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1 // Copyright (c) 2004-2009 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 /** @file |
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17 @internalTechnology */ |
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18 #include <fbs.h> |
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19 |
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20 #include "PixelConsumer.h" |
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21 |
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22 inline |
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23 void SetRgbPixel(TUint8* ptr,const TUint aR, const TUint aG,const TUint aB) |
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24 { |
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25 *ptr = TUint8(aB); |
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26 ptr[1] = TUint8(aG); |
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27 ptr[2] = TUint8(aR); |
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28 } |
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29 |
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30 inline |
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31 void SetRgbaPixel(TUint8* ptr,const TUint aR, const TUint aG,const TUint aB, const TUint aA) |
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32 { |
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33 *ptr = TUint8(aB); |
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34 ptr[1] = TUint8(aG); |
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35 ptr[2] = TUint8(aR); |
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36 ptr[3] = TUint8(aA); |
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37 } |
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38 |
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39 void CPixelConsumerBase::InitL(const TSize& aFrameSize) |
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40 { |
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41 ASSERT(iFrameBuffer == NULL); |
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42 iFrameSize = aFrameSize; |
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43 iFrameBufferSize = iFrameSize.iHeight*iFrameSize.iWidth*iPixelSize; |
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44 |
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45 iFrameBuffer= new (ELeave) TUint8[ iFrameBufferSize ]; |
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46 |
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47 if(iPixelSize == KRgbaPixelSize) |
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48 { |
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49 TUint32* ptr = reinterpret_cast<TUint32*>(iFrameBuffer); |
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50 TUint32* end = ptr+(iFrameBufferSize/iPixelSize); |
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51 while(ptr < end) |
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52 { |
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53 *ptr++ = 0xFF000000; // initialise 32bit RGB buffer with opaque alpha (for both 16MU and 16MA) |
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54 } |
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55 } |
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56 else |
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57 { |
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58 Mem::Fill(iFrameBuffer, iFrameBufferSize, 0); |
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59 } |
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60 |
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61 iImageRect = TRect(TPoint(0,0),iFrameSize.AsPoint()); |
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62 SetClippingRect(iImageRect); |
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63 iNeedBufferFlush = ETrue; |
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64 } |
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65 |
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66 CPixelConsumerBase::~CPixelConsumerBase() |
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67 { |
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68 delete [] iFrameBuffer; |
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69 } |
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70 |
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71 void CPixelConsumerBase::Prepare() |
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72 { |
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73 iNeedBufferFlush = ETrue; |
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74 GetBuffer(); |
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75 iCurrentPos.SetXY(0,0); |
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76 } |
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77 |
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78 void CPixelConsumerBase::SetClippingRect(const TRect& aRect) |
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79 { |
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80 iClippingRect = aRect; |
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81 iRealOutputRect = aRect; |
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82 iRealOutputRect.Intersection(iImageRect); |
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83 } |
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84 |
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85 void CPixelConsumerBase::GetBitmap(CFbsBitmap& aBitmap, const TRect& aSourceRect) |
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86 { |
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87 ASSERT(aBitmap.DisplayMode()==EColor16M || aBitmap.DisplayMode()==EColor16MA || |
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88 aBitmap.DisplayMode()==EColor16MU || aBitmap.DisplayMode()==EGray256); |
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89 |
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90 TRect imgRect(TPoint(0,0), iFrameSize.AsPoint() ); |
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91 imgRect.Intersection(aSourceRect); |
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92 ASSERT(imgRect == aSourceRect); // ensure that source rect is within the buffer |
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93 |
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94 if (iNeedBufferFlush) |
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95 { |
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96 TUint8* DataAddr=reinterpret_cast<TUint8*>( aBitmap.DataAddress() ); |
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97 const TUint8* FrameBufAddr =iFrameBuffer + iPixelSize*( aSourceRect.iTl.iY*iFrameSize.iWidth+aSourceRect.iTl.iX ); |
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98 const TInt KLineSize =iPixelSize*aSourceRect.Width(); |
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99 const TInt KFrameBufLineSize=iPixelSize*iFrameSize.iWidth; |
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100 const TInt KBmpScanLineLength= CFbsBitmap::ScanLineLength(aBitmap.SizeInPixels().iWidth, aBitmap.DisplayMode() ); |
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101 for (TInt y=aSourceRect.iBr.iY-aSourceRect.iTl.iY; y; --y, DataAddr +=KBmpScanLineLength, FrameBufAddr+=KFrameBufLineSize) |
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102 { |
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103 Mem::Copy(DataAddr, FrameBufAddr, KLineSize); |
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104 } |
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105 } |
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106 iNeedBufferFlush = EFalse; |
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107 } |
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108 |
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109 void CPixelConsumerBase::Clear(TUint aColour, const TRect& aRect) |
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110 { |
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111 GetBuffer(); |
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112 const TInt width=aRect.Width(); |
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113 if (width<1) |
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114 { |
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115 return; |
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116 } |
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117 |
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118 switch(iPixelSize) |
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119 { |
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120 case KRgbPixelSize: |
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121 { |
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122 const TUint r=Red(aColour); |
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123 const TUint g=Green(aColour); |
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124 const TUint b=Blue(aColour); |
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125 for (TInt y=aRect.iTl.iY; y < aRect.iBr.iY; ++y) |
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126 { |
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127 TUint8* pPixel=(iFrameBuffer+KRgbPixelSize*(y*iFrameSize.iWidth+aRect.iTl.iX)); |
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128 TInt x=width; |
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129 do { |
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130 SetRgbPixel(pPixel, r, g, b); |
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131 pPixel+=KRgbPixelSize; |
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132 } while (--x); |
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133 } |
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134 break; |
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135 } |
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136 case KRgbaPixelSize: |
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137 { |
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138 const TUint r=Red(aColour); |
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139 const TUint g=Green(aColour); |
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140 const TUint b=Blue(aColour); |
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141 const TUint a=Alpha(aColour); |
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142 for (TInt y=aRect.iTl.iY; y < aRect.iBr.iY; ++y) |
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143 { |
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144 TUint8* pPixel=(iFrameBuffer+KRgbaPixelSize*(y*iFrameSize.iWidth+aRect.iTl.iX)); |
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145 TInt x=width; |
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146 do { |
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147 SetRgbaPixel(pPixel, r, g, b, a); |
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148 pPixel+=KRgbaPixelSize; |
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149 } while (--x); |
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150 } |
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151 break; |
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152 } |
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153 case KAlphaPixelSize: |
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154 { |
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155 TUint8* pPixel=iFrameBuffer+KAlphaPixelSize*(aRect.iTl.iY*iFrameSize.iWidth+aRect.iTl.iX); |
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156 for (TInt y=aRect.iTl.iY; y < aRect.iBr.iY; ++y) |
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157 { |
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158 Mem::Fill(pPixel, width, aColour ); |
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159 pPixel += iFrameSize.iWidth; |
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160 } |
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161 break; |
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162 } |
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163 default: |
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164 ASSERT(EFalse); |
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165 } |
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166 } |
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167 |
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168 void CPixelConsumerBase::ClearAlpha(TUint aColour, const TRect& aRect) |
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169 { |
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170 ASSERT(iPixelSize == KRgbaPixelSize); |
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171 |
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172 GetBuffer(); |
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173 const TInt width=aRect.Width(); |
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174 if (width<1) |
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175 { |
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176 return; |
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177 } |
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178 |
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179 const TUint a=Alpha(aColour); |
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180 for (TInt y=aRect.iTl.iY; y < aRect.iBr.iY; ++y) |
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181 { |
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182 TUint8* pPixel=(iFrameBuffer+KRgbaPixelSize*(y*iFrameSize.iWidth+aRect.iTl.iX)); |
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183 TInt x=width; |
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184 do |
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185 { |
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186 pPixel[3] = a; |
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187 pPixel+=KRgbaPixelSize; |
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188 } while (--x); |
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189 } |
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190 } |
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191 |
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192 void CRgbPixelConsumer::SetRGBPixel(TRgbaColour aPixelColour) |
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193 { |
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194 const TPoint RealPos( iOrigin.iX + iCurrentPos.iX, iOrigin.iY + iCurrentPos.iY ); |
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195 if (Contains(iRealOutputRect, RealPos)) |
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196 { |
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197 |
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198 if (NULL != iAlphaConsumer) |
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199 { |
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200 // IF AlphaConsumer (if trans or alpha), then get alpha value |
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201 const TUint alpha= (iAlphaConsumer->Enabled()? Alpha(aPixelColour) : KOpaqueAlpha ); |
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202 // |
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203 // alpha blending is: |
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204 // Aresult * Cresult = Afg*Cfg + Abg*Cbg - Afg*Abg*Cbg OR Afg*Cfg + Cbg * Abg*(1 - Afg) |
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205 // Aresult = Afg + (1 - Afg) * Abg |
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206 // where 0 <= Alpha < 1 |
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207 // However we are using fixed point where |
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208 // 0 <= Alpha <= 0xff |
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209 // |
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210 if (alpha) |
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211 { |
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212 const TInt bufferOffset=RealPos.iY*iFrameSize.iWidth+RealPos.iX; |
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213 TUint8* ptr=iFrameBuffer+KRgbPixelSize*bufferOffset; |
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214 |
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215 if (alpha < KOpaqueAlpha) |
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216 { |
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217 const TUint oldA = iAlphaConsumer->GetPixel(bufferOffset); |
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218 if (oldA) |
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219 { |
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220 const TUint a2=(oldA*(0xffu-alpha)+0x80)>>8; |
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221 |
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222 TUint oldC=TUint(*ptr); |
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223 *ptr++ = TUint8(( Blue(aPixelColour)*alpha + oldC*a2)>>8); |
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224 |
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225 oldC=TUint(*ptr); |
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226 *ptr++ = TUint8(( Green(aPixelColour)*alpha + oldC*a2)>>8); |
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227 |
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228 oldC=*ptr; |
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229 *ptr = TUint8(( Red(aPixelColour)*alpha + a2*oldC )>>8 ); |
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230 |
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231 iAlphaConsumer->SetPixelByBufferOffset(bufferOffset, alpha + a2 ); |
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232 } |
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233 else |
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234 { |
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235 // "old" pixel alpha is fully transparent, so set the pixel and its alpha |
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236 // in the first pass, it will be 0x00 so set both pixel and alpha |
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237 iAlphaConsumer->SetPixelByBufferOffset(bufferOffset, alpha); |
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238 SetRgbPixel(ptr, Red(aPixelColour), Green(aPixelColour), Blue(aPixelColour)); |
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239 } |
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240 } |
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241 else |
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242 { |
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243 // pixel alpha is opaque, so set the pixel and its alpha |
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244 iAlphaConsumer->SetPixelByBufferOffset(bufferOffset, alpha); |
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245 SetRgbPixel(ptr, Red(aPixelColour), Green(aPixelColour), Blue(aPixelColour)); |
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246 } |
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247 } |
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248 } |
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249 else |
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250 { |
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251 // no Alpha blending just set the pixel |
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252 TUint8* ptr=iFrameBuffer+KRgbPixelSize*(RealPos.iY*iFrameSize.iWidth+RealPos.iX); |
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253 SetRgbPixel(ptr, Red(aPixelColour), Green(aPixelColour), Blue(aPixelColour)); |
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254 } |
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255 } |
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256 |
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257 if (++iCurrentPos.iX >= iFrameSize.iWidth) |
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258 { |
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259 iCurrentPos.iX = 0; |
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260 ++iCurrentPos.iY; |
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261 } |
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262 } |
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263 |
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264 void CRgbPixelConsumer::SetRGBAPixel(TRgbaColour aPixelColour) |
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265 { |
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266 const TPoint RealPos( iOrigin.iX + iCurrentPos.iX, iOrigin.iY + iCurrentPos.iY ); |
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267 if (Contains(iRealOutputRect, RealPos)) |
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268 { |
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269 const TInt bufferOffset=RealPos.iY*iFrameSize.iWidth+RealPos.iX; |
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270 TUint8* ptr=iFrameBuffer+KRgbaPixelSize*bufferOffset; |
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271 |
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272 if (NULL != iAlphaConsumer) |
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273 { |
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274 // IF AlphaConsumer (if trans or alpha), then get alpha value |
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275 const TUint alpha= (iAlphaConsumer->Enabled()? Alpha(aPixelColour) : KOpaqueAlpha ); |
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276 // alpha blending is: |
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277 // Aresult * Cresult = Afg*Cfg + Abg*Cbg - Afg*Abg*Cbg OR Afg*Cfg + Cbg * Abg*(1 - Afg) |
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278 // Aresult = Afg + (1 - Afg) * Abg |
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279 // where 0 <= Alpha < 1 |
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280 // However we are using fixed point where |
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281 // 0 <= Alpha <= 0xff |
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282 |
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283 if (alpha) |
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284 { |
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285 if (alpha < KOpaqueAlpha) |
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286 { |
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287 const TUint oldA = iAlphaConsumer->GetPixel(bufferOffset); |
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288 if (oldA) |
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289 { |
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290 const TUint a2=(oldA*(0xffu-alpha)+0x80)>>8; |
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291 |
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292 TUint oldC=TUint(*ptr); |
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293 *ptr++ = TUint8(( Blue(aPixelColour)*alpha + oldC*a2)>>8); |
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294 |
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295 oldC=TUint(*ptr); |
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296 *ptr++ = TUint8(( Green(aPixelColour)*alpha + oldC*a2)>>8); |
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297 |
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298 oldC=*ptr; |
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299 *ptr++ = TUint8(( Red(aPixelColour)*alpha + a2*oldC )>>8 ); |
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300 |
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301 *ptr = iAlphaEnabled ? TUint8(Alpha((alpha + a2) << KAlphaShift)) : KOpaqueAlpha; |
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302 |
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303 iAlphaConsumer->SetPixelByBufferOffset(bufferOffset, alpha + a2); |
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304 } |
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305 else |
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306 { |
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307 // "old" pixel alpha is fully transparent, so set the pixel and its alpha |
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308 // in the first pass, it will be 0x00 so set both pixel and alpha |
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309 iAlphaConsumer->SetPixelByBufferOffset(bufferOffset, alpha); |
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310 SetRgbaPixel(ptr, Red(aPixelColour), Green(aPixelColour), Blue(aPixelColour), iAlphaEnabled ? Alpha((alpha) << KAlphaShift) : KOpaqueAlpha); |
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311 } |
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312 } |
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313 else |
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314 { |
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315 iAlphaConsumer->SetPixelByBufferOffset(bufferOffset, alpha); |
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316 SetRgbaPixel(ptr, Red(aPixelColour), Green(aPixelColour), Blue(aPixelColour), KOpaqueAlpha); |
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317 } |
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318 } |
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319 } |
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320 else // dealing with source with no transparency |
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321 { |
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322 // Just set the pixel to fully opaque |
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323 SetRgbaPixel(ptr, Red(aPixelColour), Green(aPixelColour), Blue(aPixelColour), KOpaqueAlpha); |
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324 } |
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325 } |
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326 |
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327 if (++iCurrentPos.iX >= iFrameSize.iWidth) |
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328 { |
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329 iCurrentPos.iX = 0; |
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330 ++iCurrentPos.iY; |
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331 } |
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332 } |
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333 |