/*

* Copyright (c) 2007 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:  Active Palette Checkerboard Styler*

*/

/**

 * @file ActivePalette2CheckerboardStyler.cpp

 * Active Palette Checkerboard Styler

 */

#include "ActivePalette2Logger.h"

#include "ActivePalette2CheckerboardStyler.h"

#include "ActivePalette2Cfg.h"

#include "ActivePalette2Utils.h"

#include <activepalette2graphics.mbg>

#include <bitstd.h>

#include <gdi.h>

#include <AknIconUtils.h>

/// Returns whether supplied number is odd

#define IS_ODD(num) ((num) & 1)

// Lightness threshold for checking whether a pixel

// should be considered 'white'. Lightness is defined as the sum of the

// 8-bit red, green, and blue values.

const TInt KLightnessThreshold = 0x80 * 3;

// Threshold for determining if a pixel in a soft mask is considered

// opaque or transparent.

const TUint8 KMaskThreshold = 0x7f;

// Color value for transparent pixel (ARGB format).

const TUint32 KColorKey = 0xFF000000;

// Color value for opaque pixel (ARGB format).

const TUint32 KOpaqueColor = 0x00FFFFFF;

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::NewL()

// -----------------------------------------------------------------------------

//

CActivePalette2CheckerboardStyler* CActivePalette2CheckerboardStyler::NewL()

    {

	CActivePalette2CheckerboardStyler* self = new (ELeave) CActivePalette2CheckerboardStyler();

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(); // this

	return self;

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::ConstructL()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::ConstructL()

    {

	LOGTEXT( _L( "CActivePalette2CheckerboardStyler::ConstructL entered"));

    CActivePalette2Styler::ConstructL();

	iAPTopSectionMask	    = new (ELeave) CFbsBitmap;

	iAPItemMaskA            = new (ELeave) CFbsBitmap;

	iAPItemMaskB            = new (ELeave) CFbsBitmap;

	iAPGapMaskA	            = new (ELeave) CFbsBitmap;

	iAPGapMaskB	            = new (ELeave) CFbsBitmap;

	iAPBottomSectionMaskA   = new (ELeave) CFbsBitmap;

	iAPBottomSectionMaskB   = new (ELeave) CFbsBitmap;

    // The order of calling these has an importance, to create the checkers correctly

    LoadAndScaleCheckerboardL( iAPTopSectionMask, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_top, EMbmActivepalette2graphicsQgn_graf_cam4_tb_top_mask, 

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::ETopSectionHeight) ) );

    LoadAndScaleCheckerboardL( iAPItemMaskA, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body_mask, 

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemHeight) ) );

    LoadAndScaleCheckerboardL( iAPGapMaskA, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap_mask, 

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EGapBetweenItems) ) );

    LoadAndScaleCheckerboardL( iAPItemMaskB, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body_mask,

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemHeight) ) );

    LoadAndScaleCheckerboardL( iAPGapMaskB, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap_mask, 

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EGapBetweenItems) ) );

    LoadAndScaleCheckerboardL( iAPBottomSectionMaskB, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom_mask,

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EBottomSectionHeight) ) );

    LoadAndScaleCheckerboardL( iAPBottomSectionMaskA, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom_mask,

            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EBottomSectionHeight) ) );

	LOGTEXT( _L( "CActivePalette2CheckerboardStyler::ConstructL Left"));

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::~CActivePalette2CheckerboardStyler()

// -----------------------------------------------------------------------------

//

CActivePalette2CheckerboardStyler::~CActivePalette2CheckerboardStyler()

    {

	delete iAPTopSectionMask;

	delete iAPItemMaskA;

	delete iAPItemMaskB;

	delete iAPGapMaskA;

	delete iAPGapMaskB;

	delete iAPBottomSectionMaskA;

	delete iAPBottomSectionMaskB;

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::DrawItem()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::DrawItem(TInt aScreenPos, CFbsBitmap* aIcon, CFbsBitmap* aMask, TInt aOffsetFrame, TInt aOffsetTotal)

    {

    TRect area(ItemRect(aScreenPos, aOffsetFrame, aOffsetTotal));

    iDrawBufContext->SetClippingRect(iItemsRect);

    iDrawBufMaskContext->SetClippingRect(iItemsRect);

    if ( IS_ODD(aScreenPos) )

        {  

        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPItem, iAPItemMaskB, EFalse, EFalse);

        }

    else

        {

        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPItem, iAPItemMaskA, EFalse, EFalse);

        }

	BlitGraphic(area.iTl + TPoint(ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemXOffset),0), iDrawBufContext, iDrawBufMaskContext, aIcon, aMask, ETrue, ETrue);

    iDrawBufMaskContext->CancelClippingRect();

    iDrawBufContext->CancelClippingRect();

    area.Intersection(iItemsRect);

    AddToDirtyRect(	area );

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::DrawGap()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::DrawGap(TInt aScreenPos, TInt aOffsetFrame, TInt aOffsetTotal)

    {

    TRect area(GapRect(aScreenPos, aOffsetFrame, aOffsetTotal));

    iDrawBufContext->SetClippingRect(iItemsRect);

    iDrawBufMaskContext->SetClippingRect(iItemsRect);

    if ( IS_ODD(aScreenPos) )

        {  

        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPGap, iAPGapMaskB, EFalse, EFalse);

        }

    else

        {  

        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPGap, iAPGapMaskA, EFalse, EFalse);

        }

    iDrawBufMaskContext->CancelClippingRect();

    iDrawBufContext->CancelClippingRect();

    area.Intersection(iItemsRect);

    AddToDirtyRect(	area );

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::AnimItem()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::AnimItem(TInt aScreenPos, CFbsBitmap* aIcon, CFbsBitmap* aMask)

    {

    TRect area(ItemRect(aScreenPos));

    area.iTl.iX = ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemXOffset);

    area.SetWidth(ActivePalette2Utils::APDimension( ActivePalette2Utils::EItemWidth ));

    TRect clippingRect(TPoint(ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemXOffset), 0), ActivePalette2Utils::APDimensionSize( ActivePalette2Utils::EItemSize ) );

    iDrawBufContext->BitBlt(area.iTl, iAPItem, clippingRect);

    if ( IS_ODD(aScreenPos) )

        {  

        iDrawBufMaskContext->BitBlt(area.iTl, iAPItemMaskB, clippingRect);

        }

    else

        {

        iDrawBufMaskContext->BitBlt(area.iTl, iAPItemMaskA, clippingRect);

        }

	BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, aIcon, aMask, ETrue, ETrue);

    AddToDirtyRect(	area );

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::DrawTopScrollArrowSection()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::DrawTopScrollArrowSection(TBool aShowArrow)

    {

    TRect area(TopSectionRect());

    BlitGraphic(TPoint(0,0), iDrawBufContext, iDrawBufMaskContext, iAPTopSection, iAPTopSectionMask, EFalse, EFalse);

    if ( aShowArrow )

        {

        CentreGraphic(area, iDrawBufContext, iDrawBufMaskContext, iScrollUpIcon, iScrollUpIconMask, ETrue, ETrue);

        }

    AddToDirtyRect(	area );

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::DrawBottomScrollArrowSection()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::DrawBottomScrollArrowSection(TBool aShowArrow)

    {

    TRect area(BottomSectionRect());

    if ( IS_ODD(iNumItems) )

        {  

        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPBottomSection, iAPBottomSectionMaskA, EFalse, EFalse);

        }

    else

        {

        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPBottomSection, iAPBottomSectionMaskB, EFalse, EFalse);

        }

    if ( aShowArrow )

        {

        CentreGraphic(area, iDrawBufContext, iDrawBufMaskContext, iScrollDownIcon, iScrollDownIconMask, ETrue, ETrue);

        }

    AddToDirtyRect(	area );

    }

// -----------------------------------------------------------------------------

// CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard()

// -----------------------------------------------------------------------------

//

void CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboardL(

                                                CFbsBitmap* aTargetBitmap,

                                                const TDesC& aFileName,

                                                TInt32 aId,

                                                TInt32 aMaskId,

                                                TSize aSize )

    {

    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard entered"));

    CFbsBitmap* sourceIcon = NULL;

    CFbsBitmap* sourceIconMask = NULL;

    AknIconUtils::CreateIconLC(sourceIcon, sourceIconMask, aFileName, aId, aMaskId);

    AknIconUtils::SetSize(sourceIcon, aSize);

    AknIconUtils::SetSize(sourceIconMask, aSize);

    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard svg icons loaded"));

    User::LeaveIfError( aTargetBitmap->Create( aSize, EColor16MA ) );

    TSize bmpSize = aTargetBitmap->SizeInPixels();

    TRgb rgbColor = KRgbBlack;

    TRgb rgbAlphaColor = KRgbBlack;

    HBufC8* lineBuf = HBufC8::NewLC( CFbsBitmap::ScanLineLength( bmpSize.iWidth, EColor16MA ) );

    TPtr8 lineDes = lineBuf->Des();

    HBufC8* maskBuf = HBufC8::NewLC( CFbsBitmap::ScanLineLength( bmpSize.iWidth, EGray256 ) );

    TPtr8 maskDes = maskBuf->Des();

    for (TInt y = 0; y < bmpSize.iHeight; y++)

        {

        sourceIcon->GetScanLine(

                lineDes, TPoint(0, y), bmpSize.iWidth, EColor16MA);

        sourceIconMask->GetScanLine(

                maskDes, TPoint(0, y), bmpSize.iWidth, EGray256);

        // EColor16MA is 4 bytes (32-bits) per pixel

        TUint32* linePtr = reinterpret_cast<TUint32*>( &lineDes[0] );

        // EGray256 is 1 byte per pixel

        TUint8* maskPtr = reinterpret_cast<TUint8*>( &maskDes[0] );

        for( TInt x = 0; x < bmpSize.iWidth; x++ )

            {

            TUint32 color = linePtr[x];

            TUint8 mask = maskPtr[x];

            // Get the RGB values in order to check the lightness of the pixel

            // to determine whether to mask with the checkerboard pattern.

            TInt lightness =

                (color & 0xFF) +         // blue

                ((color >> 8) & 0xFF) +  // green

                ((color >> 16) & 0xFF);  // red

            if ( mask < KMaskThreshold )

                {

                // Transparent area.

                linePtr[x] = KColorKey;

                }

            else if ( lightness > KLightnessThreshold )

                {

                // Semitransparent (dithered) area.

                // Make every second pixel transparent.

                if ( ( x + iLineCheckerCounter ) & 1 )

                    {

                    linePtr[x] = KColorKey;

                    }

                else

                    {

                    linePtr[x] = KOpaqueColor;

                    }

                }

            else

                {

                // Fully opaque area

                linePtr[x] = KOpaqueColor;

                }

            }

        aTargetBitmap->SetScanLine(lineDes, y);

        iLineCheckerCounter++;

        }

    // end draw checkers

    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard svg4"));

    CleanupStack::PopAndDestroy(maskBuf);

    CleanupStack::PopAndDestroy(lineBuf);

    CleanupStack::PopAndDestroy(2); // sourceIcon, sourceIconMask

    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard left"));

    }