Method PrepareResources

PostProcess/DepthOfField/src/DepthOfField.cpp:175–288

DepthOfField::~DepthOfField() {}

void DepthOfField::PrepareResources(IRenderDevice* pDevice, IDeviceContext* pDeviceContext, PostFXContext* pPostFXContext, FEATURE_FLAGS FeatureFlags)
{
    DEV_CHECK_ERR(pDevice != nullptr, "pDevice must not be null");
    DEV_CHECK_ERR(pPostFXContext != nullptr, "pPostFXContext must not be null");

    const auto& FrameDesc = pPostFXContext->GetFrameDesc();

    m_CurrentFrameIdx = FrameDesc.Index;

    if (m_BackBufferWidth == FrameDesc.Width && m_BackBufferHeight == FrameDesc.Height && m_FeatureFlags == FeatureFlags)
        return;

    for (auto& Iter : m_RenderTech)
        Iter.second.SRB.Release();

    m_BackBufferWidth  = FrameDesc.Width;
    m_BackBufferHeight = FrameDesc.Height;
    m_FeatureFlags     = FeatureFlags;

    RenderDeviceWithCache_N Device{pDevice};

    {
        TextureDesc Desc;
        Desc.Name      = "DepthOfField::CircleOfConfusion";
        Desc.Type      = RESOURCE_DIM_TEX_2D;
        Desc.Width     = m_BackBufferWidth;
        Desc.Height    = m_BackBufferHeight;
        Desc.Format    = TEX_FORMAT_R16_FLOAT;
        Desc.BindFlags = BIND_SHADER_RESOURCE | BIND_RENDER_TARGET;
        m_Resources.Insert(RESOURCE_IDENTIFIER_CIRCLE_OF_CONFUSION_TEXTURE, Device.CreateTexture(Desc));
    }

    if (FeatureFlags & FEATURE_FLAG_ENABLE_TEMPORAL_SMOOTHING)
    {
        for (Uint32 TextureIdx = RESOURCE_IDENTIFIER_CIRCLE_OF_CONFUSION_TEMPORAL_TEXTURE0; TextureIdx <= RESOURCE_IDENTIFIER_CIRCLE_OF_CONFUSION_TEMPORAL_TEXTURE1; ++TextureIdx)
        {
            TextureDesc Desc;
            Desc.Name          = "DepthOfField::TemporalCircleOfConfusion";
            Desc.Type          = RESOURCE_DIM_TEX_2D;
            Desc.Width         = m_BackBufferWidth;
            Desc.Height        = m_BackBufferHeight;
            Desc.Format        = TEX_FORMAT_R16_FLOAT;
            Desc.BindFlags     = BIND_SHADER_RESOURCE | BIND_RENDER_TARGET;
            auto  pTexture     = Device.CreateTexture(Desc);
            float ClearColor[] = {0.0, 0.0, 0.0, 0.0};
            pPostFXContext->ClearRenderTarget({nullptr, nullptr, pDeviceContext}, pTexture, ClearColor);
            m_Resources.Insert(TextureIdx, pTexture);
        }
    }

    TEXTURE_FORMAT TextureCoCFormat = TEX_FORMAT_R16_FLOAT;
    if (pDevice->GetTextureFormatInfo(TEX_FORMAT_R16_UNORM).Supported)
        TextureCoCFormat = TEX_FORMAT_R16_UNORM;

    for (Uint32 TextureIdx = RESOURCE_IDENTIFIER_CIRCLE_OF_CONFUSION_DILATION_TEXTURE_MIP0; TextureIdx <= RESOURCE_IDENTIFIER_CIRCLE_OF_CONFUSION_DILATION_TEXTURE_LAST_MIP; ++TextureIdx)
    {
        TextureDesc Desc;
        Desc.Name      = "DepthOfField::DilationCircleOfConfusion";