<@include gpu/Config.slh@>
<$VERSION_HEADER$>
// <$_SCRIBE_FILENAME$>
//  Generated on <$_SCRIBE_DATE$>
//
//  Created by Olivier Prat on 06/05/17.
//  Copyright 2017 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 DeferredBufferWrite.slh@>
<@include graphics/Material.slh@>
<@include graphics/MaterialTextures.slh@>
<@include render-utils/ShaderConstants.h@>

<$declareMaterialTextures(ALBEDO, ROUGHNESS, _SCRIBE_NULL, METALLIC)$>
<$declareMaterialLightmap()$>

<@include Fade.slh@>
<$declareFadeFragment()$>

layout(location=RENDER_UTILS_ATTR_TEXCOORD01) in vec4 _texCoord01;
#define _texCoord0 _texCoord01.xy
#define _texCoord1 _texCoord01.zw
layout(location=RENDER_UTILS_ATTR_NORMAL_WS) in vec3 _normalWS;
layout(location=RENDER_UTILS_ATTR_COLOR) in vec4 _color;
layout(location=RENDER_UTILS_ATTR_POSITION_WS) in vec4 _positionWS;

void main(void) {
    vec3 fadeEmissive;
    FadeObjectParams fadeParams;
    <$fetchFadeObjectParams(fadeParams)$>
    applyFade(fadeParams, _positionWS.xyz, fadeEmissive);

    Material mat = getMaterial();
    BITFIELD matKey = getMaterialKey(mat);
    <$fetchMaterialTexturesCoord0(matKey, _texCoord0, albedoTex, roughnessTex, _SCRIBE_NULL, metallicTex)$>
    <$fetchMaterialTexturesCoord1(matKey, _texCoord1, _SCRIBE_NULL, lightmap)$>

    vec3 albedo = getMaterialAlbedo(mat);
    <$evalMaterialAlbedo(albedoTex, albedo, matKey, albedo)$>;
    albedo *= _color.rgb;

    float roughness = getMaterialRoughness(mat);
    <$evalMaterialRoughness(roughnessTex, roughness, matKey, roughness)$>;

    float metallic = getMaterialMetallic(mat);
    <$evalMaterialMetallic(metallicTex, metallic, matKey, metallic)$>;

    packDeferredFragmentLightmap(
        normalize(_normalWS), 
        evalOpaqueFinalAlpha(getMaterialOpacity(mat), albedoTex.a),
        albedo,
        roughness,
        metallic,
        lightmap + fadeEmissive);
}