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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 /** |
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17 @file |
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18 @internalComponent |
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19 */ |
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20 #include <e32base.h> |
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21 |
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22 #include "imgpositionprocessor.h" |
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23 |
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24 TPositionProcessor::TPositionProcessor() |
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25 { |
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26 iImgCornerCoord[0] = KJpgTLCoord; |
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27 iImgCornerCoord[1] = KJpgTRCoord; |
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28 iImgCornerCoord[2] = KJpgBLCoord; |
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29 iImgCornerCoord[3] = KJpgBRCoord; |
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30 |
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31 iIsEOF = EFalse; |
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32 iSwapDimensions = EFalse; |
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33 } |
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34 |
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35 /** |
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36 Set the dimensions for image rectangle and MCUs |
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37 */ |
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38 void TPositionProcessor::SetDimensions(const TRect& aPixelFrame, const TSize& aPixelBlock) |
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39 { |
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40 iPixelFrame = aPixelFrame; |
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41 iPixelBlock = aPixelBlock; |
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42 |
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43 iIsEOF = EFalse; |
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44 iSwapDimensions = EFalse; |
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45 } |
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46 |
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47 /** |
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48 Sets the end of image flag. |
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49 */ |
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50 void TPositionProcessor::SetEndOfImage(TBool aEndOfImage) |
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51 { |
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52 iIsEOF = aEndOfImage; |
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53 } |
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54 |
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55 /** |
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56 Transform image corner coordinates in case of rotation. This is a 90 degrees clockwise rotation. |
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57 This can be called multiple times to achieve 180, 270 or 360 degree rotation. |
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58 */ |
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59 void TPositionProcessor::RotateCoordinates() |
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60 { |
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61 TUint8 tempVal = iImgCornerCoord[0]; |
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62 |
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63 iImgCornerCoord[0] = iImgCornerCoord[1]; |
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64 iImgCornerCoord[1] = iImgCornerCoord[3]; |
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65 iImgCornerCoord[3] = iImgCornerCoord[2]; |
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66 iImgCornerCoord[2] = tempVal; |
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67 |
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68 if(iSwapDimensions == EFalse) |
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69 { |
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70 iSwapDimensions = ETrue; |
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71 } |
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72 else |
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73 { |
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74 iSwapDimensions = EFalse; |
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75 } |
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76 } |
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77 |
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78 /** |
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79 Transform image corner coordinates in case of horizontal flip |
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80 */ |
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81 void TPositionProcessor::HorFlipCoordinates() |
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82 { |
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83 TUint8 tempVal = iImgCornerCoord[0]; |
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84 |
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85 iImgCornerCoord[0] = iImgCornerCoord[2]; |
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86 iImgCornerCoord[2] = tempVal; |
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87 tempVal = iImgCornerCoord[1]; |
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88 iImgCornerCoord[1] = iImgCornerCoord[3]; |
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89 iImgCornerCoord[3] = tempVal; |
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90 } |
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91 |
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92 /** |
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93 Transform image corner coordinates in case of vertical flip |
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94 */ |
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95 void TPositionProcessor::VerFlipCoordinates() |
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96 { |
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97 TUint8 tempVal = iImgCornerCoord[0]; |
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98 |
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99 iImgCornerCoord[0] = iImgCornerCoord[1]; |
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100 iImgCornerCoord[1] = tempVal; |
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101 tempVal = iImgCornerCoord[2]; |
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102 iImgCornerCoord[2] = iImgCornerCoord[3]; |
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103 iImgCornerCoord[3] = tempVal; |
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104 } |
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105 |
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106 /** |
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107 Moves to the first position of MCU in case of MCU transformation and pixel coordinate in case of data unit cooefficient transformation |
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108 */ |
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109 void TPositionProcessor::MoveFirst() |
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110 { |
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111 TUint32* transformType = reinterpret_cast<TUint32*>(iImgCornerCoord); |
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112 |
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113 switch (*transformType) |
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114 { |
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115 case ENormalEncode: |
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116 iCurrentPosition = iPixelFrame.iTl; |
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117 break; |
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118 case EEncodeRotate90: |
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119 iCurrentPosition.SetXY(iPixelFrame.iTl.iX, iPixelFrame.iBr.iY - iPixelBlock.iHeight); |
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120 break; |
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121 case EEncodeHorizontalFlip: |
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122 iCurrentPosition.SetXY(iPixelFrame.iTl.iX, iPixelFrame.iBr.iY - iPixelBlock.iHeight); |
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123 break; |
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124 case EEncodeVerticalFlip: |
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125 iCurrentPosition.SetXY(iPixelFrame.iBr.iX - iPixelBlock.iWidth, iPixelFrame.iTl.iY); |
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126 break; |
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127 case EEncodeRotate180: |
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128 iCurrentPosition.SetXY(iPixelFrame.iBr.iX - iPixelBlock.iWidth, iPixelFrame.iBr.iY - iPixelBlock.iHeight); |
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129 break; |
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130 case EEncodeRotate270: |
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131 iCurrentPosition.SetXY(iPixelFrame.iBr.iX - iPixelBlock.iWidth, iPixelFrame.iTl.iY); |
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132 break; |
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133 case EEncodeHorizontalFlipRotate90: |
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134 iCurrentPosition.SetXY(iPixelFrame.iBr.iX - iPixelBlock.iWidth, iPixelFrame.iBr.iY - iPixelBlock.iHeight); |
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135 break; |
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136 case EEncodeVerticalFlipRotate90: |
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137 iCurrentPosition = iPixelFrame.iTl; |
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138 break; |
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139 default: |
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140 ASSERT(EFalse); |
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141 } |
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142 } |
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143 |
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144 /** |
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145 Moves to the next position of MCU in case of MCU transformation and pixel coordinate in case of data unit cooefficient transformation |
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146 */ |
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147 void TPositionProcessor::MoveNext() |
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148 { |
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149 TUint32* transformType = reinterpret_cast<TUint32*>(iImgCornerCoord); |
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150 switch (*transformType) |
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151 { |
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152 case ENormalEncode: |
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153 { |
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154 iCurrentPosition.iX += iPixelBlock.iWidth; |
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155 if (iCurrentPosition.iX >= iPixelFrame.iBr.iX) |
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156 { |
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157 if (iCurrentPosition.iY + iPixelBlock.iHeight>= iPixelFrame.iBr.iY) |
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158 { |
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159 iIsEOF = ETrue; |
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160 return; |
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161 } |
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162 iCurrentPosition.iX = iPixelFrame.iTl.iX; |
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163 iCurrentPosition.iY += iPixelBlock.iHeight; |
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164 } |
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165 } |
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166 break; |
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167 case EEncodeRotate90: |
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168 { |
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169 iCurrentPosition.iY -= iPixelBlock.iHeight; |
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170 if (iCurrentPosition.iY < iPixelFrame.iTl.iY) |
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171 { |
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172 if (iCurrentPosition.iX + iPixelBlock.iWidth >= iPixelFrame.iBr.iX) |
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173 { |
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174 iIsEOF = ETrue; |
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175 return; |
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176 } |
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177 iCurrentPosition.iY = iPixelFrame.iBr.iY - iPixelBlock.iHeight; |
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178 iCurrentPosition.iX += iPixelBlock.iWidth; |
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179 } |
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180 } |
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181 break; |
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182 case EEncodeHorizontalFlip: |
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183 { |
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184 iCurrentPosition.iX += iPixelBlock.iWidth; |
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185 |
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186 if (iCurrentPosition.iX >= iPixelFrame.iBr.iX) |
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187 { |
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188 if (iCurrentPosition.iY <= iPixelFrame.iTl.iY) |
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189 { |
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190 iIsEOF = ETrue; |
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191 return; |
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192 } |
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193 iCurrentPosition.iX = iPixelFrame.iTl.iX; |
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194 iCurrentPosition.iY -= iPixelBlock.iHeight; |
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195 } |
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196 } |
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197 break; |
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198 case EEncodeVerticalFlip: |
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199 { |
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200 iCurrentPosition.iX -= iPixelBlock.iWidth; |
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201 if (iCurrentPosition.iX < iPixelFrame.iTl.iX) |
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202 { |
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203 if (iCurrentPosition.iY + iPixelBlock.iHeight>= iPixelFrame.iBr.iY) |
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204 { |
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205 iIsEOF = ETrue; |
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206 return; |
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207 } |
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208 iCurrentPosition.iX = iPixelFrame.iBr.iX - iPixelBlock.iWidth; |
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209 iCurrentPosition.iY += iPixelBlock.iHeight; |
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210 } |
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211 } |
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212 break; |
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213 case EEncodeRotate180: |
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214 { |
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215 iCurrentPosition.iX -= iPixelBlock.iWidth; |
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216 if (iCurrentPosition.iX < iPixelFrame.iTl.iX) |
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217 { |
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218 if (iCurrentPosition.iY - iPixelBlock.iHeight < iPixelFrame.iTl.iY) |
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219 { |
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220 iIsEOF = ETrue; |
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221 return; |
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222 } |
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223 iCurrentPosition.iX = iPixelFrame.iBr.iX - iPixelBlock.iWidth; |
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224 iCurrentPosition.iY -= iPixelBlock.iHeight; |
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225 } |
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226 } |
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227 break; |
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228 case EEncodeRotate270: |
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229 { |
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230 iCurrentPosition.iY += iPixelBlock.iHeight; |
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231 if (iCurrentPosition.iY + iPixelBlock.iHeight > iPixelFrame.iBr.iY ) |
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232 { |
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233 if (iCurrentPosition.iX <= iPixelFrame.iTl.iX) |
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234 { |
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235 iIsEOF = ETrue; |
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236 return; |
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237 } |
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238 iCurrentPosition.iY = iPixelFrame.iTl.iY; |
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239 iCurrentPosition.iX -= iPixelBlock.iWidth; |
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240 } |
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241 } |
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242 break; |
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243 case EEncodeHorizontalFlipRotate90: |
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244 { |
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245 iCurrentPosition.iY -= iPixelBlock.iHeight; |
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246 if (iCurrentPosition.iY < iPixelFrame.iTl.iY) |
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247 { |
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248 if (iCurrentPosition.iX - iPixelBlock.iWidth < iPixelFrame.iTl.iX) |
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249 { |
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250 iIsEOF = ETrue; |
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251 return; |
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252 } |
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253 iCurrentPosition.iY = iPixelFrame.iBr.iY - iPixelBlock.iHeight; |
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254 iCurrentPosition.iX -= iPixelBlock.iWidth; |
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255 } |
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256 } |
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257 break; |
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258 case EEncodeVerticalFlipRotate90: |
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259 { |
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260 iCurrentPosition.iY += iPixelBlock.iHeight; |
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261 if (iCurrentPosition.iY + iPixelBlock.iHeight > iPixelFrame.iBr.iY) |
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262 { |
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263 if (iCurrentPosition.iX + iPixelBlock.iWidth >= iPixelFrame.iBr.iX) |
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264 { |
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265 iIsEOF = ETrue; |
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266 return; |
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267 } |
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268 iCurrentPosition.iY = iPixelFrame.iTl.iY; |
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269 iCurrentPosition.iX += iPixelBlock.iWidth; |
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270 } |
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271 } |
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272 break; |
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273 default: |
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274 ASSERT(EFalse); |
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275 } |
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276 } |
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277 |