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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QPAINTERPATH_P_H |
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43 #define QPAINTERPATH_P_H |
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44 |
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45 // |
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46 // W A R N I N G |
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47 // ------------- |
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48 // |
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49 // This file is not part of the Qt API. It exists for the convenience |
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50 // of other Qt classes. This header file may change from version to |
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51 // version without notice, or even be removed. |
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52 // |
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53 // We mean it. |
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54 // |
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55 |
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56 #include "QtGui/qpainterpath.h" |
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57 #include "QtGui/qregion.h" |
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58 #include "QtCore/qlist.h" |
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59 #include "QtCore/qvarlengtharray.h" |
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60 |
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61 #include <qdebug.h> |
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62 |
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63 #include <private/qvectorpath_p.h> |
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64 #include <private/qstroker_p.h> |
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65 |
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66 QT_BEGIN_NAMESPACE |
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67 |
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68 class QPainterPathStrokerPrivate |
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69 { |
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70 public: |
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71 QPainterPathStrokerPrivate(); |
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72 |
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73 QStroker stroker; |
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74 QVector<qfixed> dashPattern; |
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75 qreal dashOffset; |
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76 }; |
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77 |
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78 class QPolygonF; |
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79 class QVectorPathConverter; |
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80 |
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81 class QVectorPathConverter |
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82 { |
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83 public: |
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84 QVectorPathConverter(const QVector<QPainterPath::Element> &path, uint fillRule) |
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85 : pathData(path, fillRule), |
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86 path(pathData.points.data(), path.size(), |
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87 pathData.elements.data(), pathData.flags) {} |
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88 |
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89 const QVectorPath &vectorPath() { |
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90 return path; |
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91 } |
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92 |
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93 struct QVectorPathData { |
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94 QVectorPathData(const QVector<QPainterPath::Element> &path, uint fillRule) |
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95 : elements(path.size()), |
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96 points(path.size() * 2), |
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97 flags(0) |
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98 { |
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99 int ptsPos = 0; |
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100 for (int i=0; i<path.size(); ++i) { |
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101 const QPainterPath::Element &e = path.at(i); |
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102 elements[i] = e.type; |
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103 points[ptsPos++] = e.x; |
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104 points[ptsPos++] = e.y; |
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105 if (e.type == QPainterPath::CurveToElement) |
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106 flags |= QVectorPath::CurvedShapeHint; |
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107 } |
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108 |
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109 if (fillRule == Qt::WindingFill) |
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110 flags |= QVectorPath::WindingFill; |
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111 else |
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112 flags |= QVectorPath::OddEvenFill; |
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113 |
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114 } |
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115 QVarLengthArray<QPainterPath::ElementType> elements; |
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116 QVarLengthArray<qreal> points; |
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117 uint flags; |
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118 }; |
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119 |
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120 QVectorPathData pathData; |
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121 QVectorPath path; |
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122 |
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123 private: |
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124 Q_DISABLE_COPY(QVectorPathConverter) |
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125 }; |
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126 |
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127 class QPainterPathData : public QPainterPathPrivate |
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128 { |
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129 public: |
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130 QPainterPathData() : |
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131 cStart(0), fillRule(Qt::OddEvenFill), |
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132 dirtyBounds(false), dirtyControlBounds(false), |
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133 pathConverter(0) |
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134 { |
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135 ref = 1; |
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136 require_moveTo = false; |
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137 } |
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138 |
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139 QPainterPathData(const QPainterPathData &other) : |
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140 QPainterPathPrivate(), cStart(other.cStart), fillRule(other.fillRule), |
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141 dirtyBounds(other.dirtyBounds), bounds(other.bounds), |
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142 dirtyControlBounds(other.dirtyControlBounds), |
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143 controlBounds(other.controlBounds), |
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144 pathConverter(0) |
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145 { |
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146 ref = 1; |
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147 require_moveTo = false; |
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148 elements = other.elements; |
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149 } |
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150 |
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151 ~QPainterPathData() { |
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152 delete pathConverter; |
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153 } |
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154 |
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155 inline bool isClosed() const; |
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156 inline void close(); |
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157 inline void maybeMoveTo(); |
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158 |
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159 const QVectorPath &vectorPath() { |
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160 if (!pathConverter) |
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161 pathConverter = new QVectorPathConverter(elements, fillRule); |
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162 return pathConverter->path; |
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163 } |
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164 |
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165 int cStart; |
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166 Qt::FillRule fillRule; |
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167 |
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168 bool require_moveTo; |
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169 |
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170 bool dirtyBounds; |
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171 QRectF bounds; |
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172 bool dirtyControlBounds; |
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173 QRectF controlBounds; |
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174 |
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175 QVectorPathConverter *pathConverter; |
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176 }; |
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177 |
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178 |
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179 inline const QPainterPath QVectorPath::convertToPainterPath() const |
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180 { |
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181 QPainterPath path; |
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182 path.ensureData(); |
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183 QPainterPathData *data = path.d_func(); |
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184 data->elements.reserve(m_count); |
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185 int index = 0; |
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186 data->elements[0].x = m_points[index++]; |
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187 data->elements[0].y = m_points[index++]; |
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188 |
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189 if (m_elements) { |
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190 data->elements[0].type = m_elements[0]; |
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191 for (int i=1; i<m_count; ++i) { |
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192 QPainterPath::Element element; |
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193 element.x = m_points[index++]; |
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194 element.y = m_points[index++]; |
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195 element.type = m_elements[i]; |
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196 data->elements << element; |
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197 } |
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198 } else { |
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199 data->elements[0].type = QPainterPath::MoveToElement; |
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200 for (int i=1; i<m_count; ++i) { |
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201 QPainterPath::Element element; |
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202 element.x = m_points[index++]; |
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203 element.y = m_points[index++]; |
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204 element.type = QPainterPath::LineToElement; |
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205 data->elements << element; |
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206 } |
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207 } |
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208 |
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209 if (m_hints & OddEvenFill) |
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210 data->fillRule = Qt::OddEvenFill; |
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211 else |
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212 data->fillRule = Qt::WindingFill; |
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213 return path; |
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214 } |
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215 |
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216 void Q_GUI_EXPORT qt_find_ellipse_coords(const QRectF &r, qreal angle, qreal length, |
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217 QPointF* startPoint, QPointF *endPoint); |
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218 |
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219 inline bool QPainterPathData::isClosed() const |
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220 { |
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221 const QPainterPath::Element &first = elements.at(cStart); |
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222 const QPainterPath::Element &last = elements.last(); |
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223 return first.x == last.x && first.y == last.y; |
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224 } |
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225 |
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226 inline void QPainterPathData::close() |
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227 { |
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228 Q_ASSERT(ref == 1); |
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229 require_moveTo = true; |
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230 const QPainterPath::Element &first = elements.at(cStart); |
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231 QPainterPath::Element &last = elements.last(); |
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232 if (first.x != last.x || first.y != last.y) { |
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233 if (qFuzzyCompare(first.x, last.x) && qFuzzyCompare(first.y, last.y)) { |
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234 last.x = first.x; |
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235 last.y = first.y; |
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236 } else { |
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237 QPainterPath::Element e = { first.x, first.y, QPainterPath::LineToElement }; |
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238 elements << e; |
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239 } |
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240 } |
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241 } |
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242 |
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243 inline void QPainterPathData::maybeMoveTo() |
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244 { |
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245 if (require_moveTo) { |
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246 QPainterPath::Element e = elements.last(); |
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247 e.type = QPainterPath::MoveToElement; |
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248 elements.append(e); |
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249 require_moveTo = false; |
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250 } |
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251 } |
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252 |
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253 #define KAPPA 0.5522847498 |
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254 |
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255 |
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256 QT_END_NAMESPACE |
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257 |
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258 #endif // QPAINTERPATH_P_H |