/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */

#include <scenesrg.srgi>
#include <viewsrg.srgi>

#include <Atom/Features/PostProcessing/FullscreenVertex.azsli>
#include <Atom/Features/PostProcessing/FullscreenPixelInfo.azsli>
#include <Atom/Features/SrgSemantics.azsli>
#include "ReflectionScreenSpaceBlurCommon.azsli"

ShaderResourceGroup PassSrg : SRG_PerPass
{
    RWTexture2D<float4> m_input;
    RWTexture2D<float4> m_output;
    uint m_imageWidth;
    uint m_imageHeight;
    float m_outputScale;
}

#include <Atom/RPI/ShaderResourceGroups/DefaultDrawSrg.azsli>

// Pixel Shader
PSOutput MainPS(VSOutput IN)
{
    // horizontal blur uses coordinates from the mip-level render target
    float3 result = GaussianFilter(IN.m_position.xy, TexelOffsetsH, PassSrg::m_input);

    PSOutput OUT;
    OUT.m_color = float4(result, 1.0f);
    return OUT;
}