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Diffstat (limited to 'basegfx/inc/basegfx/polygon/b2dtrapezoid.hxx')
-rw-r--r-- | basegfx/inc/basegfx/polygon/b2dtrapezoid.hxx | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/basegfx/inc/basegfx/polygon/b2dtrapezoid.hxx b/basegfx/inc/basegfx/polygon/b2dtrapezoid.hxx new file mode 100644 index 000000000000..70ffdf2b7339 --- /dev/null +++ b/basegfx/inc/basegfx/polygon/b2dtrapezoid.hxx @@ -0,0 +1,132 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2008 by Sun Microsystems, Inc. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: b2dpolygontriangulator.hxx,v $ + * $Revision: 1.5 $ + * + * 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. + * + ************************************************************************/ + +#ifndef _BGFX_POLYGON_B2DTRAPEZOID_HXX +#define _BGFX_POLYGON_B2DTRAPEZOID_HXX + +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <vector> + +////////////////////////////////////////////////////////////////////////////// + +namespace basegfx +{ + // class to hold a single trapezoid + class B2DTrapezoid + { + private: + // Geometry data. YValues are down-oriented, this means bottom should + // be bigger than top to be below it. The constructor implementation + // guarantees: + // + // - mfBottomY >= mfTopY + // - mfTopXRight >= mfTopXLeft + // - mfBottomXRight >= mfBottomXLeft + double mfTopXLeft; + double mfTopXRight; + double mfTopY; + double mfBottomXLeft; + double mfBottomXRight; + double mfBottomY; + + public: + // constructor + B2DTrapezoid( + const double& rfTopXLeft, + const double& rfTopXRight, + const double& rfTopY, + const double& rfBottomXLeft, + const double& rfBottomXRight, + const double& rfBottomY); + + // data read access + const double& getTopXLeft() const { return mfTopXLeft; } + const double& getTopXRight() const { return mfTopXRight; } + const double& getTopY() const { return mfTopY; } + const double& getBottomXLeft() const { return mfBottomXLeft; } + const double& getBottomXRight() const { return mfBottomXRight; } + const double& getBottomY() const { return mfBottomY; } + + // convenience method to get content as Polygon + B2DPolygon getB2DPolygon() const; + }; + + typedef ::std::vector< B2DTrapezoid > B2DTrapezoidVector; + +} // end of namespace basegfx + +////////////////////////////////////////////////////////////////////////////// + +namespace basegfx +{ + namespace tools + { + // convert SourcePolyPolygon to trapezoids. The trapezoids will be appended to + // ro_Result. ro_Result will not be cleared. If SourcePolyPolygon contains curves, + // it's default AdaptiveSubdivision will be used. + // CAUTION: Trapezoids are oreintation-dependent in the sense that the upper and lower + // lines have to be parallel to the X-Axis, thus this subdivision is NOT simply usable + // for primitive decompositions. To use it, the shear and rotate parts of the + // involved transformations HAVE to be taken into account. + void trapezoidSubdivide( + B2DTrapezoidVector& ro_Result, + const B2DPolyPolygon& rSourcePolyPolygon); + + // directly create trapezoids from given edge. Depending on the given geometry, + // none up to three trapezoids will be created + void createLineTrapezoidFromEdge( + B2DTrapezoidVector& ro_Result, + const B2DPoint& rPointA, + const B2DPoint& rPointB, + double fLineWidth = 1.0); + + // create trapezoids for all edges of the given polygon. The closed state of + // the polygon is taken into account. If curves are contaned, the default + // AdaptiveSubdivision will be used. + void createLineTrapezoidFromB2DPolygon( + B2DTrapezoidVector& ro_Result, + const B2DPolygon& rPolygon, + double fLineWidth = 1.0); + + // create trapezoids for all edges of the given polyPolygon. The closed state of + // the PolyPolygon is taken into account. If curves are contaned, the default + // AdaptiveSubdivision will be used. + void createLineTrapezoidFromB2DPolyPolygon( + B2DTrapezoidVector& ro_Result, + const B2DPolyPolygon& rPolyPolygon, + double fLineWidth = 1.0); + + } // end of namespace tools +} // end of namespace basegfx + +////////////////////////////////////////////////////////////////////////////// + +#endif /* _BGFX_POLYGON_B2DTRAPEZOID_HXX */ |