sl@0: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // This module implemente the class use for a 8 bpp color screen.
sl@0: // Include files                                                   
sl@0: // 
sl@0: //
sl@0: 
sl@0: /**
sl@0:  @file
sl@0: */
sl@0: /********************************************************************/
sl@0: #include <bitdraw.h>
sl@0: #include "scdraw.h"
sl@0: #include <hal.h>
sl@0: 
sl@0: /********************************************************************/
sl@0: /*  Implementation of CDrawEightBppScreenBitmapColor class          */
sl@0: /********************************************************************/
sl@0: void CDrawEightBppScreenBitmapColor::SetSize(const TSize& aSize) 
sl@0: 	{
sl@0: 	CDrawBitmap::SetSize(aSize);
sl@0: 	__ASSERT_DEBUG(iSize == aSize, User::Invariant());
sl@0: 	iLongWidth = CDrawBitmap::iScanLineWords * 4;
sl@0: 	}
sl@0: void CDrawEightBppScreenBitmapColor::SetDisplayMode(CFbsDrawDevice* aDrawDevice)
sl@0: 	{
sl@0: 	CopyOldSettings(aDrawDevice) ;
sl@0: 	InitScreen() ;
sl@0: 	}
sl@0: 
sl@0: TInt CDrawEightBppScreenBitmapColor::HorzTwipsPerThousandPixels() const
sl@0: 	{
sl@0: 	if (iSize.iWidth == 0)
sl@0: 		return 0 ;
sl@0: 	TMachineInfoV1Buf miBuf ;
sl@0: 	UserHal::MachineInfo(miBuf) ;
sl@0: 	return miBuf().iPhysicalScreenSize.iWidth * 1000 / iSize.iWidth ;
sl@0: 	}
sl@0: 
sl@0: TInt CDrawEightBppScreenBitmapColor::VertTwipsPerThousandPixels() const
sl@0: 	{
sl@0: 	if (iSize.iHeight == 0)
sl@0: 		return 0 ;
sl@0: 
sl@0: 	TMachineInfoV1Buf miBuf ;
sl@0: 	UserHal::MachineInfo(miBuf) ;
sl@0: 	return miBuf().iPhysicalScreenSize.iHeight * 1000 / iSize.iHeight ;
sl@0: 	}
sl@0: 	
sl@0: /**
sl@0: Initialises the palette
sl@0: */
sl@0: TInt CDrawEightBppScreenBitmapColor::InitScreen()
sl@0: 	{
sl@0: 
sl@0: 	__ASSERT_ALWAYS(iPaletteAddress!=NULL, Panic(EScreenDriverPanicNullPointer)) ;
sl@0: 
sl@0: 	/* Fill the palette to support 8 Bpp color */
sl@0: 	TUint16* palettePtr = iPaletteAddress ;
sl@0: 	for (TInt count = 0; count < KEightBppPaletteEntries; count++)
sl@0: 		*palettePtr++ = TRgb::Color256(count)._Color4K() | KEightBppPixelBitSize ;
sl@0: 
sl@0: 	return KErrNone ;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Constructs the CDrawEightBppScreenBitmapColor object.
sl@0: @param aScreenNo Screen number. It will be used in HAL::Get() calls.
sl@0: @param aBitmapAddress The screen memory address.
sl@0: @param aSize Screen size
sl@0: @return System-wide error codes, KErrNone if the construction was successfull.
sl@0: */
sl@0: TInt CDrawEightBppScreenBitmapColor::ConstructScreenL(TInt aScreenNo, TAny* aBitmapAddress, TSize aSize)
sl@0: 	{
sl@0: 	iScreenNo = aScreenNo;
sl@0: 	TInt displayMode;
sl@0: 
sl@0: 	TInt ret = HAL::Get(aScreenNo, HALData::EDisplayMode, displayMode);
sl@0: 	if (ret != KErrNone)
sl@0: 		return ret;
sl@0: 
sl@0: 	TInt linepitchInBytes = displayMode;
sl@0: 	ret = HAL::Get(aScreenNo,HALData::EDisplayOffsetBetweenLines,linepitchInBytes);
sl@0: 	if (ret != KErrNone)
sl@0: 		return ret;
sl@0: 
sl@0: 	CDrawBitmap::iScanLineWords = linepitchInBytes / 4;
sl@0: 	ret = CDrawEightBppBitmapColor::Construct(aSize);
sl@0: 	if (ret != KErrNone)
sl@0: 		return ret ;
sl@0: 
sl@0: 	/* Set the pointer on the first palette entry */
sl@0: 	iPaletteAddress = (TUint16*)aBitmapAddress ;
sl@0: 	
sl@0: 	TInt offsetToFirstPixel = displayMode;
sl@0: 	ret = HAL::Get(aScreenNo,HALData::EDisplayOffsetToFirstPixel, offsetToFirstPixel);
sl@0: 	if (ret != KErrNone)
sl@0: 		return ret;
sl@0: 	iBits = (TUint32*)((TUint32)aBitmapAddress + offsetToFirstPixel);
sl@0: 
sl@0: 	return KErrNone ;
sl@0: 	}
sl@0: 
sl@0: void CDrawEightBppScreenBitmapColor::OrientationsAvailable(TBool aOrientation[4])
sl@0: 	{
sl@0: 	aOrientation[EOrientationNormal]     = ETrue ;
sl@0: 	aOrientation[EOrientationRotated90]  = ETrue ;
sl@0: 	aOrientation[EOrientationRotated180] = ETrue ;
sl@0: 	aOrientation[EOrientationRotated270] = ETrue ;
sl@0: 	}
sl@0: 
sl@0: TBool CDrawEightBppScreenBitmapColor::SetOrientation(TOrientation aOrientation)
sl@0: 	{
sl@0: 	iOrientation = aOrientation ;
sl@0: 	return ETrue ;
sl@0: 	}
sl@0: 
sl@0: TInt CDrawEightBppScreenBitmapColor::SetCustomPalette(const CPalette* aPalette)
sl@0: 	{
sl@0: 	TInt ret = CDrawEightBppBitmapColor::SetCustomPalette(aPalette) ;
sl@0: 
sl@0: 	if (ret == KErrNone)
sl@0: 		{
sl@0: 		TInt index = 0 ;
sl@0: 		TUint16* palettePtr = iPaletteAddress ;
sl@0: 		const TUint16* const palettePtrLimit = iPaletteAddress + KEightBppPaletteEntries ;
sl@0: 
sl@0: 		*palettePtr++ = IndexToColor(index++)._Color4K() | KEightBppPixelBitSize ;
sl@0: 
sl@0: 		while (palettePtr < palettePtrLimit)
sl@0: 			*palettePtr++ = IndexToColor(index++)._Color4K() ;
sl@0: 		}
sl@0: 	return ret ;
sl@0: 	}