121 lines
4.3 KiB
C++
121 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* This file incorporates work covered by the following license notice:
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed
|
|
* with this work for additional information regarding copyright
|
|
* ownership. The ASF licenses this file to you under the Apache
|
|
* License, Version 2.0 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
|
|
*/
|
|
|
|
#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
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|