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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 <101F45F1_extra.rsg> |
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21 #include "PPM1Codec.h" |
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22 #include "PPM1Panic.h" |
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23 #include "PPMDecs.h" |
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24 #include "PPM1Uids.hrh" |
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25 |
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26 _LIT(KPPM1PanicCategory, "PPM1ConvertPlugin"); |
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27 |
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28 |
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29 // Global panic function |
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30 GLDEF_C void Panic(TInt aError) |
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31 { |
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32 User::Panic(KPPM1PanicCategory, aError); |
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33 } |
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34 |
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35 |
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36 // decoder. |
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37 CPpmDecoder* CPpmDecoder::NewL() |
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38 { |
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39 return new (ELeave) CPpmDecoder; |
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40 } |
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41 |
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42 CPpmDecoder::CPpmDecoder() |
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43 {} |
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44 |
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45 CPpmDecoder::~CPpmDecoder() |
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46 { |
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47 delete iExtensionManager; |
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48 Cleanup(); |
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49 } |
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50 |
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51 void CPpmDecoder::ImageType(TInt aFrameNumber, TUid& aImageType, TUid& aImageSubType) const |
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52 { |
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53 __ASSERT_ALWAYS(aFrameNumber == 0, Panic(EFrameNumberOutOfRange)); |
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54 aImageType = KImageTypePpmUid; |
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55 aImageSubType = KNullUid; |
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56 } |
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57 |
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58 // Scan header. |
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59 // Validate that format is correct. |
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60 // Create codec. |
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61 // Fill in image info. (All frames) |
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62 void CPpmDecoder::ScanDataL() |
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63 { |
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64 ReadFormatL(); |
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65 |
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66 ASSERT(ImageReadCodec() == NULL); |
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67 CPpmReadCodec* imageReadCodec = CPpmReadCodec::NewL(*this); |
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68 SetImageReadCodec(imageReadCodec); |
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69 |
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70 if (!iExtensionManager) |
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71 { |
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72 // Manager settings persist over all frames. |
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73 iExtensionManager = CPluginExtensionManager::NewL(imageReadCodec); |
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74 } |
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75 else |
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76 { |
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77 // Maintain manager settings, but reset the codec that it points to. |
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78 iExtensionManager->ResetCodecExtension(imageReadCodec); |
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79 } |
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80 |
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81 imageReadCodec->SetExtensionManager(iExtensionManager); |
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82 |
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83 ReadFrameHeadersL(); |
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84 } |
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85 |
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86 const TInt KPpmFileHeaderSize = 512; // use a high figure to get around possible comments - assumes high enough |
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87 |
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88 void CPpmDecoder::ReadFormatL() |
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89 { |
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90 TPtrC8 bufferDes; |
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91 |
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92 ReadDataL(0, bufferDes, KPpmFileHeaderSize); |
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93 |
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94 TLex8 lex (bufferDes); |
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95 TRAPD(error, InternalizeHeaderL(lex)); |
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96 |
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97 if (error!=KErrNone) |
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98 { |
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99 if (error==KErrGeneral) // treat as if underflow - means expected integers were not present |
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100 { |
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101 error = KErrUnderflow; |
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102 } |
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103 User::Leave(error); |
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104 } |
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105 } |
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106 |
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107 void CPpmDecoder::InternalizeHeaderL(TLex8& aLex) |
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108 { |
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109 SetInComment(EFalse); // since we read from the top, always assume is clear |
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110 |
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111 // first check we have either P3 or P6 at top of file |
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112 TChar char1 = aLex.Get(); |
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113 if (char1!='P') |
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114 { |
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115 User::Leave(KErrNotSupported); |
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116 } |
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117 TChar char2 = aLex.Get(); |
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118 if (char2=='3') |
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119 { |
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120 SetCompressed(EFalse); |
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121 } |
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122 else if (char2=='6') |
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123 { |
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124 SetCompressed(ETrue); |
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125 } |
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126 else |
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127 { |
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128 User::Leave(KErrNotSupported); |
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129 } |
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130 |
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131 SkipCommentAndWhiteSpaceL(aLex); |
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132 |
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133 TInt width; |
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134 User::LeaveIfError(aLex.Val(width)); |
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135 |
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136 SkipCommentAndWhiteSpaceL(aLex); |
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137 |
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138 TInt height; |
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139 User::LeaveIfError(aLex.Val(height)); |
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140 |
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141 SkipCommentAndWhiteSpaceL(aLex); |
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142 |
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143 TInt maxValue; |
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144 User::LeaveIfError(aLex.Val(maxValue)); |
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145 if (maxValue>255) |
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146 { |
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147 User::Leave(KErrNotSupported); |
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148 } |
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149 |
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150 TInt bitsPerPixel, power; |
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151 for (bitsPerPixel=1, power=2; maxValue>power-1; power<<=1, bitsPerPixel+=1) |
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152 /*loop*/; |
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153 |
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154 if (Compressed()) |
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155 { |
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156 aLex.Inc(); // skip over just the end of line |
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157 } |
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158 |
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159 // we are now pointing at the data |
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160 |
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161 SetStartPosition(aLex.Offset()); |
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162 SetDataLength(KMaxTInt); // we don't know image size, so set big |
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163 |
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164 TSize size = TSize(width, height); |
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165 iMaxValue = maxValue; |
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166 |
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167 TFrameInfo imageInfo = ImageInfo(); |
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168 imageInfo.iFrameCoordsInPixels.SetRect(TPoint(0, 0), size); |
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169 imageInfo.iOverallSizeInPixels = size; |
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170 imageInfo.iFrameSizeInTwips = TSize(0, 0); |
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171 imageInfo.iBitsPerPixel = bitsPerPixel; |
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172 imageInfo.iDelay = 0; |
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173 imageInfo.iFlags = TFrameInfo::EColor|TFrameInfo::ECanDither; |
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174 TDisplayMode mode; |
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175 if (bitsPerPixel<=4) // we always have rgb values |
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176 { |
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177 mode=EColor4K; |
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178 } |
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179 else |
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180 { |
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181 mode=EColor16M; |
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182 } |
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183 imageInfo.iFrameDisplayMode = mode; |
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184 SetImageInfo(imageInfo); |
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185 |
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186 iDataShift = 8 - bitsPerPixel; // correct everything to 0..255 |
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187 ASSERT(iDataShift>=0); |
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188 } |
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189 |
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190 // looks for white space or comment, and will skip if found |
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191 void CPpmDecoder::SkipCommentAndWhiteSpaceL(TLex8& aLex) |
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192 { |
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193 if (InComment()) |
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194 { |
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195 DoSkipCommentL(aLex); |
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196 } |
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197 for (;;) |
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198 { |
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199 ASSERT(!InComment()); |
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200 TChar peek = aLex.Peek(); |
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201 if (peek==0) // overflowed end of descriptor |
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202 { |
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203 User::Leave(KErrUnderflow); |
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204 } |
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205 else if (peek.IsSpace()) |
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206 { |
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207 aLex.SkipSpace(); |
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208 } |
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209 else if (peek=='#') // comment - skip to end of line |
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210 { |
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211 DoSkipCommentL(aLex); |
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212 } |
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213 else |
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214 { |
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215 break; |
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216 } |
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217 } |
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218 } |
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219 |
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220 // we are in comment, so skip to end of line. If do not get there, register the fact |
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221 void CPpmDecoder::DoSkipCommentL(TLex8& aLex) |
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222 { |
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223 TChar ch; |
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224 do |
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225 { |
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226 ch = aLex.Get(); |
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227 } |
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228 while (ch != '\n'); |
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229 if (ch==0) // reached end of descriptor |
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230 { |
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231 SetInComment(ETrue); |
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232 User::Leave(KErrUnderflow); |
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233 } |
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234 else |
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235 { |
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236 SetInComment(EFalse); |
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237 } |
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238 } |
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239 |
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240 |
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241 CFrameInfoStrings* CPpmDecoder::FrameInfoStringsL(RFs& aFs, TInt aFrameNumber) |
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242 { |
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243 if (aFrameNumber!=0) |
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244 { |
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245 User::Leave(KErrArgument); |
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246 } |
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247 |
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248 const TUid ppmCodecDllUid = {KPpm1DecoderDllUidValue}; |
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249 |
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250 RResourceFile resourceFile; |
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251 OpenExtraResourceFileLC(aFs,ppmCodecDllUid,resourceFile); |
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252 |
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253 HBufC8* resourceInfo = resourceFile.AllocReadLC(THEDECODERINFO); |
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254 TResourceReader resourceReader; |
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255 resourceReader.SetBuffer(resourceInfo); |
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256 |
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257 TBuf<128> info; |
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258 TBuf<128> templte; |
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259 |
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260 CFrameInfoStrings* frameInfoStrings = CFrameInfoStrings::NewLC(); |
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261 |
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262 info = resourceReader.ReadTPtrC(); |
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263 frameInfoStrings->SetDecoderL(info); |
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264 |
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265 info = resourceReader.ReadTPtrC(); |
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266 frameInfoStrings->SetFormatL(info); |
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267 |
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268 templte = resourceReader.ReadTPtrC(); |
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269 const TFrameInfo& frameInfo = FrameInfo(aFrameNumber); |
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270 const TSize& size = frameInfo.iOverallSizeInPixels; |
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271 info.Format(templte, size.iWidth, size.iHeight); |
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272 frameInfoStrings->SetDimensionsL(info); |
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273 |
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274 templte = resourceReader.ReadTPtrC(); |
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275 info.Format(templte, iMaxValue); |
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276 frameInfoStrings->SetDepthL(info); |
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277 |
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278 CDesCArrayFlat* resourceArray = resourceReader.ReadDesCArrayL(); |
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279 CleanupStack::PushL(resourceArray); |
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280 TUint formatIndex = Compressed() ? 1 : 0; |
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281 info = (*resourceArray)[formatIndex]; |
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282 CleanupStack::PopAndDestroy(resourceArray); |
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283 frameInfoStrings->SetDetailsL(info); |
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284 |
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285 CleanupStack::Pop(frameInfoStrings); |
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286 CleanupStack::PopAndDestroy(2); // resourceInfo + resourceFile |
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287 return frameInfoStrings; |
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288 } |
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289 |
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290 void CPpmDecoder::GetExtensionL(TUid aExtUid, MImageConvExtension*& aExtPtr) |
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291 { |
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292 ASSERT(iExtensionManager); |
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293 if(!Compressed()) |
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294 { |
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295 User::Leave(KErrNotSupported); |
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296 } |
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297 iExtensionManager->GetExtensionL(aExtUid, aExtPtr); |
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298 } |
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299 |
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300 void CPpmDecoder::SetClippingRectL(const TRect* aClipRect) |
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301 { |
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302 if(!Compressed()) |
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303 { |
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304 User::Leave(KErrNotSupported); |
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305 } |
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306 |
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307 RPointerArray<TFrameInfo> frameInfo; |
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308 CleanupClosePushL(frameInfo); |
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309 |
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310 // PPM only has a single frame |
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311 frameInfo.AppendL(&FrameInfo(0)); |
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312 |
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313 // The clipping operation is reset by passing a NULL rect pointer. |
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314 ASSERT(iExtensionManager); |
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315 iExtensionManager->SetClippingRectL(aClipRect, frameInfo); |
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316 CleanupStack::PopAndDestroy(); // frameInfo |
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317 } |
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318 |
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319 TInt CPpmDecoder::GetDestinationSize(TSize& aSize, TInt aFrameNumber) |
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320 { |
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321 ASSERT(iExtensionManager); |
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322 const TFrameInfo frameInfo = FrameInfo(aFrameNumber); |
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323 TSize originalSize = frameInfo.iOverallSizeInPixels; |
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324 TInt err = iExtensionManager->GetDestinationSize(originalSize); |
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325 if(err == KErrNone) |
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326 { |
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327 aSize = originalSize; |
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328 } |
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329 return err; |
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330 } |
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331 |
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332 // PNG encoder |
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333 CPpmEncoder* CPpmEncoder::NewL() |
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334 { |
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335 return new(ELeave) CPpmEncoder; |
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336 } |
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337 |
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338 CPpmEncoder::CPpmEncoder() |
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339 { |
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340 } |
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341 |
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342 CPpmEncoder::~CPpmEncoder() |
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343 { |
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344 CImageEncoderPlugin::Cleanup(); |
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345 } |
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346 |
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347 void CPpmEncoder::PrepareEncoderL(const CFrameImageData* /*aFrameImageData*/) |
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348 { |
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349 CPpm1WriteCodec* codec = CPpm1WriteCodec::NewL(); |
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350 SetImageWriteCodec(codec); // takes ownership of imageReadCodec |
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351 } |
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352 |
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353 void CPpmEncoder::UpdateHeaderL() |
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354 { |
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355 } |
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356 |
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357 #ifndef EKA2 |
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358 |
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359 // DLL entry point |
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360 GLDEF_C TInt E32Dll(TDllReason /*aReason*/) |
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361 { |
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362 return KErrNone; |
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363 } |
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364 |
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365 #endif // EKA2 |
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366 |