<@include gpu/Config.slh@>
<$VERSION_HEADER$>
//  Generated on <$_SCRIBE_DATE$>
//
//  hmd_ui.frag
//  fragment shader
//
//  Created by Sam Gondelman on 9/28/17.
//  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 render-utils/ShaderConstants.h@>

LAYOUT(binding=0) uniform sampler2D hudTexture;

struct HUDData {
    float alpha;
};

LAYOUT_STD140(binding=0) uniform hudBuffer {
    HUDData hud;
};

layout(location=RENDER_UTILS_ATTR_TEXCOORD01) in vec4 _texCoord01;
#define _texCoord0 _texCoord01.xy
#define _texCoord1 _texCoord01.zw

layout(location=0) out vec4 fragColor0;

void main() {
    vec4 color = texture(hudTexture, _texCoord0);
    color.a *= hud.alpha;
    if (color.a <= 0.0) {
        discard;
    }

    fragColor0 = color;
}