Long live Qt for S60!

1 files changed, 1161 insertions, 0 deletions

diff --git a/src/gui/text/qfontengine_qpf.cpp b/src/gui/text/qfontengine_qpf.cpp
new file mode 100644
index 0000000..e9fcac4
--- /dev/null
+++ b/src/gui/text/qfontengine_qpf.cpp
@@ -0,0 +1,1161 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfontengine_qpf_p.h"
+
+#include "private/qpaintengine_raster_p.h"
+#include <QtCore/qlibraryinfo.h>
+#include <QtCore/qfileinfo.h>
+
+#include <QtCore/qfile.h>
+#include <QtCore/qdir.h>
+#include <QtCore/qbuffer.h>
+#if !defined(QT_NO_FREETYPE)
+#include "private/qfontengine_ft_p.h"
+#endif
+
+// for mmap
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <errno.h>
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_QWS_QPF2
+
+QT_BEGIN_INCLUDE_NAMESPACE
+#include "qpfutil.cpp"
+
+#if defined(Q_WS_QWS)
+#   include "private/qwscommand_qws_p.h"
+#   include "qwsdisplay_qws.h"
+#   include "qabstractfontengine_p.h"
+#endif
+#include "qplatformdefs.h"
+QT_END_INCLUDE_NAMESPACE
+
+//#define DEBUG_HEADER
+//#define DEBUG_FONTENGINE
+
+#if defined(DEBUG_HEADER)
+# define DEBUG_VERIFY qDebug
+#else
+# define DEBUG_VERIFY if (0) qDebug
+#endif
+
+#define READ_VERIFY(type, variable) \
+    if (tagPtr + sizeof(type) > endPtr) { \
+        DEBUG_VERIFY() << "read verify failed in line" << __LINE__; \
+        return 0; \
+    } \
+    variable = qFromBigEndian<type>(tagPtr); \
+    DEBUG_VERIFY() << "read value" << variable << "of type " #type; \
+    tagPtr += sizeof(type)
+
+template <typename T>
+T readValue(const uchar *&data)
+{
+    T value = qFromBigEndian<T>(data);
+    data += sizeof(T);
+    return value;
+}
+
+#define VERIFY(condition) \
+    if (!(condition)) { \
+        DEBUG_VERIFY() << "condition " #condition " failed in line" << __LINE__; \
+        return 0; \
+    }
+
+#define VERIFY_TAG(condition) \
+    if (!(condition)) { \
+        DEBUG_VERIFY() << "verifying tag condition " #condition " failed in line" << __LINE__ << "with tag" << tag; \
+        return 0; \
+    }
+
+static inline const uchar *verifyTag(const uchar *tagPtr, const uchar *endPtr)
+{
+    quint16 tag, length;
+    READ_VERIFY(quint16, tag);
+    READ_VERIFY(quint16, length);
+    if (tag == QFontEngineQPF::Tag_EndOfHeader)
+        return endPtr;
+    if (tag < QFontEngineQPF::NumTags) {
+        switch (tagTypes[tag]) {
+            case QFontEngineQPF::BitFieldType:
+            case QFontEngineQPF::StringType:
+                // can't do anything...
+                break;
+            case QFontEngineQPF::UInt32Type:
+                VERIFY_TAG(length == sizeof(quint32));
+                break;
+            case QFontEngineQPF::FixedType:
+                VERIFY_TAG(length == sizeof(quint32));
+                break;
+            case QFontEngineQPF::UInt8Type:
+                VERIFY_TAG(length == sizeof(quint8));
+                break;
+        }
+#if defined(DEBUG_HEADER)
+        if (length == 1)
+            qDebug() << "tag data" << hex << *tagPtr;
+        else if (length == 4)
+            qDebug() << "tag data" << hex << tagPtr[0] << tagPtr[1] << tagPtr[2] << tagPtr[3];
+#endif
+    }
+    return tagPtr + length;
+}
+
+const QFontEngineQPF::Glyph *QFontEngineQPF::findGlyph(glyph_t g) const
+{
+    if (!g || g >= glyphMapEntries)
+        return 0;
+    const quint32 *gmapPtr = reinterpret_cast<const quint32 *>(fontData + glyphMapOffset);
+    quint32 glyphPos = qFromBigEndian<quint32>(gmapPtr[g]);
+    if (glyphPos > glyphDataSize) {
+        if (glyphPos == 0xffffffff)
+            return 0;
+#if defined(DEBUG_FONTENGINE)
+        qDebug() << "glyph" << g << "outside of glyphData, remapping font file";
+#endif
+#if !defined(QT_NO_FREETYPE) && !defined(QT_FONTS_ARE_RESOURCES)
+        const_cast<QFontEngineQPF *>(this)->remapFontData();
+#endif
+        if (glyphPos > glyphDataSize)
+            return 0;
+    }
+    return reinterpret_cast<const Glyph *>(fontData + glyphDataOffset + glyphPos);
+}
+
+bool QFontEngineQPF::verifyHeader(const uchar *data, int size)
+{
+    VERIFY(size >= int(sizeof(Header)));
+    const Header *header = reinterpret_cast<const Header *>(data);
+    if (header->magic[0] != 'Q'
+        || header->magic[1] != 'P'
+        || header->magic[2] != 'F'
+        || header->magic[3] != '2')
+        return false;
+
+    VERIFY(header->majorVersion <= CurrentMajorVersion);
+    const quint16 dataSize = qFromBigEndian<quint16>(header->dataSize);
+    VERIFY(size >= int(sizeof(Header)) + dataSize);
+
+    const uchar *tagPtr = data + sizeof(Header);
+    const uchar *tagEndPtr = tagPtr + dataSize;
+    while (tagPtr < tagEndPtr - 3) {
+        tagPtr = verifyTag(tagPtr, tagEndPtr);
+        VERIFY(tagPtr);
+    }
+
+    VERIFY(tagPtr <= tagEndPtr);
+    return true;
+}
+
+QVariant QFontEngineQPF::extractHeaderField(const uchar *data, HeaderTag requestedTag)
+{
+    const Header *header = reinterpret_cast<const Header *>(data);
+    const uchar *tagPtr = data + sizeof(Header);
+    const uchar *endPtr = tagPtr + qFromBigEndian<quint16>(header->dataSize);
+    while (tagPtr < endPtr - 3) {
+        quint16 tag = readValue<quint16>(tagPtr);
+        quint16 length = readValue<quint16>(tagPtr);
+        if (tag == requestedTag) {
+            switch (tagTypes[requestedTag]) {
+                case StringType:
+                    return QVariant(QString::fromUtf8(reinterpret_cast<const char *>(tagPtr), length));
+                case UInt32Type:
+                    return QVariant(readValue<quint32>(tagPtr));
+                case UInt8Type:
+                    return QVariant(uint(*tagPtr));
+                case FixedType:
+                    return QVariant(QFixed::fromFixed(readValue<quint32>(tagPtr)).toReal());
+                case BitFieldType:
+                    return QVariant(QByteArray(reinterpret_cast<const char *>(tagPtr), length));
+            }
+            return QVariant();
+        } else if (tag == Tag_EndOfHeader) {
+            break;
+        }
+        tagPtr += length;
+    }
+
+    return QVariant();
+}
+
+#endif // QT_NO_QWS_QPF2
+
+QString qws_fontCacheDir()
+{
+    QString dir;
+#if defined(Q_WS_QWS)
+    extern QString qws_dataDir();
+    dir = qws_dataDir();
+#else
+    dir = QDir::tempPath();
+#endif
+    dir.append(QLatin1String("/fonts/"));
+    QDir qd(dir);
+    if (!qd.exists() && !qd.mkpath(dir))
+        dir = QDir::tempPath();
+    return dir;
+}
+
+#ifndef QT_NO_QWS_QPF2
+
+#ifndef QT_FONTS_ARE_RESOURCES
+QList<QByteArray> QFontEngineQPF::cleanUpAfterClientCrash(const QList<int> &crashedClientIds)
+{
+    QList<QByteArray> removedFonts;
+    QDir dir(qws_fontCacheDir(), QLatin1String("*.qsf"));
+    for (int i = 0; i < int(dir.count()); ++i) {
+        const QByteArray fileName = QFile::encodeName(dir.absoluteFilePath(dir[i]));
+
+        int fd = ::open(fileName.constData(), O_RDONLY);
+        if (fd >= 0) {
+            void *header = ::mmap(0, sizeof(QFontEngineQPF::Header), PROT_READ, MAP_SHARED, fd, 0);
+            if (header && header != MAP_FAILED) {
+                quint32 lockValue = reinterpret_cast<QFontEngineQPF::Header *>(header)->lock;
+
+                if (lockValue && crashedClientIds.contains(lockValue)) {
+                    removedFonts.append(fileName);
+                    QFile::remove(QFile::decodeName(fileName));
+                }
+
+                ::munmap(header, sizeof(QFontEngineQPF::Header));
+            }
+            ::close(fd);
+        }
+    }
+    if (!removedFonts.isEmpty())
+        qDebug() << "list of corrupted and removed fonts:" << removedFonts;
+    return removedFonts;
+}
+#endif
+
+static inline unsigned int getChar(const QChar *str, int &i, const int len)
+{
+    unsigned int uc = str[i].unicode();
+    if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) {
+        uint low = str[i+1].unicode();
+       if (low >= 0xdc00 && low < 0xe000) {
+            uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000;
+            ++i;
+        }
+    }
+    return uc;
+}
+#ifdef QT_FONTS_ARE_RESOURCES
+QFontEngineQPF::QFontEngineQPF(const QFontDef &def, const uchar *bytes, int size)
+    : fd(-1), fontData(bytes), dataSize(size), renderingFontEngine(0)
+#else
+QFontEngineQPF::QFontEngineQPF(const QFontDef &def, int fileDescriptor, QFontEngine *fontEngine)
+    : fd(fileDescriptor), fontData(0), dataSize(0), renderingFontEngine(fontEngine)
+#endif
+{
+    fontDef = def;
+    cache_cost = 100;
+    freetype = 0;
+    externalCMap = 0;
+    cmapOffset = 0;
+    cmapSize = 0;
+    glyphMapOffset = 0;
+    glyphMapEntries = 0;
+    glyphDataOffset = 0;
+    glyphDataSize = 0;
+    kerning_pairs_loaded = false;
+    readOnly = true;
+
+#if defined(DEBUG_FONTENGINE)
+    qDebug() << "QFontEngineQPF::QFontEngineQPF( fd =" << fd << ", renderingFontEngine =" << renderingFontEngine << ")";
+#endif
+
+#ifndef QT_FONTS_ARE_RESOURCES
+    if (fd < 0) {
+        if (!renderingFontEngine)
+            return;
+
+        fileName = fontDef.family.toLower() + QLatin1String("_")
+                   + QString::number(fontDef.pixelSize)
+                   + QLatin1String("_") + QString::number(fontDef.weight)
+                   + (fontDef.style != QFont::StyleNormal ?
+                      QLatin1String("_italic") : QLatin1String(""))
+                   + QLatin1String(".qsf");
+        fileName.replace(QLatin1Char(' '), QLatin1Char('_'));
+        fileName.prepend(qws_fontCacheDir());
+
+        const QByteArray encodedName = QFile::encodeName(fileName);
+        if (::access(encodedName, F_OK) == 0) {
+#if defined(DEBUG_FONTENGINE)
+            qDebug() << "found existing qpf:" << fileName;
+#endif
+            if (::access(encodedName, W_OK | R_OK) == 0)
+                fd = ::open(encodedName, O_RDWR);
+            else if (::access(encodedName, R_OK) == 0)
+                fd = ::open(encodedName, O_RDONLY);
+        } else {
+#if defined(DEBUG_FONTENGINE)
+            qDebug() << "creating qpf on the fly:" << fileName;
+#endif
+            if (::access(QFile::encodeName(qws_fontCacheDir()), W_OK) == 0) {
+                fd = ::open(encodedName, O_RDWR | O_EXCL | O_CREAT, 0644);
+
+                QBuffer buffer;
+                buffer.open(QIODevice::ReadWrite);
+                QPFGenerator generator(&buffer, renderingFontEngine);
+                generator.generate();
+                buffer.close();
+                const QByteArray &data = buffer.data();
+                ::write(fd, data.constData(), data.size());
+            }
+        }
+    }
+
+    QT_STATBUF st;
+    if (QT_FSTAT(fd, &st)) {
+#if defined(DEBUG_FONTENGINE)
+        qDebug() << "stat failed!";
+#endif
+        return;
+    }
+    dataSize = st.st_size;
+
+
+    fontData = (const uchar *)::mmap(0, st.st_size, PROT_READ | (renderingFontEngine ? PROT_WRITE : 0), MAP_SHARED, fd, 0);
+    if (!fontData || fontData == (const uchar *)MAP_FAILED) {
+#if defined(DEBUG_FONTENGINE)
+        perror("mmap failed");
+#endif
+        fontData = 0;
+        return;
+    }
+#endif //QT_FONTS_ARE_RESOURCES
+
+    if (!verifyHeader(fontData, dataSize)) {
+#if defined(DEBUG_FONTENGINE)
+        qDebug() << "verifyHeader failed!";
+#endif
+        return;
+    }
+
+    const Header *header = reinterpret_cast<const Header *>(fontData);
+
+    readOnly = (header->lock == 0xffffffff);
+
+    const uchar *data = fontData + sizeof(Header) + qFromBigEndian<quint16>(header->dataSize);
+    const uchar *endPtr = fontData + dataSize;
+    while (data <= endPtr - 8) {
+        quint16 blockTag = readValue<quint16>(data);
+        data += 2; // skip padding
+        quint32 blockSize = readValue<quint32>(data);
+
+        if (blockTag == CMapBlock) {
+            cmapOffset = data - fontData;
+            cmapSize = blockSize;
+        } else if (blockTag == GMapBlock) {
+            glyphMapOffset = data - fontData;
+            glyphMapEntries = blockSize / 4;
+        } else if (blockTag == GlyphBlock) {
+            glyphDataOffset = data - fontData;
+            glyphDataSize = blockSize;
+        }
+
+        data += blockSize;
+    }
+
+    face_id.filename = QFile::encodeName(extractHeaderField(fontData, Tag_FileName).toString());
+    face_id.index = extractHeaderField(fontData, Tag_FileIndex).toInt();
+#if !defined(QT_NO_FREETYPE) && !defined(QT_FONTS_ARE_RESOURCES)
+    freetype = QFreetypeFace::getFace(face_id);
+    if (!freetype) {
+        QString newPath =
+#ifndef QT_NO_SETTINGS
+            QLibraryInfo::location(QLibraryInfo::LibrariesPath) +
+#endif
+                          QLatin1String("/fonts/") +
+                          QFileInfo(QFile::decodeName(face_id.filename)).fileName();
+        face_id.filename = QFile::encodeName(newPath);
+        freetype = QFreetypeFace::getFace(face_id);
+    }
+    if (freetype) {
+        const quint32 qpfTtfRevision = extractHeaderField(fontData, Tag_FontRevision).toUInt();
+        uchar data[4];
+        uint length = 4;
+        bool ok = freetype->getSfntTable(MAKE_TAG('h', 'e', 'a', 'd'), data, &length);
+        if (!ok || length != 4
+            || qFromBigEndian<quint32>(data) != qpfTtfRevision) {
+            freetype->release(face_id);
+            freetype = 0;
+        }
+    }
+    if (!cmapOffset && freetype) {
+        freetypeCMapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p'));
+        externalCMap = reinterpret_cast<const uchar *>(freetypeCMapTable.constData());
+        cmapSize = freetypeCMapTable.size();
+    }
+#endif
+
+    // get the real cmap
+    if (cmapOffset) {
+        int tableSize = cmapSize;
+        const uchar *cmapPtr = getCMap(fontData + cmapOffset, tableSize, &symbol, &cmapSize);
+        if (cmapPtr)
+            cmapOffset = cmapPtr - fontData;
+        else
+            cmapOffset = 0;
+    } else if (externalCMap) {
+        int tableSize = cmapSize;
+        externalCMap = getCMap(externalCMap, tableSize, &symbol, &cmapSize);
+    }
+
+    // verify all the positions in the glyphMap
+    if (glyphMapOffset) {
+        const quint32 *gmapPtr = reinterpret_cast<const quint32 *>(fontData + glyphMapOffset);
+        for (uint i = 0; i < glyphMapEntries; ++i) {
+            quint32 glyphDataPos = qFromBigEndian<quint32>(gmapPtr[i]);
+            if (glyphDataPos == 0xffffffff)
+                continue;
+            if (glyphDataPos >= glyphDataSize) {
+                // error
+                glyphMapOffset = 0;
+                glyphMapEntries = 0;
+                break;
+            }
+        }
+    }
+
+#if defined(DEBUG_FONTENGINE)
+    if (!isValid())
+        qDebug() << "fontData" <<  fontData << "dataSize" << dataSize
+                 << "externalCMap" << externalCMap << "cmapOffset" << cmapOffset
+                 << "glyphMapOffset" << glyphMapOffset << "glyphDataOffset" << glyphDataOffset
+                 << "fd" << fd << "glyphDataSize" << glyphDataSize;
+#endif
+#if defined(Q_WS_QWS)
+    if (isValid() && renderingFontEngine)
+        qt_fbdpy->sendFontCommand(QWSFontCommand::StartedUsingFont, QFile::encodeName(fileName));
+#endif
+}
+
+QFontEngineQPF::~QFontEngineQPF()
+{
+#if defined(Q_WS_QWS)
+    if (isValid() && renderingFontEngine)
+        qt_fbdpy->sendFontCommand(QWSFontCommand::StoppedUsingFont, QFile::encodeName(fileName));
+#endif
+    delete renderingFontEngine;
+    if (fontData)
+        munmap((void *)fontData, dataSize);
+    if (fd != -1)
+        ::close(fd);
+#if !defined(QT_NO_FREETYPE)
+    if (freetype)
+        freetype->release(face_id);
+#endif
+}
+
+bool QFontEngineQPF::getSfntTableData(uint tag, uchar *buffer, uint *length) const
+{
+#if !defined(QT_NO_FREETYPE)
+    if (freetype)
+        return freetype->getSfntTable(tag, buffer, length);
+#endif
+    Q_UNUSED(tag);
+    Q_UNUSED(buffer);
+    *length = 0;
+    return false;
+}
+
+bool QFontEngineQPF::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const
+{
+    if (!externalCMap && !cmapOffset && renderingFontEngine) {
+        if (!renderingFontEngine->stringToCMap(str, len, glyphs, nglyphs, flags))
+            return false;
+#ifndef QT_NO_FREETYPE
+        const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(*glyphs);
+#endif
+        return true;
+    }
+
+    if (*nglyphs < len) {
+        *nglyphs = len;
+        return false;
+    }
+
+#if defined(DEBUG_FONTENGINE)
+    QSet<QChar> seenGlyphs;
+#endif
+
+    const uchar *cmap = externalCMap ? externalCMap : (fontData + cmapOffset);
+
+    bool mirrored = flags & QTextEngine::RightToLeft;
+    int glyph_pos = 0;
+    if (symbol) {
+        for (int i = 0; i < len; ++i) {
+            unsigned int uc = getChar(str, i, len);
+            if (mirrored)
+                uc = QChar::mirroredChar(uc);
+            glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc);
+            if(!glyphs->glyphs[glyph_pos] && uc < 0x100)
+                glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc + 0xf000);
+            ++glyph_pos;
+        }
+    } else {
+        for (int i = 0; i < len; ++i) {
+            unsigned int uc = getChar(str, i, len);
+            if (mirrored)
+                uc = QChar::mirroredChar(uc);
+            glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc);
+#if 0 && defined(DEBUG_FONTENGINE)
+            QChar c(uc);
+            if (!findGlyph(glyphs[glyph_pos].glyph) && !seenGlyphs.contains(c))
+                qDebug() << "glyph for character" << c << "/" << hex << uc << "is" << dec << glyphs[glyph_pos].glyph;
+
+            seenGlyphs.insert(c);
+#endif
+            ++glyph_pos;
+        }
+    }
+
+    *nglyphs = glyph_pos;
+    glyphs->numGlyphs = glyph_pos;
+    recalcAdvances(glyphs, flags);
+    return true;
+}
+
+void QFontEngineQPF::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const
+{
+#ifndef QT_NO_FREETYPE
+    const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(*glyphs);
+#endif
+    for (int i = 0; i < glyphs->numGlyphs; ++i) {
+        const Glyph *g = findGlyph(glyphs->glyphs[i]);
+        if (!g) {
+            glyphs->glyphs[i] = 0;
+            continue;
+        }
+        glyphs->advances_x[i] = g->advance;
+        glyphs->advances_y[i] = 0;
+    }
+}
+
+QImage QFontEngineQPF::alphaMapForGlyph(glyph_t g)
+{
+    const Glyph *glyph = findGlyph(g);
+    if (!glyph)
+	QImage();
+
+    const uchar *bits = ((const uchar *) glyph) + sizeof(Glyph);
+
+    QImage image(glyph->width, glyph->height, QImage::Format_Indexed8);
+    for (int j=0; j<256; ++j)
+	image.setColor(j, 0xff000000 | j | (j<<8) | (j<<16));
+
+    for (int i=0; i<glyph->height; ++i) {
+	memcpy(image.scanLine(i), bits, glyph->bytesPerLine);
+	bits += glyph->bytesPerLine;
+    }
+    return image;
+}
+
+void QFontEngineQPF::draw(QPaintEngine *p, qreal _x, qreal _y, const QTextItemInt &si)
+{
+    QPaintEngineState *pState = p->state;
+    QRasterPaintEngine *paintEngine = static_cast<QRasterPaintEngine*>(p);
+
+    QTransform matrix = pState->transform();
+    matrix.translate(_x, _y);
+    QFixed x = QFixed::fromReal(matrix.dx());
+    QFixed y = QFixed::fromReal(matrix.dy());
+
+    QVarLengthArray<QFixedPoint> positions;
+    QVarLengthArray<glyph_t> glyphs;
+    getGlyphPositions(si.glyphs, matrix, si.flags, glyphs, positions);
+    if (glyphs.size() == 0)
+        return;
+
+    for(int i = 0; i < glyphs.size(); i++) {
+        const Glyph *glyph = findGlyph(glyphs[i]);
+        if (!glyph)
+            continue;
+
+        const int depth = 8; //###
+
+        paintEngine->alphaPenBlt(reinterpret_cast<const uchar *>(glyph) + sizeof(Glyph), glyph->bytesPerLine, depth,
+                                     qRound(positions[i].x) + glyph->x,
+                                     qRound(positions[i].y) + glyph->y,
+                                     glyph->width, glyph->height);
+    }
+}
+
+void QFontEngineQPF::addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags)
+{
+    if (renderingFontEngine &&
+        (renderingFontEngine->type() != QFontEngine::Proxy
+         || static_cast<QProxyFontEngine *>(renderingFontEngine)->capabilities() & QAbstractFontEngine::CanOutlineGlyphs)) {
+        renderingFontEngine->addOutlineToPath(x, y, glyphs, path, flags);
+        return;
+    }
+    addBitmapFontToPath(x, y, glyphs, path, flags);
+}
+
+glyph_metrics_t QFontEngineQPF::boundingBox(const QGlyphLayout &glyphs)
+{
+#ifndef QT_NO_FREETYPE
+    const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(glyphs);
+#endif
+
+    glyph_metrics_t overall;
+    // initialize with line height, we get the same behaviour on all platforms
+    overall.y = -ascent();
+    overall.height = ascent() + descent() + 1;
+
+    QFixed ymax = 0;
+    QFixed xmax = 0;
+    for (int i = 0; i < glyphs.numGlyphs; i++) {
+        const Glyph *g = findGlyph(glyphs.glyphs[i]);
+        if (!g)
+            continue;
+
+        QFixed x = overall.xoff + glyphs.offsets[i].x + g->x;
+        QFixed y = overall.yoff + glyphs.offsets[i].y + g->y;
+        overall.x = qMin(overall.x, x);
+        overall.y = qMin(overall.y, y);
+        xmax = qMax(xmax, x + g->width);
+        ymax = qMax(ymax, y + g->height);
+        overall.xoff += g->advance;
+    }
+    overall.height = qMax(overall.height, ymax - overall.y);
+    overall.width = xmax - overall.x;
+
+    return overall;
+}
+
+glyph_metrics_t QFontEngineQPF::boundingBox(glyph_t glyph)
+{
+#ifndef QT_NO_FREETYPE
+    {
+        QGlyphLayoutArray<1> tmp;
+        tmp.glyphs[0] = glyph;
+        const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(tmp);
+    }
+#endif
+    glyph_metrics_t overall;
+    const Glyph *g = findGlyph(glyph);
+    if (!g)
+        return overall;
+    overall.x = g->x;
+    overall.y = g->y;
+    overall.width = g->width;
+    overall.height = g->height;
+    overall.xoff = g->advance;
+    return overall;
+}
+
+QFixed QFontEngineQPF::ascent() const
+{
+    return QFixed::fromReal(extractHeaderField(fontData, Tag_Ascent).value<qreal>());
+}
+
+QFixed QFontEngineQPF::descent() const
+{
+    return QFixed::fromReal(extractHeaderField(fontData, Tag_Descent).value<qreal>());
+}
+
+QFixed QFontEngineQPF::leading() const
+{
+    return QFixed::fromReal(extractHeaderField(fontData, Tag_Leading).value<qreal>());
+}
+
+qreal QFontEngineQPF::maxCharWidth() const
+{
+    return extractHeaderField(fontData, Tag_MaxCharWidth).value<qreal>();
+}
+
+qreal QFontEngineQPF::minLeftBearing() const
+{
+    return extractHeaderField(fontData, Tag_MinLeftBearing).value<qreal>();
+}
+
+qreal QFontEngineQPF::minRightBearing() const
+{
+    return extractHeaderField(fontData, Tag_MinRightBearing).value<qreal>();
+}
+
+QFixed QFontEngineQPF::underlinePosition() const
+{
+    return QFixed::fromReal(extractHeaderField(fontData, Tag_UnderlinePosition).value<qreal>());
+}
+
+QFixed QFontEngineQPF::lineThickness() const
+{
+    return QFixed::fromReal(extractHeaderField(fontData, Tag_LineThickness).value<qreal>());
+}
+
+QFontEngine::Type QFontEngineQPF::type() const
+{
+    return QFontEngine::QPF2;
+}
+
+bool QFontEngineQPF::canRender(const QChar *string, int len)
+{
+    const uchar *cmap = externalCMap ? externalCMap : (fontData + cmapOffset);
+
+    if (symbol) {
+        for (int i = 0; i < len; ++i) {
+            unsigned int uc = getChar(string, i, len);
+            glyph_t g = getTrueTypeGlyphIndex(cmap, uc);
+            if(!g && uc < 0x100)
+                g = getTrueTypeGlyphIndex(cmap, uc + 0xf000);
+            if (!g)
+                return false;
+        }
+    } else {
+        for (int i = 0; i < len; ++i) {
+            unsigned int uc = getChar(string, i, len);
+            if (!getTrueTypeGlyphIndex(cmap, uc))
+                return false;
+        }
+    }
+    return true;
+}
+
+bool QFontEngineQPF::isValid() const
+{
+    return fontData && dataSize && (cmapOffset || externalCMap || renderingFontEngine)
+           && glyphMapOffset && glyphDataOffset && (fd >= 0 || glyphDataSize > 0);
+}
+
+#if !defined(QT_NO_FREETYPE)
+FT_Face QFontEngineQPF::lockFace() const
+{
+    Q_ASSERT(freetype);
+    freetype->lock();
+    FT_Face face = freetype->face;
+
+    // ### not perfect
+    const int ysize = fontDef.pixelSize << 6;
+    const int xsize = ysize;
+
+    if (freetype->xsize != xsize || freetype->ysize != ysize) {
+        FT_Set_Char_Size(face, xsize, ysize, 0, 0);
+        freetype->xsize = xsize;
+        freetype->ysize = ysize;
+    }
+    FT_Matrix identityMatrix;
+    identityMatrix.xx = 0x10000;
+    identityMatrix.yy = 0x10000;
+    identityMatrix.xy = 0;
+    identityMatrix.yx = 0;
+    if (freetype->matrix.xx != identityMatrix.xx ||
+        freetype->matrix.yy != identityMatrix.yy ||
+        freetype->matrix.xy != identityMatrix.xy ||
+        freetype->matrix.yx != identityMatrix.yx) {
+        freetype->matrix = identityMatrix;
+        FT_Set_Transform(face, &freetype->matrix, 0);
+    }
+    return face;
+}
+
+void QFontEngineQPF::unlockFace() const
+{
+    freetype->unlock();
+}
+
+void QFontEngineQPF::doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const
+{
+    if (!kerning_pairs_loaded) {
+        kerning_pairs_loaded = true;
+        if (freetype) {
+            lockFace();
+            if (freetype->face->size->metrics.x_ppem != 0) {
+                QFixed scalingFactor(freetype->face->units_per_EM/freetype->face->size->metrics.x_ppem);
+                unlockFace();
+                const_cast<QFontEngineQPF *>(this)->loadKerningPairs(scalingFactor);
+            } else {
+                unlockFace();
+            }
+        }
+    }
+    QFontEngine::doKerning(g, flags);
+}
+
+HB_Error QFontEngineQPF::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints)
+{
+    if (!freetype)
+        return HB_Err_Not_Covered;
+    lockFace();
+    HB_Error result = freetype->getPointInOutline(glyph, flags, point, xpos, ypos, nPoints);
+    unlockFace();
+    return result;
+}
+
+QFixed QFontEngineQPF::emSquareSize() const
+{
+    if (!freetype)
+        return QFontEngine::emSquareSize();
+    if (FT_IS_SCALABLE(freetype->face))
+        return freetype->face->units_per_EM;
+    else
+        return freetype->face->size->metrics.y_ppem;
+}
+
+void QFontEngineQPF::ensureGlyphsLoaded(const QGlyphLayout &glyphs)
+{
+    if (readOnly)
+        return;
+    bool locked = false;
+    for (int i = 0; i < glyphs.numGlyphs; ++i) {
+        if (!glyphs.glyphs[i])
+            continue;
+        const Glyph *g = findGlyph(glyphs.glyphs[i]);
+        if (g)
+            continue;
+        if (!locked) {
+            if (!lockFile())
+                return;
+            locked = true;
+            g = findGlyph(glyphs.glyphs[i]);
+            if (g)
+                continue;
+        }
+        loadGlyph(glyphs.glyphs[i]);
+    }
+    if (locked) {
+        unlockFile();
+#if defined(DEBUG_FONTENGINE)
+        qDebug() << "Finished rendering glyphs\n";
+#endif
+    }
+}
+
+void QFontEngineQPF::loadGlyph(glyph_t glyph)
+{
+    quint32 glyphPos = ~0;
+
+    if (!renderingFontEngine)
+        return;
+
+    QImage img = renderingFontEngine->alphaMapForGlyph(glyph).convertToFormat(QImage::Format_Indexed8);
+    glyph_metrics_t metrics = renderingFontEngine->boundingBox(glyph);
+    renderingFontEngine->removeGlyphFromCache(glyph);
+
+    off_t oldSize = ::lseek(fd, 0, SEEK_END);
+    if (oldSize == (off_t)-1)
+        return;
+
+    Glyph g;
+    g.width = img.width();
+    g.height = img.height();
+    g.bytesPerLine = img.bytesPerLine();
+    g.x = qRound(metrics.x);
+    g.y = qRound(metrics.y);
+    g.advance = qRound(metrics.xoff);
+
+    ::write(fd, &g, sizeof(g));
+    ::write(fd, img.bits(), img.numBytes());
+
+    glyphPos = oldSize - glyphDataOffset;
+#if 0 && defined(DEBUG_FONTENGINE)
+    qDebug() << "glyphPos for new glyph" << glyph << "is" << glyphPos << "oldSize" << oldSize << "glyphDataOffset" << glyphDataOffset;
+#endif
+
+    quint32 *gmap = (quint32 *)(fontData + glyphMapOffset);
+    gmap[glyph] = qToBigEndian(glyphPos);
+
+    glyphDataSize = glyphPos + sizeof(g) + img.numBytes();
+    quint32 *blockSizePtr = (quint32 *)(fontData + glyphDataOffset - 4);
+    *blockSizePtr = qToBigEndian(glyphDataSize);
+}
+
+bool QFontEngineQPF::lockFile()
+{
+    // #### this does not handle the case when the process holding the
+    // lock hangs for some reason
+    struct flock lock;
+    lock.l_type = F_WRLCK;
+    lock.l_whence = SEEK_SET;
+    lock.l_start = 0;
+    lock.l_len = 0; // lock the whole file
+    while (fcntl(fd, F_SETLKW, &lock) != 0) {
+        if (errno == EINTR)
+            continue;
+        perror("locking qpf");
+        return false;
+    }
+    Header *header = (Header *)fontData;
+    if (header->lock) {
+        lock.l_type = F_UNLCK;
+        if (fcntl(fd, F_SETLK, &lock) != 0)
+            perror("unlocking possibly corrupt qpf");
+        return false;
+    }
+#if defined(Q_WS_QWS)
+    extern int qws_client_id;
+    // qws_client_id == 0 means we're the server. in this case we just
+    // set the id to 1
+    header->lock = qws_client_id ? qws_client_id : 1;
+#else
+    header->lock = 1;
+#endif
+    return true;
+}
+
+void QFontEngineQPF::unlockFile()
+{
+    ((Header *)fontData)->lock = 0;
+
+    struct flock lock;
+    lock.l_type = F_UNLCK;
+    lock.l_whence = SEEK_SET;
+    lock.l_start = 0;
+    lock.l_len = 0; // lock the whole file
+    if (fcntl(fd, F_SETLK, &lock) != 0) {
+        perror("unlocking qpf");
+    }
+
+    remapFontData();
+}
+
+void QFontEngineQPF::remapFontData()
+{
+    off_t newFileSize = ::lseek(fd, 0, SEEK_END);
+    if (newFileSize == (off_t)-1) {
+#ifdef DEBUG_FONTENGINE
+        perror("QFontEngineQPF::remapFontData: lseek failed");
+#endif
+        fontData = 0;
+        return;
+    }
+
+#ifndef QT_NO_MREMAP
+    fontData = static_cast<uchar *>(::mremap(const_cast<uchar *>(fontData), dataSize, newFileSize, MREMAP_MAYMOVE));
+    if (!fontData || fontData == (const uchar *)MAP_FAILED) {
+#  if defined(DEBUG_FONTENGINE)
+        perror("QFontEngineQPF::remapFontData(): mremap failed");
+#  endif
+        fontData = 0;
+    }
+
+    if (!fontData)
+#endif // QT_NO_MREMAP
+    {
+        int status = ::munmap((void *)fontData, dataSize);
+        if (status != 0)
+            qErrnoWarning(status, "QFontEngineQPF::remapFomrData: munmap failed!");
+
+        fontData = (const uchar *)::mmap(0, newFileSize, PROT_READ | (renderingFontEngine ? PROT_WRITE : 0),
+                                         MAP_SHARED, fd, 0);
+        if (!fontData || fontData == (const uchar *)MAP_FAILED) {
+#  if defined(DEBUG_FONTENGINE)
+            perror("mmap failed");
+#  endif
+            fontData = 0;
+            return;
+        }
+    }
+
+    dataSize = newFileSize;
+    glyphDataSize = newFileSize - glyphDataOffset;
+#if defined(DEBUG_FONTENGINE)
+    qDebug() << "remapped the font file to" << newFileSize << "bytes";
+#endif
+}
+
+#endif // QT_NO_FREETYPE
+
+void QPFGenerator::generate()
+{
+    writeHeader();
+    writeGMap();
+    writeBlock(QFontEngineQPF::GlyphBlock, QByteArray());
+
+    dev->seek(4); // position of header.lock
+    writeUInt32(0);
+}
+
+void QPFGenerator::writeHeader()
+{
+    QFontEngineQPF::Header header;
+
+    header.magic[0] = 'Q';
+    header.magic[1] = 'P';
+    header.magic[2] = 'F';
+    header.magic[3] = '2';
+    header.lock = 1;
+    header.majorVersion = QFontEngineQPF::CurrentMajorVersion;
+    header.minorVersion = QFontEngineQPF::CurrentMinorVersion;
+    header.dataSize = 0;
+    dev->write((const char *)&header, sizeof(header));
+
+    writeTaggedString(QFontEngineQPF::Tag_FontName, fe->fontDef.family.toUtf8());
+
+    QFontEngine::FaceId face = fe->faceId();
+    writeTaggedString(QFontEngineQPF::Tag_FileName, face.filename);
+    writeTaggedUInt32(QFontEngineQPF::Tag_FileIndex, face.index);
+
+    {
+        uchar data[4];
+        uint len = 4;
+        bool ok = fe->getSfntTableData(MAKE_TAG('h', 'e', 'a', 'd'), data, &len);
+        if (ok) {
+            const quint32 revision = qFromBigEndian<quint32>(data);
+            writeTaggedUInt32(QFontEngineQPF::Tag_FontRevision, revision);
+        }
+    }
+
+    writeTaggedQFixed(QFontEngineQPF::Tag_Ascent, fe->ascent());
+    writeTaggedQFixed(QFontEngineQPF::Tag_Descent, fe->descent());
+    writeTaggedQFixed(QFontEngineQPF::Tag_Leading, fe->leading());
+    writeTaggedQFixed(QFontEngineQPF::Tag_XHeight, fe->xHeight());
+    writeTaggedQFixed(QFontEngineQPF::Tag_AverageCharWidth, fe->averageCharWidth());
+    writeTaggedQFixed(QFontEngineQPF::Tag_MaxCharWidth, QFixed::fromReal(fe->maxCharWidth()));
+    writeTaggedQFixed(QFontEngineQPF::Tag_LineThickness, fe->lineThickness());
+    writeTaggedQFixed(QFontEngineQPF::Tag_MinLeftBearing, QFixed::fromReal(fe->minLeftBearing()));
+    writeTaggedQFixed(QFontEngineQPF::Tag_MinRightBearing, QFixed::fromReal(fe->minRightBearing()));
+    writeTaggedQFixed(QFontEngineQPF::Tag_UnderlinePosition, fe->underlinePosition());
+    writeTaggedUInt8(QFontEngineQPF::Tag_PixelSize, fe->fontDef.pixelSize);
+    writeTaggedUInt8(QFontEngineQPF::Tag_Weight, fe->fontDef.weight);
+    writeTaggedUInt8(QFontEngineQPF::Tag_Style, fe->fontDef.style);
+
+    writeTaggedUInt8(QFontEngineQPF::Tag_GlyphFormat, QFontEngineQPF::AlphamapGlyphs);
+
+    writeTaggedString(QFontEngineQPF::Tag_EndOfHeader, QByteArray());
+    align4();
+
+    const quint64 size = dev->pos();
+    header.dataSize = qToBigEndian<quint16>(size - sizeof(header));
+    dev->seek(0);
+    dev->write((const char *)&header, sizeof(header));
+    dev->seek(size);
+}
+
+void QPFGenerator::writeGMap()
+{
+    const quint16 glyphCount = fe->glyphCount();
+
+    writeUInt16(QFontEngineQPF::GMapBlock);
+    writeUInt16(0); // padding
+    writeUInt32(glyphCount * 4);
+
+    QByteArray &buffer = dev->buffer();
+    const int numBytes = glyphCount * sizeof(quint32);
+    qint64 pos = buffer.size();
+    buffer.resize(pos + numBytes);
+    qMemSet(buffer.data() + pos, 0xff, numBytes);
+    dev->seek(pos + numBytes);
+}
+
+void QPFGenerator::writeBlock(QFontEngineQPF::BlockTag tag, const QByteArray &data)
+{
+    writeUInt16(tag);
+    writeUInt16(0); // padding
+    const int padSize = ((data.size() + 3) / 4) * 4 - data.size();
+    writeUInt32(data.size() + padSize);
+    dev->write(data);
+    for (int i = 0; i < padSize; ++i)
+        writeUInt8(0);
+}
+
+void QPFGenerator::writeTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string)
+{
+    writeUInt16(tag);
+    writeUInt16(string.length());
+    dev->write(string);
+}
+
+void QPFGenerator::writeTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value)
+{
+    writeUInt16(tag);
+    writeUInt16(sizeof(value));
+    writeUInt32(value);
+}
+
+void QPFGenerator::writeTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value)
+{
+    writeUInt16(tag);
+    writeUInt16(sizeof(value));
+    writeUInt8(value);
+}
+
+void QPFGenerator::writeTaggedQFixed(QFontEngineQPF::HeaderTag tag, QFixed value)
+{
+    writeUInt16(tag);
+    writeUInt16(sizeof(quint32));
+    writeUInt32(value.value());
+}
+
+#endif // QT_NO_QWS_QPF2
+
+QFontEngineMultiQWS::QFontEngineMultiQWS(QFontEngine *fe, int _script, const QStringList &fallbacks)
+    : QFontEngineMulti(fallbacks.size() + 1),
+      fallbackFamilies(fallbacks), script(_script)
+{
+    engines[0] = fe;
+    fe->ref.ref();
+    fontDef = engines[0]->fontDef;
+}
+
+void QFontEngineMultiQWS::loadEngine(int at)
+{
+    Q_ASSERT(at < engines.size());
+    Q_ASSERT(engines.at(at) == 0);
+
+    QFontDef request = fontDef;
+    request.styleStrategy |= QFont::NoFontMerging;
+    request.family = fallbackFamilies.at(at-1);
+    engines[at] = QFontDatabase::findFont(script,
+                                          /*fontprivate*/0,
+                                          request);
+    Q_ASSERT(engines[at]);
+    engines[at]->ref.ref();
+    engines[at]->fontDef = request;
+}
+
+void QFontEngineMultiQWS::draw(QPaintEngine */*p*/, qreal /*x*/, qreal /*y*/, const QTextItemInt &/*si*/)
+{
+    qFatal("QFontEngineMultiQWS::draw should never be called!");
+}
+
+QT_END_NAMESPACE