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1 /* |
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2 * Copyright (c) 2005-2008 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: Utility class for effects. |
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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 FILES |
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20 #include <e32base.h> |
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21 |
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22 #include "AknsRlEffectUtil.h" |
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23 |
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24 // ============================ MEMBER FUNCTIONS =============================== |
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25 |
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26 // ----------------------------------------------------------------------------- |
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27 // AknsRlUtil::Median9 |
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28 // ----------------------------------------------------------------------------- |
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29 // |
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30 #define AKNS_RL_EFFECT_SORT(a, b) { if((a) > (b)) { temp=(a); (a) = (b); (b) = temp; } } |
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31 TUint8 AknsRlUtil::Median9( TUint8 aArray[9] ) |
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32 { |
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33 TUint8 temp; // Defined for AKNS_RL_EFFECT_SORT macro |
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34 AKNS_RL_EFFECT_SORT(aArray[1], aArray[2]); AKNS_RL_EFFECT_SORT(aArray[4], aArray[5]); AKNS_RL_EFFECT_SORT(aArray[7], aArray[8]); |
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35 AKNS_RL_EFFECT_SORT(aArray[0], aArray[1]); AKNS_RL_EFFECT_SORT(aArray[3], aArray[4]); AKNS_RL_EFFECT_SORT(aArray[6], aArray[7]); |
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36 AKNS_RL_EFFECT_SORT(aArray[1], aArray[2]); AKNS_RL_EFFECT_SORT(aArray[4], aArray[5]); AKNS_RL_EFFECT_SORT(aArray[7], aArray[8]); |
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37 AKNS_RL_EFFECT_SORT(aArray[0], aArray[3]); AKNS_RL_EFFECT_SORT(aArray[5], aArray[8]); AKNS_RL_EFFECT_SORT(aArray[4], aArray[7]); |
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38 AKNS_RL_EFFECT_SORT(aArray[3], aArray[6]); AKNS_RL_EFFECT_SORT(aArray[1], aArray[4]); AKNS_RL_EFFECT_SORT(aArray[2], aArray[5]); |
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39 AKNS_RL_EFFECT_SORT(aArray[4], aArray[7]); AKNS_RL_EFFECT_SORT(aArray[4], aArray[2]); AKNS_RL_EFFECT_SORT(aArray[6], aArray[4]); |
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40 AKNS_RL_EFFECT_SORT(aArray[4], aArray[2]); |
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41 |
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42 return(aArray[4]); |
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43 } |
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44 |
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45 // ----------------------------------------------------------------------------- |
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46 // AknsRlChannelBlend::Blend |
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47 // ----------------------------------------------------------------------------- |
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48 // |
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49 TUint8 AknsRlChannelBlend::Blend( const TAknsRlChannelBlendMode aMode, |
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50 const TInt aFactor, |
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51 const TUint8 aA, |
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52 const TUint8 aB ) |
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53 { |
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54 // Some calculations will result in negative values, res must be signed |
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55 TInt res = 0; |
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56 |
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57 // Note: It is assumed that arithmetic shifting is supported |
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58 // -> negative values are shifted correctly |
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59 |
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60 switch(aMode) |
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61 { |
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62 case EAknsRlChannelBlendNormal: |
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63 { |
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64 res = aB; |
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65 } |
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66 break; |
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67 case EAknsRlChannelBlendDarken: |
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68 { |
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69 if( aA < aB ) |
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70 res = aA; |
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71 else |
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72 res = aB; |
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73 } |
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74 break; |
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75 case EAknsRlChannelBlendLighten: |
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76 { |
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77 if( aA > aB ) |
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78 res = aA; |
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79 else |
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80 res = aB; |
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81 } |
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82 break; |
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83 case EAknsRlChannelBlendMultiply: |
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84 { |
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85 res = ( aA * aB ) >> 8; |
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86 } |
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87 break; |
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88 case EAknsRlChannelBlendScreen: |
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89 { |
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90 res = 255 - ((( 255 - aA ) * ( 255 - aB )) >> 8 ); //lint !e702 Arithmetic shifting assumed |
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91 } |
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92 break; |
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93 case EAknsRlChannelBlendOverlay: |
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94 { |
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95 if( aA < 127 ) |
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96 res = 2 * (( aA * aB ) >> 8); |
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97 else |
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98 res = 255 - 2 * ((( 255 - aA ) * ( 255 - aB )) >> 8 ); //lint !e702 Arithmetic shifting assumed |
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99 } |
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100 break; |
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101 case EAknsRlChannelBlendHardLight: |
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102 { |
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103 if( aB < 127 ) |
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104 res = 2 * (( aA * aB ) >> 8 ); |
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105 else |
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106 res = 255 - 2 * ((( 255 - aA ) * ( 255 - aB )) >> 8 ); //lint !e702 Arithmetic shifting assumed |
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107 } |
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108 break; |
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109 case EAknsRlChannelBlendSoftLight: |
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110 { |
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111 res = 2 * (( aA * aB ) >> 8 ) + (( aA * aA ) >> 8 ) - 2 * (( aA * (( aA * aB ) >> 8 )) >> 8 ); //lint !e702 Arithmetic shifting assumed |
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112 } |
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113 break; |
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114 case EAknsRlChannelBlendDifference: |
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115 { |
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116 res = aA - aB; |
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117 if( res < 0 ) |
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118 res = -res; |
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119 } |
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120 break; |
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121 case EAknsRlChannelBlendDodge: |
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122 { |
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123 if( 255 == aB ) |
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124 res = 255; |
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125 else |
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126 { |
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127 res = ( aA << 8 ) / ( 255 - aB ); |
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128 |
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129 // Do clamping here to prevent artefacts in blending |
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130 if( res < 0 ) |
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131 res = 0; |
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132 if( res > 255 ) |
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133 res = 255; |
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134 } |
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135 } |
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136 break; |
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137 case EAknsRlChannelBlendBurn: |
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138 { |
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139 if( 0 == aB ) |
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140 res = 0; // This makes burn work as in Paint Shop Pro |
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141 else |
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142 { |
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143 res = 255 - ((( 255 - aA ) << 8 ) / aB ); |
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144 |
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145 // Do clamping here to prevent artefacts in blending |
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146 if( res < 0 ) |
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147 res = 0; |
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148 if( res > 255 ) |
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149 res = 255; |
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150 } |
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151 } |
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152 break; |
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153 default: |
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154 break; |
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155 } |
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156 |
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157 // Blend between result and the original value |
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158 res = ( res * aFactor + ( 255 - aFactor ) * aA ) >> 8; //lint !e702 Arithmetic shifting assumed |
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159 |
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160 // Clamp the result to range [0, 255] |
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161 if( res < 0 ) |
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162 return 0; |
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163 if( res > 255 ) |
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164 return 255; |
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165 |
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166 return TUint8(res); |
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167 } |
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168 |
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169 // End of file. |