5 varying vec4 texcoords;
9 gl_Position = gl_Vertex;
10 texcoords = (gl_Vertex + 1.0) / 2.0;
14 /* This shader came from gnome-shell, which is GPLv2+. This copyright
15 * notice was constructed from the git logs of that file plus the
16 * top-level COPYING file, as it did not explicitly include the
20 Copyright (C) 2010 Maxim Ermilov <zaspire@rambler.ru>
22 This program is free software; you can redistribute it and/or modify
23 it under the terms of the GNU General Public License as published by
24 the Free Software Foundation; either version 2 of the License, or
25 (at your option) any later version.
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
32 You should have received a copy of the GNU General Public License
33 along with this program; if not, write to the Free Software
34 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 uniform sampler2D sampler0;
39 uniform float fraction;
42 const float border_max_height = 60.0;
43 varying vec4 texcoords;
45 mat4 contrast = mat4(1.0 + c, 0.0, 0.0, 0.0,
46 0.0, 1.0 + c, 0.0, 0.0,
47 0.0, 0.0, 1.0 + c, 0.0,
49 vec4 off = vec4(0.633, 0.633, 0.633, 0);
53 vec4 color = texture2D(sampler0, texcoords.xy);
54 float y = height * texcoords.y;
56 // To reduce contrast, blend with a mid gray
57 gl_FragColor = color * contrast - off * c;
59 // We only fully dim at a distance of BORDER_MAX_HEIGHT from the edge and
60 // when the fraction is 1.0. For other locations and fractions we linearly
61 // interpolate back to the original undimmed color.
62 gl_FragColor = color + (gl_FragColor - color) * min(y / border_max_height, 1.0);
63 gl_FragColor = color + (gl_FragColor - color) * fraction;
67 uniform int sampler0 0
68 uniform float fraction 1.0
69 uniform float height 60.0
72 relative probe rgb (0.0, 0.0) (1.0, 0.0, 0.0)
73 relative probe rgb (1.0, 0.0) (0.0, 1.0, 0.0)
74 relative probe rgb (0.0, 0.499) (0.90825, 0.15835, 0.15835)
75 relative probe rgb (1.0, 0.499) (0.15835, 0.90825, 0.15835)
76 relative probe rgb (0.0, 1.0) (0.3165, 0.3165, 0.8165)
77 relative probe rgb (1.0, 1.0) (0.8165, 0.8165, 0.8165)