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1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include "swdirectgdiengine.h" |
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17 #include "swdirectgdipolygon.h" |
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18 |
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19 /** |
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20 @see MDirectGdiEngine::DrawLine() |
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21 */ |
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22 void CSwDirectGdiEngine::DrawLine(const TPoint& aPt1,const TPoint& aPt2) |
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23 { |
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24 DoDrawLine(aPt1,aPt2,ETrue); |
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25 } |
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26 |
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27 /** |
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28 @see MDirectGdiEngine::DrawLineTo() |
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29 */ |
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30 void CSwDirectGdiEngine::DrawLineTo(const TPoint& aPoint) |
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31 { |
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32 DrawLine(iLinePosition,aPoint); |
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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 @see MDirectGdiEngine::DrawLineBy() |
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38 */ |
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39 void CSwDirectGdiEngine::DrawLineBy(const TPoint& aVector) |
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40 { |
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41 DrawLine(iLinePosition,iLinePosition + aVector); |
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42 } |
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43 |
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44 /** |
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45 @see MDirectGdiEngine::DrawPolyLine() |
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46 |
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47 @panic DGDIAdapter 27, if the passed point list has too few points (debug only). |
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48 */ |
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49 void CSwDirectGdiEngine::DrawPolyLine(const TArray<TPoint>& aPointList) |
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50 { |
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51 DrawPolyLineNoEndPoint(aPointList); |
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52 |
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53 if (iPenStyle == DirectGdi::ESolidPen) |
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54 { |
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55 Plot(aPointList[aPointList.Count()-1]); |
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56 } |
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57 } |
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58 |
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59 /** |
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60 @see MDirectGdiEngine::DrawPolyLineNoEndPoint() |
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61 |
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62 @panic DGDIAdapter 27, if the passed point list has too few points (debug only). |
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63 */ |
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64 void CSwDirectGdiEngine::DrawPolyLineNoEndPoint(const TArray<TPoint>& aPointList) |
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65 { |
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66 GRAPHICS_ASSERT_DEBUG(aPointList.Count() > 0, EDirectGdiPanicInvalidPointArray); |
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67 |
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68 const TInt vertexes = aPointList.Count()-1; |
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69 |
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70 for (TInt count = 0; count < vertexes; count++) |
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71 { |
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72 DrawLine(aPointList[count], aPointList[count + 1]); |
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73 } |
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74 } |
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75 |
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76 /** |
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77 @see MDirectGdiEngine::DrawPolygon() |
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78 */ |
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79 void CSwDirectGdiEngine::DrawPolygon(const TArray<TPoint>& aPointList, DirectGdi::TFillRule aFillRule) |
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80 { |
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81 const TInt numpoints = aPointList.Count(); |
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82 |
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83 if (iBrushStyle != DirectGdi::ENullBrush) |
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84 { |
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85 TRect pointrect(0,0,0,0); |
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86 TRect truncrect(0,0,0,0); |
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87 TBool largepolygon = EFalse; |
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88 |
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89 for (TInt count = 0; count < numpoints; count++) |
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90 { |
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91 pointrect.iTl = aPointList[count] + iOrigin; |
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92 truncrect.iTl = pointrect.iTl; |
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93 TruncateRect(truncrect); |
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94 |
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95 if (pointrect.iTl != truncrect.iTl) |
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96 { |
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97 largepolygon = ETrue; |
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98 break; |
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99 } |
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100 } |
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101 |
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102 if (largepolygon) |
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103 { |
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104 PolyFillLarge(&aPointList, aFillRule); |
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105 } |
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106 else |
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107 { |
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108 PolyFill(&aPointList, aFillRule); |
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109 } |
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110 } |
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111 |
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112 if (iPenStyle != DirectGdi::ENullPen) |
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113 { |
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114 if (iPenSize.iWidth > 0 && iPenSize.iHeight > 0) |
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115 { |
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116 PolyOutline(&aPointList); |
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117 } |
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118 } |
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119 } |
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120 |
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121 /** |
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122 Draws a straight line from the start to the end position using current pen size, colour and style. |
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123 |
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124 @param aPt1 Start position. |
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125 @param aPt2 End position. |
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126 @param aDrawStartPoint If ETrue, draws the first pixel of the line. |
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127 |
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128 @post The internal drawing position is set to the line's endpoint. |
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129 @see CSwDirectGdiEngine::DrawLine() |
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130 */ |
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131 void CSwDirectGdiEngine::DoDrawLine(TPoint aPt1, TPoint aPt2, TBool aDrawStartPoint) |
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132 { |
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133 iLinePosition = aPt2; |
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134 |
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135 if ((aPt1 == aPt2)) |
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136 { |
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137 return; |
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138 } |
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139 |
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140 aPt1 += iOrigin; |
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141 aPt2 += iOrigin; |
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142 |
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143 TRect temp(aPt1,aPt2); |
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144 temp.Normalize(); |
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145 temp.Grow(iPenSize.iWidth, iPenSize.iHeight); |
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146 |
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147 TRect screenRect; |
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148 iDrawDevice->GetDrawRect(screenRect); |
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149 screenRect.Grow(iPenSize.iWidth, iPenSize.iHeight); |
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150 |
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151 const TInt dotParam = iDotParam; |
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152 TPoint plotpt(0,0); |
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153 const CGraphicsContext::TDrawMode drawMode = GcDrawMode(iDrawMode); |
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154 |
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155 TRect clipRect(0,0,0,0); |
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156 for (TInt count = 0; count < iDefaultRegionPtr->Count(); count++) |
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157 { |
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158 iDotParam = dotParam; |
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159 clipRect = (*iDefaultRegionPtr)[count]; |
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160 |
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161 if (!clipRect.Intersects(temp)) |
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162 { |
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163 TLinearDDA line; |
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164 line.Construct(aPt1,aPt2); |
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165 line.JumpToRect(screenRect); |
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166 if (iPenStyle != DirectGdi::ESolidPen) |
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167 { |
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168 while (!line.SingleStep(plotpt)) |
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169 { |
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170 iDotParam += iDotDirection; |
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171 } |
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172 } |
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173 continue; |
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174 } |
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175 |
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176 clipRect.Intersection(temp); |
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177 |
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178 if ((iPenSize.iWidth > 1 || iPenSize.iHeight > 1) && (iPenStyle == DirectGdi::ESolidPen)) // wide solid line |
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179 { |
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180 DoDrawSolidWideLine(aPt1, aPt2, aDrawStartPoint, screenRect, clipRect); |
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181 } |
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182 else if (iPenSize.iWidth > 1 || iPenSize.iHeight > 1) // dotted line |
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183 { |
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184 DoDrawDottedWideLine(aPt1, aPt2, aDrawStartPoint, screenRect, clipRect); |
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185 } |
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186 else if (iPenStyle != DirectGdi::ESolidPen) // single pixel dotted line |
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187 { |
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188 TLinearDDA line; |
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189 line.Construct(aPt1,aPt2); |
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190 line.JumpToRect(screenRect); |
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191 |
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192 iDotParam = dotParam; |
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193 if (!aDrawStartPoint) |
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194 { |
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195 line.SingleStep(plotpt); |
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196 iDotParam += iDotDirection; |
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197 } |
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198 |
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199 while (!line.SingleStep(plotpt)) |
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200 { |
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201 PenDrawClipped(plotpt, clipRect); |
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202 iDotParam += iDotDirection; |
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203 } |
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204 } |
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205 else if (aPt1.iY == aPt2.iY && |
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206 (aPt1.iY >= clipRect.iTl.iY && |
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207 aPt1.iY < clipRect.iBr.iY)) |
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208 { // single pixel solid horizontal line |
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209 TInt start = Min(aPt1.iX,aPt2.iX + 1); |
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210 TInt length = Abs(aPt2.iX - aPt1.iX); |
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211 |
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212 if (!aDrawStartPoint) |
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213 { |
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214 if (aPt1.iX < aPt2.iX) |
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215 { |
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216 start++; |
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217 } |
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218 else |
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219 { |
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220 length--; |
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221 } |
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222 } |
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223 if (start < clipRect.iTl.iX) |
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224 { |
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225 length += start - clipRect.iTl.iX; |
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226 start = clipRect.iTl.iX; |
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227 } |
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228 if ( (start + length) > clipRect.iBr.iX) |
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229 { |
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230 length = clipRect.iBr.iX - start; |
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231 } |
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232 |
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233 if (length > 0) |
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234 { |
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235 iDrawDevice->WriteRgbMulti(start, aPt1.iY, length, 1, iPenColor, drawMode); |
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236 } |
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237 } |
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238 else if (aPt1.iX == aPt2.iX && (aPt1.iX >= clipRect.iTl.iX && aPt1.iX < clipRect.iBr.iX)) |
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239 { // single pixel solid vertical line |
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240 TInt start = Min(aPt1.iY,aPt2.iY + 1); |
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241 TInt length = Abs(aPt2.iY - aPt1.iY); |
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242 |
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243 if (!aDrawStartPoint) |
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244 { |
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245 if (aPt1.iY < aPt2.iY) |
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246 { |
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247 start++; |
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248 } |
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249 else |
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250 { |
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251 length--; |
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252 } |
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253 } |
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254 |
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255 if (start < clipRect.iTl.iY) |
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256 { |
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257 length += start - clipRect.iTl.iY; |
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258 start = clipRect.iTl.iY; |
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259 } |
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260 if (start + length > clipRect.iBr.iY) |
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261 { |
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262 length = clipRect.iBr.iY - start; |
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263 } |
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264 |
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265 if (length > 0) |
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266 { |
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267 iDrawDevice->WriteRgbMulti(aPt1.iX,start,1,length,iPenColor, drawMode); |
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268 } |
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269 } |
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270 else |
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271 { // single pixel solid diagonal line |
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272 TLinearDDA line; |
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273 line.Construct(aPt1,aPt2); |
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274 |
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275 line.JumpToRect(screenRect); |
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276 |
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277 if (!aDrawStartPoint) |
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278 { |
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279 line.SingleStep(plotpt); |
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280 } |
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281 |
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282 while (!line.SingleStep(plotpt)) |
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283 { |
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284 if (clipRect.Contains(plotpt)) |
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285 { |
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286 iDrawDevice->WriteRgb(plotpt.iX, plotpt.iY, iPenColor, drawMode); |
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287 } |
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288 } |
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289 } |
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290 |
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291 iDrawDevice->UpdateRegion(clipRect); |
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292 } |
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293 } |
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294 |
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295 /** |
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296 Draws a straight line from the start to the end position using pen sizes larger than 1x1 pixel. |
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297 |
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298 @param aPt1 Start position. |
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299 @param aPt2 End position. |
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300 @param aDrawStartPoint If ETrue, draws the first pixel of the line. |
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301 @param aScreenRect Rectangle representing the screen boundary. |
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302 @param aClipRect The rectangle to which the line is clipped. |
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303 @see CSwDirectGdiEngine::DrawLine() |
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304 */ |
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305 void CSwDirectGdiEngine::DoDrawSolidWideLine(const TPoint& aPt1, |
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306 const TPoint& aPt2, |
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307 TBool aDrawStartPoint, |
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308 const TRect& aScreenRect, |
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309 TRect aClipRect) |
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310 { |
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311 CFbsDrawDevice* drawDevice = iDrawDevice; |
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312 |
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313 TLinearDDA line; |
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314 line.Construct(aPt1,aPt2); |
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315 |
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316 TPoint plotpt(aPt1); |
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317 line.JumpToRect(aScreenRect); |
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318 if (!aDrawStartPoint) |
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319 line.SingleStep(plotpt); |
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320 |
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321 TInt* deferred = NULL; |
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322 const TInt doubleheight = iPenSize.iHeight << 1; |
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323 |
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324 if (iPenArray) |
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325 { |
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326 deferred = new TInt[doubleheight]; |
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327 } |
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328 |
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329 if (!iPenArray || !deferred) |
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330 { |
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331 while (!line.SingleStep(plotpt)) |
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332 PenDrawClipped(plotpt, aClipRect); |
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333 } |
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334 else |
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335 { |
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336 const TBool down = (aPt2.iY >= aPt1.iY); |
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337 |
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338 for (TInt fillcount = 0; fillcount < doubleheight; ) |
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339 { |
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340 deferred[fillcount++] = KMaxTInt; |
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341 deferred[fillcount++] = KMinTInt; |
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342 } |
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343 |
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344 TInt nextline = 0; |
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345 TInt nexty = plotpt.iY; |
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346 if (down) |
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347 { |
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348 nexty -= ((iPenSize.iHeight - 1) >> 1); |
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349 } |
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350 else |
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351 { |
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352 nexty += (iPenSize.iHeight >> 1); |
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353 } |
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354 |
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355 TInt lasty = plotpt.iY; |
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356 |
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357 while (!line.SingleStep(plotpt)) |
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358 { |
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359 if (plotpt.iY != lasty) |
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360 { |
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361 if (nexty >= aClipRect.iTl.iY && nexty < aClipRect.iBr.iY) |
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362 { |
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363 TInt left = deferred[nextline]; |
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364 TInt right = deferred[nextline + 1]; |
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365 if (left < aClipRect.iTl.iX) |
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366 { |
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367 left = aClipRect.iTl.iX; |
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368 } |
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369 if (right >= aClipRect.iBr.iX) |
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370 { |
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371 right = aClipRect.iBr.iX - 1; |
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372 } |
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373 |
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374 if (left <= right) |
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375 { |
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376 drawDevice->WriteRgbMulti(left,nexty,right - left + 1,1,iPenColor,CGraphicsContext::EDrawModePEN); |
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377 } |
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378 } |
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379 |
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380 if (down) |
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381 { |
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382 nexty++; |
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383 } |
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384 else |
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385 { |
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386 nexty--; |
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387 } |
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388 |
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389 lasty = plotpt.iY; |
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390 deferred[nextline++] = KMaxTInt; |
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391 deferred[nextline++] = KMinTInt; |
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392 if (nextline == doubleheight) |
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393 { |
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394 nextline = 0; |
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395 } |
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396 } |
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397 |
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398 PenDrawDeferred(plotpt,deferred,nextline); |
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399 } |
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400 |
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401 for (TInt restofline = 0; restofline < doubleheight; restofline += 2,nextline += 2) |
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402 { |
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403 if (nextline == doubleheight) |
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404 nextline = 0; |
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405 |
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406 if (nexty >= aClipRect.iTl.iY && nexty < aClipRect.iBr.iY) |
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407 { |
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408 TInt left = deferred[nextline]; |
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409 TInt right = deferred[nextline+1]; |
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410 if (left < aClipRect.iTl.iX) |
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411 { |
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412 left = aClipRect.iTl.iX; |
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413 } |
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414 if (right >= aClipRect.iBr.iX) |
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415 { |
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416 right = aClipRect.iBr.iX-1; |
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417 } |
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418 |
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419 if (left <= right) |
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420 { |
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421 drawDevice->WriteRgbMulti(left,nexty,right - left + 1,1,iPenColor,CGraphicsContext::EDrawModePEN); |
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422 } |
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423 } |
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424 |
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425 if (down) |
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426 { |
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427 nexty++; |
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428 } |
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429 else |
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430 { |
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431 nexty--; |
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432 } |
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433 } |
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434 |
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435 delete[] deferred; |
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436 } |
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437 } |
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438 |
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439 /** |
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440 Draws a dotted straight line from the start to the end position using pen sizes larger than 1x1 pixel. |
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441 |
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442 @param aPt1 Start position. |
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443 @param aPt2 End position. |
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444 @param aDrawStartPoint If ETrue, draws the first pixel of the line. |
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445 @param aScreenRect Rectangle representing the screen boundary. |
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446 @param aClipRect The rectangle to which the line is clipped. |
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447 @see CSwDirectGdiEngine::DrawLine() |
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448 */ |
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449 void CSwDirectGdiEngine::DoDrawDottedWideLine(const TPoint& aPt1, |
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450 const TPoint& aPt2, |
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451 TBool aDrawStartPoint, |
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452 const TRect& aScreenRect, |
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453 TRect aClipRect) |
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454 { |
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455 TLinearDDA line; |
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456 line.Construct(aPt1,aPt2); |
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457 |
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458 TPoint plotpt(aPt1); |
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459 line.JumpToRect(aScreenRect); |
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460 if (!aDrawStartPoint) |
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461 { |
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462 line.SingleStep(plotpt); |
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463 iDotParam += iDotDirection; |
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464 } |
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465 |
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466 const TInt maxdim = Max(iPenSize.iWidth, iPenSize.iHeight); |
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467 |
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468 TBool done = EFalse; |
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469 while (!done) |
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470 { |
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471 while (!done && !(iDotMask & (1 << ((iDotParam / maxdim) % iDotLength)))) |
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472 { |
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473 done = line.SingleStep(plotpt); |
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474 iDotParam += iDotDirection; |
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475 } |
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476 |
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477 TPoint startdash(plotpt); |
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478 TPoint enddash(plotpt); |
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479 |
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480 while (!done && (iDotMask & (1 << ((iDotParam / maxdim) % iDotLength)))) |
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481 { |
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482 enddash = plotpt; |
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483 done = line.SingleStep(plotpt); |
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484 iDotParam += iDotDirection; |
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485 } |
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486 |
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487 DoDrawSolidWideLine(startdash,enddash,ETrue,aScreenRect,aClipRect); |
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488 } |
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489 } |
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490 |
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491 /** |
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492 Fills a polygon defined using an array of points. The first point in the array defines the |
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493 start of the first side of the polygon. The final side of the polygon is drawn using the last point |
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494 from the array. The area is filled with the current brush settings. |
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495 |
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496 Self-crossing polygons are filled according to the specified fill rule. |
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497 |
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498 @param aPointList Array of points specifying the vertices of the polygon. |
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499 @param aFillRule Polygon filling rule. |
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500 */ |
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501 void CSwDirectGdiEngine::PolyFill(const TArray<TPoint>* aPointList, DirectGdi::TFillRule aFillRule) |
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502 { |
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503 TBool exists; |
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504 TInt scanline; |
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505 TInt pixelRunStart; |
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506 TInt pixelRunEnd; |
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507 |
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508 TRect clipRect(0,0,0,0); |
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509 const TInt limit = iDefaultRegionPtr->Count(); |
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510 for (TInt count = 0; count < limit; count++) |
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511 { |
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512 clipRect = (*iDefaultRegionPtr)[count]; |
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513 CSwDirectGdiPolygonFiller polyfill; |
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514 polyfill.Construct(aPointList,aFillRule); |
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515 |
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516 for(polyfill.GetNextPixelRun(exists,scanline,pixelRunStart,pixelRunEnd);exists; |
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517 polyfill.GetNextPixelRun(exists,scanline,pixelRunStart,pixelRunEnd)) |
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518 { |
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519 TPoint start(pixelRunStart, scanline); |
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520 TPoint end(pixelRunEnd, scanline); |
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521 start += iOrigin; |
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522 end += iOrigin; |
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523 ClipFillLine(start,end,clipRect); |
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524 } |
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525 |
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526 polyfill.Reset(); |
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527 iDrawDevice->UpdateRegion(clipRect); |
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528 } |
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529 } |
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530 |
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531 |
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532 /** |
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533 Fills a polygon defined using an array of points. The first point in the array defines the |
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534 start of the first side of the polygon. The final side of the polygon is drawn using the last point |
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535 from the array. The area is filled with the current brush settings. Optimized for polygons that are |
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536 much larger than the screen. |
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537 |
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538 Self-crossing polygons are filled according to the specified fill rule. |
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539 |
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540 @param aPointList Array of points specifying the vertices of the polygon. |
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541 @param aFillRule Polygon filling rule. |
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542 */ |
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543 void CSwDirectGdiEngine::PolyFillLarge(const TArray<TPoint>* aPointList, DirectGdi::TFillRule aFillRule) |
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544 { |
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545 TBool exists; |
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546 TInt pixelRunStart; |
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547 TInt pixelRunEnd; |
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548 |
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549 TRect clipRect(0,0,0,0); |
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550 const TInt limit = iDefaultRegionPtr->Count(); |
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551 for (TInt count = 0; count < limit; count++) |
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552 { |
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553 clipRect = (*iDefaultRegionPtr)[count]; |
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554 CSwDirectGdiPolygonFiller polyfill; |
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555 polyfill.Construct(aPointList,aFillRule,CSwDirectGdiPolygonFiller::EGetPixelRunsSequentiallyForSpecifiedScanLines); |
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556 TInt clipRectOffsetStart = clipRect.iTl.iY - iOrigin.iY; |
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557 TInt clipRectOffsetEnd = clipRect.iBr.iY - iOrigin.iY; |
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558 |
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559 for (TInt scanline = clipRectOffsetStart; scanline < clipRectOffsetEnd; scanline++) |
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560 { |
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561 polyfill.GetNextPixelRunOnSpecifiedScanLine(exists,scanline,pixelRunStart,pixelRunEnd); |
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562 while (exists) |
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563 { |
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564 TPoint start(pixelRunStart,scanline); |
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565 TPoint end(pixelRunEnd,scanline); |
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566 start += iOrigin; |
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567 end += iOrigin; |
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568 ClipFillLine(start,end,clipRect); |
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569 polyfill.GetNextPixelRunOnSpecifiedScanLine(exists,scanline,pixelRunStart,pixelRunEnd); |
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570 } |
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571 } |
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572 |
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573 polyfill.Reset(); |
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574 iDrawDevice->UpdateRegion(clipRect); |
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575 } |
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576 } |
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577 |
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578 /** |
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579 Draws a polygon defined by an array of points using the current pen settings. The first point in the array defines the |
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580 start of the first side of the polygon. The final side of the polygon is drawn using the last point |
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581 from the array, and the line is drawn to the start point of the first side. |
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582 |
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583 @param aPointList List of points specifying the vertices of the polygon. |
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584 */ |
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585 void CSwDirectGdiEngine::PolyOutline(const TArray<TPoint>* aPointList) |
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586 { |
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587 const TInt vertexes = aPointList->Count(); |
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588 |
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589 for (TInt count = 0; count < vertexes; count++) |
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590 { |
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591 TPoint point1((*aPointList)[count]); |
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592 TPoint point2((*aPointList)[(count + 1) % vertexes]); |
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593 |
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594 if (point1.iY < point2.iY) |
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595 { |
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596 DoDrawLine(point1,point2,ETrue); |
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597 } |
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598 else |
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599 { |
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600 iDotDirection = -1; |
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601 iDotParam += Max(Abs(point2.iX - point1.iX),Abs(point2.iY - point1.iY)); |
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602 const TInt dotParam = iDotParam; |
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603 DoDrawLine(point2,point1,EFalse); |
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604 |
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605 if (Abs(point2.iX - point1.iX) > Abs(point2.iY - point1.iY)) |
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606 { |
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607 if (iPenStyle == DirectGdi::ESolidPen || (iDotMask & (1 << ((iDotParam / iPenSize.iWidth) % iDotLength)))) |
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608 DoPlot((*aPointList)[count]); |
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609 } |
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610 else |
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611 { |
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612 if (iPenStyle == DirectGdi::ESolidPen || (iDotMask & (1 << ((iDotParam / iPenSize.iHeight) % iDotLength)))) |
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613 DoPlot((*aPointList)[count]); |
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614 } |
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615 |
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616 iDotDirection = 1; |
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617 iDotParam = dotParam; |
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618 } |
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619 } |
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620 } |