mirror of
https://github.com/X0nk/Bliss-Shader.git
synced 2025-01-05 17:13:28 +08:00
108 lines
3.2 KiB
GLSL
108 lines
3.2 KiB
GLSL
#version 120
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//#extension GL_EXT_gpu_shader4 : disable
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#include "/lib/settings.glsl"
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#include "/lib/res_params.glsl"
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flat varying vec2 tempOffsets;
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flat varying float exposure;
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flat varying float avgBrightness;
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flat varying float rodExposure;
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flat varying float avgL2;
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flat varying float centerDepth;
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uniform sampler2D colortex4;
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uniform sampler2D colortex6;
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uniform sampler2D depthtex0;
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uniform mat4 gbufferModelViewInverse;
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uniform vec3 sunPosition;
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uniform vec2 texelSize;
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uniform float sunElevation;
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uniform float eyeAltitude;
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uniform float near;
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uniform float far;
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uniform float frameTime;
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uniform int frameCounter;
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uniform float rainStrength;
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// uniform int worldTime;
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vec3 sunVec = normalize(mat3(gbufferModelViewInverse) *sunPosition);
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#include "/lib/sky_gradient.glsl"
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#include "/lib/util.glsl"
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#include "/lib/ROBOBO_sky.glsl"
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float luma(vec3 color) {
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return dot(color,vec3(0.21, 0.72, 0.07));
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}
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//Low discrepancy 2D sequence, integration error is as low as sobol but easier to compute : http://extremelearning.com.au/unreasonable-effectiveness-of-quasirandom-sequences/
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vec2 R2_samples(int n){
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vec2 alpha = vec2(0.75487765, 0.56984026);
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return fract(alpha * n);
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}
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float tanh(float x){
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return (exp(x) - exp(-x))/(exp(x) + exp(-x));
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}
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float ld(float depth) {
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return (2.0 * near) / (far + near - depth * (far - near)); // (-depth * (far - near)) = (2.0 * near)/ld - far - near
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}
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uniform float nightVision;
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void main() {
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gl_Position = ftransform()*0.5+0.5;
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gl_Position.xy = gl_Position.xy*vec2(18.+258*2,258.)*texelSize;
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gl_Position.xy = gl_Position.xy*2.-1.0;
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//////////////////////////////
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/// --- EXPOSURE STUFF --- ///
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//////////////////////////////
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float avgLuma = 0.0;
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float m2 = 0.0;
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int n=100;
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vec2 clampedRes = max(1.0/texelSize,vec2(1920.0,1080.));
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float avgExp = 0.0;
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float avgB = 0.0;
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vec2 resScale = vec2(1920.,1080.)/clampedRes;
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const int maxITexp = 50;
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float w = 0.0;
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for (int i = 0; i < maxITexp; i++){
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vec2 ij = R2_samples((frameCounter%2000)*maxITexp+i);
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vec2 tc = 0.5 + (ij-0.5) * 0.7;
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vec3 sp = texture2D(colortex6,tc/16. * resScale+vec2(0.375*resScale.x+4.5*texelSize.x,.0)).rgb;
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avgExp += log(luma(sp));
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avgB += log(min(dot(sp,vec3(0.07,0.22,0.71)),8e-2));
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}
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avgExp = exp(avgExp/maxITexp);
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avgB = exp(avgB/maxITexp);
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avgBrightness = clamp(mix(avgExp,texelFetch2D(colortex4,ivec2(10,37),0).g,0.95),0.00003051757,65000.0);
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float L = max(avgBrightness,1e-8);
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float keyVal = 1.03-2.0/(log(L*4000/150.*8./3.0+1.0)/log(10.0)+2.0);
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float expFunc = 0.5+0.5*tanh(log(L));
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float targetExposure = 0.18/log2(L*2.5+1.045)*0.62;
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avgL2 = clamp(mix(avgB,texelFetch2D(colortex4,ivec2(10,37),0).b,0.985),0.00003051757,65000.0);
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float targetrodExposure = max(0.012/log2(avgL2+1.002)-0.1,0.0)*1.2;
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exposure = max(targetExposure*EXPOSURE_MULTIPLIER, 0);
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float currCenterDepth = ld(texture2D(depthtex0, vec2(0.5)).r);
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centerDepth = mix(sqrt(texelFetch2D(colortex4,ivec2(14,37),0).g/65000.0), currCenterDepth, clamp(DoF_Adaptation_Speed*exp(-0.016/frameTime+1.0)/(6.0+currCenterDepth*far),0.0,1.0));
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centerDepth = centerDepth * centerDepth * 65000.0;
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rodExposure = targetrodExposure;
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#ifndef AUTO_EXPOSURE
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exposure = Manual_exposure_value;
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rodExposure = clamp(log(Manual_exposure_value*2.0+1.0)-0.1,0.0,2.0);
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#endif
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} |