Method Render

Source/Engine/Renderer/GlobalSignDistanceFieldPass.cpp:709–1073

}

bool GlobalSignDistanceFieldPass::Render(RenderContext& renderContext, GPUContext* context, BindingData& result)
{
    // Skip if not supported
    if (checkIfSkipPass())
        return true;
    if (renderContext.List->Scenes.Count() == 0)
        return true;
    auto& sdfData = *renderContext.Buffers->GetCustomBuffer<GlobalSignDistanceFieldCustomBuffer>(TEXT("GlobalSignDistanceField"));

    // Skip if already done in the current frame
    const auto currentFrame = Engine::FrameCount;
    if (sdfData.LastFrameUsed == currentFrame)
    {
        result = sdfData.Result;
        return false;
    }
    sdfData.LastFrameUsed = currentFrame;
    PROFILE_GPU_CPU("Global SDF");

    // Setup options
    int32 resolution, cascadesCount, resolutionMip;
    float distance;
    sdfData.GetOptions(renderContext, resolution, cascadesCount, resolutionMip, distance);
    const float distanceExtent = distance / sdfData.CascadesDistanceScales[cascadesCount - 1];

    // Initialize buffers
    bool reset = false;
    if (sdfData.Cascades.Count() != cascadesCount || sdfData.Resolution != resolution)
    {
        sdfData.Cascades.Resize(cascadesCount);
        sdfData.Resolution = resolution;
        sdfData.FrameIndex = 0;
        reset = true;
        auto desc = GPUTextureDescription::New3D(resolution * cascadesCount, resolution, resolution, GLOBAL_SDF_FORMAT, GPUTextureFlags::ShaderResource | GPUTextureFlags::UnorderedAccess, 1);
        {
            GPUTexture*& texture = sdfData.Texture;
            if (texture && texture->Width() != desc.Width)
            {
                RenderTargetPool::Release(texture);
                sdfData.Texture = nullptr;
            }
            if (!texture)
            {
                texture = RenderTargetPool::Get(desc);
                if (!texture)
                    return true;
                RENDER_TARGET_POOL_SET_NAME(texture, "GlobalSDF.Cascade");
            }
        }
        desc.Width = resolutionMip * cascadesCount;
        desc.Height = desc.Depth = resolutionMip;
        {
            GPUTexture*& texture = sdfData.TextureMip;
            if (texture && texture->Width() != desc.Width)
            {
                RenderTargetPool::Release(texture);
                texture = nullptr;
            }