/usr/share/glmark2/shaders/terrain-normalmap.frag is in glmark2-data 2014.03+git20150611.fa71af2d-0ubuntu2.
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 | uniform float height;
uniform vec2 resolution;
uniform sampler2D heightMap;
varying vec2 vUv;
void main()
{
float val = texture2D( heightMap, vUv ).x;
float valU = texture2D( heightMap, vUv + vec2( 1.0 / resolution.x, 0.0 ) ).x;
float valV = texture2D( heightMap, vUv + vec2( 0.0, 1.0 / resolution.y ) ).x;
gl_FragColor = vec4( ( 0.5 * normalize( vec3( val - valU, val - valV, height ) ) + 0.5 ), 1.0 );
}
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