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1 // Copyright (c) 2006-2009 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 module implements the functions that create the screen class depending |
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15 // on the screen type. |
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16 // Include files |
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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 @file |
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22 */ |
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23 /********************************************************************/ |
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24 #include "BITDRAW.H" |
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25 #include <hal.h> |
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26 #include "ScreenInfo.h" |
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27 #include "scdraw.h" |
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28 #include "scdraw.inl" |
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29 #include <graphics/gdi/gdiconsts.h> |
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30 |
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31 |
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32 /** |
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33 Creates an instance of CFbsDrawDevice class. |
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34 @param aScreenNo Screen number |
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35 @param aDispMode Display mode |
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36 @param aScreenInfo Screen parameters: video memory address and screen size |
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37 @return A pointer to the created CFbsDrawDevice object |
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38 @leave System-wide error code including KErrNoMemory |
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39 @internalComponent |
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40 */ |
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41 static CFbsDrawDevice* CreateInstanceL(TInt aScreenNo, |
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42 TDisplayMode aDispMode, |
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43 const TScreenInfo& aScreenInfo) |
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44 { |
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45 CFbsDrawDevice* drawDevice = NULL; |
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46 |
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47 TInt modeCount; |
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48 TInt matchedMode=-1; |
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49 //there is some "ambiguity" about 24 and 32 bit modes... |
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50 //They are both byte per color component, and both actually have 32 bits per pixel memory use. |
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51 //This ambiguity does not exist between 12 and 16 bit modes, |
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52 //because they are distinct color component patterns (x444, 565) |
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53 //but for now 24 and 32 bit modes are considered equivalent here. |
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54 |
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55 if (HAL::Get(aScreenNo, HALData::EDisplayNumModes,modeCount)== KErrNone && modeCount>=1) |
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56 { //If multiple modes are supported then the highest bpp must be found |
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57 |
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58 TInt reqBpp= TDisplayModeUtils::NumDisplayModeBitsPerPixel(aDispMode); |
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59 TInt reqBpp2=reqBpp; |
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60 if ( reqBpp==24 || reqBpp==32 ) //Best to be specific here. Who knows how likely is 30 or 64 bpp support? |
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61 { |
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62 reqBpp2=32+24 - reqBpp; //reflect 24<==>32 |
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63 //Important compile-time decision embedded here: Only one 32-bit mode is supported |
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64 if(CFbsDrawDevice::DisplayMode16M() != aDispMode) |
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65 { |
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66 User::Leave(KErrNotSupported); |
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67 } |
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68 } |
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69 for (TInt mode=0; mode<modeCount; mode++) |
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70 { |
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71 TInt modeBpp=mode; |
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72 if(HAL::Get(aScreenNo, HALData::EDisplayBitsPerPixel, modeBpp) == KErrNone) |
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73 { |
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74 if (modeBpp==reqBpp || modeBpp==reqBpp2) |
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75 { |
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76 matchedMode=mode; |
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77 break; |
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78 } |
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79 } |
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80 } |
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81 } |
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82 if (matchedMode==-1) |
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83 { //This is the expected error code |
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84 User::Leave(KErrNotSupported); |
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85 } |
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86 //Switch the display mode, call the constructor of the class defined |
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87 switch(aDispMode) |
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88 { |
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89 /** Monochrome display mode (1 bpp) */ |
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90 case EGray2: |
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91 { |
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92 CDrawOneBppScreenBitmap* drawDeviceX = new (ELeave) CDrawOneBppScreenBitmap; |
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93 drawDevice=drawDeviceX; |
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94 CleanupStack::PushL(drawDevice) ; |
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95 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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96 aScreenNo, |
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97 aScreenInfo.iAddress, |
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98 aScreenInfo.iSize,matchedMode)); |
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99 } |
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100 break; |
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101 /** Four grayscales display mode (2 bpp) */ |
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102 case EGray4: |
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103 { |
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104 CDrawTwoBppScreenBitmap* drawDeviceX = new (ELeave) CDrawTwoBppScreenBitmap; |
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105 drawDevice=drawDeviceX; |
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106 CleanupStack::PushL(drawDevice) ; |
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107 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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108 aScreenNo, |
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109 aScreenInfo.iAddress, |
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110 aScreenInfo.iSize,matchedMode)); |
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111 } |
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112 break; |
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113 /** 16 grayscales display mode (4 bpp) */ |
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114 case EGray16: |
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115 { |
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116 CDrawFourBppScreenBitmapGray* drawDeviceX = new (ELeave) CDrawFourBppScreenBitmapGray; |
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117 drawDevice=drawDeviceX; |
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118 CleanupStack::PushL(drawDevice) ; |
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119 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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120 aScreenNo, |
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121 aScreenInfo.iAddress, |
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122 aScreenInfo.iSize,matchedMode)); |
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123 } |
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124 break; |
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125 /** 256 grayscales display mode (8 bpp) */ |
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126 case EGray256: |
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127 { |
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128 CDrawEightBppScreenBitmapGray* drawDeviceX = new (ELeave) CDrawEightBppScreenBitmapGray; |
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129 drawDevice=drawDeviceX; |
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130 CleanupStack::PushL(drawDevice) ; |
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131 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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132 aScreenNo, |
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133 aScreenInfo.iAddress, |
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134 aScreenInfo.iSize,matchedMode)); |
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135 } |
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136 break; |
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137 /** Low colour EGA 16 colour display mode (4 bpp) */ |
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138 case EColor16: |
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139 { |
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140 CDrawFourBppScreenBitmapColor* drawDeviceX = new (ELeave) CDrawFourBppScreenBitmapColor; |
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141 drawDevice=drawDeviceX; |
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142 CleanupStack::PushL(drawDevice) ; |
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143 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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144 aScreenNo, |
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145 aScreenInfo.iAddress, |
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146 aScreenInfo.iSize,matchedMode)); |
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147 } |
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148 break; |
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149 /** 256 colour display mode (8 bpp) */ |
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150 case EColor256: |
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151 { |
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152 CDrawEightBppScreenBitmapColor* drawDeviceX = new (ELeave) CDrawEightBppScreenBitmapColor; |
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153 drawDevice=drawDeviceX; |
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154 CleanupStack::PushL(drawDevice) ; |
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155 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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156 aScreenNo, |
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157 aScreenInfo.iAddress, |
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158 aScreenInfo.iSize,matchedMode)); |
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159 } |
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160 break; |
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161 /** 4,000 colour display mode (16 bpp) */ |
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162 case EColor4K: // 12 Bpp color mode |
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163 { |
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164 CDrawTwelveBppScreenBitmapColor* drawDeviceX = new (ELeave) CDrawTwelveBppScreenBitmapColor; |
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165 drawDevice=drawDeviceX; |
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166 CleanupStack::PushL(drawDevice) ; |
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167 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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168 aScreenNo, |
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169 aScreenInfo.iAddress, |
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170 aScreenInfo.iSize,matchedMode)); |
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171 } |
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172 break; |
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173 |
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174 case EColor64K: // 16 Bpp color mode |
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175 { |
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176 CDrawSixteenBppScreenBitmap* drawDeviceX = new (ELeave) CDrawSixteenBppScreenBitmap; |
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177 drawDevice=drawDeviceX; |
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178 CleanupStack::PushL(drawDevice) ; |
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179 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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180 aScreenNo, |
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181 aScreenInfo.iAddress, |
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182 aScreenInfo.iSize,matchedMode)); |
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183 } |
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184 break; |
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185 case EColor16MU: |
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186 { |
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187 CDrawUTwentyFourBppScreenBitmap* drawDeviceX = new (ELeave) CDrawUTwentyFourBppScreenBitmap; |
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188 drawDevice=drawDeviceX; |
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189 CleanupStack::PushL(drawDevice) ; |
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190 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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191 aScreenNo, |
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192 aScreenInfo.iAddress, |
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193 aScreenInfo.iSize,matchedMode)); |
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194 } |
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195 break; |
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196 case EColor16MA: |
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197 { |
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198 CDrawThirtyTwoBppScreenBitmapAlpha* drawDeviceX = new (ELeave) CDrawThirtyTwoBppScreenBitmapAlpha; |
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199 drawDevice=drawDeviceX; |
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200 CleanupStack::PushL(drawDevice) ; |
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201 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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202 aScreenNo, |
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203 aScreenInfo.iAddress, |
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204 aScreenInfo.iSize,matchedMode)); |
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205 } |
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206 break; |
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207 case EColor16MAP: |
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208 { |
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209 CDrawThirtyTwoBppScreenBitmapAlphaPM* drawDeviceX = new (ELeave) CDrawThirtyTwoBppScreenBitmapAlphaPM; |
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210 drawDevice=drawDeviceX; |
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211 CleanupStack::PushL(drawDevice) ; |
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212 User::LeaveIfError(drawDeviceX->ConstructScreen( |
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213 aScreenNo, |
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214 aScreenInfo.iAddress, |
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215 aScreenInfo.iSize,matchedMode)); |
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216 } |
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217 break; |
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218 default: |
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219 User::Leave(KErrNotSupported); |
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220 } |
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221 |
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222 CleanupStack::Pop(drawDevice); |
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223 return drawDevice; |
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224 } |
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225 |
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226 |
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227 /********************************************************************/ |
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228 /* Implementation of CFbsDrawDevice class */ |
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229 /********************************************************************/ |
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230 |
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231 /** |
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232 This function calls the correct constructor in function of the display mode. |
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233 @param aInfo, Structure of the LCD info |
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234 @param aDispMode, display mode |
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235 @return A pointer to just created screen device, which implements CFbsDrawDevice interface |
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236 @deprecated Use CFbsDrawDevice::NewScreenDeviceL(TInt aScreenNo, TDisplayMode aDispMode) |
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237 */ |
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238 EXPORT_C CFbsDrawDevice* CFbsDrawDevice::NewScreenDeviceL(TScreenInfoV01 aInfo, TDisplayMode aDispMode) |
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239 { |
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240 __ASSERT_ALWAYS(aInfo.iScreenAddressValid, Panic(EScreenDriverPanicInvalidWindowHandle)); |
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241 TScreenInfo screenInfo(aInfo.iScreenAddress, aInfo.iScreenSize); |
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242 return ::CreateInstanceL(KDefaultScreenNo, aDispMode, screenInfo); |
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243 } |
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244 |
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245 |
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246 |
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247 /** |
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248 Creates a new screen device instance, which implements CFbsDrawDevice interface. |
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249 The method has to be implemented for each type of supported video hardware. |
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250 @param aScreenNo Screen number |
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251 @param aDispMode Requested display mode |
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252 @return A pointer to just created screen device, which implements CFbsDrawDevice interface |
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253 @leave KErrNoMemory Not enough memory |
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254 KErrNotSupported The requested screen device type is not supported |
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255 */ |
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256 EXPORT_C CFbsDrawDevice* CFbsDrawDevice::NewScreenDeviceL(TInt aScreenNo, |
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257 TDisplayMode aDispMode) |
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258 { |
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259 TInt width = 0, height = 0; |
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260 User::LeaveIfError(HAL::Get(aScreenNo, HALData::EDisplayXPixels, width)); |
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261 User::LeaveIfError(HAL::Get(aScreenNo, HALData::EDisplayYPixels, height)); |
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262 __ASSERT_ALWAYS(width > 0 && height > 0, Panic(EScreenDriverPanicInvalidHalValue)); |
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263 |
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264 TUint8* address = 0; |
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265 |
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266 TScreenInfo screenInfo(address, TSize(width, height)); |
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267 return ::CreateInstanceL(aScreenNo, aDispMode, screenInfo); |
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268 } |
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269 |
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270 /** |
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271 Depending on the current graphics hardware this |
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272 will return one of the 16M video modes defined in |
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273 TDisplayMode, or ENone if a 16M video mode is not supported. |
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274 The method has to be implemented on all hardware platforms. |
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275 @return a 16M display mode or ENone. |
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276 ENone - it means that current hardware doesn't have 16M color mode. |
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277 */ |
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278 EXPORT_C TDisplayMode CFbsDrawDevice::DisplayMode16M() |
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279 { |
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280 return EColor16MAP; |
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281 } |
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282 |
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283 |
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284 /** |
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285 Complete construction of the helper object. |
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286 @param aScreenNo The screen number, starting from 0. |
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287 @param aPixelFormat Pixel format UID or 0 for default based on bpp |
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288 @return KErrNone or a system wide error value. |
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289 */ |
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290 TInt CScreenDeviceHelper::Construct(TInt aScreenNo, TUidPixelFormat aPixelFormat, TUint aHalMode) |
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291 { |
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292 iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EScreenField] = aScreenNo; // Screen number |
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293 iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField] = aHalMode; // Rotation and hal mode index |
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294 iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::ETypeGuidField] = aPixelFormat; //May be zero for non-GCE modes |
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295 iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::ETypeClassField] |
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296 = ((TUint32)(TSurfaceId::EScreenSurface) << TSurfaceId::TScreenSurfaceUsage::ETypeClassShift); // Type |
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297 iAssignedOrientation = EDeviceOrientationNormal; // Actual rotation is held seperately from surface ID |
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298 |
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299 TInt val = 0; |
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300 iHasChunk = EFalse; |
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301 TInt ret = HAL::Get(aScreenNo,HALData::EDisplayMemoryHandle,val); |
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302 if (ret == KErrNone) |
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303 { |
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304 __ASSERT_DEBUG(val != 0, Panic(EScreenDriverPanicInvalidHalValue)); |
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305 RChunk chunk; |
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306 ret = chunk.SetReturnedHandle(val); |
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307 if (ret != KErrNone) |
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308 { |
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309 return ret; |
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310 } |
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311 iChunk = chunk; |
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312 ret = iChunk.Duplicate(RThread(), EOwnerProcess); |
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313 // Close before checking for errors, as we don't want to leave the |
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314 // temporary chunk handle floating about. |
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315 chunk.Close(); |
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316 if (ret != KErrNone) |
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317 { |
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318 return ret; |
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319 } |
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320 iHasChunk = ETrue; |
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321 } |
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322 // KErrNotSupported is returned if we can't get the Handle because it's not a driver |
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323 // that supports the concept. We don't return that error, since it's perfectly valid |
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324 // to not support this. |
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325 else if (ret != KErrNotSupported) |
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326 { |
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327 return ret; |
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328 } |
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329 return iSurfaceUpdateSession.Connect(); |
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330 } |
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331 |
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332 CScreenDeviceHelper::~CScreenDeviceHelper() |
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333 { |
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334 |
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335 iSurfaceUpdateSession.Close(); |
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336 iChunk.Close(); |
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337 } |
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338 |
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339 void CScreenDeviceHelper::NotifyWhenAvailable(TRequestStatus& aStatus) |
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340 { |
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341 iSurfaceUpdateSession.NotifyWhenAvailable(aStatus); |
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342 } |
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343 |
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344 /** |
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345 Implementation of corresponding function in CDrawDevice, utilizing a tracked |
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346 update region. Updates the screen from the surface, if the update region is |
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347 not empty. |
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348 */ |
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349 void CScreenDeviceHelper::Update() |
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350 { |
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351 if (iUpdateRegion.IsEmpty()) |
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352 return; |
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353 |
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354 iSurfaceUpdateSession.SubmitUpdate(ScreenNumber(), iSurface, 0, &iUpdateRegion); |
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355 iUpdateRegion.Clear(); |
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356 } |
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357 |
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358 /** |
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359 Implementation of corresponding function in CDrawDevice, utilizing a tracked |
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360 update region. Adds the given region to the update region and updates the |
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361 screen. |
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362 @param aRegion Additional region to be updated. |
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363 */ |
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364 void CScreenDeviceHelper::Update(const TRegion& aRegion) |
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365 { |
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366 if(!aRegion.IsEmpty() && !aRegion.CheckError()) |
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367 { |
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368 TInt rcCnt = aRegion.Count(); |
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369 for (TInt ii=0; ii < rcCnt; ++ii) |
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370 { |
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371 UpdateRegion(aRegion[ii]); |
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372 } |
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373 } |
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374 Update(); |
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375 } |
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376 |
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377 /** |
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378 Implementation of corresponding function in CDrawDevice, utilizing a tracked |
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379 update region. Adds the given rectangle to the update region. |
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380 @param aRect Rectangle to be added to the update region. |
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381 */ |
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382 void CScreenDeviceHelper::UpdateRegion(const TRect& aRect) |
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383 { |
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384 if (aRect.IsEmpty()) |
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385 { |
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386 // Adding an empty rectangle should have no effect. |
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387 return; |
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388 } |
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389 |
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390 if (iUpdateRegion.CheckError()) |
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391 { |
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392 // Try to ensure the region doesn't keep an error forever. |
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393 iUpdateRegion.Clear(); |
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394 } |
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395 |
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396 TRect bounds(iUpdateRegion.BoundingRect()); |
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397 iUpdateRegion.AddRect(aRect); |
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398 |
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399 // If the region fills up, start again with the old bounding box plus this |
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400 // rectangle. |
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401 if (iUpdateRegion.CheckError()) |
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402 { |
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403 iUpdateRegion.Clear(); |
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404 iUpdateRegion.AddRect(bounds); |
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405 iUpdateRegion.AddRect(aRect); |
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406 } |
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407 } |
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408 |
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409 /** |
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410 Reset the update region to be empty without submitting any outstanding updates. |
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411 */ |
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412 void CScreenDeviceHelper::ResetUpdateRegion() |
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413 { |
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414 iUpdateRegion.Clear(); |
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415 } |
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416 |
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417 /** |
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418 This function returns the current surface in use for this screen. |
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419 @param aSurface The identifier to be updated with the current screen surface. |
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420 */ |
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421 void CScreenDeviceHelper::GetSurface(TSurfaceId& aSid) const |
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422 { |
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423 aSid = iSurface; |
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424 } |
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425 |
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426 /** |
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427 This function is used to request the device orientations supported by the |
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428 screen device. |
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429 @return A bitwise combination of one or more TDeviceOrientation enumerated |
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430 values indicating the device orientations that are supported by this device. |
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431 */ |
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432 TUint CScreenDeviceHelper::DeviceOrientationsAvailable(const TSize& aScreenSize) const |
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433 { |
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434 //All that can be reported here is what the CScreenDevice can support via HAL |
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435 //With generic driver, the runtime can be further restricted by the GCE |
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436 if ( aScreenSize.iWidth && aScreenSize.iWidth==aScreenSize.iHeight ) |
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437 { |
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438 return EDeviceOrientationNormal | EDeviceOrientation90CW | |
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439 EDeviceOrientation180 | EDeviceOrientation270CW; |
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440 } |
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441 //Query base HAL for rotated view support |
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442 TInt offset1=iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]|TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag; |
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443 if ( HAL::Get(ScreenNumber(), HALData::EDisplayOffsetBetweenLines, offset1)==KErrNone |
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444 && offset1!=0) |
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445 { |
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446 return EDeviceOrientationNormal | EDeviceOrientation90CW | |
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447 EDeviceOrientation180 | EDeviceOrientation270CW; |
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448 } |
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449 else |
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450 return EDeviceOrientationNormal | EDeviceOrientation180; |
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451 } |
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452 |
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453 /** |
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454 This function selects the surface and device buffer to use in the screen |
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455 driver for this screen. Normal and 180° rotations will generally use the same |
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456 surface, while 90° and 270° will use another. The surfaces may have different |
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457 width, height, stride and surface ID, so functions that make use of any of |
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458 these may be affected after a change in surface orientation, and the return |
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459 value should be checked for this reason. |
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460 |
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461 This call does not change the way rendering is performed, but may operate on |
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462 the underlying memory using a new shape. The call does not change the display |
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463 controller's settings, as this is handled via the GCE. All this changes are the |
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464 internal attributes of the screen device and driver objects. A CFbsBitGc object |
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465 activated on the device should be reactivated, to update its own attributes, or |
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466 drawing may be corrupted. |
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467 |
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468 Note: while TDeviceOrientation values do not directly correspond to |
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469 CFbsBitGc::TGraphicsOrientation values, and cannot be used interchangeably, it |
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470 is simple to generate the former from the latter using the left-shift operator |
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471 (i.e. device == (1 << graphics)). In particular a device orientation of |
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472 90 degrees clockwise is equivalent to a content orientation of 90 degrees anti- |
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473 clockwise, which is what TGraphicsOrientation refers to for the equivalent |
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474 setting. The letters "CW" in the TDeviceOrientation enumeration refer |
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475 to a clockwise device rotation, so EDeviceOrientation90CW is a 90 degree |
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476 clockwise rotation of the device. |
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477 |
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478 @param aOrientation The new device orientation, relative to the normal physical |
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479 screen orientation. |
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480 @param aNewSize The new pixel dimensions of the surface to be used. |
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481 @return ETrue is returned if any of the surface, width, height or stride |
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482 attributes of the screen device have changed as a result of the call or EFalse |
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483 if none of the attributes have changed. |
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484 */ |
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485 TBool CScreenDeviceHelper::SetDeviceOrientation(TDeviceOrientation aOrientation, TSize& aNewSize) |
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486 { |
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487 // Check only one orientation bit is set |
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488 if (((TInt)aOrientation - 1) & aOrientation) |
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489 { |
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490 Panic(EScreenDriverPanicInvalidParameter); |
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491 } |
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492 |
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493 // Check the orientation is supported |
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494 if ((DeviceOrientationsAvailable(aNewSize) & aOrientation) == 0) |
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495 { |
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496 Panic(EScreenDriverPanicInvalidParameter); |
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497 } |
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498 |
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499 iAssignedOrientation=aOrientation; |
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500 |
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501 return SetDeviceFlipMode(ConvertFlip(aOrientation),aNewSize); |
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502 } |
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503 /** Sets or clears the flipped flag indicating that the width and height have been swapped for a +/-90 deg rotation |
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504 * Rotation is not required for square displays unless the Hal wants one. |
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505 **/ |
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506 TBool CScreenDeviceHelper::SetDeviceFlipMode(TBool aFlip, TSize& aNewSize) |
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507 { |
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508 //This is now a private method that doesn't validate aFlip |
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509 TInt newFlipMode= iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]; |
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510 if (aFlip) |
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511 { |
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512 newFlipMode|=TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag; |
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513 } |
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514 else |
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515 { |
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516 newFlipMode&=~TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag; |
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517 } |
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518 if (newFlipMode == iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]) |
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519 { |
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520 // No change to mode requested. |
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521 return EFalse; |
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522 } |
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523 TInt err=0; |
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524 err|=HAL::Get(ScreenNumber(), HALData::EDisplayXPixels, aNewSize.iWidth); |
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525 err|=HAL::Get(ScreenNumber(), HALData::EDisplayYPixels, aNewSize.iHeight); |
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526 __ASSERT_ALWAYS(err==KErrNone,Panic(EScreenDriverPanicInvalidHalValue)); |
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527 if (aNewSize.iWidth==aNewSize.iHeight) |
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528 { //Attempt optimisation to not flip if the screen is square, so avoid recomposition. |
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529 TInt stride1=iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]; |
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530 TInt stride2=stride1^TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag; |
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531 TInt offset1=stride1; |
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532 TInt offset2=stride2; |
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533 //Does the rotated mode have any other attributes that differ? |
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534 //It is just about possible to imagine that the rotated display |
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535 //wants to use a different setting for the flipped legacy buffer for optimisation purposes. |
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536 err|=HAL::Get(ScreenNumber(), HALData::EDisplayOffsetToFirstPixel, offset1); |
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537 err|=HAL::Get(ScreenNumber(), HALData::EDisplayOffsetBetweenLines, stride1); |
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538 //The existing mode settings should not fail... we are already in this mode! |
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539 __ASSERT_ALWAYS(err==KErrNone,Panic(EScreenDriverPanicInvalidHalValue)); |
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540 |
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541 TInt rotatedErr = HAL::Get(ScreenNumber(), HALData::EDisplayOffsetToFirstPixel, offset2); |
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542 rotatedErr |= HAL::Get(ScreenNumber(), HALData::EDisplayOffsetBetweenLines, stride2); |
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543 //The HAL may indicate rotation is not required by failing to return data or returning the same data |
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544 if ( rotatedErr!=KErrNone || stride2==0 ) //Offset can legitimately be zero. |
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545 { |
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546 // No change to mode supported. |
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547 return EFalse; |
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548 } |
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549 if ( stride1==stride2 && offset1==offset2 ) |
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550 { |
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551 // No change to mode needed. |
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552 return EFalse; |
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553 } |
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554 } |
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555 |
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556 iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField] = newFlipMode; |
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557 if (aFlip) |
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558 { |
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559 // Swap width and height in the alternate orientation. |
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560 aNewSize.SetSize(aNewSize.iHeight, aNewSize.iWidth); |
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561 } |
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562 return ETrue; |
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563 } |
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564 /** Returns the stride for the given mode. |
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565 * This method must not panic if it should fail! |
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566 **/ |
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567 TUint CScreenDeviceHelper::BytesPerScanline() const |
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568 { |
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569 TInt linepitchInBytes = iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]; |
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570 TInt ret = HAL::Get(ScreenNumber(),HALData::EDisplayOffsetBetweenLines,linepitchInBytes); |
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571 if (ret!=KErrNone) |
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572 { |
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573 return 0; |
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574 } |
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575 return linepitchInBytes ; |
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576 } |
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577 /** Returns the address for the image data |
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578 * This method must not panic if it should fail! |
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579 **/ |
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580 void* CScreenDeviceHelper::AddressFirstPixel() const |
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581 { |
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582 TInt bufferStartAddress = iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]; |
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583 TInt ret = KErrNone; |
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584 if (iHasChunk) |
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585 { |
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586 // The "chunk" way to do this is to get the handle of the chunk, and then the base address of the |
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587 // chunk itself. |
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588 bufferStartAddress = (TInt)iChunk.Base(); |
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589 } |
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590 else |
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591 { |
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592 // Chunk not supported, use older HAL call to get the buffer address. |
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593 ret = HAL::Get(ScreenNumber(),HALData::EDisplayMemoryAddress,bufferStartAddress); |
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594 if (ret!=KErrNone) |
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595 { |
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596 return 0; |
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597 } |
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598 } |
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599 TInt bufferOffsetFirstPixel = iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]; |
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600 ret = HAL::Get(ScreenNumber(),HALData::EDisplayOffsetToFirstPixel,bufferOffsetFirstPixel); |
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601 if (ret!=KErrNone) |
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602 { |
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603 return 0; |
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604 } |
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605 return (void*)(bufferStartAddress+bufferOffsetFirstPixel); |
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606 } |
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607 |
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608 /** |
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609 Returns the current device width/height flip state of this surface, representing a +/-90 deg rotation. |
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610 **/ |
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611 TBool CScreenDeviceHelper::DeviceFlipped() const |
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612 { |
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613 return (iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField] & TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag) != 0; //!=0 forces true --> 1 |
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614 } |
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615 |
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616 |
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617 /** |
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618 Returns the current device orientation. |
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619 */ |
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620 TDeviceOrientation CScreenDeviceHelper::DeviceOrientation() const |
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621 { |
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622 return iAssignedOrientation; |
|
623 } |
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624 /** Returns an accurate scaling factor between twips and pixels in width. |
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625 |
|
626 **/ |
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627 TInt CScreenDeviceHelper::HorzTwipsPerThousandPixels(const TSize& aPixels)const |
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628 { |
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629 __ASSERT_DEBUG(aPixels.iWidth, Panic(EScreenDriverPanicInvalidSize)); |
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630 |
|
631 TInt width = 0; |
|
632 TInt r = HAL::Get(ScreenNumber(), SecondIfFlipped(HAL::EDisplayXTwips,HAL::EDisplayYTwips), width); |
|
633 __ASSERT_DEBUG(r==KErrNone && width!=0, Panic(EScreenDriverPanicInvalidHalValue)); |
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634 |
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635 return (width * 1000) / aPixels.iWidth; |
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636 } |
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637 /** Returns an accurate scaling factor between twips and pixels in height. |
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638 **/ |
|
639 TInt CScreenDeviceHelper::VertTwipsPerThousandPixels(const TSize& aPixels)const |
|
640 { |
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641 __ASSERT_DEBUG(aPixels.iHeight, Panic(EScreenDriverPanicInvalidSize)); |
|
642 |
|
643 TInt height = 0; |
|
644 TInt r = HAL::Get(ScreenNumber(), SecondIfFlipped(HAL::EDisplayYTwips,HAL::EDisplayXTwips), height); |
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645 __ASSERT_DEBUG(r==KErrNone && height!=0, Panic(EScreenDriverPanicInvalidHalValue)); |
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646 |
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647 return (height * 1000) / aPixels.iHeight; |
|
648 } |
|
649 |
|
650 |