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1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // This is Image Transform extension for Squeeze Transformation |
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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 @file |
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20 @publishedAll |
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21 @released |
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22 */ |
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23 |
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24 #ifndef __SQUEEZETRANFORMEEXTENSION_H__ |
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25 #define __SQUEEZETRANFORMEEXTENSION_H__ |
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26 |
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27 #include <e32base.h> |
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28 #include <icl/imagetransformpluginext.h> |
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29 #include <imageframeconst.h> |
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30 |
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31 /** |
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32 @publishedAll |
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33 @released |
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34 |
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35 This class provides advanced parameters for squeezing |
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36 */ |
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37 class TAdvancedSqueezeParams |
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38 { |
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39 public: |
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40 /** |
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41 The different behaviours of auto resize |
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42 */ |
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43 enum TAutoResizeAction |
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44 { |
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45 /** |
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46 Preserves the source encoding quality while shrinking the width and height of the image |
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47 */ |
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48 EAutoResizeActionPreserveSourceEncodingQuality, |
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49 /** |
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50 Tries to preserve the max image size while lowering the encoding quality |
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51 */ |
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52 EAutoResizeActionPrioritizeLargeImageSize, |
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53 /** |
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54 Tries to preserve the highest possible encoding quality while shrinking the width and height of the image |
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55 */ |
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56 EAutoResizeActionResizePrioritizeHighEncodingQuality, |
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57 /** |
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58 Simultaneously lower the encoding quality and shrink the width and height of the image |
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59 */ |
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60 EAutoResizeActionMiddleCourse |
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61 }; |
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62 |
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63 IMPORT_C TAdvancedSqueezeParams(); |
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64 |
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65 /** |
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66 The desired max size of the transformed image in bytes. |
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67 */ |
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68 TUint iMaxDestSizeInBytes; |
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69 |
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70 /** |
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71 The transformed image must not be smaller than this. The |
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72 size must be smaller than the iMaxImageSize |
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73 */ |
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74 TSize iMinImageSize; |
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75 |
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76 /** |
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77 The transformed image must not be bigger than this. The size |
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78 must be bigger than the iMinImageSize |
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79 */ |
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80 TSize iMaxImageSize; |
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81 |
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82 /** |
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83 The desired behaviour of the auto resize |
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84 */ |
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85 TInt iResizeAction; |
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86 |
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87 /** |
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88 The lowest desired encoding quality. |
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89 Must be in the range (0.0) to (1.0) |
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90 */ |
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91 TReal32 iMinEncodingQuality; |
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92 |
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93 /** |
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94 The color spacing of the transformed image |
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95 */ |
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96 TUid iSamplingUid; |
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97 private: |
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98 // Future proof |
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99 TAny* iPad1; |
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100 TAny* iPad2; |
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101 TAny* iPad3; |
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102 TAny* iPad4; |
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103 }; |
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104 |
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105 /** |
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106 @publishedAll |
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107 @released |
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108 |
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109 Squeeze Extension to the ImageTransform plugin |
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110 |
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111 The class provides the methods to set the squeeze parameters and is intended to be implemented |
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112 by the plugins supporting the squeezing of the images. The client can set the desired max size |
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113 (in bytes) of the squeezed image and it can also enable auto resizing of the image by setting the |
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114 advanced squeeze parameters. The plugin supporting this extension must use the opaque_data v2 format |
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115 in RSS file and also the squeeze flag must be set in the opaque_data. The client must |
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116 retrieve this extension implementation from the plugin using its extension UID. |
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117 |
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118 In the case where the client's desired size cannot be met the operation will squeeze to the |
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119 smallest file possible and the transform operation will leave with KErrGeneral. The output file |
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120 must be examined by the client to determine its suitability. The client must clean up if the |
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121 output is not acceptable. |
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122 */ |
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123 class CSqueezeTransformExtension : public CImageTransformPluginExtension |
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124 { |
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125 public: |
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126 IMPORT_C void SetDestSizeInBytes(TUint aMaxDestDataSize ) ; |
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127 IMPORT_C void SetAdvancedSqueezeModeL(TAdvancedSqueezeParams* aSqueezeAutoResizeParams ) ; |
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128 |
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129 protected: |
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130 virtual void DoSetDestSizeInBytes(TUint aMaxDestDataSize ) = 0; |
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131 virtual void DoSetAdvancedSqueezeModeL(TAdvancedSqueezeParams* aSqueezeAutoResizeParams ) = 0; |
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132 |
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133 private: |
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134 IMPORT_C virtual void ReservedVirtual5(); |
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135 |
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136 private: |
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137 // Future proofing |
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138 TAny* iPad; |
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139 }; |
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140 |
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141 #endif // __SQUEEZETRANFORMEEXTENSION_H__ |