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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: Private image loader to convert binary array into usable 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 // INCLUDES |
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20 #include "AknPrivateImageLoader.h" |
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21 #include <imageconversion.h> |
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22 #include <eikenv.h> |
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23 #include <f32file.h> |
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24 #include <e32debug.h> |
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25 #include <eikimage.h> |
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26 #include <AknIconUtils.h> |
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27 #include <SVGEngineInterfaceImpl.h> |
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28 |
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29 /// Max bitmap dimension (heigth or width) which is allowed to be loaded |
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30 const TInt KMaxDecodeSize = 300; |
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31 |
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32 /// Debug print macro |
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33 #ifdef _DEBUG |
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34 #define RDEBUG( args... ) RDebug::Printf( args ) |
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35 #else |
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36 #define RDEBUG( args... ) |
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37 #endif |
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38 |
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39 // ======== MEMBER FUNCTIONS ======== |
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40 // --------------------------------------------------------------------------- |
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41 // CAknPrivateImageLoader::CAknPrivateImageLoader |
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42 // --------------------------------------------------------------------------- |
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43 // |
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44 CAknPrivateImageLoader::CAknPrivateImageLoader( |
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45 RFs& aFs, |
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46 MAknPrivateImageLoaderObserver& aObserver ) : |
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47 CActive( EPriorityStandard ), |
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48 iObserver( aObserver ), |
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49 iFs( aFs ) |
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50 { |
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51 CActiveScheduler::Add( this ); |
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52 } |
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53 |
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54 // --------------------------------------------------------------------------- |
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55 // CAknPrivateImageLoader::ConstructL |
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56 // --------------------------------------------------------------------------- |
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57 // |
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58 void CAknPrivateImageLoader::ConstructL() |
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59 { |
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60 } |
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61 |
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62 // --------------------------------------------------------------------------- |
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63 // CAknPrivateImageLoader::NewL |
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64 // --------------------------------------------------------------------------- |
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65 // |
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66 CAknPrivateImageLoader* CAknPrivateImageLoader::NewL( |
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67 RFs& aFs, |
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68 MAknPrivateImageLoaderObserver& aObserver ) |
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69 { |
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70 CAknPrivateImageLoader* self = |
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71 CAknPrivateImageLoader::NewLC( aFs, aObserver ); |
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72 CleanupStack::Pop( self ); |
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73 return self; |
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74 } |
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75 |
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76 // --------------------------------------------------------------------------- |
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77 // CAknPrivateImageLoader::NewLC |
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78 // --------------------------------------------------------------------------- |
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79 // |
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80 CAknPrivateImageLoader* CAknPrivateImageLoader::NewLC( |
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81 RFs& aFs, |
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82 MAknPrivateImageLoaderObserver& aObserver ) |
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83 { |
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84 CAknPrivateImageLoader* self = |
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85 new( ELeave ) CAknPrivateImageLoader( aFs, aObserver ); |
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86 CleanupStack::PushL( self ); |
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87 self->ConstructL(); |
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88 return self; |
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89 } |
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90 |
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91 // --------------------------------------------------------------------------- |
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92 // CAknPrivateImageLoader::~CAknPrivateImageLoader |
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93 // --------------------------------------------------------------------------- |
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94 // |
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95 CAknPrivateImageLoader::~CAknPrivateImageLoader() |
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96 { |
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97 Cancel(); |
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98 delete iDecoder; |
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99 delete iIcon; |
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100 } |
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101 |
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102 // --------------------------------------------------------------------------- |
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103 // CAknPrivateImageLoader::LoadIconL |
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104 // --------------------------------------------------------------------------- |
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105 // |
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106 void CAknPrivateImageLoader::LoadIconL( |
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107 const TDesC8& aImageData, |
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108 TSize aSize ) |
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109 { |
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110 Cancel(); |
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111 |
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112 // try to load bitmap |
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113 TRAPD( err, LoadL( aImageData, aSize ) ); |
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114 |
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115 if( err == KErrTooBig ) |
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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 ) |
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120 { |
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121 // Decoder can't open it -> try to load as SVG image |
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122 LoadSVGImageL( aImageData, aSize ); |
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123 } |
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124 } |
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125 |
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126 // --------------------------------------------------------------------------- |
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127 // CAknPrivateImageLoader::RunL |
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128 // --------------------------------------------------------------------------- |
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129 // |
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130 void CAknPrivateImageLoader::RunL() |
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131 { |
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132 // Compress the heap after image conversion as image decoder |
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133 // seems to leave heap uncompressed |
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134 if( iDecoder ) |
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135 { |
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136 delete iDecoder; |
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137 iDecoder = NULL; |
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138 User::Heap().Compress(); |
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139 } |
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140 |
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141 // check errors |
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142 TInt status = iStatus.Int(); |
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143 if( status < KErrNone ) |
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144 { |
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145 // Image load failed |
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146 RDEBUG( "CAknPrivateImageLoader::RunL: image load error %d", status ); |
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147 |
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148 delete iIcon; |
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149 iIcon = NULL; |
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150 |
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151 iObserver.ImageLoadError( status ); |
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152 // don't use member variables after callback, since this instance |
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153 // might be deleted |
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154 } |
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155 else |
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156 { |
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157 // Image load success |
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158 ASSERT( iIcon ); |
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159 |
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160 // generate dummy mask if image didn't have one. |
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161 CFbsBitmap* mask = iIcon->Mask(); |
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162 if( !mask ) |
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163 { |
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164 CFbsBitmap* genMask = |
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165 GenerateMaskLC( iIcon->Bitmap()->SizeInPixels() ); |
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166 iIcon->SetMask( genMask ); |
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167 CleanupStack::Pop( genMask ); |
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168 } |
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169 |
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170 // 1 bit masks needs to be inverted |
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171 else if( mask->DisplayMode() == EGray2 ) |
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172 { |
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173 InvertImageL( *mask ); |
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174 } |
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175 |
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176 // create scalable image |
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177 CAknIcon* icon = iIcon; |
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178 iIcon = NULL; |
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179 iIcon = CreateIconL( icon ); // takes ownership (leave safe) |
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180 |
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181 CEikImage* image = new(ELeave) CEikImage; |
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182 image->SetPicture( iIcon->Bitmap(), iIcon->Mask() ); |
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183 |
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184 // remove ownership from iIcon |
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185 iIcon->SetBitmap( NULL ); |
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186 iIcon->SetMask( NULL ); |
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187 |
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188 delete iIcon; |
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189 iIcon = NULL; |
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190 |
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191 iObserver.ImageLoadSuccess( image ); // ownership given |
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192 // don't use member variables after callback, since this instance |
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193 // might be deleted |
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194 } |
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195 } |
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196 |
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197 // --------------------------------------------------------------------------- |
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198 // CAknPrivateImageLoader::RunError |
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199 // --------------------------------------------------------------------------- |
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200 // |
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201 TInt CAknPrivateImageLoader::RunError( TInt aError ) |
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202 { |
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203 RDEBUG( "CAknPrivateImageLoader::RunError: image load error %d", aError ); |
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204 |
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205 delete iIcon; |
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206 iIcon = NULL; |
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207 |
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208 iObserver.ImageLoadError( aError ); |
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209 // don't use member variables after callback, since this instance |
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210 // might be deleted |
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211 |
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212 return KErrNone; |
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213 } |
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214 |
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215 |
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216 // --------------------------------------------------------------------------- |
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217 // CAknPrivateImageLoader::DoCancel |
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218 // --------------------------------------------------------------------------- |
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219 // |
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220 void CAknPrivateImageLoader::DoCancel() |
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221 { |
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222 if( iDecoder ) |
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223 { |
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224 iDecoder->Cancel(); |
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225 delete iDecoder; |
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226 iDecoder = NULL; |
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227 } |
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228 } |
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229 |
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230 // --------------------------------------------------------------------------- |
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231 // CAknPrivateImageLoader::InvertImageL |
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232 // --------------------------------------------------------------------------- |
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233 // |
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234 void CAknPrivateImageLoader::InvertImageL( CFbsBitmap& aBitmap ) |
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235 { |
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236 TDisplayMode mode = aBitmap.DisplayMode(); |
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237 TInt width = aBitmap.SizeInPixels().iWidth; |
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238 TInt height = aBitmap.SizeInPixels().iHeight; |
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239 |
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240 HBufC8* buf = HBufC8::NewLC( aBitmap.ScanLineLength( width, mode ) ); |
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241 TPtr8 bufPtr( buf->Des() ); |
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242 |
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243 for( TInt i = 0; i < height; ++i ) |
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244 { |
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245 aBitmap.GetScanLine( bufPtr, TPoint( 0, i ), width, mode ); |
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246 TInt len = bufPtr.Length(); |
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247 for( TInt j = 0; j < len; ++j ) |
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248 { |
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249 bufPtr[j] ^= 0xff; |
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250 } |
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251 aBitmap.SetScanLine( bufPtr, i ); |
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252 } |
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253 |
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254 CleanupStack::PopAndDestroy( buf ); |
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255 } |
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256 |
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257 // --------------------------------------------------------------------------- |
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258 // CAknPrivateImageLoader::CreateIconL |
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259 // --------------------------------------------------------------------------- |
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260 // |
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261 CAknIcon* CAknPrivateImageLoader::CreateIconL( CAknIcon* aIcon ) |
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262 { |
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263 CAknIcon* result = NULL; |
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264 if( aIcon->Mask() ) |
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265 { |
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266 result = AknIconUtils::CreateIconL( aIcon ); // deletes icon in case of leave |
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267 } |
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268 else |
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269 { |
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270 // aMask is NULL |
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271 CFbsBitmap* image = aIcon->Bitmap(); |
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272 aIcon->SetBitmap( NULL ); |
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273 CleanupStack::PushL( aIcon ); |
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274 image = AknIconUtils::CreateIconL( image ); // deletes image in case of leave |
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275 CleanupStack::Pop( aIcon ); |
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276 aIcon->SetBitmap( image ); |
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277 result = aIcon; |
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278 } |
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279 |
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280 return result; // ownership given to caller |
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281 } |
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282 |
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283 // --------------------------------------------------------------------------- |
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284 // CAknPrivateImageLoader::LoadL |
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285 // --------------------------------------------------------------------------- |
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286 // |
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287 void CAknPrivateImageLoader::LoadL( const TDesC8& aImageData, TSize aSize ) |
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288 { |
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289 delete iDecoder; |
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290 iDecoder = NULL; |
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291 |
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292 // default loader |
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293 iDecoder = CImageDecoder::DataNewL( iFs, aImageData, |
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294 CImageDecoder::EAllowGeneratedMask ); |
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295 |
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296 TFrameInfo info( iDecoder->FrameInfo() ); |
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297 TSize& frameSize( info.iFrameSizeInPixels ); |
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298 if( frameSize.iHeight > KMaxDecodeSize || |
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299 frameSize.iWidth > KMaxDecodeSize ) |
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300 { |
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301 RDEBUG("CAknPrivateImageLoader::LoadLC err: image larger than %dx%d", |
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302 KMaxDecodeSize, KMaxDecodeSize ); |
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303 User::Leave( KErrTooBig ); |
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304 } |
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305 |
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306 CAknIcon* icon = CAknIcon::NewL(); |
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307 CleanupStack::PushL( icon ); |
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308 icon->SetBitmap( new( ELeave ) CFbsBitmap() ); |
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309 |
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310 TSize decodeSize( DecodeSize( info, aSize ) ); |
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311 |
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312 User::LeaveIfError( icon->Bitmap()->Create( |
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313 decodeSize, info.iFrameDisplayMode ) ); |
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314 |
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315 if ( info.iFlags & TFrameInfo::ETransparencyPossible ) |
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316 { |
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317 // Transparency available -> use mask |
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318 icon->SetMask( new( ELeave ) CFbsBitmap() ); |
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319 User::LeaveIfError( icon->Mask()->Create( decodeSize, |
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320 info.iFlags & TFrameInfo::EAlphaChannel ? EGray256 : EGray2 ) ); |
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321 } |
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322 |
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323 // start processing |
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324 if( icon->Mask() ) |
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325 { |
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326 iDecoder->Convert( &iStatus, *icon->Bitmap(), *icon->Mask() ); |
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327 } |
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328 else |
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329 { |
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330 iDecoder->Convert( &iStatus, *icon->Bitmap() ); |
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331 } |
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332 |
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333 CleanupStack::Pop( icon ); |
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334 delete iIcon; |
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335 iIcon = icon; |
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336 |
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337 // wait for completion |
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338 SetActive(); |
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339 } |
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340 |
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341 // --------------------------------------------------------------------------- |
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342 // CAknPrivateImageLoader::LoadSVGImageL |
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343 // --------------------------------------------------------------------------- |
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344 // |
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345 void CAknPrivateImageLoader::LoadSVGImageL( |
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346 const TDesC8& aImageData, |
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347 TSize aSize ) |
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348 { |
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349 CFbsBitmap* dummy = new(ELeave) CFbsBitmap(); |
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350 CleanupStack::PushL( dummy ); |
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351 TFontSpec spec; |
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352 CSvgEngineInterfaceImpl* svgEngine = |
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353 CSvgEngineInterfaceImpl::NewL( dummy, NULL, spec ); |
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354 CleanupStack::PushL( svgEngine ); |
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355 |
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356 TInt handle = KErrNotFound; |
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357 LeaveIfErrorL( svgEngine->PrepareDom( aImageData, handle ) ); |
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358 |
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359 CAknIcon* icon = CAknIcon::NewL(); |
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360 CleanupStack::PushL( icon ); |
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361 icon->SetBitmap( new(ELeave) CFbsBitmap() ); |
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362 |
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363 // create image bitmap |
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364 TDisplayMode mode( EColor64K ); // default value |
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365 CEikonEnv* eikon = CEikonEnv::Static(); |
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366 if( eikon ) |
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367 { |
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368 mode = eikon->ScreenDevice()->DisplayMode(); |
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369 } |
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370 User::LeaveIfError( icon->Bitmap()->Create( aSize, mode ) ); |
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371 |
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372 // create soft mask |
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373 icon->SetMask( new(ELeave) CFbsBitmap() ); |
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374 User::LeaveIfError( icon->Mask()->Create( aSize, EGray256 ) ); |
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375 |
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376 // render svg image |
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377 LeaveIfErrorL( |
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378 svgEngine->RenderDom( handle, icon->Bitmap(), icon->Mask() ) ); |
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379 |
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380 CleanupStack::Pop( icon ); |
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381 CleanupStack::PopAndDestroy( 2, dummy ); // svgEngine |
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382 |
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383 delete iIcon; |
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384 iIcon = icon; |
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385 |
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386 // handle image in RunL |
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387 TRequestStatus* status = &iStatus; |
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388 User::RequestComplete( status, KErrNone ); |
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389 SetActive(); |
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390 } |
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391 |
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392 // --------------------------------------------------------------------------- |
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393 // CAknPrivateImageLoader::LeaveIfErrorL |
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394 // --------------------------------------------------------------------------- |
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395 // |
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396 void CAknPrivateImageLoader::LeaveIfErrorL( MSvgError* aError ) |
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397 { |
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398 if( aError ) |
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399 { |
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400 if( aError->HasError() && !aError->IsWarning() ) |
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401 { |
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402 RDEBUG( "CAknPrivateImageLoader::LeaveIfErrorL: " |
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403 "SVG loading error: %d", aError->ErrorCode() ); |
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404 User::Leave( KErrCorrupt ); |
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405 } |
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406 } |
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407 } |
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408 |
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409 // --------------------------------------------------------------------------- |
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410 // CAknPrivateImageLoader::GenerateMaskLC |
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411 // --------------------------------------------------------------------------- |
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412 // |
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413 CFbsBitmap* CAknPrivateImageLoader::GenerateMaskLC( TSize aSize ) |
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414 { |
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415 CFbsBitmap* mask = new(ELeave) CFbsBitmap; |
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416 CleanupStack::PushL( mask ); |
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417 User::LeaveIfError( mask->Create( aSize, EGray2 ) ); |
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418 |
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419 TInt width = aSize.iWidth; |
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420 TInt height = aSize.iHeight; |
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421 HBufC8* buf = HBufC8::NewLC( mask->ScanLineLength( width, EGray2 ) ); |
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422 TPtr8 bufPtr( buf->Des() ); |
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423 |
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424 for( TInt i = 0; i < height; ++i ) |
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425 { |
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426 mask->GetScanLine( bufPtr, TPoint( 0, i ), width, EGray2 ); |
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427 bufPtr.FillZ(); |
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428 mask->SetScanLine( bufPtr, i ); |
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429 } |
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430 |
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431 CleanupStack::PopAndDestroy( buf ); |
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432 User::LeaveIfError( mask->Compress() ); |
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433 return mask; |
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434 } |
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435 |
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436 // --------------------------------------------------------------------------- |
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437 // CAknPrivateImageLoader::DecodeSize |
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438 // --------------------------------------------------------------------------- |
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439 // |
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440 TSize CAknPrivateImageLoader::DecodeSize( |
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441 const TFrameInfo& aFrameInfo, |
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442 const TSize& aTargetSize ) |
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443 { |
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444 TSize imageSize( aFrameInfo.iOverallSizeInPixels ); |
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445 |
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446 if( aFrameInfo.iFlags & TFrameInfo::EFullyScaleable || |
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447 aTargetSize == imageSize ) |
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448 { |
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449 // decoder can scale to any ratio or the size is already correct |
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450 return aTargetSize; |
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451 } |
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452 |
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453 if( imageSize.iWidth < aTargetSize.iWidth || |
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454 imageSize.iHeight < aTargetSize.iHeight ) |
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455 { |
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456 // image is smaller than targetsize |
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457 return imageSize; |
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458 } |
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459 |
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460 // Scale ratio limits |
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461 const TInt KScaleRatioMin = 2; |
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462 const TInt KScaleRatioMax = 8; |
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463 |
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464 // 1:1 is always valid ratio for decode scaling |
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465 TInt lastValidRatio( 1 ); |
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466 for( TInt ratio = KScaleRatioMin; ratio <= KScaleRatioMax; ratio <<= 1 ) |
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467 { |
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468 if( imageSize.iWidth % ratio + imageSize.iHeight % ratio == 0 ) |
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469 { |
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470 // this ratio is valid |
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471 if( imageSize.iWidth / ratio < aTargetSize.iWidth || |
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472 imageSize.iHeight / ratio < aTargetSize.iHeight ) |
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473 { |
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474 // the decoded size was smaller in some dimension, |
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475 // the last valid ratio should be used |
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476 break; |
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477 } |
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478 |
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479 // this scale ratio results to greater or equal size |
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480 lastValidRatio = ratio; |
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481 } |
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482 } |
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483 |
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484 // return the size scaled with correct ratio |
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485 return TSize( imageSize.iWidth / lastValidRatio, |
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486 imageSize.iHeight / lastValidRatio ); |
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487 } |
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488 |
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489 // End of file |