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Diffstat (limited to 'src/gui/text/qfontengine_qpa_p.h')
| -rw-r--r-- | src/gui/text/qfontengine_qpa_p.h | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/gui/text/qfontengine_qpa_p.h b/src/gui/text/qfontengine_qpa_p.h new file mode 100644 index 0000000000..e15beae36f --- /dev/null +++ b/src/gui/text/qfontengine_qpa_p.h @@ -0,0 +1,262 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QFONTENGINE_QPA_P_H +#define QFONTENGINE_QPA_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_HEADER + +QT_BEGIN_NAMESPACE + +class QFontEngine; +class QFreetypeFace; +class QBuffer; + +class Q_GUI_EXPORT QFontEngineQPA : 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; + }; + + QFontEngineQPA(const QFontDef &def, const QByteArray &data); + ~QFontEngineQPA(); + + 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 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); + +private: + + const uchar *fontData; + int dataSize; + const uchar *externalCMap; + 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 QPAGenerator +{ + QPAGenerator(QBuffer *device, QFontEngine *engine) + : dev(device), fe(engine) {} + + void generate(); + void writeHeader(); + void writeGMap(); + void writeBlock(QFontEngineQPA::BlockTag tag, const QByteArray &data); + + void writeTaggedString(QFontEngineQPA::HeaderTag tag, const QByteArray &string); + void writeTaggedUInt32(QFontEngineQPA::HeaderTag tag, quint32 value); + void writeTaggedUInt8(QFontEngineQPA::HeaderTag tag, quint8 value); + void writeTaggedQFixed(QFontEngineQPA::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; +}; + +class QFontEngineMultiQPA : public QFontEngineMulti +{ +public: + QFontEngineMultiQPA(QFontEngine *fe, int script, const QStringList &fallbacks); + + void loadEngine(int at); + +private: + QStringList fallbackFamilies; + int script; +}; + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // QFONTENGINE_QPA_P_H |