post_shader_ssao.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2016 Mario Luzeiro <[email protected]>
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

 
#ifndef POST_SHADER_SSAO_H
#define POST_SHADER_SSAO_H
 
 
#include "post_shader.h"
 
 
class POST_SHADER_SSAO : public POST_SHADER
{
public:
    explicit POST_SHADER_SSAO( const CAMERA& aCamera );
 
    SFVEC3F Shade(const SFVEC2I& aShaderPos ) const override;
    SFVEC4F ApplyShadeColor( const SFVEC2I& aShaderPos, const SFVEC4F& aInputColor,
                             const SFVEC3F& aShadeColor ) const override;
 
    SFVEC3F Blur( const SFVEC2I& aShaderPos ) const;
 
    void SetShadedBuffer( SFVEC3F* aShadedBuffer )
    {
        m_shadedBuffer = aShadedBuffer;
    }
 
    void SetShadowsEnabled( bool aIsShadowsEnabled )
    {
        m_isUsingShadows = aIsShadowsEnabled;
    }
 
private:
    SFVEC3F posFromDepth( const SFVEC2F& coord ) const;
 
    float ec_depth( const SFVEC2F& tc ) const;
 
    float aoFF( const SFVEC2I& aShaderPos, const SFVEC3F& ddiff, const SFVEC3F& cnorm,
                const float aShadowAtSamplePos, const float aShadowAtCenterPos,
                int c1, int c2 ) const;
 
    float giFF( const SFVEC2I& aShaderPos, const SFVEC3F& ddiff, const SFVEC3F& cnorm,
                const float aShadow, int c1, int c2 ) const;

    SFVEC3F giColorCurve( const SFVEC3F& aColor ) const;
    SFVEC4F giColorCurve( const SFVEC4F& aColor ) const;
    SFVEC3F giColorCurveShade( const SFVEC4F& aColor ) const;
 
    SFVEC3F* m_shadedBuffer;
 
    bool m_isUsingShadows;
};
 
 
#endif   // POST_SHADER_SSAO_H