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Filmic HDR tone mapping

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This commit is contained in:
RealBadAngel 2016-01-25 13:33:22 +01:00 • committed by kwolekr
parent 180893e79d
commit eb3840a3f8
6 changed files with 101 additions and 14 deletions
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48
client/shaders/nodes_shader/opengl_fragment.glsl
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@ -20,6 +20,38 @@ bool normalTexturePresent = false;
const float e = 2.718281828459;
const float BS = 10.0;
#ifdef ENABLE_TONE_MAPPING
/* Hable's UC2 Tone mapping parameters
A = 0.22;
B = 0.30;
C = 0.10;
D = 0.20;
E = 0.01;
F = 0.30;
W = 11.2;
equation used: ((x * (A * x + C * B) + D * E) / (x * (A * x + B) + D * F)) - E / F
*/
vec3 uncharted2Tonemap(vec3 x)
{
return ((x * (0.22 * x + 0.03) + 0.002) / (x * (0.22 * x + 0.3) + 0.06)) - 0.03334;
}
vec4 applyToneMapping(vec4 color)
{
color = vec4(pow(color.rgb, vec3(2.2)), color.a);
const float gamma = 1.6;
const float exposureBias = 5.5;
color.rgb = uncharted2Tonemap(exposureBias * color.rgb);
// Precalculated white_scale from
//vec3 whiteScale = 1.0 / uncharted2Tonemap(vec3(W));
vec3 whiteScale = vec3(1.036015346);
color.rgb *= whiteScale;
return vec4(pow(color.rgb, vec3(1.0 / gamma)), color.a);
}
#endif
void get_texture_flags()
{
vec4 flags = texture2D(textureFlags, vec2(0.0, 0.0));
@ -160,22 +192,26 @@ void main(void)
color = base.rgb;
#endif
vec4 col = vec4(color.rgb * gl_Color.rgb, 1.0);
#if MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE
float alpha = gl_Color.a;
vec4 col = vec4(color.rgb, alpha);
col *= gl_Color;
if (fogDistance != 0.0) {
float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
alpha = mix(alpha, 0.0, d);
}
gl_FragColor = vec4(col.rgb, alpha);
col = vec4(col.rgb, alpha);
#else
vec4 col = vec4(color.rgb, base.a);
col *= gl_Color;
if (fogDistance != 0.0) {
float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
col = mix(col, skyBgColor, d);
}
gl_FragColor = vec4(col.rgb, base.a);
col = vec4(col.rgb, base.a);
#endif
#ifdef ENABLE_TONE_MAPPING
gl_FragColor = applyToneMapping(col);
#else
gl_FragColor = col;
#endif
}