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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFONTENGINE_QPF_P_H
#define QFONTENGINE_QPF_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 "qfontengine_p.h"
#include <qendian.h>
#include <qbuffer.h>
#ifndef QT_NO_QWS_QPF2
#if !defined(QT_NO_FREETYPE)
# include "qfontengine_ft_p.h"
#endif
#endif
QT_BEGIN_NAMESPACE
#ifndef QT_NO_QWS_QPF2
class QFontEngine;
class QFreetypeFace;
class Q_GUI_EXPORT QFontEngineQPF : 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 Q_PACKED 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 Q_PACKED Block
{
quint16 tag;
quint16 pad;
quint32 dataSize;
};
struct Q_PACKED Glyph
{
quint8 width;
quint8 height;
quint8 bytesPerLine;
qint8 x;
qint8 y;
qint8 advance;
};
#ifdef QT_FONTS_ARE_RESOURCES
QFontEngineQPF(const QFontDef &def, const uchar *bytes, int size);
#else
QFontEngineQPF(const QFontDef &def, int fd, QFontEngine *renderingFontEngine = 0);
#endif
~QFontEngineQPF();
FaceId faceId() const { return face_id; }
bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;
void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si);
void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags);
QImage alphaMapForGlyph(glyph_t t);
glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
glyph_metrics_t boundingBox(glyph_t glyph);
QFixed ascent() const;
QFixed descent() const;
QFixed leading() const;
qreal maxCharWidth() const;
qreal minLeftBearing() const;
qreal minRightBearing() const;
QFixed underlinePosition() const;
QFixed lineThickness() const;
Type type() const;
bool canRender(const QChar *string, int len);
inline const char *name() const { return "QPF2"; }
virtual int glyphCount() const { 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);
static QList<QByteArray> cleanUpAfterClientCrash(const QList<int> &crashedClientIds);
#if !defined(QT_NO_FREETYPE)
FT_Face lockFace() const;
void unlockFace() const;
void doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const;
virtual HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints);
virtual QFixed emSquareSize() const;
#endif
inline QString fontFile() const { return fileName; }
QFontEngine *renderingEngine() const { return renderingFontEngine; }
QFontEngine *takeRenderingEngine()
{
QFontEngine *engine = renderingFontEngine;
renderingFontEngine = 0;
return engine;
}
private:
#if !defined(QT_NO_FREETYPE)
void ensureGlyphsLoaded(const QGlyphLayout &glyphs);
void loadGlyph(glyph_t glyph);
bool lockFile();
void unlockFile();
void remapFontData();
#endif
int fd;
const uchar *fontData;
int dataSize;
const uchar *externalCMap;
quint32 cmapOffset;
int cmapSize;
quint32 glyphMapOffset;
quint32 glyphMapEntries;
quint32 glyphDataOffset;
quint32 glyphDataSize;
QString fileName;
QByteArray encodedFileName;
bool readOnly;
QFreetypeFace *freetype;
FaceId face_id;
QByteArray freetypeCMapTable;
mutable bool kerning_pairs_loaded;
QFontEngine *renderingFontEngine;
};
struct QPFGenerator
{
QPFGenerator(QBuffer *device, QFontEngine *engine)
: dev(device), fe(engine) {}
void generate();
void writeHeader();
void writeGMap();
void writeBlock(QFontEngineQPF::BlockTag tag, const QByteArray &data);
void writeTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string);
void writeTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value);
void writeTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value);
void writeTaggedQFixed(QFontEngineQPF::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;
};
#endif // QT_NO_QWS_QPF2
class QFontEngineMultiQWS : public QFontEngineMulti
{
public:
QFontEngineMultiQWS(QFontEngine *fe, int script, const QStringList &fallbacks);
void loadEngine(int at);
void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si);
private:
QStringList fallbackFamilies;
int script;
};
QT_END_NAMESPACE
#endif // QFONTENGINE_QPF_P_H
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