<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  Generated on <$_SCRIBE_DATE$>
//
//  directional_light_shadow.frag
//  fragment shader
//
//  Created by Zach Pomerantz on 1/18/2016.
//  Copyright 2016 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
//

<@include Shadow.slh@>
<@include DeferredBuffer.slh@>
<@include DeferredGlobalLight.slh@>

<$declareEvalLightmappedColor()$>
<$declareEvalAmbientGlobalColor()$>

in vec2 _texCoord0;
out vec4 _fragColor;

void main(void) {
    DeferredTransform deferredTransform = getDeferredTransform();
    DeferredFragment frag = unpackDeferredFragment(deferredTransform, _texCoord0);

    vec4 worldPos = deferredTransform.viewInverse * vec4(frag.position.xyz, 1.0);
    float shadowAttenuation = evalShadowAttenuation(worldPos);

    // Light mapped or not ?
    if (frag.mode == LIGHT_MAPPED) {
         vec3 color = evalLightmappedColor(
                        deferredTransform.viewInverse,
                        shadowAttenuation,
                        frag.obscurance,
                        frag.normal,
                        frag.diffuse,
                        frag.specularVal.xyz);
        _fragColor = vec4(color, 1.0);
    } else {
        vec3 color =  evalAmbientGlobalColor(
                        deferredTransform.viewInverse,
                        shadowAttenuation,
                        frag.obscurance,
                        frag.position.xyz,
                        frag.normal,
                        frag.diffuse,
                        frag.specular,
                        frag.gloss);
        _fragColor = vec4(color, frag.normalVal.a);
    }
}