1 /* |
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2 * Copyright (c) 2009 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 : |
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15 * |
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16 */ |
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17 #ifndef TSGRAPHICFILESCALINGHANDLER_H |
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18 #define TSGRAPHICFILESCALINGHANDLER_H |
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19 |
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20 #ifndef __E32SVR_H__ |
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21 #define __E32SVR_H__ |
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22 #endif |
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23 |
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24 |
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25 #ifndef SYMBIAN_ENABLE_PUBLIC_PLATFORM_HEADER_SPLIT |
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26 #define SYMBIAN_ENABLE_PUBLIC_PLATFORM_HEADER_SPLIT |
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27 #endif |
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28 |
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29 #include <bitmaptransforms.h> |
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30 |
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31 class CImageDecoder; |
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32 class CFbsBitmap; |
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33 |
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34 /** |
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35 * Interface to observer contain |
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36 * ImageReadyCallBack function return error code and scaled/resized bitmap. |
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37 */ |
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38 class MImageReadyCallBack |
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39 { |
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40 public: |
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41 virtual void ImageReadyCallBack(TInt error, const CFbsBitmap *bitmap) = 0; |
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42 }; |
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43 |
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44 /** |
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45 * Class to scaling graphic file/s. |
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46 */ |
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47 class CTsGraphicFileScalingHandler : public CActive |
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48 { |
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49 public: |
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50 /** |
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51 * Kind of graphic file scaling. |
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52 * EIgnoreAspectRatio - the file is scaled to size, aspect ratio isn't preserving. |
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53 * EKeepAspectRatio - the file is scaled to a rectangle as large as possible inside size |
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54 * preserving the aspect ratio. |
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55 * EKeepAspectRatioByExpanding - the file is scaled to a rectangle as small as possible outside size |
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56 * preserving the aspect ratio. |
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57 */ |
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58 enum TKindOfScaling |
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59 { |
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60 EIgnoreAspectRatio = 0, |
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61 EKeepAspectRatio = 1, |
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62 EKeepAspectRatioByExpanding = 2, |
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63 }; |
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64 |
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65 private: |
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66 /** |
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67 * Active object current operation. |
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68 */ |
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69 enum TCurrentOperation{ |
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70 ENone = 0, |
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71 EConvertBitmapFromFile = 1, |
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72 EScale = 2 |
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73 }; |
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74 |
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75 public: |
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76 /** |
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77 * Destructor. |
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78 */ |
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79 IMPORT_C ~CTsGraphicFileScalingHandler(); |
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80 |
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81 /** |
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82 * All constructors initialise active object asynchronous operation |
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83 * by calling ConstructL function. |
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84 * 1st group - decoding and scaling. |
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85 * 2nd group - scaling. |
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86 */ |
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87 |
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88 /** |
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89 * 1st group. |
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90 * Exported from dll constructors for activation graphic file scaling. |
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91 * aNotify - reference to observer implementation. |
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92 * aFs - reference to file server session. |
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93 * aFileName - path to graphic file. |
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94 * aMimeType - mime type of graphic file. |
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95 * aNewSize - new size of output graphic file. |
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96 * aKindOfScaling - kind of graphic file scaling described above. |
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97 */ |
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98 IMPORT_C static CTsGraphicFileScalingHandler* NewL(MImageReadyCallBack &aNotify, |
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99 RFs &aFs, |
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100 const TDesC &aFileName, |
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101 const TDesC8& aMimeType, |
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102 const TSize &aNewSize, |
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103 TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio); |
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104 IMPORT_C static CTsGraphicFileScalingHandler* NewLC(MImageReadyCallBack &aNotify, |
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105 RFs &aFs, |
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106 const TDesC &aFileName, |
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107 const TDesC8& aMimeType, |
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108 const TSize &aNewSize, |
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109 TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio); |
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110 |
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111 /** |
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112 * 2nd group. |
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113 * Exported from dll constructors for activation graphic file scaling. |
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114 * aNotify - reference to observer implementation. |
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115 * aImputFbsBitmap - reference to pattern CFbsBitmap. |
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116 * aNewSize - new size of output graphic file. |
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117 * aKindOfScaling - kind of graphic file scaling described above. |
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118 */ |
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119 IMPORT_C static CTsGraphicFileScalingHandler* NewL(MImageReadyCallBack &aNotify, |
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120 const CFbsBitmap &aImputFbsBitmap, |
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121 const TSize &aNewSize, |
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122 TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio); |
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123 IMPORT_C static CTsGraphicFileScalingHandler* NewLC(MImageReadyCallBack &aNotify, |
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124 const CFbsBitmap &aImputFbsBitmap, |
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125 const TSize &aNewSize, |
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126 TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio); |
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127 |
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128 protected: |
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129 /** |
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130 * Cancels the wait for completion of an outstanding request. |
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131 */ |
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132 void DoCancel(); |
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133 /** |
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134 * Handles an active object’s request completion event. |
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135 */ |
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136 void RunL(); |
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137 /** |
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138 * Handles a leave occurring in the request completion event handler RunL(). |
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139 */ |
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140 TInt RunError(TInt); |
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141 |
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142 private: |
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143 /** |
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144 * Functions construct active objest instance and made asynchronous operation/s. |
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145 * Parameters - the same meaning as in appropriate NewL/NewLC functions. |
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146 */ |
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147 void ConstructL(RFs &aFs, const TDesC &aFileName, const TDesC8& aMimeType); |
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148 void ConstructL(const CFbsBitmap &aImputFbsBitmap); |
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149 /** |
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150 * Private constructor. |
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151 * Parameters - the same meaning as in appropriate NewL/NewLC functions. |
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152 */ |
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153 CTsGraphicFileScalingHandler(MImageReadyCallBack &aNotify, |
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154 const TSize &aNewSize, |
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155 TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio); |
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156 /** |
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157 * Action to made before decoding graphic file operation. |
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158 * Parameters - the same meaning as in appropriate NewL/NewLC functions. |
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159 */ |
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160 void DecodingOperationL(RFs &aFs, const TDesC &aFileName, const TDesC8& aMimeType); |
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161 /** |
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162 * Action to made before scaling graphic file operation. |
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163 */ |
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164 void ScalingOperationL(); |
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165 /** |
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166 * Algorithm to determine output bitmap (returned in ImageReadyCallBack) size |
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167 * after scaling operation. |
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168 */ |
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169 TSize NewSizeToScalingOperation(); |
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170 /** |
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171 * Fix for TDisplayMode == EColor16MAP not supported by scaling operation! |
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172 * ! ! ! ADD OTHER NOT SUPPORTED DISPLAY MODES ! ! ! |
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173 */ |
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174 void FixForDisplayModeNotSupportedByScalingOperation(); |
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175 |
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176 private: |
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177 /** |
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178 * Reference to observer implementation - return error code and output bitmap. |
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179 */ |
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180 MImageReadyCallBack &mNotify; |
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181 /** |
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182 * Pointer to decoder used by decoding graphic file algorithm. |
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183 */ |
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184 CImageDecoder *mImageDecoder; |
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185 /** |
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186 * Pointer to input bitmap - before decoding/scaling operation/s. |
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187 */ |
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188 CFbsBitmap *mInputBitmap; |
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189 /** |
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190 * Pointer to output bitmap - returned in mNotify object. |
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191 */ |
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192 CFbsBitmap *mOutputBitmap; |
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193 /** |
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194 * Pointer to CBitmapScaler calss used by scaling graphic file algorithm. |
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195 */ |
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196 CBitmapScaler *mBitmapScaler; |
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197 /** |
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198 * New size of output graphic file. |
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199 */ |
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200 TSize mNewSize; |
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201 /** |
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202 * Kind of graphic file scaling described above. |
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203 */ |
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204 TBool mKindOfScaling; |
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205 /** |
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206 * Active object current operation. |
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207 */ |
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208 TCurrentOperation mCurrentOperation; |
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209 }; |
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210 |
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211 #endif // TSGRAPHICFILESCALINGHANDLER_H |
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