1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // This module implemente the class use for a 8 bpp color screen.

    15 // Include files                                                   

    16 // 

    17 //

    18 

    19 /**

    20  @file

    21 */

    22 /********************************************************************/

    23 #include <bitdraw.h>

    24 #include "scdraw.h"

    25 #include <hal.h>

    26 

    27 /********************************************************************/

    28 /*  Implementation of CDrawEightBppScreenBitmapColor class          */

    29 /********************************************************************/

    30 void CDrawEightBppScreenBitmapColor::SetSize(const TSize& aSize) 

    31 	{

    32 	CDrawBitmap::SetSize(aSize);

    33 	__ASSERT_DEBUG(iSize == aSize, User::Invariant());

    34 	iLongWidth = CDrawBitmap::iScanLineWords * 4;

    35 	}

    36 void CDrawEightBppScreenBitmapColor::SetDisplayMode(CFbsDrawDevice* aDrawDevice)

    37 	{

    38 	CopyOldSettings(aDrawDevice) ;

    39 	InitScreen() ;

    40 	}

    41 

    42 TInt CDrawEightBppScreenBitmapColor::HorzTwipsPerThousandPixels() const

    43 	{

    44 	if (iSize.iWidth == 0)

    45 		return 0 ;

    46 	TMachineInfoV1Buf miBuf ;

    47 	UserHal::MachineInfo(miBuf) ;

    48 	return miBuf().iPhysicalScreenSize.iWidth * 1000 / iSize.iWidth ;

    49 	}

    50 

    51 TInt CDrawEightBppScreenBitmapColor::VertTwipsPerThousandPixels() const

    52 	{

    53 	if (iSize.iHeight == 0)

    54 		return 0 ;

    55 

    56 	TMachineInfoV1Buf miBuf ;

    57 	UserHal::MachineInfo(miBuf) ;

    58 	return miBuf().iPhysicalScreenSize.iHeight * 1000 / iSize.iHeight ;

    59 	}

    60 	

    61 /**

    62 Initialises the palette

    63 */

    64 TInt CDrawEightBppScreenBitmapColor::InitScreen()

    65 	{

    66 

    67 	__ASSERT_ALWAYS(iPaletteAddress!=NULL, Panic(EScreenDriverPanicNullPointer)) ;

    68 

    69 	/* Fill the palette to support 8 Bpp color */

    70 	TUint16* palettePtr = iPaletteAddress ;

    71 	for (TInt count = 0; count < KEightBppPaletteEntries; count++)

    72 		*palettePtr++ = TRgb::Color256(count)._Color4K() | KEightBppPixelBitSize ;

    73 

    74 	return KErrNone ;

    75 	}

    76 

    77 /**

    78 Constructs the CDrawEightBppScreenBitmapColor object.

    79 @param aScreenNo Screen number. It will be used in HAL::Get() calls.

    80 @param aBitmapAddress The screen memory address.

    81 @param aSize Screen size

    82 @return System-wide error codes, KErrNone if the construction was successfull.

    83 */

    84 TInt CDrawEightBppScreenBitmapColor::ConstructScreenL(TInt aScreenNo, TAny* aBitmapAddress, TSize aSize)

    85 	{

    86 	iScreenNo = aScreenNo;

    87 	TInt displayMode;

    88 

    89 	TInt ret = HAL::Get(aScreenNo, HALData::EDisplayMode, displayMode);

    90 	if (ret != KErrNone)

    91 		return ret;

    92 

    93 	TInt linepitchInBytes = displayMode;

    94 	ret = HAL::Get(aScreenNo,HALData::EDisplayOffsetBetweenLines,linepitchInBytes);

    95 	if (ret != KErrNone)

    96 		return ret;

    97 

    98 	CDrawBitmap::iScanLineWords = linepitchInBytes / 4;

    99 	ret = CDrawEightBppBitmapColor::Construct(aSize);

   100 	if (ret != KErrNone)

   101 		return ret ;

   102 

   103 	/* Set the pointer on the first palette entry */

   104 	iPaletteAddress = (TUint16*)aBitmapAddress ;

   105 	

   106 	TInt offsetToFirstPixel = displayMode;

   107 	ret = HAL::Get(aScreenNo,HALData::EDisplayOffsetToFirstPixel, offsetToFirstPixel);

   108 	if (ret != KErrNone)

   109 		return ret;

   110 	iBits = (TUint32*)((TUint32)aBitmapAddress + offsetToFirstPixel);

   111 

   112 	return KErrNone ;

   113 	}

   114 

   115 void CDrawEightBppScreenBitmapColor::OrientationsAvailable(TBool aOrientation[4])

   116 	{

   117 	aOrientation[EOrientationNormal]     = ETrue ;

   118 	aOrientation[EOrientationRotated90]  = ETrue ;

   119 	aOrientation[EOrientationRotated180] = ETrue ;

   120 	aOrientation[EOrientationRotated270] = ETrue ;

   121 	}

   122 

   123 TBool CDrawEightBppScreenBitmapColor::SetOrientation(TOrientation aOrientation)

   124 	{

   125 	iOrientation = aOrientation ;

   126 	return ETrue ;

   127 	}

   128 

   129 TInt CDrawEightBppScreenBitmapColor::SetCustomPalette(const CPalette* aPalette)

   130 	{

   131 	TInt ret = CDrawEightBppBitmapColor::SetCustomPalette(aPalette) ;

   132 

   133 	if (ret == KErrNone)

   134 		{

   135 		TInt index = 0 ;

   136 		TUint16* palettePtr = iPaletteAddress ;

   137 		const TUint16* const palettePtrLimit = iPaletteAddress + KEightBppPaletteEntries ;

   138 

   139 		*palettePtr++ = IndexToColor(index++)._Color4K() | KEightBppPixelBitSize ;

   140 

   141 		while (palettePtr < palettePtrLimit)

   142 			*palettePtr++ = IndexToColor(index++)._Color4K() ;

   143 		}

   144 	return ret ;

   145 	}