#version 430

layout (binding = 0) uniform sampler2D colorSamp;
layout (binding = 1) uniform sampler2D ssaoSamp;
layout (binding = 2) uniform sampler2D shadowSamp;
layout (binding = 3) uniform sampler2D worldNormalSamp;

uniform bool ssao;
uniform bool shadows;
uniform float bump;

in vec2 varTex;

out vec4 color;

const vec3 light = vec3(-0.280166, -0.573576, -0.769751);

void main() {
    if(ssao) {
        color = vec4(texture(colorSamp, varTex).xyz * (texture(ssaoSamp, varTex).r + 0.5), 1.0);
    } else {
        color = vec4(texture(colorSamp, varTex).xyz, 1.0);
    }
    if(shadows) {
        float f = texture(shadowSamp, varTex).r;
        color *= f * 0.5 + 0.5;
    }
    float diffuseLight = max(dot(texture(worldNormalSamp, varTex).xyz, -light), 0.0) * bump + (1.0 - bump);
    color *= diffuseLight;
}