cbuffer fsConstants : register(b0)
{
    float _33_width : packoffset(c0);
    float _33_height : packoffset(c0.y);
    float _33_minIntensity : packoffset(c0.z);
    float _33_maxIntensity : packoffset(c0.w);
    float _33_uMul : packoffset(c1);
    float _33_vMul : packoffset(c1.y);
};


static float2 vUV;
static float4 fragColor;

struct SPIRV_Cross_Input
{
    float2 vUV : TEXCOORD0;
};

struct SPIRV_Cross_Output
{
    float4 fragColor : SV_Target0;
};

float vignette(float2 p)
{
    float2 uv = p * (1.0f.xx - p.yx);
    float vig = (uv.x * uv.y) * _33_minIntensity;
    return pow(abs(vig), _33_maxIntensity);
}

void frag_main()
{
    float2 param = vUV;
    float a = vignette(param);
    fragColor = float4(0.0f, 0.0f, 0.0f, 1.0f - a);
}

SPIRV_Cross_Output main(SPIRV_Cross_Input stage_input)
{
    vUV = stage_input.vUV;
    frag_main();
    SPIRV_Cross_Output stage_output;
    stage_output.fragColor = fragColor;
    return stage_output;
}