#version 440

layout(location = 0) in vec2 texCoord;
layout(location = 0) out vec4 fragColor;

layout(std140, binding = 0) uniform buf {
    mat4 matrix;
    mat4 colorMatrix;
    float opacity;
    float width;
} ubuf;

layout(binding = 1) uniform sampler2D plane1Texture;
layout(binding = 2) uniform sampler2D plane2Texture;

void main()
{
    float Y = texture(plane1Texture, texCoord).r;
    float x = texCoord.x/2.;
    float U = texture(plane2Texture, vec2(x, texCoord.y)).r;
    float V = texture(plane2Texture, vec2(x + .5, texCoord.y)).r;
    vec4 color = vec4(Y, U, V, 1.);
    fragColor = ubuf.colorMatrix * color * ubuf.opacity;
}