/usr/lib/libreoffice/program/opengl/basicFragmentShader.glsl is in libreoffice-ogltrans 1:6.0.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | /* -*- 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/.
*/
#version 120
uniform sampler2D slideTexture;
varying vec2 v_texturePosition;
varying vec3 v_normal;
void main() {
vec3 lightVector = vec3(0.0, 0.0, 1.0);
float light = max(dot(lightVector, v_normal), 0.0);
vec4 fragment = texture2D(slideTexture, v_texturePosition);
vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
gl_FragColor = mix(black, fragment, light);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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