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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 "qfontengine_p.h"
#ifndef QT_NO_FREETYPE
#include <ft2build.h>
#include FT_FREETYPE_H
#if defined(Q_WS_X11)
#include <private/qt_x11_p.h>
#endif
#include <unistd.h>
#ifndef QT_NO_FONTCONFIG
#include <fontconfig/fontconfig.h>
#endif
#include <qmutex.h>
#include <harfbuzz-shaper.h>
QT_BEGIN_NAMESPACE
/*
* This struct 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).
*/
struct QFreetypeFace
{
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);
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;
HB_Face hbFace;
#ifndef QT_NO_FONTCONFIG
FcCharSet *charset;
#endif
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;
HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *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, bool = false);
private:
friend class QScopedPointerDeleter<QFreetypeFace>;
QFreetypeFace() : _lock(QMutex::Recursive) {}
~QFreetypeFace() {}
QAtomicInt ref;
QMutex _lock;
QByteArray fontData;
};
class Q_GUI_EXPORT QFontEngineFT : public QFontEngine
{
public:
enum GlyphFormat {
Format_None,
Format_Render = Format_None,
Format_Mono,
Format_A8,
Format_A32
};
/* 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;
unsigned int uploadedToServer : 1;
};
enum SubpixelAntialiasingType {
Subpixel_None,
Subpixel_RGB,
Subpixel_BGR,
Subpixel_VRGB,
Subpixel_VBGR
};
#if defined(Q_WS_X11) && !defined(QT_NO_XRENDER)
typedef XGlyphInfo GlyphInfo;
#else
struct GlyphInfo {
unsigned short width;
unsigned short height;
short x;
short y;
short xOff;
short yOff;
};
#endif
struct QGlyphSet
{
QGlyphSet();
~QGlyphSet();
FT_Matrix transformationMatrix;
unsigned long id; // server sided id, GlyphSet for X11
bool outline_drawing;
void removeGlyphFromCache(int index);
void clear();
inline Glyph *getGlyph(int index) const
{
if (index < 256)
return fast_glyph_data[index];
return glyph_data.value(index);
}
void setGlyph(int index, Glyph *glyph);
private:
mutable QHash<int, Glyph *> glyph_data; // maps from glyph index to glyph data
mutable Glyph *fast_glyph_data[256]; // for fast lookup of glyphs < 256
mutable int fast_glyph_count;
};
virtual QFontEngine::FaceId faceId() const;
virtual QFontEngine::Properties properties() const;
virtual QFixed emSquareSize() const;
virtual bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
virtual int synthesized() const;
virtual QFixed ascent() const;
virtual QFixed descent() const;
virtual QFixed leading() const;
virtual QFixed xHeight() const;
virtual QFixed averageCharWidth() const;
virtual qreal maxCharWidth() const;
virtual qreal minLeftBearing() const;
virtual qreal minRightBearing() const;
virtual QFixed lineThickness() const;
virtual QFixed underlinePosition() const;
void doKerning(QGlyphLayout *, QTextEngine::ShaperFlags) const;
inline virtual Type type() const
{ return QFontEngine::Freetype; }
inline virtual const char *name() const
{ return "freetype"; }
virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
virtual bool canRender(const QChar *string, int len);
virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
QPainterPath *path, QTextItem::RenderFlags flags);
virtual void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs,
QPainterPath *path, QTextItem::RenderFlags flags);
virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
QTextEngine::ShaperFlags flags) const;
virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
virtual glyph_metrics_t boundingBox(glyph_t glyph);
virtual glyph_metrics_t boundingBox(glyph_t glyph, const QTransform &matrix);
virtual void recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const;
virtual QImage alphaMapForGlyph(glyph_t);
virtual QImage alphaRGBMapForGlyph(glyph_t, int margin, const QTransform &t);
virtual void removeGlyphFromCache(glyph_t glyph);
virtual int glyphCount() const;
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, GlyphFormat format = Format_None, bool fetchMetricsOnly = false) const
{ return loadGlyph(&defaultGlyphSet, glyph, format, fetchMetricsOnly); }
Glyph *loadGlyph(QGlyphSet *set, uint glyph, GlyphFormat = Format_None, bool fetchMetricsOnly = false) const;
QGlyphSet *defaultGlyphs() { return &defaultGlyphSet; }
GlyphFormat defaultGlyphFormat() const { return defaultFormat; }
inline Glyph *cachedGlyph(glyph_t g) const { return defaultGlyphSet.getGlyph(g); }
QGlyphSet *loadTransformedGlyphSet(const QTransform &matrix);
bool loadGlyphs(QGlyphSet *gs, glyph_t *glyphs, int num_glyphs, GlyphFormat format = Format_Render);
#if defined(Q_WS_QWS) || defined(Q_OS_SYMBIAN)
virtual void draw(QPaintEngine * /*p*/, qreal /*x*/, qreal /*y*/, const QTextItemInt & /*si*/) {}
#endif
QFontEngineFT(const QFontDef &fd);
virtual ~QFontEngineFT();
bool init(FaceId faceId, bool antiaalias, GlyphFormat defaultFormat = Format_None);
virtual HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints);
protected:
void freeGlyphSets();
virtual bool uploadGlyphToServer(QGlyphSet *set, uint glyphid, Glyph *g, GlyphInfo *info, int glyphDataSize) const;
virtual unsigned long allocateServerGlyphSet();
virtual void freeServerGlyphSet(unsigned long id);
QFreetypeFace *freetype;
int default_load_flags;
enum HintStyle {
HintNone,
HintLight,
HintMedium,
HintFull
};
HintStyle default_hint_style;
bool antialias;
bool transform;
SubpixelAntialiasingType subpixelType;
int lcdFilterType;
bool canUploadGlyphsToServer;
bool embeddedbitmap;
private:
QFontEngineFT::Glyph *loadGlyphMetrics(QGlyphSet *set, uint glyph) 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;
};
QT_END_NAMESPACE
#endif // QT_NO_FREETYPE
#endif // QFONTENGINE_FT_P_H