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: Utility class for asynchronously decoding the header thumbnail image |
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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 "cvimpstdetailsimagedecoder.h" |
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20 |
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21 #include "cvimpstdetailsheadercontrol.h" |
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22 |
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23 #include <cbsbitmap.h> |
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24 #include <imageconversion.h> |
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25 #include <bitmaptransforms.h> |
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26 |
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27 // --------------------------------------------------------------------------- |
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28 // CVIMPSTDetailsImageDecoder::NewL |
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29 // Two-phase construction |
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30 // --------------------------------------------------------------------------- |
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31 // |
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32 CVIMPSTDetailsImageDecoder* CVIMPSTDetailsImageDecoder::NewL(CVIMPSTDetailsHeaderControl& aHeader, const TDesC8& aBitmapData) |
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33 { |
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34 CVIMPSTDetailsImageDecoder* self = new (ELeave) CVIMPSTDetailsImageDecoder(aHeader); |
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35 CleanupStack::PushL(self); |
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36 self->ConstructL(aBitmapData); |
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37 CleanupStack::Pop(self); |
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38 return self; |
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39 } |
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40 |
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41 // --------------------------------------------------------------------------- |
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42 // CVIMPSTDetailsImageDecoder::CVIMPSTDetailsImageDecoder |
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43 // First phase (C++) constructor |
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44 // --------------------------------------------------------------------------- |
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45 // |
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46 CVIMPSTDetailsImageDecoder::CVIMPSTDetailsImageDecoder(CVIMPSTDetailsHeaderControl& aHeader) : |
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47 CActive( CActive::EPriorityStandard ), iHeader(aHeader) |
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48 { |
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49 CActiveScheduler::Add(this); |
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50 } |
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51 |
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52 // --------------------------------------------------------------------------- |
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53 // CVIMPSTDetailsImageDecoder::ConstructL |
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54 // ConstructL, second phase constructor |
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55 // --------------------------------------------------------------------------- |
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56 // |
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57 void CVIMPSTDetailsImageDecoder::ConstructL(const TDesC8& aBitmapData) |
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58 { |
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59 iBitmapData = aBitmapData.AllocL(); |
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60 User::LeaveIfError( iFs.Connect() ); |
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61 } |
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62 |
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63 // --------------------------------------------------------------------------- |
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64 // CVIMPSTDetailsImageDecoder::~CVIMPSTDetailsImageDecoder |
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65 // --------------------------------------------------------------------------- |
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66 // |
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67 CVIMPSTDetailsImageDecoder::~CVIMPSTDetailsImageDecoder() |
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68 { |
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69 DoCancel(); |
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70 if (iImgDecoder) |
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71 { |
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72 delete iImgDecoder; |
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73 iImgDecoder = NULL; |
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74 } |
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75 if (iBitmap) |
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76 { |
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77 delete iBitmap; |
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78 iBitmap = NULL; |
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79 } |
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80 if (iBitmapData) |
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81 { |
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82 delete iBitmapData; |
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83 iBitmapData = NULL; |
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84 } |
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85 if (iBitmapScaler) |
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86 { |
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87 delete iBitmapScaler; |
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88 iBitmapScaler = NULL; |
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89 } |
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90 |
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91 iFs.Close(); |
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92 } |
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93 |
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94 // --------------------------------------------------------------------------- |
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95 // CVIMPSTDetailsImageDecoder::Start |
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96 // Starts the decoding process |
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97 // --------------------------------------------------------------------------- |
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98 // |
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99 void CVIMPSTDetailsImageDecoder::StartL(TSize aBitmapSize) |
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100 { |
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101 iDecoderState = ECcaConvertThumbnailImage; |
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102 iBitmapSize = aBitmapSize; |
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103 CreateBitmapL(); |
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104 } |
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105 |
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106 // --------------------------------------------------------------------------- |
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107 // CVIMPSTDetailsImageDecoder::RunL |
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108 // Called by the active object framework when the decoding (request) is |
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109 // completed. |
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110 // --------------------------------------------------------------------------- |
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111 // |
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112 void CVIMPSTDetailsImageDecoder::RunL() |
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113 { |
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114 User::LeaveIfError( iStatus.Int() ); |
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115 switch ( iDecoderState ) |
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116 { |
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117 case ECcaConvertThumbnailImage: |
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118 { |
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119 iDecoderState = ECcaScaleThumbnail; |
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120 ScaleBitmapL(); |
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121 break; |
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122 } |
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123 case ECcaScaleThumbnail: |
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124 { |
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125 // don't delete |
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126 // Ownership of the bitmap is transferred |
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127 iHeader.SetBitmap(iBitmap, NULL ); |
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128 iBitmap = NULL; |
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129 } |
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130 default: |
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131 break; |
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132 } |
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133 |
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134 } |
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135 |
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136 // --------------------------------------------------------------------------- |
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137 // CVIMPSTDetailsImageDecoder::DoCancel |
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138 // Called when the decoding (request) is cancelled for some reason. |
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139 // --------------------------------------------------------------------------- |
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140 // |
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141 void CVIMPSTDetailsImageDecoder::DoCancel() |
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142 { |
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143 iImgDecoder->Cancel(); |
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144 } |
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145 |
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146 // --------------------------------------------------------------------------- |
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147 // CVIMPSTDetailsImageDecoder::ScaleBitmapL |
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148 // scaling it to fit to the screen |
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149 // --------------------------------------------------------------------------- |
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150 // |
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151 void CVIMPSTDetailsImageDecoder::ScaleBitmapL() |
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152 { |
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153 iBitmapScaler = CBitmapScaler::NewL(); |
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154 iBitmapScaler->Scale( &iStatus, *iBitmap, iBitmapSize ); |
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155 SetActive(); |
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156 } |
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157 |
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158 // --------------------------------------------------------------------------- |
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159 // CVIMPSTDetailsImageDecoder::CreateBitmapL |
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160 // creates the bitmap |
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161 // --------------------------------------------------------------------------- |
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162 // |
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163 |
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164 void CVIMPSTDetailsImageDecoder::CreateBitmapL() |
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165 { |
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166 if ( iDecoderState == ECcaConvertThumbnailImage ) |
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167 { |
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168 iImgDecoder = CImageDecoder::DataNewL( iFs, *iBitmapData, CImageDecoder::EOptionAlwaysThread ); |
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169 } |
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170 if ( !iBitmap ) |
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171 { |
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172 TFrameInfo info = iImgDecoder->FrameInfo(); |
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173 iBitmap = new ( ELeave ) CFbsBitmap; |
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174 User::LeaveIfError( iBitmap->Create( info.iOverallSizeInPixels, info.iFrameDisplayMode )); |
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175 } |
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176 iStatus = KRequestPending; |
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177 iImgDecoder->Convert( &iStatus, *iBitmap ); |
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178 SetActive(); |
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179 } |
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180 // end of file |
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