float4x4 WorldViewProj;

texture Base  <
    string UIName =  "Base Texture";
    string ResourceType = "2D";
>;

sampler2D BaseTexture = sampler_state {
    Texture = <Base>;
    AddressU = Wrap;
    AddressV = Wrap;
};

texture Overlay  <
    string UIName =  "Overlay Texture";
    string ResourceType = "2D";
>;

sampler2D OverlayTexture = sampler_state {
    Texture = <Overlay>;
    AddressU = Wrap;
    AddressV = Wrap;
};


texture PreRender : RENDERCOLORTARGET
    <
    string Format = "X8R8G8B8" ;
    >;

sampler2D PreRenderSampler = sampler_state {
    Texture = <PreRender>;
};

struct VS_INPUT
{
    float4 Position : POSITION0;
    float2 Tex      : TEXCOORD0;

};

struct VS_OUTPUT
{
    float4 Position : POSITION0;
    float2 Tex      : TEXCOORD0;
};

VS_OUTPUT cap_mainVS(VS_INPUT Input)
{
    VS_OUTPUT Output;
    Output.Position = mul( Input.Position, WorldViewProj );
    Output.Tex = Input.Tex;
    return( Output );
}

float4 cap_mainPS(float2 tex: TEXCOORD0, float2 pos: VPOS) : COLOR
{
    // пришлось захардкодить разрешение экрана, т.к. лезть в основной код лень
    // особенно без наличия MSVS 2012
    pos /= float2(1920.0f, 1080.0f);
    pos = pos * 2.0f - 1.0f;
    float d = distance(pos, float2(0.f, 0.f));
    float2 rg;
    sincos(d, rg.r, rg.g); // можно было бы сделать через look-up table, но сэкономим одно сэмплирование из текстур :)
    return tex2D(BaseTexture, tex) * float4(abs(rg), 0.0f, 1.0f);
}

///////////////////////////////////////////////////////

struct Overlay_VS_INPUT
{
    float4 Position : POSITION0;
    float2 Texture1 : TEXCOORD0;
};

struct Overlay_VS_OUTPUT
{
    float4 Position : POSITION0;
    float2 Texture1 : TEXCOORD0;
    float2 Texture2 : TEXCOORD1;

};

Overlay_VS_OUTPUT over_mainVS(Overlay_VS_INPUT Input)
{
    Overlay_VS_OUTPUT Output;

    Output.Position = mul( Input.Position, WorldViewProj );
    Output.Texture1 = Input.Texture1;
    Output.Texture2 = Output.Position.xy*float2(0.5,0.5) + float2(0.5,0.5);

    return( Output );
}

float4 over_mainPS(float2 tex :TEXCOORD0, float2 pos :TEXCOORD1) : COLOR
{
    vector tmp = tex2D(PreRenderSampler, tex);
    return tmp;
}


technique technique0
{
    pass p0
    {
        CullMode = None;
        VertexShader = compile vs_3_0 cap_mainVS();
        PixelShader = compile ps_3_0 cap_mainPS();
    }

    pass p1
    {
        CullMode = None;
        VertexShader = compile vs_3_0 over_mainVS();
        PixelShader = compile ps_3_0 over_mainPS();
    }
}