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    41 

    42 #ifndef QPAINTER_P_H

    43 #define QPAINTER_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists purely as an

    50 // implementation detail.  This header file may change from version to

    51 // version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "QtGui/qbrush.h"

    57 #include "QtGui/qfont.h"

    58 #include "QtGui/qpen.h"

    59 #include "QtGui/qregion.h"

    60 #include "QtGui/qmatrix.h"

    61 #include "QtGui/qpainter.h"

    62 #include "QtGui/qpainterpath.h"

    63 #include "QtGui/qpaintengine.h"

    64 #include <QtCore/qhash.h>

    65 

    66 #include <private/qpen_p.h>

    67 

    68 QT_BEGIN_NAMESPACE

    69 

    70 class QPaintEngine;

    71 class QEmulationPaintEngine;

    72 class QPaintEngineEx;

    73 

    74 struct QTLWExtra;

    75 

    76 struct DataPtrContainer {

    77     void *ptr;

    78 };

    79 

    80 inline void *data_ptr(const QTransform &t) { return (DataPtrContainer *) &t; }

    81 inline bool qtransform_fast_equals(const QTransform &a, const QTransform &b) { return data_ptr(a) == data_ptr(b); }

    82 

    83 // QPen inline functions...

    84 inline QPen::DataPtr &data_ptr(const QPen &p) { return const_cast<QPen &>(p).data_ptr(); }

    85 inline bool qpen_fast_equals(const QPen &a, const QPen &b) { return data_ptr(a) == data_ptr(b); }

    86 inline QBrush qpen_brush(const QPen &p) { return data_ptr(p)->brush; }

    87 inline qreal qpen_widthf(const QPen &p) { return data_ptr(p)->width; }

    88 inline Qt::PenStyle qpen_style(const QPen &p) { return data_ptr(p)->style; }

    89 inline Qt::PenCapStyle qpen_capStyle(const QPen &p) { return data_ptr(p)->capStyle; }

    90 inline Qt::PenJoinStyle qpen_joinStyle(const QPen &p) { return data_ptr(p)->joinStyle; }

    91 

    92 // QBrush inline functions...

    93 inline QBrush::DataPtr &data_ptr(const QBrush &p) { return const_cast<QBrush &>(p).data_ptr(); }

    94 inline bool qbrush_fast_equals(const QBrush &a, const QBrush &b) { return data_ptr(a) == data_ptr(b); }

    95 inline Qt::BrushStyle qbrush_style(const QBrush &b) { return data_ptr(b)->style; }

    96 inline const QColor &qbrush_color(const QBrush &b) { return data_ptr(b)->color; }

    97 inline bool qbrush_has_transform(const QBrush &b) { return data_ptr(b)->transform.type() > QTransform::TxNone; }

    98 

    99 class QPainterClipInfo

   100 {

   101 public:

   102     enum ClipType { RegionClip, PathClip, RectClip, RectFClip };

   103 

   104     QPainterClipInfo(const QPainterPath &p, Qt::ClipOperation op, const QTransform &m) :

   105         clipType(PathClip), matrix(m), operation(op), path(p) { }

   106 

   107     QPainterClipInfo(const QRegion &r, Qt::ClipOperation op, const QTransform &m) :

   108         clipType(RegionClip), matrix(m), operation(op), region(r) { }

   109 

   110     QPainterClipInfo(const QRect &r, Qt::ClipOperation op, const QTransform &m) :

   111         clipType(RectClip), matrix(m), operation(op), rect(r) { }

   112 

   113     QPainterClipInfo(const QRectF &r, Qt::ClipOperation op, const QTransform &m) :

   114         clipType(RectFClip), matrix(m), operation(op), rectf(r) { }

   115 

   116     ClipType clipType;

   117     QTransform matrix;

   118     Qt::ClipOperation operation;

   119     QPainterPath path;

   120     QRegion region;

   121     QRect rect;

   122     QRectF rectf;

   123 

   124     // ###

   125 //     union {

   126 //         QRegionData *d;

   127 //         QPainterPathPrivate *pathData;

   128 

   129 //         struct {

   130 //             int x, y, w, h;

   131 //         } rectData;

   132 //         struct {

   133 //             qreal x, y, w, h;

   134 //         } rectFData;

   135 //     };

   136 

   137 };

   138 

   139 

   140 class Q_GUI_EXPORT QPainterState : public QPaintEngineState

   141 {

   142 public:

   143     QPainterState();

   144     QPainterState(const QPainterState *s);

   145     virtual ~QPainterState();

   146     void init(QPainter *p);

   147 

   148     QPointF brushOrigin;

   149     QFont font;

   150     QFont deviceFont;

   151     QPen pen;

   152     QBrush brush;

   153     QBrush bgBrush;             // background brush

   154     QRegion clipRegion;

   155     QPainterPath clipPath;

   156     Qt::ClipOperation clipOperation;

   157     QPainter::RenderHints renderHints;

   158     QList<QPainterClipInfo> clipInfo; // ### Make me smaller and faster to copy around...

   159     QTransform worldMatrix;       // World transformation matrix, not window and viewport

   160     QTransform matrix;            // Complete transformation matrix,

   161     QTransform redirectionMatrix;

   162     int wx, wy, ww, wh;         // window rectangle

   163     int vx, vy, vw, vh;         // viewport rectangle

   164     qreal opacity;

   165 

   166     uint WxF:1;                 // World transformation

   167     uint VxF:1;                 // View transformation

   168     uint clipEnabled:1;

   169 

   170     Qt::BGMode bgMode;

   171     QPainter *painter;

   172     Qt::LayoutDirection layoutDirection;

   173     QPainter::CompositionMode composition_mode;

   174     uint emulationSpecifier;

   175     uint changeFlags;

   176 };

   177 

   178 struct QPainterDummyState

   179 {

   180     QFont font;

   181     QPen pen;

   182     QBrush brush;

   183     QTransform transform;

   184 };

   185 

   186 class QPainterPrivate

   187 {

   188     Q_DECLARE_PUBLIC(QPainter)

   189 public:

   190     QPainterPrivate(QPainter *painter)

   191     : q_ptr(painter), d_ptrs(0), state(0), dummyState(0), txinv(0), inDestructor(false), d_ptrs_size(0),

   192         refcount(1), device(0), original_device(0), helper_device(0), engine(0), emulationEngine(0),

   193         extended(0)

   194     {

   195     }

   196 

   197     ~QPainterPrivate();

   198 

   199     QPainter *q_ptr;

   200     QPainterPrivate **d_ptrs;

   201 

   202     QPainterState *state;

   203     QVector<QPainterState*> states;

   204 

   205     mutable QPainterDummyState *dummyState;

   206 

   207     QTransform invMatrix;

   208     uint txinv:1;

   209     uint inDestructor : 1;

   210     uint d_ptrs_size;

   211     uint refcount;

   212 

   213     enum DrawOperation { StrokeDraw        = 0x1,

   214                          FillDraw          = 0x2,

   215                          StrokeAndFillDraw = 0x3

   216     };

   217 

   218     QPainterDummyState *fakeState() const {

   219         if (!dummyState)

   220             dummyState = new QPainterDummyState();

   221         return dummyState;

   222     }

   223 

   224     void updateEmulationSpecifier(QPainterState *s);

   225     void updateStateImpl(QPainterState *state);

   226     void updateState(QPainterState *state);

   227 

   228     void draw_helper(const QPainterPath &path, DrawOperation operation = StrokeAndFillDraw);

   229     void drawStretchedGradient(const QPainterPath &path, DrawOperation operation);

   230     void drawOpaqueBackground(const QPainterPath &path, DrawOperation operation);

   231 

   232     void updateMatrix();

   233     void updateInvMatrix();

   234 

   235     int rectSubtraction() const {

   236         return state->pen.style() != Qt::NoPen && state->pen.width() == 0 ? 1 : 0;

   237     }

   238 

   239     void checkEmulation();

   240 

   241     QTransform viewTransform() const;

   242     static bool attachPainterPrivate(QPainter *q, QPaintDevice *pdev);

   243     void detachPainterPrivate(QPainter *q);

   244 

   245     QPaintDevice *device;

   246     QPaintDevice *original_device;

   247     QPaintDevice *helper_device;

   248     QPaintEngine *engine;

   249     QEmulationPaintEngine *emulationEngine;

   250     QPaintEngineEx *extended;

   251     QBrush colorBrush;          // for fill with solid color

   252 };

   253 

   254 Q_GUI_EXPORT void qt_draw_helper(QPainterPrivate *p, const QPainterPath &path, QPainterPrivate::DrawOperation operation);

   255 

   256 QString qt_generate_brush_key(const QBrush &brush);

   257 

   258 QT_END_NAMESPACE

   259 

   260 #endif // QPAINTER_P_H