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cliprect.cpp

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/*
        $Id: cliprect.cpp,v 1.1 2001/03/06 15:09:17 mbn Exp $

        ------------------------------------------------------------------------
        ClanLib, the platform independent game SDK.

        This library is distributed under the GNU LIBRARY GENERAL PUBLIC LICENSE
        version 2. See COPYING for details.

        For a total list of contributers see CREDITS.

        ------------------------------------------------------------------------
*/

#include "Core/precomp.h"

#include <API/Display/Display/cliprect.h>

CL_ClipRect::CL_ClipRect()
{
}

CL_ClipRect::CL_ClipRect(const CL_ClipRect &rect)
{
        m_x1 = rect.m_x1;
        m_y1 = rect.m_y1;
        m_x2 = rect.m_x2;
        m_y2 = rect.m_y2;
}

CL_ClipRect::CL_ClipRect(int x1, int y1, int x2, int y2)
{
        if (x1 <= x2)
        {
                m_x1 = x1;
                m_x2 = x2;
        }
        else
        {
                m_x1 = x2;
                m_x2 = x1;
        }

        if (y1 <= y2)
        {
                m_y1 = y1;
                m_y2 = y2;
        }
        else
        {
                m_y1 = y2;
                m_y2 = y1;
        }
}

bool CL_ClipRect::test_clipped(const CL_ClipRect &rect) const
{
        if (m_x1 > rect.m_x1) return true;
        if (m_x2 < rect.m_x2) return true;
        if (m_y1 > rect.m_y1) return true;
        if (m_y2 < rect.m_y2) return true;

        return false;
}

bool CL_ClipRect::test_unclipped(const CL_ClipRect &rect) const
{
        return m_x1 <= rect.m_x1 &&
               m_y1 <= rect.m_y1 &&
               m_x2 >= rect.m_x2 &&
               m_y2 >= rect.m_y2;
}

bool CL_ClipRect::test_all_clipped(const CL_ClipRect &rect) const
{
        CL_ClipRect clipped_rect = clip(rect);

        return (clipped_rect.m_x1 > clipped_rect.m_x2) ||
               (clipped_rect.m_y1 > clipped_rect.m_y2);
}

CL_ClipRect CL_ClipRect::clip(const CL_ClipRect &rect) const
{
        CL_ClipRect res;

        if (m_x1 > rect.m_x1) res.m_x1 = m_x1; else res.m_x1 = rect.m_x1;
        if (m_x2 < rect.m_x2) res.m_x2 = m_x2; else res.m_x2 = rect.m_x2;
        if (m_y1 > rect.m_y1) res.m_y1 = m_y1; else res.m_y1 = rect.m_y1;
        if (m_y2 < rect.m_y2) res.m_y2 = m_y2; else res.m_y2 = rect.m_y2;
        
        return res;
}

bool CL_ClipRect::operator ==(const CL_ClipRect &rect) const
{
        return m_x1 == rect.m_x1 &&
               m_y1 == rect.m_y1 &&
               m_x2 == rect.m_x2 &&
               m_y2 == rect.m_y2;
}

/*std::ostream& operator << (std::ostream &os, CL_ClipRect &rect)
{
        os << "(" << rect.m_x1 << ", " << rect.m_y1 << ")-(" << rect.m_x2 << ", " << rect.m_y2 << ")";

        return os;
}
*/

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