Remove the QPF2 font engine

The QPF2 font engine has been kept around for compatibility
reasons in Qt 5.x, and it is time for it to retire for now. If
we want something like this in the future, we can revive it with
hardware acceleration / Qt Quick as one of the primary use cases,
but for now, it seems that Freetype and our existing caching is
sufficient also for low-end use cases.

[ChangeLog][QtGui][Text] Removed support for the legacy QPF2 font
format as well as the makeqpf tool used to generate those files.

Change-Id: Id43039c92fe5bd95b628cd769e045c029f39a350
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 0 insertions, 241 deletions

diff --git a/src/gui/text/qfontengine_qpf2_p.h b/src/gui/text/qfontengine_qpf2_p.h
deleted file mode 100644
index b2dc620ad1..0000000000
--- a/src/gui/text/qfontengine_qpf2_p.h
+++ /dev/null
@@ -1,241 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the QtGui module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QFONTENGINE_QPF2_P_H
-#define QFONTENGINE_QPF2_P_H
-
-//
-//  W A R N I N G
-//  -------------
-//
-// This file is not part of the Qt API.  It exists purely as an
-// implementation detail.  This header file may change from version to
-// version without notice, or even be removed.
-//
-// We mean it.
-//
-#include <QtCore/qconfig.h>
-#include <QtCore/qglobal.h>
-#include <QtCore/qendian.h>
-#include <QtCore/QBuffer>
-
-#include "qfontengine_p.h"
-
-#include <QtCore/QFile>
-
-QT_BEGIN_NAMESPACE
-
-class QFontEngine;
-class QFreetypeFace;
-class QBuffer;
-
-class Q_GUI_EXPORT QFontEngineQPF2 : public QFontEngine
-{
-public:
-    // if you add new tags please make sure to update the tables in
-    // qpfutil.cpp and tools/makeqpf/qpf2.cpp
-    enum HeaderTag {
-        Tag_FontName,          // 0 string
-        Tag_FileName,          // 1 string
-        Tag_FileIndex,         // 2 quint32
-        Tag_FontRevision,      // 3 quint32
-        Tag_FreeText,          // 4 string
-        Tag_Ascent,            // 5 QFixed
-        Tag_Descent,           // 6 QFixed
-        Tag_Leading,           // 7 QFixed
-        Tag_XHeight,           // 8 QFixed
-        Tag_AverageCharWidth,  // 9 QFixed
-        Tag_MaxCharWidth,      // 10 QFixed
-        Tag_LineThickness,     // 11 QFixed
-        Tag_MinLeftBearing,    // 12 QFixed
-        Tag_MinRightBearing,   // 13 QFixed
-        Tag_UnderlinePosition, // 14 QFixed
-        Tag_GlyphFormat,       // 15 quint8
-        Tag_PixelSize,         // 16 quint8
-        Tag_Weight,            // 17 quint8
-        Tag_Style,             // 18 quint8
-        Tag_EndOfHeader,       // 19 string
-        Tag_WritingSystems,    // 20 bitfield
-
-        NumTags
-    };
-
-    enum TagType {
-        StringType,
-        FixedType,
-        UInt8Type,
-        UInt32Type,
-        BitFieldType
-    };
-
-    struct Tag
-    {
-        quint16 tag;
-        quint16 size;
-    };
-
-    enum GlyphFormat {
-        BitmapGlyphs = 1,
-        AlphamapGlyphs = 8
-    };
-
-    enum {
-        CurrentMajorVersion = 2,
-        CurrentMinorVersion = 0
-    };
-
-    // The CMap is identical to the TrueType CMap table format
-    // The GMap table is a normal array with the total number of
-    // covered glyphs in the TrueType font
-    enum BlockTag {
-        CMapBlock,
-        GMapBlock,
-        GlyphBlock
-    };
-
-    struct Header
-    {
-        char magic[4]; // 'QPF2'
-        quint32 lock;  // values: 0 = unlocked, 0xffffffff = read-only, otherwise qws client id of locking process
-        quint8 majorVersion;
-        quint8 minorVersion;
-        quint16 dataSize;
-    };
-
-    struct Block
-    {
-        quint16 tag;
-        quint16 pad;
-        quint32 dataSize;
-    };
-
-    struct Glyph
-    {
-        quint8 width;
-        quint8 height;
-        quint8 bytesPerLine;
-        qint8 x;
-        qint8 y;
-        qint8 advance;
-    };
-
-    QFontEngineQPF2(const QFontDef &def, const QByteArray &data);
-    ~QFontEngineQPF2();
-
-    FaceId faceId() const override { return face_id; }
-    bool getSfntTableData(uint tag, uchar *buffer, uint *length) const override;
-
-    virtual glyph_t glyphIndex(uint ucs4) const override;
-    bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const override;
-    void recalcAdvances(QGlyphLayout *, ShaperFlags) const override;
-
-    void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags) override;
-    QImage alphaMapForGlyph(glyph_t t) override;
-
-    glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) override;
-    glyph_metrics_t boundingBox(glyph_t glyph) override;
-
-    QFixed ascent() const override;
-    QFixed capHeight() const override;
-    QFixed descent() const override;
-    QFixed leading() const override;
-    qreal maxCharWidth() const override;
-    qreal minLeftBearing() const override;
-    qreal minRightBearing() const override;
-    QFixed underlinePosition() const override;
-    QFixed lineThickness() const override;
-
-    virtual int glyphCount() const override { return glyphMapEntries; }
-
-    bool isValid() const;
-
-    const Glyph *findGlyph(glyph_t g) const;
-
-    static bool verifyHeader(const uchar *data, int size);
-    static QVariant extractHeaderField(const uchar *data, HeaderTag tag);
-
-private:
-
-    const uchar *fontData;
-    int dataSize;
-    const uchar *cmap;
-    quint32 cmapOffset;
-    int cmapSize;
-    quint32 glyphMapOffset;
-    quint32 glyphMapEntries;
-    quint32 glyphDataOffset;
-    quint32 glyphDataSize;
-    QString internalFileName;
-    QString encodedFileName;
-    bool readOnly;
-
-    FaceId face_id;
-    QByteArray freetypeCMapTable;
-    mutable bool kerning_pairs_loaded;
-};
-
-struct QPF2Generator
-{
-    QPF2Generator(QBuffer *device, QFontEngine *engine)
-        : dev(device), fe(engine) {}
-
-    void generate();
-    void writeHeader();
-    void writeGMap();
-    void writeBlock(QFontEngineQPF2::BlockTag tag, const QByteArray &data);
-
-    void writeTaggedString(QFontEngineQPF2::HeaderTag tag, const QByteArray &string);
-    void writeTaggedUInt32(QFontEngineQPF2::HeaderTag tag, quint32 value);
-    void writeTaggedUInt8(QFontEngineQPF2::HeaderTag tag, quint8 value);
-    void writeTaggedQFixed(QFontEngineQPF2::HeaderTag tag, QFixed value);
-
-    void writeUInt16(quint16 value) { value = qToBigEndian(value); dev->write((const char *)&value, sizeof(value)); }
-    void writeUInt32(quint32 value) { value = qToBigEndian(value); dev->write((const char *)&value, sizeof(value)); }
-    void writeUInt8(quint8 value) { dev->write((const char *)&value, sizeof(value)); }
-    void writeInt8(qint8 value) { dev->write((const char *)&value, sizeof(value)); }
-
-    void align4() { while (dev->pos() & 3) { dev->putChar('\0'); } }
-
-    QBuffer *dev;
-    QFontEngine *fe;
-};
-
-QT_END_NAMESPACE
-
-#endif // QFONTENGINE_QPF2_P_H