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/**
* @file gaussianF.glsl
*
* $LicenseInfo:firstyear=2023&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2023, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
out vec4 frag_color;
uniform sampler2D diffuseRect;
uniform float resScale;
// texture direction, will be <1, 0> or <0, 1>
uniform vec2 direction;
in vec2 vary_texcoord0;
// get linear depth value given a depth buffer sample d and znear and zfar values
float linearDepth(float d, float znear, float zfar);
void main()
{
vec3 col = vec3(0,0,0);
float w[9] = float[9]( 0.0002, 0.0060, 0.0606, 0.2417, 0.3829, 0.2417, 0.0606, 0.0060, 0.0002 );
for (int i = 0; i < 9; ++i)
{
vec2 tc = vary_texcoord0 + (i-4)*direction*resScale;
col += texture(diffuseRect, tc).rgb * w[i];
}
frag_color = max(vec4(col, 0.0), vec4(0));
}
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