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1 // Copyright (c) 1999-2009 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 "TIFFFax.h" |
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17 |
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18 const TInt KMaxHuffmanCodeLength = 13; |
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19 LOCAL_C inline TUint32 GetMostSignificantBits(TUint32 aBits,TInt aNumBits) |
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20 { |
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21 return(aBits>>(32-aNumBits)); |
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22 } |
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23 |
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24 |
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25 // CTiffFax1dDecoder. |
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26 CTiffFax1dDecoder::~CTiffFax1dDecoder() |
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27 { |
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28 delete []iRunData; |
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29 delete iImageProcessor; |
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30 } |
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31 |
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32 void CTiffFax1dDecoder::ConstructL(const TTiffImageData& aImageData) |
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33 { |
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34 iImageData = &aImageData; |
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35 |
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36 if((iImageData->iBitsPerSample>1) || (iImageData->iSamplesPerPixel>1)) |
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37 User::Leave(KErrNotSupported); |
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38 |
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39 if(iImageData->iFillOrder==2) |
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40 iReverseBitsInByte = ETrue; |
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41 |
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42 // note officially should check for iImageData->iPhotometricInterpretation==EBlackIsZero |
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43 // and reverse black, white interpretation, but some TIFF writers break this rule and other |
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44 // readers ignore it |
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45 iBlack = KRgbBlack; |
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46 iWhite = KRgbWhite; |
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47 |
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48 iRowWidth = iImageData->iSizeInPixels.iWidth; |
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49 iRowNumber = 0; |
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50 iRunData = new (ELeave) TInt[iRowWidth+2]; |
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51 } |
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52 |
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53 void CTiffFax1dDecoder::DoNewFrameL(CFbsBitmap& aBitmap, TBool aDisableErrorDiffusion, TInt aReductionFactor) |
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54 { |
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55 delete iImageProcessor; |
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56 iImageProcessor = NULL; |
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57 |
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58 iImageProcessor = ImageProcessorUtility::NewImageProcessorL(aBitmap, aReductionFactor, EGray2, aDisableErrorDiffusion); |
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59 iImageProcessor->PrepareL(aBitmap,iImageData->iSizeInPixels); |
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60 } |
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61 |
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62 void CTiffFax1dDecoder::NewStripL(TInt aNumBytes) |
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63 { |
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64 if(!aNumBytes) |
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65 aNumBytes = KMaxTInt; |
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66 |
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67 iRowsRemaining = iImageData->iRowsPerStrip; |
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68 |
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69 TInt maxRows = iImageData->iSizeInPixels.iHeight-iRowNumber; |
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70 if( (iRowsRemaining>maxRows) || (iRowsRemaining<=0) ) |
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71 iRowsRemaining = maxRows; |
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72 |
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73 iPixelsStoredInRow = 0; |
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74 |
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75 iBitCache = 0; |
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76 iBitCacheLength = 0; |
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77 |
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78 iCodeType = ETiffFaxWhiteRun; |
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79 |
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80 CTiffFax1dDecoder::NewRow(); |
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81 } |
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82 |
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83 void CTiffFax1dDecoder::NewRow() |
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84 { |
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85 iColor = ETiffFaxWhiteRun; |
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86 iRunDataIndex = 0; |
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87 iRunData[0] = 0; |
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88 } |
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89 |
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90 TBool CTiffFax1dDecoder::ProcessStripL(TBufPtr8* aSrc) |
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91 { |
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92 const TUint8* sourceBuffer = aSrc->Ptr(); |
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93 iSourcePtr = sourceBuffer; |
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94 iSourcePtrLimit = iSourcePtr+aSrc->Length(); |
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95 |
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96 UseBits(0); |
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97 |
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98 FOREVER |
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99 { |
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100 switch(ProcessNextCode()) |
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101 { |
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102 case ETiffFaxUnderflow: |
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103 aSrc->Shift(iSourcePtr-sourceBuffer); |
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104 return(EFalse); |
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105 |
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106 case ETiffFaxInvalid: |
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107 User::Leave(KErrCorrupt); |
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108 |
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109 case ETiffFaxEndOfLine: |
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110 if(iPixelsStoredInRow==0) |
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111 continue; |
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112 |
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113 if(iPixelsStoredInRow!=iRowWidth) |
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114 User::Leave(KErrCorrupt); |
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115 |
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116 NewRow(); |
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117 |
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118 iPixelsStoredInRow = 0; |
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119 iRowNumber++; |
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120 iRowsRemaining--; |
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121 continue; |
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122 |
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123 case ETiffFaxPixelRun: |
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124 if(!iCodeCount) |
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125 continue; |
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126 |
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127 { |
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128 TInt n = iPixelsStoredInRow+iCodeCount; |
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129 |
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130 if(n>iRowWidth) |
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131 User::Leave(KErrCorrupt); |
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132 |
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133 if(iCodeType==ETiffFaxBlackRun) |
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134 { |
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135 iImageProcessor->SetMonoPixelRun(0,iCodeCount); |
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136 |
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137 if(!(iRunDataIndex&1)) |
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138 iRunDataIndex++; |
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139 } |
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140 else |
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141 { |
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142 iImageProcessor->SetMonoPixelRun(255,iCodeCount); |
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143 |
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144 if(iRunDataIndex&1) |
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145 iRunDataIndex++; |
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146 } |
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147 |
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148 iPixelsStoredInRow = n; |
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149 iRunData[iRunDataIndex] = n; |
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150 |
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151 if((n!=iRowWidth) || (iRowsRemaining!=1)) // Continue if not last pixel of image |
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152 continue; |
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153 } |
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154 |
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155 // else drop through.... |
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156 |
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157 case ETiffFaxEndOfFax: |
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158 iImageProcessor->FlushPixels(); |
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159 return(ETrue); |
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160 } |
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161 } |
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162 } |
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163 |
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164 LOCAL_D const TUint8 KByteFlip[256] = |
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165 { |
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166 0x00,0x80,0x40,0xc0,0x20,0xa0,0x60,0xe0,0x10,0x90,0x50,0xd0,0x30,0xb0,0x70,0xf0, |
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167 0x08,0x88,0x48,0xc8,0x28,0xa8,0x68,0xe8,0x18,0x98,0x58,0xd8,0x38,0xb8,0x78,0xf8, |
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168 0x04,0x84,0x44,0xc4,0x24,0xa4,0x64,0xe4,0x14,0x94,0x54,0xd4,0x34,0xb4,0x74,0xf4, |
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169 0x0c,0x8c,0x4c,0xcc,0x2c,0xac,0x6c,0xec,0x1c,0x9c,0x5c,0xdc,0x3c,0xbc,0x7c,0xfc, |
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170 0x02,0x82,0x42,0xc2,0x22,0xa2,0x62,0xe2,0x12,0x92,0x52,0xd2,0x32,0xb2,0x72,0xf2, |
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171 0x0a,0x8a,0x4a,0xca,0x2a,0xaa,0x6a,0xea,0x1a,0x9a,0x5a,0xda,0x3a,0xba,0x7a,0xfa, |
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172 0x06,0x86,0x46,0xc6,0x26,0xa6,0x66,0xe6,0x16,0x96,0x56,0xd6,0x36,0xb6,0x76,0xf6, |
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173 0x0e,0x8e,0x4e,0xce,0x2e,0xae,0x6e,0xee,0x1e,0x9e,0x5e,0xde,0x3e,0xbe,0x7e,0xfe, |
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174 0x01,0x81,0x41,0xc1,0x21,0xa1,0x61,0xe1,0x11,0x91,0x51,0xd1,0x31,0xb1,0x71,0xf1, |
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175 0x09,0x89,0x49,0xc9,0x29,0xa9,0x69,0xe9,0x19,0x99,0x59,0xd9,0x39,0xb9,0x79,0xf9, |
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176 0x05,0x85,0x45,0xc5,0x25,0xa5,0x65,0xe5,0x15,0x95,0x55,0xd5,0x35,0xb5,0x75,0xf5, |
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177 0x0d,0x8d,0x4d,0xcd,0x2d,0xad,0x6d,0xed,0x1d,0x9d,0x5d,0xdd,0x3d,0xbd,0x7d,0xfd, |
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178 0x03,0x83,0x43,0xc3,0x23,0xa3,0x63,0xe3,0x13,0x93,0x53,0xd3,0x33,0xb3,0x73,0xf3, |
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179 0x0b,0x8b,0x4b,0xcb,0x2b,0xab,0x6b,0xeb,0x1b,0x9b,0x5b,0xdb,0x3b,0xbb,0x7b,0xfb, |
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180 0x07,0x87,0x47,0xc7,0x27,0xa7,0x67,0xe7,0x17,0x97,0x57,0xd7,0x37,0xb7,0x77,0xf7, |
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181 0x0f,0x8f,0x4f,0xcf,0x2f,0xaf,0x6f,0xef,0x1f,0x9f,0x5f,0xdf,0x3f,0xbf,0x7f,0xff |
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182 }; |
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183 |
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184 void CTiffFax1dDecoder::UseBits(TInt aNumBits) |
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185 { |
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186 ASSERT(aNumBits<=iBitCacheLength); |
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187 |
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188 TInt validBits = iBitCacheLength-aNumBits; |
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189 TUint32 bits = iBitCache<<aNumBits; |
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190 |
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191 if(validBits>=KMaxHuffmanCodeLength) |
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192 { |
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193 iBitCache = bits; |
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194 iBitCacheLength = validBits; |
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195 return; |
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196 } |
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197 |
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198 TInt shift = 32-validBits; |
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199 const TUint8* ptr = iSourcePtr; |
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200 |
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201 TInt numBytes = shift>>3; |
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202 TInt maxBytes = iSourcePtrLimit-ptr; |
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203 if(numBytes>maxBytes) |
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204 numBytes = maxBytes; |
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205 |
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206 iBitCacheLength = validBits+numBytes*8; |
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207 |
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208 const TUint8* ptrLimit = ptr+numBytes; |
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209 |
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210 if(iReverseBitsInByte) |
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211 { |
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212 while(ptr<ptrLimit) |
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213 { |
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214 TInt byte = *(ptr++); |
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215 byte = KByteFlip[byte]; // reverse bits within byte |
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216 shift -= 8; |
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217 bits |= byte<<shift; |
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218 } |
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219 } |
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220 else |
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221 { |
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222 while(ptr<ptrLimit) |
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223 { |
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224 TInt byte = *(ptr++); |
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225 shift -= 8; |
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226 bits |= byte<<shift; |
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227 } |
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228 } |
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229 |
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230 iBitCache = bits; |
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231 iSourcePtr = ptr; |
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232 |
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233 return; |
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234 } |
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235 |
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236 TTiffFaxState CTiffFax1dDecoder::Decode1d() |
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237 { |
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238 if(iBitCache&0xff000000) |
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239 { |
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240 if(iColor==ETiffFaxWhiteRun) |
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241 return(DecodeWhite()); |
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242 else |
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243 return(DecodeBlack()); |
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244 } |
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245 else |
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246 return(DecodeEndOfLine()); |
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247 } |
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248 |
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249 #define HUFFMAN_DECODE_ENTRY(aCount,aNumBits) (aCount<<4)+aNumBits |
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250 LOCAL_D const TUint16 White0000[16] = |
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251 { |
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252 HUFFMAN_DECODE_ENTRY(0 ,0), |
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253 HUFFMAN_DECODE_ENTRY(0 ,0), |
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254 HUFFMAN_DECODE_ENTRY(29 ,8), |
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255 HUFFMAN_DECODE_ENTRY(30 ,8), |
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256 HUFFMAN_DECODE_ENTRY(45 ,8), |
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257 HUFFMAN_DECODE_ENTRY(46 ,8), |
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258 HUFFMAN_DECODE_ENTRY(22 ,7), |
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259 HUFFMAN_DECODE_ENTRY(22 ,7), |
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260 |
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261 HUFFMAN_DECODE_ENTRY(23 ,7), |
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262 HUFFMAN_DECODE_ENTRY(23 ,7), |
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263 HUFFMAN_DECODE_ENTRY(47 ,8), |
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264 HUFFMAN_DECODE_ENTRY(48 ,8), |
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265 HUFFMAN_DECODE_ENTRY(13 ,6), |
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266 HUFFMAN_DECODE_ENTRY(13 ,6), |
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267 HUFFMAN_DECODE_ENTRY(13 ,6), |
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268 HUFFMAN_DECODE_ENTRY(13 ,6) |
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269 }; |
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270 |
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271 LOCAL_D const TUint16 White0001[16] = |
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272 { |
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273 HUFFMAN_DECODE_ENTRY(20 ,7), |
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274 HUFFMAN_DECODE_ENTRY(20 ,7), |
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275 HUFFMAN_DECODE_ENTRY(33 ,8), |
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276 HUFFMAN_DECODE_ENTRY(34 ,8), |
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277 HUFFMAN_DECODE_ENTRY(35 ,8), |
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278 HUFFMAN_DECODE_ENTRY(36 ,8), |
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279 HUFFMAN_DECODE_ENTRY(37 ,8), |
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280 HUFFMAN_DECODE_ENTRY(38 ,8), |
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281 |
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282 HUFFMAN_DECODE_ENTRY(19 ,7), |
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283 HUFFMAN_DECODE_ENTRY(19 ,7), |
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284 HUFFMAN_DECODE_ENTRY(31 ,8), |
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285 HUFFMAN_DECODE_ENTRY(32 ,8), |
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286 HUFFMAN_DECODE_ENTRY(1 ,6), |
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287 HUFFMAN_DECODE_ENTRY(1 ,6), |
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288 HUFFMAN_DECODE_ENTRY(1 ,6), |
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289 HUFFMAN_DECODE_ENTRY(1 ,6) |
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290 }; |
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291 |
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292 LOCAL_D const TUint16 White0010[16] = |
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293 { |
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294 HUFFMAN_DECODE_ENTRY(12 ,6), |
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295 HUFFMAN_DECODE_ENTRY(12 ,6), |
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296 HUFFMAN_DECODE_ENTRY(12 ,6), |
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297 HUFFMAN_DECODE_ENTRY(12 ,6), |
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298 HUFFMAN_DECODE_ENTRY(53 ,8), |
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299 HUFFMAN_DECODE_ENTRY(54 ,8), |
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300 HUFFMAN_DECODE_ENTRY(26 ,7), |
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301 HUFFMAN_DECODE_ENTRY(26 ,7), |
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302 |
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303 HUFFMAN_DECODE_ENTRY(39 ,8), |
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304 HUFFMAN_DECODE_ENTRY(40 ,8), |
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305 HUFFMAN_DECODE_ENTRY(41 ,8), |
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306 HUFFMAN_DECODE_ENTRY(42 ,8), |
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307 HUFFMAN_DECODE_ENTRY(43 ,8), |
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308 HUFFMAN_DECODE_ENTRY(44 ,8), |
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309 HUFFMAN_DECODE_ENTRY(21 ,7), |
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310 HUFFMAN_DECODE_ENTRY(21 ,7) |
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311 }; |
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312 |
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313 LOCAL_D const TUint16 White0011[16] = |
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314 { |
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315 HUFFMAN_DECODE_ENTRY(28 ,7), |
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316 HUFFMAN_DECODE_ENTRY(28 ,7), |
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317 HUFFMAN_DECODE_ENTRY(61 ,8), |
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318 HUFFMAN_DECODE_ENTRY(62 ,8), |
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319 HUFFMAN_DECODE_ENTRY(63 ,8), |
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320 HUFFMAN_DECODE_ENTRY(0 ,8), |
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321 HUFFMAN_DECODE_ENTRY(320 ,8), |
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322 HUFFMAN_DECODE_ENTRY(384 ,8), |
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323 |
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324 HUFFMAN_DECODE_ENTRY(10 ,5), |
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325 HUFFMAN_DECODE_ENTRY(10 ,5), |
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326 HUFFMAN_DECODE_ENTRY(10 ,5), |
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327 HUFFMAN_DECODE_ENTRY(10 ,5), |
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328 HUFFMAN_DECODE_ENTRY(10 ,5), |
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329 HUFFMAN_DECODE_ENTRY(10 ,5), |
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330 HUFFMAN_DECODE_ENTRY(10 ,5), |
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331 HUFFMAN_DECODE_ENTRY(10 ,5) |
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332 }; |
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333 |
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334 LOCAL_D const TUint16 White0100[32] = |
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335 { |
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336 HUFFMAN_DECODE_ENTRY(11 ,5), |
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337 HUFFMAN_DECODE_ENTRY(11 ,5), |
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338 HUFFMAN_DECODE_ENTRY(11 ,5), |
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339 HUFFMAN_DECODE_ENTRY(11 ,5), |
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340 HUFFMAN_DECODE_ENTRY(11 ,5), |
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341 HUFFMAN_DECODE_ENTRY(11 ,5), |
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342 HUFFMAN_DECODE_ENTRY(11 ,5), |
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343 HUFFMAN_DECODE_ENTRY(11 ,5), |
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344 |
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345 HUFFMAN_DECODE_ENTRY(11 ,5), |
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346 HUFFMAN_DECODE_ENTRY(11 ,5), |
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347 HUFFMAN_DECODE_ENTRY(11 ,5), |
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348 HUFFMAN_DECODE_ENTRY(11 ,5), |
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349 HUFFMAN_DECODE_ENTRY(11 ,5), |
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350 HUFFMAN_DECODE_ENTRY(11 ,5), |
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351 HUFFMAN_DECODE_ENTRY(11 ,5), |
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352 HUFFMAN_DECODE_ENTRY(11 ,5), |
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353 |
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354 HUFFMAN_DECODE_ENTRY(27 ,7), |
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355 HUFFMAN_DECODE_ENTRY(27 ,7), |
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356 HUFFMAN_DECODE_ENTRY(27 ,7), |
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357 HUFFMAN_DECODE_ENTRY(27 ,7), |
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358 HUFFMAN_DECODE_ENTRY(59 ,8), |
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359 HUFFMAN_DECODE_ENTRY(59 ,8), |
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360 HUFFMAN_DECODE_ENTRY(60 ,8), |
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361 HUFFMAN_DECODE_ENTRY(60 ,8), |
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362 |
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363 HUFFMAN_DECODE_ENTRY(1472 ,9), |
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364 HUFFMAN_DECODE_ENTRY(1536 ,9), |
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365 HUFFMAN_DECODE_ENTRY(1600 ,9), |
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366 HUFFMAN_DECODE_ENTRY(1728 ,9), |
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367 HUFFMAN_DECODE_ENTRY(18 ,7), |
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368 HUFFMAN_DECODE_ENTRY(18 ,7), |
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369 HUFFMAN_DECODE_ENTRY(18 ,7), |
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370 HUFFMAN_DECODE_ENTRY(18 ,7) |
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371 }; |
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372 |
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373 LOCAL_D const TUint16 White0101[16] = |
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374 { |
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375 HUFFMAN_DECODE_ENTRY(24 ,7), |
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376 HUFFMAN_DECODE_ENTRY(24 ,7), |
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377 HUFFMAN_DECODE_ENTRY(49 ,8), |
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378 HUFFMAN_DECODE_ENTRY(50 ,8), |
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379 HUFFMAN_DECODE_ENTRY(51 ,8), |
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380 HUFFMAN_DECODE_ENTRY(52 ,8), |
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381 HUFFMAN_DECODE_ENTRY(25 ,7), |
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382 HUFFMAN_DECODE_ENTRY(25 ,7), |
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383 |
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384 HUFFMAN_DECODE_ENTRY(55 ,8), |
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385 HUFFMAN_DECODE_ENTRY(56 ,8), |
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386 HUFFMAN_DECODE_ENTRY(57 ,8), |
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387 HUFFMAN_DECODE_ENTRY(58 ,8), |
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388 HUFFMAN_DECODE_ENTRY(192 ,6), |
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389 HUFFMAN_DECODE_ENTRY(192 ,6), |
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390 HUFFMAN_DECODE_ENTRY(192 ,6), |
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391 HUFFMAN_DECODE_ENTRY(192 ,6) |
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392 }; |
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393 |
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394 LOCAL_D const TUint16 White0110[32] = |
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395 { |
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396 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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397 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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398 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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399 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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400 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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401 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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402 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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403 HUFFMAN_DECODE_ENTRY(1664 ,6), |
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404 |
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405 HUFFMAN_DECODE_ENTRY(448 ,8), |
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406 HUFFMAN_DECODE_ENTRY(448 ,8), |
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407 HUFFMAN_DECODE_ENTRY(512 ,8), |
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408 HUFFMAN_DECODE_ENTRY(512 ,8), |
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409 HUFFMAN_DECODE_ENTRY(704 ,9), |
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410 HUFFMAN_DECODE_ENTRY(768 ,9), |
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411 HUFFMAN_DECODE_ENTRY(640 ,8), |
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412 HUFFMAN_DECODE_ENTRY(640 ,8), |
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413 |
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414 HUFFMAN_DECODE_ENTRY(576 ,8), |
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415 HUFFMAN_DECODE_ENTRY(576 ,8), |
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416 HUFFMAN_DECODE_ENTRY(832 ,9), |
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417 HUFFMAN_DECODE_ENTRY(896 ,9), |
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418 HUFFMAN_DECODE_ENTRY(960 ,9), |
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419 HUFFMAN_DECODE_ENTRY(1024 ,9), |
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420 HUFFMAN_DECODE_ENTRY(1088 ,9), |
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421 HUFFMAN_DECODE_ENTRY(1152 ,9), |
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422 |
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423 HUFFMAN_DECODE_ENTRY(1216 ,9), |
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424 HUFFMAN_DECODE_ENTRY(1280 ,9), |
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425 HUFFMAN_DECODE_ENTRY(1344 ,9), |
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426 HUFFMAN_DECODE_ENTRY(1408 ,9), |
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427 HUFFMAN_DECODE_ENTRY(256 ,7), |
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428 HUFFMAN_DECODE_ENTRY(256 ,7), |
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429 HUFFMAN_DECODE_ENTRY(256 ,7), |
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430 HUFFMAN_DECODE_ENTRY(256 ,7) |
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431 }; |
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432 |
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433 LOCAL_D const TUint16 White0111[1] = |
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434 { |
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435 HUFFMAN_DECODE_ENTRY(2 ,4) |
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436 }; |
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437 |
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438 LOCAL_D const TUint16 White1000[1] = |
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439 { |
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440 HUFFMAN_DECODE_ENTRY(3 ,4) |
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441 }; |
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442 |
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443 LOCAL_D const TUint16 White1001[2] = |
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444 { |
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445 HUFFMAN_DECODE_ENTRY(128 ,5), |
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446 HUFFMAN_DECODE_ENTRY(8 ,5) |
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447 }; |
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448 |
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449 LOCAL_D const TUint16 White1010[4] = |
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450 { |
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451 HUFFMAN_DECODE_ENTRY(9 ,5), |
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452 HUFFMAN_DECODE_ENTRY(9 ,5), |
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453 HUFFMAN_DECODE_ENTRY(16 ,6), |
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454 HUFFMAN_DECODE_ENTRY(17 ,6) |
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455 }; |
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456 |
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457 LOCAL_D const TUint16 White1011[1] = |
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458 { |
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459 HUFFMAN_DECODE_ENTRY(4 ,4) |
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460 }; |
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461 |
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462 LOCAL_D const TUint16 White1100[1] = |
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463 { |
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464 HUFFMAN_DECODE_ENTRY(5 ,4) |
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465 }; |
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466 |
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467 LOCAL_D const TUint16 White1101[4] = |
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468 { |
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469 HUFFMAN_DECODE_ENTRY(14 ,6), |
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470 HUFFMAN_DECODE_ENTRY(15 ,6), |
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471 HUFFMAN_DECODE_ENTRY(64 ,5), |
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472 HUFFMAN_DECODE_ENTRY(64 ,5) |
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473 }; |
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474 |
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475 LOCAL_D const TUint16 White1110[1] = |
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476 { |
|
477 HUFFMAN_DECODE_ENTRY(6 ,4) |
|
478 }; |
|
479 |
|
480 LOCAL_D const TUint16 White1111[1] = |
|
481 { |
|
482 HUFFMAN_DECODE_ENTRY(7 ,4) |
|
483 }; |
|
484 |
|
485 LOCAL_D const TUint16 Black0001[4] = |
|
486 { |
|
487 HUFFMAN_DECODE_ENTRY(9 ,6), |
|
488 HUFFMAN_DECODE_ENTRY(8 ,6), |
|
489 HUFFMAN_DECODE_ENTRY(7 ,5), |
|
490 HUFFMAN_DECODE_ENTRY(7 ,5) |
|
491 }; |
|
492 |
|
493 LOCAL_D const TUint16 Black0010[1] = |
|
494 { |
|
495 HUFFMAN_DECODE_ENTRY(6 ,4) |
|
496 }; |
|
497 |
|
498 LOCAL_D const TUint16 Black0011[1] = |
|
499 { |
|
500 HUFFMAN_DECODE_ENTRY(5 ,4) |
|
501 }; |
|
502 |
|
503 LOCAL_D const TUint16 Black010x[1] = |
|
504 { |
|
505 HUFFMAN_DECODE_ENTRY(1 ,3) |
|
506 }; |
|
507 |
|
508 LOCAL_D const TUint16 Black011x[1] = |
|
509 { |
|
510 HUFFMAN_DECODE_ENTRY(4 ,3) |
|
511 }; |
|
512 |
|
513 LOCAL_D const TUint16 Black10xx[1] = |
|
514 { |
|
515 HUFFMAN_DECODE_ENTRY(3 ,2) |
|
516 }; |
|
517 |
|
518 LOCAL_D const TUint16 Black11xx[1] = |
|
519 { |
|
520 HUFFMAN_DECODE_ENTRY(2 ,2) |
|
521 }; |
|
522 |
|
523 LOCAL_D const TUint16 Black0000_0010[32] = |
|
524 { |
|
525 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
526 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
527 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
528 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
529 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
530 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
531 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
532 HUFFMAN_DECODE_ENTRY(18 ,10), |
|
533 |
|
534 HUFFMAN_DECODE_ENTRY(52 ,12), |
|
535 HUFFMAN_DECODE_ENTRY(52 ,12), |
|
536 HUFFMAN_DECODE_ENTRY(640 ,13), |
|
537 HUFFMAN_DECODE_ENTRY(704 ,13), |
|
538 HUFFMAN_DECODE_ENTRY(768 ,13), |
|
539 HUFFMAN_DECODE_ENTRY(832 ,13), |
|
540 HUFFMAN_DECODE_ENTRY(55 ,12), |
|
541 HUFFMAN_DECODE_ENTRY(55 ,12), |
|
542 |
|
543 HUFFMAN_DECODE_ENTRY(56 ,12), |
|
544 HUFFMAN_DECODE_ENTRY(56 ,12), |
|
545 HUFFMAN_DECODE_ENTRY(1280 ,13), |
|
546 HUFFMAN_DECODE_ENTRY(1344 ,13), |
|
547 HUFFMAN_DECODE_ENTRY(1408 ,13), |
|
548 HUFFMAN_DECODE_ENTRY(1472 ,13), |
|
549 HUFFMAN_DECODE_ENTRY(59 ,12), |
|
550 HUFFMAN_DECODE_ENTRY(59 ,12), |
|
551 |
|
552 HUFFMAN_DECODE_ENTRY(60 ,12), |
|
553 HUFFMAN_DECODE_ENTRY(60 ,12), |
|
554 HUFFMAN_DECODE_ENTRY(1536 ,13), |
|
555 HUFFMAN_DECODE_ENTRY(1600 ,13), |
|
556 HUFFMAN_DECODE_ENTRY(24 ,11), |
|
557 HUFFMAN_DECODE_ENTRY(24 ,11), |
|
558 HUFFMAN_DECODE_ENTRY(24 ,11), |
|
559 HUFFMAN_DECODE_ENTRY(24 ,11) |
|
560 }; |
|
561 |
|
562 LOCAL_D const TUint16 Black0000_0011[32] = |
|
563 { |
|
564 HUFFMAN_DECODE_ENTRY(25 ,11), |
|
565 HUFFMAN_DECODE_ENTRY(25 ,11), |
|
566 HUFFMAN_DECODE_ENTRY(25 ,11), |
|
567 HUFFMAN_DECODE_ENTRY(25 ,11), |
|
568 HUFFMAN_DECODE_ENTRY(1664 ,13), |
|
569 HUFFMAN_DECODE_ENTRY(1728 ,13), |
|
570 HUFFMAN_DECODE_ENTRY(320 ,12), |
|
571 HUFFMAN_DECODE_ENTRY(320 ,12), |
|
572 |
|
573 HUFFMAN_DECODE_ENTRY(384 ,12), |
|
574 HUFFMAN_DECODE_ENTRY(384 ,12), |
|
575 HUFFMAN_DECODE_ENTRY(448 ,12), |
|
576 HUFFMAN_DECODE_ENTRY(448 ,12), |
|
577 HUFFMAN_DECODE_ENTRY(512 ,13), |
|
578 HUFFMAN_DECODE_ENTRY(576 ,13), |
|
579 HUFFMAN_DECODE_ENTRY(53 ,12), |
|
580 HUFFMAN_DECODE_ENTRY(53 ,12), |
|
581 |
|
582 HUFFMAN_DECODE_ENTRY(54 ,12), |
|
583 HUFFMAN_DECODE_ENTRY(54 ,12), |
|
584 HUFFMAN_DECODE_ENTRY(896 ,13), |
|
585 HUFFMAN_DECODE_ENTRY(960 ,13), |
|
586 HUFFMAN_DECODE_ENTRY(1024 ,13), |
|
587 HUFFMAN_DECODE_ENTRY(1088 ,13), |
|
588 HUFFMAN_DECODE_ENTRY(1152 ,13), |
|
589 HUFFMAN_DECODE_ENTRY(1216 ,13), |
|
590 |
|
591 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
592 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
593 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
594 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
595 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
596 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
597 HUFFMAN_DECODE_ENTRY(64 ,10), |
|
598 HUFFMAN_DECODE_ENTRY(64 ,10) |
|
599 }; |
|
600 |
|
601 LOCAL_D const TUint16 Black0000_0100[1] = |
|
602 { |
|
603 HUFFMAN_DECODE_ENTRY(13 ,8) |
|
604 }; |
|
605 |
|
606 LOCAL_D const TUint16 Black0000_0101[16] = |
|
607 { |
|
608 HUFFMAN_DECODE_ENTRY(23 ,11), |
|
609 HUFFMAN_DECODE_ENTRY(23 ,11), |
|
610 HUFFMAN_DECODE_ENTRY(50 ,12), |
|
611 HUFFMAN_DECODE_ENTRY(51 ,12), |
|
612 HUFFMAN_DECODE_ENTRY(44 ,12), |
|
613 HUFFMAN_DECODE_ENTRY(45 ,12), |
|
614 HUFFMAN_DECODE_ENTRY(46 ,12), |
|
615 HUFFMAN_DECODE_ENTRY(47 ,12), |
|
616 |
|
617 HUFFMAN_DECODE_ENTRY(57 ,12), |
|
618 HUFFMAN_DECODE_ENTRY(58 ,12), |
|
619 HUFFMAN_DECODE_ENTRY(61 ,12), |
|
620 HUFFMAN_DECODE_ENTRY(256 ,12), |
|
621 HUFFMAN_DECODE_ENTRY(16 ,10), |
|
622 HUFFMAN_DECODE_ENTRY(16 ,10), |
|
623 HUFFMAN_DECODE_ENTRY(16 ,10), |
|
624 HUFFMAN_DECODE_ENTRY(16 ,10) |
|
625 }; |
|
626 |
|
627 LOCAL_D const TUint16 Black0000_0110[16] = |
|
628 { |
|
629 HUFFMAN_DECODE_ENTRY(17 ,10), |
|
630 HUFFMAN_DECODE_ENTRY(17 ,10), |
|
631 HUFFMAN_DECODE_ENTRY(17 ,10), |
|
632 HUFFMAN_DECODE_ENTRY(17 ,10), |
|
633 HUFFMAN_DECODE_ENTRY(48 ,12), |
|
634 HUFFMAN_DECODE_ENTRY(49 ,12), |
|
635 HUFFMAN_DECODE_ENTRY(62 ,12), |
|
636 HUFFMAN_DECODE_ENTRY(63 ,12), |
|
637 |
|
638 HUFFMAN_DECODE_ENTRY(30 ,12), |
|
639 HUFFMAN_DECODE_ENTRY(31 ,12), |
|
640 HUFFMAN_DECODE_ENTRY(32 ,12), |
|
641 HUFFMAN_DECODE_ENTRY(33 ,12), |
|
642 HUFFMAN_DECODE_ENTRY(40 ,12), |
|
643 HUFFMAN_DECODE_ENTRY(41 ,12), |
|
644 HUFFMAN_DECODE_ENTRY(22 ,11), |
|
645 HUFFMAN_DECODE_ENTRY(22 ,11) |
|
646 }; |
|
647 |
|
648 LOCAL_D const TUint16 Black0000_0111[1] = |
|
649 { |
|
650 HUFFMAN_DECODE_ENTRY(14 ,8) |
|
651 }; |
|
652 |
|
653 LOCAL_D const TUint16 Black0000_100x[1] = |
|
654 { |
|
655 HUFFMAN_DECODE_ENTRY(10 ,7) |
|
656 }; |
|
657 |
|
658 LOCAL_D const TUint16 Black0000_101x[1] = |
|
659 { |
|
660 HUFFMAN_DECODE_ENTRY(11 ,7) |
|
661 }; |
|
662 |
|
663 LOCAL_D const TUint16 Black0000_1100[16] = |
|
664 { |
|
665 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
666 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
667 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
668 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
669 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
670 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
671 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
672 HUFFMAN_DECODE_ENTRY(15 ,9), |
|
673 |
|
674 HUFFMAN_DECODE_ENTRY(128 ,12), |
|
675 HUFFMAN_DECODE_ENTRY(192 ,12), |
|
676 HUFFMAN_DECODE_ENTRY(26 ,12), |
|
677 HUFFMAN_DECODE_ENTRY(27 ,12), |
|
678 HUFFMAN_DECODE_ENTRY(28 ,12), |
|
679 HUFFMAN_DECODE_ENTRY(29 ,12), |
|
680 HUFFMAN_DECODE_ENTRY(19 ,11), |
|
681 HUFFMAN_DECODE_ENTRY(19 ,11) |
|
682 }; |
|
683 |
|
684 LOCAL_D const TUint16 Black0000_1101[16] = |
|
685 { |
|
686 HUFFMAN_DECODE_ENTRY(20 ,11), |
|
687 HUFFMAN_DECODE_ENTRY(20 ,11), |
|
688 HUFFMAN_DECODE_ENTRY(34 ,12), |
|
689 HUFFMAN_DECODE_ENTRY(35 ,12), |
|
690 HUFFMAN_DECODE_ENTRY(36 ,12), |
|
691 HUFFMAN_DECODE_ENTRY(37 ,12), |
|
692 HUFFMAN_DECODE_ENTRY(38 ,12), |
|
693 HUFFMAN_DECODE_ENTRY(39 ,12), |
|
694 |
|
695 HUFFMAN_DECODE_ENTRY(21 ,11), |
|
696 HUFFMAN_DECODE_ENTRY(21 ,11), |
|
697 HUFFMAN_DECODE_ENTRY(42 ,12), |
|
698 HUFFMAN_DECODE_ENTRY(43 ,12), |
|
699 HUFFMAN_DECODE_ENTRY(0 ,10), |
|
700 HUFFMAN_DECODE_ENTRY(0 ,10), |
|
701 HUFFMAN_DECODE_ENTRY(0 ,10), |
|
702 HUFFMAN_DECODE_ENTRY(0 ,10) |
|
703 }; |
|
704 |
|
705 LOCAL_D const TUint16 Black0000_111x[1] = |
|
706 { |
|
707 HUFFMAN_DECODE_ENTRY(12 ,7) |
|
708 }; |
|
709 |
|
710 LOCAL_D const TUint16 Common0000_0001[16] = |
|
711 { |
|
712 HUFFMAN_DECODE_ENTRY(1792 ,11), |
|
713 HUFFMAN_DECODE_ENTRY(1792 ,11), |
|
714 HUFFMAN_DECODE_ENTRY(1984 ,12), |
|
715 HUFFMAN_DECODE_ENTRY(2048 ,12), |
|
716 HUFFMAN_DECODE_ENTRY(2112 ,12), |
|
717 HUFFMAN_DECODE_ENTRY(2176 ,12), |
|
718 HUFFMAN_DECODE_ENTRY(2240 ,12), |
|
719 HUFFMAN_DECODE_ENTRY(2304 ,12), |
|
720 HUFFMAN_DECODE_ENTRY(1856 ,11), |
|
721 HUFFMAN_DECODE_ENTRY(1856 ,11), |
|
722 HUFFMAN_DECODE_ENTRY(1920 ,11), |
|
723 HUFFMAN_DECODE_ENTRY(1920 ,11), |
|
724 HUFFMAN_DECODE_ENTRY(2368 ,12), |
|
725 HUFFMAN_DECODE_ENTRY(2432 ,12), |
|
726 HUFFMAN_DECODE_ENTRY(2496 ,12), |
|
727 HUFFMAN_DECODE_ENTRY(2560 ,12) |
|
728 }; |
|
729 |
|
730 class THuffmanTable |
|
731 { |
|
732 public: |
|
733 const TUint16* iCodes; |
|
734 TInt iIndexBits; // Number of bits to use for indexing into iCodes |
|
735 }; |
|
736 |
|
737 LOCAL_D const THuffmanTable WhiteTables[32] = |
|
738 { |
|
739 {White0000,4}, |
|
740 {White0001,4}, |
|
741 {White0010,4}, |
|
742 {White0011,4}, |
|
743 {White0100,5}, |
|
744 {White0101,4}, |
|
745 {White0110,5}, |
|
746 {White0111,0}, |
|
747 {White1000,0}, |
|
748 {White1001,1}, |
|
749 {White1010,2}, |
|
750 {White1011,0}, |
|
751 {White1100,0}, |
|
752 {White1101,2}, |
|
753 {White1110,0}, |
|
754 {White1111,0}, |
|
755 }; |
|
756 |
|
757 LOCAL_D const THuffmanTable BlackTables[16] = |
|
758 { |
|
759 {NULL,0}, |
|
760 {Black0001,2}, |
|
761 {Black0010,0}, |
|
762 {Black0011,0}, |
|
763 {Black010x,0}, |
|
764 {Black010x,0}, |
|
765 {Black011x,0}, |
|
766 {Black011x,0}, |
|
767 {Black10xx,0}, |
|
768 {Black10xx,0}, |
|
769 {Black10xx,0}, |
|
770 {Black10xx,0}, |
|
771 {Black11xx,0}, |
|
772 {Black11xx,0}, |
|
773 {Black11xx,0}, |
|
774 {Black11xx,0}, |
|
775 }; |
|
776 |
|
777 LOCAL_D const THuffmanTable BlackTables0000[16] = |
|
778 { |
|
779 {NULL,0}, |
|
780 {Common0000_0001,4}, |
|
781 {Black0000_0010,5}, |
|
782 {Black0000_0011,5}, |
|
783 {Black0000_0100,0}, |
|
784 {Black0000_0101,4}, |
|
785 {Black0000_0110,4}, |
|
786 {Black0000_0111,0}, |
|
787 {Black0000_100x,0}, |
|
788 {Black0000_100x,0}, |
|
789 {Black0000_101x,0}, |
|
790 {Black0000_101x,0}, |
|
791 {Black0000_1100,4}, |
|
792 {Black0000_1101,4}, |
|
793 {Black0000_111x,0}, |
|
794 {Black0000_111x,0}, |
|
795 }; |
|
796 |
|
797 TTiffFaxState CTiffFax1dDecoder::DecodeWhite() |
|
798 { |
|
799 TUint32 bits = iBitCache; |
|
800 TUint16 code; |
|
801 |
|
802 if(bits>=0x02000000) |
|
803 { |
|
804 const THuffmanTable* table = &WhiteTables[GetMostSignificantBits(bits,4)]; |
|
805 bits &= ~0xf0000000; // zero the 4 most significant bits |
|
806 code = table->iCodes[GetMostSignificantBits(bits,4+table->iIndexBits)]; |
|
807 } |
|
808 else if(bits>=0x01000000) |
|
809 { |
|
810 bits &= ~0xff000000; // zero the 8 most significant bits |
|
811 code = Common0000_0001[GetMostSignificantBits(bits,8+4)]; |
|
812 } |
|
813 else |
|
814 return(ETiffFaxInvalid); |
|
815 |
|
816 TInt numBits = code&15; |
|
817 |
|
818 if(numBits>iBitCacheLength) |
|
819 return(ETiffFaxUnderflow); |
|
820 |
|
821 UseBits(numBits); |
|
822 |
|
823 iCodeType = ETiffFaxWhiteRun; |
|
824 iCodeCount = code>>4; |
|
825 |
|
826 if(iCodeCount<64) |
|
827 iColor = ETiffFaxBlackRun; |
|
828 |
|
829 return(ETiffFaxPixelRun); |
|
830 } |
|
831 |
|
832 TTiffFaxState CTiffFax1dDecoder::DecodeBlack() |
|
833 { |
|
834 TUint32 bits = iBitCache; |
|
835 TUint16 code; |
|
836 |
|
837 if(bits&0xf0000000) |
|
838 { |
|
839 const THuffmanTable* table = &BlackTables[GetMostSignificantBits(bits,4)]; |
|
840 bits &= ~0xf0000000; // zero the 4 most significant bits |
|
841 code = table->iCodes[GetMostSignificantBits(bits,4+table->iIndexBits)]; |
|
842 } |
|
843 else if(bits&0xff000000) |
|
844 { |
|
845 const THuffmanTable* table = &BlackTables0000[GetMostSignificantBits(bits,8)]; |
|
846 bits &= ~0xff000000; // zero the 8 most significant bits |
|
847 code = table->iCodes[GetMostSignificantBits(bits,8+table->iIndexBits)]; |
|
848 } |
|
849 else |
|
850 return(ETiffFaxInvalid); |
|
851 |
|
852 TInt numBits = code&15; |
|
853 |
|
854 if(numBits>iBitCacheLength) |
|
855 return(ETiffFaxUnderflow); |
|
856 |
|
857 UseBits(numBits); |
|
858 |
|
859 iCodeType = ETiffFaxBlackRun; |
|
860 iCodeCount = code>>4; |
|
861 |
|
862 if(iCodeCount<64) |
|
863 iColor = ETiffFaxWhiteRun; |
|
864 |
|
865 return(ETiffFaxPixelRun); |
|
866 } |
|
867 |
|
868 TTiffFaxState CTiffFax1dDecoder::DecodeEndOfLine() |
|
869 { |
|
870 if(iBitCache>=0x00200000) |
|
871 return(ETiffFaxInvalid); |
|
872 |
|
873 FOREVER |
|
874 { |
|
875 if(iBitCacheLength<12) |
|
876 return(ETiffFaxUnderflow); |
|
877 if(iBitCache&0x00100000) |
|
878 break; |
|
879 UseBits(1); |
|
880 } |
|
881 |
|
882 UseBits(12); |
|
883 |
|
884 iColor = ETiffFaxWhiteRun; |
|
885 |
|
886 iCodeCount = 1; |
|
887 |
|
888 if(iCodeType==ETiffFaxEndOfLineCode) |
|
889 return(ETiffFaxEndOfFax); |
|
890 |
|
891 iCodeType = ETiffFaxEndOfLineCode; |
|
892 return(ETiffFaxEndOfLine); |
|
893 } |
|
894 |
|
895 |
|
896 // CTiffFax2dDecoder. |
|
897 CTiffFax2dDecoder::~CTiffFax2dDecoder() |
|
898 { |
|
899 delete []iReferenceRunData; |
|
900 } |
|
901 |
|
902 void CTiffFax2dDecoder::ConstructL(const TTiffImageData& aImageData) |
|
903 { |
|
904 CTiffFax1dDecoder::ConstructL(aImageData); |
|
905 iReferenceRunData = new (ELeave) TInt[iRowWidth+2]; |
|
906 } |
|
907 |
|
908 void CTiffFax2dDecoder::NewStripL(TInt aNumBytes) |
|
909 { |
|
910 CTiffFax1dDecoder::NewStripL(aNumBytes); |
|
911 CTiffFax2dDecoder::NewRow(); |
|
912 } |
|
913 |
|
914 void CTiffFax2dDecoder::NewRow() |
|
915 { |
|
916 if(iRunDataIndex&1) |
|
917 iRunDataIndex++; |
|
918 iRunData[iRunDataIndex] = iRowWidth; |
|
919 iRunData[iRunDataIndex+1] = iRowWidth; |
|
920 |
|
921 TInt* temp = iReferenceRunData; |
|
922 iReferenceRunData = iRunData; |
|
923 iRunData = temp; |
|
924 |
|
925 iReferenceRunDataIndex = 0; |
|
926 iHorizontalCodeCount = 0; |
|
927 iA0 = 0; |
|
928 |
|
929 CTiffFax1dDecoder::NewRow(); |
|
930 } |
|
931 |
|
932 TTiffFaxState CTiffFax2dDecoder::Decode2d() |
|
933 { |
|
934 if(iHorizontalCodeCount) |
|
935 return(DecodeHorizontal()); |
|
936 |
|
937 TUint32 bits = iBitCache; |
|
938 TInt validBits; |
|
939 TInt verticalOffset; |
|
940 |
|
941 switch(GetMostSignificantBits(bits,3)) |
|
942 { |
|
943 case 0: |
|
944 |
|
945 switch(GetMostSignificantBits(bits,7)) |
|
946 { |
|
947 case 0: |
|
948 case 1: |
|
949 return(DecodeEndOfLine()); |
|
950 case 2: |
|
951 verticalOffset = -3; |
|
952 validBits = 7; |
|
953 break; |
|
954 case 3: |
|
955 verticalOffset = 3; |
|
956 validBits = 7; |
|
957 break; |
|
958 case 4: |
|
959 case 5: |
|
960 verticalOffset = -2; |
|
961 validBits = 6; |
|
962 break; |
|
963 case 6: |
|
964 case 7: |
|
965 verticalOffset = 2; |
|
966 validBits = 6; |
|
967 break; |
|
968 default: |
|
969 if(iBitCacheLength<4) |
|
970 return(ETiffFaxUnderflow); |
|
971 UseBits(4); |
|
972 return(DecodePass()); |
|
973 } |
|
974 |
|
975 break; |
|
976 |
|
977 case 1: |
|
978 if(iBitCacheLength<3) |
|
979 return(ETiffFaxUnderflow); |
|
980 UseBits(3); |
|
981 iHorizontalCodeCount = 2; |
|
982 return(DecodeHorizontal()); |
|
983 |
|
984 case 2: |
|
985 |
|
986 verticalOffset = -1; |
|
987 validBits = 3; |
|
988 break; |
|
989 |
|
990 case 3: |
|
991 |
|
992 verticalOffset = 1; |
|
993 validBits = 3; |
|
994 break; |
|
995 |
|
996 default: |
|
997 |
|
998 verticalOffset = 0; |
|
999 validBits = 1; |
|
1000 break; |
|
1001 } |
|
1002 |
|
1003 if(validBits>iBitCacheLength) |
|
1004 return(ETiffFaxUnderflow); |
|
1005 |
|
1006 UseBits(validBits); |
|
1007 |
|
1008 return(DecodeVertical(verticalOffset)); |
|
1009 } |
|
1010 |
|
1011 TTiffFaxState CTiffFax2dDecoder::DecodeHorizontal() |
|
1012 { |
|
1013 TTiffFaxState returnValue; |
|
1014 |
|
1015 returnValue = Decode1d(); |
|
1016 if(returnValue!=ETiffFaxPixelRun) |
|
1017 return(returnValue); |
|
1018 |
|
1019 iA0 += iCodeCount; |
|
1020 |
|
1021 if(iCodeCount<64) |
|
1022 iHorizontalCodeCount--; |
|
1023 |
|
1024 if(iHorizontalCodeCount) |
|
1025 return(ETiffFaxPixelRun); |
|
1026 |
|
1027 TInt n = iA0; |
|
1028 if(n>=iRowWidth) |
|
1029 n = iRowWidth-1; |
|
1030 |
|
1031 TInt i = iReferenceRunDataIndex; |
|
1032 |
|
1033 while(iReferenceRunData[i]<=n) |
|
1034 i++; |
|
1035 |
|
1036 if(iColor==ETiffFaxBlackRun) |
|
1037 { |
|
1038 if(!(i&1)) |
|
1039 i++; |
|
1040 } |
|
1041 else |
|
1042 { |
|
1043 if(i&1) |
|
1044 i++; |
|
1045 } |
|
1046 |
|
1047 iReferenceRunDataIndex = i; |
|
1048 |
|
1049 return(ETiffFaxPixelRun); |
|
1050 } |
|
1051 |
|
1052 TTiffFaxState CTiffFax2dDecoder::DecodeVertical(TInt aDifference) |
|
1053 { |
|
1054 iA0 = iReferenceRunData[iReferenceRunDataIndex]+aDifference; |
|
1055 |
|
1056 iCodeCount = iA0-iPixelsStoredInRow; |
|
1057 iCodeType = iColor; |
|
1058 |
|
1059 if(iColor==ETiffFaxWhiteRun) |
|
1060 iColor = ETiffFaxBlackRun; |
|
1061 else |
|
1062 iColor = ETiffFaxWhiteRun; |
|
1063 |
|
1064 TInt n = iA0; |
|
1065 if(n>=iRowWidth) |
|
1066 n = iRowWidth-1; |
|
1067 |
|
1068 TInt i = iReferenceRunDataIndex; |
|
1069 |
|
1070 if(i) |
|
1071 i--; |
|
1072 else |
|
1073 i++; |
|
1074 |
|
1075 while(iReferenceRunData[i]<=n) |
|
1076 i += 2; |
|
1077 |
|
1078 iReferenceRunDataIndex = i; |
|
1079 |
|
1080 return(ETiffFaxPixelRun); |
|
1081 } |
|
1082 |
|
1083 TTiffFaxState CTiffFax2dDecoder::DecodePass() |
|
1084 { |
|
1085 iA0 = iReferenceRunData[iReferenceRunDataIndex+1]; |
|
1086 iReferenceRunDataIndex += 2; |
|
1087 |
|
1088 iCodeCount = iA0-iPixelsStoredInRow; |
|
1089 iCodeType = iColor; |
|
1090 |
|
1091 return(ETiffFaxPixelRun); |
|
1092 } |
|
1093 |
|
1094 |
|
1095 // CTiffGroup3Fax1dDecoder. |
|
1096 CTiffGroup3Fax1dDecoder* CTiffGroup3Fax1dDecoder::NewL(const TTiffImageData& aImageData) |
|
1097 { |
|
1098 if(aImageData.iT4Options & ~TTiffIfdEntry::ET4ContainsPaddedEols) |
|
1099 User::Leave(KErrNotSupported); |
|
1100 |
|
1101 CTiffGroup3Fax1dDecoder* decoder = new (ELeave) CTiffGroup3Fax1dDecoder; |
|
1102 |
|
1103 CleanupStack::PushL(decoder); |
|
1104 decoder->ConstructL(aImageData); |
|
1105 CleanupStack::Pop(); |
|
1106 |
|
1107 return(decoder); |
|
1108 } |
|
1109 |
|
1110 TTiffFaxState CTiffGroup3Fax1dDecoder::ProcessNextCode() |
|
1111 { |
|
1112 return(Decode1d()); |
|
1113 } |
|
1114 |
|
1115 |
|
1116 // CTiffGroup3Fax2dDecoder. |
|
1117 CTiffGroup3Fax2dDecoder* CTiffGroup3Fax2dDecoder::NewL(const TTiffImageData& aImageData) |
|
1118 { |
|
1119 if( (aImageData.iT4Options&~TTiffIfdEntry::ET4ContainsPaddedEols) != TTiffIfdEntry::ET4TwoDimentionalCoding ) |
|
1120 User::Leave(KErrNotSupported); |
|
1121 |
|
1122 CTiffGroup3Fax2dDecoder* decoder = new (ELeave) CTiffGroup3Fax2dDecoder; |
|
1123 |
|
1124 CleanupStack::PushL(decoder); |
|
1125 decoder->ConstructL(aImageData); |
|
1126 CleanupStack::Pop(); |
|
1127 |
|
1128 return(decoder); |
|
1129 } |
|
1130 |
|
1131 void CTiffGroup3Fax2dDecoder::NewStripL(TInt aNumBytes) |
|
1132 { |
|
1133 CTiffFax2dDecoder::NewStripL(aNumBytes); |
|
1134 iState = E1d; |
|
1135 } |
|
1136 |
|
1137 TTiffFaxState CTiffGroup3Fax2dDecoder::ProcessNextCode() |
|
1138 { |
|
1139 if(iState!=ESelect1d2d) |
|
1140 { |
|
1141 TTiffFaxState returnValue; |
|
1142 |
|
1143 if(iState==E1d) |
|
1144 returnValue = Decode1d(); |
|
1145 else |
|
1146 returnValue = Decode2d(); |
|
1147 |
|
1148 if(returnValue!=ETiffFaxEndOfLine) |
|
1149 return(returnValue); |
|
1150 |
|
1151 iState = ESelect1d2d; |
|
1152 } |
|
1153 |
|
1154 if(!iBitCacheLength) |
|
1155 return(ETiffFaxUnderflow); |
|
1156 |
|
1157 if(iBitCache&(1<<31)) |
|
1158 iState = E1d; |
|
1159 else |
|
1160 iState = E2d; |
|
1161 |
|
1162 UseBits(1); |
|
1163 |
|
1164 return(ETiffFaxEndOfLine); |
|
1165 } |
|
1166 |
|
1167 void CTiffGroup3Fax2dDecoder::NewRow() |
|
1168 { |
|
1169 if(iState==E1d) |
|
1170 CTiffFax1dDecoder::NewRow(); |
|
1171 else |
|
1172 CTiffFax2dDecoder::NewRow(); |
|
1173 } |
|
1174 |
|
1175 |
|
1176 // CTiffGroup4FaxDecoder. |
|
1177 CTiffGroup4FaxDecoder* CTiffGroup4FaxDecoder::NewL(const TTiffImageData& aImageData) |
|
1178 { |
|
1179 if(aImageData.iT6Options!=0) |
|
1180 User::Leave(KErrNotSupported); |
|
1181 |
|
1182 CTiffGroup4FaxDecoder* decoder = new (ELeave) CTiffGroup4FaxDecoder; |
|
1183 |
|
1184 CleanupStack::PushL(decoder); |
|
1185 decoder->ConstructL(aImageData); |
|
1186 CleanupStack::Pop(); |
|
1187 |
|
1188 return(decoder); |
|
1189 } |
|
1190 |
|
1191 TTiffFaxState CTiffGroup4FaxDecoder::ProcessNextCode() |
|
1192 { |
|
1193 if((iA0==iRowWidth) && (iHorizontalCodeCount==0)) |
|
1194 return(ETiffFaxEndOfLine); |
|
1195 |
|
1196 return(Decode2d()); |
|
1197 } |
|
1198 |