132 lines
3 KiB
GLSL
132 lines
3 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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// octahedronWrap()
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// unpackFloat()
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#include "../std/math.glsl"
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// envMapEquirect()
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#include "../std/brdf.glsl"
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// ...
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#ifdef _Probes
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#include "../std/shirr_probe.glsl"
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#else
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#include "../std/shirr.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 _Probes
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//!uniform float shirr[27 * 6]; // Maximum of 6 SH sets
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#else
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//!uniform float shirr[27];
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#endif
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uniform float envmapStrength;
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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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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, mask
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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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#ifdef _Rad
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float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0;
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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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#endif
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// Indirect
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#ifdef _Probes
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float probeFactor = g0.a; // mask_probe
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float probeID = floor(probeFactor);
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float probeFract = fract(probeFactor);
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vec3 indirect;
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#ifdef _Rad
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float lod = getMipFromRoughness(metrough.y, envmapNumMipmaps);
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vec3 reflectionWorld = reflect(-v, n);
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vec2 envCoordRefl = envMapEquirect(reflectionWorld);
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vec3 prefilteredColor = textureLod(senvmapRadiance, envCoordRefl, lod).rgb;
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#endif
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// Global probe only
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if (probeID == 0.0) {
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indirect = shIrradiance(n, 2.2, 0) / PI;
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}
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// fract 0 = local probe, 1 = global probe
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else {
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indirect = (shIrradiance(n, 2.2, int(probeID)) / PI) * (1.0 - probeFract);
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//prefilteredColor /= 4.0;
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if (probeFract > 0.0) {
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indirect += (shIrradiance(n, 2.2, 0) / PI) * (probeFract);
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}
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}
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#else // No probes
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vec3 indirect = shIrradiance(n, 2.2) / PI;
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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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#endif
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#ifdef _EnvLDR
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indirect = pow(indirect, 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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vec4 g1 = texture(gbuffer1, texCoord); // Basecolor.rgb, occlusion
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vec3 albedo = surfaceAlbedo(g1.rgb, metrough.x); // g1.rgb - basecolor
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indirect *= albedo;
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#ifdef _Rad
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// Indirect specular
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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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indirect += prefilteredColor * (f0 * envBRDF.x + envBRDF.y);
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#endif
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indirect = indirect * envmapStrength;// * lightColor;
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indirect = indirect * g1.a; // Occlusion
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#ifdef _SSAO
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indirect *= texture(ssaotex, texCoord).r; // SSAO
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#endif
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fragColor.rgb = indirect;
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}
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