/usr/share/glmark2/shaders/terrain.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 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | uniform vec3 uAmbientColor;
uniform vec3 uDiffuseColor;
uniform vec3 uSpecularColor;
uniform float uShininess;
uniform float uOpacity;
uniform bool enableDiffuse1;
uniform bool enableDiffuse2;
uniform bool enableSpecular;
uniform sampler2D tDiffuse1;
uniform sampler2D tDiffuse2;
uniform sampler2D tDetail;
uniform sampler2D tNormal;
uniform sampler2D tSpecular;
uniform sampler2D tDisplacement;
uniform float uNormalScale;
uniform vec2 uRepeatOverlay;
uniform vec2 uOffset;
varying vec3 vTangent;
varying vec3 vBinormal;
varying vec3 vNormal;
varying vec2 vUv;
uniform vec3 ambientLightColor;
uniform mat4 viewMatrix;
#define MAX_POINT_LIGHTS 1
//#define USE_FOG
//#define FOG_EXP2
#if MAX_POINT_LIGHTS > 0
uniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];
uniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];
uniform float pointLightDistance[ MAX_POINT_LIGHTS ];
#endif
varying vec3 vViewPosition;
// CHUNK: fog_pars_fragment
#ifdef USE_FOG
uniform vec3 fogColor;
#ifdef FOG_EXP2
uniform float fogDensity;
#else
uniform float fogNear;
uniform float fogFar;
#endif
#endif
void main() {
gl_FragColor = vec4( vec3( 1.0 ), uOpacity );
vec3 specularTex = vec3( 1.0 );
vec2 uvOverlay = uRepeatOverlay * vUv + uOffset;
vec3 normalTex = texture2D( tDetail, uvOverlay ).xyz * 2.0 - 1.0;
normalTex.xy *= uNormalScale;
normalTex = normalize( normalTex );
vec4 colDiffuse1 = texture2D( tDiffuse1, uvOverlay );
vec4 colDiffuse2 = texture2D( tDiffuse2, uvOverlay );
gl_FragColor = gl_FragColor * mix ( colDiffuse1, colDiffuse2, 1.0 - texture2D( tDisplacement, vUv) );
specularTex = texture2D( tSpecular, uvOverlay ).xyz;
mat3 tbn= mat3( vTangent, vBinormal, vNormal );
vec3 finalNormal = tbn * normalTex;
vec3 normal = normalize( finalNormal );
vec3 viewPosition = normalize( vViewPosition );
// point lights
#if MAX_POINT_LIGHTS > 0
vec3 pointDiffuse = vec3( 0.0 );
vec3 pointSpecular = vec3( 0.0 );
for ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {
vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );
vec3 lVector = lPosition.xyz + vViewPosition.xyz;
float lDistance = 1.0;
if ( pointLightDistance[ i ] > 0.0 )
lDistance = 1.0 - min( ( length( lVector ) / pointLightDistance[ i ] ), 1.0 );
lVector = normalize( lVector );
vec3 pointHalfVector = normalize( lVector + viewPosition );
float pointDistance = lDistance;
float pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );
float pointDiffuseWeight = max( dot( normal, lVector ), 0.0 );
float pointSpecularWeight = specularTex.r * pow( pointDotNormalHalf, uShininess );
pointDiffuse += pointDistance * pointLightColor[ i ] * uDiffuseColor * pointDiffuseWeight;
pointSpecular += pointDistance * pointLightColor[ i ] * uSpecularColor * pointSpecularWeight * pointDiffuseWeight;
}
#endif
// all lights contribution summation
vec3 totalDiffuse = vec3( 0.0 );
vec3 totalSpecular = vec3( 0.0 );
#if MAX_POINT_LIGHTS > 0
totalDiffuse += pointDiffuse;
totalSpecular += pointSpecular;
#endif
gl_FragColor.xyz = gl_FragColor.xyz * ( totalDiffuse + ambientLightColor * uAmbientColor + totalSpecular );
//CHUNK: fog_fragment
#ifdef USE_FOG
float depth = gl_FragCoord.z / gl_FragCoord.w;
#ifdef FOG_EXP2
const float LOG2 = 1.442695;
float fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );
fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );
#else
float fogFactor = smoothstep( fogNear, fogFar, depth );
#endif
gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );
#endif
}
|