#version 450 core
in vec2 texPos;
const int n1 = 15;
in vec2 distmask[n1];
in vec2 pinchr[n1];
in vec2 pinchg[n1];
in vec2 pinchb[n1];
out vec4 fColor;
layout (binding = 1) uniform sampler2D screenTexture;
layout (location = 0) uniform int n;
vec3 toYUV (vec3 rgb)
{ return rgb * mat3
    ( 0.299  , 0.587  , 0.114
    ,-0.14713,-0.28886, 0.436
    , 0.615  ,-0.51499,-0.10001
    ) ;
}
vec3 toRGB (vec3 yuv)
{ return yuv * mat3
    (1, 0      , 1.13983
    ,1,-0.39465,-0.58060
    ,1, 2.03211, 0
    ) ;
}
void main()
{
    vec2 tposr = texPos;
    vec2 tposb = texPos;
    vec2 tposg = texPos;
    for(int i = 0; i < n; ++i)
    {
    float x = 1 - min(1, sqrt(distance(distmask[i],vec2(0,0))));
    tposr += x * pinchr[i];
    tposg += x * pinchg[i];
    tposb += x * pinchb[i];
    }
    fColor.r = texture(screenTexture, tposr).r;
    fColor.g = texture(screenTexture, tposg).g;
    fColor.b = texture(screenTexture, tposb).b;
}
//    fColor = vec4
//        ( toRGB(vec3(  toYUV(texture(screenTexture, texPos).rgb).r
//                , toYUV(texture(screenTexture, (texPos + x*pinch)).rgb).g
//                , toYUV(texture(screenTexture, (texPos + x*(pinch))).rgb).b
//                ) )
//        , 1
//        ) ;