Qt 4.8
qcosmeticstroker_p.h
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41 
42 #ifndef QCOSMETICSTROKER_P_H
43 #define QCOSMETICSTROKER_P_H
44 
45 #include <private/qdrawhelper_p.h>
46 #include <private/qvectorpath_p.h>
47 #include <private/qpaintengine_raster_p.h>
48 #include <qpen.h>
49 
51 
53 
54 QT_MODULE(Gui)
55 
56 class QCosmeticStroker;
57 
58 
59 typedef bool (*StrokeLine)(QCosmeticStroker *stroker, qreal x1, qreal y1, qreal x2, qreal y2, int caps);
60 
62 {
63 public:
64  struct Point {
65  int x;
66  int y;
67  };
68  struct PointF {
71  };
72 
73  enum Caps {
74  NoCaps = 0,
75  CapBegin = 0x1,
76  CapEnd = 0x2,
77  };
78 
79  // used to avoid drop outs or duplicated points
80  enum Direction {
81  TopToBottom = 0x1,
82  BottomToTop = 0x2,
83  LeftToRight = 0x4,
84  RightToLeft = 0x8,
85  VerticalMask = 0x3,
87  };
88 
89  QCosmeticStroker(QRasterPaintEngineState *s, const QRect &dr, const QRect &dr_unclipped)
90  : state(s),
91  deviceRect(dr_unclipped),
92  clip(dr),
93  pattern(0),
94  reversePattern(0),
95  patternSize(0),
96  patternLength(0),
97  patternOffset(0),
98  current_span(0),
100  lastAxisAligned(false)
101  { setup(); }
103  void drawLine(const QPointF &p1, const QPointF &p2);
104  void drawPath(const QVectorPath &path);
105  void drawPoints(const QPoint *points, int num);
106  void drawPoints(const QPointF *points, int num);
107 
108 
112  // clip bounds in real
115 
117  bool drawCaps;
118 
119  int *pattern;
124 
125  enum { NSPANS = 255 };
129 
130  int opacity;
131 
134  int ppl;
135 
139 
140 private:
141  void setup();
142 
143  void renderCubic(const QPointF &p1, const QPointF &p2, const QPointF &p3, const QPointF &p4, int caps);
144  void renderCubicSubdivision(PointF *points, int level, int caps);
145  // used for closed subpaths
146  void calculateLastPoint(qreal rx1, qreal ry1, qreal rx2, qreal ry2);
147 
148 public:
149  bool clipLine(qreal &x1, qreal &y1, qreal &x2, qreal &y2);
150 };
151 
153 
155 
156 #endif // QCOSMETICLINE_H
double qreal
Definition: qglobal.h:1193
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
#define QT_MODULE(x)
Definition: qglobal.h:2783
#define QT_BEGIN_HEADER
Definition: qglobal.h:136
void drawLine(const QPointF &p1, const QPointF &p2)
The QPointF class defines a point in the plane using floating point precision.
Definition: qpoint.h:214
QT_FT_Span spans[NSPANS]
QT_FT_SpanFunc ProcessSpans
QCosmeticStroker(QRasterPaintEngineState *s, const QRect &dr, const QRect &dr_unclipped)
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
void renderCubic(const QPointF &p1, const QPointF &p2, const QPointF &p3, const QPointF &p4, int caps)
bool(* StrokeLine)(QCosmeticStroker *stroker, qreal x1, qreal y1, qreal x2, qreal y2, int caps)
unsigned int uint
Definition: qglobal.h:996
void drawPoints(const QPoint *points, int num)
The QPoint class defines a point in the plane using integer precision.
Definition: qpoint.h:53
The QRect class defines a rectangle in the plane using integer precision.
Definition: qrect.h:58
void calculateLastPoint(qreal rx1, qreal ry1, qreal rx2, qreal ry2)
bool clipLine(qreal &x1, qreal &y1, qreal &x2, qreal &y2)
#define QT_END_HEADER
Definition: qglobal.h:137
void drawPath(const QVectorPath &path)
QRasterPaintEngineState * state
void renderCubicSubdivision(PointF *points, int level, int caps)