rectcliptools.hxx

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#pragma once
 
#include <sal/types.h>
#include <basegfx/range/b2ibox.hxx>
 
 
namespace basegfx::utils
{
    namespace RectClipFlags
    {
        const sal_uInt32 LEFT   = sal_Int32(0x01);
        const sal_uInt32 RIGHT  = sal_Int32(0x02);
        const sal_uInt32 TOP    = sal_Int32(0x04);
        const sal_uInt32 BOTTOM = sal_Int32(0x08);
    }
 
    template< class Point, class Rect > inline
       sal_uInt32 getCohenSutherlandClipFlags( const Point& rP,
                                               const Rect&  rR )
    {
        // maxY | minY | maxX | minX
        sal_uInt32 clip;
        clip = (rP.getX() < rR.getMinX()) << 0;
        clip |= (rP.getX() > rR.getMaxX()) << 1;
        clip |= (rP.getY() < rR.getMinY()) << 2;
        clip |= (rP.getY() > rR.getMaxY()) << 3;
        return clip;
    }
 
    template< class Point > inline
       sal_uInt32 getCohenSutherlandClipFlags( const Point&  rP,
                                               const B2IBox& rB )
    {
        // maxY | minY | maxX | minX
        sal_uInt32 clip;
        clip = (rP.getX() <  rB.getMinX()) << 0;
        clip |= (rP.getX() >= rB.getMaxX()) << 1;
        clip |= (rP.getY() <  rB.getMinY()) << 2;
        clip |= (rP.getY() >= rB.getMaxY()) << 3;
        return clip;
    }
}
 
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