diff -r 000000000000 -r 5d03bc08d59c graphicsdeviceinterface/screendriver/sbit/BMDRAW2.CPP --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graphicsdeviceinterface/screendriver/sbit/BMDRAW2.CPP Tue Feb 02 01:47:50 2010 +0200 @@ -0,0 +1,1316 @@ +// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). +// All rights reserved. +// This component and the accompanying materials are made available +// under the terms of "Eclipse Public License v1.0" +// which accompanies this distribution, and is available +// at the URL "http://www.eclipse.org/legal/epl-v10.html". +// +// Initial Contributors: +// Nokia Corporation - initial contribution. +// +// Contributors: +// +// Description: +// + +#include "BMDRAW.H" + +GLREF_D const TUint32 wordlutab[256]; + +const TInt KBitsPerPixel = 2; +const TInt KPixelsPerByte = 4; +const TInt KPixelsPerWord = 16; + +//Initializes iSize, iDrawRect, iLongWidth, iScanlineWords data members. +//It should be called every time when iSize is going to be changed - from Construct(). +//@param aSize Physical screen size in pixels. +//@panic EScreenDriverPanicInvalidSize - Invalid aSize parameter. This might happen if the +//device is scaled and the scaling origin goes outside physical drawing rectangle. +void CDrawTwoBppBitmap::SetSize(const TSize& aSize) + { + CDrawBitmap::SetSize(aSize); + __ASSERT_DEBUG(iSize == aSize, User::Invariant()); + iLongWidth = (iSize.iWidth + (KPixelsPerWord - 1)) & ~(KPixelsPerWord - 1); + iScanLineWords = iLongWidth / KPixelsPerWord; + } + +TInt CDrawTwoBppBitmap::Construct(TSize aSize) + { + return Construct(aSize, ((aSize.iWidth + (KPixelsPerWord - 1)) & ~(KPixelsPerWord - 1)) / KPixelsPerByte); + } + +TInt CDrawTwoBppBitmap::Construct(TSize aSize, TInt aStride) + { + iBits = NULL; + iDispMode = EGray4; + CDrawBitmap::SetSize(aSize); + __ASSERT_DEBUG(iSize == aSize, User::Invariant()); + if (aStride & 3) + return KErrArgument; + iLongWidth = aStride * KPixelsPerByte; + if (iLongWidth < aSize.iWidth) + return KErrArgument; + iScanLineWords = aStride >> 2; + TInt size = 1 + (Max(aSize.iWidth,aSize.iHeight) >> 2); + if(size < 0) + return KErrArgument; + iScanLineBuffer = (TUint32*)(User::Heap().Alloc(size)); + if (iScanLineBuffer == NULL) + return KErrNoMemory; + return KErrNone; + } + +void CDrawTwoBppBitmap::Shadow(TRgb& aColor) + { + if (iShadowMode & EFade) + aColor = TRgb::_Gray256(FadeGray(aColor._Gray16() * 17)); + + if (iShadowMode & EShadow) + { + TInt gray16 = aColor._Gray16(); + gray16 = Max(gray16 - 5,0); + aColor = TRgb::_Gray16(gray16); + } + } + +TUint32 CDrawTwoBppBitmap::ColorInt(TRgb aColor) const + { + TUint32 colorWord = aColor._Gray4(); + + colorWord |= colorWord << 2; + colorWord |= colorWord << 4; + colorWord |= colorWord << 8; + colorWord |= colorWord << 16; + + return colorWord; + } + +void CDrawTwoBppBitmap::HashInt(TUint32& aInt1,TUint32& aInt2,TRgb aColor,TInt aX,TInt aY) const + { + TUint32 int1 = Hash(aColor._Gray16(),aX,aY); + TUint32 int2 = Hash(aColor._Gray16(),aX + 1,aY); + aInt1 = (int1 >> 2) | (int2 & 0xc); + + aInt1 |= aInt1 << 4; + aInt1 |= aInt1 << 8; + aInt1 |= aInt1 << 16; + + int1 = Hash(aColor._Gray16(),aX,aY + 1); + int2 = Hash(aColor._Gray16(),aX + 1,aY + 1); + aInt2 = (int1 >> 2) | (int2 & 0xc); + + aInt2 |= aInt2 << 4; + aInt2 |= aInt2 << 8; + aInt2 |= aInt2 << 16; + } + +void CDrawTwoBppBitmap::InvertBuffer(TInt aLength,TUint32* aBuffer) + { + const TUint32* const limit = aBuffer + ((aLength + KPixelsPerWord - 1) / KPixelsPerWord); + + while (aBuffer < limit) + *aBuffer++ ^= 0xffffffff; + } + +void CDrawTwoBppBitmap::MapColors(const TRect& aRect,const TRgb* aColors,TInt aNumPairs,TBool aMapForwards) + { + __ASSERT_DEBUG(aRect.iTl.iX>=0 && aRect.iBr.iX<=iSize.iWidth,Panic(EScreenDriverPanicOutOfBounds)); + __ASSERT_DEBUG(aRect.iTl.iY>=0 && aRect.iBr.iY<=iSize.iHeight,Panic(EScreenDriverPanicOutOfBounds)); + __ASSERT_DEBUG(aColors,Panic(EScreenDriverPanicNullPointer)); + __ASSERT_DEBUG(aNumPairs>0,Panic(EScreenDriverPanicZeroLength)); + + const TInt offset = aMapForwards ? 0 : 1; + TUint32* colorMap; + TUint32 evenColorMap[4]; + TUint32 oddColorMap[4]; + + for (TInt colorIndex = 0; colorIndex <= 3; colorIndex++) + { + evenColorMap[colorIndex] = ColorInt(TRgb::_Gray4(colorIndex)); + oddColorMap[colorIndex] = evenColorMap[colorIndex]; + } + + for (TInt index = 0; index < 4; index++) + { + for (TInt paircount = 0; paircount < aNumPairs; paircount++) + { + if (aColors[(paircount * 2) + offset]._Gray4() == index) + { + HashInt(evenColorMap[index],oddColorMap[index],aColors[(paircount * 2) + 1 - offset],0,0); + break; + } + } + } + + TInt x = aRect.iTl.iX; + TInt y = aRect.iTl.iY; + TInt startLong = (aRect.iTl.iX + KPixelsPerWord - 1) & (~0xf); + TInt finishLong = aRect.iBr.iX & (~0xf); + TInt startShift = (startLong - x) * KBitsPerPixel; + TInt finishShift = (KPixelsPerWord - aRect.iBr.iX + finishLong) * KBitsPerPixel; + TUint32* base = ScanLine(y); + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (y & 1) + colorMap = oddColorMap; + else + colorMap = evenColorMap; + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + const TUint32 invertedMask = ~mask; + + for (; y < aRect.iBr.iY; y++) + { + TUint32 newcolor = MapInt(pixelPtrLimit[0],colorMap) & mask; + + pixelPtrLimit[0] &= invertedMask; + pixelPtrLimit[0] |= newcolor; + pixelPtrLimit += iScanLineWords; + + if (colorMap == oddColorMap) + colorMap = evenColorMap; + else + colorMap = oddColorMap; + } + + return; + } + + for (; y < aRect.iBr.iY; y++) + { + if (x < startLong) + { + TUint32 newcolor = MapInt(pixelPtr[-1],colorMap); + pixelPtr[-1] = PasteInt(pixelPtr[-1],newcolor,startShift); + } + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] = MapInt(tempPixelPtr[0],colorMap); + + if (finishLong < aRect.iBr.iX) + { + TUint32 newcolor = MapInt(pixelPtrLimit[0],colorMap); + pixelPtrLimit[0] = PasteInt(newcolor,pixelPtrLimit[0],finishShift); + } + + base += iScanLineWords; + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + + if (colorMap == oddColorMap) + colorMap = evenColorMap; + else + colorMap = oddColorMap; + } + } + +TUint32 CDrawTwoBppBitmap::MapInt(TUint32 aInt,TUint32* aColorMap) const + { + TUint32 mask = 3; + TUint32 newInt = 0; + + while (mask) + { + newInt |= mask & (aColorMap[aInt & 3]); + aInt >>= 2; + mask <<= 2; + } + + return newInt; + } + +/** Copies a number of pixels into a word-aligned buffer without format translation. + Note that the byte length to the target buffer is honoured, + but the end contents of the last byte are generally overwritten with extra pixel data (or garbage) + Note that I am assuming the compiler optimiser will convert all these divides and multiplies into shifts! +@param aX x coordinate to start copy from (need not be aligned at all) +@param aY y coordinate to copy line from +@param aLength number of pixels to copy +@param aBuffer target word-aligned buffer (but may or may not be word length) + **/ +void CDrawTwoBppBitmap::ReadLine(TInt aX,TInt aY,TInt aLength,TAny* aBuffer) const + { + TUint32* pixelPtr = ScanLine(aY); + TInt startLongPix = aX & -KPixelsPerWord; + pixelPtr += startLongPix / KPixelsPerWord; + TUint32* bufferPtr = (TUint32*)aBuffer; + TInt wordsCnt = (aLength+KPixelsPerByte-1) / KPixelsPerWord; //how many words to write to target + TInt restPixels = aLength - wordsCnt * KPixelsPerWord; //how many pixels left to copy + TInt bytesCnt = (restPixels+KPixelsPerByte-1) / KPixelsPerByte ; //how many target bytes to copy + TInt shiftBits = aX - startLongPix; + restPixels=shiftBits+restPixels; //How many pixels are read from the second word by the final word copy + if (bytesCnt==0 && shiftBits && restPixels<=0) + { + // This correction is required because although a last whole word will be written to the target buffer, + // this special test indicates that the required significant data bits plus the shift + // add up to one word (or less) to be read. + // The copy words optimisation used to copy the main body of the line + // will read from the next location after the copy, + // but this may not always be accessable memory (on the last scanline) + // The correction is not required if the second word would need to be read anyway. + //eg we want to copy 7 nibbles with a 1 nibble shift (16 color), restpixels would be 0 + bytesCnt=4; + wordsCnt--; + } + //How many pixels are read from the second word in the final byte copy? + //If zero (or less) then the second word should not be read in the copy bytes phase + //really this should be an else of the if above, but this gives the same end condition. + //eg we want to copy 5 nibbles with a 2 nibble shift (16 color), restpixels would be -1. + restPixels-=KPixelsPerWord; + ReadLineCommon(pixelPtr,bufferPtr,wordsCnt,restPixels,bytesCnt,shiftBits*KBitsPerPixel); + } + + +TRgb CDrawTwoBppBitmap::ReadRgbNormal(TInt aX,TInt aY) const + { + TUint32 colorWord = *(ScanLine(aY) + (aX / KPixelsPerWord)); + colorWord >>= ((aX & 0xf) * KBitsPerPixel); + return TRgb::_Gray4(colorWord & 3); + } + +TUint32 CDrawTwoBppBitmap::ShadowWord(TUint32 aWord) + { + TUint32 decrement = (0xaaaaaaaa & aWord) >> 1; + decrement |= (0x55555555 & aWord); // decrement is OR of each pair of bits + return aWord - decrement; // Only shadow pixels greater than zero (decrement == 1) + } + +TUint32 CDrawTwoBppBitmap::FadeWord(TUint32 aWord) + { + const TInt fadeArray[4] = { FadeGray(0) >> 6, FadeGray(85) >> 6, FadeGray(170) >> 6, FadeGray(255) >> 6 }; + + TUint32 fadedWord = 0; + + for (TInt bitShift = 0; bitShift < 32; bitShift += 2) + fadedWord |= fadeArray[(aWord >> bitShift) & 3] << bitShift; + + return fadedWord; + } + +void CDrawTwoBppBitmap::ShadowArea(const TRect& aRect) + { + __ASSERT_DEBUG(aRect.iTl.iX>=0 && aRect.iBr.iX<=iSize.iWidth,Panic(EScreenDriverPanicOutOfBounds)); + __ASSERT_DEBUG(aRect.iTl.iY>=0 && aRect.iBr.iY<=iSize.iHeight,Panic(EScreenDriverPanicOutOfBounds)); + + const TInt startLong = (aRect.iTl.iX + KPixelsPerWord - 1) & ~0xf; + const TInt finishLong = aRect.iBr.iX & ~0xf; + const TInt startShift = (startLong - aRect.iTl.iX) * KBitsPerPixel; + const TInt finishShift = (KPixelsPerWord - aRect.iBr.iX + finishLong) * KBitsPerPixel; + TUint32* base = ScanLine(aRect.iTl.iY); + + if (iShadowMode & EFade) + { + if (finishLong < startLong) + { + TUint32* pixelPtr = base + (finishLong / KPixelsPerWord); + const TUint32* const pixelPtrRowLimit = pixelPtr + (aRect.Height() * iScanLineWords); + + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + const TUint32 inverseMask = ~mask; + + while (pixelPtr < pixelPtrRowLimit) + { + TUint32 shadowed = FadeWord(pixelPtr[0]) & mask; + + pixelPtr[0] &= inverseMask; + pixelPtr[0] |= shadowed; + + pixelPtr += iScanLineWords; + } + } + else + { + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + const TUint32* const pixelPtrRowLimit = pixelPtr + (aRect.Height() * iScanLineWords); + + while (pixelPtr < pixelPtrRowLimit) + { + if (aRect.iTl.iX < startLong) + pixelPtr[-1] = PasteInt(pixelPtr[-1],FadeWord(pixelPtr[-1]),startShift); + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] = FadeWord(tempPixelPtr[0]); + + if (finishLong < aRect.iBr.iX) + pixelPtrLimit[0] = PasteInt(FadeWord(pixelPtrLimit[0]),pixelPtrLimit[0],finishShift); + + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + } + } + } + + if (iShadowMode & EShadow) + { + if (finishLong < startLong) + { + TUint32* pixelPtr = base + (finishLong / KPixelsPerWord); + const TUint32* const pixelPtrRowLimit = pixelPtr + (aRect.Height() * iScanLineWords); + + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + const TUint32 inverseMask = ~mask; + + while (pixelPtr < pixelPtrRowLimit) + { + TUint32 shadowed = ShadowWord(pixelPtr[0]) & mask; + + pixelPtr[0] &= inverseMask; + pixelPtr[0] |= shadowed; + + pixelPtr += iScanLineWords; + } + } + else + { + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + const TUint32* const pixelPtrRowLimit = pixelPtr + (aRect.Height() * iScanLineWords); + + while (pixelPtr < pixelPtrRowLimit) + { + if (aRect.iTl.iX < startLong) + pixelPtr[-1] = PasteInt(pixelPtr[-1],ShadowWord(pixelPtr[-1]),startShift); + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] = ShadowWord(tempPixelPtr[0]); + + if (finishLong < aRect.iBr.iX) + pixelPtrLimit[0] = PasteInt(ShadowWord(pixelPtrLimit[0]),pixelPtrLimit[0],finishShift); + + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + } + } + } + } + +void CDrawTwoBppBitmap::ShadeBuffer(TInt aLength,TUint32* aBuffer) + { + const TUint32* limit = aBuffer + ((aLength + KPixelsPerWord - 1) / KPixelsPerWord); + + while (aBuffer < limit) + { + TUint32 secondbit = (0xaaaaaaaa & aBuffer[0]); + *aBuffer++ = secondbit | (secondbit >> 1); + } + } + +void CDrawTwoBppBitmap::ShadowBuffer(TInt aLength,TUint32* aBuffer) + { + __ASSERT_DEBUG(aBuffer != NULL,Panic(EScreenDriverPanicInvalidParameter)); + + const TUint32* limit = aBuffer + ((aLength + KPixelsPerWord - 1) / KPixelsPerWord); + + if (iShadowMode & EFade) + { + for (TUint32* buffer = aBuffer; buffer < limit; buffer++) + buffer[0] = FadeWord(buffer[0]); + } + + if (iShadowMode & EShadow) + { + for (TUint32* buffer = aBuffer; buffer < limit; buffer++) + buffer[0] = ShadowWord(buffer[0]); + } + } + +void CDrawTwoBppBitmap::WriteRgb(TInt aX,TInt aY,TRgb aColor) + { + TInt col=0; + + if (iUserDispMode != EGray2) + col = Hash(aColor._Gray16(),aX,aY) >> 2; + else + { + if (aColor._Gray2()) + col = 3; + } + + TUint32* pixelPtr = ScanLine(aY) + (aX / KPixelsPerWord); + const TInt shift = (aX & 0xf) * KBitsPerPixel; + pixelPtr[0] &= ~(3 << shift); + pixelPtr[0] |= col << shift; + } + +void CDrawTwoBppBitmap::WriteBinary(TInt aX,TInt aY,TUint32* aData,TInt aLength,TInt aHeight,TRgb aColor) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + const TBool monoText = (aColor == KRgbBlack); + + const TInt previousLong = aX & (~0xf); + const TInt bitShift = (aX - previousLong) * KBitsPerPixel; + const TBool secondwordenable = (aX + aLength) > (previousLong + KPixelsPerWord); + TUint32* pixelPtr = ScanLine(aY) + (aX / KPixelsPerWord); + const TInt mask = 0xffffffff >> (32 - aLength); + TUint32* datalimit = aData + aHeight; + + if (monoText && !secondwordenable) + { + while (aData < datalimit) + { + TUint32 dataitem = *aData++; + dataitem &= mask; + TUint32 firsthalf = wordlutab[dataitem & 0xff]; + firsthalf |= wordlutab[(dataitem >> 8) & 0xff] << 16; + *pixelPtr &= ~(firsthalf << bitShift); + pixelPtr += iScanLineWords; + } + return; + } + + const TInt reverseshift = 32 - bitShift; + const TBool thirdwordenable = (aX + aLength) > (previousLong + 32); + + if (monoText) + { + while (aData < datalimit) + { + TUint32 dataitem = *aData++; + dataitem &= mask; + TUint32 firsthalf = wordlutab[dataitem & 0xff]; + dataitem >>= 8; + firsthalf |= wordlutab[dataitem & 0xff] << 16; + dataitem >>= 8; + TUint32 secondhalf = wordlutab[dataitem & 0xff]; + dataitem >>= 8; + secondhalf |= wordlutab[dataitem & 0xff] << 16; + const TUint32 firstword = firsthalf << bitShift; + TUint32 secondword = secondhalf << bitShift; + TUint32 thirdword = 0; + + if (bitShift) + { + secondword |= firsthalf >> reverseshift; + thirdword = secondhalf >> reverseshift; + } + + pixelPtr[0] &= ~firstword; + pixelPtr[1] &= ~secondword; + pixelPtr[2] &= ~thirdword; + pixelPtr += iScanLineWords; + } + } + else + { + TUint32 colorWord1,colorWord2; + HashInt(colorWord1,colorWord2,aColor,0,aY); + TUint32 colorWord = colorWord1; + + while (aData < datalimit) + { + TUint32 dataitem = *aData++; + dataitem &= mask; + TUint32 firsthalf = wordlutab[dataitem & 0xff]; + dataitem >>= 8; + firsthalf |= wordlutab[dataitem & 0xff] << 16; + dataitem >>= 8; + TUint32 secondhalf = wordlutab[dataitem & 0xff]; + dataitem >>= 8; + secondhalf |= wordlutab[dataitem & 0xff] << 16; + TUint32 firstword = firsthalf << bitShift; + TUint32 secondword = secondhalf << bitShift; + TUint32 thirdword = 0; + + if (bitShift) + { + secondword |= firsthalf >> reverseshift; + thirdword = secondhalf >> reverseshift; + } + + pixelPtr[0] &= ~firstword; + if (secondwordenable) + pixelPtr[1] &= ~secondword; + if (thirdwordenable) + pixelPtr[2] &= ~thirdword; + + if (colorWord) + { + pixelPtr[0] |= firstword & colorWord; + if (secondwordenable) + pixelPtr[1] |= secondword & colorWord; + if (thirdwordenable) + pixelPtr[2] |= thirdword & colorWord; + } + + if (colorWord == colorWord1) + colorWord = colorWord2; + else + colorWord = colorWord1; + + pixelPtr += iScanLineWords; + } + } + } + +void CDrawTwoBppBitmap::WriteBinaryOp(TInt aX,TInt aY,TUint32* aData,TInt aLength,TInt aHeight,TRgb aColor,CGraphicsContext::TDrawMode aDrawMode) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + TUint32 colorWord1,colorWord2; + HashInt(colorWord1,colorWord2,aColor,0,aY); + TUint32 colorWord = colorWord1; + TUint32* pixelPtr = ScanLine(aY) + (aX / KPixelsPerWord); + const TUint32* pixelPtrLimit = ScanLine(aY + aHeight) + (aX / KPixelsPerWord); + const TUint32 initialMask = (3 << ((aX & 0xf) * KBitsPerPixel)); + + if (colorWord1 || colorWord2) + { + while (pixelPtr < pixelPtrLimit) + { + TUint32 dataMask = 1; + TUint32 mask = initialMask; + TUint32* tempPixelPtr = pixelPtr; + + for (TInt count = 0; count < aLength; count++,dataMask <<= 1,mask <<= 2) + { + if (!mask) + { + mask = 3; + tempPixelPtr++; + } + + if (aData[0] & dataMask) + { + if (aDrawMode == CGraphicsContext::EDrawModeXOR) + tempPixelPtr[0] ^= mask & colorWord; + else if (aDrawMode == CGraphicsContext::EDrawModeAND) + tempPixelPtr[0] &= (mask & colorWord) | ~mask; + else if (aDrawMode == CGraphicsContext::EDrawModeOR) + tempPixelPtr[0] |= mask & colorWord; + } + } + + aData++; + pixelPtr += iScanLineWords; + colorWord = (colorWord == colorWord1) ? colorWord2 : colorWord1; + } + } + else + { + if (aDrawMode == CGraphicsContext::EDrawModeAND) + { + while (pixelPtr < pixelPtrLimit) + { + TUint32 dataMask = 1; + TUint32 mask = initialMask; + TUint32* tempPixelPtr = pixelPtr; + + for (TInt count = 0; count < aLength; count++,dataMask <<= 1,mask <<= 2) + { + if (!mask) + { + mask = 3; + tempPixelPtr++; + } + + if (aData[0] & dataMask) + tempPixelPtr[0] &= ~mask; + } + + aData++; + pixelPtr += iScanLineWords; + } + } + } + } + +void CDrawTwoBppBitmap::WriteBinaryLineVertical(TInt aX,TInt aY,TUint32* aData,TInt aHeight,TRgb aColor,TBool aUp) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + TUint32 col1 = Hash(aColor._Gray16(),aX,aY) / 4; + TUint32 col2 = Hash(aColor._Gray16(),aX,aY + 1) / 4; + const TInt yLimit = aY + (aUp ? -aHeight : aHeight); + const TInt scanlinediff = aUp ? -iScanLineWords : iScanLineWords; + const TInt startWord = aX / KPixelsPerWord; + const TInt startShift = (aX & 0xf) * KBitsPerPixel; + TUint32* pixelPtr = ScanLine(aY) + startWord; + TUint32* pixelPtrLimit = ScanLine(yLimit) + startWord; + const TUint32 mask = ~(3 << startShift); + TUint32 dataMask = 1; + + if (col1 || col2) + { + col1 <<= startShift; + col2 <<= startShift; + TUint32 col = col1; + + while (pixelPtr != pixelPtrLimit) + { + if (!dataMask) + { + dataMask = 1; + aData++; + } + + if (aData[0] & dataMask) + { + pixelPtr[0] &= mask; + pixelPtr[0] |= col; + } + + dataMask <<= 1; + pixelPtr += scanlinediff; + col = (col == col2) ? col1 : col2; + } + } + else + { + while (pixelPtr != pixelPtrLimit) + { + if (!dataMask) + { + dataMask = 1; + aData++; + } + + if (aData[0] & dataMask) + pixelPtr[0] &= mask; + + dataMask <<= 1; + pixelPtr += scanlinediff; + } + } + } + +void CDrawTwoBppBitmap::WriteLine(TInt aX,TInt aY,TInt aLength,TUint32* aBuffer) + { + if (iUserDispMode == EGray2) + ShadeBuffer(aLength,(TUint32*)aBuffer); + + const TInt startLong = (aX + KPixelsPerWord - 1) & (~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + TUint32* base = ScanLine(aY); + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt startShiftExtra = 32 - startShift; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << startShiftExtra); + pixelPtrLimit[0] &= ~mask; + pixelPtrLimit[0] |= (aBuffer[0] << startShiftExtra) & mask; + return; + } + + const TInt wordsToCopy = pixelPtrLimit - pixelPtr; + + if (startShift > 0) + { + pixelPtr[-1] &= 0xffffffff >> startShift; + pixelPtr[-1] |= aBuffer[0] << startShiftExtra; + + CopyOffset(pixelPtr,aBuffer,wordsToCopy,startShift); + aBuffer += wordsToCopy; + + if (finishLong < aX + aLength) + { + TUint32 first = (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + pixelPtrLimit[0] = PasteInt(first,pixelPtrLimit[0],finishShift); + } + } + else + { + Mem::Copy(pixelPtr,aBuffer,wordsToCopy * sizeof(TUint32)); + aBuffer += wordsToCopy; + + if (finishLong < aX + aLength) + pixelPtrLimit[0] = PasteInt(aBuffer[0],pixelPtrLimit[0],finishShift); + } + } + +void CDrawTwoBppBitmap::WriteLineXOR(TInt aX,TInt aY,TInt aLength,TUint32* aBuffer) + { + if (iUserDispMode == EGray2) + ShadeBuffer(aLength,(TUint32*)aBuffer); + + const TInt startLong = (aX + KPixelsPerWord - 1) & (~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + TUint32* base = ScanLine(aY); + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt startShiftExtra = 32 - startShift; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << startShiftExtra); + pixelPtrLimit[0] ^= (aBuffer[0] << startShiftExtra) & mask; + return; + } + + if (startShift > 0) + { + pixelPtr[-1] ^= aBuffer[0] << startShiftExtra; + + while (pixelPtr < pixelPtrLimit) + { + pixelPtr[0] ^= (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + + pixelPtr++; + aBuffer++; + } + + if (finishLong < aX + aLength) + { + TUint32 first = (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + pixelPtrLimit[0] ^= PasteInt(first,0,finishShift); + } + } + else + { + while (pixelPtr < pixelPtrLimit) + *pixelPtr++ ^= *aBuffer++; + + if (finishLong < aX + aLength) + pixelPtrLimit[0] ^= PasteInt(aBuffer[0],0,finishShift); + } + } + +void CDrawTwoBppBitmap::WriteLineAND(TInt aX,TInt aY,TInt aLength,TUint32* aBuffer) + { + if (iUserDispMode == EGray2) + ShadeBuffer(aLength,(TUint32*)aBuffer); + + const TInt startLong = (aX + KPixelsPerWord - 1) & (~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + TUint32* base = ScanLine(aY); + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt startShiftExtra = 32 - startShift; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << startShiftExtra); + pixelPtrLimit[0] &= (aBuffer[0] << startShiftExtra) | ~mask; + return; + } + + if (startShift > 0) + { + pixelPtr[-1] &= (aBuffer[0] << startShiftExtra) | (0xffffffff >> startShift); + + while (pixelPtr < pixelPtrLimit) + { + pixelPtr[0] &= (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + + pixelPtr++; + aBuffer++; + } + + if (finishLong < aX + aLength) + { + TUint32 first = (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + pixelPtrLimit[0] &= PasteInt(first,0xffffffff,finishShift); + } + } + else + { + while (pixelPtr < pixelPtrLimit) + *pixelPtr++ &= *aBuffer++; + + if (finishLong < aX + aLength) + pixelPtrLimit[0] &= PasteInt(aBuffer[0],0xffffffff,finishShift); + } + } + +void CDrawTwoBppBitmap::WriteLineOR(TInt aX,TInt aY,TInt aLength,TUint32* aBuffer) + { + if (iUserDispMode == EGray2) + ShadeBuffer(aLength,(TUint32*)aBuffer); + + const TInt startLong = (aX + KPixelsPerWord - 1) & (~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + TUint32* base = ScanLine(aY); + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt startShiftExtra = 32 - startShift; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << startShiftExtra); + pixelPtrLimit[0] |= (aBuffer[0] << startShiftExtra) & mask; + return; + } + + if (startShift > 0) + { + pixelPtr[-1] |= aBuffer[0] << startShiftExtra; + + while (pixelPtr < pixelPtrLimit) + { + pixelPtr[0] |= (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + + pixelPtr++; + aBuffer++; + } + + if (finishLong < aX + aLength) + { + TUint32 first = (aBuffer[0] >> startShift) | (aBuffer[1] << startShiftExtra); + pixelPtrLimit[0] |= PasteInt(first,0,finishShift); + } + } + else + { + while (pixelPtr < pixelPtrLimit) + *pixelPtr++ |= *aBuffer++; + + if (finishLong < aX + aLength) + pixelPtrLimit[0] |= PasteInt(aBuffer[0],0,finishShift); + } + } + +/** +MAlphaBlend::WriteRgbAlphaLine() implementation. +@see MAlphaBlend::WriteRgbAlphaLine() +*/ +void CDrawTwoBppBitmap::WriteRgbAlphaLine(TInt aX, TInt aY, TInt aLength, + const TUint8* aRgbBuffer, + const TUint8* aMaskBuffer, + MAlphaBlend::TShadowing aShadowing, + CGraphicsContext::TDrawMode /*aDrawMode*/) + { + TUint8* pixelPtr = REINTERPRET_CAST(TUint8*,ScanLine(aY)) + (aX / 4); + const TUint8* maskBufferPtrLimit = aMaskBuffer + aLength; + TInt bitOffset = (aX & 3) * KBitsPerPixel; + TRgb pixelClr; + + while (aMaskBuffer < maskBufferPtrLimit) + { + TRgb srcColor(aRgbBuffer[2],aRgbBuffer[1],aRgbBuffer[0]); + if(aShadowing == MAlphaBlend::EShdwBefore) + { + Shadow(srcColor); + } + TInt pixelValue = ((pixelPtr[0] >> bitOffset) & 0x03) * (255 - aMaskBuffer[0]); + const TInt srceValue = (((srcColor.Red() << 1) + + srcColor.Green() + (srcColor.Green() << 2) + + srcColor.Blue()) >> 9) * aMaskBuffer[0]; + + pixelValue += srceValue; + pixelValue /= 255; + + pixelClr = TRgb::_Gray4(pixelValue); + if(aShadowing == MAlphaBlend::EShdwAfter) + { + Shadow(pixelClr); + } + MapColorToUserDisplayMode(pixelClr); + + pixelPtr[0] &= ~(3 << bitOffset); + pixelPtr[0] |= TUint8(pixelClr._Gray4() << bitOffset); + + bitOffset += 2; + if (bitOffset == 8) + { + bitOffset = 0; + pixelPtr++; + } + + aRgbBuffer += 4; + aMaskBuffer++; + } + } + +void CDrawTwoBppBitmap::WriteRgbMulti(TInt aX,TInt aY,TInt aLength,TInt aHeight,TRgb aColor) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + const TInt startLong = (aX + KPixelsPerWord - 1)&(~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + const TInt yLimit = aY + aHeight; + TUint32 colorWord1,colorWord2; + + if (aColor._Gray16() % 5 != 0) + HashInt(colorWord1,colorWord2,aColor,startLong,aY); + else + colorWord1 = colorWord2 = ColorInt(aColor); + + TUint32 colorWord = colorWord1; + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* base = ScanLine(aY); + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + const TUint32 invertedMask = ~mask; + colorWord &= mask; + colorWord1 &= mask; + colorWord2 &= mask; + + for (; aY < yLimit; aY++) + { + pixelPtrLimit[0] &= invertedMask; + pixelPtrLimit[0] |= colorWord; + + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + return; + } + + const TBool extra = (finishLong < aX + aLength); + + for (; aY < yLimit; aY++) + { + if (startShift > 0) + pixelPtr[-1] = PasteInt(pixelPtr[-1],colorWord,startShift); + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] = colorWord; + + if (extra) + pixelPtrLimit[0] = PasteInt(colorWord,pixelPtrLimit[0],finishShift); + + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + } + +void CDrawTwoBppBitmap::WriteRgbMultiXOR(TInt aX,TInt aY,TInt aLength,TInt aHeight,TRgb aColor) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + const TInt startLong = (aX + KPixelsPerWord - 1)&(~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + const TInt yLimit = aY + aHeight; + TUint32 colorWord1,colorWord2; + + if (aColor._Gray16() % 5 != 0) + HashInt(colorWord1,colorWord2,aColor,startLong,aY); + else + colorWord1 = colorWord2 = ColorInt(aColor); + + TUint32 colorWord = colorWord1; + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* base = ScanLine(aY); + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + colorWord &= mask; + colorWord1 &= mask; + colorWord2 &= mask; + + for (; aY < yLimit; aY++) + { + pixelPtrLimit[0] ^= colorWord; + + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + return; + } + + const TBool extra = (finishLong < aX + aLength); + + for (; aY < yLimit; aY++) + { + if (startShift > 0) + pixelPtr[-1] ^= PasteInt(0,colorWord,startShift); + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] ^= colorWord; + + if (extra) + pixelPtrLimit[0] ^= PasteInt(colorWord,0,finishShift); + + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + } + +void CDrawTwoBppBitmap::WriteRgbMultiAND(TInt aX,TInt aY,TInt aLength,TInt aHeight,TRgb aColor) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + const TInt startLong = (aX + KPixelsPerWord - 1)&(~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + const TInt yLimit = aY + aHeight; + TUint32 colorWord1,colorWord2; + + if (aColor._Gray16() % 5 != 0) + HashInt(colorWord1,colorWord2,aColor,startLong,aY); + else + colorWord1 = colorWord2 = ColorInt(aColor); + + TUint32 colorWord = colorWord1; + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* base = ScanLine(aY); + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + const TUint32 invertedMask = ~mask; + colorWord &= mask; + colorWord1 &= mask; + colorWord2 &= mask; + + for (; aY < yLimit; aY++) + { + pixelPtrLimit[0] &= colorWord | invertedMask; + + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + return; + } + + const TBool extra = (finishLong < aX + aLength); + + for (; aY < yLimit; aY++) + { + if (startShift > 0) + pixelPtr[-1] &= PasteInt(0xffffffff,colorWord,startShift); + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] &= colorWord; + + if (extra) + pixelPtrLimit[0] &= PasteInt(colorWord,0xffffffff,finishShift); + + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + } + +void CDrawTwoBppBitmap::WriteRgbMultiOR(TInt aX,TInt aY,TInt aLength,TInt aHeight,TRgb aColor) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + + const TInt startLong = (aX + KPixelsPerWord - 1)&(~0xf); + const TInt finishLong = (aX + aLength) & (~0xf); + const TInt yLimit = aY + aHeight; + TUint32 colorWord1,colorWord2; + + if (aColor._Gray16() % 5 != 0) + HashInt(colorWord1,colorWord2,aColor,startLong,aY); + else + colorWord1 = colorWord2 = ColorInt(aColor); + + TUint32 colorWord = colorWord1; + const TInt startShift = (startLong - aX) * KBitsPerPixel; + const TInt finishShift = (KPixelsPerWord - aX - aLength + finishLong) * KBitsPerPixel; + TUint32* base = ScanLine(aY); + TUint32* pixelPtr = base + (startLong / KPixelsPerWord); + TUint32* pixelPtrLimit = base + (finishLong / KPixelsPerWord); + + if (finishLong < startLong) + { + const TUint32 mask = (0xffffffff >> finishShift) & (0xffffffff << (32 - startShift)); + colorWord &= mask; + colorWord1 &= mask; + colorWord2 &= mask; + + for (; aY < yLimit; aY++) + { + pixelPtrLimit[0] |= colorWord; + + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + return; + } + + const TBool extra = (finishLong < aX + aLength); + + for (; aY < yLimit; aY++) + { + if (startShift > 0) + pixelPtr[-1] |= PasteInt(0,colorWord,startShift); + + for (TUint32* tempPixelPtr = pixelPtr; tempPixelPtr < pixelPtrLimit; tempPixelPtr++) + tempPixelPtr[0] |= colorWord; + + if (extra) + pixelPtrLimit[0] |= PasteInt(colorWord,0,finishShift); + + pixelPtr += iScanLineWords; + pixelPtrLimit += iScanLineWords; + colorWord = (colorWord == colorWord2) ? colorWord1 : colorWord2; + } + } + +void CDrawTwoBppBitmap::WriteRgbAlphaMulti(TInt aX,TInt aY,TInt aLength,TRgb aColor,const TUint8* aMaskBuffer) + { + DeOrientate(aX,aY); + TUint8* pixelPtr = REINTERPRET_CAST(TUint8*,ScanLine(aY)) + (aX / 4); + TInt pixelOffset = (aX & 3) * 2; + const TUint8* maskBufferPtrLimit = aMaskBuffer + aLength; + + if (iShadowMode) + Shadow(aColor); + + const TInt gray = aColor._Gray256(); + TRgb pixelColor; + + while (aMaskBuffer < maskBufferPtrLimit) + { + const TInt pixelGray256Value = ((pixelPtr[0] >> pixelOffset) & 3) * 85; + pixelColor = TRgb::_Gray256(((gray * aMaskBuffer[0]) + ((255 - aMaskBuffer[0]) * pixelGray256Value)) / 255); + pixelPtr[0] &= ~(3 << pixelOffset); + pixelPtr[0] |= pixelColor._Gray4() << pixelOffset; + + pixelOffset += 2; + if (pixelOffset >= 8) + { + pixelPtr++; + pixelOffset = 0; + } + aMaskBuffer++; + } + } + +void CDrawTwoBppBitmap::MapColorToUserDisplayMode(TRgb& aColor) + { + if (iUserDispMode == EGray2) + aColor = TRgb::_Gray2(aColor._Gray2()); + } + +void CDrawTwoBppBitmap::MapBufferToUserDisplayMode(TInt aLength,TUint32* aBuffer) + { + if (iUserDispMode == EGray2) + { + TUint8* bufferPtr = (TUint8*)aBuffer; + const TUint8* bufferLimit = bufferPtr + ((aLength + 3) / 4); + + while (bufferPtr < bufferLimit) + { + TUint8 value = TUint8(*bufferPtr & 0xaa); + *bufferPtr++ = TUint8(value | (value >> 1)); + } + } + } + +TInt CDrawTwoBppBitmap::WriteRgbOutlineAndShadow(TInt aX, TInt aY, const TInt aLength, + TUint32 aOutlinePenColor, TUint32 aShadowColor, + TUint32 aFillColor, const TUint8* aDataBuffer) + { + //This is non-optimised since this screen mode is rarely used and is usually + //fast enough without optimisation. + DeOrientate(aX,aY); + TUint8* pixelPtr = REINTERPRET_CAST(TUint8*,ScanLine(aY)) + (aX / 4); + TInt pixelOffset = (aX & 3) * 2; + const TUint8* dataBufferPtrLimit = aDataBuffer + aLength; + + TInt blendedRedColor; + TInt blendedGreenColor; + TInt blendedBlueColor; + TUint8 index = 0; + TRgb finalColor; + + TRgb outlinePenColor; + outlinePenColor.SetInternal(aOutlinePenColor); + TRgb shadowColor; + shadowColor.SetInternal(aShadowColor); + TRgb fillColor; + fillColor.SetInternal(aFillColor); + + const TInt redOutlinePenColor = outlinePenColor.Red(); + const TInt redShadowColor = shadowColor.Red(); + const TInt redFillColor = fillColor.Red(); + + const TInt greenOutlinePenColor = outlinePenColor.Green(); + const TInt greenShadowColor = shadowColor.Green(); + const TInt greenFillColor = fillColor.Green(); + + const TInt blueOutlinePenColor = outlinePenColor.Blue(); + const TInt blueShadowColor = shadowColor.Blue(); + const TInt blueFillColor = fillColor.Blue(); + + while (aDataBuffer < dataBufferPtrLimit) + { + index = *aDataBuffer++; + if (255 == FourColorBlendLookup[index][KBackgroundColorIndex]) + { + //background colour + //No drawing required so move on to next pixel. + pixelOffset += 2; + if (pixelOffset >= 8) + { + pixelPtr++; + pixelOffset = 0; + } + continue; + } + else if (255 == FourColorBlendLookup[index][KFillColorIndex]) + { + //fill colour + finalColor.SetInternal(aFillColor); + } + else if (255 == FourColorBlendLookup[index][KShadowColorIndex]) + { + //Shadow colour + finalColor.SetInternal(aShadowColor); + } + else if (255 == FourColorBlendLookup[index][KOutlineColorIndex]) + { + //Outline colour + finalColor.SetInternal(aOutlinePenColor); + } + else + { + TRgb backgroundColor = TRgb::_Gray4((pixelPtr[0] >> pixelOffset) & 3); + blendedRedColor = (redOutlinePenColor * FourColorBlendLookup[index][KOutlineColorIndex] + + redShadowColor * FourColorBlendLookup[index][KShadowColorIndex] + + redFillColor * FourColorBlendLookup[index][KFillColorIndex] + + backgroundColor.Red() * FourColorBlendLookup[index][KBackgroundColorIndex]) >> 8; + + blendedGreenColor = (greenOutlinePenColor * FourColorBlendLookup[index][KOutlineColorIndex] + + greenShadowColor * FourColorBlendLookup[index][KShadowColorIndex] + + greenFillColor * FourColorBlendLookup[index][KFillColorIndex] + + backgroundColor.Green() * FourColorBlendLookup[index][KBackgroundColorIndex]) >> 8; + + blendedBlueColor = (blueOutlinePenColor * FourColorBlendLookup[index][KOutlineColorIndex] + + blueShadowColor * FourColorBlendLookup[index][KShadowColorIndex] + + blueFillColor * FourColorBlendLookup[index][KFillColorIndex] + + backgroundColor.Blue() * FourColorBlendLookup[index][KBackgroundColorIndex]) >> 8; + + finalColor = TRgb(blendedRedColor, blendedGreenColor, blendedBlueColor); + } + + //Clear the relevant bits. + pixelPtr[0] &= ~(3 << pixelOffset); + pixelPtr[0] |= (finalColor._Gray4() << pixelOffset); + pixelOffset += 2; + + if (pixelOffset >= 8) + { + pixelPtr++; + pixelOffset = 0; + } + } + return KErrNone; + }