Long live Qt 4.5!

1 files changed, 767 insertions, 0 deletions

diff --git a/tools/makeqpf/qpf2.cpp b/tools/makeqpf/qpf2.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the tools applications 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 "qpf2.h"
+
+#include <math.h>
+#include <private/qfontengine_p.h>
+#include <QFile>
+#include <qendian.h>
+
+QT_BEGIN_NAMESPACE
+
+#include "../../src/gui/text/qpfutil.cpp"
+
+int QPF::debugVerbosity = 0;
+
+// ### copied from qfontdatabase.cpp
+
+// see the Unicode subset bitfields in the MSDN docs
+static int requiredUnicodeBits[QFontDatabase::WritingSystemsCount][2] = {
+        // Any,
+    { 127, 127 },
+        // Latin,
+    { 0, 127 },
+        // Greek,
+    { 7, 127 },
+        // Cyrillic,
+    { 9, 127 },
+        // Armenian,
+    { 10, 127 },
+        // Hebrew,
+    { 11, 127 },
+        // Arabic,
+    { 13, 127 },
+        // Syriac,
+    { 71, 127 },
+    //Thaana,
+    { 72, 127 },
+    //Devanagari,
+    { 15, 127 },
+    //Bengali,
+    { 16, 127 },
+    //Gurmukhi,
+    { 17, 127 },
+    //Gujarati,
+    { 18, 127 },
+    //Oriya,
+    { 19, 127 },
+    //Tamil,
+    { 20, 127 },
+    //Telugu,
+    { 21, 127 },
+    //Kannada,
+    { 22, 127 },
+    //Malayalam,
+    { 23, 127 },
+    //Sinhala,
+    { 73, 127 },
+    //Thai,
+    { 24, 127 },
+    //Lao,
+    { 25, 127 },
+    //Tibetan,
+    { 70, 127 },
+    //Myanmar,
+    { 74, 127 },
+        // Georgian,
+    { 26, 127 },
+        // Khmer,
+    { 80, 127 },
+        // SimplifiedChinese,
+    { 126, 127 },
+        // TraditionalChinese,
+    { 126, 127 },
+        // Japanese,
+    { 126, 127 },
+        // Korean,
+    { 56, 127 },
+        // Vietnamese,
+    { 0, 127 }, // same as latin1
+        // Other,
+    { 126, 127 }
+};
+
+#define SimplifiedChineseCsbBit 18
+#define TraditionalChineseCsbBit 20
+#define JapaneseCsbBit 17
+#define KoreanCsbBit 21
+
+static QList<QFontDatabase::WritingSystem> determineWritingSystemsFromTrueTypeBits(quint32 unicodeRange[4], quint32 codePageRange[2])
+{
+    QList<QFontDatabase::WritingSystem> writingSystems;
+    bool hasScript = false;
+
+    int i;
+    for(i = 0; i < QFontDatabase::WritingSystemsCount; i++) {
+        int bit = requiredUnicodeBits[i][0];
+        int index = bit/32;
+        int flag =  1 << (bit&31);
+        if (bit != 126 && unicodeRange[index] & flag) {
+            bit = requiredUnicodeBits[i][1];
+            index = bit/32;
+
+            flag =  1 << (bit&31);
+            if (bit == 127 || unicodeRange[index] & flag) {
+                writingSystems.append(QFontDatabase::WritingSystem(i));
+                hasScript = true;
+                // qDebug("font %s: index=%d, flag=%8x supports script %d", familyName.latin1(), index, flag, i);
+            }
+        }
+    }
+    if(codePageRange[0] & (1 << SimplifiedChineseCsbBit)) {
+        writingSystems.append(QFontDatabase::SimplifiedChinese);
+        hasScript = true;
+        //qDebug("font %s supports Simplified Chinese", familyName.latin1());
+    }
+    if(codePageRange[0] & (1 << TraditionalChineseCsbBit)) {
+        writingSystems.append(QFontDatabase::TraditionalChinese);
+        hasScript = true;
+        //qDebug("font %s supports Traditional Chinese", familyName.latin1());
+    }
+    if(codePageRange[0] & (1 << JapaneseCsbBit)) {
+        writingSystems.append(QFontDatabase::Japanese);
+        hasScript = true;
+        //qDebug("font %s supports Japanese", familyName.latin1());
+    }
+    if(codePageRange[0] & (1 << KoreanCsbBit)) {
+        writingSystems.append(QFontDatabase::Korean);
+        hasScript = true;
+        //qDebug("font %s supports Korean", familyName.latin1());
+    }
+    if (!hasScript)
+        writingSystems.append(QFontDatabase::Symbol);
+
+    return writingSystems;
+}
+
+static QByteArray getWritingSystems(QFontEngine *fontEngine)
+{
+    QByteArray os2Table = fontEngine->getSfntTable(MAKE_TAG('O', 'S', '/', '2'));
+    if (os2Table.isEmpty())
+        return QByteArray();
+
+    const uchar *data = reinterpret_cast<const uchar *>(os2Table.constData());
+
+    quint32 unicodeRange[4] = {
+        qFromBigEndian<quint32>(data + 42),
+        qFromBigEndian<quint32>(data + 46),
+        qFromBigEndian<quint32>(data + 50),
+        qFromBigEndian<quint32>(data + 54)
+    };
+    quint32 codePageRange[2] = { qFromBigEndian<quint32>(data + 78), qFromBigEndian<quint32>(data + 82) };
+    QList<QFontDatabase::WritingSystem> systems = determineWritingSystemsFromTrueTypeBits(unicodeRange, codePageRange);
+
+    QByteArray bitField((QFontDatabase::WritingSystemsCount + 7) / 8, 0);
+
+    for (int i = 0; i < systems.count(); ++i) {
+        int bitPos = systems.at(i);
+        bitField[bitPos / 8] = bitField.at(bitPos / 8) | (1 << (bitPos % 8));
+    }
+
+    return bitField;
+}
+
+static QString stringify(const QByteArray &bits)
+{
+    QString result;
+    for (int i = 0; i < bits.count(); ++i) {
+        uchar currentByte = bits.at(i);
+        for (int j = 0; j < 8; ++j) {
+            if (currentByte & 1)
+                result += '1';
+            else
+                result += '0';
+            currentByte >>= 1;
+        }
+    }
+    return result;
+}
+
+static void dumpWritingSystems(const QByteArray &bits)
+{
+    QStringList writingSystems;
+
+    QString bitString = stringify(bits);
+    for (int i = 0; i < qMin(int(QFontDatabase::WritingSystemsCount), bitString.length()); ++i) {
+        if (bitString.at(i) == QLatin1Char('1'))
+            writingSystems << QFontDatabase::writingSystemName(QFontDatabase::WritingSystem(i));
+    }
+
+    qDebug() << "Supported writing systems:" << writingSystems;
+}
+
+static const char *headerTagNames[QFontEngineQPF::NumTags] = {
+    "FontName",
+    "FileName",
+    "FileIndex",
+    "FontRevision",
+    "FreeText",
+    "Ascent",
+    "Descent",
+    "Leading",
+    "XHeight",
+    "AverageCharWidth",
+    "MaxCharWidth",
+    "LineThickness",
+    "MinLeftBearing",
+    "MinRightBearing",
+    "UnderlinePosition",
+    "GlyphFormat",
+    "PixelSize",
+    "Weight",
+    "Style",
+    "EndOfHeader",
+    "WritingSystems"
+};
+
+QString QPF::fileNameForFont(const QFont &f)
+{
+    QString fileName = f.family().toLower() + "_" + QString::number(f.pixelSize())
+                       + "_" + QString::number(f.weight())
+                       + (f.italic() ? "_italic" : "")
+                       + ".qpf2";
+    fileName.replace(QLatin1Char(' '), QLatin1Char('_'));
+    return fileName;
+}
+
+QByteArray QPF::generate(const QFont &font, int options, const QList<CharacterRange> &ranges, QString *originalFontFile)
+{
+    QTextEngine engine("Test", font);
+    engine.itemize();
+    engine.shape(0);
+    QFontEngine *fontEngine = engine.fontEngine(engine.layoutData->items[0]);
+    if (fontEngine->type() == QFontEngine::Multi)
+        fontEngine = static_cast<QFontEngineMulti *>(fontEngine)->engine(0);
+
+    if (originalFontFile)
+        *originalFontFile = QFile::decodeName(fontEngine->faceId().filename);
+
+    return generate(fontEngine, options, ranges);
+}
+
+QByteArray QPF::generate(QFontEngine *fontEngine, int options, const QList<CharacterRange> &ranges)
+{
+    QPF font;
+
+    font.options = options;
+    font.addHeader(fontEngine);
+    if (options & IncludeCMap)
+        font.addCMap(fontEngine);
+    font.addGlyphs(fontEngine, ranges);
+
+    return font.qpf;
+}
+
+void QPF::addHeader(QFontEngine *fontEngine)
+{
+    QFontEngineQPF::Header *header = reinterpret_cast<QFontEngineQPF::Header *>(addBytes(sizeof(QFontEngineQPF::Header)));
+
+    header->magic[0] = 'Q';
+    header->magic[1] = 'P';
+    header->magic[2] = 'F';
+    header->magic[3] = '2';
+    if (options & RenderGlyphs)
+        header->lock = 0xffffffff;
+    else
+        header->lock = 0;
+    header->majorVersion = QFontEngineQPF::CurrentMajorVersion;
+    header->minorVersion = QFontEngineQPF::CurrentMinorVersion;
+    header->dataSize = 0;
+    int oldSize = qpf.size();
+
+    addTaggedString(QFontEngineQPF::Tag_FontName, fontEngine->fontDef.family.toUtf8());
+
+    QFontEngine::FaceId face = fontEngine->faceId();
+    addTaggedString(QFontEngineQPF::Tag_FileName, face.filename);
+    addTaggedUInt32(QFontEngineQPF::Tag_FileIndex, face.index);
+
+    {
+        const QByteArray head = fontEngine->getSfntTable(MAKE_TAG('h', 'e', 'a', 'd'));
+        const quint32 revision = qFromBigEndian<quint32>(reinterpret_cast<const uchar *>(head.constData()) + 4);
+        addTaggedUInt32(QFontEngineQPF::Tag_FontRevision, revision);
+    }
+
+    addTaggedQFixed(QFontEngineQPF::Tag_Ascent, fontEngine->ascent());
+    addTaggedQFixed(QFontEngineQPF::Tag_Descent, fontEngine->descent());
+    addTaggedQFixed(QFontEngineQPF::Tag_Leading, fontEngine->leading());
+    addTaggedQFixed(QFontEngineQPF::Tag_XHeight, fontEngine->xHeight());
+    addTaggedQFixed(QFontEngineQPF::Tag_AverageCharWidth, fontEngine->averageCharWidth());
+    addTaggedQFixed(QFontEngineQPF::Tag_MaxCharWidth, QFixed::fromReal(fontEngine->maxCharWidth()));
+    addTaggedQFixed(QFontEngineQPF::Tag_LineThickness, fontEngine->lineThickness());
+    addTaggedQFixed(QFontEngineQPF::Tag_MinLeftBearing, QFixed::fromReal(fontEngine->minLeftBearing()));
+    addTaggedQFixed(QFontEngineQPF::Tag_MinRightBearing, QFixed::fromReal(fontEngine->minRightBearing()));
+    addTaggedQFixed(QFontEngineQPF::Tag_UnderlinePosition, fontEngine->underlinePosition());
+    addTaggedUInt8(QFontEngineQPF::Tag_PixelSize, fontEngine->fontDef.pixelSize);
+    addTaggedUInt8(QFontEngineQPF::Tag_Weight, fontEngine->fontDef.weight);
+    addTaggedUInt8(QFontEngineQPF::Tag_Style, fontEngine->fontDef.style);
+
+    QByteArray writingSystemBitField = getWritingSystems(fontEngine);
+    if (!writingSystemBitField.isEmpty())
+        addTaggedString(QFontEngineQPF::Tag_WritingSystems, writingSystemBitField);
+
+    addTaggedUInt8(QFontEngineQPF::Tag_GlyphFormat, QFontEngineQPF::AlphamapGlyphs);
+
+    addTaggedString(QFontEngineQPF::Tag_EndOfHeader, QByteArray());
+    align4();
+    header = reinterpret_cast<QFontEngineQPF::Header *>(qpf.data());
+    header->dataSize = qToBigEndian<quint16>(qpf.size() - oldSize);
+}
+
+static uchar *appendBytes(QByteArray &array, int size)
+{
+    int oldSize = array.size();
+    array.resize(array.size() + size);
+    return reinterpret_cast<uchar *>(array.data() + oldSize);
+}
+
+#define APPEND(type, value) \
+    qToBigEndian<type>(value, appendBytes(cmap, sizeof(type)))
+
+struct CMapSegment
+{
+    int start; // codepoints
+    int end;
+    int startGlyphIndex;
+};
+
+static QByteArray generateTrueTypeCMap(QFontEngine *fe)
+{
+    QByteArray cmap;
+    const int glyphCount = fe->glyphCount();
+    if (!glyphCount)
+        return cmap;
+
+    // cmap header
+    APPEND(quint16, 0); // table version number
+    APPEND(quint16, 1); // number of tables
+
+    // encoding record
+    APPEND(quint16, 3); // platform-id
+    APPEND(quint16, 10); // encoding-id (ucs-4)
+    const int cmapOffset = cmap.size() + sizeof(quint32);
+    APPEND(quint32, cmapOffset); // offset to sub-table
+
+    APPEND(quint16, 4); // subtable format
+    const int cmapTableLengthOffset = cmap.size();
+    APPEND(quint16, 0); // length in bytes, will fill in later
+    APPEND(quint16, 0); // language field
+
+    QList<CMapSegment> segments;
+    CMapSegment currentSegment;
+    currentSegment.start = 0xffff;
+    currentSegment.end = 0;
+    currentSegment.startGlyphIndex = 0;
+    quint32 previousGlyphIndex = 0xfffffffe;
+    bool inSegment = false;
+
+    QGlyphLayoutArray<10> layout;
+    for (uint uc = 0; uc < 0x10000; ++uc) {
+        QChar ch(uc);
+        int nglyphs = 10;
+
+        bool validGlyph = fe->stringToCMap(&ch, 1, &layout, &nglyphs, /*flags*/ 0)
+                          && nglyphs == 1 && layout.glyphs[0];
+
+        // leaving a segment?
+        if (inSegment && (!validGlyph || layout.glyphs[0] != previousGlyphIndex + 1)) {
+            Q_ASSERT(currentSegment.start != 0xffff);
+            // store the current segment
+            currentSegment.end = uc - 1;
+            segments.append(currentSegment);
+            currentSegment.start = 0xffff;
+            inSegment = false;
+        }
+        // entering a new segment?
+        if (validGlyph && (!inSegment || layout.glyphs[0] != previousGlyphIndex + 1)) {
+            currentSegment.start = uc;
+            currentSegment.startGlyphIndex = layout.glyphs[0];
+            inSegment = true;
+        }
+
+        if (validGlyph)
+            previousGlyphIndex = layout.glyphs[0];
+        else
+            previousGlyphIndex = 0xfffffffe;
+    }
+
+    currentSegment.start = 0xffff;
+    currentSegment.end = 0xffff;
+    currentSegment.startGlyphIndex = 0;
+    segments.append(currentSegment);
+
+    if (QPF::debugVerbosity > 3)
+        qDebug() << "segments:" << segments.count();
+
+    Q_ASSERT(!inSegment);
+
+    const quint16 entrySelector = int(log2(segments.count()));
+    const quint16 searchRange = 2 * (1 << entrySelector);
+    const quint16 rangeShift = segments.count() * 2 - searchRange;
+
+    if (QPF::debugVerbosity > 3)
+        qDebug() << "entrySelector" << entrySelector << "searchRange" << searchRange
+                 << "rangeShift" << rangeShift;
+
+    APPEND(quint16, segments.count() * 2); // segCountX2
+    APPEND(quint16, searchRange);
+    APPEND(quint16, entrySelector);
+    APPEND(quint16, rangeShift);
+
+    // end character codes
+    for (int i = 0; i < segments.count(); ++i)
+        APPEND(quint16, segments.at(i).end);
+
+    APPEND(quint16, 0); // pad
+
+    // start character codes
+    for (int i = 0; i < segments.count(); ++i)
+        APPEND(quint16, segments.at(i).start);
+
+    // id deltas
+    for (int i = 0; i < segments.count(); ++i)
+        APPEND(quint16, segments.at(i).startGlyphIndex - segments.at(i).start);
+
+    // id range offsets
+    for (int i = 0; i < segments.count(); ++i)
+        APPEND(quint16, 0);
+
+    uchar *lengthPtr = reinterpret_cast<uchar *>(cmap.data()) + cmapTableLengthOffset;
+    qToBigEndian<quint16>(cmap.size() - cmapOffset, lengthPtr);
+
+    return cmap;
+}
+
+void QPF::addCMap(QFontEngine *fontEngine)
+{
+    QByteArray cmapTable = fontEngine->getSfntTable(MAKE_TAG('c', 'm', 'a', 'p'));
+    if (cmapTable.isEmpty())
+        cmapTable = generateTrueTypeCMap(fontEngine);
+    addBlock(QFontEngineQPF::CMapBlock, cmapTable);
+}
+
+void QPF::addGlyphs(QFontEngine *fe, const QList<CharacterRange> &ranges)
+{
+    const quint16 glyphCount = fe->glyphCount();
+
+    QByteArray gmap;
+    gmap.resize(glyphCount * sizeof(quint32));
+    gmap.fill(char(0xff));
+    //qDebug() << "glyphCount" << glyphCount;
+
+    QByteArray glyphs;
+    if (options & RenderGlyphs) {
+        // this is only a rough estimation
+        glyphs.reserve(glyphCount 
+                * (sizeof(QFontEngineQPF::Glyph) 
+                    + qRound(fe->maxCharWidth() * (fe->ascent() + fe->descent()).toReal())));
+
+        QGlyphLayoutArray<10> layout;
+
+        foreach (CharacterRange range, ranges) {
+            if (debugVerbosity > 2)
+                qDebug() << "rendering range from" << range.start << "to" << range.end;
+            for (uint uc = range.start; uc < range.end; ++uc) {
+                QChar ch(uc);
+                int nglyphs = 10;
+                if (!fe->stringToCMap(&ch, 1, &layout, &nglyphs, /*flags*/ 0))
+                    continue;
+
+                if (nglyphs != 1)
+                    continue;
+
+                const quint32 glyphIndex = layout.glyphs[0];
+
+                if (!glyphIndex)
+                    continue;
+
+                Q_ASSERT(glyphIndex < glyphCount);
+
+                QImage img = fe->alphaMapForGlyph(glyphIndex).convertToFormat(QImage::Format_Indexed8);
+                glyph_metrics_t metrics = fe->boundingBox(glyphIndex);
+
+                const quint32 oldSize = glyphs.size();
+                glyphs.resize(glyphs.size() + sizeof(QFontEngineQPF::Glyph) + img.numBytes());
+                uchar *data = reinterpret_cast<uchar *>(glyphs.data() + oldSize);
+
+                uchar *gmapPtr = reinterpret_cast<uchar *>(gmap.data() + glyphIndex * sizeof(quint32));
+                qToBigEndian(oldSize, gmapPtr);
+
+                QFontEngineQPF::Glyph *glyph = reinterpret_cast<QFontEngineQPF::Glyph *>(data);
+                glyph->width = img.width();
+                glyph->height = img.height();
+                glyph->bytesPerLine = img.bytesPerLine();
+                glyph->x = qRound(metrics.x);
+                glyph->y = qRound(metrics.y);
+                glyph->advance = qRound(metrics.xoff);
+                data += sizeof(QFontEngineQPF::Glyph);
+
+                if (debugVerbosity && uc >= 'A' && uc <= 'z' || debugVerbosity > 1) {
+                    qDebug() << "adding glyph with index" << glyphIndex << " uc =" << char(uc) << ":\n"
+                        << "    glyph->x =" << glyph->x << "rounded from" << metrics.x << "\n"
+                        << "    glyph->y =" << glyph->y << "rounded from" << metrics.y << "\n"
+                        << "    width =" << glyph->width << "height =" << glyph->height
+                        << "    advance =" << glyph->advance << "rounded from" << metrics.xoff
+                        ;
+                }
+
+                qMemCopy(data, img.bits(), img.numBytes());
+            }
+        }
+    }
+
+    addBlock(QFontEngineQPF::GMapBlock, gmap);
+    addBlock(QFontEngineQPF::GlyphBlock, glyphs);
+}
+
+void QPF::addBlock(QFontEngineQPF::BlockTag tag, const QByteArray &blockData)
+{
+    addUInt16(tag);
+    addUInt16(0); // padding
+    const int padSize = ((blockData.size() + 3) / 4) * 4 - blockData.size();
+    addUInt32(blockData.size() + padSize);
+    addByteArray(blockData);
+    for (int i = 0; i < padSize; ++i)
+        addUInt8(0);
+}
+
+#define ADD_TAGGED_DATA(tag, qtype, type, value) \
+    addUInt16(tag); \
+    addUInt16(sizeof(qtype)); \
+    add##type(value)
+
+void QPF::addTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string)
+{
+    addUInt16(tag);
+    addUInt16(string.length());
+    addByteArray(string);
+}
+
+void QPF::addTaggedQFixed(QFontEngineQPF::HeaderTag tag, QFixed value)
+{
+    ADD_TAGGED_DATA(tag, quint32, UInt32, value.value());
+}
+
+void QPF::addTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value)
+{
+    ADD_TAGGED_DATA(tag, quint8, UInt8, value);
+}
+
+void QPF::addTaggedInt8(QFontEngineQPF::HeaderTag tag, qint8 value)
+{
+    ADD_TAGGED_DATA(tag, qint8, Int8, value);
+}
+
+void QPF::addTaggedUInt16(QFontEngineQPF::HeaderTag tag, quint16 value)
+{
+    ADD_TAGGED_DATA(tag, quint16, UInt16, value);
+}
+
+void QPF::addTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value)
+{
+    ADD_TAGGED_DATA(tag, quint32, UInt32, value);
+}
+
+void QPF::dump(const QByteArray &qpf)
+{
+    QPF font;
+    font.qpf = qpf;
+
+    const uchar *data = reinterpret_cast<const uchar *>(qpf.constData());
+    const uchar *endPtr = reinterpret_cast<const uchar *>(qpf.constData() + qpf.size());
+    data = font.dumpHeader(data);
+
+    const quint32 *gmap = 0;
+    quint32 glyphCount = 0;
+
+    while (data < endPtr) {
+        const QFontEngineQPF::Block *block = reinterpret_cast<const QFontEngineQPF::Block *>(data);
+        quint32 tag = qFromBigEndian(block->tag);
+        quint32 blockSize = qFromBigEndian(block->dataSize);
+        qDebug() << "Block: Tag =" << qFromBigEndian(block->tag) << "; Size =" << blockSize << "; Offset =" << hex << data - reinterpret_cast<const uchar *>(qpf.constData());
+        data += sizeof(QFontEngineQPF::Block);
+
+        if (debugVerbosity) {
+            if (tag == QFontEngineQPF::GMapBlock) {
+                gmap = reinterpret_cast<const quint32 *>(data);
+                glyphCount = blockSize / 4;
+                font.dumpGMapBlock(gmap, glyphCount);
+            } else if (tag == QFontEngineQPF::GlyphBlock
+                       && gmap && debugVerbosity > 1) {
+                font.dumpGlyphBlock(gmap, glyphCount, data, data + blockSize);
+            }
+        }
+
+        data += blockSize;
+    }
+}
+
+const uchar *QPF::dumpHeader(const uchar *data)
+{
+    const QFontEngineQPF::Header *header = reinterpret_cast<const QFontEngineQPF::Header *>(data);
+    qDebug() << "Header:";
+    qDebug() << "magic =" 
+             << header->magic[0]
+             << header->magic[1]
+             << header->magic[2]
+             << header->magic[3];
+    qDebug() << "lock =" << qFromBigEndian(header->lock);
+    qDebug() << "majorVersion =" << header->majorVersion;
+    qDebug() << "minorVersion =" << header->minorVersion;
+    qDebug() << "dataSize =" << qFromBigEndian(header->dataSize);
+
+    data += sizeof(QFontEngineQPF::Header);
+
+    const uchar *endPtr = data + qFromBigEndian(header->dataSize);
+
+    while (data && data < endPtr) {
+        data = dumpHeaderTag(data);
+    }
+
+    return endPtr;
+}
+
+const uchar *QPF::dumpHeaderTag(const uchar *data)
+{
+    const QFontEngineQPF::Tag *tagPtr = reinterpret_cast<const QFontEngineQPF::Tag *>(data);
+    quint16 tag = qFromBigEndian(tagPtr->tag);
+    quint16 size = qFromBigEndian(tagPtr->size);
+
+    qDebug() << "Tag =" << tag << headerTagNames[tag];
+    qDebug() << "Size =" << size;
+
+    if (tag == QFontEngineQPF::Tag_EndOfHeader)
+        return 0;
+
+    data += sizeof(QFontEngineQPF::Tag);
+
+    Q_ASSERT(tag < QFontEngineQPF::NumTags);
+
+    switch (tagTypes[tag]) {
+        case QFontEngineQPF::StringType:
+            qDebug() << "Payload =" << QString::fromUtf8(QByteArray(reinterpret_cast<const char *>(data), size));
+            break;
+        case QFontEngineQPF::FixedType:
+            Q_ASSERT(size == sizeof(quint32));
+            qDebug() << "Payload =" << QFixed::fromFixed(qFromBigEndian<quint32>(data)).toReal();
+            break;
+        case QFontEngineQPF::UInt8Type:
+            Q_ASSERT(size == sizeof(quint8));
+            qDebug() << "Payload =" << *data;
+            break;
+        case QFontEngineQPF::UInt32Type:
+            Q_ASSERT(size == sizeof(quint32));
+            qDebug() << "Payload =" << qFromBigEndian<quint32>(data);
+            break;
+        case QFontEngineQPF::BitFieldType: {
+            QByteArray bits(reinterpret_cast<const char *>(data), size);
+            qDebug() << "Payload =" << stringify(bits);
+            if (QPF::debugVerbosity > 2 && tag == QFontEngineQPF::Tag_WritingSystems)
+                dumpWritingSystems(bits);
+            } break;
+    }
+
+    data += size;
+    return data;
+}
+
+void QPF::dumpGMapBlock(const quint32 *gmap, int glyphCount)
+{
+    qDebug() << "glyphCount =" << glyphCount;
+    int renderedGlyphs = 0;
+    for (int i = 0; i < glyphCount; ++i) {
+        if (gmap[i] != 0xffffffff) {
+            const quint32 glyphPos = qFromBigEndian(gmap[i]);
+            qDebug("gmap[%d] = 0x%x / %u", i, glyphPos, glyphPos);
+            ++renderedGlyphs;
+        }
+    }
+    qDebug() << "Glyphs rendered:" << renderedGlyphs << "; Glyphs missing from the font:" << glyphCount - renderedGlyphs;
+}
+
+void QPF::dumpGlyphBlock(const quint32 *gmap, int glyphCount, const uchar *data, const uchar *endPtr)
+{
+    // glyphPos -> glyphIndex
+    QMap<quint32, quint32> reverseGlyphMap;
+    for (int i = 0; i < glyphCount; ++i) {
+        if (gmap[i] == 0xffffffff)
+            continue;
+        const quint32 glyphPos = qFromBigEndian(gmap[i]);
+        reverseGlyphMap[glyphPos] = i;
+    }
+
+    const uchar *glyphBlockBegin = data;
+    while (data < endPtr) {
+        const QFontEngineQPF::Glyph *g = reinterpret_cast<const QFontEngineQPF::Glyph *>(data);
+
+        const quint64 glyphOffset = data - glyphBlockBegin;
+        const quint32 glyphIndex = reverseGlyphMap.value(glyphOffset, 0xffffffff);
+
+        if (glyphIndex == 0xffffffff)
+            qDebug() << "############: Glyph present in glyph block is not listed in glyph map!";
+        qDebug("glyph at offset 0x%x glyphIndex = %u", quint32(glyphOffset), glyphIndex);
+        qDebug() << "    width =" << g->width << "height =" << g->height << "x =" << g->x << "y =" << g->y;
+        qDebug() << "    advance =" << g->advance << "bytesPerLine =" << g->bytesPerLine;
+
+        data += sizeof(*g);
+        if (glyphIndex == 0xffffffff || debugVerbosity > 4) {
+            dumpGlyph(data, g);
+        }
+
+        data += g->height * g->bytesPerLine;
+    }
+}
+
+void QPF::dumpGlyph(const uchar *data, const QFontEngineQPF::Glyph *glyph)
+{
+    fprintf(stderr, "---- glyph data:\n");
+    const char *alphas = " .o#";
+    for (int y = 0; y < glyph->height; ++y) {
+        for (int x = 0; x < glyph->width; ++x) {
+            const uchar value = data[y * glyph->bytesPerLine + x];
+            fprintf(stderr, "%c", alphas[value >> 6]);
+        }
+        fprintf(stderr, "\n");
+    }
+    fprintf(stderr, "----\n");
+}
+
+QT_END_NAMESPACE