// Wild Magic Source Code
// David Eberly
// http://www.geometrictools.com
// Copyright (c) 1998-2008
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2.1 of the License, or (at
// your option) any later version.  The license is available for reading at
// either of the locations:
//     http://www.gnu.org/copyleft/lgpl.html
//     http://www.geometrictools.com/License/WildMagicLicense.pdf
//
// Version: 4.0.0 (2006/06/28)

#include "Wm4SoftRendererPCH.h"
#include "Wm4SoftRenderer.h"
using namespace Wm4;

//----------------------------------------------------------------------------
void SoftRenderer::SetPolygonOffsetState (PolygonOffsetState* pkState)
{
    // The LineEnabled and PointEnabled members are ignored by the software
    // renderer.

    Renderer::SetPolygonOffsetState(pkState);

    if (pkState->FillEnabled)
    {
        m_fPolygonOffsetScale = pkState->Scale;

        // TO DO.  The renderer currently always creates a 24-bit depth
        // buffer.  If the precision changes, the adjustment to depth bias
        // must depend on the bits of precision.  The divisor is 2^n for n
        // bits of precision.
        m_fPolygonOffsetBias = pkState->Bias/16777216.0f;
    }
    else
    {
        m_fPolygonOffsetScale = 0.0f;
        m_fPolygonOffsetBias = 0.0f;
    }
}
//----------------------------------------------------------------------------
