1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the QtGui module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
9 | ** Commercial License Usage |
10 | ** Licensees holding valid commercial Qt licenses may use this file in |
11 | ** accordance with the commercial license agreement provided with the |
12 | ** Software or, alternatively, in accordance with the terms contained in |
13 | ** a written agreement between you and The Qt Company. For licensing terms |
14 | ** and conditions see https://www.qt.io/terms-conditions. For further |
15 | ** information use the contact form at https://www.qt.io/contact-us. |
16 | ** |
17 | ** GNU Lesser General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser |
19 | ** General Public License version 3 as published by the Free Software |
20 | ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
21 | ** packaging of this file. Please review the following information to |
22 | ** ensure the GNU Lesser General Public License version 3 requirements |
23 | ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
24 | ** |
25 | ** GNU General Public License Usage |
26 | ** Alternatively, this file may be used under the terms of the GNU |
27 | ** General Public License version 2.0 or (at your option) the GNU General |
28 | ** Public license version 3 or any later version approved by the KDE Free |
29 | ** Qt Foundation. The licenses are as published by the Free Software |
30 | ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
31 | ** included in the packaging of this file. Please review the following |
32 | ** information to ensure the GNU General Public License requirements will |
33 | ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
34 | ** https://www.gnu.org/licenses/gpl-3.0.html. |
35 | ** |
36 | ** $QT_END_LICENSE$ |
37 | ** |
38 | ****************************************************************************/ |
39 | |
40 | #ifndef QVECTORPATH_P_H |
41 | #define QVECTORPATH_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 | |
61 | |
62 | QT_BEGIN_NAMESPACE |
63 | |
64 | |
65 | class QPaintEngineEx; |
66 | |
67 | typedef void (*qvectorpath_cache_cleanup)(QPaintEngineEx *engine, void *data); |
68 | |
69 | struct QRealRect { |
70 | qreal x1, y1, x2, y2; |
71 | }; |
72 | |
73 | class Q_GUI_EXPORT QVectorPath |
74 | { |
75 | public: |
76 | enum Hint { |
77 | // Shape hints, in 0x000000ff, access using shape() |
78 | AreaShapeMask = 0x0001, // shape covers an area |
79 | NonConvexShapeMask = 0x0002, // shape is not convex |
80 | CurvedShapeMask = 0x0004, // shape contains curves... |
81 | LinesShapeMask = 0x0008, |
82 | RectangleShapeMask = 0x0010, |
83 | ShapeMask = 0x001f, |
84 | |
85 | // Shape hints merged into basic shapes.. |
86 | LinesHint = LinesShapeMask, |
87 | RectangleHint = AreaShapeMask | RectangleShapeMask, |
88 | EllipseHint = AreaShapeMask | CurvedShapeMask, |
89 | ConvexPolygonHint = AreaShapeMask, |
90 | PolygonHint = AreaShapeMask | NonConvexShapeMask, |
91 | RoundedRectHint = AreaShapeMask | CurvedShapeMask, |
92 | ArbitraryShapeHint = AreaShapeMask | NonConvexShapeMask | CurvedShapeMask, |
93 | |
94 | // Other hints |
95 | IsCachedHint = 0x0100, // Set if the cache hint is set |
96 | ShouldUseCacheHint = 0x0200, // Set if the path should be cached when possible.. |
97 | ControlPointRect = 0x0400, // Set if the control point rect has been calculated... |
98 | |
99 | // Shape rendering specifiers... |
100 | OddEvenFill = 0x1000, |
101 | WindingFill = 0x2000, |
102 | ImplicitClose = 0x4000, |
103 | ExplicitOpen = 0x8000 |
104 | }; |
105 | |
106 | // ### Falcon: introduca a struct XY for points so lars is not so confused... |
107 | QVectorPath(const qreal *points, |
108 | int count, |
109 | const QPainterPath::ElementType *elements = nullptr, |
110 | uint hints = ArbitraryShapeHint) |
111 | : m_elements(elements), |
112 | m_points(points), |
113 | m_count(count), |
114 | m_hints(hints) |
115 | { |
116 | } |
117 | |
118 | ~QVectorPath(); |
119 | |
120 | QRectF controlPointRect() const; |
121 | |
122 | inline Hint shape() const { return (Hint) (m_hints & ShapeMask); } |
123 | inline bool isConvex() const { return (m_hints & NonConvexShapeMask) == 0; } |
124 | inline bool isCurved() const { return m_hints & CurvedShapeMask; } |
125 | |
126 | inline bool isCacheable() const { return m_hints & ShouldUseCacheHint; } |
127 | inline bool hasImplicitClose() const { return m_hints & ImplicitClose; } |
128 | inline bool hasExplicitOpen() const { return m_hints & ExplicitOpen; } |
129 | inline bool hasWindingFill() const { return m_hints & WindingFill; } |
130 | |
131 | inline void makeCacheable() const { m_hints |= ShouldUseCacheHint; m_cache = nullptr; } |
132 | inline uint hints() const { return m_hints; } |
133 | |
134 | inline const QPainterPath::ElementType *elements() const { return m_elements; } |
135 | inline const qreal *points() const { return m_points; } |
136 | inline bool isEmpty() const { return m_points == nullptr; } |
137 | |
138 | inline int elementCount() const { return m_count; } |
139 | inline const QPainterPath convertToPainterPath() const; |
140 | |
141 | static inline uint polygonFlags(QPaintEngine::PolygonDrawMode mode) |
142 | { |
143 | switch (mode) { |
144 | case QPaintEngine::ConvexMode: return ConvexPolygonHint | ImplicitClose; |
145 | case QPaintEngine::OddEvenMode: return PolygonHint | OddEvenFill | ImplicitClose; |
146 | case QPaintEngine::WindingMode: return PolygonHint | WindingFill | ImplicitClose; |
147 | case QPaintEngine::PolylineMode: return PolygonHint | ExplicitOpen; |
148 | default: return 0; |
149 | } |
150 | } |
151 | |
152 | struct CacheEntry { |
153 | QPaintEngineEx *engine; |
154 | void *data; |
155 | qvectorpath_cache_cleanup cleanup; |
156 | CacheEntry *next; |
157 | }; |
158 | |
159 | CacheEntry *addCacheData(QPaintEngineEx *engine, void *data, qvectorpath_cache_cleanup cleanup) const; |
160 | inline CacheEntry *lookupCacheData(QPaintEngineEx *engine) const { |
161 | Q_ASSERT(m_hints & ShouldUseCacheHint); |
162 | CacheEntry *e = m_cache; |
163 | while (e) { |
164 | if (e->engine == engine) |
165 | return e; |
166 | e = e->next; |
167 | } |
168 | return nullptr; |
169 | } |
170 | |
171 | template <typename T> static inline bool isRect(const T *pts, int elementCount) { |
172 | return (elementCount == 5 // 5-point polygon, check for closed rect |
173 | && pts[0] == pts[8] && pts[1] == pts[9] // last point == first point |
174 | && pts[0] == pts[6] && pts[2] == pts[4] // x values equal |
175 | && pts[1] == pts[3] && pts[5] == pts[7] // y values equal... |
176 | && pts[0] < pts[4] && pts[1] < pts[5] |
177 | ) || |
178 | (elementCount == 4 // 4-point polygon, check for unclosed rect |
179 | && pts[0] == pts[6] && pts[2] == pts[4] // x values equal |
180 | && pts[1] == pts[3] && pts[5] == pts[7] // y values equal... |
181 | && pts[0] < pts[4] && pts[1] < pts[5] |
182 | ); |
183 | } |
184 | |
185 | inline bool isRect() const |
186 | { |
187 | const QPainterPath::ElementType * const types = elements(); |
188 | |
189 | return (shape() == QVectorPath::RectangleHint) |
190 | || (isRect(pts: points(), elementCount: elementCount()) |
191 | && (!types || (types[0] == QPainterPath::MoveToElement |
192 | && types[1] == QPainterPath::LineToElement |
193 | && types[2] == QPainterPath::LineToElement |
194 | && types[3] == QPainterPath::LineToElement))); |
195 | } |
196 | |
197 | |
198 | private: |
199 | Q_DISABLE_COPY_MOVE(QVectorPath) |
200 | |
201 | const QPainterPath::ElementType *m_elements; |
202 | const qreal *m_points; |
203 | const int m_count; |
204 | |
205 | mutable uint m_hints; |
206 | mutable QRealRect m_cp_rect; |
207 | |
208 | mutable CacheEntry *m_cache; |
209 | }; |
210 | |
211 | Q_GUI_EXPORT const QVectorPath &qtVectorPathForPath(const QPainterPath &path); |
212 | |
213 | QT_END_NAMESPACE |
214 | |
215 | #endif |
216 | |