Method Render

Source/Engine/Renderer/ForwardPass.cpp:74–152

}

void ForwardPass::Render(RenderContext& renderContext, GPUTexture*& input, GPUTexture*& output)
{
    PROFILE_GPU_CPU("Forward");
    auto context = GPUDevice::Instance->GetMainContext();
    auto& view = renderContext.View;
    auto mainCache = renderContext.List;

    context->ResetRenderTarget();
    context->ResetSR();

    // Try to use read-only depth if supported
    GPUTexture* depthBuffer = renderContext.Buffers->DepthBuffer;
    GPUTextureView* depthBufferHandle = depthBuffer->View();
    if (EnumHasAnyFlags(depthBuffer->Flags(), GPUTextureFlags::ReadOnlyDepthView))
        depthBufferHandle = depthBuffer->ViewReadOnlyDepth();

    // Check if there is no objects to render or no resources ready
    auto& forwardList = mainCache->DrawCallsLists[(int32)DrawCallsListType::Forward];
    auto& distortionList = mainCache->DrawCallsLists[(int32)DrawCallsListType::Distortion];
    if ((forwardList.IsEmpty() && distortionList.IsEmpty())
#if USE_EDITOR
        || renderContext.View.Mode == ViewMode::PhysicsColliders
#endif
        )
    {
        // Skip rendering
        Swap(input, output);
        return;
    }
    if (distortionList.IsEmpty() || checkIfSkipPass())
    {
        // Copy frame
        context->SetRenderTarget(output->View());
        context->Draw(input);
    }
    else
    {
        PROFILE_GPU_CPU("Distortion");

        // Peek temporary render target for the distortion pass
        // TODO: render distortion in half-res?
        const int32 width = renderContext.Buffers->GetWidth();
        const int32 height = renderContext.Buffers->GetHeight();
        const int32 distortionWidth = width;
        const int32 distortionHeight = height;
        const auto tempDesc = GPUTextureDescription::New2D(distortionWidth, distortionHeight, PixelFormat::R8G8B8A8_UNorm);
        auto distortionRT = RenderTargetPool::Get(tempDesc);
        RENDER_TARGET_POOL_SET_NAME(distortionRT, "Forward.Distortion");

        // Clear distortion vectors
        context->Clear(distortionRT->View(), Color::Transparent);
        context->SetViewportAndScissors((float)distortionWidth, (float)distortionHeight);
        context->SetRenderTarget(depthBufferHandle, distortionRT->View());

        // Render distortion pass
        view.Pass = DrawPass::Distortion;
        mainCache->ExecuteDrawCalls(renderContext, distortionList);