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1 /* |
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2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Downscales images when needed |
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15 * |
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16 */ |
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17 |
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18 |
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19 // INCLUDE FILES |
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20 #include "cpimimagescaler.h" |
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21 #include "logger.h" |
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22 |
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23 // ============================ MEMBER FUNCTIONS =============================== |
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24 |
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25 // ----------------------------------------------------------------------------- |
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26 // CPIMImageScaler::CPIMImageScaler |
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27 // C++ default constructor can NOT contain any code, that |
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28 // might leave. |
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29 // ----------------------------------------------------------------------------- |
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30 // |
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31 CPIMImageScaler::CPIMImageScaler() : |
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32 CActive(EPriorityStandard), iState(EReady), iError(KErrNone), |
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33 iFbsSessionConnected(EFalse) |
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34 { |
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35 JELOG2(EPim); |
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36 // Add object to the active scheduler |
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37 CActiveScheduler::Add(this); |
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38 } |
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39 |
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40 // ----------------------------------------------------------------------------- |
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41 // CPIMImageScaler::ConstructL |
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42 // Second phase constructor |
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43 // ----------------------------------------------------------------------------- |
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44 // |
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45 void CPIMImageScaler::ConstructL() |
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46 { |
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47 JELOG2(EPim); |
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48 User::LeaveIfError(iFileServer.Connect()); |
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49 } |
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50 |
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51 // ----------------------------------------------------------------------------- |
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52 // CPIMImageScaler::Complete |
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53 // Performs various cleanups |
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54 // ----------------------------------------------------------------------------- |
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55 // |
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56 void CPIMImageScaler::Complete(TInt aError) |
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57 { |
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58 JELOG2(EPim); |
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59 if (KErrNone == aError) |
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60 { |
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61 iState = ECompleted; |
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62 } |
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63 else |
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64 { |
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65 iError = aError; |
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66 iState = EError; |
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67 } |
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68 iWait->AsyncStop(); |
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69 } |
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70 |
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71 // ----------------------------------------------------------------------------- |
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72 // CPIMImageScaler::NewL |
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73 // Two-phased constructor. |
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74 // ----------------------------------------------------------------------------- |
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75 // |
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76 CPIMImageScaler* CPIMImageScaler::NewL() |
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77 { |
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78 JELOG2(EPim); |
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79 CPIMImageScaler* self = new(ELeave) CPIMImageScaler; |
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80 CleanupStack::PushL(self); |
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81 self->ConstructL(); |
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82 CleanupStack::Pop(self); |
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83 return self; |
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84 } |
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85 |
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86 // Destructor |
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87 CPIMImageScaler::~CPIMImageScaler() |
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88 { |
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89 JELOG2(EPim); |
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90 delete iImageReader; |
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91 delete iImageWriter; |
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92 delete iBitmapScaler; |
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93 delete iBitmap; |
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94 if (iFbsSessionConnected) |
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95 { |
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96 RFbsSession::Disconnect(); |
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97 } |
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98 delete iImage; |
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99 delete iWait; |
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100 iFileServer.Close(); |
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101 } |
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102 |
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103 // ----------------------------------------------------------------------------- |
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104 // CPIMImageScaler::ScaleL |
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105 // Opens a JPEG image, checks its size and scales to 80x96 if larger. |
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106 // ----------------------------------------------------------------------------- |
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107 // |
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108 HBufC8* CPIMImageScaler::ScaleL(TDesC8& aSrcImage) |
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109 { |
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110 JELOG2(EPim); |
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111 __ASSERT_ALWAYS(iState == EReady, User::Leave(KErrNotReady)); |
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112 // First we create the decoder to read the image |
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113 CImageDecoder* imageReader = NULL; |
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114 TRAPD(err, imageReader = CImageDecoder::DataNewL(iFileServer, aSrcImage)); |
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115 if (err == KErrNoMemory) |
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116 { |
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117 User::Leave(err); |
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118 } |
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119 else if (err != KErrNone) |
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120 { |
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121 User::Leave(KErrAbort); |
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122 } |
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123 |
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124 delete iImageReader; |
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125 iImageReader = imageReader; |
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126 // we create bitmap for the raw image |
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127 const TFrameInfo& frameInfo = iImageReader->FrameInfo(); |
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128 if (!CheckSize(frameInfo.iOverallSizeInPixels)) |
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129 { |
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130 // we don't have to resize |
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131 delete iImageReader; |
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132 iImageReader = NULL; |
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133 return aSrcImage.AllocL(); |
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134 } |
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135 |
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136 if (!iFbsSessionConnected) |
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137 { |
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138 User::LeaveIfError(RFbsSession::Connect()); |
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139 iFbsSessionConnected = ETrue; |
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140 } |
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141 if (!iBitmap) |
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142 { |
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143 iBitmap = new(ELeave) CFbsBitmap; |
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144 } |
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145 iBitmap->Create(frameInfo.iOverallSizeInPixels, frameInfo.iFrameDisplayMode); |
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146 |
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147 // We create the encoder as well |
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148 CImageEncoder* imageWriter = CImageEncoder::DataNewL(iImage, |
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149 CImageEncoder::EOptionNone, KImageTypeJPGUid); |
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150 delete iImageWriter; |
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151 iImageWriter = imageWriter; |
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152 // and scaler |
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153 if (!iBitmapScaler) |
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154 { |
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155 iBitmapScaler = CBitmapScaler::NewL(); |
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156 } |
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157 if (!iWait) |
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158 { |
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159 iWait = new(ELeave) CActiveSchedulerWait; |
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160 } |
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161 |
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162 iState = EOpening; |
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163 iImageReader->Convert(&iStatus, *iBitmap); |
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164 SetActive(); |
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165 iWait->Start(); |
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166 |
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167 // These can't be reused |
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168 delete iBitmap; |
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169 iBitmap = NULL; |
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170 delete iImageReader; |
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171 iImageReader = NULL; |
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172 delete iImageWriter; |
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173 iImageWriter = NULL; |
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174 |
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175 if (ECompleted != iState) |
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176 { |
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177 if (iState == EError) |
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178 { |
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179 User::Leave(iError); |
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180 } |
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181 else |
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182 { |
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183 User::Leave(KErrUnknown); |
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184 } |
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185 } |
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186 HBufC8* retVal = iImage; |
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187 iImage = NULL; |
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188 iState = EReady; |
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189 return retVal; |
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190 } |
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191 |
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192 // ----------------------------------------------------------------------------- |
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193 // CPIMImageScaler::CheckSize |
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194 // Checks image size and resizes if necessary |
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195 // ----------------------------------------------------------------------------- |
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196 // |
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197 TBool CPIMImageScaler::CheckSize(TSize aSize) |
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198 { |
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199 JELOG2(EPim); |
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200 if ((aSize.iHeight > KThumbHeight) || (aSize.iWidth > KThumbWidth)) |
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201 { |
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202 // need to resize |
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203 return ETrue; |
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204 } |
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205 return EFalse; |
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206 } |
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207 |
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208 // ----------------------------------------------------------------------------- |
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209 // CPIMImageScaler::Encode |
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210 // Encodes the image |
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211 // ----------------------------------------------------------------------------- |
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212 // |
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213 void CPIMImageScaler::Encode() |
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214 { |
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215 JELOG2(EPim); |
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216 iState = EEncoding; |
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217 iImageWriter->Convert(&iStatus, *iBitmap); |
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218 SetActive(); |
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219 } |
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220 |
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221 // ----------------------------------------------------------------------------- |
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222 // CPIMImageScaler::RunL |
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223 // Active object run method |
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224 // ----------------------------------------------------------------------------- |
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225 // |
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226 void CPIMImageScaler::RunL() |
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227 { |
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228 JELOG2(EPim); |
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229 if (iStatus != KErrNone) |
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230 { |
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231 // Error has occured; inform java |
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232 Complete(iStatus.Int()); |
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233 } |
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234 else |
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235 { |
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236 switch (iState) |
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237 { |
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238 case EOpening: |
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239 { |
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240 TSize KThumbSize(KThumbWidth, KThumbHeight); |
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241 iState = EScaling; |
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242 iBitmapScaler->Scale(&iStatus, *iBitmap, KThumbSize, ETrue); |
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243 SetActive(); |
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244 break; |
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245 } |
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246 case EScaling: |
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247 { |
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248 Encode(); |
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249 break; |
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250 } |
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251 case EEncoding: |
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252 { |
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253 Complete(KErrNone); |
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254 break; |
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255 } |
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256 default: |
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257 { |
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258 // unknown state |
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259 __ASSERT_DEBUG(EFalse, User::Invariant()); |
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260 } |
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261 } |
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262 } |
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263 } |
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264 |
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265 // ----------------------------------------------------------------------------- |
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266 // CPIMImageScaler::DoCancel |
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267 // Active object cancel method |
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268 // ----------------------------------------------------------------------------- |
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269 void CPIMImageScaler::DoCancel() |
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270 { |
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271 JELOG2(EPim); |
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272 if (iBitmapScaler) |
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273 { |
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274 iBitmapScaler->Cancel(); |
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275 } |
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276 if (iImageReader) |
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277 { |
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278 iImageReader->Cancel(); |
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279 } |
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280 if (iImageWriter) |
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281 { |
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282 iImageWriter->Cancel(); |
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283 } |
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284 iState = EReady; |
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285 } |
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286 |
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287 // End of File |