#version 330

// Input vertex attributes (from vertex shader)
in vec3 vertexPos;
in vec2 fragTexCoord;
in vec4 fragColor;

// Input uniform values
uniform sampler2D texture0;
uniform sampler2D texture1;
uniform vec4 colDiffuse;

uniform float divider = 0.5;

out vec4 finalColor;

float float_to_srgb(float l) {
    if (l < 0.0031308) {
        return l * 12.92;
    } else {
        return 1.055 * pow(l, 0.41666) - 0.055;
    }
}

vec4 linear_to_srgb(vec4 linear) {
    vec4 srgb;

    if (linear.r < 0.0031308) {
        srgb.r = linear.r * 12.92;
    } else {
        srgb.r = 1.055 * pow(linear.r, 0.41666) - 0.055;
    }

    if (linear.g < 0.0031308) {
        srgb.g = linear.g * 12.92;
    } else {
        srgb.g = 1.055 * pow(linear.g, 0.41666) - 0.055;
    }

    if (linear.b < 0.0031308) {
        srgb.b = linear.b * 12.92;
    } else {
        srgb.b = 1.055 * pow(linear.b, 0.41666) - 0.055;
    }

    srgb.a = linear.a;

    return srgb;
}

float float_to_linear(float s) {
    if (s <= 0.04045) {
        return s / 12.92;
    } else {
        return pow((s + 0.055) / 1.055, 2.4);
    }
}

vec4 srgb_to_linear(vec4 srgb) {
    return vec4(float_to_linear(srgb.r), float_to_linear(srgb.g), float_to_linear(srgb.b), srgb.a);
}

void main() {
    // // Texel color fetching from texture sampler
    vec4 texelColor0 = texture(texture0, fragTexCoord);
    // vec4 texelColor1 = texture(texture1, fragTexCoord);

    // float x = fract(fragTexCoord.s);
    // float final = smoothstep(divider - 0.1, divider + 0.1, x);

    finalColor = vec4(1, 1, 1, texelColor0.r); //xelColor0;
    // finalColor = vec4(1, 1, 0.0, 1.0);
}