--- /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;
+ }