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39 
40 #ifndef QPAINTENGINEEX_P_H
41 #define QPAINTENGINEEX_P_H
42 
43 //
44 //  W A R N I N G
45 //  -------------
46 //
47 // This file is not part of the Qt API.  It exists purely as an
48 // implementation detail.  This header file may change from version to
49 // version without notice, or even be removed.
50 //
51 // We mean it.
52 //
53 
54 #include <QtGui/private/qtguiglobal_p.h>
55 #include <QtGui/qpaintengine.h>
56 
57 #include <private/qpaintengine_p.h>
58 #include <private/qstroker_p.h>
59 #include <private/qpainter_p.h>
60 #include <private/qvectorpath_p.h>
61 
62 
63 QT_BEGIN_NAMESPACE
64 
65 
66 class QPainterState;
67 class QPaintEngineExPrivate;
68 class QStaticTextItem;
69 struct StrokeHandler;
70 
71 #ifndef QT_NO_DEBUG_STREAM
72 QDebug Q_GUI_EXPORT &operator<<(QDebug &, const QVectorPath &path);
73 #endif
74 
75 class Q_GUI_EXPORT QPaintEngineEx : public QPaintEngine
76 {
77     Q_DECLARE_PRIVATE(QPaintEngineEx)
78 public:
79     QPaintEngineEx();
80 
81     virtual QPainterState *createState(QPainterState *orig) const;
82 
83     virtual void draw(const QVectorPath &path);
84     virtual void fill(const QVectorPath &path, const QBrush &brush) = 0;
85     virtual void stroke(const QVectorPath &path, const QPen &pen);
86 
87     virtual void clip(const QVectorPath &path, Qt::ClipOperation op) = 0;
88     virtual void clip(const QRect &rect, Qt::ClipOperation op);
89     virtual void clip(const QRegion &region, Qt::ClipOperation op);
90     virtual void clip(const QPainterPath &path, Qt::ClipOperation op);
91 
92     virtual void clipEnabledChanged() = 0;
93     virtual void penChanged() = 0;
94     virtual void brushChanged() = 0;
95     virtual void brushOriginChanged() = 0;
96     virtual void opacityChanged() = 0;
97     virtual void compositionModeChanged() = 0;
98     virtual void renderHintsChanged() = 0;
99     virtual void transformChanged() = 0;
100 
101     virtual void fillRect(const QRectF &rect, const QBrush &brush);
102     virtual void fillRect(const QRectF &rect, const QColor &color);
103 
104     virtual void drawRoundedRect(const QRectF &rect, qreal xrad, qreal yrad, Qt::SizeMode mode);
105 
106     virtual void drawRects(const QRect *rects, int rectCount) override;
107     virtual void drawRects(const QRectF *rects, int rectCount) override;
108 
109     virtual void drawLines(const QLine *lines, int lineCount) override;
110     virtual void drawLines(const QLineF *lines, int lineCount) override;
111 
112     virtual void drawEllipse(const QRectF &r) override;
113     virtual void drawEllipse(const QRect &r) override;
114 
115     virtual void drawPath(const QPainterPath &path) override;
116 
117     virtual void drawPoints(const QPointF *points, int pointCount) override;
118     virtual void drawPoints(const QPoint *points, int pointCount) override;
119 
120     virtual void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode) override;
121     virtual void drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode) override;
122 
123     virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr) override = 0;
124     virtual void drawPixmap(const QPointF &pos, const QPixmap &pm);
125 
126     virtual void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
127                            Qt::ImageConversionFlags flags = Qt::AutoColor) override = 0;
128     virtual void drawImage(const QPointF &pos, const QImage &image);
129 
130     virtual void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s) override;
131 
132     virtual void drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
133                                      QFlags<QPainter::PixmapFragmentHint> hints);
134 
135     virtual void updateState(const QPaintEngineState &state) override;
136 
137     virtual void drawStaticTextItem(QStaticTextItem *);
138 
139     virtual void setState(QPainterState *s);
state()140     inline QPainterState *state() { return static_cast<QPainterState *>(QPaintEngine::state); }
state()141     inline const QPainterState *state() const { return static_cast<const QPainterState *>(QPaintEngine::state); }
142 
sync()143     virtual void sync() {}
144 
beginNativePainting()145     virtual void beginNativePainting() {}
endNativePainting()146     virtual void endNativePainting() {}
147 
148     // These flags are needed in the implementation of paint buffers.
149     enum Flags
150     {
151         DoNotEmulate = 0x01,        // If set, QPainter will not wrap this engine in an emulation engine.
152         IsEmulationEngine = 0x02    // If set, this object is a QEmulationEngine.
153     };
flags()154     virtual uint flags() const {return 0;}
155     virtual bool requiresPretransformedGlyphPositions(QFontEngine *fontEngine, const QTransform &m) const;
156     virtual bool shouldDrawCachedGlyphs(QFontEngine *fontEngine, const QTransform &m) const;
157 
158 protected:
159     QPaintEngineEx(QPaintEngineExPrivate &data);
160 };
161 
162 class Q_GUI_EXPORT QPaintEngineExPrivate : public QPaintEnginePrivate
163 {
164     Q_DECLARE_PUBLIC(QPaintEngineEx)
165 public:
166     QPaintEngineExPrivate();
167     ~QPaintEngineExPrivate();
168 
169     void replayClipOperations();
170     bool hasClipOperations() const;
171 
172     QStroker stroker;
173     QDashStroker dasher;
174     StrokeHandler *strokeHandler;
175     QStrokerOps *activeStroker;
176     QPen strokerPen;
177 
178     QRect exDeviceRect;
179 };
180 
181 QT_END_NAMESPACE
182 
183 #endif
184