166 lines
3.7 KiB
GLSL
166 lines
3.7 KiB
GLSL
#version 450
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#ifdef GL_ES
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precision mediump float;
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#endif
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#include "../compiled.glsl"
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#include "../std/gbuffer.glsl"
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#include "../std/math.glsl"
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#include "../std/brdf.glsl"
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#ifdef _Irr
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#include "../std/shirr.glsl"
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#endif
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#ifdef _VoxelGI
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#include "../std/conetrace.glsl"
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#endif
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#ifdef _DFAO
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#include "../std/sdf.glsl"
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#endif
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uniform sampler2D gbufferD;
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uniform sampler2D gbuffer0;
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uniform sampler2D gbuffer1;
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#ifdef _VoxelGI
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//!uniform sampler3D voxels;
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#endif
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uniform float envmapStrength;
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#ifdef _Irr
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//!uniform vec4 shirr[7];
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#endif
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#ifdef _Rad
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uniform sampler2D senvmapRadiance;
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uniform sampler2D senvmapBrdf;
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uniform int envmapNumMipmaps;
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#endif
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#ifdef _SSAO
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uniform sampler2D ssaotex;
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#endif
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#ifdef _Rad
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uniform vec3 eye;
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uniform vec3 eyeLook;
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#endif
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#ifdef _DFAO
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//!uniform sampler3D sdftex;
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#endif
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in vec2 texCoord;
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#ifdef _Rad
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in vec3 viewRay;
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#endif
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out vec4 fragColor;
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void main() {
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vec4 g0 = texture(gbuffer0, texCoord); // Normal.xy, metallic/roughness, depth
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vec3 n;
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n.z = 1.0 - abs(g0.x) - abs(g0.y);
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n.xy = n.z >= 0.0 ? g0.xy : octahedronWrap(g0.xy);
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n = normalize(n);
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vec2 metrough = unpackFloat(g0.b);
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vec4 g1 = texture(gbuffer1, texCoord); // Basecolor.rgb,
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vec3 albedo = surfaceAlbedo(g1.rgb, metrough.x); // g1.rgb - basecolor
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#ifdef _Rad
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#ifdef _InvY // D3D
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float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0;
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#else
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// TODO: Firefox throws transform loop error even when no depth write is performed
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float depth = (1.0 - g0.a) * 2.0 - 1.0;
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#endif
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vec3 p = getPos(eye, eyeLook, viewRay, depth);
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vec3 v = normalize(eye - p.xyz);
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float dotNV = max(dot(n, v), 0.0);
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vec3 f0 = surfaceF0(g1.rgb, metrough.x);
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vec2 envBRDF = texture(senvmapBrdf, vec2(metrough.y, 1.0 - dotNV)).xy;
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// vec2 envBRDF = texture(senvmapBrdf, vec2(dotNV, metrough.y)).xy;
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#endif
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#ifdef _VoxelGI
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#ifdef _VoxelGICam
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const float step = voxelgiDimensions / voxelgiResolution;
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vec3 eyeSnap = ivec3(eye / step) * step;
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vec3 wpos = (p - eyeSnap) / voxelgiDimensions;
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#else
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vec3 wpos = p / voxelgiDimensions;
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#endif
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// vec4 indirectDiffuse = indirectDiffuseLight(wpos, n);
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vec4 indirectDiffuse = traceDiffuse(wpos, n);
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vec3 reflectWorld = reflect(-v, n);
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vec3 indirectSpecular = traceSpecularVoxelCone(wpos, reflectWorld, n, metrough.y * 12.0 + 3.0);
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indirectSpecular *= f0 * envBRDF.x + envBRDF.y;
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fragColor.rgb = indirectDiffuse.rgb * voxelgiDiff * g1.rgb + indirectSpecular * voxelgiSpec;
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float occ = 1.0 - indirectDiffuse.a * 0.2 * voxelgiOcc;
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// fragColor.rgb *= occ;
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// float occ = indirectDiffuse.a;
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#ifdef _SSAO
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fragColor.rgb *= texture(ssaotex, texCoord).r * 0.5 + 0.5;
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#endif
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// float opacity = g1.a;
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// if (opacity < 1.0) fragColor.rgb = mix(indirectRefractiveLight(-v, n, vec3(1.0), opacity, wpos), fragColor.rgb, opacity);
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// return;
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#endif
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// Envmap
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#ifdef _Irr
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vec3 envl = shIrradiance(n, 2.2) / PI;
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#else
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vec3 envl = vec3(1.0);
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#endif
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#ifdef _Rad
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vec3 reflectionWorld = reflect(-v, n);
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float lod = getMipFromRoughness(metrough.y, envmapNumMipmaps);
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vec3 prefilteredColor = textureLod(senvmapRadiance, envMapEquirect(reflectionWorld), lod).rgb;
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#endif
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#ifdef _EnvLDR
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envl.rgb = pow(envl.rgb, vec3(2.2));
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#ifdef _Rad
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prefilteredColor = pow(prefilteredColor, vec3(2.2));
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#endif
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#endif
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envl.rgb *= albedo;
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#ifdef _Rad // Indirect specular
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envl.rgb += prefilteredColor * (f0 * envBRDF.x + envBRDF.y);
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#endif
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#ifdef _SSS
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envl.rgb *= envmapStrength * fract(g1.a);
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#else
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envl.rgb *= envmapStrength * g1.a; // Occlusion
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#endif
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#ifdef _DFGI
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envl.rgb = dfgi(p, n) * albedo;
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#endif
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#ifdef _SSAO
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envl.rgb *= texture(ssaotex, texCoord).r;
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#endif
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#ifdef _DFAO
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envl.rgb *= dfao(p, n);
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#endif
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#ifdef _VoxelGI
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fragColor.rgb += envl * voxelgiEnv * occ;
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#else
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fragColor.rgb = envl;
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#endif
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}
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