test_temporal.rpsl

// Copyright (c) 2024 Advanced Micro Devices, Inc.
//
// This file is part of the AMD Render Pipeline Shaders SDK which is
// released under the MIT LICENSE.
//
// See file LICENSE.txt for full license details.

graphics node Triangle(rtv renderTarget : SV_Target0, uint triangleId);

node CopySrcDummy([readonly(copy)] texture temporal);

export void main([readonly(present)] texture backbuffer, uint frameIndex)
{
    ResourceDesc backbufferDesc = backbuffer.desc();

    uint32_t   width  = (uint32_t)backbufferDesc.Width;
    uint32_t   height = backbufferDesc.Height;
    RPS_FORMAT format = backbufferDesc.Format;

    uint tempLayers = 3;

    texture history = create_tex2d(format, width, height, 1, 1, tempLayers);
    
    if (frameIndex < tempLayers){
        // clear and then render geometry to back buffer
        clear(backbuffer, float4(0.0, 0.2, 0.4, 1.0));
        clear(history, float4(0.0, 0.2, 0.4, 1.0));

        Triangle(backbuffer, 0);
        Triangle(history, 0);

        // Add an empty node call with a dummy access, so this slice can be accessed as a copy source
        // already. Note: This is a temporary solution and will be changed in the future.
        CopySrcDummy(history);
    }
    else
    {
        // Copy from previous to current slice.
        copy_texture(history.temporal(0), history.temporal(1));

        // Copy to backbuffer from 2 frames ago.
        copy_texture(backbuffer, history.temporal(2));
    }
}