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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "basebmp/polypolygonrenderer.hxx"
#include <algorithm>
namespace basebmp
{
namespace detail
{
sal_uInt32 setupGlobalEdgeTable( VectorOfVectorOfVertices& rGET,
basegfx::B2DPolyPolygon const& rPolyPoly,
sal_Int32 nMinY )
{
sal_Int32 const nNumScanlines( (sal_Int32)rGET.size() );
// add all polygons to GET
for( sal_uInt32 i(0), nCount(rPolyPoly.count());
i<nCount;
++i )
{
// add all vertices to GET
const basegfx::B2DPolygon& rPoly( rPolyPoly.getB2DPolygon(i) );
for( sal_uInt32 k(0), nVertices(rPoly.count());
k<nVertices;
++k )
{
const basegfx::B2DPoint& rP1( rPoly.getB2DPoint(k) );
const basegfx::B2DPoint& rP2( rPoly.getB2DPoint( (k + 1) % nVertices ) );
const sal_Int32 nVertexYP1( basegfx::fround(rP1.getY()) );
const sal_Int32 nVertexYP2( basegfx::fround(rP2.getY()) );
// insert only vertices which are not strictly
// horizontal. Strictly horizontal vertices don't add
// any information that is not already present - due
// to their adjacent vertices.
if(nVertexYP1 != nVertexYP2)
{
if( nVertexYP2 < nVertexYP1 )
{
const sal_Int32 nStartScanline(nVertexYP2 - nMinY);
// edge direction is upwards - add with swapped vertices
if( nStartScanline < nNumScanlines )
rGET[ nStartScanline ].push_back( Vertex(rP2, rP1, false) );
}
else
{
const sal_Int32 nStartScanline(nVertexYP1 - nMinY);
if( nStartScanline < nNumScanlines )
rGET[ nStartScanline ].push_back( Vertex(rP1, rP2, true) );
}
}
}
}
// now sort all scanlines individually, with increasing x
// coordinates
VectorOfVectorOfVertices::iterator aIter( rGET.begin() );
const VectorOfVectorOfVertices::iterator aEnd( rGET.end() );
sal_uInt32 nVertexCount(0);
RasterConvertVertexComparator aComp;
while( aIter != aEnd )
{
std::sort( aIter->begin(),
aIter->end(),
aComp );
nVertexCount += aIter->size();
++aIter;
}
return nVertexCount;
}
void sortAET( VectorOfVertexPtr& rAETSrc,
VectorOfVertexPtr& rAETDest )
{
static RasterConvertVertexComparator aComp;
rAETDest.clear();
// prune AET from ended edges
VectorOfVertexPtr::iterator iter( rAETSrc.begin() );
VectorOfVertexPtr::iterator const end( rAETSrc.end() );
while( iter != end )
{
if( (*iter)->mnYCounter > 0 )
rAETDest.push_back( *iter );
++iter;
}
// stable sort is necessary, to avoid segment crossing where
// none was intended.
std::stable_sort( rAETDest.begin(), rAETDest.end(), aComp );
}
} // namespace detail
} // namespace basebmp
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