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1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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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 the "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 * Ixonos Plc |
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14 * |
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15 * Description: |
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16 * |
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17 */ |
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18 |
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19 |
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20 |
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21 #ifndef IMAGEEDITORIMAGEHANDLER_HPP |
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22 #define IMAGEEDITORIMAGEHANDLER_HPP |
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23 |
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24 // INCLUDES |
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25 #include <e32base.h> |
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26 |
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27 // FORWARD DECLARATIONS |
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28 class CImageDecoder; |
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29 class CImageEncoder; |
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30 class CFbsBitmap; |
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31 class MImageHandlerObserver; |
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32 class TRequestStatus; |
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33 class CFileExtensionMIMEType; |
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34 class CFrameImageData; |
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35 |
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36 |
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37 /* CLASS: CImageEditorImageHandler |
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38 * |
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39 * CImageEditorImageHandler represents image handling unit in Image Editor. |
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40 * It includes functionality to asynchronously load and save images. Also, |
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41 * it provides other image managing functionality. |
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42 * |
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43 */ |
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44 class CImageEditorImageHandler : public CBase |
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45 { |
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46 |
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47 public: |
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48 |
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49 /** @name Methods:*/ |
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50 //@{ |
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51 |
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52 enum TImageFormat |
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53 { |
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54 EImageFormatInvalid, |
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55 EImageFormatBmp, |
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56 EImageFormatJpg, |
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57 EImageFormatMbm, |
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58 EImageFormatGif, |
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59 EImageFormatPng, |
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60 EImageFormatTiff, |
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61 EImageFormatMax |
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62 }; |
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63 |
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64 /** @name Methods:*/ |
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65 //@{ |
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66 |
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67 /** NewL factory method, pops cleanupstack |
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68 * |
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69 * @param - |
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70 * @return pointer to created CImageEditorImageHandler object |
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71 */ |
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72 IMPORT_C static CImageEditorImageHandler * NewL (); |
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73 |
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74 /** Destructor |
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75 * |
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76 * @param - |
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77 * @return - |
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78 */ |
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79 IMPORT_C virtual ~CImageEditorImageHandler (); |
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80 |
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81 /** LoadImageAsync |
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82 * |
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83 * Loads image asyncronically. Calls RunL method of an active object |
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84 * when loading complete. |
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85 * |
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86 * @param aFileName - name of the image file to be loaded |
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87 * @param aBitmap - bitmap to which image is loaded, must be created |
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88 * @param aStatus - status indicator |
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89 * and set to wanted size and displaymode |
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90 * @return - |
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91 */ |
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92 IMPORT_C void LoadImageAsyncL ( |
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93 const TDesC & aFileName, |
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94 CFbsBitmap *& aBitmap, |
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95 TRequestStatus * aStatus |
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96 ); |
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97 |
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98 /** ContinueLoading |
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99 * |
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100 * Continues loading of image data, if KErrUnderflow occurs. |
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101 * |
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102 * @param aStatus - request status |
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103 * @return - |
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104 */ |
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105 IMPORT_C void ContinueLoading (TRequestStatus * aStatus); |
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106 |
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107 /** SaveImageAsync |
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108 * |
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109 * Saves image asyncronically. Calls RunL method of an active object |
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110 * when saving complete. |
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111 * |
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112 * @param aFileName - saved image name |
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113 * @param aBitmap - bitmap to be saved |
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114 * @param aImageQuality - JPEG image quality (0,100) |
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115 * @param aStatus - status indicator |
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116 * @return - |
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117 */ |
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118 IMPORT_C void SaveImageAsyncL ( |
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119 const TDesC & aFileName, |
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120 const CFbsBitmap & aBitmap, |
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121 const TInt aImageQuality, |
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122 TRequestStatus * aStatus |
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123 ); |
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124 |
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125 /** GetJpegQualityFactorL |
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126 * |
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127 * Gets the JPEG quality factor. |
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128 * |
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129 * @param aFileName - saved image name |
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130 * @return - the quality factor |
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131 */ |
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132 IMPORT_C TInt GetJpegQualityFactorL (const TDesC & aFileName); |
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133 |
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134 /** RenameImage |
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135 * |
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136 * Renames image. |
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137 * |
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138 * @param aFileNameSrc - source image name |
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139 * @param aFileNameDst - destination image name |
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140 * @return KErrNone if no errors, system wide error code otherwise |
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141 */ |
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142 IMPORT_C TInt RenameImage ( |
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143 const TDesC & aFileNameSrc, |
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144 const TDesC & aFileNameDst |
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145 ) const; |
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146 |
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147 /** DeleteImage |
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148 * |
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149 * Deletes image. |
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150 * |
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151 * @param aFileName - image name to be deleted |
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152 * @return KErrNone if no errors, system wide error code otherwise |
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153 */ |
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154 IMPORT_C TInt DeleteImage (const TDesC & aFileName) const; |
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155 |
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156 /** CleanupConverters |
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157 * |
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158 * Cancels the asynchronous requests and cleans up image converters. |
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159 * |
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160 * @param - |
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161 * @return - |
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162 */ |
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163 IMPORT_C void CleanupConverters (); |
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164 |
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165 /** IsRajpegImageL |
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166 * |
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167 * Checks whether an image is a RAJPEG image or not. |
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168 * |
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169 * @param aFileName - file name |
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170 * @return ETrue if RAJPEG image, EFalse otherwise |
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171 */ |
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172 IMPORT_C TBool IsRajpegImageL (const TDesC & aFileName) const; |
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173 |
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174 /** IsJpegIntact |
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175 * |
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176 * Verifies JPEG image content. |
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177 * |
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178 * @param aFileName - file name |
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179 * @return ETrue if intact, EFalse if broken |
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180 */ |
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181 IMPORT_C TBool IsJpegIntact (const TDesC & aFileName); |
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182 |
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183 //@} |
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184 |
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185 protected: |
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186 |
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187 /** @name Methods:*/ |
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188 //@{ |
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189 |
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190 //@} |
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191 |
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192 /** @name Members:*/ |
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193 //@{ |
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194 |
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195 //@} |
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196 |
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197 private: |
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198 |
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199 /** @name Methods:*/ |
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200 //@{ |
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201 |
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202 /** Default constructor |
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203 * |
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204 * @param - |
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205 * @return - |
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206 */ |
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207 CImageEditorImageHandler (); |
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208 |
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209 /** Second phase constructor, may leave |
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210 * |
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211 * @param - |
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212 * @return - |
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213 */ |
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214 void ConstructL (); |
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215 |
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216 /** GetMIMETypeLC |
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217 * |
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218 * Finds and create CFileExtensionMIMEType type based on file extension. |
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219 * |
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220 * @param aFileName - image file name |
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221 * @return MIME type instance |
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222 */ |
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223 CFileExtensionMIMEType * GetMIMETypeL (const TDesC & aFileName); |
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224 |
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225 /* GetFrameImageDataL |
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226 * |
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227 * Gets CFrameImageData instance. |
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228 * |
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229 * @param aExt - image name extension |
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230 * @param aQuality - JPEG quality |
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231 * @return CFrameImageData instance |
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232 */ |
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233 CFrameImageData * GetFrameImageDataL ( |
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234 const TDesC & aExt, |
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235 const TInt aQuality |
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236 ) const; |
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237 |
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238 /** Copy constructor, disabled |
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239 */ |
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240 CImageEditorImageHandler (const CImageEditorImageHandler & rhs); |
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241 |
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242 /** Assignment operator, disabled |
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243 */ |
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244 CImageEditorImageHandler & operator= (const CImageEditorImageHandler & rhs); |
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245 |
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246 //@} |
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247 |
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248 /** @name Members:*/ |
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249 //@{ |
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250 /// Image decoder instance (used in loading) |
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251 CImageDecoder * iImageDecoder; |
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252 |
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253 /// Image encoder instance (used in saving) |
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254 CImageEncoder * iImageEncoder; |
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255 //@} |
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256 |
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257 }; |
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258 |
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259 |
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260 #endif |
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261 |
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262 // End of File |