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Cleanup tonemap shader

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This commit is contained in:
Vincent Lejeune 2014-12-07 21:27:26 +01:00
parent a094bbae19
commit a320eebece
1 changed files with 0 additions and 21 deletions
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21
data/shaders/tonemap.frag
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@ -1,9 +1,4 @@
// From http://www.ceng.metu.edu.tr/~akyuz/files/hdrgpu.pdf
uniform sampler2D tex;
uniform sampler2D logluminancetex;
uniform float exposure = .09;
uniform float Lwhite = 1.;
uniform float vignette_weight;
out vec4 FragColor;
@ -11,25 +6,10 @@ out vec4 FragColor;
vec3 getCIEYxy(vec3 rgbColor);
vec3 getRGBFromCIEXxy(vec3 YxyColor);
float delta = .0001;
float saturation = 1.;
void main()
{
vec2 uv = gl_FragCoord.xy / screen;
vec4 col = texture(tex, uv);
float avgLw = textureLod(logluminancetex, uv, 10.).x;
avgLw = max(exp(avgLw) - delta, delta);
vec3 Cw = getCIEYxy(col.xyz);
float Lw = Cw.y;
/* Reinhard, for reference */
// float L = Lw * exposure / avgLw;
// float Ld = L * (1. + L / (Lwhite * Lwhite));
// Ld /= (1. + L);
// FragColor = vec4(Ld * pow(col.xyz / Lw, vec3(saturation)), 1.);
// Uncharted2 tonemap with Auria's custom coefficients
vec4 perChannel = (col * (6.9 * col + .5)) / (col * (5.2 * col + 1.7) + 0.06);
@ -38,7 +18,6 @@ void main()
vec2 inside = uv - 0.5;
float vignette = 1. - dot(inside, inside) * vignette_weight;
vignette = clamp(pow(vignette, 0.8), 0., 1.);
//vignette = clamp(vignette + vignette - 0.5, 0., 1.15);
FragColor = vec4(perChannel.xyz * vignette, col.a);
}