<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  Generated on <$_SCRIBE_DATE$>
//
//  directional_light.frag
//  fragment shader
//
//  Created by Sam Gateau on 5/8/2015.
//  Copyright 2014 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

// Everything about deferred buffer
<@include DeferredBuffer.slh@>

<@include DeferredGlobalLight.slh@>

// Everything about shadow
<@include Shadow.slh@>


void main(void) {
    DeferredFragment frag = unpackDeferredFragment(gl_TexCoord[0].st);

    // Eval shadow Texcoord and then Attenuation
    vec4 shadowTexcoord = evalShadowTexcoord(frag.position);
    float shadowAttenuation = evalShadowAttenuation(shadowTexcoord);

    // Light mapped or not ?
    if ((frag.normalVal.a >= 0.45) && (frag.normalVal.a <= 0.55)) {
        gl_FragColor = vec4(evalLightmappedColor(
                                shadowAttenuation,
                                frag.normal,
                                frag.diffuse,
                                frag.specularVal.xyz),
                            1.0);
    } else {
        vec3 color =  evalSkyboxGlobalColor(shadowAttenuation,
                                        frag.position.xyz,
                                        frag.normal,
                                        frag.diffuse,
                                        frag.specular,
                                        frag.gloss);

        gl_FragColor = vec4(color, frag.normalVal.a);
    }
}