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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 examples 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 #include "svgalibpaintengine.h" |
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43 |
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44 #include <QColor> |
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45 #include <vga.h> |
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46 #include <vgagl.h> |
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47 |
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48 SvgalibPaintEngine::SvgalibPaintEngine() |
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49 { |
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50 } |
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51 |
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52 SvgalibPaintEngine::~SvgalibPaintEngine() |
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53 { |
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54 } |
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55 |
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56 //! [0] |
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57 bool SvgalibPaintEngine::begin(QPaintDevice *dev) |
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58 { |
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59 device = dev; |
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60 pen = Qt::NoPen; |
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61 simplePen = true; |
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62 brush = Qt::NoBrush; |
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63 simpleBrush = true; |
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64 matrix = QMatrix(); |
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65 simpleMatrix = true; |
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66 setClip(QRect(0, 0, device->width(), device->height())); |
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67 opaque = true; |
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68 aliased = true; |
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69 sourceOver = true; |
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70 |
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71 return QRasterPaintEngine::begin(dev); |
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72 } |
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73 //! [0] |
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74 |
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75 //! [1] |
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76 bool SvgalibPaintEngine::end() |
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77 { |
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78 gl_setclippingwindow(0, 0, device->width() - 1, device->height() - 1); |
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79 return QRasterPaintEngine::end(); |
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80 } |
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81 //! [1] |
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82 |
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83 //! [2] |
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84 void SvgalibPaintEngine::updateState(const QPaintEngineState &state) |
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85 { |
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86 QPaintEngine::DirtyFlags flags = state.state(); |
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87 |
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88 if (flags & DirtyTransform) { |
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89 matrix = state.matrix(); |
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90 simpleMatrix = (matrix.m12() == 0 && matrix.m21() == 0); |
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91 } |
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92 |
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93 if (flags & DirtyPen) { |
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94 pen = state.pen(); |
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95 simplePen = (pen.width() == 0 || pen.widthF() <= 1) |
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96 && (pen.style() == Qt::NoPen || pen.style() == Qt::SolidLine) |
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97 && (pen.color().alpha() == 255); |
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98 } |
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99 |
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100 if (flags & DirtyBrush) { |
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101 brush = state.brush(); |
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102 simpleBrush = (brush.style() == Qt::SolidPattern |
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103 || brush.style() == Qt::NoBrush) |
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104 && (brush.color().alpha() == 255); |
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105 } |
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106 |
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107 if (flags & DirtyClipRegion) |
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108 setClip(state.clipRegion()); |
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109 |
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110 if (flags & DirtyClipEnabled) { |
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111 clipEnabled = state.isClipEnabled(); |
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112 updateClip(); |
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113 } |
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114 |
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115 if (flags & DirtyClipPath) { |
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116 setClip(QRegion()); |
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117 simpleClip = false; |
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118 } |
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119 |
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120 if (flags & DirtyCompositionMode) { |
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121 const QPainter::CompositionMode m = state.compositionMode(); |
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122 sourceOver = (m == QPainter::CompositionMode_SourceOver); |
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123 } |
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124 |
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125 if (flags & DirtyOpacity) |
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126 opaque = (state.opacity() == 256); |
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127 |
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128 if (flags & DirtyHints) |
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129 aliased = !(state.renderHints() & QPainter::Antialiasing); |
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130 |
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131 QRasterPaintEngine::updateState(state); |
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132 } |
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133 //! [2] |
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134 |
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135 //! [3] |
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136 void SvgalibPaintEngine::setClip(const QRegion ®ion) |
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137 { |
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138 if (region.isEmpty()) |
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139 clip = QRect(0, 0, device->width(), device->height()); |
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140 else |
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141 clip = matrix.map(region) & QRect(0, 0, device->width(), device->height()); |
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142 clipEnabled = true; |
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143 updateClip(); |
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144 } |
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145 //! [3] |
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146 |
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147 //! [4] |
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148 void SvgalibPaintEngine::updateClip() |
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149 { |
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150 QRegion clipRegion = QRect(0, 0, device->width(), device->height()); |
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151 |
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152 if (!systemClip().isEmpty()) |
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153 clipRegion &= systemClip(); |
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154 if (clipEnabled) |
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155 clipRegion &= clip; |
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156 |
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157 simpleClip = (clipRegion.rects().size() <= 1); |
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158 |
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159 const QRect r = clipRegion.boundingRect(); |
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160 gl_setclippingwindow(r.left(), r.top(), |
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161 r.x() + r.width(), |
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162 r.y() + r.height()); |
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163 } |
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164 //! [4] |
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165 |
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166 //! [5] |
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167 void SvgalibPaintEngine::drawRects(const QRect *rects, int rectCount) |
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168 { |
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169 const bool canAccelerate = simplePen && simpleBrush && simpleMatrix |
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170 && simpleClip && opaque && aliased |
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171 && sourceOver; |
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172 if (!canAccelerate) { |
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173 QRasterPaintEngine::drawRects(rects, rectCount); |
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174 return; |
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175 } |
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176 |
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177 for (int i = 0; i < rectCount; ++i) { |
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178 const QRect r = matrix.mapRect(rects[i]); |
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179 if (brush != Qt::NoBrush) { |
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180 gl_fillbox(r.left(), r.top(), r.width(), r.height(), |
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181 brush.color().rgba()); |
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182 } |
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183 if (pen != Qt::NoPen) { |
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184 const int c = pen.color().rgba(); |
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185 gl_hline(r.left(), r.top(), r.right(), c); |
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186 gl_hline(r.left(), r.bottom(), r.right(), c); |
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187 gl_line(r.left(), r.top(), r.left(), r.bottom(), c); |
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188 gl_line(r.right(), r.top(), r.right(), r.bottom(), c); |
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189 } |
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190 } |
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191 } |
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192 //! [5] |