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1 /* |
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2 * Copyright (c) 2003 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: SVG Implementation source 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 #include "SVGPathDataParser.h" |
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20 #include "SVGPointLexer.h" |
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21 |
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22 #include "GfxFloatFixPt.h" |
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23 #include "GfxAffineTransform.h" |
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24 #include "GfxFlatteningPathIterator.h" |
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25 |
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26 |
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27 // --------------------------------------------------------------------------- |
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28 // |
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29 // --------------------------------------------------------------------------- |
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30 void TSvgPathDataParser::ParsePathData( const TDesC& aData, |
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31 CGfxGeneralPath* aPath ) |
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32 { |
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33 |
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34 TRAPD( error, ParsePathDataL( aData, aPath ) ); |
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35 if ( error != KErrNone ) |
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36 { |
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37 // error processing |
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38 return; |
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39 } |
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40 } |
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41 |
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42 // --------------------------------------------------------------------------- |
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43 // |
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44 // --------------------------------------------------------------------------- |
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45 void TSvgPathDataParser::ParsePathDataL( const TDesC& aData, |
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46 CGfxGeneralPath* aPath ) |
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47 { |
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48 TUint8 lPrevCom = '\0'; |
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49 TFloatFixPt xy[6]; |
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50 TInt32 rslt = ETrue; |
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51 TUint8 com; |
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52 TUint8 lPrevCom2 = '\0'; |
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53 |
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54 TSvgPointLexer svgplex( aData ); |
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55 |
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56 TFloatFixPt KZero; |
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57 TFloatFixPt KMinVal = 0.01f; |
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58 TFloatFixPt KOne( KFloatFixOne ); |
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59 |
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60 while ( svgplex.GetCommand ( com ) ) |
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61 { |
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62 |
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63 // Reset for command procesing |
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64 if( com == '\0' ) |
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65 { |
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66 if( lPrevCom == 'z' ||lPrevCom == 'Z' ) |
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67 { |
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68 aPath->Reset(); |
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69 break ; |
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70 } |
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71 // As per 1.2 spec 8.3.2 The "moveto" commands |
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72 // If a 'moveto' is followed by multiple pairs of coordinates without explicit commands, |
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73 // the subsequent pairs shall be treated as implicit 'lineto' commands. |
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74 |
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75 else if( lPrevCom == 'm') |
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76 { |
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77 com = 'l'; |
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78 } |
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79 else if( lPrevCom == 'M' ) |
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80 { |
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81 com = 'L'; |
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82 } |
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83 else |
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84 { |
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85 com = lPrevCom; |
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86 } |
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87 } |
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88 else |
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89 { |
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90 lPrevCom = com; |
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91 } |
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92 |
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93 switch ( com ) |
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94 { |
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95 case 'M': |
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96 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) ); |
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97 if (rslt && lPrevCom2 == 'M') |
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98 { |
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99 //AJD do we want to remove this |
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100 // i.e. d="M 20 20 M 10 10 L 15 15 |
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101 // has a bounding box of 5,5,10,10 or 10,10,10,10 |
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102 //aPath->RemoveLastPathCommand(); |
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103 } |
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104 if(rslt) |
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105 { |
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106 aPath->MoveToL( xy[0], xy[1], ETrue ); |
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107 } |
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108 break; |
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109 case 'm': |
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110 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) ); |
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111 // added to change values from 0.0 to 0.01f if both the co-oridnates |
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112 // are having value 0.0. |
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113 // fix for bug "CGSR-78X9V2" |
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114 if(xy[0] == KZero && xy[1] == KZero) |
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115 { |
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116 xy[0] = KMinVal; |
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117 xy[1] = KMinVal; |
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118 } |
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119 if(rslt) |
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120 { |
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121 aPath->MoveToL( xy[0], xy[1], EFalse ); |
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122 } |
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123 |
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124 break; |
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125 case 'L': |
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126 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) ); |
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127 if(rslt) |
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128 { |
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129 aPath->LineToL( xy[0], xy[1], ETrue ); |
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130 } |
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131 break; |
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132 case 'H': |
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133 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) ); |
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134 if(rslt) |
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135 { |
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136 aPath->HorizonToL( xy[0], ETrue ); |
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137 } |
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138 break; |
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139 case 'V': |
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140 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) ); |
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141 if(rslt) |
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142 { |
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143 aPath->VertToL( xy[0], ETrue ); |
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144 } |
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145 break; |
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146 case 'l': |
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147 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) ); |
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148 // added to change values from 0.0 to 0.01f if both the co-oridnates |
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149 // are having value 0.0. |
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150 // fix for bug "CGSR-78X9V2" |
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151 if(xy[0] == KZero && xy[1] == KZero) |
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152 { |
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153 xy[0] = KMinVal; |
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154 xy[1] = KMinVal; |
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155 } |
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156 if(rslt) |
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157 { |
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158 aPath->LineToL( xy[0], xy[1], EFalse ); |
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159 } |
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160 break; |
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161 case 'h': |
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162 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) ); |
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163 // added to change values from 0.0 to 0.01f if both the co-oridnates |
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164 // are having value 0.0. |
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165 // fix for bug "CGSR-78X9V2" |
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166 if(xy[0] == KZero && xy[1] == KZero) |
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167 { |
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168 xy[0] = KMinVal; |
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169 xy[1] = KMinVal; |
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170 } |
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171 if(rslt) |
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172 { |
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173 aPath->HorizonToL( xy[0], EFalse ); |
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174 } |
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175 |
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176 break; |
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177 case 'v': |
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178 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) ); |
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179 // added to change values from 0.0 to 0.01f if both the co-oridnates |
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180 // are having value 0.0. |
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181 // fix for bug "CGSR-78X9V2" |
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182 if(xy[0] == KZero && xy[1] == KZero) |
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183 { |
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184 xy[0] = KMinVal; |
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185 xy[1] = KMinVal; |
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186 } |
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187 if(rslt) |
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188 { |
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189 aPath->VertToL( xy[0], EFalse ); |
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190 } |
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191 |
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192 break; |
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193 case 'C': |
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194 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (6) ); |
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195 if( rslt ) |
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196 { |
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197 aPath->CubicToL( xy[0], |
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198 xy[1], |
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199 xy[2], |
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200 xy[3], |
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201 xy[4], |
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202 xy[5], |
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203 ETrue ); |
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204 } |
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205 break; |
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206 case 'c': |
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207 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (6) ); |
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208 if(rslt) |
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209 { |
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210 aPath->CubicToL( xy[0], |
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211 xy[1], |
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212 xy[2], |
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213 xy[3], |
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214 xy[4], |
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215 xy[5], |
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216 EFalse ); |
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217 } |
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218 break; |
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219 case 'S': |
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220 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) ); |
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221 if(rslt) |
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222 { |
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223 aPath->ShortCubicToL( xy[0], |
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224 xy[1], |
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225 xy[2], |
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226 xy[3], |
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227 ETrue ); |
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228 } |
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229 break; |
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230 case 's': |
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231 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) ); |
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232 if(rslt) |
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233 { |
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234 aPath->ShortCubicToL( xy[0], |
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235 xy[1], |
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236 xy[2], |
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237 xy[3], |
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238 EFalse ); |
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239 } |
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240 break; |
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241 case 'Q': |
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242 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) ); |
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243 if( rslt ) |
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244 { |
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245 aPath->QuadToL( xy[0], |
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246 xy[1], |
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247 xy[2], |
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248 xy[3], |
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249 ETrue ); |
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250 } |
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251 break; |
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252 case 'T': |
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253 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) ); |
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254 if(rslt) |
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255 { |
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256 |
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257 // If there is no previous command or if |
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258 // the previous command was not a Q, q, T or t, the control point shall be current point. |
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259 if ( lPrevCom2 !='Q' && lPrevCom2 != 'q' && lPrevCom2 != 'T' |
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260 && lPrevCom2 != 't' ) |
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261 { |
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262 aPath->QuadToLWithNoControlPoint( xy[0], xy[1] ); |
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263 } |
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264 else |
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265 { |
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266 aPath->ShortQuadToL( xy[0], xy[1], ETrue ); |
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267 } |
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268 } |
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269 break; |
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270 case 'q': |
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271 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) ); |
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272 if(rslt) |
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273 { |
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274 aPath->QuadToL( xy[0], |
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275 xy[1], |
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276 xy[2], |
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277 xy[3], |
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278 EFalse ); |
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279 } |
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280 break; |
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281 case 't': |
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282 rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) ); |
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283 if(xy[0] != KZero || xy[1] != KZero) |
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284 { |
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285 if(rslt) |
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286 { |
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287 aPath->ShortQuadToL( xy[0], xy[1], EFalse ); |
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288 } |
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289 } |
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290 break; |
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291 case 'Z': |
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292 case 'z': |
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293 aPath->ClosePathL(); |
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294 break; |
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295 |
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296 default: |
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297 rslt=0; |
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298 break; |
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299 |
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300 }// switch(lPrevCom) |
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301 |
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302 if( !rslt ) |
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303 { |
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304 // This is a failing path case reset. |
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305 aPath->Reset(); |
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306 break ; |
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307 } |
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308 |
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309 lPrevCom2 = com; |
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310 } |
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311 svgplex.Cleanup(); |
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312 } |
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313 |
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314 // |
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315 // --------------------------------------------------------------------------- |
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316 // |
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317 // --------------------------------------------------------------------------- |
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318 void TSvgPathDataParser::ParsePointDataL( const TDesC& aData, |
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319 CGfxGeneralPath* aPath ) |
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320 { |
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321 TSvgPointLexer svgplex( aData ); |
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322 TBool first = ETrue; |
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323 while ( !svgplex.IsDone() ) |
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324 { |
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325 TChar com; |
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326 TFloatFixPt x, y; |
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327 TInt32 rslt = svgplex.GetNextPoint( com, x, y ); |
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328 |
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329 if ( rslt != KErrNone ) |
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330 { |
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331 aPath->Reset(); |
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332 break; |
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333 } |
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334 if ( first ) |
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335 { |
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336 aPath->MoveToL( x, y, ETrue ); |
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337 first = EFalse; |
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338 } |
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339 else |
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340 { |
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341 aPath->LineToL( x, y, ETrue ); |
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342 } |
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343 } |
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344 svgplex.Cleanup(); |
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345 } |
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346 |
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347 // |
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348 // --------------------------------------------------------------------------- |
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349 // |
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350 // --------------------------------------------------------------------------- |
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351 TFloatFixPt TSvgPathDataParser::PathLengthL( CGfxGeneralPath* aPath ) |
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352 { |
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353 CGfxFlatteningPathIterator* pitr; |
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354 TGfxAffineTransform ident; |
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355 pitr = CGfxFlatteningPathIterator::NewL( aPath, & ident, 3 ); |
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356 |
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357 |
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358 CleanupStack::PushL( pitr ); |
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359 |
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360 TFloatFixPt len; |
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361 TFloatFixPt lx, ly; |
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362 TFloatFixPt dx, dy, int0x7f( KMAXFLOATFIX ); |
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363 TFloatFixPt tmpcoords[6]; |
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364 while ( !pitr->IsDone() ) |
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365 { |
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366 switch ( pitr->CurrentSegment( tmpcoords ) ) |
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367 { |
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368 case EGfxSegMoveTo: |
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369 lx = tmpcoords[0]; |
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370 ly = tmpcoords[1]; |
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371 break; |
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372 case EGfxSegLineTo: |
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373 dx = lx - tmpcoords[0]; |
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374 dy = ly - tmpcoords[1]; |
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375 if ( dx > int0x7f || dy > int0x7f ) |
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376 { |
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377 // calculate as integer |
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378 TInt32 tmplen, tx, ty; |
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379 tx = ( TInt32 ) dx; |
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380 ty = ( TInt32 ) dy; |
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381 #ifdef SVG_FLOAT_BUILD |
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382 tmplen = TFloatFixPt::Sqrt(tx * tx + ty * ty); |
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383 #else |
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384 tmplen = TFloatFixPt::FixedSqrtGeneral( tx * tx + ty * ty, 0 ); |
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385 #endif |
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386 len += TFloatFixPt( tmplen ); |
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387 } |
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388 else |
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389 { |
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390 // calculate as TFixPt |
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391 |
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392 len += TFloatFixPt::Sqrt( dx * dx + dy * dy ); |
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393 } |
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394 lx = tmpcoords[0]; |
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395 ly = tmpcoords[1]; |
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396 break; |
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397 case EGfxSegClose: |
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398 ;// Not support multiple path length |
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399 break; |
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400 default: |
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401 break; |
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402 } |
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403 pitr->NextL(); |
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404 } |
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405 |
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406 CleanupStack::PopAndDestroy( 1 ); |
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407 |
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408 return len; |
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409 } |