<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  <$_SCRIBE_FILENAME$>
//  Generated on <$_SCRIBE_DATE$>
//
//  Created by Bradley Austin Davis on 2015-02-04
//  Based on fragment shader code from 
//  https://github.com/paulhoux/Cinder-Samples/blob/master/TextRendering/include/text/Text.cpp 
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html

<@if HIFI_USE_TRANSLUCENT or HIFI_USE_FORWARD@>
    <@include DefaultMaterials.slh@>

    <@include GlobalLight.slh@>
    <@if HIFI_USE_TRANSLUCENT@>
        <$declareEvalGlobalLightingAlphaBlended()$>
    <@else@>
        <$declareEvalSkyboxGlobalColor(_SCRIBE_NULL, HIFI_USE_FORWARD)$>
    <@endif@>

    <@include gpu/Transform.slh@>
    <$declareStandardCameraTransform()$>

    layout(location=0) out vec4 _fragColor0;
<@else@>
    <@include DeferredBufferWrite.slh@>
<@endif@>

<@include render-utils/ShaderConstants.h@>

<@include sdf_text3D.slh@>
<$declareEvalSDFSuperSampled()$>

<@if HIFI_USE_TRANSLUCENT or HIFI_USE_FORWARD@>
    layout(location=RENDER_UTILS_ATTR_POSITION_ES) in vec4 _positionES;
<@endif@>
layout(location=RENDER_UTILS_ATTR_NORMAL_WS) in vec3 _normalWS;
layout(location=RENDER_UTILS_ATTR_TEXCOORD01) in vec4 _texCoord01;
#define _texCoord0 _texCoord01.xy
#define _texCoord1 _texCoord01.zw
layout(location=RENDER_UTILS_ATTR_FADE1) flat in vec4 _glyphBounds; // we're reusing the fade texcoord locations here

void main() {
    vec4 color = evalSDFSuperSampled(_texCoord0, _glyphBounds);

<@if HIFI_USE_TRANSLUCENT or HIFI_USE_FORWARD@>
    color.a *= params.color.a;
    if (color.a <= 0.0) {
        discard;
    }
<@endif@>

<@if HIFI_USE_UNLIT@>
    <@if HIFI_USE_TRANSLUCENT or HIFI_USE_FORWARD@>
        _fragColor0 = vec4(color.rgb * isUnlitEnabled(), color.a);
    <@else@>
        packDeferredFragmentUnlit(
            normalize(_normalWS),
            color.a,
            color.rgb);
    <@endif@>
<@else@>
    <@if HIFI_USE_TRANSLUCENT or HIFI_USE_FORWARD@>
        TransformCamera cam = getTransformCamera();
        vec3 fragPosition = _positionES.xyz;

        <@if HIFI_USE_TRANSLUCENT@>
            _fragColor0 = vec4(evalGlobalLightingAlphaBlended(
                cam._viewInverse,
                1.0,
                DEFAULT_OCCLUSION,
                fragPosition,
                normalize(_normalWS),
                color.rgb,
                DEFAULT_FRESNEL,
                DEFAULT_METALLIC,
                DEFAULT_EMISSIVE,
                DEFAULT_ROUGHNESS, color.a),
                color.a);
        <@else@>
            _fragColor0 = vec4(evalSkyboxGlobalColor(
                cam._viewInverse,
                1.0,
                DEFAULT_OCCLUSION,
                fragPosition,
                normalize(_normalWS),
                color.rgb,
                DEFAULT_FRESNEL,
                DEFAULT_METALLIC,
                DEFAULT_ROUGHNESS),
                color.a);
        <@endif@>
    <@else@>
        packDeferredFragment(
            normalize(_normalWS),
            color.a,
            color.rgb,
            DEFAULT_ROUGHNESS,
            DEFAULT_METALLIC,
            DEFAULT_EMISSIVE,
            DEFAULT_OCCLUSION,
            DEFAULT_SCATTERING);
    <@endif@>
<@endif@>
}