#version 450 core
in vec2 texPos;
in vec2 distmask[2];
in vec2 pinch[2];
out vec4 fColor;
layout (binding = 1) uniform sampler2D screenTexture;
float x = 1 - min(1, sqrt(distance(distmask[0],vec2(0,0))));
//float x = 1 - min(1, dot(distmask,distmask));
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()
{
    float y = 1 - min(1, sqrt(distance(distmask[1],vec2(0,0))));
    fColor = texture(screenTexture
            , (texPos + x * pinch[0] 
                + y * pinch[1]
                ));
}
//    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
//        ) ;