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/*
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* Copyright (c) 2002 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: Graphics Extension Library source file
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*
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*/
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#include "GfxFlatteningPathIterator.h"
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#include "GfxShape.h"
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#include "GfxAffineTransform.h"
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// ---------------------------------------------------------------------------
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// Constructors
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// ---------------------------------------------------------------------------
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CGfxFlatteningPathIterator::CGfxFlatteningPathIterator( TInt32 aLimit )
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: iIdx( 0 ),
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iSegType( EGfxSegClose ),
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iIsDone( EFalse ),
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iLimit( aLimit )
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{
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}
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// ---------------------------------------------------------------------------
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// Create a new instance.
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// ---------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// CGfxFlatteningPathIterator* CGfxFlatteningPathIterator::NewL( MGfxShape* aSrc,
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// ---------------------------------------------------------------------------
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CGfxFlatteningPathIterator* CGfxFlatteningPathIterator::NewL( MGfxShape* aSrc,
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TGfxAffineTransform* aAt,
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TInt32 aLimit )
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{
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CGfxFlatteningPathIterator* self = new ( ELeave )
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CGfxFlatteningPathIterator( aLimit );
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CleanupStack::PushL( self );
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self->ConstructL( aSrc, aAt );
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CleanupStack::Pop();
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return self;
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}
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// ---------------------------------------------------------------------------
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// Second phase in constructing this object.
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::ConstructL( MGfxShape* aSrc,
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TGfxAffineTransform* aAt )
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{
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aSrc->GetPathIteratorL( aAt, iSrc );
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iCoords = new ( ELeave ) RArray<TFloatFixPt>( 10 );
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iCoords->AppendL( NULL );
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iCoords->Remove(0);
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NextL();
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}
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// ---------------------------------------------------------------------------
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// Destructor.
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// ---------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// CGfxFlatteningPathIterator::~CGfxFlatteningPathIterator()
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// ---------------------------------------------------------------------------
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CGfxFlatteningPathIterator::~CGfxFlatteningPathIterator()
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{
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if ( iSrc )
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{
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delete iSrc;
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iSrc = NULL;
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}
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if ( iCoords )
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{
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iCoords->Close();
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delete iCoords;
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iCoords = NULL;
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}
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}
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// --------------------------------------------------------------------------
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// TGfxSegType CGfxFlatteningPathIterator::CurrentSegment( TFloatFixPt* aCoords )
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// ---------------------------------------------------------------------------
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TGfxSegType CGfxFlatteningPathIterator::CurrentSegment( TFloatFixPt* aCoords )
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{
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if ( iCoords->Count() > 0 && iCoords->Count() > iIdx )
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{
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aCoords[0] = ( *iCoords )[iIdx];
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aCoords[1] = ( *iCoords )[iIdx + 1];
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}
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return iSegType;
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}
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// --------------------------------------------------------------------------
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// TBool CGfxFlatteningPathIterator::IsDone()
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// ---------------------------------------------------------------------------
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TBool CGfxFlatteningPathIterator::IsDone()
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{
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return iIsDone;
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}
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// --------------------------------------------------------------------------
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// void CGfxFlatteningPathIterator::Next()
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::NextL()
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{
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iIdx += 2;
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if ( iCoords->Count() <= 0 || iCoords->Count() <= iIdx )
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{
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TFloatFixPt tmpcoords[6];
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TInt i;
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iCoords->Reset();
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iIdx = 0;
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if ( iSrc->IsDone() )
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{
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iIsDone = ETrue;
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}
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else
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{
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iSegType = iSrc->CurrentSegment( tmpcoords );
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switch ( iSegType )
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{
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case EGfxSegMoveTo:
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iLastX = tmpcoords[0];
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iLastY = tmpcoords[1];
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iCoords->AppendL( iLastX );
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iCoords->AppendL( iLastY );
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break;
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case EGfxSegLineTo:
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iLastX = tmpcoords[0];
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iLastY = tmpcoords[1];
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iCoords->AppendL( iLastX );
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iCoords->AppendL( iLastY );
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break;
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case EGfxSegQuadTo:
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iCoords->AppendL( iLastX );
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iCoords->AppendL( iLastY );
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iCoords->AppendL( tmpcoords[0] );
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iCoords->AppendL( tmpcoords[1] );
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iCoords->AppendL( tmpcoords[2] );
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iCoords->AppendL( tmpcoords[3] );
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for ( i = 0; i < iLimit; i++ )
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CreateSubcurveQuadL( iCoords );
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//CreateSubcurveQuad(iCoords);
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//CreateSubcurveQuad(iCoords);
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//CreateSubcurveQuad(iCoords);
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iIdx = 2;
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iLastX = tmpcoords[2];
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iLastY = tmpcoords[3];
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iSegType = EGfxSegLineTo;
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break;
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case EGfxSegCubicTo:
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iCoords->AppendL( iLastX );
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iCoords->AppendL( iLastY );
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iCoords->AppendL( tmpcoords[0] );
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iCoords->AppendL( tmpcoords[1] );
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iCoords->AppendL( tmpcoords[2] );
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iCoords->AppendL( tmpcoords[3] );
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iCoords->AppendL( tmpcoords[4] );
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iCoords->AppendL( tmpcoords[5] );
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for ( i = 0; i < iLimit; i++ )
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CreateSubcurveCubicL( iCoords );
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iIdx = 2;
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iLastX = tmpcoords[4];
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iLastY = tmpcoords[5];
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iSegType = EGfxSegLineTo;
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break;
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case EGfxSegClose: // (cdm)
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iLastX = tmpcoords[0];
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iLastY = tmpcoords[1];
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iCoords->AppendL( iLastX );
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iCoords->AppendL( iLastY );
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break;
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default:
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break;
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}
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iSrc->NextL();
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}
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}
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}
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// --------------------------------------------------------------------------
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// void CGfxFlatteningPathIterator::SetFlatness( TFloatFixPt& aFlatness )
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::SetFlatness( TFloatFixPt& aFlatness )
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{
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iFlatness = aFlatness;
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}
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// --------------------------------------------------------------------------
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// void CGfxFlatteningPathIterator::SetRecursionLimit( TInt32 aLimit )
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::SetRecursionLimit( TInt32 aLimit )
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{
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iLimit = aLimit;
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}
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// --------------------------------------------------------------------------
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// TFloatFixPt CGfxFlatteningPathIterator::Flatness()
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// ---------------------------------------------------------------------------
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TFloatFixPt CGfxFlatteningPathIterator::Flatness()
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{
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return iFlatness;
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}
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// --------------------------------------------------------------------------
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// TInt32 CGfxFlatteningPathIterator::RecursionLimit()
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// ---------------------------------------------------------------------------
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TInt32 CGfxFlatteningPathIterator::RecursionLimit()
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{
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return iLimit;
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}
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// --------------------------------------------------------------------------
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// void CGfxFlatteningPathIterator::CreateSubcurveQuad( RArray<TFloatFixPt>* aCtrlPoints )
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::CreateSubcurveQuadL( RArray<TFloatFixPt>* aCtrlPoints )
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{
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TInt32 ix = 0;
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TFloatFixPt x0, y0, xm, ym, x1, y1;
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TInt32 lCount;
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while ( ix + 5 < aCtrlPoints->Count() )
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{
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lCount = ix;
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x0 = ( *aCtrlPoints )[lCount++];
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y0 = ( *aCtrlPoints )[lCount++];
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xm = ( *aCtrlPoints )[lCount++];
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ym = ( *aCtrlPoints )[lCount++];
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x1 = ( *aCtrlPoints )[lCount++];
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y1 = ( *aCtrlPoints )[lCount++];
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#ifdef SVG_FLOAT_BUILD
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x0 = ( x0 + xm ) * .5f;
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y0 = ( y0 + ym ) * .5f;
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x1 = ( x1 + xm ) * .5f;
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y1 = ( y1 + ym ) * .5f;
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xm = ( x0 + x1 ) * .5f;
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ym = ( y0 + y1 ) * .5f;
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#else
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x0 = ( x0 + xm ) >> 1;
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y0 = ( y0 + ym ) >> 1;
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x1 = ( x1 + xm ) >> 1;
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y1 = ( y1 + ym ) >> 1;
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xm = ( x0 + x1 ) >> 1;
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ym = ( y0 + y1 ) >> 1;
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#endif
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lCount=ix + 2;
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( *aCtrlPoints )[lCount] = xm;
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( *aCtrlPoints )[lCount + 1] = ym;
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aCtrlPoints->InsertL( TFloatFixPt( x0 ), lCount++);
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aCtrlPoints->InsertL( TFloatFixPt( y0 ), lCount );
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aCtrlPoints->InsertL( TFloatFixPt( x1 ), ix + 6 );
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aCtrlPoints->InsertL( TFloatFixPt( y1 ), ix + 7 );
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ix += 8;
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}
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}
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// --------------------------------------------------------------------------
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// void CGfxFlatteningPathIterator::CreateSubcurveCubic( RArray<TFloatFixPt>* aCtrlPoints )
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::CreateSubcurveCubicL( RArray<TFloatFixPt>* aCtrlPoints )
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{
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TInt32 ix = 0;
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TFloatFixPt x0, y0, xm, ym, xm1, ym1, xm2, ym2, x1, y1;
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TInt32 lCount;
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while ( ix + 7 < aCtrlPoints->Count() )
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{
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lCount = ix;
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x0 = ( *aCtrlPoints )[lCount++];
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y0 = ( *aCtrlPoints )[lCount++];
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xm1 = ( *aCtrlPoints )[lCount++];
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ym1 = ( *aCtrlPoints )[lCount++];
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xm2 = ( *aCtrlPoints )[lCount++];
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ym2 = ( *aCtrlPoints )[lCount++];
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x1 = ( *aCtrlPoints )[lCount++];
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y1 = ( *aCtrlPoints )[lCount ];
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#ifdef SVG_FLOAT_BUILD
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x0 = ( x0 + xm1 ) * .5f;
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y0 = ( y0 + ym1 ) * .5f;
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x1 = ( x1 + xm2 ) * .5f;
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y1 = ( y1 + ym2 ) * .5f;
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xm = ( xm1 + xm2 ) * .5f;
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ym = ( ym1 + ym2 ) * .5f;
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xm1 = ( x0 + xm ) * .5f;
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ym1 = ( y0 + ym ) * .5f;
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xm2 = ( x1 + xm ) * .5f;
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ym2 = ( y1 + ym ) * .5f;
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xm = ( xm1 + xm2 ) * .5f;
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ym = ( ym1 + ym2 ) * .5f;
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#else
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x0 = ( x0 + xm1 ) >> 1;
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y0 = ( y0 + ym1 ) >> 1;
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x1 = ( x1 + xm2 ) >> 1;
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y1 = ( y1 + ym2 ) >> 1;
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xm = ( xm1 + xm2 ) >> 1;
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ym = ( ym1 + ym2 ) >> 1;
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xm1 = ( x0 + xm ) >> 1;
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ym1 = ( y0 + ym ) >> 1;
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xm2 = ( x1 + xm ) >> 1;
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ym2 = ( y1 + ym ) >> 1;
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xm = ( xm1 + xm2 ) >> 1;
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ym = ( ym1 + ym2 ) >> 1;
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#endif
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lCount=ix + 2;
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( *aCtrlPoints )[lCount++] = x0;
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( *aCtrlPoints )[lCount++] = y0;
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( *aCtrlPoints )[lCount++] = xm1;
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( *aCtrlPoints )[lCount++] = ym1;
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aCtrlPoints->InsertL( TFloatFixPt( y1 ), lCount);
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aCtrlPoints->InsertL( TFloatFixPt( x1 ), lCount );
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aCtrlPoints->InsertL( TFloatFixPt( ym2 ), lCount );
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aCtrlPoints->InsertL( TFloatFixPt( xm2 ), lCount );
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aCtrlPoints->InsertL( TFloatFixPt( ym ), lCount );
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aCtrlPoints->InsertL( TFloatFixPt( xm ), lCount );
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ix += 12;
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}
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}
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// --------------------------------------------------------------------------
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// void CGfxFlatteningPathIterator::PolygonizeL( CGfxEdgeListP* /* aRenderer */, TInt /* aFlatness */ )
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// ---------------------------------------------------------------------------
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void CGfxFlatteningPathIterator::PolygonizeL( CGfxEdgeListP* /* aRenderer */, TInt /* aFlatness */ )
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{
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}
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