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39
40#ifndef QPAINTER_P_H
41#define QPAINTER_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 <QtCore/qvarlengtharray.h>
55#include <QtGui/private/qtguiglobal_p.h>
56#include "QtGui/qbrush.h"
57#include "QtGui/qcolorspace.h"
58#include "QtGui/qcolortransform.h"
59#include "QtGui/qfont.h"
60#include "QtGui/qpen.h"
61#include "QtGui/qregion.h"
62#include "QtGui/qpainter.h"
63#include "QtGui/qpainterpath.h"
64#include "QtGui/qpaintengine.h"
65
66#include <private/qpen_p.h>
67
68QT_BEGIN_NAMESPACE
69
70class QPaintEngine;
71class QEmulationPaintEngine;
72class QPaintEngineEx;
73struct QFixedPoint;
74
75struct QTLWExtra;
76
77struct DataPtrContainer {
78 void *ptr;
79};
80
81inline const void *data_ptr(const QTransform &t) { return (const DataPtrContainer *) &t; }
82inline bool qtransform_fast_equals(const QTransform &a, const QTransform &b) { return data_ptr(t: a) == data_ptr(t: b); }
83
84// QPen inline functions...
85inline QPen::DataPtr &data_ptr(const QPen &p) { return const_cast<QPen &>(p).data_ptr(); }
86inline bool qpen_fast_equals(const QPen &a, const QPen &b) { return data_ptr(p: a) == data_ptr(p: b); }
87inline QBrush qpen_brush(const QPen &p) { return data_ptr(p)->brush; }
88inline qreal qpen_widthf(const QPen &p) { return data_ptr(p)->width; }
89inline Qt::PenStyle qpen_style(const QPen &p) { return data_ptr(p)->style; }
90inline Qt::PenCapStyle qpen_capStyle(const QPen &p) { return data_ptr(p)->capStyle; }
91inline Qt::PenJoinStyle qpen_joinStyle(const QPen &p) { return data_ptr(p)->joinStyle; }
92
93// QBrush inline functions...
94inline QBrush::DataPtr &data_ptr(const QBrush &p) { return const_cast<QBrush &>(p).data_ptr(); }
95inline bool qbrush_fast_equals(const QBrush &a, const QBrush &b) { return data_ptr(p: a) == data_ptr(p: b); }
96inline Qt::BrushStyle qbrush_style(const QBrush &b) { return data_ptr(p: b)->style; }
97inline const QColor &qbrush_color(const QBrush &b) { return data_ptr(p: b)->color; }
98inline bool qbrush_has_transform(const QBrush &b) { return data_ptr(p: b)->transform.type() > QTransform::TxNone; }
99
100class QPainterClipInfo
101{
102public:
103 QPainterClipInfo() {} // for QVector, don't use
104 enum ClipType { RegionClip, PathClip, RectClip, RectFClip };
105
106 QPainterClipInfo(const QPainterPath &p, Qt::ClipOperation op, const QTransform &m) :
107 clipType(PathClip), matrix(m), operation(op), path(p) { }
108
109 QPainterClipInfo(const QRegion &r, Qt::ClipOperation op, const QTransform &m) :
110 clipType(RegionClip), matrix(m), operation(op), region(r) { }
111
112 QPainterClipInfo(const QRect &r, Qt::ClipOperation op, const QTransform &m) :
113 clipType(RectClip), matrix(m), operation(op), rect(r) { }
114
115 QPainterClipInfo(const QRectF &r, Qt::ClipOperation op, const QTransform &m) :
116 clipType(RectFClip), matrix(m), operation(op), rectf(r) { }
117
118 ClipType clipType;
119 QTransform matrix;
120 Qt::ClipOperation operation;
121 QPainterPath path;
122 QRegion region;
123 QRect rect;
124 QRectF rectf;
125
126 // ###
127// union {
128// QRegionData *d;
129// QPainterPathPrivate *pathData;
130
131// struct {
132// int x, y, w, h;
133// } rectData;
134// struct {
135// qreal x, y, w, h;
136// } rectFData;
137// };
138
139};
140
141Q_DECLARE_TYPEINFO(QPainterClipInfo, Q_MOVABLE_TYPE);
142
143class Q_GUI_EXPORT QPainterState : public QPaintEngineState
144{
145public:
146 QPainterState();
147 QPainterState(const QPainterState *s);
148 virtual ~QPainterState();
149 void init(QPainter *p);
150
151 QPointF brushOrigin;
152 QFont font;
153 QFont deviceFont;
154 QPen pen;
155 QBrush brush;
156 QBrush bgBrush = Qt::white; // background brush
157 QRegion clipRegion;
158 QPainterPath clipPath;
159 Qt::ClipOperation clipOperation = Qt::NoClip;
160 QPainter::RenderHints renderHints;
161 QVector<QPainterClipInfo> clipInfo; // ### Make me smaller and faster to copy around...
162 QTransform worldMatrix; // World transformation matrix, not window and viewport
163 QTransform matrix; // Complete transformation matrix,
164 QTransform redirectionMatrix;
165 int wx = 0, wy = 0, ww = 0, wh = 0; // window rectangle
166 int vx = 0, vy = 0, vw = 0, vh = 0; // viewport rectangle
167 qreal opacity = 1;
168
169 uint WxF:1; // World transformation
170 uint VxF:1; // View transformation
171 uint clipEnabled:1;
172
173 Qt::BGMode bgMode = Qt::TransparentMode;
174 QPainter *painter = nullptr;
175 Qt::LayoutDirection layoutDirection;
176 QPainter::CompositionMode composition_mode = QPainter::CompositionMode_SourceOver;
177 uint emulationSpecifier = 0;
178 uint changeFlags = 0;
179};
180
181struct QPainterDummyState
182{
183 QFont font;
184 QPen pen;
185 QBrush brush;
186 QTransform transform;
187};
188
189class QRawFont;
190class QPainterPrivate
191{
192 Q_DECLARE_PUBLIC(QPainter)
193public:
194 QPainterPrivate(QPainter *painter)
195 : q_ptr(painter), d_ptrs(nullptr), state(nullptr), dummyState(nullptr), txinv(0), inDestructor(false), d_ptrs_size(0),
196 refcount(1), device(nullptr), original_device(nullptr), helper_device(nullptr), engine(nullptr), emulationEngine(nullptr),
197 extended(nullptr)
198 {
199 }
200
201 ~QPainterPrivate();
202
203 QPainter *q_ptr;
204 QPainterPrivate **d_ptrs;
205
206 QPainterState *state;
207 QVarLengthArray<QPainterState *, 8> states;
208
209 mutable QPainterDummyState *dummyState;
210
211 QTransform invMatrix;
212 uint txinv:1;
213 uint inDestructor : 1;
214 uint d_ptrs_size;
215 uint refcount;
216
217 enum DrawOperation { StrokeDraw = 0x1,
218 FillDraw = 0x2,
219 StrokeAndFillDraw = 0x3
220 };
221
222 QPainterDummyState *fakeState() const {
223 if (!dummyState)
224 dummyState = new QPainterDummyState();
225 return dummyState;
226 }
227
228 void updateEmulationSpecifier(QPainterState *s);
229 void updateStateImpl(QPainterState *state);
230 void updateState(QPainterState *state);
231
232 void draw_helper(const QPainterPath &path, DrawOperation operation = StrokeAndFillDraw);
233 void drawStretchedGradient(const QPainterPath &path, DrawOperation operation);
234 void drawOpaqueBackground(const QPainterPath &path, DrawOperation operation);
235 void drawTextItem(const QPointF &p, const QTextItem &_ti, QTextEngine *textEngine);
236
237#if !defined(QT_NO_RAWFONT)
238 void drawGlyphs(const quint32 *glyphArray, QFixedPoint *positionArray, int glyphCount,
239 QFontEngine *fontEngine, bool overline = false, bool underline = false,
240 bool strikeOut = false);
241#endif
242
243 void updateMatrix();
244 void updateInvMatrix();
245
246 void checkEmulation();
247
248 static QPainterPrivate *get(QPainter *painter)
249 {
250 return painter->d_ptr.data();
251 }
252
253 QTransform viewTransform() const;
254 qreal effectiveDevicePixelRatio() const;
255 QTransform hidpiScaleTransform() const;
256 static bool attachPainterPrivate(QPainter *q, QPaintDevice *pdev);
257 void detachPainterPrivate(QPainter *q);
258 void initFrom(const QPaintDevice *device);
259
260 QPaintDevice *device;
261 QPaintDevice *original_device;
262 QPaintDevice *helper_device;
263 QPaintEngine *engine;
264 QEmulationPaintEngine *emulationEngine;
265 QPaintEngineEx *extended;
266 QBrush colorBrush; // for fill with solid color
267};
268
269Q_GUI_EXPORT void qt_draw_helper(QPainterPrivate *p, const QPainterPath &path, QPainterPrivate::DrawOperation operation);
270
271QString qt_generate_brush_key(const QBrush &brush);
272
273inline bool qt_pen_is_cosmetic(const QPen &pen, QPainter::RenderHints hints)
274{
275 return pen.isCosmetic() || (const_cast<QPen &>(pen).data_ptr()->defaultWidth && (hints & QPainter::Qt4CompatiblePainting));
276}
277
278QT_END_NAMESPACE
279
280#endif // QPAINTER_P_H
281

source code of qtbase/src/gui/painting/qpainter_p.h