--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/text/qtextengine.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,2706 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdebug.h"
+#include "qtextformat.h"
+#include "qtextformat_p.h"
+#include "qtextengine_p.h"
+#include "qabstracttextdocumentlayout.h"
+#include "qtextlayout.h"
+#include "qtextboundaryfinder.h"
+#include "qvarlengtharray.h"
+#include "qfont.h"
+#include "qfont_p.h"
+#include "qfontengine_p.h"
+#include "qstring.h"
+#include <private/qunicodetables_p.h>
+#include "qtextdocument_p.h"
+#include <qapplication.h>
+#include <stdlib.h>
+
+
+QT_BEGIN_NAMESPACE
+
+namespace {
+// Helper class used in QTextEngine::itemize
+// keep it out here to allow us to keep supporting various compilers.
+class Itemizer {
+public:
+ Itemizer(const QString &string, const QScriptAnalysis *analysis, QScriptItemArray &items)
+ : m_string(string),
+ m_analysis(analysis),
+ m_items(items),
+ m_splitter(0)
+ {
+ }
+ ~Itemizer()
+ {
+ delete m_splitter;
+ }
+
+ /// generate the script items
+ /// The caps parameter is used to choose the algoritm of splitting text and assiging roles to the textitems
+ void generate(int start, int length, QFont::Capitalization caps)
+ {
+ if ((int)caps == (int)QFont::SmallCaps)
+ generateScriptItemsSmallCaps(m_string.utf16(), start, length);
+ else if(caps == QFont::Capitalize)
+ generateScriptItemsCapitalize(start, length);
+ else if(caps != QFont::MixedCase) {
+ generateScriptItemsAndChangeCase(start, length,
+ caps == QFont::AllLowercase ? QScriptAnalysis::Lowercase : QScriptAnalysis::Uppercase);
+ }
+ else
+ generateScriptItems(start, length);
+ }
+
+private:
+ enum { MaxItemLength = 4096 };
+
+ void generateScriptItemsAndChangeCase(int start, int length, QScriptAnalysis::Flags flags)
+ {
+ generateScriptItems(start, length);
+ if (m_items.isEmpty()) // the next loop won't work in that case
+ return;
+ QScriptItemArray::Iterator iter = m_items.end();
+ do {
+ iter--;
+ if (iter->analysis.flags < QScriptAnalysis::TabOrObject)
+ iter->analysis.flags = flags;
+ } while (iter->position > start);
+ }
+
+ void generateScriptItems(int start, int length)
+ {
+ if (!length)
+ return;
+ const int end = start + length;
+ for (int i = start + 1; i < end; ++i) {
+ if ((m_analysis[i] == m_analysis[start])
+ && m_analysis[i].flags < QScriptAnalysis::SpaceTabOrObject
+ && i - start < MaxItemLength)
+ continue;
+ m_items.append(QScriptItem(start, m_analysis[start]));
+ start = i;
+ }
+ m_items.append(QScriptItem(start, m_analysis[start]));
+ }
+
+ void generateScriptItemsCapitalize(int start, int length)
+ {
+ if (!length)
+ return;
+
+ if (!m_splitter)
+ m_splitter = new QTextBoundaryFinder(QTextBoundaryFinder::Word,
+ m_string.constData(), m_string.length(),
+ /*buffer*/0, /*buffer size*/0);
+
+ m_splitter->setPosition(start);
+ QScriptAnalysis itemAnalysis = m_analysis[start];
+
+ if (m_splitter->boundaryReasons() & QTextBoundaryFinder::StartWord) {
+ itemAnalysis.flags = QScriptAnalysis::Uppercase;
+ m_splitter->toNextBoundary();
+ }
+
+ const int end = start + length;
+ for (int i = start + 1; i < end; ++i) {
+
+ bool atWordBoundary = false;
+
+ if (i == m_splitter->position()) {
+ if (m_splitter->boundaryReasons() & QTextBoundaryFinder::StartWord
+ && m_analysis[i].flags < QScriptAnalysis::TabOrObject)
+ atWordBoundary = true;
+
+ m_splitter->toNextBoundary();
+ }
+
+ if (m_analysis[i] == itemAnalysis
+ && m_analysis[i].flags < QScriptAnalysis::TabOrObject
+ && !atWordBoundary
+ && i - start < MaxItemLength)
+ continue;
+
+ m_items.append(QScriptItem(start, itemAnalysis));
+ start = i;
+ itemAnalysis = m_analysis[start];
+
+ if (atWordBoundary)
+ itemAnalysis.flags = QScriptAnalysis::Uppercase;
+ }
+ m_items.append(QScriptItem(start, itemAnalysis));
+ }
+
+ void generateScriptItemsSmallCaps(const ushort *uc, int start, int length)
+ {
+ if (!length)
+ return;
+ bool lower = (QChar::category(uc[start]) == QChar::Letter_Lowercase);
+ const int end = start + length;
+ // split text into parts that are already uppercase and parts that are lowercase, and mark the latter to be uppercased later.
+ for (int i = start + 1; i < end; ++i) {
+ bool l = (QChar::category(uc[i]) == QChar::Letter_Lowercase);
+ if ((m_analysis[i] == m_analysis[start])
+ && m_analysis[i].flags < QScriptAnalysis::TabOrObject
+ && l == lower
+ && i - start < MaxItemLength)
+ continue;
+ m_items.append(QScriptItem(start, m_analysis[start]));
+ if (lower)
+ m_items.last().analysis.flags = QScriptAnalysis::SmallCaps;
+
+ start = i;
+ lower = l;
+ }
+ m_items.append(QScriptItem(start, m_analysis[start]));
+ if (lower)
+ m_items.last().analysis.flags = QScriptAnalysis::SmallCaps;
+ }
+
+ const QString &m_string;
+ const QScriptAnalysis * const m_analysis;
+ QScriptItemArray &m_items;
+ QTextBoundaryFinder *m_splitter;
+};
+}
+
+
+// ----------------------------------------------------------------------------
+//
+// The BiDi algorithm
+//
+// ----------------------------------------------------------------------------
+
+#define BIDI_DEBUG 0
+#if (BIDI_DEBUG >= 1)
+QT_BEGIN_INCLUDE_NAMESPACE
+#include <iostream>
+QT_END_INCLUDE_NAMESPACE
+using namespace std;
+
+static const char *directions[] = {
+ "DirL", "DirR", "DirEN", "DirES", "DirET", "DirAN", "DirCS", "DirB", "DirS", "DirWS", "DirON",
+ "DirLRE", "DirLRO", "DirAL", "DirRLE", "DirRLO", "DirPDF", "DirNSM", "DirBN"
+};
+
+#endif
+
+struct QBidiStatus {
+ QBidiStatus() {
+ eor = QChar::DirON;
+ lastStrong = QChar::DirON;
+ last = QChar:: DirON;
+ dir = QChar::DirON;
+ }
+ QChar::Direction eor;
+ QChar::Direction lastStrong;
+ QChar::Direction last;
+ QChar::Direction dir;
+};
+
+enum { MaxBidiLevel = 61 };
+
+struct QBidiControl {
+ inline QBidiControl(bool rtl)
+ : cCtx(0), base(rtl ? 1 : 0), level(rtl ? 1 : 0), override(false) {}
+
+ inline void embed(bool rtl, bool o = false) {
+ unsigned int toAdd = 1;
+ if((level%2 != 0) == rtl ) {
+ ++toAdd;
+ }
+ if (level + toAdd <= MaxBidiLevel) {
+ ctx[cCtx].level = level;
+ ctx[cCtx].override = override;
+ cCtx++;
+ override = o;
+ level += toAdd;
+ }
+ }
+ inline bool canPop() const { return cCtx != 0; }
+ inline void pdf() {
+ Q_ASSERT(cCtx);
+ --cCtx;
+ level = ctx[cCtx].level;
+ override = ctx[cCtx].override;
+ }
+
+ inline QChar::Direction basicDirection() const {
+ return (base ? QChar::DirR : QChar:: DirL);
+ }
+ inline unsigned int baseLevel() const {
+ return base;
+ }
+ inline QChar::Direction direction() const {
+ return ((level%2) ? QChar::DirR : QChar:: DirL);
+ }
+
+ struct {
+ unsigned int level;
+ bool override;
+ } ctx[MaxBidiLevel];
+ unsigned int cCtx;
+ const unsigned int base;
+ unsigned int level;
+ bool override;
+};
+
+
+static void appendItems(QScriptAnalysis *analysis, int &start, int &stop, const QBidiControl &control, QChar::Direction dir)
+{
+ if (start > stop)
+ return;
+
+ int level = control.level;
+
+ if(dir != QChar::DirON && !control.override) {
+ // add level of run (cases I1 & I2)
+ if(level % 2) {
+ if(dir == QChar::DirL || dir == QChar::DirAN || dir == QChar::DirEN)
+ level++;
+ } else {
+ if(dir == QChar::DirR)
+ level++;
+ else if(dir == QChar::DirAN || dir == QChar::DirEN)
+ level += 2;
+ }
+ }
+
+#if (BIDI_DEBUG >= 1)
+ qDebug("new run: dir=%s from %d, to %d level = %d override=%d", directions[dir], start, stop, level, control.override);
+#endif
+ QScriptAnalysis *s = analysis + start;
+ const QScriptAnalysis *e = analysis + stop;
+ while (s <= e) {
+ s->bidiLevel = level;
+ ++s;
+ }
+ ++stop;
+ start = stop;
+}
+
+
+// creates the next QScript items.
+static bool bidiItemize(QTextEngine *engine, QScriptAnalysis *analysis, QBidiControl &control)
+{
+ bool rightToLeft = (control.basicDirection() == 1);
+ bool hasBidi = rightToLeft;
+#if BIDI_DEBUG >= 2
+ qDebug() << "bidiItemize: rightToLeft=" << rightToLeft << engine->layoutData->string;
+#endif
+
+ int sor = 0;
+ int eor = -1;
+
+
+ int length = engine->layoutData->string.length();
+
+ const ushort *unicode = (const ushort *)engine->layoutData->string.unicode();
+ int current = 0;
+
+ QChar::Direction dir = rightToLeft ? QChar::DirR : QChar::DirL;
+ QBidiStatus status;
+
+ QChar::Direction sdir = QChar::direction(*unicode);
+ if (sdir != QChar::DirL && sdir != QChar::DirR && sdir != QChar::DirEN && sdir != QChar::DirAN)
+ sdir = QChar::DirON;
+ else
+ dir = QChar::DirON;
+ status.eor = sdir;
+ status.lastStrong = rightToLeft ? QChar::DirR : QChar::DirL;
+ status.last = status.lastStrong;
+ status.dir = sdir;
+
+
+ while (current <= length) {
+
+ QChar::Direction dirCurrent;
+ if (current == (int)length)
+ dirCurrent = control.basicDirection();
+ else
+ dirCurrent = QChar::direction(unicode[current]);
+
+#if (BIDI_DEBUG >= 2)
+// qDebug() << "pos=" << current << " dir=" << directions[dir]
+// << " current=" << directions[dirCurrent] << " last=" << directions[status.last]
+// << " eor=" << eor << '/' << directions[status.eor]
+// << " sor=" << sor << " lastStrong="
+// << directions[status.lastStrong]
+// << " level=" << (int)control.level << " override=" << (bool)control.override;
+#endif
+
+ switch(dirCurrent) {
+
+ // embedding and overrides (X1-X9 in the BiDi specs)
+ case QChar::DirRLE:
+ case QChar::DirRLO:
+ case QChar::DirLRE:
+ case QChar::DirLRO:
+ {
+ bool rtl = (dirCurrent == QChar::DirRLE || dirCurrent == QChar::DirRLO);
+ hasBidi |= rtl;
+ bool override = (dirCurrent == QChar::DirLRO || dirCurrent == QChar::DirRLO);
+
+ unsigned int level = control.level+1;
+ if ((level%2 != 0) == rtl) ++level;
+ if(level < MaxBidiLevel) {
+ eor = current-1;
+ appendItems(analysis, sor, eor, control, dir);
+ eor = current;
+ control.embed(rtl, override);
+ QChar::Direction edir = (rtl ? QChar::DirR : QChar::DirL);
+ dir = status.eor = edir;
+ status.lastStrong = edir;
+ }
+ break;
+ }
+ case QChar::DirPDF:
+ {
+ if (control.canPop()) {
+ if (dir != control.direction()) {
+ eor = current-1;
+ appendItems(analysis, sor, eor, control, dir);
+ dir = control.direction();
+ }
+ eor = current;
+ appendItems(analysis, sor, eor, control, dir);
+ control.pdf();
+ dir = QChar::DirON; status.eor = QChar::DirON;
+ status.last = control.direction();
+ if (control.override)
+ dir = control.direction();
+ else
+ dir = QChar::DirON;
+ status.lastStrong = control.direction();
+ }
+ break;
+ }
+
+ // strong types
+ case QChar::DirL:
+ if(dir == QChar::DirON)
+ dir = QChar::DirL;
+ switch(status.last)
+ {
+ case QChar::DirL:
+ eor = current; status.eor = QChar::DirL; break;
+ case QChar::DirR:
+ case QChar::DirAL:
+ case QChar::DirEN:
+ case QChar::DirAN:
+ if (eor >= 0) {
+ appendItems(analysis, sor, eor, control, dir);
+ dir = eor < length ? QChar::direction(unicode[eor]) : control.basicDirection();
+ status.eor = dir;
+ } else {
+ eor = current; status.eor = dir;
+ }
+ break;
+ case QChar::DirES:
+ case QChar::DirET:
+ case QChar::DirCS:
+ case QChar::DirBN:
+ case QChar::DirB:
+ case QChar::DirS:
+ case QChar::DirWS:
+ case QChar::DirON:
+ if(dir != QChar::DirL) {
+ //last stuff takes embedding dir
+ if(control.direction() == QChar::DirR) {
+ if(status.eor != QChar::DirR) {
+ // AN or EN
+ appendItems(analysis, sor, eor, control, dir);
+ status.eor = QChar::DirON;
+ dir = QChar::DirR;
+ }
+ eor = current - 1;
+ appendItems(analysis, sor, eor, control, dir);
+ dir = eor < length ? QChar::direction(unicode[eor]) : control.basicDirection();
+ status.eor = dir;
+ } else {
+ if(status.eor != QChar::DirL) {
+ appendItems(analysis, sor, eor, control, dir);
+ status.eor = QChar::DirON;
+ dir = QChar::DirL;
+ } else {
+ eor = current; status.eor = QChar::DirL; break;
+ }
+ }
+ } else {
+ eor = current; status.eor = QChar::DirL;
+ }
+ default:
+ break;
+ }
+ status.lastStrong = QChar::DirL;
+ break;
+ case QChar::DirAL:
+ case QChar::DirR:
+ hasBidi = true;
+ if(dir == QChar::DirON) dir = QChar::DirR;
+ switch(status.last)
+ {
+ case QChar::DirL:
+ case QChar::DirEN:
+ case QChar::DirAN:
+ if (eor >= 0)
+ appendItems(analysis, sor, eor, control, dir);
+ // fall through
+ case QChar::DirR:
+ case QChar::DirAL:
+ dir = QChar::DirR; eor = current; status.eor = QChar::DirR; break;
+ case QChar::DirES:
+ case QChar::DirET:
+ case QChar::DirCS:
+ case QChar::DirBN:
+ case QChar::DirB:
+ case QChar::DirS:
+ case QChar::DirWS:
+ case QChar::DirON:
+ if(status.eor != QChar::DirR && status.eor != QChar::DirAL) {
+ //last stuff takes embedding dir
+ if(control.direction() == QChar::DirR
+ || status.lastStrong == QChar::DirR || status.lastStrong == QChar::DirAL) {
+ appendItems(analysis, sor, eor, control, dir);
+ dir = QChar::DirR; status.eor = QChar::DirON;
+ eor = current;
+ } else {
+ eor = current - 1;
+ appendItems(analysis, sor, eor, control, dir);
+ dir = QChar::DirR; status.eor = QChar::DirON;
+ }
+ } else {
+ eor = current; status.eor = QChar::DirR;
+ }
+ default:
+ break;
+ }
+ status.lastStrong = dirCurrent;
+ break;
+
+ // weak types:
+
+ case QChar::DirNSM:
+ if (eor == current-1)
+ eor = current;
+ break;
+ case QChar::DirEN:
+ // if last strong was AL change EN to AN
+ if(status.lastStrong != QChar::DirAL) {
+ if(dir == QChar::DirON) {
+ if(status.lastStrong == QChar::DirL)
+ dir = QChar::DirL;
+ else
+ dir = QChar::DirEN;
+ }
+ switch(status.last)
+ {
+ case QChar::DirET:
+ if (status.lastStrong == QChar::DirR || status.lastStrong == QChar::DirAL) {
+ appendItems(analysis, sor, eor, control, dir);
+ status.eor = QChar::DirON;
+ dir = QChar::DirAN;
+ }
+ // fall through
+ case QChar::DirEN:
+ case QChar::DirL:
+ eor = current;
+ status.eor = dirCurrent;
+ break;
+ case QChar::DirR:
+ case QChar::DirAL:
+ case QChar::DirAN:
+ if (eor >= 0)
+ appendItems(analysis, sor, eor, control, dir);
+ else
+ eor = current;
+ status.eor = QChar::DirEN;
+ dir = QChar::DirAN; break;
+ case QChar::DirES:
+ case QChar::DirCS:
+ if(status.eor == QChar::DirEN || dir == QChar::DirAN) {
+ eor = current; break;
+ }
+ case QChar::DirBN:
+ case QChar::DirB:
+ case QChar::DirS:
+ case QChar::DirWS:
+ case QChar::DirON:
+ if(status.eor == QChar::DirR) {
+ // neutrals go to R
+ eor = current - 1;
+ appendItems(analysis, sor, eor, control, dir);
+ dir = QChar::DirON; status.eor = QChar::DirEN;
+ dir = QChar::DirAN;
+ }
+ else if(status.eor == QChar::DirL ||
+ (status.eor == QChar::DirEN && status.lastStrong == QChar::DirL)) {
+ eor = current; status.eor = dirCurrent;
+ } else {
+ // numbers on both sides, neutrals get right to left direction
+ if(dir != QChar::DirL) {
+ appendItems(analysis, sor, eor, control, dir);
+ dir = QChar::DirON; status.eor = QChar::DirON;
+ eor = current - 1;
+ dir = QChar::DirR;
+ appendItems(analysis, sor, eor, control, dir);
+ dir = QChar::DirON; status.eor = QChar::DirON;
+ dir = QChar::DirAN;
+ } else {
+ eor = current; status.eor = dirCurrent;
+ }
+ }
+ default:
+ break;
+ }
+ break;
+ }
+ case QChar::DirAN:
+ hasBidi = true;
+ dirCurrent = QChar::DirAN;
+ if(dir == QChar::DirON) dir = QChar::DirAN;
+ switch(status.last)
+ {
+ case QChar::DirL:
+ case QChar::DirAN:
+ eor = current; status.eor = QChar::DirAN; break;
+ case QChar::DirR:
+ case QChar::DirAL:
+ case QChar::DirEN:
+ if (eor >= 0){
+ appendItems(analysis, sor, eor, control, dir);
+ } else {
+ eor = current;
+ }
+ dir = QChar::DirON; status.eor = QChar::DirAN;
+ break;
+ case QChar::DirCS:
+ if(status.eor == QChar::DirAN) {
+ eor = current; break;
+ }
+ case QChar::DirES:
+ case QChar::DirET:
+ case QChar::DirBN:
+ case QChar::DirB:
+ case QChar::DirS:
+ case QChar::DirWS:
+ case QChar::DirON:
+ if(status.eor == QChar::DirR) {
+ // neutrals go to R
+ eor = current - 1;
+ appendItems(analysis, sor, eor, control, dir);
+ status.eor = QChar::DirAN;
+ dir = QChar::DirAN;
+ } else if(status.eor == QChar::DirL ||
+ (status.eor == QChar::DirEN && status.lastStrong == QChar::DirL)) {
+ eor = current; status.eor = dirCurrent;
+ } else {
+ // numbers on both sides, neutrals get right to left direction
+ if(dir != QChar::DirL) {
+ appendItems(analysis, sor, eor, control, dir);
+ status.eor = QChar::DirON;
+ eor = current - 1;
+ dir = QChar::DirR;
+ appendItems(analysis, sor, eor, control, dir);
+ status.eor = QChar::DirAN;
+ dir = QChar::DirAN;
+ } else {
+ eor = current; status.eor = dirCurrent;
+ }
+ }
+ default:
+ break;
+ }
+ break;
+ case QChar::DirES:
+ case QChar::DirCS:
+ break;
+ case QChar::DirET:
+ if(status.last == QChar::DirEN) {
+ dirCurrent = QChar::DirEN;
+ eor = current; status.eor = dirCurrent;
+ }
+ break;
+
+ // boundary neutrals should be ignored
+ case QChar::DirBN:
+ break;
+ // neutrals
+ case QChar::DirB:
+ // ### what do we do with newline and paragraph separators that come to here?
+ break;
+ case QChar::DirS:
+ // ### implement rule L1
+ break;
+ case QChar::DirWS:
+ case QChar::DirON:
+ break;
+ default:
+ break;
+ }
+
+ //qDebug() << " after: dir=" << // dir << " current=" << dirCurrent << " last=" << status.last << " eor=" << status.eor << " lastStrong=" << status.lastStrong << " embedding=" << control.direction();
+
+ if(current >= (int)length) break;
+
+ // set status.last as needed.
+ switch(dirCurrent) {
+ case QChar::DirET:
+ case QChar::DirES:
+ case QChar::DirCS:
+ case QChar::DirS:
+ case QChar::DirWS:
+ case QChar::DirON:
+ switch(status.last)
+ {
+ case QChar::DirL:
+ case QChar::DirR:
+ case QChar::DirAL:
+ case QChar::DirEN:
+ case QChar::DirAN:
+ status.last = dirCurrent;
+ break;
+ default:
+ status.last = QChar::DirON;
+ }
+ break;
+ case QChar::DirNSM:
+ case QChar::DirBN:
+ // ignore these
+ break;
+ case QChar::DirLRO:
+ case QChar::DirLRE:
+ status.last = QChar::DirL;
+ break;
+ case QChar::DirRLO:
+ case QChar::DirRLE:
+ status.last = QChar::DirR;
+ break;
+ case QChar::DirEN:
+ if (status.last == QChar::DirL) {
+ status.last = QChar::DirL;
+ break;
+ }
+ // fall through
+ default:
+ status.last = dirCurrent;
+ }
+
+ ++current;
+ }
+
+#if (BIDI_DEBUG >= 1)
+ qDebug() << "reached end of line current=" << current << ", eor=" << eor;
+#endif
+ eor = current - 1; // remove dummy char
+
+ if (sor <= eor)
+ appendItems(analysis, sor, eor, control, dir);
+
+ return hasBidi;
+}
+
+void QTextEngine::bidiReorder(int numItems, const quint8 *levels, int *visualOrder)
+{
+
+ // first find highest and lowest levels
+ quint8 levelLow = 128;
+ quint8 levelHigh = 0;
+ int i = 0;
+ while (i < numItems) {
+ //printf("level = %d\n", r->level);
+ if (levels[i] > levelHigh)
+ levelHigh = levels[i];
+ if (levels[i] < levelLow)
+ levelLow = levels[i];
+ i++;
+ }
+
+ // implements reordering of the line (L2 according to BiDi spec):
+ // L2. From the highest level found in the text to the lowest odd level on each line,
+ // reverse any contiguous sequence of characters that are at that level or higher.
+
+ // reversing is only done up to the lowest odd level
+ if(!(levelLow%2)) levelLow++;
+
+#if (BIDI_DEBUG >= 1)
+// qDebug() << "reorderLine: lineLow = " << (uint)levelLow << ", lineHigh = " << (uint)levelHigh;
+#endif
+
+ int count = numItems - 1;
+ for (i = 0; i < numItems; i++)
+ visualOrder[i] = i;
+
+ while(levelHigh >= levelLow) {
+ int i = 0;
+ while (i < count) {
+ while(i < count && levels[i] < levelHigh) i++;
+ int start = i;
+ while(i <= count && levels[i] >= levelHigh) i++;
+ int end = i-1;
+
+ if(start != end) {
+ //qDebug() << "reversing from " << start << " to " << end;
+ for(int j = 0; j < (end-start+1)/2; j++) {
+ int tmp = visualOrder[start+j];
+ visualOrder[start+j] = visualOrder[end-j];
+ visualOrder[end-j] = tmp;
+ }
+ }
+ i++;
+ }
+ levelHigh--;
+ }
+
+#if (BIDI_DEBUG >= 1)
+// qDebug() << "visual order is:";
+// for (i = 0; i < numItems; i++)
+// qDebug() << visualOrder[i];
+#endif
+}
+
+QT_BEGIN_INCLUDE_NAMESPACE
+
+#if defined(Q_WS_X11) || defined (Q_WS_QWS)
+# include "qfontengine_ft_p.h"
+#elif defined(Q_WS_MAC)
+# include "qtextengine_mac.cpp"
+#endif
+
+#include <private/qharfbuzz_p.h>
+
+QT_END_INCLUDE_NAMESPACE
+
+// ask the font engine to find out which glyphs (as an index in the specific font) to use for the text in one item.
+static bool stringToGlyphs(HB_ShaperItem *item, QGlyphLayout *glyphs, QFontEngine *fontEngine)
+{
+ int nGlyphs = item->num_glyphs;
+
+ QTextEngine::ShaperFlags shaperFlags(QTextEngine::GlyphIndicesOnly);
+ if (item->item.bidiLevel % 2)
+ shaperFlags |= QTextEngine::RightToLeft;
+
+ bool result = fontEngine->stringToCMap(reinterpret_cast<const QChar *>(item->string + item->item.pos), item->item.length, glyphs, &nGlyphs, shaperFlags);
+ item->num_glyphs = nGlyphs;
+ glyphs->numGlyphs = nGlyphs;
+ return result;
+}
+
+// shape all the items that intersect with the line, taking tab widths into account to find out what text actually fits in the line.
+void QTextEngine::shapeLine(const QScriptLine &line)
+{
+ QFixed x;
+ bool first = true;
+ const int end = findItem(line.from + line.length - 1);
+ int item = findItem(line.from);
+ if (item == -1)
+ return;
+ for (item = findItem(line.from); item <= end; ++item) {
+ QScriptItem &si = layoutData->items[item];
+ if (si.analysis.flags == QScriptAnalysis::Tab) {
+ ensureSpace(1);
+ si.width = calculateTabWidth(item, x);
+ } else {
+ shape(item);
+ }
+ if (first && si.position != line.from) { // that means our x position has to be offset
+ QGlyphLayout glyphs = shapedGlyphs(&si);
+ Q_ASSERT(line.from > si.position);
+ for (int i = line.from - si.position - 1; i >= 0; i--) {
+ x -= glyphs.effectiveAdvance(i);
+ }
+ }
+ first = false;
+
+ x += si.width;
+ }
+}
+
+extern int qt_defaultDpiY(); // in qfont.cpp
+
+void QTextEngine::shapeText(int item) const
+{
+ Q_ASSERT(item < layoutData->items.size());
+ QScriptItem &si = layoutData->items[item];
+
+ if (si.num_glyphs)
+ return;
+
+#if defined(Q_WS_MAC)
+ shapeTextMac(item);
+#elif defined(Q_WS_WINCE)
+ shapeTextWithCE(item);
+#else
+ shapeTextWithHarfbuzz(item);
+#endif
+
+ si.width = 0;
+
+ if (!si.num_glyphs)
+ return;
+ QGlyphLayout glyphs = shapedGlyphs(&si);
+
+ QFont font = this->font(si);
+ bool letterSpacingIsAbsolute = font.d->letterSpacingIsAbsolute;
+ QFixed letterSpacing = font.d->letterSpacing;
+ QFixed wordSpacing = font.d->wordSpacing;
+
+ if (letterSpacingIsAbsolute)
+ letterSpacing *= font.d->dpi / qt_defaultDpiY();
+
+ if (letterSpacing != 0) {
+ for (int i = 1; i < si.num_glyphs; ++i) {
+ if (glyphs.attributes[i].clusterStart) {
+ if (letterSpacingIsAbsolute)
+ glyphs.advances_x[i-1] += letterSpacing;
+ else {
+ const QFixed advance = glyphs.advances_x[i-1];
+ glyphs.advances_x[i-1] += (letterSpacing - 100) * advance / 100;
+ }
+ }
+ }
+ if (letterSpacingIsAbsolute)
+ glyphs.advances_x[si.num_glyphs-1] += letterSpacing;
+ else {
+ const QFixed advance = glyphs.advances_x[si.num_glyphs-1];
+ glyphs.advances_x[si.num_glyphs-1] += (letterSpacing - 100) * advance / 100;
+ }
+ }
+ if (wordSpacing != 0) {
+ for (int i = 0; i < si.num_glyphs; ++i) {
+ if (glyphs.attributes[i].justification == HB_Space
+ || glyphs.attributes[i].justification == HB_Arabic_Space) {
+ // word spacing only gets added once to a consecutive run of spaces (see CSS spec)
+ if (i + 1 == si.num_glyphs
+ ||(glyphs.attributes[i+1].justification != HB_Space
+ && glyphs.attributes[i+1].justification != HB_Arabic_Space))
+ glyphs.advances_x[i] += wordSpacing;
+ }
+ }
+ }
+
+ for (int i = 0; i < si.num_glyphs; ++i)
+ si.width += glyphs.advances_x[i];
+}
+
+#if defined(Q_WS_WINCE) //TODO
+// set the glyph attributes heuristically. Assumes a 1 to 1 relationship between chars and glyphs
+// and no reordering.
+// also computes logClusters heuristically
+static void heuristicSetGlyphAttributes(const QChar *uc, int length, QGlyphLayout *glyphs, unsigned short *logClusters, int num_glyphs)
+{
+ // ### zeroWidth and justification are missing here!!!!!
+
+ Q_UNUSED(num_glyphs);
+ Q_ASSERT(num_glyphs <= length);
+
+// qDebug("QScriptEngine::heuristicSetGlyphAttributes, num_glyphs=%d", item->num_glyphs);
+
+ int glyph_pos = 0;
+ for (int i = 0; i < length; i++) {
+ if (uc[i].unicode() >= 0xd800 && uc[i].unicode() < 0xdc00 && i < length-1
+ && uc[i+1].unicode() >= 0xdc00 && uc[i+1].unicode() < 0xe000) {
+ logClusters[i] = glyph_pos;
+ logClusters[++i] = glyph_pos;
+ } else {
+ logClusters[i] = glyph_pos;
+ }
+ ++glyph_pos;
+ }
+
+ // first char in a run is never (treated as) a mark
+ int cStart = 0;
+
+ const bool symbolFont = false; // ####
+ glyphs->attributes[0].mark = false;
+ glyphs->attributes[0].clusterStart = true;
+ glyphs->attributes[0].dontPrint = (!symbolFont && uc[0].unicode() == 0x00ad) || qIsControlChar(uc[0].unicode());
+
+ int pos = 0;
+ int lastCat = QChar::category(uc[0].unicode());
+ for (int i = 1; i < length; ++i) {
+ if (logClusters[i] == pos)
+ // same glyph
+ continue;
+ ++pos;
+ while (pos < logClusters[i]) {
+ glyphs[pos].attributes = glyphs[pos-1].attributes;
+ ++pos;
+ }
+ // hide soft-hyphens by default
+ if ((!symbolFont && uc[i].unicode() == 0x00ad) || qIsControlChar(uc[i].unicode()))
+ glyphs->attributes[pos].dontPrint = true;
+ const QUnicodeTables::Properties *prop = QUnicodeTables::properties(uc[i].unicode());
+ int cat = prop->category;
+ if (cat != QChar::Mark_NonSpacing) {
+ glyphs->attributes[pos].mark = false;
+ glyphs->attributes[pos].clusterStart = true;
+ glyphs->attributes[pos].combiningClass = 0;
+ cStart = logClusters[i];
+ } else {
+ int cmb = prop->combiningClass;
+
+ if (cmb == 0) {
+ // Fix 0 combining classes
+ if ((uc[pos].unicode() & 0xff00) == 0x0e00) {
+ // thai or lao
+ unsigned char col = uc[pos].cell();
+ if (col == 0x31 ||
+ col == 0x34 ||
+ col == 0x35 ||
+ col == 0x36 ||
+ col == 0x37 ||
+ col == 0x47 ||
+ col == 0x4c ||
+ col == 0x4d ||
+ col == 0x4e) {
+ cmb = QChar::Combining_AboveRight;
+ } else if (col == 0xb1 ||
+ col == 0xb4 ||
+ col == 0xb5 ||
+ col == 0xb6 ||
+ col == 0xb7 ||
+ col == 0xbb ||
+ col == 0xcc ||
+ col == 0xcd) {
+ cmb = QChar::Combining_Above;
+ } else if (col == 0xbc) {
+ cmb = QChar::Combining_Below;
+ }
+ }
+ }
+
+ glyphs->attributes[pos].mark = true;
+ glyphs->attributes[pos].clusterStart = false;
+ glyphs->attributes[pos].combiningClass = cmb;
+ logClusters[i] = cStart;
+ glyphs->advances_x[pos] = 0;
+ glyphs->advances_y[pos] = 0;
+ }
+
+ // one gets an inter character justification point if the current char is not a non spacing mark.
+ // as then the current char belongs to the last one and one gets a space justification point
+ // after the space char.
+ if (lastCat == QChar::Separator_Space)
+ glyphs->attributes[pos-1].justification = HB_Space;
+ else if (cat != QChar::Mark_NonSpacing)
+ glyphs->attributes[pos-1].justification = HB_Character;
+ else
+ glyphs->attributes[pos-1].justification = HB_NoJustification;
+
+ lastCat = cat;
+ }
+ pos = logClusters[length-1];
+ if (lastCat == QChar::Separator_Space)
+ glyphs->attributes[pos].justification = HB_Space;
+ else
+ glyphs->attributes[pos].justification = HB_Character;
+}
+
+void QTextEngine::shapeTextWithCE(int item) const
+{
+ QScriptItem &si = layoutData->items[item];
+ si.glyph_data_offset = layoutData->used;
+
+ QFontEngine *fe = fontEngine(si, &si.ascent, &si.descent);
+
+ QTextEngine::ShaperFlags flags;
+ if (si.analysis.bidiLevel % 2)
+ flags |= RightToLeft;
+ if (option.useDesignMetrics())
+ flags |= DesignMetrics;
+
+ attributes(); // pre-initialize char attributes
+
+ const int len = length(item);
+ int num_glyphs = length(item);
+ const QChar *str = layoutData->string.unicode() + si.position;
+ ushort upperCased[256];
+ if (si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase
+ || si.analysis.flags == QScriptAnalysis::Lowercase) {
+ ushort *uc = upperCased;
+ if (len > 256)
+ uc = new ushort[len];
+ for (int i = 0; i < len; ++i) {
+ if(si.analysis.flags == QScriptAnalysis::Lowercase)
+ uc[i] = str[i].toLower().unicode();
+ else
+ uc[i] = str[i].toUpper().unicode();
+ }
+ str = reinterpret_cast<const QChar *>(uc);
+ }
+
+ while (true) {
+ ensureSpace(num_glyphs);
+ num_glyphs = layoutData->glyphLayout.numGlyphs - layoutData->used;
+
+ QGlyphLayout g = availableGlyphs(&si);
+ unsigned short *log_clusters = logClusters(&si);
+
+ if (fe->stringToCMap(str,
+ len,
+ &g,
+ &num_glyphs,
+ flags)) {
+ heuristicSetGlyphAttributes(str, len, &g, log_clusters, num_glyphs);
+ break;
+ }
+ }
+
+ si.num_glyphs = num_glyphs;
+
+ layoutData->used += si.num_glyphs;
+
+ const ushort *uc = reinterpret_cast<const ushort *>(str);
+ if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase
+ || si.analysis.flags == QScriptAnalysis::Lowercase)
+ && uc != upperCased)
+ delete [] uc;
+}
+#endif
+
+static inline void moveGlyphData(const QGlyphLayout &destination, const QGlyphLayout &source, int num)
+{
+ if (num > 0 && destination.glyphs != source.glyphs) {
+ memmove(destination.glyphs, source.glyphs, num * sizeof(HB_Glyph));
+ memmove(destination.attributes, source.attributes, num * sizeof(HB_GlyphAttributes));
+ memmove(destination.advances_x, source.advances_x, num * sizeof(HB_Fixed));
+ memmove(destination.offsets, source.offsets, num * sizeof(HB_FixedPoint));
+ }
+}
+
+/// take the item from layoutData->items and
+void QTextEngine::shapeTextWithHarfbuzz(int item) const
+{
+ Q_ASSERT(sizeof(HB_Fixed) == sizeof(QFixed));
+ Q_ASSERT(sizeof(HB_FixedPoint) == sizeof(QFixedPoint));
+
+ QScriptItem &si = layoutData->items[item];
+
+ si.glyph_data_offset = layoutData->used;
+
+ QFontEngine *font = fontEngine(si, &si.ascent, &si.descent);
+
+ bool kerningEnabled = this->font(si).d->kerning;
+
+ HB_ShaperItem entire_shaper_item;
+ entire_shaper_item.kerning_applied = false;
+ entire_shaper_item.string = reinterpret_cast<const HB_UChar16 *>(layoutData->string.constData());
+ entire_shaper_item.stringLength = layoutData->string.length();
+ entire_shaper_item.item.script = (HB_Script)si.analysis.script;
+ entire_shaper_item.item.pos = si.position;
+ entire_shaper_item.item.length = length(item);
+ entire_shaper_item.item.bidiLevel = si.analysis.bidiLevel;
+ entire_shaper_item.glyphIndicesPresent = false;
+
+ HB_UChar16 upperCased[256]; // XXX what about making this 4096, so we don't have to extend it ever.
+ if (si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase
+ || si.analysis.flags == QScriptAnalysis::Lowercase) {
+ HB_UChar16 *uc = upperCased;
+ if (entire_shaper_item.item.length > 256)
+ uc = new HB_UChar16[entire_shaper_item.item.length];
+ for (uint i = 0; i < entire_shaper_item.item.length; ++i) {
+ if(si.analysis.flags == QScriptAnalysis::Lowercase)
+ uc[i] = QChar::toLower(entire_shaper_item.string[si.position + i]);
+ else
+ uc[i] = QChar::toUpper(entire_shaper_item.string[si.position + i]);
+ }
+ entire_shaper_item.item.pos = 0;
+ entire_shaper_item.string = uc;
+ entire_shaper_item.stringLength = entire_shaper_item.item.length;
+ }
+
+ entire_shaper_item.shaperFlags = 0;
+ if (!kerningEnabled)
+ entire_shaper_item.shaperFlags |= HB_ShaperFlag_NoKerning;
+ if (option.useDesignMetrics())
+ entire_shaper_item.shaperFlags |= HB_ShaperFlag_UseDesignMetrics;
+
+ entire_shaper_item.num_glyphs = qMax(layoutData->glyphLayout.numGlyphs - layoutData->used, int(entire_shaper_item.item.length));
+ ensureSpace(entire_shaper_item.num_glyphs);
+ QGlyphLayout initialGlyphs = availableGlyphs(&si).mid(0, entire_shaper_item.num_glyphs);
+
+ if (!stringToGlyphs(&entire_shaper_item, &initialGlyphs, font)) {
+ ensureSpace(entire_shaper_item.num_glyphs);
+ initialGlyphs = availableGlyphs(&si).mid(0, entire_shaper_item.num_glyphs);
+
+ if (!stringToGlyphs(&entire_shaper_item, &initialGlyphs, font)) {
+ // ############ if this happens there's a bug in the fontengine
+ if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase
+ || si.analysis.flags == QScriptAnalysis::Lowercase) && entire_shaper_item.string != upperCased)
+ delete [] const_cast<HB_UChar16 *>(entire_shaper_item.string);
+ return;
+ }
+ }
+
+ // split up the item into parts that come from different font engines.
+ QVarLengthArray<int> itemBoundaries(2);
+ // k * 2 entries, array[k] == index in string, array[k + 1] == index in glyphs
+ itemBoundaries[0] = entire_shaper_item.item.pos;
+ itemBoundaries[1] = 0;
+
+ if (font->type() == QFontEngine::Multi) {
+ uint lastEngine = 0;
+ int charIdx = entire_shaper_item.item.pos;
+ const int stringEnd = charIdx + entire_shaper_item.item.length;
+ for (quint32 i = 0; i < entire_shaper_item.num_glyphs; ++i, ++charIdx) {
+ uint engineIdx = initialGlyphs.glyphs[i] >> 24;
+ if (engineIdx != lastEngine && i > 0) {
+ itemBoundaries.append(charIdx);
+ itemBoundaries.append(i);
+ }
+ lastEngine = engineIdx;
+ if (HB_IsHighSurrogate(entire_shaper_item.string[charIdx])
+ && charIdx < stringEnd - 1
+ && HB_IsLowSurrogate(entire_shaper_item.string[charIdx + 1]))
+ ++charIdx;
+ }
+ }
+
+
+
+ int remaining_glyphs = entire_shaper_item.num_glyphs;
+ int glyph_pos = 0;
+ // for each item shape using harfbuzz and store the results in our layoutData's glyphs array.
+ for (int k = 0; k < itemBoundaries.size(); k += 2) { // for the +2, see the comment at the definition of itemBoundaries
+
+ HB_ShaperItem shaper_item = entire_shaper_item;
+
+ shaper_item.item.pos = itemBoundaries[k];
+ if (k < itemBoundaries.size() - 3) {
+ shaper_item.item.length = itemBoundaries[k + 2] - shaper_item.item.pos;
+ shaper_item.num_glyphs = itemBoundaries[k + 3] - itemBoundaries[k + 1];
+ } else { // last combo in the list, avoid out of bounds access.
+ shaper_item.item.length -= shaper_item.item.pos - entire_shaper_item.item.pos;
+ shaper_item.num_glyphs -= itemBoundaries[k + 1];
+ }
+ shaper_item.initialGlyphCount = shaper_item.num_glyphs;
+
+ QFontEngine *actualFontEngine = font;
+ uint engineIdx = 0;
+ if (font->type() == QFontEngine::Multi) {
+ engineIdx = uint(availableGlyphs(&si).glyphs[glyph_pos] >> 24);
+
+ actualFontEngine = static_cast<QFontEngineMulti *>(font)->engine(engineIdx);
+ }
+
+ shaper_item.font = actualFontEngine->harfbuzzFont();
+ shaper_item.face = actualFontEngine->harfbuzzFace();
+
+ shaper_item.glyphIndicesPresent = true;
+
+ remaining_glyphs -= shaper_item.initialGlyphCount;
+
+ do {
+ ensureSpace(glyph_pos + shaper_item.num_glyphs + remaining_glyphs);
+
+ const QGlyphLayout g = availableGlyphs(&si).mid(glyph_pos);
+ moveGlyphData(g.mid(shaper_item.num_glyphs), g.mid(shaper_item.initialGlyphCount), remaining_glyphs);
+
+ shaper_item.glyphs = g.glyphs;
+ shaper_item.attributes = g.attributes;
+ shaper_item.advances = reinterpret_cast<HB_Fixed *>(g.advances_x);
+ shaper_item.offsets = reinterpret_cast<HB_FixedPoint *>(g.offsets);
+
+ if (shaper_item.glyphIndicesPresent) {
+ for (hb_uint32 i = 0; i < shaper_item.initialGlyphCount; ++i)
+ shaper_item.glyphs[i] &= 0x00ffffff;
+ }
+
+ shaper_item.log_clusters = logClusters(&si) + shaper_item.item.pos - entire_shaper_item.item.pos;
+
+// qDebug(" .. num_glyphs=%d, used=%d, item.num_glyphs=%d", num_glyphs, used, shaper_item.num_glyphs);
+ } while (!qShapeItem(&shaper_item)); // this does the actual shaping via harfbuzz.
+
+ QGlyphLayout g = availableGlyphs(&si).mid(glyph_pos, shaper_item.num_glyphs);
+ moveGlyphData(g.mid(shaper_item.num_glyphs), g.mid(shaper_item.initialGlyphCount), remaining_glyphs);
+
+ for (hb_uint32 i = 0; i < shaper_item.num_glyphs; ++i)
+ g.glyphs[i] = g.glyphs[i] | (engineIdx << 24);
+
+ for (hb_uint32 i = 0; i < shaper_item.item.length; ++i)
+ shaper_item.log_clusters[i] += glyph_pos;
+
+ if (kerningEnabled && !shaper_item.kerning_applied)
+ font->doKerning(&g, option.useDesignMetrics() ? QFlag(QTextEngine::DesignMetrics) : QFlag(0));
+
+ glyph_pos += shaper_item.num_glyphs;
+ }
+
+// qDebug(" -> item: script=%d num_glyphs=%d", shaper_item.script, shaper_item.num_glyphs);
+ si.num_glyphs = glyph_pos;
+
+ layoutData->used += si.num_glyphs;
+
+ if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase)
+ && entire_shaper_item.string != upperCased)
+ delete [] const_cast<HB_UChar16 *>(entire_shaper_item.string);
+}
+
+static void init(QTextEngine *e)
+{
+ e->ignoreBidi = false;
+ e->cacheGlyphs = false;
+ e->forceJustification = false;
+
+ e->layoutData = 0;
+
+ e->minWidth = 0;
+ e->maxWidth = 0;
+
+ e->underlinePositions = 0;
+ e->specialData = 0;
+ e->stackEngine = false;
+}
+
+QTextEngine::QTextEngine()
+{
+ init(this);
+}
+
+QTextEngine::QTextEngine(const QString &str, const QFont &f)
+ : fnt(f)
+{
+ init(this);
+ text = str;
+}
+
+QTextEngine::~QTextEngine()
+{
+ if (!stackEngine)
+ delete layoutData;
+ delete specialData;
+}
+
+const HB_CharAttributes *QTextEngine::attributes() const
+{
+ if (layoutData && layoutData->haveCharAttributes)
+ return (HB_CharAttributes *) layoutData->memory;
+
+ itemize();
+ ensureSpace(layoutData->string.length());
+
+ QVarLengthArray<HB_ScriptItem> hbScriptItems(layoutData->items.size());
+
+ for (int i = 0; i < layoutData->items.size(); ++i) {
+ const QScriptItem &si = layoutData->items[i];
+ hbScriptItems[i].pos = si.position;
+ hbScriptItems[i].length = length(i);
+ hbScriptItems[i].bidiLevel = si.analysis.bidiLevel;
+ hbScriptItems[i].script = (HB_Script)si.analysis.script;
+ }
+
+ qGetCharAttributes(reinterpret_cast<const HB_UChar16 *>(layoutData->string.constData()),
+ layoutData->string.length(),
+ hbScriptItems.data(), hbScriptItems.size(),
+ (HB_CharAttributes *)layoutData->memory);
+
+
+ layoutData->haveCharAttributes = true;
+ return (HB_CharAttributes *) layoutData->memory;
+}
+
+void QTextEngine::shape(int item) const
+{
+ if (layoutData->items[item].analysis.flags == QScriptAnalysis::Object) {
+ ensureSpace(1);
+ if (block.docHandle()) {
+ QTextFormat format = formats()->format(formatIndex(&layoutData->items[item]));
+ docLayout()->resizeInlineObject(QTextInlineObject(item, const_cast<QTextEngine *>(this)),
+ layoutData->items[item].position + block.position(), format);
+ }
+ } else if (layoutData->items[item].analysis.flags == QScriptAnalysis::Tab) {
+ // set up at least the ascent/descent of the script item for the tab
+ fontEngine(layoutData->items[item], &layoutData->items[item].ascent, &layoutData->items[item].descent);
+ } else {
+ shapeText(item);
+ }
+}
+
+void QTextEngine::invalidate()
+{
+ freeMemory();
+ minWidth = 0;
+ maxWidth = 0;
+ if (specialData)
+ specialData->resolvedFormatIndices.clear();
+}
+
+void QTextEngine::clearLineData()
+{
+ lines.clear();
+}
+
+void QTextEngine::validate() const
+{
+ if (layoutData)
+ return;
+ layoutData = new LayoutData();
+ if (block.docHandle()) {
+ layoutData->string = block.text();
+ if (option.flags() & QTextOption::ShowLineAndParagraphSeparators)
+ layoutData->string += QLatin1Char(block.next().isValid() ? 0xb6 : 0x20);
+ } else {
+ layoutData->string = text;
+ }
+ if (specialData && specialData->preeditPosition != -1)
+ layoutData->string.insert(specialData->preeditPosition, specialData->preeditText);
+}
+
+void QTextEngine::itemize() const
+{
+ validate();
+ if (layoutData->items.size())
+ return;
+
+ int length = layoutData->string.length();
+ if (!length)
+ return;
+#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA)
+ // ATSUI requires RTL flags to correctly identify the character stops.
+ bool ignore = false;
+#else
+ bool ignore = ignoreBidi;
+#endif
+ if (!ignore && option.textDirection() == Qt::LeftToRight) {
+ ignore = true;
+ const QChar *start = layoutData->string.unicode();
+ const QChar * const end = start + length;
+ while (start < end) {
+ if (start->unicode() >= 0x590) {
+ ignore = false;
+ break;
+ }
+ ++start;
+ }
+ }
+
+ QVarLengthArray<QScriptAnalysis, 4096> scriptAnalysis(length);
+ QScriptAnalysis *analysis = scriptAnalysis.data();
+
+ QBidiControl control(option.textDirection() == Qt::RightToLeft);
+
+ if (ignore) {
+ memset(analysis, 0, length*sizeof(QScriptAnalysis));
+ if (option.textDirection() == Qt::RightToLeft) {
+ for (int i = 0; i < length; ++i)
+ analysis[i].bidiLevel = 1;
+ layoutData->hasBidi = true;
+ }
+ } else {
+ layoutData->hasBidi = bidiItemize(const_cast<QTextEngine *>(this), analysis, control);
+ }
+
+ const ushort *unicode = layoutData->string.utf16();
+ // correctly assign script, isTab and isObject to the script analysis
+ const ushort *uc = unicode;
+ const ushort *e = uc + length;
+ int lastScript = QUnicodeTables::Common;
+ while (uc < e) {
+ int script = QUnicodeTables::script(*uc);
+ if (script == QUnicodeTables::Inherited)
+ script = lastScript;
+ analysis->flags = QScriptAnalysis::None;
+ if (*uc == QChar::ObjectReplacementCharacter) {
+ if (analysis->bidiLevel % 2)
+ --analysis->bidiLevel;
+ analysis->script = QUnicodeTables::Common;
+ analysis->flags = QScriptAnalysis::Object;
+ } else if (*uc == QChar::LineSeparator) {
+ if (analysis->bidiLevel % 2)
+ --analysis->bidiLevel;
+ analysis->script = QUnicodeTables::Common;
+ analysis->flags = QScriptAnalysis::LineOrParagraphSeparator;
+ if (option.flags() & QTextOption::ShowLineAndParagraphSeparators)
+ *const_cast<ushort*>(uc) = 0x21B5; // visual line separator
+ } else if (*uc == 9) {
+ analysis->script = QUnicodeTables::Common;
+ analysis->flags = QScriptAnalysis::Tab;
+ analysis->bidiLevel = control.baseLevel();
+ } else if ((*uc == 32 || *uc == QChar::Nbsp)
+ && (option.flags() & QTextOption::ShowTabsAndSpaces)) {
+ analysis->script = QUnicodeTables::Common;
+ analysis->flags = QScriptAnalysis::Space;
+ analysis->bidiLevel = control.baseLevel();
+ } else {
+ analysis->script = script;
+ }
+ lastScript = analysis->script;
+ ++uc;
+ ++analysis;
+ }
+ if (option.flags() & QTextOption::ShowLineAndParagraphSeparators) {
+ (analysis-1)->flags = QScriptAnalysis::LineOrParagraphSeparator; // to exclude it from width
+ }
+
+ Itemizer itemizer(layoutData->string, scriptAnalysis.data(), layoutData->items);
+
+ const QTextDocumentPrivate *p = block.docHandle();
+ if (p) {
+ SpecialData *s = specialData;
+
+ QTextDocumentPrivate::FragmentIterator it = p->find(block.position());
+ QTextDocumentPrivate::FragmentIterator end = p->find(block.position() + block.length() - 1); // -1 to omit the block separator char
+ int format = it.value()->format;
+
+ int prevPosition = 0;
+ int position = prevPosition;
+ while (1) {
+ const QTextFragmentData * const frag = it.value();
+ if (it == end || format != frag->format) {
+ if (s && position >= s->preeditPosition) {
+ position += s->preeditText.length();
+ s = 0;
+ }
+ Q_ASSERT(position <= length);
+ itemizer.generate(prevPosition, position - prevPosition,
+ formats()->charFormat(format).fontCapitalization());
+ if (it == end) {
+ if (position < length)
+ itemizer.generate(position, length - position,
+ formats()->charFormat(format).fontCapitalization());
+ break;
+ }
+ format = frag->format;
+ prevPosition = position;
+ }
+ position += frag->size_array[0];
+ ++it;
+ }
+ } else {
+ itemizer.generate(0, length, static_cast<QFont::Capitalization> (fnt.d->capital));
+ }
+
+ addRequiredBoundaries();
+ resolveAdditionalFormats();
+}
+
+int QTextEngine::findItem(int strPos) const
+{
+ itemize();
+
+ // ##### use binary search
+ int item;
+ for (item = layoutData->items.size()-1; item > 0; --item) {
+ if (layoutData->items[item].position <= strPos)
+ break;
+ }
+ return item;
+}
+
+QFixed QTextEngine::width(int from, int len) const
+{
+ itemize();
+
+ QFixed w = 0;
+
+// qDebug("QTextEngine::width(from = %d, len = %d), numItems=%d, strleng=%d", from, len, items.size(), string.length());
+ for (int i = 0; i < layoutData->items.size(); i++) {
+ const QScriptItem *si = layoutData->items.constData() + i;
+ int pos = si->position;
+ int ilen = length(i);
+// qDebug("item %d: from %d len %d", i, pos, ilen);
+ if (pos >= from + len)
+ break;
+ if (pos + ilen > from) {
+ if (!si->num_glyphs)
+ shape(i);
+
+ if (si->analysis.flags == QScriptAnalysis::Object) {
+ w += si->width;
+ continue;
+ } else if (si->analysis.flags == QScriptAnalysis::Tab) {
+ w += calculateTabWidth(i, w);
+ continue;
+ }
+
+
+ QGlyphLayout glyphs = shapedGlyphs(si);
+ unsigned short *logClusters = this->logClusters(si);
+
+// fprintf(stderr, " logclusters:");
+// for (int k = 0; k < ilen; k++)
+// fprintf(stderr, " %d", logClusters[k]);
+// fprintf(stderr, "\n");
+ // do the simple thing for now and give the first glyph in a cluster the full width, all other ones 0.
+ int charFrom = from - pos;
+ if (charFrom < 0)
+ charFrom = 0;
+ int glyphStart = logClusters[charFrom];
+ if (charFrom > 0 && logClusters[charFrom-1] == glyphStart)
+ while (charFrom < ilen && logClusters[charFrom] == glyphStart)
+ charFrom++;
+ if (charFrom < ilen) {
+ glyphStart = logClusters[charFrom];
+ int charEnd = from + len - 1 - pos;
+ if (charEnd >= ilen)
+ charEnd = ilen-1;
+ int glyphEnd = logClusters[charEnd];
+ while (charEnd < ilen && logClusters[charEnd] == glyphEnd)
+ charEnd++;
+ glyphEnd = (charEnd == ilen) ? si->num_glyphs : logClusters[charEnd];
+
+// qDebug("char: start=%d end=%d / glyph: start = %d, end = %d", charFrom, charEnd, glyphStart, glyphEnd);
+ for (int i = glyphStart; i < glyphEnd; i++)
+ w += glyphs.advances_x[i] * !glyphs.attributes[i].dontPrint;
+ }
+ }
+ }
+// qDebug(" --> w= %d ", w);
+ return w;
+}
+
+glyph_metrics_t QTextEngine::boundingBox(int from, int len) const
+{
+ itemize();
+
+ glyph_metrics_t gm;
+
+ for (int i = 0; i < layoutData->items.size(); i++) {
+ const QScriptItem *si = layoutData->items.constData() + i;
+ QFontEngine *fe = fontEngine(*si);
+
+ int pos = si->position;
+ int ilen = length(i);
+ if (pos > from + len)
+ break;
+ if (pos + ilen > from) {
+ if (!si->num_glyphs)
+ shape(i);
+
+ if (si->analysis.flags == QScriptAnalysis::Object) {
+ gm.width += si->width;
+ continue;
+ } else if (si->analysis.flags == QScriptAnalysis::Tab) {
+ gm.width += calculateTabWidth(i, gm.width);
+ continue;
+ }
+
+ unsigned short *logClusters = this->logClusters(si);
+ QGlyphLayout glyphs = shapedGlyphs(si);
+
+ // do the simple thing for now and give the first glyph in a cluster the full width, all other ones 0.
+ int charFrom = from - pos;
+ if (charFrom < 0)
+ charFrom = 0;
+ int glyphStart = logClusters[charFrom];
+ if (charFrom > 0 && logClusters[charFrom-1] == glyphStart)
+ while (charFrom < ilen && logClusters[charFrom] == glyphStart)
+ charFrom++;
+ if (charFrom < ilen) {
+ glyphStart = logClusters[charFrom];
+ int charEnd = from + len - 1 - pos;
+ if (charEnd >= ilen)
+ charEnd = ilen-1;
+ int glyphEnd = logClusters[charEnd];
+ while (charEnd < ilen && logClusters[charEnd] == glyphEnd)
+ charEnd++;
+ glyphEnd = (charEnd == ilen) ? si->num_glyphs : logClusters[charEnd];
+ if (glyphStart <= glyphEnd ) {
+ glyph_metrics_t m = fe->boundingBox(glyphs.mid(glyphStart, glyphEnd - glyphStart));
+ gm.x = qMin(gm.x, m.x + gm.xoff);
+ gm.y = qMin(gm.y, m.y + gm.yoff);
+ gm.width = qMax(gm.width, m.width+gm.xoff);
+ gm.height = qMax(gm.height, m.height+gm.yoff);
+ gm.xoff += m.xoff;
+ gm.yoff += m.yoff;
+ }
+ }
+
+ glyph_t glyph = glyphs.glyphs[logClusters[pos + ilen - 1]];
+ glyph_metrics_t gi = fe->boundingBox(glyph);
+ if (gi.isValid())
+ gm.width -= qRound(gi.xoff - gi.x - gi.width);
+ }
+ }
+ return gm;
+}
+
+glyph_metrics_t QTextEngine::tightBoundingBox(int from, int len) const
+{
+ itemize();
+
+ glyph_metrics_t gm;
+
+ for (int i = 0; i < layoutData->items.size(); i++) {
+ const QScriptItem *si = layoutData->items.constData() + i;
+ int pos = si->position;
+ int ilen = length(i);
+ if (pos > from + len)
+ break;
+ if (pos + len > from) {
+ if (!si->num_glyphs)
+ shape(i);
+ unsigned short *logClusters = this->logClusters(si);
+ QGlyphLayout glyphs = shapedGlyphs(si);
+
+ // do the simple thing for now and give the first glyph in a cluster the full width, all other ones 0.
+ int charFrom = from - pos;
+ if (charFrom < 0)
+ charFrom = 0;
+ int glyphStart = logClusters[charFrom];
+ if (charFrom > 0 && logClusters[charFrom-1] == glyphStart)
+ while (charFrom < ilen && logClusters[charFrom] == glyphStart)
+ charFrom++;
+ if (charFrom < ilen) {
+ glyphStart = logClusters[charFrom];
+ int charEnd = from + len - 1 - pos;
+ if (charEnd >= ilen)
+ charEnd = ilen-1;
+ int glyphEnd = logClusters[charEnd];
+ while (charEnd < ilen && logClusters[charEnd] == glyphEnd)
+ charEnd++;
+ glyphEnd = (charEnd == ilen) ? si->num_glyphs : logClusters[charEnd];
+ if (glyphStart <= glyphEnd ) {
+ QFontEngine *fe = fontEngine(*si);
+ glyph_metrics_t m = fe->tightBoundingBox(glyphs.mid(glyphStart, glyphEnd - glyphStart));
+ gm.x = qMin(gm.x, m.x + gm.xoff);
+ gm.y = qMin(gm.y, m.y + gm.yoff);
+ gm.width = qMax(gm.width, m.width+gm.xoff);
+ gm.height = qMax(gm.height, m.height+gm.yoff);
+ gm.xoff += m.xoff;
+ gm.yoff += m.yoff;
+ }
+ }
+ }
+ }
+ return gm;
+}
+
+QFont QTextEngine::font(const QScriptItem &si) const
+{
+ QFont font = fnt;
+ if (hasFormats()) {
+ QTextCharFormat f = format(&si);
+ font = f.font();
+
+ if (block.docHandle() && block.docHandle()->layout()) {
+ // Make sure we get the right dpi on printers
+ QPaintDevice *pdev = block.docHandle()->layout()->paintDevice();
+ if (pdev)
+ font = QFont(font, pdev);
+ } else {
+ font = font.resolve(fnt);
+ }
+ QTextCharFormat::VerticalAlignment valign = f.verticalAlignment();
+ if (valign == QTextCharFormat::AlignSuperScript || valign == QTextCharFormat::AlignSubScript) {
+ if (font.pointSize() != -1)
+ font.setPointSize((font.pointSize() * 2) / 3);
+ else
+ font.setPixelSize((font.pixelSize() * 2) / 3);
+ }
+ }
+
+ if (si.analysis.flags == QScriptAnalysis::SmallCaps)
+ font = font.d->smallCapsFont();
+
+ return font;
+}
+
+QFontEngine *QTextEngine::fontEngine(const QScriptItem &si, QFixed *ascent, QFixed *descent) const
+{
+ QFontEngine *engine = 0;
+ QFontEngine *scaledEngine = 0;
+ int script = si.analysis.script;
+
+ QFont font = fnt;
+ if (hasFormats()) {
+ QTextCharFormat f = format(&si);
+ font = f.font();
+
+ if (block.docHandle() && block.docHandle()->layout()) {
+ // Make sure we get the right dpi on printers
+ QPaintDevice *pdev = block.docHandle()->layout()->paintDevice();
+ if (pdev)
+ font = QFont(font, pdev);
+ } else {
+ font = font.resolve(fnt);
+ }
+ engine = font.d->engineForScript(script);
+ QTextCharFormat::VerticalAlignment valign = f.verticalAlignment();
+ if (valign == QTextCharFormat::AlignSuperScript || valign == QTextCharFormat::AlignSubScript) {
+ if (font.pointSize() != -1)
+ font.setPointSize((font.pointSize() * 2) / 3);
+ else
+ font.setPixelSize((font.pixelSize() * 2) / 3);
+ scaledEngine = font.d->engineForScript(script);
+ }
+ } else {
+ engine = font.d->engineForScript(script);
+ }
+
+ if (si.analysis.flags == QScriptAnalysis::SmallCaps) {
+ QFontPrivate *p = font.d->smallCapsFontPrivate();
+ scaledEngine = p->engineForScript(script);
+ }
+
+ if (ascent) {
+ *ascent = engine->ascent();
+ *descent = engine->descent();
+ }
+
+ if (scaledEngine)
+ return scaledEngine;
+ return engine;
+}
+
+struct QJustificationPoint {
+ int type;
+ QFixed kashidaWidth;
+ QGlyphLayout glyph;
+ QFontEngine *fontEngine;
+};
+
+Q_DECLARE_TYPEINFO(QJustificationPoint, Q_PRIMITIVE_TYPE);
+
+static void set(QJustificationPoint *point, int type, const QGlyphLayout &glyph, QFontEngine *fe)
+{
+ point->type = type;
+ point->glyph = glyph;
+ point->fontEngine = fe;
+
+ if (type >= HB_Arabic_Normal) {
+ QChar ch(0x640); // Kashida character
+ QGlyphLayoutArray<8> glyphs;
+ int nglyphs = 7;
+ fe->stringToCMap(&ch, 1, &glyphs, &nglyphs, 0);
+ if (glyphs.glyphs[0] && glyphs.advances_x[0] != 0) {
+ point->kashidaWidth = glyphs.advances_x[0];
+ } else {
+ point->type = HB_NoJustification;
+ point->kashidaWidth = 0;
+ }
+ }
+}
+
+
+void QTextEngine::justify(const QScriptLine &line)
+{
+// qDebug("justify: line.gridfitted = %d, line.justified=%d", line.gridfitted, line.justified);
+ if (line.gridfitted && line.justified)
+ return;
+
+ if (!line.gridfitted) {
+ // redo layout in device metrics, then adjust
+ const_cast<QScriptLine &>(line).gridfitted = true;
+ }
+
+ if ((option.alignment() & Qt::AlignHorizontal_Mask) != Qt::AlignJustify)
+ return;
+
+ itemize();
+
+ if (!forceJustification) {
+ int end = line.from + (int)line.length;
+ if (end == layoutData->string.length())
+ return; // no justification at end of paragraph
+ if (end && layoutData->items[findItem(end-1)].analysis.flags == QScriptAnalysis::LineOrParagraphSeparator)
+ return; // no justification at the end of an explicitely separated line
+ }
+
+ // justify line
+ int maxJustify = 0;
+
+ // don't include trailing white spaces when doing justification
+ int line_length = line.length;
+ const HB_CharAttributes *a = attributes()+line.from;
+ while (line_length && a[line_length-1].whiteSpace)
+ --line_length;
+ // subtract one char more, as we can't justfy after the last character
+ --line_length;
+
+ if (!line_length)
+ return;
+
+ int firstItem = findItem(line.from);
+ int nItems = findItem(line.from + line_length - 1) - firstItem + 1;
+
+ QVarLengthArray<QJustificationPoint> justificationPoints;
+ int nPoints = 0;
+// qDebug("justifying from %d len %d, firstItem=%d, nItems=%d (%s)", line.from, line_length, firstItem, nItems, layoutData->string.mid(line.from, line_length).toUtf8().constData());
+ QFixed minKashida = 0x100000;
+
+ // we need to do all shaping before we go into the next loop, as we there
+ // store pointers to the glyph data that could get reallocated by the shaping
+ // process.
+ for (int i = 0; i < nItems; ++i) {
+ QScriptItem &si = layoutData->items[firstItem + i];
+ if (!si.num_glyphs)
+ shape(firstItem + i);
+ }
+
+ for (int i = 0; i < nItems; ++i) {
+ QScriptItem &si = layoutData->items[firstItem + i];
+
+ int kashida_type = HB_Arabic_Normal;
+ int kashida_pos = -1;
+
+ int start = qMax(line.from - si.position, 0);
+ int end = qMin(line.from + line_length - (int)si.position, length(firstItem+i));
+
+ unsigned short *log_clusters = logClusters(&si);
+
+ int gs = log_clusters[start];
+ int ge = (end == length(firstItem+i) ? si.num_glyphs : log_clusters[end]);
+
+ const QGlyphLayout g = shapedGlyphs(&si);
+
+ for (int i = gs; i < ge; ++i) {
+ g.justifications[i].type = QGlyphJustification::JustifyNone;
+ g.justifications[i].nKashidas = 0;
+ g.justifications[i].space_18d6 = 0;
+
+ justificationPoints.resize(nPoints+3);
+ int justification = g.attributes[i].justification;
+
+ switch(justification) {
+ case HB_NoJustification:
+ break;
+ case HB_Space :
+ // fall through
+ case HB_Arabic_Space :
+ if (kashida_pos >= 0) {
+// qDebug("kashida position at %d in word", kashida_pos);
+ set(&justificationPoints[nPoints], kashida_type, g.mid(kashida_pos), fontEngine(si));
+ minKashida = qMin(minKashida, justificationPoints[nPoints].kashidaWidth);
+ maxJustify = qMax(maxJustify, justificationPoints[nPoints].type);
+ ++nPoints;
+ }
+ kashida_pos = -1;
+ kashida_type = HB_Arabic_Normal;
+ // fall through
+ case HB_Character :
+ set(&justificationPoints[nPoints++], justification, g.mid(i), fontEngine(si));
+ maxJustify = qMax(maxJustify, justification);
+ break;
+ case HB_Arabic_Normal :
+ case HB_Arabic_Waw :
+ case HB_Arabic_BaRa :
+ case HB_Arabic_Alef :
+ case HB_Arabic_HaaDal :
+ case HB_Arabic_Seen :
+ case HB_Arabic_Kashida :
+ if (justification >= kashida_type) {
+ kashida_pos = i;
+ kashida_type = justification;
+ }
+ }
+ }
+ if (kashida_pos >= 0) {
+ set(&justificationPoints[nPoints], kashida_type, g.mid(kashida_pos), fontEngine(si));
+ minKashida = qMin(minKashida, justificationPoints[nPoints].kashidaWidth);
+ maxJustify = qMax(maxJustify, justificationPoints[nPoints].type);
+ ++nPoints;
+ }
+ }
+
+ QFixed need = line.width - line.textWidth;
+ if (need < 0) {
+ // line overflows already!
+ const_cast<QScriptLine &>(line).justified = true;
+ return;
+ }
+
+// qDebug("doing justification: textWidth=%x, requested=%x, maxJustify=%d", line.textWidth.value(), line.width.value(), maxJustify);
+// qDebug(" minKashida=%f, need=%f", minKashida.toReal(), need.toReal());
+
+ // distribute in priority order
+ if (maxJustify >= HB_Arabic_Normal) {
+ while (need >= minKashida) {
+ for (int type = maxJustify; need >= minKashida && type >= HB_Arabic_Normal; --type) {
+ for (int i = 0; need >= minKashida && i < nPoints; ++i) {
+ if (justificationPoints[i].type == type && justificationPoints[i].kashidaWidth <= need) {
+ justificationPoints[i].glyph.justifications->nKashidas++;
+ // ############
+ justificationPoints[i].glyph.justifications->space_18d6 += justificationPoints[i].kashidaWidth.value();
+ need -= justificationPoints[i].kashidaWidth;
+// qDebug("adding kashida type %d with width %x, neednow %x", type, justificationPoints[i].kashidaWidth, need.value());
+ }
+ }
+ }
+ }
+ }
+ Q_ASSERT(need >= 0);
+ if (!need)
+ goto end;
+
+ maxJustify = qMin(maxJustify, (int)HB_Space);
+ for (int type = maxJustify; need != 0 && type > 0; --type) {
+ int n = 0;
+ for (int i = 0; i < nPoints; ++i) {
+ if (justificationPoints[i].type == type)
+ ++n;
+ }
+// qDebug("number of points for justification type %d: %d", type, n);
+
+
+ if (!n)
+ continue;
+
+ for (int i = 0; i < nPoints; ++i) {
+ if (justificationPoints[i].type == type) {
+ QFixed add = need/n;
+// qDebug("adding %x to glyph %x", add.value(), justificationPoints[i].glyph->glyph);
+ justificationPoints[i].glyph.justifications[0].space_18d6 = add.value();
+ need -= add;
+ --n;
+ }
+ }
+
+ Q_ASSERT(!need);
+ }
+ end:
+ const_cast<QScriptLine &>(line).justified = true;
+}
+
+void QScriptLine::setDefaultHeight(QTextEngine *eng)
+{
+ QFont f;
+ QFontEngine *e;
+
+ if (eng->block.docHandle() && eng->block.docHandle()->layout()) {
+ f = eng->block.charFormat().font();
+ // Make sure we get the right dpi on printers
+ QPaintDevice *pdev = eng->block.docHandle()->layout()->paintDevice();
+ if (pdev)
+ f = QFont(f, pdev);
+ e = f.d->engineForScript(QUnicodeTables::Common);
+ } else {
+ e = eng->fnt.d->engineForScript(QUnicodeTables::Common);
+ }
+
+ ascent = qMax(ascent, e->ascent());
+ descent = qMax(descent, e->descent());
+}
+
+QTextEngine::LayoutData::LayoutData()
+{
+ memory = 0;
+ allocated = 0;
+ memory_on_stack = false;
+ used = 0;
+ hasBidi = false;
+ inLayout = false;
+ haveCharAttributes = false;
+ logClustersPtr = 0;
+ available_glyphs = 0;
+}
+
+QTextEngine::LayoutData::LayoutData(const QString &str, void **stack_memory, int _allocated)
+ : string(str)
+{
+ allocated = _allocated;
+
+ int space_charAttributes = sizeof(HB_CharAttributes)*string.length()/sizeof(void*) + 1;
+ int space_logClusters = sizeof(unsigned short)*string.length()/sizeof(void*) + 1;
+ available_glyphs = ((int)allocated - space_charAttributes - space_logClusters)*(int)sizeof(void*)/(int)QGlyphLayout::spaceNeededForGlyphLayout(1);
+
+ if (available_glyphs < str.length()) {
+ // need to allocate on the heap
+ allocated = 0;
+
+ memory_on_stack = false;
+ memory = 0;
+ logClustersPtr = 0;
+ } else {
+ memory_on_stack = true;
+ memory = stack_memory;
+ logClustersPtr = (unsigned short *)(memory + space_charAttributes);
+
+ void *m = memory + space_charAttributes + space_logClusters;
+ glyphLayout = QGlyphLayout(reinterpret_cast<char *>(m), str.length());
+ glyphLayout.clear();
+ memset(memory, 0, space_charAttributes*sizeof(void *));
+ }
+ used = 0;
+ hasBidi = false;
+ inLayout = false;
+ haveCharAttributes = false;
+}
+
+QTextEngine::LayoutData::~LayoutData()
+{
+ if (!memory_on_stack)
+ free(memory);
+ memory = 0;
+}
+
+void QTextEngine::LayoutData::reallocate(int totalGlyphs)
+{
+ Q_ASSERT(totalGlyphs >= glyphLayout.numGlyphs);
+ if (memory_on_stack && available_glyphs >= totalGlyphs) {
+ glyphLayout.grow(glyphLayout.data(), totalGlyphs);
+ return;
+ }
+
+ int space_charAttributes = sizeof(HB_CharAttributes)*string.length()/sizeof(void*) + 1;
+ int space_logClusters = sizeof(unsigned short)*string.length()/sizeof(void*) + 1;
+ int space_glyphs = QGlyphLayout::spaceNeededForGlyphLayout(totalGlyphs)/sizeof(void*) + 2;
+
+ int newAllocated = space_charAttributes + space_glyphs + space_logClusters;
+ Q_ASSERT(newAllocated >= allocated);
+ void **newMem = memory;
+ newMem = (void **)::realloc(memory_on_stack ? 0 : memory, newAllocated*sizeof(void *));
+ Q_CHECK_PTR(newMem);
+ if (memory_on_stack && newMem)
+ memcpy(newMem, memory, allocated*sizeof(void *));
+ memory = newMem;
+ memory_on_stack = false;
+
+ void **m = memory;
+ m += space_charAttributes;
+ logClustersPtr = (unsigned short *) m;
+ m += space_logClusters;
+
+ const int space_preGlyphLayout = space_charAttributes + space_logClusters;
+ if (allocated < space_preGlyphLayout)
+ memset(memory + allocated, 0, (space_preGlyphLayout - allocated)*sizeof(void *));
+
+ glyphLayout.grow(reinterpret_cast<char *>(m), totalGlyphs);
+
+ allocated = newAllocated;
+}
+
+// grow to the new size, copying the existing data to the new layout
+void QGlyphLayout::grow(char *address, int totalGlyphs)
+{
+ QGlyphLayout oldLayout(address, numGlyphs);
+ QGlyphLayout newLayout(address, totalGlyphs);
+
+ if (numGlyphs) {
+ // move the existing data
+ memmove(newLayout.attributes, oldLayout.attributes, numGlyphs * sizeof(HB_GlyphAttributes));
+ memmove(newLayout.justifications, oldLayout.justifications, numGlyphs * sizeof(QGlyphJustification));
+ memmove(newLayout.advances_y, oldLayout.advances_y, numGlyphs * sizeof(QFixed));
+ memmove(newLayout.advances_x, oldLayout.advances_x, numGlyphs * sizeof(QFixed));
+ memmove(newLayout.glyphs, oldLayout.glyphs, numGlyphs * sizeof(HB_Glyph));
+ }
+
+ // clear the new data
+ newLayout.clear(numGlyphs);
+
+ *this = newLayout;
+}
+
+void QTextEngine::freeMemory()
+{
+ if (!stackEngine) {
+ delete layoutData;
+ layoutData = 0;
+ } else {
+ layoutData->used = 0;
+ layoutData->hasBidi = false;
+ layoutData->inLayout = false;
+ layoutData->haveCharAttributes = false;
+ }
+ for (int i = 0; i < lines.size(); ++i) {
+ lines[i].justified = 0;
+ lines[i].gridfitted = 0;
+ }
+}
+
+int QTextEngine::formatIndex(const QScriptItem *si) const
+{
+ if (specialData && !specialData->resolvedFormatIndices.isEmpty())
+ return specialData->resolvedFormatIndices.at(si - &layoutData->items[0]);
+ QTextDocumentPrivate *p = block.docHandle();
+ if (!p)
+ return -1;
+ int pos = si->position;
+ if (specialData && si->position >= specialData->preeditPosition) {
+ if (si->position < specialData->preeditPosition + specialData->preeditText.length())
+ pos = qMax(specialData->preeditPosition - 1, 0);
+ else
+ pos -= specialData->preeditText.length();
+ }
+ QTextDocumentPrivate::FragmentIterator it = p->find(block.position() + pos);
+ return it.value()->format;
+}
+
+
+QTextCharFormat QTextEngine::format(const QScriptItem *si) const
+{
+ QTextCharFormat format;
+ const QTextFormatCollection *formats = 0;
+ if (block.docHandle()) {
+ formats = this->formats();
+ format = formats->charFormat(formatIndex(si));
+ }
+ if (specialData && specialData->resolvedFormatIndices.isEmpty()) {
+ int end = si->position + length(si);
+ for (int i = 0; i < specialData->addFormats.size(); ++i) {
+ const QTextLayout::FormatRange &r = specialData->addFormats.at(i);
+ if (r.start <= si->position && r.start + r.length >= end) {
+ if (!specialData->addFormatIndices.isEmpty())
+ format.merge(formats->format(specialData->addFormatIndices.at(i)));
+ else
+ format.merge(r.format);
+ }
+ }
+ }
+ return format;
+}
+
+void QTextEngine::addRequiredBoundaries() const
+{
+ if (specialData) {
+ for (int i = 0; i < specialData->addFormats.size(); ++i) {
+ const QTextLayout::FormatRange &r = specialData->addFormats.at(i);
+ setBoundary(r.start);
+ setBoundary(r.start + r.length);
+ //qDebug("adding boundaries %d %d", r.start, r.start+r.length);
+ }
+ }
+}
+
+bool QTextEngine::atWordSeparator(int position) const
+{
+ const QChar c = layoutData->string.at(position);
+ switch (c.toLatin1()) {
+ case '.':
+ case ',':
+ case '?':
+ case '!':
+ case ':':
+ case ';':
+ case '-':
+ case '<':
+ case '>':
+ case '[':
+ case ']':
+ case '(':
+ case ')':
+ case '{':
+ case '}':
+ case '=':
+ case '/':
+ case '+':
+ case '%':
+ case '&':
+ case '^':
+ case '*':
+ case '\'':
+ case '"':
+ case '~':
+ case '|':
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool QTextEngine::atSpace(int position) const
+{
+ const QChar c = layoutData->string.at(position);
+
+ return c == QLatin1Char(' ')
+ || c == QChar::Nbsp
+ || c == QChar::LineSeparator
+ || c == QLatin1Char('\t')
+ ;
+}
+
+
+void QTextEngine::indexAdditionalFormats()
+{
+ if (!block.docHandle())
+ return;
+
+ specialData->addFormatIndices.resize(specialData->addFormats.count());
+ QTextFormatCollection * const formats = this->formats();
+
+ for (int i = 0; i < specialData->addFormats.count(); ++i) {
+ specialData->addFormatIndices[i] = formats->indexForFormat(specialData->addFormats.at(i).format);
+ specialData->addFormats[i].format = QTextCharFormat();
+ }
+}
+
+/* These two helper functions are used to determine whether we need to insert a ZWJ character
+ between the text that gets truncated and the ellipsis. This is important to get
+ correctly shaped results for arabic text.
+*/
+static bool nextCharJoins(const QString &string, int pos)
+{
+ while (pos < string.length() && string.at(pos).category() == QChar::Mark_NonSpacing)
+ ++pos;
+ if (pos == string.length())
+ return false;
+ return string.at(pos).joining() != QChar::OtherJoining;
+}
+
+static bool prevCharJoins(const QString &string, int pos)
+{
+ while (pos > 0 && string.at(pos - 1).category() == QChar::Mark_NonSpacing)
+ --pos;
+ if (pos == 0)
+ return false;
+ return (string.at(pos - 1).joining() == QChar::Dual || string.at(pos - 1).joining() == QChar::Center);
+}
+
+QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int flags) const
+{
+// qDebug() << "elidedText; available width" << width.toReal() << "text width:" << this->width(0, layoutData->string.length()).toReal();
+
+ if (flags & Qt::TextShowMnemonic) {
+ itemize();
+ for (int i = 0; i < layoutData->items.size(); ++i) {
+ QScriptItem &si = layoutData->items[i];
+ if (!si.num_glyphs)
+ shape(i);
+
+ HB_CharAttributes *attributes = const_cast<HB_CharAttributes *>(this->attributes());
+ unsigned short *logClusters = this->logClusters(&si);
+ QGlyphLayout glyphs = shapedGlyphs(&si);
+
+ const int end = si.position + length(&si);
+ for (int i = si.position; i < end - 1; ++i)
+ if (layoutData->string.at(i) == QLatin1Char('&')) {
+ const int gp = logClusters[i - si.position];
+ glyphs.attributes[gp].dontPrint = true;
+ attributes[i + 1].charStop = false;
+ attributes[i + 1].whiteSpace = false;
+ attributes[i + 1].lineBreakType = HB_NoBreak;
+ if (i < end - 1
+ && layoutData->string.at(i + 1) == QLatin1Char('&'))
+ ++i;
+ }
+ }
+ }
+
+ validate();
+
+ if (mode == Qt::ElideNone
+ || this->width(0, layoutData->string.length()) <= width
+ || layoutData->string.length() <= 1)
+ return layoutData->string;
+
+ QFixed ellipsisWidth;
+ QString ellipsisText;
+ {
+ QChar ellipsisChar(0x2026);
+
+ QFontEngine *fe = fnt.d->engineForScript(QUnicodeTables::Common);
+
+ QGlyphLayoutArray<1> ellipsisGlyph;
+ {
+ QFontEngine *feForEllipsis = (fe->type() == QFontEngine::Multi)
+ ? static_cast<QFontEngineMulti *>(fe)->engine(0)
+ : fe;
+
+ if (feForEllipsis->type() == QFontEngine::Mac)
+ feForEllipsis = fe;
+
+ // the lookup can be really slow when we use XLFD fonts
+ if (feForEllipsis->type() != QFontEngine::XLFD
+ && feForEllipsis->canRender(&ellipsisChar, 1)) {
+ int nGlyphs = 1;
+ feForEllipsis->stringToCMap(&ellipsisChar, 1, &ellipsisGlyph, &nGlyphs, 0);
+ }
+ }
+
+ if (ellipsisGlyph.glyphs[0]) {
+ ellipsisWidth = ellipsisGlyph.advances_x[0];
+ ellipsisText = ellipsisChar;
+ } else {
+ QString dotDotDot(QLatin1String("..."));
+
+ QGlyphLayoutArray<3> glyphs;
+ int nGlyphs = 3;
+ if (!fe->stringToCMap(dotDotDot.constData(), 3, &glyphs, &nGlyphs, 0))
+ // should never happen...
+ return layoutData->string;
+ for (int i = 0; i < nGlyphs; ++i)
+ ellipsisWidth += glyphs.advances_x[i];
+ ellipsisText = dotDotDot;
+ }
+ }
+
+ const QFixed availableWidth = width - ellipsisWidth;
+ if (availableWidth < 0)
+ return QString();
+
+ const HB_CharAttributes *attributes = this->attributes();
+
+ if (mode == Qt::ElideRight) {
+ QFixed currentWidth;
+ int pos = 0;
+ int nextBreak = 0;
+
+ do {
+ pos = nextBreak;
+
+ ++nextBreak;
+ while (nextBreak < layoutData->string.length() && !attributes[nextBreak].charStop)
+ ++nextBreak;
+
+ currentWidth += this->width(pos, nextBreak - pos);
+ } while (nextBreak < layoutData->string.length()
+ && currentWidth < availableWidth);
+
+ if (nextCharJoins(layoutData->string, pos))
+ ellipsisText.prepend(QChar(0x200d) /* ZWJ */);
+
+ return layoutData->string.left(pos) + ellipsisText;
+ } else if (mode == Qt::ElideLeft) {
+ QFixed currentWidth;
+ int pos = layoutData->string.length();
+ int nextBreak = layoutData->string.length();
+
+ do {
+ pos = nextBreak;
+
+ --nextBreak;
+ while (nextBreak > 0 && !attributes[nextBreak].charStop)
+ --nextBreak;
+
+ currentWidth += this->width(nextBreak, pos - nextBreak);
+ } while (nextBreak > 0
+ && currentWidth < availableWidth);
+
+ if (prevCharJoins(layoutData->string, pos))
+ ellipsisText.append(QChar(0x200d) /* ZWJ */);
+
+ return ellipsisText + layoutData->string.mid(pos);
+ } else if (mode == Qt::ElideMiddle) {
+ QFixed leftWidth;
+ QFixed rightWidth;
+
+ int leftPos = 0;
+ int nextLeftBreak = 0;
+
+ int rightPos = layoutData->string.length();
+ int nextRightBreak = layoutData->string.length();
+
+ do {
+ leftPos = nextLeftBreak;
+ rightPos = nextRightBreak;
+
+ ++nextLeftBreak;
+ while (nextLeftBreak < layoutData->string.length() && !attributes[nextLeftBreak].charStop)
+ ++nextLeftBreak;
+
+ --nextRightBreak;
+ while (nextRightBreak > 0 && !attributes[nextRightBreak].charStop)
+ --nextRightBreak;
+
+ leftWidth += this->width(leftPos, nextLeftBreak - leftPos);
+ rightWidth += this->width(nextRightBreak, rightPos - nextRightBreak);
+ } while (nextLeftBreak < layoutData->string.length()
+ && nextRightBreak > 0
+ && leftWidth + rightWidth < availableWidth);
+
+ if (nextCharJoins(layoutData->string, leftPos))
+ ellipsisText.prepend(QChar(0x200d) /* ZWJ */);
+ if (prevCharJoins(layoutData->string, rightPos))
+ ellipsisText.append(QChar(0x200d) /* ZWJ */);
+
+ return layoutData->string.left(leftPos) + ellipsisText + layoutData->string.mid(rightPos);
+ }
+
+ return layoutData->string;
+}
+
+void QTextEngine::setBoundary(int strPos) const
+{
+ if (strPos <= 0 || strPos >= layoutData->string.length())
+ return;
+
+ int itemToSplit = 0;
+ while (itemToSplit < layoutData->items.size() && layoutData->items[itemToSplit].position <= strPos)
+ itemToSplit++;
+ itemToSplit--;
+ if (layoutData->items[itemToSplit].position == strPos) {
+ // already a split at the requested position
+ return;
+ }
+ splitItem(itemToSplit, strPos - layoutData->items[itemToSplit].position);
+}
+
+void QTextEngine::splitItem(int item, int pos) const
+{
+ if (pos <= 0)
+ return;
+
+ layoutData->items.insert(item + 1, QScriptItem(layoutData->items[item]));
+ QScriptItem &oldItem = layoutData->items[item];
+ QScriptItem &newItem = layoutData->items[item+1];
+ newItem.position += pos;
+
+ if (oldItem.num_glyphs) {
+ // already shaped, break glyphs aswell
+ int breakGlyph = logClusters(&oldItem)[pos];
+
+ newItem.num_glyphs = oldItem.num_glyphs - breakGlyph;
+ oldItem.num_glyphs = breakGlyph;
+ newItem.glyph_data_offset = oldItem.glyph_data_offset + breakGlyph;
+
+ for (int i = 0; i < newItem.num_glyphs; i++)
+ logClusters(&newItem)[i] -= breakGlyph;
+
+ QFixed w = 0;
+ const QGlyphLayout g = shapedGlyphs(&oldItem);
+ for(int j = 0; j < breakGlyph; ++j)
+ w += g.advances_x[j];
+
+ newItem.width = oldItem.width - w;
+ oldItem.width = w;
+ }
+
+// qDebug("split at position %d itempos=%d", pos, item);
+}
+
+extern int qt_defaultDpiY();
+
+QFixed QTextEngine::calculateTabWidth(int item, QFixed x) const
+{
+ const QScriptItem &si = layoutData->items[item];
+
+ QFixed dpiScale = 1;
+ if (block.docHandle() && block.docHandle()->layout()) {
+ QPaintDevice *pdev = block.docHandle()->layout()->paintDevice();
+ if (pdev)
+ dpiScale = QFixed::fromReal(pdev->logicalDpiY() / qreal(qt_defaultDpiY()));
+ } else {
+ dpiScale = QFixed::fromReal(fnt.d->dpi / qreal(qt_defaultDpiY()));
+ }
+
+ QList<QTextOption::Tab> tabArray = option.tabs();
+ if (!tabArray.isEmpty()) {
+ if (option.textDirection() == Qt::RightToLeft) { // rebase the tabArray positions.
+ QList<QTextOption::Tab> newTabs;
+ QList<QTextOption::Tab>::Iterator iter = tabArray.begin();
+ while(iter != tabArray.end()) {
+ QTextOption::Tab tab = *iter;
+ if (tab.type == QTextOption::LeftTab)
+ tab.type = QTextOption::RightTab;
+ else if (tab.type == QTextOption::RightTab)
+ tab.type = QTextOption::LeftTab;
+ newTabs << tab;
+ ++iter;
+ }
+ tabArray = newTabs;
+ }
+ for (int i = 0; i < tabArray.size(); ++i) {
+ QFixed tab = QFixed::fromReal(tabArray[i].position) * dpiScale;
+ if (tab > x) { // this is the tab we need.
+ QTextOption::Tab tabSpec = tabArray[i];
+ int tabSectionEnd = layoutData->string.count();
+ if (tabSpec.type == QTextOption::RightTab || tabSpec.type == QTextOption::CenterTab) {
+ // find next tab to calculate the width required.
+ tab = QFixed::fromReal(tabSpec.position);
+ for (int i=item + 1; i < layoutData->items.count(); i++) {
+ const QScriptItem &item = layoutData->items[i];
+ if (item.analysis.flags == QScriptAnalysis::TabOrObject) { // found it.
+ tabSectionEnd = item.position;
+ break;
+ }
+ }
+ }
+ else if (tabSpec.type == QTextOption::DelimiterTab)
+ // find delimitor character to calculate the width required
+ tabSectionEnd = qMax(si.position, layoutData->string.indexOf(tabSpec.delimiter, si.position) + 1);
+
+ if (tabSectionEnd > si.position) {
+ QFixed length;
+ // Calculate the length of text between this tab and the tabSectionEnd
+ for (int i=item; i < layoutData->items.count(); i++) {
+ QScriptItem &item = layoutData->items[i];
+ if (item.position > tabSectionEnd || item.position <= si.position)
+ continue;
+ shape(i); // first, lets make sure relevant text is already shaped
+ QGlyphLayout glyphs = this->shapedGlyphs(&item);
+ const int end = qMin(item.position + item.num_glyphs, tabSectionEnd) - item.position;
+ for (int i=0; i < end; i++)
+ length += glyphs.advances_x[i] * !glyphs.attributes[i].dontPrint;
+ if (end + item.position == tabSectionEnd && tabSpec.type == QTextOption::DelimiterTab) // remove half of matching char
+ length -= glyphs.advances_x[end] / 2 * !glyphs.attributes[end].dontPrint;
+ }
+
+ switch (tabSpec.type) {
+ case QTextOption::CenterTab:
+ length /= 2;
+ // fall through
+ case QTextOption::DelimiterTab:
+ // fall through
+ case QTextOption::RightTab:
+ tab = QFixed::fromReal(tabSpec.position) * dpiScale - length;
+ if (tab < 0) // default to tab taking no space
+ return QFixed();
+ break;
+ case QTextOption::LeftTab:
+ break;
+ }
+ }
+ return tab - x;
+ }
+ }
+ }
+ QFixed tab = QFixed::fromReal(option.tabStop());
+ if (tab <= 0)
+ tab = 80; // default
+ tab *= dpiScale;
+ QFixed nextTabPos = ((x / tab).truncate() + 1) * tab;
+ QFixed tabWidth = nextTabPos - x;
+
+ return tabWidth;
+}
+
+void QTextEngine::resolveAdditionalFormats() const
+{
+ if (!specialData || specialData->addFormats.isEmpty()
+ || !block.docHandle()
+ || !specialData->resolvedFormatIndices.isEmpty())
+ return;
+
+ QTextFormatCollection *collection = this->formats();
+
+ specialData->resolvedFormatIndices.clear();
+ QVector<int> indices(layoutData->items.count());
+ for (int i = 0; i < layoutData->items.count(); ++i) {
+ QTextCharFormat f = format(&layoutData->items.at(i));
+ indices[i] = collection->indexForFormat(f);
+ }
+ specialData->resolvedFormatIndices = indices;
+}
+
+QStackTextEngine::QStackTextEngine(const QString &string, const QFont &f)
+ : _layoutData(string, _memory, MemSize)
+{
+ fnt = f;
+ text = string;
+ stackEngine = true;
+ layoutData = &_layoutData;
+}
+
+QTextItemInt::QTextItemInt(const QScriptItem &si, QFont *font, const QTextCharFormat &format)
+ : justified(false), underlineStyle(QTextCharFormat::NoUnderline), charFormat(format),
+ num_chars(0), chars(0), logClusters(0), f(0), fontEngine(0)
+{
+ // explicitly initialize flags so that initFontAttributes can be called
+ // multiple times on the same TextItem
+ flags = 0;
+ if (si.analysis.bidiLevel %2)
+ flags |= QTextItem::RightToLeft;
+ ascent = si.ascent;
+ descent = si.descent;
+ f = font;
+ fontEngine = f->d->engineForScript(si.analysis.script);
+ Q_ASSERT(fontEngine);
+
+ if (format.hasProperty(QTextFormat::TextUnderlineStyle)) {
+ underlineStyle = format.underlineStyle();
+ } else if (format.boolProperty(QTextFormat::FontUnderline)
+ || f->d->underline) {
+ underlineStyle = QTextCharFormat::SingleUnderline;
+ }
+
+ // compat
+ if (underlineStyle == QTextCharFormat::SingleUnderline)
+ flags |= QTextItem::Underline;
+
+ if (f->d->overline || format.fontOverline())
+ flags |= QTextItem::Overline;
+ if (f->d->strikeOut || format.fontStrikeOut())
+ flags |= QTextItem::StrikeOut;
+}
+
+QTextItemInt QTextItemInt::midItem(QFontEngine *fontEngine, int firstGlyphIndex, int numGlyphs) const
+{
+ QTextItemInt ti = *this;
+ const int end = firstGlyphIndex + numGlyphs;
+ ti.glyphs = glyphs.mid(firstGlyphIndex, numGlyphs);
+ ti.fontEngine = fontEngine;
+
+ if (logClusters && chars) {
+ const int logClusterOffset = logClusters[0];
+ while (logClusters[ti.chars - chars] - logClusterOffset < firstGlyphIndex)
+ ++ti.chars;
+
+ ti.logClusters += (ti.chars - chars);
+
+ ti.num_chars = 0;
+ int char_start = ti.chars - chars;
+ while (char_start + ti.num_chars < num_chars && ti.logClusters[ti.num_chars] - logClusterOffset < end)
+ ++ti.num_chars;
+ }
+ return ti;
+}
+
+
+QTransform qt_true_matrix(qreal w, qreal h, QTransform x)
+{
+ QRectF rect = x.mapRect(QRectF(0, 0, w, h));
+ return x * QTransform::fromTranslate(-rect.x(), -rect.y());
+}
+
+
+glyph_metrics_t glyph_metrics_t::transformed(const QTransform &matrix) const
+{
+ if (matrix.type() < QTransform::TxTranslate)
+ return *this;
+
+ glyph_metrics_t m = *this;
+
+ qreal w = width.toReal();
+ qreal h = height.toReal();
+ QTransform xform = qt_true_matrix(w, h, matrix);
+
+ QRectF rect(0, 0, w, h);
+ rect = xform.mapRect(rect);
+ m.width = QFixed::fromReal(rect.width());
+ m.height = QFixed::fromReal(rect.height());
+
+ QLineF l = xform.map(QLineF(x.toReal(), y.toReal(), xoff.toReal(), yoff.toReal()));
+
+ m.x = QFixed::fromReal(l.x1());
+ m.y = QFixed::fromReal(l.y1());
+
+ // The offset is relative to the baseline which is why we use dx/dy of the line
+ m.xoff = QFixed::fromReal(l.dx());
+ m.yoff = QFixed::fromReal(l.dy());
+
+ return m;
+}
+
+
+QT_END_NAMESPACE