#version 450
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) in vec2 fUv;

layout(location = 0) out vec4 result;

layout(binding = 1) uniform Opt
{
    vec3 color;
    bool preMultiply;
} opt;

layout(binding = 2) uniform sampler2D render;

void main()
{
    result = texture(render, fUv).rgba;

    if (result.rgb == vec3(1.0f, 1.0f, 1.0f))
        result *= vec4(opt.color, 1.0f);


    if (opt.preMultiply)
        result = vec4(result.rgb * result.a, result.a);
}