#version 330

uniform sampler2D tex1;
uniform sampler2D tex2;

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

vec4 YCoCgToRGB(vec4 ycocg, float alpha)
{
    float Y = ycocg.w;
    float scale = 1.0 / ((31.875 * ycocg.z) + 1.0);
    float Co = (ycocg.x - 0.501960813999176025390625) * scale;
    float Cg = (ycocg.y - 0.501960813999176025390625) * scale;
    float R = (Y + Co) - Cg;
    float G = Y + Cg;
    float B = (Y - Co) - Cg;
    return vec4(R, G, B, alpha);
}

void main()
{
    vec4 yCoCg = texture(tex1, vUV);
    float alpha = texture(tex2, vUV).x;
    vec4 param = yCoCg;
    float param_1 = alpha;
    fragColor = YCoCgToRGB(param, param_1) * vTint;
}