kraken/standard_assets/shaders/volumetric_fog_downsampled_osx.fsh

//
//  volumetric_fog_downsampled_osx.fsh
//  Kraken Engine
//
//  Copyright 2021 Kearwood Gilbert. All rights reserved.
//  
//  Redistribution and use in source and binary forms, with or without modification, are
//  permitted provided that the following conditions are met:
//  
//  1. Redistributions of source code must retain the above copyright notice, this list of
//  conditions and the following disclaimer.
//  
//  2. Redistributions in binary form must reproduce the above copyright notice, this list
//  of conditions and the following disclaimer in the documentation and/or other materials
//  provided with the distribution.
//  
//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
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//  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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//  
//  The views and conclusions contained in the software and documentation are those of the
//  authors and should not be interpreted as representing official policies, either expressed
//  or implied, of Kearwood Gilbert.
//


out vec4 colorOut;

in mediump vec4        shadowMapCoord1;
uniform sampler2DShadow     shadowTexture1;
uniform lowp sampler2D      depthFrame;
uniform mediump vec4        viewport;
uniform mediump vec3        light_color;

void main()
{
    if(gl_FragCoord.z > texture(depthFrame, vec2(gl_FragCoord.xy / viewport.zw)).r) discard;

    colorOut = vec4(light_color, 1.0) * shadow2DProj(shadowTexture1, shadowMapCoord1);
}