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| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtGui module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| ****************************************************************************/ |
| #ifndef QFONTENGINE_FT_P_H |
| #define QFONTENGINE_FT_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 "private/qfontengine_p.h" |
| |
| #ifndef QT_NO_FREETYPE |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| |
| |
| #ifndef Q_OS_WIN |
| #include <unistd.h> |
| #endif |
| |
| #include <qmutex.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QFontEngineFTRawFont; |
| class QFontconfigDatabase; |
| |
| /* |
| * This class represents one font file on disk (like Arial.ttf) and is shared between all the font engines |
| * that show this font file (at different pixel sizes). |
| */ |
| class QFreetypeFace |
| { |
| public: |
| void computeSize(const QFontDef &fontDef, int *xsize, int *ysize, bool *outline_drawing); |
| QFontEngine::Properties properties() const; |
| bool getSfntTable(uint tag, uchar *buffer, uint *length) const; |
| |
| static QFreetypeFace *getFace(const QFontEngine::FaceId &face_id, |
| const QByteArray &fontData = QByteArray()); |
| void release(const QFontEngine::FaceId &face_id); |
| |
| // locks the struct for usage. Any read/write operations require locking. |
| void lock() |
| { |
| _lock.lock(); |
| } |
| void unlock() |
| { |
| _lock.unlock(); |
| } |
| |
| FT_Face face; |
| int xsize; // 26.6 |
| int ysize; // 26.6 |
| FT_Matrix matrix; |
| FT_CharMap unicode_map; |
| FT_CharMap symbol_map; |
| |
| enum { cmapCacheSize = 0x200 }; |
| glyph_t cmapCache[cmapCacheSize]; |
| |
| int fsType() const; |
| |
| int getPointInOutline(glyph_t glyph, int flags, quint32 point, QFixed *xpos, QFixed *ypos, quint32 *nPoints); |
| |
| static void addGlyphToPath(FT_Face face, FT_GlyphSlot g, const QFixedPoint &point, QPainterPath *path, FT_Fixed x_scale, FT_Fixed y_scale); |
| static void addBitmapToPath(FT_GlyphSlot slot, const QFixedPoint &point, QPainterPath *path); |
| |
| private: |
| friend class QFontEngineFT; |
| friend class QtFreetypeData; |
| friend struct QScopedPointerDeleter<QFreetypeFace>; |
| QFreetypeFace() : _lock(QMutex::Recursive) {} |
| ~QFreetypeFace() {} |
| void cleanup(); |
| QAtomicInt ref; |
| QMutex _lock; |
| QByteArray fontData; |
| |
| void *hbFace; |
| qt_destroy_func_t hbFace_destroy_func; |
| }; |
| |
| // If this is exported this breaks compilation of the windows |
| // plugin as qfontengine_ft_p.h/.cpp are also compiled there |
| #ifndef Q_OS_WIN |
| class Q_GUI_EXPORT QFontEngineFT : public QFontEngine |
| #else |
| class QFontEngineFT : public QFontEngine |
| #endif |
| { |
| public: |
| |
| /* we don't cache glyphs that are too large anyway, so we can make this struct rather small */ |
| struct Glyph { |
| ~Glyph(); |
| short linearAdvance; |
| unsigned char width; |
| unsigned char height; |
| signed char x; |
| signed char y; |
| signed char advance; |
| signed char format; |
| uchar *data; |
| }; |
| |
| struct GlyphInfo { |
| int linearAdvance; |
| unsigned short width; |
| unsigned short height; |
| short x; |
| short y; |
| short xOff; |
| short yOff; |
| }; |
| |
| struct GlyphAndSubPixelPosition |
| { |
| GlyphAndSubPixelPosition(glyph_t g, QFixed spp) : glyph(g), subPixelPosition(spp) {} |
| |
| bool operator==(const GlyphAndSubPixelPosition &other) const |
| { |
| return glyph == other.glyph && subPixelPosition == other.subPixelPosition; |
| } |
| |
| glyph_t glyph; |
| QFixed subPixelPosition; |
| }; |
| |
| struct QGlyphSet |
| { |
| QGlyphSet(); |
| ~QGlyphSet(); |
| FT_Matrix transformationMatrix; |
| bool outline_drawing; |
| |
| void removeGlyphFromCache(glyph_t index, QFixed subPixelPosition); |
| void clear(); |
| inline bool useFastGlyphData(glyph_t index, QFixed subPixelPosition) const { |
| return (index < 256 && subPixelPosition == 0); |
| } |
| inline Glyph *getGlyph(glyph_t index, QFixed subPixelPosition = 0) const; |
| void setGlyph(glyph_t index, QFixed spp, Glyph *glyph); |
| |
| inline bool isGlyphMissing(glyph_t index) const { return missing_glyphs.contains(index); } |
| inline void setGlyphMissing(glyph_t index) const { missing_glyphs.insert(index); } |
| private: |
| mutable QHash<GlyphAndSubPixelPosition, Glyph *> glyph_data; // maps from glyph index to glyph data |
| mutable QSet<glyph_t> missing_glyphs; |
| mutable Glyph *fast_glyph_data[256]; // for fast lookup of glyphs < 256 |
| mutable int fast_glyph_count; |
| }; |
| |
| virtual QFontEngine::FaceId faceId() const Q_DECL_OVERRIDE; |
| virtual QFontEngine::Properties properties() const Q_DECL_OVERRIDE; |
| virtual QFixed emSquareSize() const Q_DECL_OVERRIDE; |
| virtual bool supportsSubPixelPositions() const Q_DECL_OVERRIDE |
| { |
| return default_hint_style == HintLight || |
| default_hint_style == HintNone; |
| } |
| |
| virtual bool getSfntTableData(uint tag, uchar *buffer, uint *length) const Q_DECL_OVERRIDE; |
| virtual int synthesized() const Q_DECL_OVERRIDE; |
| |
| virtual QFixed ascent() const Q_DECL_OVERRIDE; |
| virtual QFixed descent() const Q_DECL_OVERRIDE; |
| virtual QFixed leading() const Q_DECL_OVERRIDE; |
| virtual QFixed xHeight() const Q_DECL_OVERRIDE; |
| virtual QFixed averageCharWidth() const Q_DECL_OVERRIDE; |
| |
| virtual qreal maxCharWidth() const Q_DECL_OVERRIDE; |
| virtual qreal minLeftBearing() const Q_DECL_OVERRIDE; |
| virtual qreal minRightBearing() const Q_DECL_OVERRIDE; |
| virtual QFixed lineThickness() const Q_DECL_OVERRIDE; |
| virtual QFixed underlinePosition() const Q_DECL_OVERRIDE; |
| |
| virtual glyph_t glyphIndex(uint ucs4) const Q_DECL_OVERRIDE; |
| void doKerning(QGlyphLayout *, ShaperFlags) const Q_DECL_OVERRIDE; |
| |
| virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics) Q_DECL_OVERRIDE; |
| |
| virtual bool supportsTransformation(const QTransform &transform) const Q_DECL_OVERRIDE; |
| |
| virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs, |
| QPainterPath *path, QTextItem::RenderFlags flags) Q_DECL_OVERRIDE; |
| virtual void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, |
| QPainterPath *path, QTextItem::RenderFlags flags) Q_DECL_OVERRIDE; |
| |
| virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const Q_DECL_OVERRIDE; |
| |
| virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) Q_DECL_OVERRIDE; |
| virtual glyph_metrics_t boundingBox(glyph_t glyph) Q_DECL_OVERRIDE; |
| virtual glyph_metrics_t boundingBox(glyph_t glyph, const QTransform &matrix) Q_DECL_OVERRIDE; |
| |
| virtual void recalcAdvances(QGlyphLayout *glyphs, ShaperFlags flags) const Q_DECL_OVERRIDE; |
| virtual QImage alphaMapForGlyph(glyph_t g) Q_DECL_OVERRIDE { return alphaMapForGlyph(g, 0); } |
| virtual QImage alphaMapForGlyph(glyph_t, QFixed) Q_DECL_OVERRIDE; |
| QImage alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition, const QTransform &t) Q_DECL_OVERRIDE; |
| virtual QImage alphaRGBMapForGlyph(glyph_t, QFixed subPixelPosition, const QTransform &t) Q_DECL_OVERRIDE; |
| virtual glyph_metrics_t alphaMapBoundingBox(glyph_t glyph, |
| QFixed subPixelPosition, |
| const QTransform &matrix, |
| QFontEngine::GlyphFormat format) Q_DECL_OVERRIDE; |
| virtual QImage *lockedAlphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition, |
| GlyphFormat neededFormat, const QTransform &t, |
| QPoint *offset) Q_DECL_OVERRIDE; |
| virtual bool hasInternalCaching() const Q_DECL_OVERRIDE { return cacheEnabled; } |
| virtual void unlockAlphaMapForGlyph() Q_DECL_OVERRIDE; |
| |
| virtual void removeGlyphFromCache(glyph_t glyph) Q_DECL_OVERRIDE; |
| virtual int glyphMargin(QFontEngine::GlyphFormat /* format */) Q_DECL_OVERRIDE { return 0; } |
| |
| virtual int glyphCount() const Q_DECL_OVERRIDE; |
| |
| enum Scaling { |
| Scaled, |
| Unscaled |
| }; |
| FT_Face lockFace(Scaling scale = Scaled) const; |
| void unlockFace() const; |
| |
| FT_Face non_locked_face() const; |
| |
| inline bool drawAntialiased() const { return antialias; } |
| inline bool invalid() const { return xsize == 0 && ysize == 0; } |
| inline bool isBitmapFont() const { return defaultFormat == Format_Mono; } |
| |
| inline Glyph *loadGlyph(uint glyph, QFixed subPixelPosition, GlyphFormat format = Format_None, bool fetchMetricsOnly = false) const |
| { return loadGlyph(cacheEnabled ? &defaultGlyphSet : 0, glyph, subPixelPosition, format, fetchMetricsOnly); } |
| Glyph *loadGlyph(QGlyphSet *set, uint glyph, QFixed subPixelPosition, GlyphFormat = Format_None, bool fetchMetricsOnly = false) const; |
| Glyph *loadGlyphFor(glyph_t g, QFixed subPixelPosition, GlyphFormat format, const QTransform &t, bool fetchBoundingBox = false); |
| |
| QGlyphSet *loadGlyphSet(const QTransform &matrix); |
| |
| QFontEngineFT(const QFontDef &fd); |
| virtual ~QFontEngineFT(); |
| |
| bool init(FaceId faceId, bool antiaalias, GlyphFormat defaultFormat = Format_None, |
| const QByteArray &fontData = QByteArray()); |
| bool init(FaceId faceId, bool antialias, GlyphFormat format, |
| QFreetypeFace *freetypeFace); |
| |
| virtual int getPointInOutline(glyph_t glyph, int flags, quint32 point, QFixed *xpos, QFixed *ypos, quint32 *nPoints) Q_DECL_OVERRIDE; |
| |
| |
| virtual void setDefaultHintStyle(HintStyle style) Q_DECL_OVERRIDE; |
| |
| virtual QFontEngine *cloneWithSize(qreal pixelSize) const Q_DECL_OVERRIDE; |
| bool initFromFontEngine(const QFontEngineFT *fontEngine); |
| |
| HintStyle defaultHintStyle() const { return default_hint_style; } |
| protected: |
| |
| QFreetypeFace *freetype; |
| mutable int default_load_flags; |
| HintStyle default_hint_style; |
| bool antialias; |
| bool transform; |
| bool embolden; |
| bool obliquen; |
| SubpixelAntialiasingType subpixelType; |
| int lcdFilterType; |
| bool embeddedbitmap; |
| bool cacheEnabled; |
| bool forceAutoHint; |
| |
| private: |
| friend class QFontEngineFTRawFont; |
| friend class QFontconfigDatabase; |
| friend class QBasicFontDatabase; |
| friend class QFontEngineMultiFontConfig; |
| |
| int loadFlags(QGlyphSet *set, GlyphFormat format, int flags, bool &hsubpixel, int &vfactor) const; |
| bool shouldUseDesignMetrics(ShaperFlags flags) const; |
| |
| GlyphFormat defaultFormat; |
| FT_Matrix matrix; |
| |
| QList<QGlyphSet> transformedGlyphSets; |
| mutable QGlyphSet defaultGlyphSet; |
| |
| QFontEngine::FaceId face_id; |
| |
| int xsize; |
| int ysize; |
| |
| mutable QFixed lbearing; |
| mutable QFixed rbearing; |
| QFixed line_thickness; |
| QFixed underline_position; |
| |
| FT_Size_Metrics metrics; |
| mutable bool kerning_pairs_loaded; |
| }; |
| |
| inline uint qHash(const QFontEngineFT::GlyphAndSubPixelPosition &g) |
| { |
| return (g.glyph << 8) | (g.subPixelPosition * 10).round().toInt(); |
| } |
| |
| inline QFontEngineFT::Glyph *QFontEngineFT::QGlyphSet::getGlyph(glyph_t index, QFixed subPixelPosition) const |
| { |
| if (useFastGlyphData(index, subPixelPosition)) |
| return fast_glyph_data[index]; |
| return glyph_data.value(GlyphAndSubPixelPosition(index, subPixelPosition)); |
| } |
| |
| extern FT_Library qt_getFreetype(); |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT_NO_FREETYPE |
| |
| #endif // QFONTENGINE_FT_P_H |