include/basegfx/polygon/b2dpolygonclipper.hxx

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  19
  20 #ifndef INCLUDED_BASEGFX_POLYGON_B2DPOLYGONCLIPPER_HXX
  21 #define INCLUDED_BASEGFX_POLYGON_B2DPOLYGONCLIPPER_HXX
  22
  23 #include <basegfx/polygon/b2dpolypolygon.hxx>
  24 #include <basegfx/polygon/b2dpolygon.hxx>
  25 #include <basegfx/basegfxdllapi.h>
  26
  27
  28 namespace basegfx
  29 {
  30     // predefinitions
  31     class B2DRange;
  32
  33     namespace utils
  34     {
  35         // This method clips the given tools::PolyPolygon against a horizontal or vertical axis (parallel to X or Y axis). The axis is
  36         // defined by bParallelToXAxis (true -> it's parallel to the X-Axis of the coordinate system, else to the Y-Axis) and the
  37         // fValueOnOtherAxis (gives the translation to the coordinate system axis). For example, when You want to define
  38         // a clip axis parallel to X.Axis and 100 above it, use bParallelToXAxis = true and fValueOnOtherAxis = 100.
  39         // The value bAboveAxis defines on which side the return value will be (true -> above X, right of Y).
  40         // The switch bStroke decides if the polygon is interpreted as area (false) or strokes (true).
  41         BASEGFX_DLLPUBLIC B2DPolyPolygon clipPolyPolygonOnParallelAxis(const B2DPolyPolygon& rCandidate, bool bParallelToXAxis, bool bAboveAxis, double fValueOnOtherAxis, bool bStroke);
  42         BASEGFX_DLLPUBLIC B2DPolyPolygon clipPolygonOnParallelAxis(const B2DPolygon& rCandidate, bool bParallelToXAxis, bool bAboveAxis, double fValueOnOtherAxis, bool bStroke);
  43
  44         // Clip the given tools::PolyPolygon against the given range. bInside defines if the result will contain the
  45         // parts which are contained in the range or vice versa.
  46         // The switch bStroke decides if the polygon is interpreted as area (false) or strokes (true).
  47         BASEGFX_DLLPUBLIC B2DPolyPolygon clipPolyPolygonOnRange(const B2DPolyPolygon& rCandidate, const B2DRange& rRange, bool bInside, bool bStroke);
  48         BASEGFX_DLLPUBLIC B2DPolyPolygon clipPolygonOnRange(const B2DPolygon& rCandidate, const B2DRange& rRange, bool bInside, bool bStroke);
  49
  50         // Clip given tools::PolyPolygon against given clipping polygon.
  51         // The switch bStroke decides if the polygon is interpreted as area (false) or strokes (true).
  52         // With stroke polygons, You get all line snippets inside rCip.
  53         // With filled polygons, You get all tools::PolyPolygon parts which were inside rClip.
  54         // The switch bInside decides if the parts inside the clip polygon or outside shall be created.
  55         // The clip polygon is always assumed closed, even when it's isClosed() is false.
  56         BASEGFX_DLLPUBLIC B2DPolyPolygon clipPolyPolygonOnPolyPolygon(const B2DPolyPolygon& rCandidate, const B2DPolyPolygon& rClip, bool bInside, bool bStroke);
  57         BASEGFX_DLLPUBLIC B2DPolyPolygon clipPolygonOnPolyPolygon(const B2DPolygon& rCandidate, const B2DPolyPolygon& rClip, bool bInside, bool bStroke);
  58
  59         // clip the given polygon against the given range. the resulting polygon will always contain
  60         // the inside parts which will always be interpreted as areas. the incoming polygon is expected
  61         // to be a simple triangle list. the result is also a simple triangle list.
  62         BASEGFX_DLLPUBLIC B2DPolygon clipTriangleListOnRange( const B2DPolygon& rCandidate, const B2DRange& rRange );
  63
  64     } // end of namespace utils
  65 } // end of namespace basegfx
  66
  67 #endif // INCLUDED_BASEGFX_POLYGON_B2DPOLYGONCLIPPER_HXX
  68
  69 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */