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1 /* |
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2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Graphics Extension Library header file |
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15 * |
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16 */ |
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17 |
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18 |
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19 #ifndef GFXFLATTENINGPATHITERATOR_H |
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20 #define GFXFLATTENINGPATHITERATOR_H |
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21 |
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22 #include <e32base.h> |
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23 #include <e32std.h> |
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24 |
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25 #include "GfxFloatFixPt.h" |
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26 #include "GfxPathIterator.h" |
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27 |
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28 |
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29 |
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30 class TGfxAffineTransform; |
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31 class MGfxShape; |
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32 |
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33 /** |
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34 * This class provides the methods to smooth a path. |
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35 * |
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36 * @lib Gfx2D.lib |
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37 * @since 1.0 |
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38 */ |
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39 class CGfxFlatteningPathIterator : public CGfxPathIterator |
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40 { |
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41 public: |
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42 |
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43 /** |
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44 * Two-phase constructor. |
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45 * |
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46 * @since 1.0 |
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47 * @param aSrc : source of path of flatten |
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48 * @param aAt : transform to apply. |
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49 * @param aFlatness : degree of flattening to apply. |
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50 * @param aLimit : maximum number of points used for flattening. |
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51 * @return |
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52 */ |
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53 static CGfxFlatteningPathIterator* NewL( MGfxShape* aSrc, |
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54 TGfxAffineTransform* aAt, |
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55 TInt32 aLimit ); |
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56 |
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57 |
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58 /** |
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59 * Destructor |
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60 * |
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61 * @since 1.0 |
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62 * @return |
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63 */ |
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64 virtual ~CGfxFlatteningPathIterator(); |
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65 |
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66 |
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67 /** |
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68 * Set the degree of flattening to apply. |
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69 * |
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70 * @since 1.0 |
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71 * @param aFlatness : degree of flattening. |
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72 * @return |
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73 */ |
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74 |
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75 void SetFlatness( TFloatFixPt& aFlatness ); |
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76 |
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77 /** |
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78 * Set the recursion level. |
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79 * |
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80 * @since 1.0 |
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81 * @param aLimit : recursion level. |
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82 * @return |
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83 */ |
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84 void SetRecursionLimit( TInt32 aLimit ); |
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85 |
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86 /** |
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87 * Get the flattening level.. |
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88 * |
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89 * @since 1.0 |
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90 * @param aLimit : recursion level. |
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91 * @return flattening value. |
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92 */ |
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93 |
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94 TFloatFixPt Flatness(); |
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95 |
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96 /** |
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97 * Get the recursion level. |
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98 * |
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99 * @since 1.0 |
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100 * @return the recursion level. |
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101 */ |
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102 TInt32 RecursionLimit(); |
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103 |
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104 |
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105 /** |
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106 * Get the points defining the current segment of iteration. |
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107 * |
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108 * @since 1.0 |
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109 * @param aCoords : array to store segment points. |
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110 * @return segment type. |
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111 */ |
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112 TGfxSegType CurrentSegment( TFloatFixPt* aCoords ); |
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113 |
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114 /** |
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115 * Determine wether the end has been reached. |
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116 * |
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117 * @since 1.0 |
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118 * @return true, if end of iterator reached. |
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119 */ |
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120 TBool IsDone(); |
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121 |
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122 /** |
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123 * Cycle to the next segment of this iterator. |
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124 * |
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125 * @since 1.0 |
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126 * @return |
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127 */ |
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128 void NextL(); |
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129 |
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130 |
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131 /** |
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132 * Create a polygon from iterator. This method is does nothing. |
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133 * |
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134 * @since 1.0 |
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135 * @return |
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136 */ |
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137 void PolygonizeL( CGfxEdgeListP* aRenderer, TInt aFlatness ); |
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138 |
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139 private: |
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140 |
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141 /** |
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142 * Constructor |
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143 * |
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144 * @since 1.0 |
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145 * @param aFlatness : degree of flattening to apply. |
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146 * @param aLimit : maximum number of points used for flattening. |
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147 * @return |
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148 */ |
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149 CGfxFlatteningPathIterator( TInt32 aLimit ); |
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150 |
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151 /** |
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152 * Second phase of constrction. |
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153 * |
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154 * @since 1.0 |
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155 * @param aSrc : source of path of flatten |
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156 * @param aAt : transform to apply. |
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157 * @return |
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158 */ |
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159 void ConstructL( MGfxShape* aSrc, |
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160 TGfxAffineTransform* aAt ); |
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161 |
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162 |
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163 /** |
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164 * Create a quadratic sub-curve. |
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165 * |
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166 * @since 1.0 |
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167 * @param aCtrlPoints : quadratic control points. |
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168 * @return |
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169 */ |
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170 void CreateSubcurveQuadL( RArray<TFloatFixPt>* aCtrlPoints ); |
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171 |
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172 /** |
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173 * Create a cubic sub-curve. |
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174 * |
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175 * @since 1.0 |
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176 * @param aCtrlPoints : cubic control points. |
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177 * @return |
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178 */ |
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179 void CreateSubcurveCubicL( RArray<TFloatFixPt>* aCtrlPoints ); |
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180 |
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181 private: |
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182 RArray<TFloatFixPt>* iCoords; |
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183 TInt32 iIdx; |
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184 CGfxPathIterator* iSrc; |
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185 TFloatFixPt iLastX; |
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186 TFloatFixPt iLastY; |
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187 TGfxSegType iSegType; |
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188 TBool iIsDone; |
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189 |
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190 TInt32 iLimit; |
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191 |
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192 TFloatFixPt iFlatness; |
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193 |
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194 |
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195 |
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196 }; |
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197 |
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198 #endif // GFXFLATTENINGPATHITERATOR_H |