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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/* TODO Use textureOffset for newest version of GLSL */
#version 130
uniform sampler2D sampler;
uniform vec2 offsets[16];
uniform float kernel[16];
varying vec2 tex_coord;
void main(void)
{
vec4 sum = texture2D(sampler, tex_coord.st) * kernel[0];
for (int i = 1; i < 16; i++) {
sum += texture2D(sampler, tex_coord.st - offsets[i]) * kernel[i];
sum += texture2D(sampler, tex_coord.st + offsets[i]) * kernel[i];
}
gl_FragColor = sum;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */