// Copyright (c) 2022 Advanced Micro Devices, Inc. All rights reserved.
//
// This file is part of the AMD Render Pipeline Shaders SDK which is
// released under the AMD INTERNAL EVALUATION LICENSE.
//
// See file LICENSE.RTF for full license details.

node Geometry(rtv offscreenRenderTarget : SV_Target0, uint useMSAA);
graphics node GeometryMSAA(rtv offscreenRTMSAA : SV_Target0, uint useMSAA, [writeonly(resolve)] texture offscreenRT : SV_ResolveTarget0);
graphics node Quads(rtv backBuffer : SV_Target0, srv offscreenRenderTarget);

export void render_to_texture([readonly(present)] texture backbuffer, bool useMultisampling)
{
    ResourceDesc backbufferDesc = backbuffer.desc();
    uint32_t width = (uint32_t)backbufferDesc.Width;
    uint32_t height = (uint32_t)backbufferDesc.Height;
    RPS_FORMAT backbufferFormat = backbufferDesc.Format;

    // create the resources we need for the offscreen rendering, as well as a view into it.

    texture offscreenRT = create_tex2d(backbufferFormat, width, height);

    // clear and then render geometry to offscreen target
    if (useMultisampling)
    {
        texture offscreenRTMSAA = create_tex2d(backbufferFormat, width, height, 1, 1, 1, 4);

        clear(offscreenRTMSAA, float4(0.0, 0.4, 0.2, 1.0));
        GeometryMSAA(offscreenRTMSAA, useMultisampling, offscreenRT);
    }
    else
    {
        clear(offscreenRT, float4(0.0, 0.2, 0.4, 1.0));
        Geometry(offscreenRT, false);
    }

    // render to the back buffer.
    Quads(backbuffer, offscreenRT);
}