|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the QtGui module of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 #ifndef QOUTLINEMAPPER_P_H |
|
43 #define QOUTLINEMAPPER_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 <QtCore/qrect.h> |
|
57 |
|
58 #include <QtGui/qtransform.h> |
|
59 #include <QtGui/qpainterpath.h> |
|
60 |
|
61 #define QT_FT_BEGIN_HEADER |
|
62 #define QT_FT_END_HEADER |
|
63 |
|
64 #include <private/qrasterdefs_p.h> |
|
65 #include <private/qdatabuffer_p.h> |
|
66 #include "qpaintengineex_p.h" |
|
67 |
|
68 QT_BEGIN_NAMESPACE |
|
69 |
|
70 // This limitations comes from qgrayraster.c. Any higher and |
|
71 // rasterization of shapes will produce incorrect results. |
|
72 const int QT_RASTER_COORD_LIMIT = 32767; |
|
73 |
|
74 //#define QT_DEBUG_CONVERT |
|
75 |
|
76 /******************************************************************************** |
|
77 * class QOutlineMapper |
|
78 * |
|
79 * Used to map between QPainterPath and the QT_FT_Outline structure used by the |
|
80 * freetype scanconvertor. |
|
81 * |
|
82 * The outline mapper uses a path iterator to get points from the path, |
|
83 * so that it is possible to transform the points as they are converted. The |
|
84 * callback can be a noop, translate or full-fledged xform. (Tests indicated |
|
85 * that using a C callback was low cost). |
|
86 */ |
|
87 class QOutlineMapper |
|
88 { |
|
89 public: |
|
90 QOutlineMapper() |
|
91 : m_round_coords(false) |
|
92 { |
|
93 } |
|
94 |
|
95 /*! |
|
96 Sets up the matrix to be used for conversion. This also |
|
97 sets up the qt_path_iterator function that is used as a callback |
|
98 to get points. |
|
99 */ |
|
100 void setMatrix(const QTransform &m) |
|
101 { |
|
102 m_m11 = m.m11(); |
|
103 m_m12 = m.m12(); |
|
104 m_m13 = m.m13(); |
|
105 m_m21 = m.m21(); |
|
106 m_m22 = m.m22(); |
|
107 m_m23 = m.m23(); |
|
108 m_m33 = m.m33(); |
|
109 m_dx = m.dx(); |
|
110 m_dy = m.dy(); |
|
111 m_txop = m.type(); |
|
112 } |
|
113 |
|
114 void beginOutline(Qt::FillRule fillRule) |
|
115 { |
|
116 #ifdef QT_DEBUG_CONVERT |
|
117 printf("QOutlineMapper::beginOutline rule=%d\n", fillRule); |
|
118 #endif |
|
119 m_valid = true; |
|
120 m_elements.reset(); |
|
121 m_elements_dev.reset(); |
|
122 m_element_types.reset(); |
|
123 m_points.reset(); |
|
124 m_tags.reset(); |
|
125 m_contours.reset(); |
|
126 m_outline.flags = fillRule == Qt::WindingFill |
|
127 ? QT_FT_OUTLINE_NONE |
|
128 : QT_FT_OUTLINE_EVEN_ODD_FILL; |
|
129 m_subpath_start = 0; |
|
130 } |
|
131 |
|
132 void endOutline(); |
|
133 |
|
134 void clipElements(const QPointF *points, const QPainterPath::ElementType *types, int count); |
|
135 |
|
136 void convertElements(const QPointF *points, const QPainterPath::ElementType *types, int count); |
|
137 |
|
138 inline void moveTo(const QPointF &pt) { |
|
139 #ifdef QT_DEBUG_CONVERT |
|
140 printf("QOutlineMapper::moveTo() (%f, %f)\n", pt.x(), pt.y()); |
|
141 #endif |
|
142 closeSubpath(); |
|
143 m_subpath_start = m_elements.size(); |
|
144 m_elements << pt; |
|
145 m_element_types << QPainterPath::MoveToElement; |
|
146 } |
|
147 |
|
148 inline void lineTo(const QPointF &pt) { |
|
149 #ifdef QT_DEBUG_CONVERT |
|
150 printf("QOutlineMapper::lineTo() (%f, %f)\n", pt.x(), pt.y()); |
|
151 #endif |
|
152 m_elements.add(pt); |
|
153 m_element_types << QPainterPath::LineToElement; |
|
154 } |
|
155 |
|
156 inline void curveTo(const QPointF &cp1, const QPointF &cp2, const QPointF &ep) { |
|
157 #ifdef QT_DEBUG_CONVERT |
|
158 printf("QOutlineMapper::curveTo() (%f, %f)\n", ep.x(), ep.y()); |
|
159 #endif |
|
160 m_elements << cp1 << cp2 << ep; |
|
161 m_element_types << QPainterPath::CurveToElement |
|
162 << QPainterPath::CurveToDataElement |
|
163 << QPainterPath::CurveToDataElement; |
|
164 } |
|
165 |
|
166 inline void closeSubpath() { |
|
167 int element_count = m_elements.size(); |
|
168 if (element_count > 0) { |
|
169 if (m_elements.at(element_count-1) != m_elements.at(m_subpath_start)) { |
|
170 #ifdef QT_DEBUG_CONVERT |
|
171 printf(" - implicitly closing\n"); |
|
172 #endif |
|
173 // Put the object on the stack to avoid the odd case where |
|
174 // lineTo reallocs the databuffer and the QPointF & will |
|
175 // be invalidated. |
|
176 QPointF pt = m_elements.at(m_subpath_start); |
|
177 |
|
178 // only do lineTo if we have element_type array... |
|
179 if (m_element_types.size()) |
|
180 lineTo(pt); |
|
181 else |
|
182 m_elements << pt; |
|
183 |
|
184 } |
|
185 } |
|
186 } |
|
187 |
|
188 QT_FT_Outline *outline() { |
|
189 if (m_valid) |
|
190 return &m_outline; |
|
191 return 0; |
|
192 } |
|
193 |
|
194 QT_FT_Outline *convertPath(const QPainterPath &path); |
|
195 QT_FT_Outline *convertPath(const QVectorPath &path); |
|
196 |
|
197 void setCoordinateRounding(bool coordinateRounding) { m_round_coords = coordinateRounding; } |
|
198 |
|
199 inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? 0 : m_element_types.data(); } |
|
200 |
|
201 public: |
|
202 QDataBuffer<QPainterPath::ElementType> m_element_types; |
|
203 QDataBuffer<QPointF> m_elements; |
|
204 QDataBuffer<QPointF> m_elements_dev; |
|
205 QDataBuffer<QT_FT_Vector> m_points; |
|
206 QDataBuffer<char> m_tags; |
|
207 QDataBuffer<int> m_contours; |
|
208 |
|
209 QRect m_clip_rect; |
|
210 QDataBuffer<QPointF> m_polygon_dev; |
|
211 |
|
212 QRectF controlPointRect; // only valid after endOutline() |
|
213 |
|
214 QT_FT_Outline m_outline; |
|
215 uint m_txop; |
|
216 |
|
217 int m_subpath_start; |
|
218 |
|
219 // Matrix |
|
220 qreal m_m11; |
|
221 qreal m_m12; |
|
222 qreal m_m13; |
|
223 qreal m_m21; |
|
224 qreal m_m22; |
|
225 qreal m_m23; |
|
226 qreal m_m33; |
|
227 qreal m_dx; |
|
228 qreal m_dy; |
|
229 |
|
230 bool m_valid; |
|
231 |
|
232 private: |
|
233 bool m_round_coords; |
|
234 }; |
|
235 |
|
236 QT_END_NAMESPACE |
|
237 |
|
238 #endif // QOUTLINEMAPPER_P_H |