eaw.h

/*
 * Fermat
 *
 * Copyright (c) 2016-2019, NVIDIA CORPORATION. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * Neither the name of the NVIDIA CORPORATION nor the
 *      names of its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "framebuffer.h"
#include "filters.h"



struct EAWParams
{
    float phi_normal;
    float phi_position; // must take into account the scene size
    float phi_color;    // must take into account the maximum intensity

    cugar::Vector3f E;
    cugar::Vector3f U;
    cugar::Vector3f V;
    cugar::Vector3f W;
};

void EAW(FBufferChannelView dst, const FBufferChannelView img, const GBufferView gb, const float* var, const EAWParams params, const uint32 step_size);

void EAW(FBufferChannelView dst, const FilterOp op, const FBufferChannelView w_img, const float w_min, const FBufferChannelView img, const GBufferView gb, const float* var, const EAWParams params, const uint32 step_size);

void EAW(const uint32 n_iterations, uint32& in_buffer, FBufferChannelView pingpong[2], const GBufferView gb, const float* var, const EAWParams params);

void EAW(const uint32 n_iterations, FBufferChannelView dst, const FBufferChannelView img, const GBufferView gb, const float* var, const EAWParams params, FBufferChannelView pingpong[2]);

void EAW(const uint32 n_iterations, FBufferChannelView dst, const FBufferChannelView w_img, const FBufferChannelView img, const GBufferView gb, const float* var, const EAWParams params, FBufferChannelView pingpong[2]);