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Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred/pbralphaF.glsl')
| -rw-r--r-- | indra/newview/app_settings/shaders/class1/deferred/pbralphaF.glsl | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbralphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbralphaF.glsl new file mode 100644 index 0000000000..9d3339f607 --- /dev/null +++ b/indra/newview/app_settings/shaders/class1/deferred/pbralphaF.glsl @@ -0,0 +1,289 @@ +/** + * @file class1\deferred\pbralphaF.glsl + * + * $LicenseInfo:firstyear=2022&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2022, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + */ + +/*[EXTRA_CODE_HERE]*/ + +#define DIFFUSE_ALPHA_MODE_NONE 0 +#define DIFFUSE_ALPHA_MODE_BLEND 1 +#define DIFFUSE_ALPHA_MODE_MASK 2 +#define DIFFUSE_ALPHA_MODE_EMISSIVE 3 + +uniform sampler2D diffuseMap; //always in sRGB space +uniform sampler2D bumpMap; +uniform sampler2D emissiveMap; +uniform sampler2D specularMap; // PBR: Packed: Occlusion, Metal, Roughness + +uniform float metallicFactor; +uniform float roughnessFactor; +uniform vec3 emissiveColor; + +#if defined(HAS_SUN_SHADOW) || defined(HAS_SSAO) +uniform sampler2DRect lightMap; +#endif + +uniform int sun_up_factor; +uniform vec3 sun_dir; +uniform vec3 moon_dir; + +#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND) + #ifdef DEFINE_GL_FRAGCOLOR + out vec4 frag_color; + #else + #define frag_color gl_FragColor + #endif +#else + #ifdef DEFINE_GL_FRAGCOLOR + out vec4 frag_data[4]; + #else + #define frag_data gl_FragData + #endif +#endif + +#ifdef HAS_SHADOW + VARYING vec3 vary_fragcoord; + uniform vec2 screen_res; +#endif + +VARYING vec3 vary_position; +VARYING vec4 vertex_color; +VARYING vec2 vary_texcoord0; +VARYING vec2 vary_texcoord1; +VARYING vec2 vary_texcoord2; +VARYING vec3 vary_normal; +VARYING vec3 vary_tangent; +flat in float vary_sign; + + +#ifdef HAS_ALPHA_MASK +uniform float minimum_alpha; // PBR alphaMode: MASK, See: mAlphaCutoff, setAlphaCutoff() +#endif + +// Lights +// See: LLRender::syncLightState() +uniform vec4 light_position[8]; +uniform vec3 light_direction[8]; // spot direction +uniform vec4 light_attenuation[8]; // linear, quadratic, is omni, unused, See: LLPipeline::setupHWLights() and syncLightState() +uniform vec3 light_diffuse[8]; +uniform vec2 light_deferred_attenuation[8]; // light size and falloff + +vec3 srgb_to_linear(vec3 c); +vec3 linear_to_srgb(vec3 c); + +// These are in deferredUtil.glsl but we can't set: mFeatures.isDeferred to include it +vec3 BRDFLambertian( vec3 reflect0, vec3 reflect90, vec3 c_diff, float specWeight, float vh ); +vec3 BRDFSpecularGGX( vec3 reflect0, vec3 reflect90, float alphaRoughness, float specWeight, float vh, float nl, float nv, float nh ); +void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao); +vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten); +vec3 scaleSoftClipFrag(vec3 l); + +void calcHalfVectors(vec3 lv, vec3 n, vec3 v, out vec3 h, out vec3 l, out float nh, out float nl, out float nv, out float vh, out float lightDist); +float calcLegacyDistanceAttenuation(float distance, float falloff); +vec2 getGGX( vec2 brdfPoint ); +void initMaterial( vec3 diffuse, vec3 packedORM, + out float alphaRough, out vec3 c_diff, out vec3 reflect0, out vec3 reflect90, out float specWeight ); +float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen); +void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv, inout vec3 legacyEnv, + vec3 pos, vec3 norm, float glossiness, float envIntensity); + +void pbrDirectionalLight(inout vec3 colorDiffuse, + inout vec3 colorSpec, + vec3 sunlit, + float scol, + vec3 reflect0, + vec3 reflect90, + vec3 c_diff, + float alphaRough, + float vh, + float nl, + float nv, + float nh); + +void pbrIbl(out vec3 colorDiffuse, // diffuse color output + out vec3 colorSpec, // specular color output, + vec3 radiance, // radiance map sample + vec3 irradiance, // irradiance map sample + float ao, // ambient occlusion factor + float nv, + float perceptualRough, // roughness factor + float gloss, // 1.0 - roughness factor + vec3 reflect0, + vec3 c_diff); + +// lp = light position +// la = linear attenuation, light radius +// fa = falloff +// See: LLRender::syncLightState() +vec3 calcPointLightOrSpotLight(vec3 reflect0, vec3 reflect90, float alphaRough, vec3 c_diff, + vec3 lightColor, vec3 diffuse, vec3 p, vec3 v, vec3 n, vec4 lp, vec3 ln, + float lightSize, float lightFalloff, float is_pointlight, float ambiance) +{ + vec3 intensity = vec3(0); + + vec3 lv = lp.xyz - p; + vec3 h, l; + float nh, nl, nv, vh, lightDist; + calcHalfVectors(lv,n,v,h,l,nh,nl,nv,vh,lightDist); + + float dist = lightDist/lightSize; + + if (dist <= 1.0 && nl > 0.0) + { + float dist_atten = calcLegacyDistanceAttenuation(dist,lightFalloff); + + float specWeight = 1.0; + + lv = normalize(lv); + float spot = max(dot(-ln, lv), is_pointlight); + nl *= spot * spot; + + if (nl > 0.0) + { + vec3 color = vec3(0); + intensity = dist_atten * nl * lightColor; + color += intensity * BRDFLambertian(reflect0, reflect90, c_diff, specWeight, vh); + color += intensity * BRDFSpecularGGX(reflect0, reflect90, alphaRough, specWeight, vh, nl, nv, nh); + return color; + } + } + return intensity; +} + +void main() +{ + vec3 light_dir = (sun_up_factor == 1) ? sun_dir : moon_dir; + vec3 pos = vary_position; + + float scol = 1.0; + float ambocc = 1.0; + + vec3 sunlit; + vec3 amblit; + vec3 additive; + vec3 atten; + calcAtmosphericVars(pos.xyz, light_dir, ambocc, sunlit, amblit, additive, atten, true); + +// IF .mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels; +// vec3 col = vertex_color.rgb * diffuseLookup(vary_texcoord0.xy).rgb; +// else + vec4 albedo = texture2D(diffuseMap, vary_texcoord0.xy).rgba; + albedo.rgb = srgb_to_linear(albedo.rgb); +#ifdef HAS_ALPHA_MASK + if (albedo.a < minimum_alpha) + { + discard; + } +#endif + + vec3 base = vertex_color.rgb * albedo.rgb; + + vec3 vNt = texture2D(bumpMap, vary_texcoord1.xy).xyz*2.0-1.0; + float sign = vary_sign; + vec3 vN = vary_normal; + vec3 vT = vary_tangent.xyz; + + vec3 vB = sign * cross(vN, vT); + vec3 norm = normalize( vNt.x * vT + vNt.y * vB + vNt.z * vN ); + + norm *= gl_FrontFacing ? 1.0 : -1.0; + +#ifdef HAS_SHADOW + vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5; + frag *= screen_res; + scol = sampleDirectionalShadow(pos.xyz, norm.xyz, frag); +#endif + + // RGB = Occlusion, Roughness, Metal + // default values, see LLViewerFetchedTexture::sWhiteImagep since roughnessFactor and metallicFactor are multiplied in + // occlusion 1.0 + // roughness 0.0 + // metal 0.0 + vec3 packedORM = texture2D(specularMap, vary_texcoord2.xy).rgb; // PBR linear packed Occlusion, Roughness, Metal. See: lldrawpoolapha.cpp + + packedORM.g *= roughnessFactor; + packedORM.b *= metallicFactor; + + // emissiveColor is the emissive color factor from GLTF and is already in linear space + vec3 colorEmissive = emissiveColor; + // emissiveMap here is a vanilla RGB texture encoded as sRGB, manually convert to linear + colorEmissive *= srgb_to_linear(texture2D(emissiveMap, vary_texcoord0.xy).rgb); + + vec3 colorDiffuse = vec3(0); + vec3 colorSpec = vec3(0); + + float IOR = 1.5; // default Index Of Refraction 1.5 (dielectrics) + float ao = packedORM.r; + float perceptualRough = packedORM.g; + float metal = packedORM.b; + + vec3 v = -normalize(vary_position.xyz); + vec3 n = norm.xyz; + + vec3 h, l; + float nh, nl, nv, vh, lightDist; + calcHalfVectors(light_dir, n, v, h, l, nh, nl, nv, vh, lightDist); + + vec3 c_diff, reflect0, reflect90; + float alphaRough, specWeight; + initMaterial( base, packedORM, alphaRough, c_diff, reflect0, reflect90, specWeight ); + + float gloss = 1.0 - perceptualRough; + vec3 irradiance = vec3(0); + vec3 radiance = vec3(0); + vec3 legacyenv = vec3(0); + sampleReflectionProbes(irradiance, radiance, legacyenv, pos.xyz, norm.xyz, gloss, 0.0); + irradiance = max(amblit,irradiance) * ambocc; + + pbrIbl(colorDiffuse, colorSpec, radiance, irradiance, ao, nv, perceptualRough, gloss, reflect0, c_diff); + + // Sun/Moon Lighting + if (nl > 0.0 || nv > 0.0) + { + pbrDirectionalLight(colorDiffuse, colorSpec, srgb_to_linear(sunlit), scol, reflect0, reflect90, c_diff, alphaRough, vh, nl, nv, nh); + } + + vec3 col = colorDiffuse + colorEmissive + colorSpec; + + vec3 light = vec3(0); + + // Punctual lights +#define LIGHT_LOOP(i) light += calcPointLightOrSpotLight( reflect0, reflect90, alphaRough, c_diff, light_diffuse[i].rgb, base.rgb, pos.xyz, v, n, light_position[i], light_direction[i].xyz, light_deferred_attenuation[i].x, light_deferred_attenuation[i].y, light_attenuation[i].z, light_attenuation[i].w ); + + LIGHT_LOOP(1) + LIGHT_LOOP(2) + LIGHT_LOOP(3) + LIGHT_LOOP(4) + LIGHT_LOOP(5) + LIGHT_LOOP(6) + LIGHT_LOOP(7) + + col.rgb += light.rgb; + + col.rgb = linear_to_srgb(col.rgb); + col *= atten.r; + col += 2.0*additive; + col = scaleSoftClipFrag(col); + + frag_color = vec4(col,albedo.a * vertex_color.a); +} |