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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 <barsc.h> |
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17 #include <barsread.h> |
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18 #include <bautils.h> |
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19 #include <imageconversion.h> |
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20 #include "ImageClientMain.h" |
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21 #include <101F45CD_extra.rsg> |
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22 #include "icl/ICL_UIDS.hrh" |
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23 #ifdef SYMBIAN_ENABLE_SPLIT_HEADERS |
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24 #include <icl/icl_uids_const.hrh> |
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25 #include <icl/icl_uids_def.hrh> |
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26 #include <icl/imagecodecdef.h> |
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27 #endif |
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28 #include "WBMPCodec.h" |
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29 |
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30 // Constants. |
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31 const TInt KWbmpMaxFileHeaderSize = 12; // Max possible header size for TInt32 width and height values |
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32 const TInt KWbmpMinFileHeaderSize = 4; // Min possible header size for TUint8 width and height values |
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33 |
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34 _LIT(KWBMPPanicCategory, "WBMPConvertPlugin"); |
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35 |
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36 // Global panic function |
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37 GLDEF_C void Panic(TIclPanic aError) |
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38 { |
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39 User::Panic(KWBMPPanicCategory, aError); |
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40 } |
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41 |
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42 |
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43 // Wbmp decoder. |
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44 CWbmpDecoder* CWbmpDecoder::NewL() |
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45 { |
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46 return new(ELeave) CWbmpDecoder; |
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47 } |
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48 |
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49 CWbmpDecoder::CWbmpDecoder() |
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50 {} |
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51 |
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52 CWbmpDecoder::~CWbmpDecoder() |
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53 { |
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54 Cleanup(); |
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55 } |
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56 |
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57 void CWbmpDecoder::ImageType(TInt aFrameNumber, TUid& aImageType, TUid& aImageSubType) const |
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58 { |
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59 __ASSERT_ALWAYS(aFrameNumber == 0, Panic(EFrameNumberOutOfRange)); |
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60 aImageType = KImageTypeWBMPUid; |
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61 aImageSubType = KNullUid; |
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62 } |
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63 |
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64 // Scan header. |
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65 // Validate that format is correct. |
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66 // Create codec. |
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67 // Fill in image info. (All frames) |
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68 void CWbmpDecoder::ScanDataL() |
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69 { |
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70 ReadFormatL(); |
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71 |
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72 ASSERT(ImageReadCodec() == NULL); |
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73 |
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74 CWbmpReadCodec* imageReadCodec = CWbmpReadCodec::NewL(iSize); |
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75 |
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76 SetImageReadCodec(imageReadCodec); |
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77 |
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78 ReadFrameHeadersL(); |
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79 } |
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80 |
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81 void CWbmpDecoder::ReadFormatL() |
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82 { |
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83 TPtrC8 bufferDes; |
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84 |
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85 ReadDataL(0, bufferDes, KWbmpMaxFileHeaderSize); |
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86 |
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87 // Validate the header. |
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88 if (bufferDes.Length() < KWbmpMinFileHeaderSize) |
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89 User::Leave(KErrUnderflow); |
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90 |
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91 const TUint8* ptr = &bufferDes[0]; |
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92 const TUint8* startPtr = ptr; |
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93 const TUint8* endPtr = startPtr + bufferDes.Length(); |
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94 |
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95 TUint8 typeField = *ptr++; |
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96 if (typeField != 0) |
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97 User::Leave(KErrNotSupported); |
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98 |
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99 // TUint8 fixHeaderField = *ptr++; |
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100 ptr++; // Skip fixHeaderField |
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101 |
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102 iSize.iWidth = ReadContinuedValueL(ptr, endPtr); |
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103 iSize.iHeight = ReadContinuedValueL(ptr, endPtr); |
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104 |
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105 TInt headerSize = ptr - startPtr; |
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106 SetStartPosition(headerSize); // KWbmpFileHeaderSize ?? |
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107 |
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108 SetDataLength(headerSize + (((iSize.iWidth + 7) / 8) * iSize.iHeight)); |
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109 |
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110 TFrameInfo imageInfo; |
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111 imageInfo = ImageInfo(); |
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112 imageInfo.iFrameCoordsInPixels.SetRect(TPoint(0, 0), iSize); |
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113 imageInfo.iOverallSizeInPixels = iSize; |
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114 imageInfo.iFrameSizeInTwips = TSize(0, 0); |
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115 imageInfo.iBitsPerPixel = 1; |
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116 imageInfo.iDelay = 0; |
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117 imageInfo.iFlags = 0; |
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118 imageInfo.iFrameDisplayMode = EGray2; |
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119 SetImageInfo(imageInfo); |
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120 } |
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121 |
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122 CFrameInfoStrings* CWbmpDecoder::FrameInfoStringsL(RFs& aFs, TInt aFrameNumber) |
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123 { |
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124 |
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125 const TUid KWbmpCodecDllUid = {KWBMPCodecDllUidValue}; |
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126 |
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127 RResourceFile resourceFile; |
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128 OpenExtraResourceFileLC(aFs,KWbmpCodecDllUid,resourceFile); |
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129 |
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130 HBufC8* resourceInfo = resourceFile.AllocReadLC(THEDECODERINFO); |
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131 TResourceReader resourceReader; |
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132 resourceReader.SetBuffer(resourceInfo); |
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133 |
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134 TBuf<KCodecResourceStringMax> info; |
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135 TBuf<KCodecResourceStringMax> templte; |
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136 |
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137 const TFrameInfo& frameInfo = FrameInfo(aFrameNumber); |
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138 CFrameInfoStrings* frameInfoStrings = CFrameInfoStrings::NewLC(); |
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139 |
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140 info = resourceReader.ReadTPtrC(); |
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141 frameInfoStrings->SetDecoderL(info); |
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142 |
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143 info = resourceReader.ReadTPtrC(); |
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144 frameInfoStrings->SetFormatL(info); |
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145 |
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146 TInt width = frameInfo.iOverallSizeInPixels.iWidth; |
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147 TInt height = frameInfo.iOverallSizeInPixels.iHeight; |
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148 |
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149 templte = resourceReader.ReadTPtrC(); |
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150 info.Format(templte, width, height); |
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151 frameInfoStrings->SetDimensionsL(info); |
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152 |
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153 info = resourceReader.ReadTPtrC(); // note depth is fixed |
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154 frameInfoStrings->SetDepthL(info); |
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155 |
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156 // leave details blank |
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157 |
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158 CleanupStack::Pop(frameInfoStrings); |
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159 CleanupStack::PopAndDestroy(2); // resourceInfo + resourceFile |
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160 return frameInfoStrings; |
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161 } |
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162 |
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163 |
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164 TInt CWbmpDecoder::ReadContinuedValueL(const TUint8*& aPtr, const TUint8* aEndPtr) |
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165 { |
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166 TUint32 value = 0; |
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167 TInt concatenation; |
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168 TInt bytecount = 0; |
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169 do |
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170 { |
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171 if (aPtr == aEndPtr) |
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172 { |
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173 User::Leave(KErrUnderflow); |
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174 } |
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175 |
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176 if ( bytecount > sizeof(TUint32) ) |
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177 { |
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178 User::Leave(KErrCorrupt); |
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179 break; |
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180 } |
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181 value <<= 7; |
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182 value |= (aPtr[0] & 0x7f); |
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183 if ( value > KWBmpMaxImageSize ) |
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184 { |
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185 User::Leave(KErrCorrupt); |
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186 break; |
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187 } |
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188 concatenation = (aPtr[0] & 0x80); |
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189 aPtr++; |
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190 bytecount++; |
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191 } |
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192 while (concatenation); |
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193 if ( value > KWBmpMaxImageSize ) |
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194 { |
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195 User::Leave(KErrCorrupt); |
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196 } |
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197 return value; |
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198 } |
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199 |
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200 |
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201 |