camerauis/activepalette/Src/ActivePalette2CheckerboardStyler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 07 Jan 2010 16:18:56 +0200
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/*
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Active Palette Checkerboard Styler*
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*/
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/**
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 * @file ActivePalette2CheckerboardStyler.cpp
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 * Active Palette Checkerboard Styler
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 */
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#include "ActivePalette2Logger.h"
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#include "ActivePalette2CheckerboardStyler.h"
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#include "ActivePalette2Cfg.h"
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#include "ActivePalette2Utils.h"
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#include <activepalette2graphics.mbg>
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#include <bitstd.h>
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#include <gdi.h>
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#include <AknIconUtils.h>
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/// Returns whether supplied number is odd
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#define IS_ODD(num) ((num) & 1)
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// Lightness threshold for checking whether a pixel
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// should be considered 'white'. Lightness is defined as the sum of the
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// 8-bit red, green, and blue values.
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const TInt KLightnessThreshold = 0x80 * 3;
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// Threshold for determining if a pixel in a soft mask is considered
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// opaque or transparent.
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const TUint8 KMaskThreshold = 0x7f;
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// Color value for transparent pixel (ARGB format).
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const TUint32 KColorKey = 0xFF000000;
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// Color value for opaque pixel (ARGB format).
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const TUint32 KOpaqueColor = 0x00FFFFFF;
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::NewL()
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// -----------------------------------------------------------------------------
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//
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CActivePalette2CheckerboardStyler* CActivePalette2CheckerboardStyler::NewL()
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    {
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	CActivePalette2CheckerboardStyler* self = new (ELeave) CActivePalette2CheckerboardStyler();
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	CleanupStack::PushL(self);
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	self->ConstructL();
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	CleanupStack::Pop(); // this
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	return self;
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::ConstructL()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::ConstructL()
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    {
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	LOGTEXT( _L( "CActivePalette2CheckerboardStyler::ConstructL entered"));
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    CActivePalette2Styler::ConstructL();
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	iAPTopSectionMask	    = new (ELeave) CFbsBitmap;
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	iAPItemMaskA            = new (ELeave) CFbsBitmap;
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	iAPItemMaskB            = new (ELeave) CFbsBitmap;
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	iAPGapMaskA	            = new (ELeave) CFbsBitmap;
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	iAPGapMaskB	            = new (ELeave) CFbsBitmap;
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	iAPBottomSectionMaskA   = new (ELeave) CFbsBitmap;
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	iAPBottomSectionMaskB   = new (ELeave) CFbsBitmap;
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    // The order of calling these has an importance, to create the checkers correctly
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    LoadAndScaleCheckerboardL( iAPTopSectionMask, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_top, EMbmActivepalette2graphicsQgn_graf_cam4_tb_top_mask, 
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::ETopSectionHeight) ) );
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    LoadAndScaleCheckerboardL( iAPItemMaskA, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body_mask, 
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemHeight) ) );
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    LoadAndScaleCheckerboardL( iAPGapMaskA, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap_mask, 
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EGapBetweenItems) ) );
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    LoadAndScaleCheckerboardL( iAPItemMaskB, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body, EMbmActivepalette2graphicsQgn_graf_cam4_tb_body_mask,
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemHeight) ) );
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    LoadAndScaleCheckerboardL( iAPGapMaskB, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap, EMbmActivepalette2graphicsQgn_graf_cam4_tb_gap_mask, 
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EGapBetweenItems) ) );
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    LoadAndScaleCheckerboardL( iAPBottomSectionMaskB, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom_mask,
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EBottomSectionHeight) ) );
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    LoadAndScaleCheckerboardL( iAPBottomSectionMaskA, NAP2Cfg::KUIGraphics, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom, EMbmActivepalette2graphicsQgn_graf_cam4_tb_bottom_mask,
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            TSize(ActivePalette2Utils::APDimension(ActivePalette2Utils::EPaletteWidth), ActivePalette2Utils::APDimension(ActivePalette2Utils::EBottomSectionHeight) ) );
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	LOGTEXT( _L( "CActivePalette2CheckerboardStyler::ConstructL Left"));
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::~CActivePalette2CheckerboardStyler()
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// -----------------------------------------------------------------------------
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//
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CActivePalette2CheckerboardStyler::~CActivePalette2CheckerboardStyler()
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    {
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	delete iAPTopSectionMask;
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	delete iAPItemMaskA;
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	delete iAPItemMaskB;
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	delete iAPGapMaskA;
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	delete iAPGapMaskB;
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	delete iAPBottomSectionMaskA;
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	delete iAPBottomSectionMaskB;
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::DrawItem()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::DrawItem(TInt aScreenPos, CFbsBitmap* aIcon, CFbsBitmap* aMask, TInt aOffsetFrame, TInt aOffsetTotal)
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    {
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    TRect area(ItemRect(aScreenPos, aOffsetFrame, aOffsetTotal));
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    iDrawBufContext->SetClippingRect(iItemsRect);
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    iDrawBufMaskContext->SetClippingRect(iItemsRect);
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    if ( IS_ODD(aScreenPos) )
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        {  
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        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPItem, iAPItemMaskB, EFalse, EFalse);
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        }
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    else
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        {
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        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPItem, iAPItemMaskA, EFalse, EFalse);
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        }
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	BlitGraphic(area.iTl + TPoint(ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemXOffset),0), iDrawBufContext, iDrawBufMaskContext, aIcon, aMask, ETrue, ETrue);
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    iDrawBufMaskContext->CancelClippingRect();
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    iDrawBufContext->CancelClippingRect();
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    area.Intersection(iItemsRect);
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    AddToDirtyRect(	area );
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::DrawGap()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::DrawGap(TInt aScreenPos, TInt aOffsetFrame, TInt aOffsetTotal)
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    {
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    TRect area(GapRect(aScreenPos, aOffsetFrame, aOffsetTotal));
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    iDrawBufContext->SetClippingRect(iItemsRect);
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    iDrawBufMaskContext->SetClippingRect(iItemsRect);
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    if ( IS_ODD(aScreenPos) )
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        {  
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        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPGap, iAPGapMaskB, EFalse, EFalse);
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        }
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    else
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        {  
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        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPGap, iAPGapMaskA, EFalse, EFalse);
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        }
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   165
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    iDrawBufMaskContext->CancelClippingRect();
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    iDrawBufContext->CancelClippingRect();
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   168
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    area.Intersection(iItemsRect);
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    AddToDirtyRect(	area );
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::AnimItem()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::AnimItem(TInt aScreenPos, CFbsBitmap* aIcon, CFbsBitmap* aMask)
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    {
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    TRect area(ItemRect(aScreenPos));
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    area.iTl.iX = ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemXOffset);
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    area.SetWidth(ActivePalette2Utils::APDimension( ActivePalette2Utils::EItemWidth ));
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    TRect clippingRect(TPoint(ActivePalette2Utils::APDimension(ActivePalette2Utils::EItemXOffset), 0), ActivePalette2Utils::APDimensionSize( ActivePalette2Utils::EItemSize ) );
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    iDrawBufContext->BitBlt(area.iTl, iAPItem, clippingRect);
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    if ( IS_ODD(aScreenPos) )
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        {  
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        iDrawBufMaskContext->BitBlt(area.iTl, iAPItemMaskB, clippingRect);
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        }
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    else
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        {
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        iDrawBufMaskContext->BitBlt(area.iTl, iAPItemMaskA, clippingRect);
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        }
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   195
        
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	BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, aIcon, aMask, ETrue, ETrue);
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   197
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    AddToDirtyRect(	area );
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::DrawTopScrollArrowSection()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::DrawTopScrollArrowSection(TBool aShowArrow)
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    {
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    TRect area(TopSectionRect());
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    BlitGraphic(TPoint(0,0), iDrawBufContext, iDrawBufMaskContext, iAPTopSection, iAPTopSectionMask, EFalse, EFalse);
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    if ( aShowArrow )
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        {
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        CentreGraphic(area, iDrawBufContext, iDrawBufMaskContext, iScrollUpIcon, iScrollUpIconMask, ETrue, ETrue);
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        }
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    AddToDirtyRect(	area );
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    }
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   218
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::DrawBottomScrollArrowSection()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::DrawBottomScrollArrowSection(TBool aShowArrow)
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    {
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    TRect area(BottomSectionRect());
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    if ( IS_ODD(iNumItems) )
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        {  
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        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPBottomSection, iAPBottomSectionMaskA, EFalse, EFalse);
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        }
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    else
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        {
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        BlitGraphic(area.iTl, iDrawBufContext, iDrawBufMaskContext, iAPBottomSection, iAPBottomSectionMaskB, EFalse, EFalse);
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        }
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    if ( aShowArrow )
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        {
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        CentreGraphic(area, iDrawBufContext, iDrawBufMaskContext, iScrollDownIcon, iScrollDownIconMask, ETrue, ETrue);
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        }
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    AddToDirtyRect(	area );
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    }
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// -----------------------------------------------------------------------------
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// CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard()
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// -----------------------------------------------------------------------------
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//
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void CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboardL(
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                                                CFbsBitmap* aTargetBitmap,
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                                                const TDesC& aFileName,
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                                                TInt32 aId,
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                                                TInt32 aMaskId,
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                                                TSize aSize )
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    {
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    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard entered"));
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    CFbsBitmap* sourceIcon = NULL;
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    CFbsBitmap* sourceIconMask = NULL;
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    AknIconUtils::CreateIconLC(sourceIcon, sourceIconMask, aFileName, aId, aMaskId);
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    AknIconUtils::SetSize(sourceIcon, aSize);
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    AknIconUtils::SetSize(sourceIconMask, aSize);
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    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard svg icons loaded"));
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    User::LeaveIfError( aTargetBitmap->Create( aSize, EColor16MA ) );
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    TSize bmpSize = aTargetBitmap->SizeInPixels();
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    TRgb rgbColor = KRgbBlack;
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    TRgb rgbAlphaColor = KRgbBlack;
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    HBufC8* lineBuf = HBufC8::NewLC( CFbsBitmap::ScanLineLength( bmpSize.iWidth, EColor16MA ) );
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    TPtr8 lineDes = lineBuf->Des();
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    HBufC8* maskBuf = HBufC8::NewLC( CFbsBitmap::ScanLineLength( bmpSize.iWidth, EGray256 ) );
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    TPtr8 maskDes = maskBuf->Des();
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    for (TInt y = 0; y < bmpSize.iHeight; y++)
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        {
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        sourceIcon->GetScanLine(
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                lineDes, TPoint(0, y), bmpSize.iWidth, EColor16MA);
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        sourceIconMask->GetScanLine(
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                maskDes, TPoint(0, y), bmpSize.iWidth, EGray256);
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        // EColor16MA is 4 bytes (32-bits) per pixel
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        TUint32* linePtr = reinterpret_cast<TUint32*>( &lineDes[0] );
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        // EGray256 is 1 byte per pixel
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        TUint8* maskPtr = reinterpret_cast<TUint8*>( &maskDes[0] );
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        for( TInt x = 0; x < bmpSize.iWidth; x++ )
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            {
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            TUint32 color = linePtr[x];
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            TUint8 mask = maskPtr[x];
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            // Get the RGB values in order to check the lightness of the pixel
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            // to determine whether to mask with the checkerboard pattern.
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            TInt lightness =
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                (color & 0xFF) +         // blue
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                ((color >> 8) & 0xFF) +  // green
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                ((color >> 16) & 0xFF);  // red
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            if ( mask < KMaskThreshold )
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                {
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                // Transparent area.
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                linePtr[x] = KColorKey;
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                }
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            else if ( lightness > KLightnessThreshold )
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                {
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                // Semitransparent (dithered) area.
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                // Make every second pixel transparent.
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                if ( ( x + iLineCheckerCounter ) & 1 )
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                    {
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                    linePtr[x] = KColorKey;
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                    }
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                else
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                    {
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                    linePtr[x] = KOpaqueColor;
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                    }
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                }
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            else
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                {
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                // Fully opaque area
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                linePtr[x] = KOpaqueColor;
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                }
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            }
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   323
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        aTargetBitmap->SetScanLine(lineDes, y);
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        iLineCheckerCounter++;
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        }
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   327
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    // end draw checkers
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    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard svg4"));
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    CleanupStack::PopAndDestroy(maskBuf);
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    CleanupStack::PopAndDestroy(lineBuf);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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    CleanupStack::PopAndDestroy(2); // sourceIcon, sourceIconMask
1ddebce53859 Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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    LOGTEXT( _L( "CActivePalette2CheckerboardStyler::LoadAndScaleCheckerboard left"));
1ddebce53859 Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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    }
1ddebce53859 Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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   336
1ddebce53859 Revision: 200951
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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   337