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1 /* |
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2 * Copyright (c) 2006 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: Implementation of CMPXImageUtil. |
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15 * |
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16 */ |
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17 |
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18 // INCLUDE FILES |
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19 #include <e32std.h> |
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20 #include <e32base.h> |
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21 #include <bitmaptransforms.h> |
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22 #include <mda/common/video.h> |
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23 #include <eikenv.h> |
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24 #include <icl/imagedata.h> |
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25 #include <imageconversion.h> |
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26 #include <IclExtJpegApi.h> |
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27 |
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28 #include "mpximageutil.h" |
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29 |
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30 //This value is used to stretch so the image fills the container. |
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31 const TReal MaxStretchRatio = 1.1f; |
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32 |
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33 LOCAL_C TInt Stretch (TInt aValue, TInt aLimit) |
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34 { |
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35 TInt ret( aValue * MaxStretchRatio ); |
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36 ret = (ret>aLimit) ? aLimit : ret; |
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37 return ret; |
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38 } |
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39 |
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40 // ============================ MEMBER FUNCTIONS =============================== |
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41 |
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42 |
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43 // ----------------------------------------------------------------------------- |
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44 // Two-phased constructor. |
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45 // ----------------------------------------------------------------------------- |
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46 // |
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47 CMPXImageUtil* CMPXImageUtil::NewL( |
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48 MMPXAlbumArtUtilObserver& aObserver) |
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49 { |
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50 CMPXImageUtil* self = new ( ELeave ) CMPXImageUtil(aObserver); |
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51 CleanupStack::PushL( self ); |
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52 self->ConstructL(); |
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53 CleanupStack::Pop(); // self |
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54 return self; |
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55 } |
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56 |
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57 // ----------------------------------------------------------------------------- |
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58 // C++ default constructor can NOT contain any code, that |
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59 // might leave. |
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60 // ----------------------------------------------------------------------------- |
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61 // |
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62 CMPXImageUtil::CMPXImageUtil(MMPXAlbumArtUtilObserver& aObserver) |
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63 : CActive(EPriorityStandard), iObserver(aObserver) |
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64 { |
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65 iBitmap = NULL; |
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66 iState = EIdle; |
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67 } |
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68 |
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69 // ----------------------------------------------------------------------------- |
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70 // Symbian 2nd phase constructor can leave. |
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71 // ----------------------------------------------------------------------------- |
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72 // |
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73 void CMPXImageUtil::ConstructL() |
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74 { |
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75 iScaler = CBitmapScaler::NewL(); |
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76 User::LeaveIfError(iFs.Connect()); |
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77 CActiveScheduler::Add( this ); |
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78 } |
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79 |
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80 // ----------------------------------------------------------------------------- |
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81 // Destructor |
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82 // ----------------------------------------------------------------------------- |
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83 // |
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84 CMPXImageUtil::~CMPXImageUtil() |
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85 { |
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86 Cancel(); |
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87 delete iImageDecoder; // CImageDecoder must be deleted before the |
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88 delete iScaler; |
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89 iFs.Close(); |
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90 delete iImageData; |
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91 } |
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92 |
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93 // ----------------------------------------------------------------------------- |
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94 // Starts to decode an image from a file. |
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95 // ----------------------------------------------------------------------------- |
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96 // |
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97 void CMPXImageUtil::StartToDecodeL(const TDesC& aFileName, |
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98 const TSize& aSize, |
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99 TDisplayMode aDisplayMode /*=EColor64K*/) |
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100 { |
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101 if(iState) |
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102 { |
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103 User::Leave(KErrNotReady); |
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104 } |
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105 |
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106 delete iImageDecoder; |
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107 iImageDecoder = NULL; |
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108 delete iBitmap; |
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109 iBitmap = NULL; |
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110 delete iImageData; |
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111 iImageData = NULL; |
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112 |
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113 // create the decoder |
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114 |
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115 TRAPD( err, iImageDecoder = CExtJpegDecoder::FileNewL( |
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116 CExtJpegDecoder::EHwImplementation, |
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117 iFs, |
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118 aFileName, |
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119 CImageDecoder::EOptionNone ) ); |
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120 if (KErrNone != err) |
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121 { |
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122 TRAP(err,iImageDecoder = CExtJpegDecoder::FileNewL( |
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123 CExtJpegDecoder::ESwImplementation, |
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124 iFs, |
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125 aFileName, |
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126 CImageDecoder::EOptionNone ) ); |
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127 if (KErrNone != err) |
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128 { |
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129 iImageDecoder = CImageDecoder::FileNewL( |
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130 iFs, |
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131 aFileName, |
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132 CImageDecoder::EOptionNone); |
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133 } |
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134 } |
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135 |
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136 // Get image size |
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137 TSize bitmapSize = CalculateDecodeSize(aSize); |
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138 // create the destination bitmap |
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139 iBitmap = new (ELeave) CFbsBitmap(); |
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140 User::LeaveIfError(iBitmap->Create(bitmapSize, aDisplayMode)); |
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141 |
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142 // start conversion to bitmap |
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143 iState = EDecoding; |
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144 iImageDecoder->Convert(&iStatus, *iBitmap); |
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145 |
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146 iObserver.ExtractAlbumArtStarted(); |
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147 SetActive(); |
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148 } |
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149 |
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150 // ----------------------------------------------------------------------------- |
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151 // CMPXImageUtil::DoCancel |
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152 // Implementation of CActive |
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153 // ----------------------------------------------------------------------------- |
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154 // |
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155 void CMPXImageUtil::DoCancel() |
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156 { |
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157 switch ( iState ) |
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158 { |
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159 case EDecoding: |
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160 { |
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161 iImageDecoder->Cancel(); |
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162 // need to delete bitmap as we have are still the owner until the |
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163 // operation completes |
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164 if ( iBitmap ) |
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165 { |
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166 delete iBitmap; |
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167 iBitmap = NULL; |
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168 } |
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169 break; |
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170 } |
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171 case EScaling: |
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172 { |
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173 iScaler->Cancel(); |
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174 if ( iBitmap ) |
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175 { |
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176 delete iBitmap; |
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177 iBitmap = NULL; |
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178 } |
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179 break; |
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180 } |
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181 default: // No Asynchronous events are taking place, do nothing. |
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182 { |
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183 break; |
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184 } |
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185 } |
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186 |
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187 delete iImageData; |
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188 iImageData = NULL; |
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189 delete iImageDecoder; |
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190 iImageDecoder = NULL; |
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191 } |
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192 |
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193 // ----------------------------------------------------------------------------- |
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194 // Implementation of CActive |
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195 // ----------------------------------------------------------------------------- |
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196 // |
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197 void CMPXImageUtil::RunL() |
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198 { |
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199 TInt deleteDecoder( ETrue ); |
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200 switch( iState ) |
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201 { |
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202 case EDecoding: |
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203 { |
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204 if( iStatus == KErrNone ) |
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205 { |
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206 if ( !iScaleRquired ) |
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207 { |
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208 iState = EIdle; |
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209 iObserver.ExtractAlbumArtCompleted(iBitmap,KErrNone); |
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210 iBitmap = NULL; |
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211 } |
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212 else |
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213 { |
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214 deleteDecoder = EFalse; |
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215 ScaleL(); |
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216 } |
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217 break; |
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218 } |
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219 else |
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220 { |
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221 // some error |
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222 if ( iBitmap ) |
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223 { |
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224 delete iBitmap; |
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225 iBitmap = NULL; |
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226 } |
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227 iState = EIdle; |
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228 iObserver.ExtractAlbumArtCompleted(iBitmap, iStatus.Int()); |
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229 break; |
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230 } |
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231 } |
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232 case EScaling: |
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233 { |
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234 iState = EIdle; |
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235 iObserver.ExtractAlbumArtCompleted(iBitmap,iStatus.Int()); |
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236 iBitmap = NULL; |
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237 } |
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238 break; |
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239 |
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240 default: // some error |
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241 { |
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242 iState = EIdle; |
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243 if ( iBitmap ) |
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244 { |
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245 delete iBitmap; |
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246 iBitmap = NULL; |
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247 } |
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248 iObserver.ExtractAlbumArtCompleted(iBitmap,iStatus.Int()); |
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249 break; |
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250 } |
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251 } |
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252 |
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253 // It's safe to destroy iImageData here |
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254 delete iImageData; |
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255 iImageData = NULL; |
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256 |
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257 if ( deleteDecoder ) |
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258 { |
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259 delete iImageDecoder; |
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260 iImageDecoder = NULL; |
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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 // Scales iBitmap by iSize |
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266 // ----------------------------------------------------------------------------- |
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267 // |
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268 void CMPXImageUtil::ScaleL() |
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269 { |
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270 iScaler->Scale(&iStatus, *iBitmap, iSize, EFalse); |
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271 iState = EScaling; |
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272 SetActive(); |
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273 } |
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274 |
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275 // ----------------------------------------------------------------------------- |
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276 // Starts to decode an image from a buffer. |
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277 // ----------------------------------------------------------------------------- |
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278 // |
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279 void CMPXImageUtil::StartToDecodeL( const TSize& aSize, |
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280 HBufC8* aAlbumArt, TDisplayMode aDisplayMode/*=EColor64K*/ ) |
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281 { |
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282 if(iState) |
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283 { |
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284 User::Leave( KErrNotReady ); |
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285 } |
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286 |
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287 delete iImageDecoder; |
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288 iImageDecoder = NULL; |
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289 delete iBitmap; |
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290 iBitmap = NULL; |
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291 delete iImageData; |
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292 iImageData = NULL; |
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293 // storing the pointer to aAlbumArt, ownership was transferred to us. |
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294 iImageData = aAlbumArt; |
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295 // create the decoder |
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296 |
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297 |
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298 TRAPD( err, iImageDecoder = CExtJpegDecoder::DataNewL( |
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299 CExtJpegDecoder::EHwImplementation, |
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300 iFs, |
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301 *iImageData, |
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302 CImageDecoder::EOptionNone ) ); |
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303 if ( KErrNone != err ) |
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304 { |
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305 TRAP(err,iImageDecoder = CExtJpegDecoder::DataNewL( |
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306 CExtJpegDecoder::ESwImplementation, |
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307 iFs, |
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308 *iImageData, |
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309 CImageDecoder::EOptionNone ) ); |
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310 if ( KErrNone != err ) |
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311 { |
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312 iImageDecoder = CImageDecoder::DataNewL( |
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313 iFs, |
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314 *iImageData, |
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315 CImageDecoder::EOptionNone ); |
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316 } |
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317 } |
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318 |
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319 |
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320 |
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321 |
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322 TSize bitmapSize = CalculateDecodeSize( aSize ); |
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323 |
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324 // create the destination bitmap |
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325 iBitmap = new ( ELeave ) CFbsBitmap(); |
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326 User::LeaveIfError( iBitmap->Create( bitmapSize, aDisplayMode ) ); |
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327 // start conversion to bitmap |
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328 iState = EDecoding; |
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329 iImageDecoder->Convert( &iStatus, *iBitmap ); |
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330 |
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331 iObserver.ExtractAlbumArtStarted(); |
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332 SetActive(); |
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333 } |
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334 // ----------------------------------------------------------------------------- |
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335 // Calculates the decode size and prepares members for scaling. |
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336 // ----------------------------------------------------------------------------- |
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337 // |
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338 TSize CMPXImageUtil::CalculateDecodeSize(const TSize& aSize) |
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339 { |
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340 const TFrameInfo& frameInfo = iImageDecoder->FrameInfo(); |
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341 TSize bitmapSize = frameInfo.iOverallSizeInPixels; |
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342 TReal sourceAspectRatio( TReal( bitmapSize.iWidth) / bitmapSize.iHeight ); |
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343 TReal destinationAspectRatio( TReal( aSize.iWidth ) / aSize.iHeight ); |
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344 TReal xScale = TReal( bitmapSize.iWidth ) / aSize.iWidth; |
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345 TReal yScale = TReal( bitmapSize.iHeight ) / aSize.iHeight; |
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346 TReal scale(0.0f); |
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347 |
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348 if ( sourceAspectRatio > destinationAspectRatio ) |
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349 { |
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350 scale = xScale; |
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351 iSize.iWidth = aSize.iWidth; |
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352 iSize.iHeight = Stretch( TReal( bitmapSize.iHeight ) / scale , |
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353 aSize.iHeight ); |
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354 } |
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355 else |
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356 { |
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357 scale = yScale; |
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358 iSize.iWidth = Stretch( TReal( bitmapSize.iWidth ) / scale , |
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359 aSize.iWidth); |
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360 iSize.iHeight = aSize.iHeight; |
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361 } |
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362 |
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363 if ((frameInfo.iFlags & TFrameInfo::EFullyScaleable)) |
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364 { |
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365 iScaleRquired = EFalse; |
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366 bitmapSize = iSize; |
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367 } |
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368 else |
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369 //Decoder only supports 2, 4 and 8 scallyng, the image will need |
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370 //to be reescaled after decoding. |
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371 //Decoding to a scale that is just a bit bigger thant the target, |
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372 //this will save memory and resources and we will get a sharp image |
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373 //after scaling. |
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374 { |
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375 TInt intscale = ( scale >= 8 ) ? 8 : |
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376 ( scale >= 4 ) ? 4 : |
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377 ( scale >= 2 ) ? 2 : 1; |
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378 TUint xCorrection = ( bitmapSize.iWidth % intscale ) ? 1 : 0; |
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379 TUint yCorrection = ( bitmapSize.iHeight % intscale ) ? 1 : 0; |
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380 bitmapSize.iWidth /= intscale; |
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381 bitmapSize.iHeight /= intscale; |
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382 bitmapSize += TSize( xCorrection, yCorrection ); |
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383 iScaleRquired = ETrue; |
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384 } |
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385 return bitmapSize; |
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386 } |
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387 |
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388 // ----------------------------------------------------------------------------- |
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389 // CMPXImageUtil::CancelRequest |
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390 // Cancel Asynch requests |
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391 // ----------------------------------------------------------------------------- |
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392 // |
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393 void CMPXImageUtil::CancelRequest() |
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394 { |
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395 Cancel(); |
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396 } |
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397 |
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398 // End of File |