1 /* |
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2 * Copyright (c) 2002-2007 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: Converts basic icon to CFbsBitmap |
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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 #include <fbs.h> |
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20 #include <gdi.h> |
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21 #include "CSatSBasicIconConverter.h" |
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22 #include "TSatBitOP.h" |
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23 #include "SatLog.h" |
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24 |
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25 // Black&white icon uses 1 bpp. |
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26 const TUint8 KBpp = 1; |
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27 |
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28 // Black&white icon header size is 2. |
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29 const TUint8 KHeaderSize( 2 ); |
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30 |
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31 // Value of icon data, which means that pixel is lit. |
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32 const TInt KPixelIsLit = 1; |
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33 const TUint KBitCount( 8 ); |
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34 |
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35 // ======== MEMBER FUNCTIONS ======== |
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36 |
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37 // ----------------------------------------------------------------------------- |
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38 // CSatSBasicIconConverter::CSatSBasicIconConverter |
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39 // C++ default constructor can NOT contain any code, that |
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40 // might leave. |
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41 // ----------------------------------------------------------------------------- |
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42 // |
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43 CSatSBasicIconConverter::CSatSBasicIconConverter() : |
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44 CSatSIconConverter() |
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45 { |
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46 LOG( SIMPLE, "SATENGINE: \ |
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47 CSatSBasicIconConverter::CSatSBasicIconConverter calling - exiting" ) |
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48 } |
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49 |
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50 // ----------------------------------------------------------------------------- |
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51 // CSatSBasicIconConverter::ConvertL |
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52 // Converts the basic icon format (ETSI TS 131 102 V4.10.0) to CFbsBitmap |
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53 // The format of aData has to be following: |
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54 // 1st byte: Image width |
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55 // 2nd byte: Image height |
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56 // 3rd byte to end: Image body. |
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57 // Image body has to be in following format: |
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58 // Bit 8: 1st pixel |
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59 // Bit 7: 2nd pixel |
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60 // Bit 6: 3rd pixel |
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61 // etc... |
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62 // |
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63 // Clut is not needed for converting basic icon. |
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64 // (other items were commented in a header). |
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65 // ----------------------------------------------------------------------------- |
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66 // |
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67 CFbsBitmap* CSatSBasicIconConverter::ConvertL( |
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68 const TDesC8& aData, |
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69 const TDesC8& /*aClut*/ ) const |
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70 { |
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71 LOG( SIMPLE, "SATENGINE: CSatSBasicIconConverter::ConvertL calling" ) |
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72 |
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73 CheckDataValidityL( aData ); |
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74 const TUint8 width( aData[0] ); |
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75 const TUint8 height( aData[1] ); |
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76 |
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77 // Create black and white bitmap. |
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78 CFbsBitmap* bitmap = CreateBitmapL( width, height, EGray2 ); |
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79 |
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80 // Extract the header information away from icon data. |
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81 const TPtrC8 iconData( |
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82 aData.Mid( KHeaderSize, aData.Length() - KHeaderSize ) ); |
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83 |
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84 TBitmapUtil bitmapUtil( bitmap ); |
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85 bitmapUtil.Begin( TPoint( 0, 0 ) ); |
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86 TInt x( 0 ); |
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87 TInt y( 0 ); |
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88 // Convert the icon data. |
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89 for ( y = 0; y < height; y++ ) |
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90 { |
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91 bitmapUtil.SetPos( TPoint( 0, y ) ); |
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92 for ( x = 0; x < width; x++ ) |
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93 { |
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94 const TInt startingBit( y * width + x ); |
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95 const TUint8 color = |
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96 TSatBitOP::ExtractBits( startingBit, KBpp, iconData ); |
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97 |
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98 if ( KPixelIsLit == color ) |
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99 { |
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100 // Black is lit pixel. |
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101 bitmapUtil.SetPixel( KRgbBlack.Value() ); |
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102 } |
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103 else |
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104 { |
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105 // White means no pixel. |
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106 bitmapUtil.SetPixel( KRgbWhite.Value() ); |
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107 } |
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108 |
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109 bitmapUtil.IncXPos(); |
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110 } |
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111 } |
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112 |
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113 bitmapUtil.End(); |
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114 LOG3( SIMPLE,"SATENGINE: CSatSBasicIconConverter::ConvertL, \ |
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115 x: %d, y: %d", x, y ) |
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116 LOG( SIMPLE, "SATENGINE: CSatSBasicIconConverter::ConvertL exiting" ) |
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117 return bitmap; |
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118 } |
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119 |
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120 // ----------------------------------------------------------------------------- |
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121 // CSatSBasicIconConverter::CheckDataValidityL |
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122 // Checks that icon data has valid length. |
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123 // (other items were commented in a header). |
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124 // ----------------------------------------------------------------------------- |
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125 // |
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126 void CSatSBasicIconConverter::CheckDataValidityL( const TDesC8& aData ) const |
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127 { |
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128 LOG( SIMPLE, |
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129 "SATENGINE: CSatSBasicIconConverter::CheckDataValidityL calling" ) |
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130 |
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131 TInt err( KErrNone ); |
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132 |
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133 // Is there at least width and height in aData. |
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134 const TInt dataLength( aData.Length() ); |
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135 |
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136 if ( dataLength > KHeaderSize ) |
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137 { |
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138 LOG( SIMPLE, "SATENGINE: CSatSBasicIconConverter::CheckDataValidityL \ |
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139 dataLength bigger than KHeaderSize" ) |
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140 const TUint8 width( aData[0] ); |
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141 const TUint8 height( aData[1] ); |
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142 |
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143 // Width and height does not belong to image body. |
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144 const TInt imageBodyLength( dataLength - KHeaderSize ); |
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145 |
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146 // Check that image body has at least as many |
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147 // bits than width and height succest. There might |
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148 // be more bits because the actual size of the image |
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149 // body may occupie only couple bits from |
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150 // last byte in image body. |
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151 const TInt bitsInImageBody( imageBodyLength * KBitCount ); |
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152 const TInt bitsExpectedInImageBody( width * height ); |
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153 |
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154 if ( bitsInImageBody < bitsExpectedInImageBody ) |
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155 { |
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156 LOG( SIMPLE, "SATENGINE: CSatSBasicIconConverter::\ |
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157 CheckDataValidityL bitsInImageBody < bitsExpectedInImageBody" ) |
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158 err = KErrCorrupt; |
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159 } |
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160 } |
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161 else |
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162 { |
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163 LOG( SIMPLE, "SATENGINE: CSatSBasicIconConverter::CheckDataValidityL \ |
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164 dataLength less than KHeaderSize" ) |
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165 err = KErrCorrupt; |
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166 } |
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167 |
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168 User::LeaveIfError( err ); |
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169 LOG( SIMPLE, |
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170 "SATENGINE: CSatSBasicIconConverter::CheckDataValidityL exiting" ) |
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171 } |
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172 |
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173 // End of File |
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