binarize.hlsl

#pragma shaderfilter set threshold__description Threshold
#pragma shaderfilter set threshold__default 0.40
uniform float threshold;

#pragma shaderfilter set light_color__description Light Color
#pragma shaderfilter set light_color__default ffffffff
uniform float4 light_color;

#pragma shaderfilter set dark_color__description Dark Color
#pragma shaderfilter set dark_color__default 000000ff
uniform float4 dark_color;

float4 render(float2 uv) {
    float4 image_color = image.Sample(builtin_texture_sampler, uv);

    float avg = (image_color.r + image_color.g + image_color.b) / 3.0;

    bool light = avg > threshold;

    if ( light )
    {
        image_color.rgb = light_color;
    }
    else
    {
        image_color.rgb = dark_color;
    }

    return image_color;
}