun = endRun - startRun; 5883f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien if (lengthRun > 0) { 5893f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien isRtl = (runDir == UBIDI_RTL); 5903f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien doLayoutRunCached(buf, startRun, lengthRun, bufSize, isRtl, &ctx, 5913f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien start); 5923f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien } 59386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 59486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 59586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 59686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error calling ubidi_setPara, status = %d", status); 59786fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 59886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ubidi_close(bidi); 59986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } else { 60086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien ALOGE("error creating bidi object"); 60186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 60286fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 60386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (doSingleRun) { 6043f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien doLayoutRunCached(buf, start, count, bufSize, isRtl, &ctx, start); 6054d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 606288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod ctx.clearHbFonts(); 6074d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 6084d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 6094d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayoutRunCached(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 6103f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien bool isRtl, LayoutContext* ctx, size_t dstStart) { 611d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien HyphenEdit hyphen = ctx->paint.hyphenEdit; 6124d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (!isRtl) { 6134d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // left to right 6144d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordstart = start == bufSize ? start : getPrevWordBreak(buf, start + 1); 6154d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordend; 6164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t iter = start; iter < start + count; iter = wordend) { 6174d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend = getNextWordBreak(buf, iter, bufSize); 618d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien // Only apply hyphen to the last word in the string. 619d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien ctx->paint.hyphenEdit = wordend >= start + count ? hyphen : HyphenEdit(); 6203f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien size_t wordcount = std::min(start + count, wordend) - iter; 6214d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutWord(buf + wordstart, iter - wordstart, wordcount, wordend - wordstart, 6223f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien isRtl, ctx, iter - dstStart); 6234d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordstart = wordend; 6244d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } else { 6264d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien // right to left 6274d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordstart; 6284d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t end = start + count; 6294d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien size_t wordend = end == 0 ? 0 : getNextWordBreak(buf, end - 1, bufSize); 6304d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t iter = end; iter > start; iter = wordstart) { 6314d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordstart = getPrevWordBreak(buf, iter); 632d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien // Only apply hyphen to the last (leftmost) word in the string. 633d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien ctx->paint.hyphenEdit = iter == end ? hyphen : HyphenEdit(); 6343f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien size_t bufStart = std::max(start, wordstart); 6354d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien doLayoutWord(buf + wordstart, bufStart - wordstart, iter - bufStart, 6363f1ea5da2ee12b0d95c17c56928c3e553d4eeda0Raph Levien wordend - wordstart, isRtl, ctx, bufStart - dstStart); 6374d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien wordend = wordstart; 6384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 63986fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 64086fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien} 64186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 6424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::doLayoutWord(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 6434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx, size_t bufStart) { 6444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCache& cache = LayoutEngine::getInstance().layoutCache; 6454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutCacheKey key(mCollection, ctx->paint, ctx->style, buf, start, count, bufSize, isRtl); 6465986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod bool skipCache = ctx->paint.skipCache(); 647288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod if (skipCache) { 648288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod Layout layout; 649288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod key.doLayout(&layout, ctx, mCollection); 650288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod appendLayout(&layout, bufStart); 651288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod } else { 652288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod Layout* layout = cache.get(key, ctx, mCollection); 653288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod appendLayout(layout, bufStart); 6544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 6554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 6564d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 6575986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbodstatic void addFeatures(const string &str, vector<hb_feature_t>* features) { 6585986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod if (!str.size()) 6595986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod return; 66067ea671fe421d0e4642caef619ec39ec86bdcaefRaph Levien 6615986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod const char* start = str.c_str(); 6625986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod const char* end = start + str.size(); 6635986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod 6645986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod while (start < end) { 6655986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod static hb_feature_t feature; 6665986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod const char* p = strchr(start, ','); 6675986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod if (!p) 6685986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod p = end; 6695986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod /* We do not allow setting features on ranges. As such, reject any 6705986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod * setting that has non-universal range. */ 6715986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod if (hb_feature_from_string (start, p - start, &feature) 6725986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod && feature.start == 0 && feature.end == (unsigned int) -1) 6735986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod features->push_back(feature); 6745986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod start = p + 1; 6755986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod } 6764043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien} 6774043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien 67886fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levienvoid Layout::doLayoutRun(const uint16_t* buf, size_t start, size_t count, size_t bufSize, 6794d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien bool isRtl, LayoutContext* ctx) { 6804d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_buffer_t* buffer = LayoutEngine::getInstance().hbBuffer; 68186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien vector<FontCollection::Run> items; 6824d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mCollection->itemize(buf + start, count, ctx->style, &items); 68386fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien if (isRtl) { 68486fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien std::reverse(items.begin(), items.end()); 68586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien } 68686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien 6874043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien vector<hb_feature_t> features; 6888e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // Disable default-on non-required ligature features if letter-spacing 6898e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // See http://dev.w3.org/csswg/css-text-3/#letter-spacing-property 6908e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // "When the effective spacing between two characters is not zero (due to 6918e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // either justification or a non-zero value of letter-spacing), user agents 6928e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod // should not apply optional ligatures." 6938e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (fabs(ctx->paint.letterSpacing) > 0.03) 6948e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod { 6958e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod static const hb_feature_t no_liga = { HB_TAG('l', 'i', 'g', 'a'), 0, 0, ~0u }; 6968e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod static const hb_feature_t no_clig = { HB_TAG('c', 'l', 'i', 'g'), 0, 0, ~0u }; 6978e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod features.push_back(no_liga); 6988e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod features.push_back(no_clig); 6998e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 7005986f6048ae21e0ec094c1f2ca0169d0ca6ec6b5Behdad Esfahbod addFeatures(ctx->paint.fontFeatureSettings, &features); 7014043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien 7028e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod double size = ctx->paint.size; 7038e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod double scaleX = ctx->paint.scaleX; 7048e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod 70586fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien float x = mAdvance; 7069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien float y = 0; 7079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t run_ix = 0; run_ix < items.size(); run_ix++) { 7089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontCollection::Run &run = items[run_ix]; 7099a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien if (run.fakedFont.font == NULL) { 7107c382381191b2280b53c375fe83dfc6217bbdfa9Raph Levien ALOGE("no font for run starting u+%04x length %d", buf[run.start], run.end - run.start); 7117c382381191b2280b53c375fe83dfc6217bbdfa9Raph Levien continue; 7127c382381191b2280b53c375fe83dfc6217bbdfa9Raph Levien } 7139a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien int font_ix = findFace(run.fakedFont, ctx); 7149a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien ctx->paint.font = mFaces[font_ix].font; 7159a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien ctx->paint.fakery = mFaces[font_ix].fakery; 7164d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_font_t* hbFont = ctx->hbFonts[font_ix]; 7179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE 7189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien std::cout << "Run " << run_ix << ", font " << font_ix << 7199cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien " [" << run.start << ":" << run.end << "]" << std::endl; 7209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 7218e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod 722448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hb_font_set_ppem(hbFont, size * scaleX, size); 723448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien hb_font_set_scale(hbFont, HBFloatToFixed(size * scaleX), HBFloatToFixed(size)); 7249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 725d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // TODO: if there are multiple scripts within a font in an RTL run, 726d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // we need to reorder those runs. This is unlikely with our current 727d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien // font stack, but should be done for correctness. 7280a689bb956183beebe7d59fccb226a82680f265aRaph Levien ssize_t srunend; 7290a689bb956183beebe7d59fccb226a82680f265aRaph Levien for (ssize_t srunstart = run.start; srunstart < run.end; srunstart = srunend) { 730ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien srunend = srunstart; 73186fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_script_t script = getScriptRun(buf + start, run.end, &srunend); 732ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 733e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien double letterSpace = 0.0; 734e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien double letterSpaceHalfLeft = 0.0; 735e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien double letterSpaceHalfRight = 0.0; 736e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien 737e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien if (ctx->paint.letterSpacing != 0.0 && isScriptOkForLetterspacing(script)) { 738e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien letterSpace = ctx->paint.letterSpacing * size * scaleX; 739e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien if ((ctx->paint.paintFlags & LinearTextFlag) == 0) { 740e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien letterSpace = round(letterSpace); 741e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien letterSpaceHalfLeft = floor(letterSpace * 0.5); 742e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien } else { 743e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien letterSpaceHalfLeft = letterSpace * 0.5; 744e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien } 745e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien letterSpaceHalfRight = letterSpace - letterSpaceHalfLeft; 746e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien } 747e8721b2d293ba1a0e5d92a066aa9aa15807357ccRaph Levien 7480bbff3a96d3836079371cdd4398c21afad3c5234Roozbeh Pournader hb_buffer_clear_contents(buffer); 749ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_buffer_set_script(buffer, script); 750d231a4b0b1d482c7ae7717b048112e1fe5d0f5a9Raph Levien hb_buffer_set_direction(buffer, isRtl? HB_DIRECTION_RTL : HB_DIRECTION_LTR); 751a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbod FontLanguage language = ctx->style.getLanguage(); 752a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbod if (language) { 753a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbod string lang = language.getString(); 7547b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien hb_buffer_set_language(buffer, hb_language_from_string(lang.c_str(), -1)); 7557b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 75686fa46c5ebb0d2c3319e08f4fbf487d8c2abbbfcRaph Levien hb_buffer_add_utf16(buffer, buf, bufSize, srunstart + start, srunend - srunstart); 757d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien if (ctx->paint.hyphenEdit.hasHyphen() && srunend > srunstart) { 758d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien // TODO: check whether this is really the desired semantics. It could have the 759d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien // effect of assigning the hyphen width to a nonspacing mark 760d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien unsigned int lastCluster = srunend - 1; 761f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader 762f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader hb_codepoint_t hyphenChar = 0x2010; // HYPHEN 763f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader hb_codepoint_t glyph; 764f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader // Fallback to ASCII HYPHEN-MINUS if the font didn't have a glyph for HYPHEN. Note 765f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader // that we intentionally don't do anything special if the font doesn't have a 766f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader // HYPHEN-MINUS either, so a tofu could be shown, hinting towards something 767f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader // missing. 768f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader if (!hb_font_get_glyph(hbFont, hyphenChar, 0, &glyph)) { 769f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader hyphenChar = 0x002D; // HYPHEN-MINUS 770f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader } 771f997dd21968bac16966269aede235247fb08a00bRoozbeh Pournader hb_buffer_add(buffer, hyphenChar, lastCluster); 772d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien } 7734043f6f6d9c584bc61bc3d81d1680bf1b558330eRaph Levien hb_shape(hbFont, buffer, features.empty() ? NULL : &features[0], features.size()); 774ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien unsigned int numGlyphs; 7754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_glyph_info_t* info = hb_buffer_get_glyph_infos(buffer, &numGlyphs); 7764d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien hb_glyph_position_t* positions = hb_buffer_get_glyph_positions(buffer, NULL); 7778e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (numGlyphs) 7788e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod { 7796740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien mAdvances[info[0].cluster - start] += letterSpaceHalfLeft; 7806740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien x += letterSpaceHalfLeft; 7818e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 782ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien for (unsigned int i = 0; i < numGlyphs; i++) { 783ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #ifdef VERBOSE 784ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph 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 << 785ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ": " << HBFixedToFloat(positions[i].x_advance) << "; " << positions[i].x_offset << ", " << positions[i].y_offset << std::endl; 786ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien #endif 7878e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (i > 0 && info[i - 1].cluster != info[i].cluster) { 7886740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien mAdvances[info[i - 1].cluster - start] += letterSpaceHalfRight; 7896740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien mAdvances[info[i].cluster - start] += letterSpaceHalfLeft; 7906740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien x += letterSpace; 7918e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 7928e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod 793ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien hb_codepoint_t glyph_ix = info[i].codepoint; 794ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xoff = HBFixedToFloat(positions[i].x_offset); 795448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien float yoff = -HBFixedToFloat(positions[i].y_offset); 796448b0fd720d7ba902b9be224a287d08abe3ebea8Raph Levien xoff += yoff * ctx->paint.skewX; 797ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien LayoutGlyph glyph = {font_ix, glyph_ix, x + xoff, y + yoff}; 798ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mGlyphs.push_back(glyph); 799ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien float xAdvance = HBFixedToFloat(positions[i].x_advance); 8006740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien if ((ctx->paint.paintFlags & LinearTextFlag) == 0) { 8016740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien xAdvance = roundf(xAdvance); 8026740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien } 803ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien MinikinRect glyphBounds; 8044d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien ctx->paint.font->GetBounds(&glyphBounds, glyph_ix, ctx->paint); 805ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien glyphBounds.offset(x + xoff, y + yoff); 806ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien mBounds.join(glyphBounds); 807d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien if (info[i].cluster - start < count) { 808d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien mAdvances[info[i].cluster - start] += xAdvance; 809d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien } else { 810d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien ALOGE("cluster %d (start %d) out of bounds of count %d", 811d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien info[i].cluster - start, start, count); 812d692d6a9791145d41d7778cdf6b40b20c2be8cb4Raph Levien } 813ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien x += xAdvance; 814ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien } 8158e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod if (numGlyphs) 8168e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod { 8176740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien mAdvances[info[numGlyphs - 1].cluster - start] += letterSpaceHalfRight; 8186740536e3927d25bf5c2567e5f6e8c175973cbb7Raph Levien x += letterSpaceHalfRight; 8198e7a3dae37e9a22b2c054aec852615843d71caf6Behdad Esfahbod } 8209cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 8219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 822bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien mAdvance = x; 8239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 8249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 8254d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienvoid Layout::appendLayout(Layout* src, size_t start) { 82656c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod int fontMapStack[16]; 82756c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod int* fontMap; 82856c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod if (src->mFaces.size() < sizeof(fontMapStack) / sizeof(fontMapStack[0])) { 82956c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod fontMap = fontMapStack; 83056c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod } else { 83156c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod fontMap = new int[src->mFaces.size()]; 83256c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod } 8334d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mFaces.size(); i++) { 8344d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = findFace(src->mFaces[i], NULL); 83556c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod fontMap[i] = font_ix; 8364d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 8374d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int x0 = mAdvance; 8384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mGlyphs.size(); i++) { 8394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutGlyph& srcGlyph = src->mGlyphs[i]; 8404d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien int font_ix = fontMap[srcGlyph.font_ix]; 8414d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien unsigned int glyph_id = srcGlyph.glyph_id; 8424d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float x = x0 + srcGlyph.x; 8434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien float y = srcGlyph.y; 8444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien LayoutGlyph glyph = {font_ix, glyph_id, x, y}; 8454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mGlyphs.push_back(glyph); 8464d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 8474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien for (size_t i = 0; i < src->mAdvances.size(); i++) { 8484d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvances[i + start] = src->mAdvances[i]; 8494d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 8504d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinRect srcBounds(src->mBounds); 8514d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien srcBounds.offset(x0, 0); 8524d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mBounds.join(srcBounds); 8534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mAdvance += src->mAdvance; 85456c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod 85556c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod if (fontMap != fontMapStack) { 85656c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod delete[] fontMap; 85756c7fb8c0633f1b02115bb4370854016f8c84fb4Behdad Esfahbod } 8584d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 8594d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 8608920e81717c6e51b92ff8f4479a1f959af260556John Reckvoid Layout::draw(minikin::Bitmap* surface, int x0, int y0, float size) const { 861bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien /* 862bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien TODO: redo as MinikinPaint settings 8639cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (mProps.hasTag(minikinHinting)) { 8649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int hintflags = mProps.value(minikinHinting).getIntValue(); 8659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 1) load_flags |= FT_LOAD_NO_HINTING; 8669cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (hintflags & 2) load_flags |= FT_LOAD_NO_AUTOHINT; 8679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 868bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien */ 8699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mGlyphs.size(); i++) { 8709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const LayoutGlyph& glyph = mGlyphs[i]; 8719a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien MinikinFont* mf = mFaces[glyph.font_ix].font; 8724d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien MinikinFontFreeType* face = static_cast<MinikinFontFreeType*>(mf); 873bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien GlyphBitmap glyphBitmap; 874bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien MinikinPaint paint; 8754d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien paint.size = size; 876bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = face->Render(glyph.glyph_id, paint, &glyphBitmap); 877bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien printf("glyphBitmap.width=%d, glyphBitmap.height=%d (%d, %d) x=%f, y=%f, ok=%d\n", 878bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien glyphBitmap.width, glyphBitmap.height, glyphBitmap.left, glyphBitmap.top, glyph.x, glyph.y, ok); 879bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (ok) { 880bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien surface->drawGlyph(glyphBitmap, 881bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien x0 + int(floor(glyph.x + 0.5)), y0 + int(floor(glyph.y + 0.5))); 882bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien } 8839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 8849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 8859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 886ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Leviensize_t Layout::nGlyphs() const { 887ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return mGlyphs.size(); 888ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 889ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 8904d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph LevienMinikinFont* Layout::getFont(int i) const { 891ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 8929a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return mFaces[glyph.font_ix].font; 8939a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien} 8949a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien 8959a5f713add8cfb91ac2c9ed5c917309053201ab6Raph LevienFontFakery Layout::getFakery(int i) const { 8969a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 8979a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return mFaces[glyph.font_ix].fakery; 898ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 899ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 900ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienunsigned int Layout::getGlyphId(int i) const { 901ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 902ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.glyph_id; 903ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 904ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 905ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getX(int i) const { 906ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 907ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.x; 908ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 909ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 910ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienfloat Layout::getY(int i) const { 911ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien const LayoutGlyph& glyph = mGlyphs[i]; 912ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien return glyph.y; 913ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 914ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 915bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienfloat Layout::getAdvance() const { 916bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien return mAdvance; 917bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien} 918bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien 919ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getAdvances(float* advances) { 920ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien memcpy(advances, &mAdvances[0], mAdvances.size() * sizeof(float)); 921ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 922ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 923ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levienvoid Layout::getBounds(MinikinRect* bounds) { 924ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien bounds->set(mBounds); 925ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien} 926ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 92722e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levienvoid Layout::purgeCaches() { 92822e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien AutoMutex _l(gMinikinLock); 92922e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien LayoutCache& layoutCache = LayoutEngine::getInstance().layoutCache; 930288c915963b3500c7efb958ba613650e2ecdfdfaBehdad Esfahbod layoutCache.clear(); 93122e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien HbFaceCache& hbCache = LayoutEngine::getInstance().hbFaceCache; 93222e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien hbCache.mCache.clear(); 93322e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien} 93422e41754f6470ff1f4c0e0a56d01f7f555b59e21Raph Levien 9359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 936