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1 // Copyright (c) 1999-2009 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 // |
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15 |
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16 #include <icl/imageprocessor.h> |
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17 |
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18 // |
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19 // this file contains many performance-critical code, so use ARM instruction set for it |
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20 // |
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21 #ifdef __ARMCC__ |
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22 #pragma arm |
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23 #pragma O3 |
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24 #pragma Otime |
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25 #endif |
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26 |
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27 /** |
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28 @internalComponent |
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29 */ |
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30 GLDEF_C void Panic(TImageBitmapUtilPanic aError); |
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31 |
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32 /** |
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33 @internalComponent |
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34 */ |
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35 GLDEF_C TColorConvertor* CreateColorConvertorL(TDisplayMode aDisplayMode); |
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36 |
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37 /** |
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38 Static factory function for creating instances of TColorConvertor derived classes |
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39 based on the supplied display mode. |
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40 |
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41 @param aDisplayMode |
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42 The display mode. This determines the TColorConvertor derived type returned. |
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43 |
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44 @return A pointer to a fully constructed TColorConvertor derived object. |
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45 |
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46 @leave KErrNotSupported |
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47 The display mode is not supported. |
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48 */ |
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49 EXPORT_C TColorConvertor* TColorConvertor::NewL(TDisplayMode aDisplayMode) |
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50 { |
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51 return CreateColorConvertorL(aDisplayMode); |
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52 } |
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53 |
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54 // |
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55 // TImageBitmapUtil |
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56 // |
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57 |
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58 /** |
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59 Default constructor for this class. |
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60 */ |
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61 EXPORT_C TImageBitmapUtil::TImageBitmapUtil(): |
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62 iBitmap(NULL), |
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63 iBpp(0), |
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64 iBppShift(0), |
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65 iPixelShift(0), |
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66 iBitShift(0), |
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67 iScanlineWordLength(0) |
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68 {} |
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69 |
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70 /** |
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71 Requests a lock for the current bitmap from the font & bitmap server and |
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72 sets the current position in the bitmap to the first pixel. |
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73 */ |
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74 EXPORT_C void TImageBitmapUtil::Begin() |
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75 { |
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76 ASSERT(iBitmap && iBitmap->Handle()); |
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77 |
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78 iBase.iWordPos = iBitmap->DataAddress(); |
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79 } |
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80 |
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81 /** |
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82 Requests a lock for the current bitmap from the font & bitmap server and |
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83 sets the current position in the bitmap to aPosition. |
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84 |
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85 @param aPosition |
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86 The position to move to. |
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87 |
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88 @return A boolean indicating if the position was out of bounds. EFalse if the position was out of |
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89 bounds, otherwise ETrue. |
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90 */ |
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91 EXPORT_C TBool TImageBitmapUtil::Begin(const TPoint& aPosition) |
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92 { |
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93 Begin(); |
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94 if (!SetPos(aPosition)) |
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95 { |
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96 End(); |
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97 return EFalse; |
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98 } |
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99 |
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100 return ETrue; |
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101 } |
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102 |
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103 /** |
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104 Releases a lock previously acquired using TImageBitmapUtil::Begin(). |
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105 */ |
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106 EXPORT_C void TImageBitmapUtil::End() |
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107 { |
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108 } |
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109 |
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110 /** |
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111 Sets the current bitmap to aBitmap. |
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112 |
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113 @param aBitmap |
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114 A pointer to the bitmap. |
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115 |
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116 @leave KErrNotFound |
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117 The bitmap or its handle is NULL or its display mode is not recognised. |
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118 */ |
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119 EXPORT_C void TImageBitmapUtil::SetBitmapL(CFbsBitmap* aBitmap) |
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120 { |
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121 if (!aBitmap || !aBitmap->Handle()) |
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122 User::Leave(KErrNotFound); |
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123 |
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124 if(aBitmap->ExtendedBitmapType()!=KNullUid) |
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125 { |
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126 User::Leave(KErrNotSupported); |
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127 } |
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128 |
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129 iBitmap = aBitmap; |
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130 iWordAccess = ETrue; |
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131 |
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132 switch(iBitmap->DisplayMode()) |
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133 { |
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134 case EGray2: |
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135 iBppShift = 0; |
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136 iMask = 1; |
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137 break; |
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138 case EGray4: |
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139 iBppShift = 1; |
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140 iMask = 3; |
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141 break; |
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142 case EGray16: |
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143 case EColor16: |
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144 iBppShift = 2; |
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145 iMask = 0xF; |
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146 break; |
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147 case EGray256: |
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148 case EColor256: |
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149 iBppShift = 3; |
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150 iMask = 0xFF; |
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151 break; |
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152 case EColor4K: |
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153 case EColor64K: |
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154 iBppShift = 4; |
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155 iMask = 0xFFFF; |
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156 break; |
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157 case EColor16M: |
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158 iWordAccess = EFalse; |
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159 break; |
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160 case EColor16MU: |
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161 iBppShift = 5; |
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162 iMask = 0xFF000000; // | with pixel value to set alpha channel to opaque |
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163 break; |
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164 case EColor16MA: |
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165 iBppShift = 5; |
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166 iMask = 0x00000000; // | with pixel value to set alpha channel level |
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167 break; |
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168 default: |
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169 User::Leave(KErrNotFound); |
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170 break; |
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171 } |
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172 |
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173 iBpp = 1<<iBppShift; |
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174 iPixelsPerWord = 32>>iBppShift; |
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175 iPixelShift = 5-iBppShift; |
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176 |
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177 iSize = iBitmap->SizeInPixels(); |
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178 iScanlineWordLength = CFbsBitmap::ScanLineLength(iSize.iWidth,iBitmap->DisplayMode()) / 4; |
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179 } |
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180 |
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181 /** |
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182 Sets the pixel value at the current bitmap position using aPixelIndex. |
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183 |
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184 @post |
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185 The current position is updated. |
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186 |
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187 @param aPixelIndex |
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188 The pixel index. |
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189 */ |
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190 EXPORT_C void TImageBitmapUtil::SetPixel(TUint32 aPixelIndex) |
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191 { |
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192 ASSERT(iPosition.iX < iSize.iWidth); |
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193 |
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194 iPosition.iX++; |
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195 |
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196 if (iWordAccess) |
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197 { |
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198 TUint32* dataPtr = iData.iWordPos; |
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199 switch(iBppShift) |
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200 { |
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201 case 5: |
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202 *dataPtr = aPixelIndex|iMask; |
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203 break; |
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204 default: |
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205 TInt bitShift = iBitShift; |
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206 |
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207 *dataPtr &= ~(iMask << bitShift); |
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208 *dataPtr |= aPixelIndex << bitShift; |
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209 |
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210 bitShift += iBpp; |
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211 if (bitShift >= 32) |
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212 { |
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213 bitShift = 0; |
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214 iData.iWordPos = dataPtr+1; |
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215 } |
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216 iBitShift = bitShift; |
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217 break; |
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218 } |
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219 } |
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220 else |
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221 { |
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222 TUint8* dataPtr = iData.iBytePos; |
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223 |
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224 *dataPtr++ = TUint8(aPixelIndex); |
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225 *dataPtr++ = TUint8(aPixelIndex >> 8); |
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226 *dataPtr++ = TUint8(aPixelIndex >> 16); |
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227 |
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228 iData.iBytePos = dataPtr; |
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229 } |
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230 |
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231 } |
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232 |
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233 /** |
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234 Sets an array of pixel values, starting at the current bitmap position using the |
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235 values supplied in aPixelIndex. |
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236 |
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237 @post |
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238 The current position is updated. |
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239 |
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240 @param aPixelIndex |
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241 A pointer to the first element in the array. |
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242 @param aNumberOfPixels |
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243 The number of elements in the array. |
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244 */ |
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245 EXPORT_C void TImageBitmapUtil::SetPixels(TUint32* aPixelIndex,TInt aNumberOfPixels) |
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246 { |
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247 TInt newXPos = iPosition.iX + aNumberOfPixels; |
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248 ASSERT(newXPos <= iSize.iWidth); |
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249 |
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250 if (newXPos == iSize.iWidth) |
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251 { |
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252 iPosition.iX = 0; |
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253 iPosition.iY++; |
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254 } |
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255 else |
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256 { |
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257 iPosition.iX = newXPos; |
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258 } |
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259 |
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260 if (iWordAccess) |
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261 { |
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262 TUint32* dataPtr = iData.iWordPos; |
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263 TInt bitShift = iBitShift; |
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264 TInt bpp = iBpp; |
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265 |
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266 // Do pixels in first data word (if first pixel isn't on 32 bit word boundary) |
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267 |
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268 if(bitShift > 0) |
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269 { |
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270 TInt bitShiftLimit = bitShift+(aNumberOfPixels<<iBppShift); |
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271 if(bitShiftLimit>32) |
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272 bitShiftLimit = 32; |
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273 |
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274 TInt numMaskBits = bitShiftLimit-bitShift; |
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275 aNumberOfPixels -= numMaskBits>>iBppShift; |
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276 TInt mask = (1<<numMaskBits)-1; //mask has lowest 'numMaskBits' set |
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277 |
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278 TInt wordValue = *dataPtr; |
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279 |
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280 wordValue &= ~(mask << bitShift); //zero the destination pixels we are about to write |
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281 do { |
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282 wordValue |= *aPixelIndex++ << bitShift; |
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283 bitShift += bpp; |
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284 } |
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285 while(bitShift<bitShiftLimit); |
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286 |
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287 *dataPtr = wordValue; |
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288 |
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289 if(bitShift >= 32) |
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290 { |
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291 bitShift = 0; |
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292 dataPtr++; |
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293 } |
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294 } |
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295 |
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296 // Do pixels which fill whole data words |
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297 |
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298 TUint32* dataPtrLimit = dataPtr+(aNumberOfPixels >> iPixelShift); |
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299 |
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300 aNumberOfPixels &= ~(0xFFFFFFFF<<iPixelShift); |
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301 |
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302 if(dataPtr < dataPtrLimit) |
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303 { |
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304 switch(iBppShift) |
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305 { |
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306 case 5: |
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307 if(iMask == 0xFF000000) |
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308 { |
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309 do { |
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310 *dataPtr++ = *aPixelIndex++|0xFF000000; |
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311 } |
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312 while(dataPtr < dataPtrLimit); |
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313 } |
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314 else |
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315 { |
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316 do { |
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317 *dataPtr++ = *aPixelIndex++; |
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318 } |
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319 while(dataPtr < dataPtrLimit); |
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320 } |
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321 |
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322 break; |
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323 |
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324 case 4: |
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325 do { |
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326 TUint32 wordValue = *aPixelIndex++; |
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327 wordValue |= *aPixelIndex++ << 16; |
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328 *dataPtr++ = wordValue; |
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329 } |
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330 while(dataPtr < dataPtrLimit); |
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331 break; |
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332 |
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333 case 3: |
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334 do { |
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335 TUint32 wordValue = *aPixelIndex++; |
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336 wordValue |= *aPixelIndex++ << 8; |
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337 wordValue |= *aPixelIndex++ << 8*2; |
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338 wordValue |= *aPixelIndex++ << 8*3; |
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339 *dataPtr++ = wordValue; |
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340 } |
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341 while(dataPtr < dataPtrLimit); |
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342 break; |
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343 |
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344 case 2: |
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345 do { |
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346 TUint32 wordValue = *aPixelIndex++; |
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347 wordValue |= *aPixelIndex++ << 4; |
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348 wordValue |= *aPixelIndex++ << 4*2; |
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349 wordValue |= *aPixelIndex++ << 4*3; |
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350 wordValue |= *aPixelIndex++ << 4*4; |
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351 wordValue |= *aPixelIndex++ << 4*5; |
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352 wordValue |= *aPixelIndex++ << 4*6; |
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353 wordValue |= *aPixelIndex++ << 4*7; |
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354 *dataPtr++ = wordValue; |
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355 } |
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356 while(dataPtr < dataPtrLimit); |
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357 break; |
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358 |
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359 case 1: |
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360 do { |
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361 TUint32 wordValue = 0; |
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362 TInt pixelShift = 0; |
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363 do { |
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364 TUint32 eightPixels = *aPixelIndex++; |
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365 eightPixels |= *aPixelIndex++ << 2; |
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366 eightPixels |= *aPixelIndex++ << 2*2; |
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367 eightPixels |= *aPixelIndex++ << 2*3; |
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368 eightPixels |= *aPixelIndex++ << 2*4; |
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369 eightPixels |= *aPixelIndex++ << 2*5; |
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370 eightPixels |= *aPixelIndex++ << 2*6; |
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371 eightPixels |= *aPixelIndex++ << 2*7; |
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372 wordValue |= eightPixels << pixelShift; |
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373 pixelShift += 2*8; |
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374 } |
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375 while(pixelShift < 32); |
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376 *dataPtr++ = wordValue; |
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377 } |
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378 while(dataPtr < dataPtrLimit); |
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379 break; |
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380 |
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381 case 0: |
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382 do { |
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383 TUint32 wordValue = 0; |
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384 TInt pixelShift = 0; |
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385 do { |
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386 TUint32 eightPixels = *aPixelIndex++; |
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387 eightPixels |= *aPixelIndex++ << 1; |
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388 eightPixels |= *aPixelIndex++ << 2; |
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389 eightPixels |= *aPixelIndex++ << 3; |
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390 eightPixels |= *aPixelIndex++ << 4; |
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391 eightPixels |= *aPixelIndex++ << 5; |
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392 eightPixels |= *aPixelIndex++ << 6; |
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393 eightPixels |= *aPixelIndex++ << 7; |
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394 wordValue |= eightPixels << pixelShift; |
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395 pixelShift += 8; |
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396 } |
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397 while(pixelShift < 32); |
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398 *dataPtr++ = wordValue; |
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399 } |
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400 while(dataPtr < dataPtrLimit); |
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401 break; |
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402 default: |
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403 Panic(ECorrupt); |
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404 break; |
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405 } |
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406 } |
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407 |
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408 // Do remaining pixels for colour depths that are < 32bit. |
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409 |
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410 if(aNumberOfPixels) |
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411 { |
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412 TInt bitShiftLimit = aNumberOfPixels<<iBppShift; |
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413 TInt wordValue = *dataPtr; |
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414 |
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415 wordValue &= 0xFFFFFFFF<<bitShiftLimit; //zero the destination pixels we are about to write |
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416 do { |
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417 wordValue |= *aPixelIndex++ << bitShift; |
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418 bitShift += bpp; |
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419 } |
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420 while(bitShift<bitShiftLimit); |
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421 |
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422 *dataPtr = wordValue; |
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423 } |
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424 |
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425 // Finished |
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426 |
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427 iData.iWordPos = dataPtr; |
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428 iBitShift = bitShift; |
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429 } |
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430 else |
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431 { |
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432 TUint32* pixelPtrLimit = aPixelIndex + aNumberOfPixels; |
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433 |
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434 TUint8* dataPtr = iData.iBytePos; |
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435 |
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436 while (aPixelIndex < pixelPtrLimit) |
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437 { |
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438 TUint32 pixel = *aPixelIndex++; |
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439 *dataPtr++ = TUint8(pixel); |
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440 *dataPtr++ = TUint8(pixel >> 8); |
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441 *dataPtr++ = TUint8(pixel >> 16); |
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442 } |
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443 |
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444 iData.iBytePos = dataPtr; |
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445 } |
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446 |
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447 } |
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448 |
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449 /** |
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450 Sets the current position in the bitmap to aPosition. |
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451 |
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452 @param aPosition |
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453 The position to move to. |
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454 |
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455 @return A boolean indicating if the position was out of bounds. EFalse if the position was out of |
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456 bounds, otherwise ETrue. |
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457 */ |
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458 EXPORT_C TBool TImageBitmapUtil::SetPos(const TPoint& aPosition) |
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459 { |
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460 ASSERT(iBitmap); |
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461 ASSERT(iBase.iWordPos); |
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462 |
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463 if (aPosition.iX < 0 || aPosition.iX >= iSize.iWidth || aPosition.iY < 0 || aPosition.iY >= iSize.iHeight) |
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464 return EFalse; |
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465 |
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466 iData.iWordPos = iBase.iWordPos + (iScanlineWordLength * aPosition.iY); |
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467 |
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468 if (iWordAccess) |
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469 { |
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470 iData.iWordPos += aPosition.iX >> iPixelShift; |
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471 iBitShift = (aPosition.iX << iBppShift) & 0x1f; |
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472 } |
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473 else |
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474 iData.iBytePos += (aPosition.iX << 1) + aPosition.iX; |
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475 |
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476 iPosition = aPosition; |
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477 return ETrue; |
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478 } |
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479 |