// All of the interesting code and settings are in Buffer A.

/// Convert a color from linear RGB to the sRGB color space.
vec3 linear2srgb(vec3 color);

void mainImage(out vec4 fragColor, in vec2 fragCoord) {
  vec2 uv = fragCoord/iResolution.xy;
  vec3 color = texture(iChannel0, uv).rgb;
  fragColor = vec4(linear2srgb(color), 1.0);
}

//////// ================================
//////// VENDOR: Vendored code
//////// ================================

////
//// AUTHOR: unknown
////

vec3 linear2srgb(vec3 linear_rgb) {
    // I believe the first version is technically more accurate,
    // but the difference is usually negligable in practice.
    #if 1
    // copied from somewhere on the internet
    bvec3 cutoff = lessThan(linear_rgb, vec3(0.0031308));
    vec3 higher = vec3(1.055)*pow(linear_rgb, vec3(1.0/2.4)) - vec3(0.055);
    vec3 lower = linear_rgb * vec3(12.92);

    return mix(higher, lower, cutoff);
    // end copied from somewhere on the internet
    #else
    return pow(linear_rgb, vec3(1./2.2));
    #endif
}