#version 330 core

out vec4 FragColor;

in vec2 TexCoord;

uniform sampler2D textureY;
uniform sampler2D textureU;
uniform sampler2D textureV;

void main(){
    vec3 yuv, rgb;
    vec3 yuv2r = vec3(1.164, 0.0, 1.596);
    vec3 yuv2g = vec3(1.164, -0.391, -0.813);
    vec3 yuv2b = vec3(1.164, 2.018, 0.0);
    yuv.x = texture(textureY, TexCoord).r - 0.0625;
    yuv.y = texture(textureU, TexCoord).r - 0.5;
    yuv.z = texture(textureV, TexCoord).r - 0.5;

    rgb.x = dot(yuv, yuv2r);
    rgb.y = dot(yuv, yuv2g);
    rgb.z = dot(yuv, yuv2b);

    FragColor = vec4(rgb, 1.0);
}