/*

* Copyright (c) 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 <e32base.h>

#include "AknExtendedFaderGfx.h"

void TAknExtendedFaderGfx::FadeRect_GrayColorize_16MX(TUint32* aPixels, TUint32 aStrideInPixels, TInt x1, TInt y1, TInt x2, TInt y2, const TInt aFadeMapFactor, const TInt aFadeMapOffset, const TUint32 aROverlay, const TUint32 aGOverlay, const TUint32 aBOverlay)

	{	

	// Width and height of the rectangle

	TUint32 width = x2-x1;

	TUint32 height = y2-y1;

	// Get pointer to first pixel

	register TUint32* data = aPixels + x1 + aStrideInPixels*y1;

	// Padding is the amount of bytes we need to skip after single scanline to reach the beginning of the next one

	TUint32 padding = (aStrideInPixels - width)<<2;

	// Align address to 32-byte boundary

	TUint32 leftwidth, middlewidth, rightwidth;	

	AlignTo32Bytes(data, width, leftwidth, middlewidth, rightwidth);

	// 8 pixels at a time in the midsection

	middlewidth>>=3;

	// Shift offset so we can remove one shift operation for each pixel

	const TUint32 shiftedFadeMapOffset = aFadeMapOffset << 18;

	// Constants for greyscale conversion

	const TUint32 KRBCoef(0x0144007C); // Coefficients for R & B: 324, 124 (/ 1024)

	const TUint32 KGCoef(0x00000240);  // Coefficient for G: 576

	TUint32 rbOverlay = (aROverlay << 16) | aBOverlay; // Combine R & B overlays to do two calculations at once

	FadeAlignedRect_GrayColorize_16MX(data, height, KRBCoef, KGCoef, aFadeMapFactor, shiftedFadeMapOffset, rbOverlay, aGOverlay, leftwidth, middlewidth, rightwidth, padding);

	}

void TAknExtendedFaderGfx::FadeRect_GrayColorize_64K(TUint16* aPixels, TUint32 aStrideInPixels, TInt x1, TInt y1, TInt x2, TInt y2, const TInt aFadeMapFactor, const TInt aFadeMapOffset, const TUint32 aROverlay, const TUint32 aGOverlay, const TUint32 aBOverlay)

	{	

	// Width and height of the rectangle

	TUint32 width = x2-x1;

	TUint32 height = y2-y1;

	// Get pointer to first pixel

	register TUint16* data = aPixels + x1 + aStrideInPixels*y1;

	// Padding is the amount of pixels we need to skip after single scanline to reach the beginning of the next one

	TUint32 padding = aStrideInPixels - width;

	// Helper variables

	register TInt x;

	while(height--)

		{

		x = width;

		while(x--)

			{

			// Process pixels

			*data++ = PixelToGrayscaleWithFade_64K((TUint32)*data, aFadeMapFactor, aFadeMapOffset, aROverlay, aGOverlay, aBOverlay);

			}

		data+=padding;

		}

	}