diff -r 000000000000 -r 5d03bc08d59c graphicsdeviceinterface/screendriver/sbit/BMDRAW8M.CPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsdeviceinterface/screendriver/sbit/BMDRAW8M.CPP	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,388 @@
+// 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"
+
+// CDrawEightBppBitmapGray
+
+TInt CDrawEightBppBitmapGray::Construct(TSize aSize)
+	{
+	return Construct(aSize, (aSize.iWidth + 3) & ~3);
+	}
+
+TInt CDrawEightBppBitmapGray::Construct(TSize aSize, TInt aStride)
+	{
+	iDispMode = EGray256;
+	return CDrawEightBppBitmapCommon::Construct(aSize, aStride);
+	}
+
+void CDrawEightBppBitmapGray::Shadow(TRgb& aColor)
+	{
+	if (iShadowMode & EFade)
+		aColor = TRgb::_Gray256(FadeGray(aColor._Gray256()));
+
+	if (iShadowMode & EShadow)
+		{
+		TInt gray256 = Max(aColor._Gray256() - 85,0);
+		aColor = TRgb::_Gray256(gray256);
+		}
+	}
+
+TUint8 CDrawEightBppBitmapGray::ShadowAndFade(TInt aGray256)
+	{
+	if (iShadowMode & EFade)
+		aGray256 = FadeGray(aGray256);
+
+	if (iShadowMode & EShadow)
+		aGray256 = Max(aGray256 - 85,0);
+
+	return TUint8(aGray256);
+	}
+
+TRgb CDrawEightBppBitmapGray::ReadRgbNormal(TInt aX,TInt aY) const
+	{
+	return TRgb::_Gray256(*PixelAddress(aX,aY));
+	}
+
+void CDrawEightBppBitmapGray::ShadowArea(const TRect& aRect)
+	{
+	const TRect rect(DeOrientate(aRect));
+
+	__ASSERT_DEBUG(rect.iTl.iX>=0 && rect.iBr.iX<=iSize.iWidth,Panic(EScreenDriverPanicOutOfBounds));
+	__ASSERT_DEBUG(rect.iTl.iY>=0 && rect.iBr.iY<=iSize.iHeight,Panic(EScreenDriverPanicOutOfBounds));
+
+	const TInt longWidth = iLongWidth;
+	TUint8* pixelPtr = PixelAddress(rect.iTl.iX,rect.iTl.iY);
+	const TUint8* pixelRowPtrLimit = pixelPtr + (rect.Height() * longWidth);
+
+	if (iShadowMode & EFade)
+		{
+		TUint8* pixelRowPtr = pixelPtr;
+		TUint8* pixelPtrLimit = pixelPtr + rect.Width();
+
+		while (pixelRowPtr < pixelRowPtrLimit)
+			{
+			TUint8* tempPixelPtr = pixelRowPtr;
+
+			while (tempPixelPtr < pixelPtrLimit)
+				{
+				*tempPixelPtr = FadeGray(*tempPixelPtr);
+				++tempPixelPtr;
+				}
+
+			pixelRowPtr += longWidth;
+			pixelPtrLimit += longWidth;
+			}
+		}
+
+	if (iShadowMode & EShadow)
+		{
+		TUint8* pixelRowPtr = pixelPtr;
+		TUint8* pixelPtrLimit = pixelPtr + rect.Width();
+
+		while (pixelRowPtr < pixelRowPtrLimit)
+			{
+			TUint8* tempPixelPtr = pixelRowPtr;
+
+			while (tempPixelPtr < pixelPtrLimit)
+				{
+				*tempPixelPtr = TUint8(Max(*tempPixelPtr - 85,0));
+				++tempPixelPtr;
+				}
+
+			pixelRowPtr += longWidth;
+			pixelPtrLimit += longWidth;
+			}
+		}
+	}
+
+void CDrawEightBppBitmapGray::ShadowBuffer(TInt aLength,TUint32* aBuffer)
+	{
+	__ASSERT_DEBUG(aLength>0,Panic(EScreenDriverPanicInvalidParameter));
+	__ASSERT_DEBUG(aBuffer!=NULL,Panic(EScreenDriverPanicInvalidParameter));
+
+	TUint8* limit = ((TUint8*)aBuffer) + aLength;
+
+	if (iShadowMode & EFade)
+		{
+		TUint8* buffer = (TUint8*)aBuffer;
+
+		while(buffer < limit)
+			{
+			*buffer = FadeGray(*buffer);
+			++buffer;
+			}
+		}
+
+	if (iShadowMode & EShadow)
+		{
+		TUint8* buffer = (TUint8*)aBuffer;
+
+		while(buffer < limit)
+			{
+			*buffer = TUint8(Max(*buffer - 85,0));
+			++buffer;
+			}
+		}
+	}
+
+void CDrawEightBppBitmapGray::WriteRgb(TInt aX,TInt aY,TRgb aColor)
+	{
+	CDrawEightBppBitmapCommon::WriteRgb(aX,aY,TUint8(aColor._Gray256()));
+	}
+
+void CDrawEightBppBitmapGray::WriteBinary(TInt aX,TInt aY,TUint32* aData,TInt aLength,TInt aHeight,TRgb aColor)
+	{
+	CDrawEightBppBitmapCommon::WriteBinary(aX,aY,aData,aLength,aHeight,TUint8(aColor._Gray256()));
+	}
+
+void CDrawEightBppBitmapGray::WriteBinaryOp(TInt aX,TInt aY,TUint32* aData,TInt aLength,TInt aHeight,TRgb aColor,CGraphicsContext::TDrawMode aDrawMode)
+	{
+	CDrawEightBppBitmapCommon::WriteBinaryOp(aX,aY,aData,aLength,aHeight,TUint8(aColor._Gray256()),aDrawMode);
+	}
+
+void CDrawEightBppBitmapGray::WriteBinaryLineVertical(TInt aX,TInt aY,TUint32* aData,TInt aLength,TRgb aColor,TBool aUp)
+	{
+	CDrawEightBppBitmapCommon::WriteBinaryLineVertical(aX,aY,aData,aLength,TUint8(aColor._Gray256()),aUp);
+	}
+
+/**
+MAlphaBlend::WriteRgbAlphaLine() implementation.
+@see MAlphaBlend::WriteRgbAlphaLine()
+*/
+void CDrawEightBppBitmapGray::WriteRgbAlphaLine(TInt aX, TInt aY, TInt aLength,
+                                                const TUint8* aRgbBuffer,
+                                                const TUint8* aMaskBuffer,
+                                                MAlphaBlend::TShadowing aShadowing,
+                                                CGraphicsContext::TDrawMode /*aDrawMode*/)
+    {
+	DeOrientate(aX,aY);
+	TUint8* pixelPtr = PixelAddress(aX,aY);
+	const TInt pixelPtrInc = LogicalPixelAddressIncrement();
+	const TUint8* maskBufferPtrLimit = aMaskBuffer + aLength;
+	TRgb pixelClr;
+
+	while (aMaskBuffer < maskBufferPtrLimit)
+		{
+        TRgb srcColor(aRgbBuffer[2],aRgbBuffer[1],aRgbBuffer[0]);
+        if(aShadowing == MAlphaBlend::EShdwBefore)
+            {
+		    Shadow(srcColor);
+            }
+		TInt pixelValue = pixelPtr[0] * (255 - aMaskBuffer[0]);
+		TInt srceValue = (((srcColor.Red() << 1) + 
+                            srcColor.Green() + (srcColor.Green() << 2) + 
+                            srcColor.Blue()) >> 3) * aMaskBuffer[0];
+
+		pixelValue += srceValue;
+		pixelClr =TRgb::_Gray256(pixelValue / 255);
+        if(aShadowing == MAlphaBlend::EShdwAfter)
+            {
+		    Shadow(pixelClr);
+            }
+		MapColorToUserDisplayMode(pixelClr);
+		pixelPtr[0] = TUint8(pixelClr._Gray256());
+
+		pixelPtr += pixelPtrInc;
+		aRgbBuffer += 4;
+		aMaskBuffer++;
+		}
+	}
+
+void CDrawEightBppBitmapGray::WriteRgbMulti(TInt aX,TInt aY,TInt aLength,TInt aRows,TRgb aColor)
+	{
+	CDrawEightBppBitmapCommon::WriteRgbMulti(aX,aY,aLength,aRows,TUint8(aColor._Gray256()));
+	}
+
+void CDrawEightBppBitmapGray::WriteRgbMultiXOR(TInt aX,TInt aY,TInt aLength,TInt aRows,TRgb aColor)
+	{
+	CDrawEightBppBitmapCommon::WriteRgbMultiXOR(aX,aY,aLength,aRows,TUint8(aColor._Gray256()));
+	}
+
+void CDrawEightBppBitmapGray::WriteRgbMultiAND(TInt aX,TInt aY,TInt aLength,TInt aRows,TRgb aColor)
+	{
+	CDrawEightBppBitmapCommon::WriteRgbMultiAND(aX,aY,aLength,aRows,TUint8(aColor._Gray256()));
+	}
+
+void CDrawEightBppBitmapGray::WriteRgbMultiOR(TInt aX,TInt aY,TInt aLength,TInt aRows,TRgb aColor)
+	{
+	CDrawEightBppBitmapCommon::WriteRgbMultiOR(aX,aY,aLength,aRows,TUint8(aColor._Gray256()));
+	}
+
+void CDrawEightBppBitmapGray::WriteRgbAlphaMulti(TInt aX,TInt aY,TInt aLength,TRgb aColor,const TUint8* aMaskBuffer)
+	{
+	DeOrientate(aX,aY);
+	TUint8* pixelPtr = PixelAddress(aX,aY);
+	const TInt pixelPtrInc = PixelAddressIncrement();
+	const TUint8* maskBufferPtrLimit = aMaskBuffer + aLength;
+
+	if (iShadowMode)
+		Shadow(aColor);
+	
+	const TInt gray = aColor._Gray256();
+	while (aMaskBuffer < maskBufferPtrLimit)
+		{
+		pixelPtr[0] = TUint8(((gray * aMaskBuffer[0]) + ((255 - aMaskBuffer[0]) * pixelPtr[0])) / 255);
+
+		pixelPtr += pixelPtrInc;
+		aMaskBuffer++;
+		}
+	}
+
+void CDrawEightBppBitmapGray::MapColorToUserDisplayMode(TRgb& aColor)
+	{
+	switch (iUserDispMode)
+		{
+	case EGray2:
+		aColor = TRgb::_Gray2(aColor._Gray2());
+		break;
+	case EGray4:
+	case EColor16:
+		aColor = TRgb::_Gray4(aColor._Gray4());
+		break;
+	case EGray16:
+	case EColor256:
+		aColor = TRgb::_Gray16(aColor._Gray16());
+		break;
+	default:
+		break;
+		}
+	}
+
+void CDrawEightBppBitmapGray::MapBufferToUserDisplayMode(TInt aLength,TUint32* aBuffer)
+	{
+	TUint8* bufferPtr = (TUint8*)aBuffer;
+	const TUint8* bufferLimit = bufferPtr + aLength;
+
+	switch (iUserDispMode)
+		{
+	case EGray2:
+		while (bufferPtr < bufferLimit)
+			{
+			if (*bufferPtr & 0x80)
+				*bufferPtr++ = 0xff;
+			else
+				*bufferPtr++ = 0;
+			}
+		break;
+	case EGray4:
+	case EColor16:
+		while (bufferPtr < bufferLimit)
+			{
+			TUint8 gray4 = TUint8(*bufferPtr >> 6);
+			gray4 |= (gray4 << 2);
+			*bufferPtr++ = TUint8(gray4 | (gray4 << 4));
+			}
+		break;
+	case EGray16:
+	case EColor256:
+		while (bufferPtr < bufferLimit)
+			{
+			TUint8 gray16 = TUint8(*bufferPtr >> 4);
+			*bufferPtr++ = TUint8(gray16 | (gray16 << 4));
+			}
+		break;
+	default:
+		break;
+		}
+	}
+
+TInt CDrawEightBppBitmapGray::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 = PixelAddress(aX,aY);
+	const TInt pixelPtrInc = LogicalPixelAddressIncrement();
+	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.
+			pixelPtr += pixelPtrInc;
+			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::_Gray256(*pixelPtr);
+	
+			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);
+			}
+
+		*pixelPtr = TUint8(finalColor._Gray256());
+		pixelPtr += pixelPtrInc;
+		}
+	return KErrNone;
+	}