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//////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2018 Leszek Koltunski //
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// //
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// This file is part of Distorted. //
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// //
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// Distorted is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// Distorted is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
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//////////////////////////////////////////////////////////////////////////////////////////////
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precision highp float;
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precision highp int;
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out vec4 fragColor;
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in vec2 v_TexCoordinate;
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uniform vec2 u_Size;
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layout (binding=0, offset=0) uniform atomic_uint u_Counter;
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layout (std430,binding=1) buffer linkedlist
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{
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uint u_Records[];
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};
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//////////////////////////////////////////////////////////////////////////////////////////////
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void main()
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{
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uint pixelX = uint(v_TexCoordinate.x * u_Size.x);
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uint pixelY = uint(v_TexCoordinate.y * u_Size.y);
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uint index = pixelX + pixelY * uint(u_Size.x);
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uint ptr = atomicCounterIncrement(u_Counter) + uint(u_Size.x*u_Size.y);
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u_Records[ptr ] = (v_TexCoordinate.x>0.5?2u:1u);
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u_Records[index] = ptr;
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discard;
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}
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