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Diffstat (limited to 'indra/newview/app_settings/shaders/class3/deferred/materialF.glsl')
| -rw-r--r-- | indra/newview/app_settings/shaders/class3/deferred/materialF.glsl | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl new file mode 100644 index 0000000000..c5b1937cfb --- /dev/null +++ b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl @@ -0,0 +1,455 @@ +/** +* @file materialF.glsl +* +* $LicenseInfo:firstyear=2007&license=viewerlgpl$ +* Second Life Viewer Source Code +* Copyright (C) 2007, 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]*/ + +//class1/deferred/materialF.glsl + +// This shader is used for both writing opaque/masked content to the gbuffer and writing blended content to the framebuffer during the alpha pass. + +#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 float emissive_brightness; // fullbright flag, 1.0 == fullbright, 0.0 otherwise +uniform int sun_up_factor; + +#ifdef WATER_FOG +vec4 applyWaterFogView(vec3 pos, vec4 color); +#endif + +vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten); +vec3 scaleSoftClipFrag(vec3 l); + +vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten); +vec3 fullbrightScaleSoftClip(vec3 light); + +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 srgb_to_linear(vec3 cs); +vec3 linear_to_srgb(vec3 cs); + +#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND) + +#ifdef DEFINE_GL_FRAGCOLOR +out vec4 frag_color; +#else +#define frag_color gl_FragColor +#endif + +#ifdef HAS_SUN_SHADOW +float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen); +#endif + +#ifdef HAS_REFLECTION_PROBES +void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv, inout vec3 legacyenv, + vec3 pos, vec3 norm, float glossiness, float envIntensity); +void applyGlossEnv(inout vec3 color, vec3 glossenv, vec4 spec, vec3 pos, vec3 norm); +void applyLegacyEnv(inout vec3 color, vec3 legacyenv, vec4 spec, vec3 pos, vec3 norm, float envIntensity); +#endif + +uniform samplerCube environmentMap; +uniform sampler2D lightFunc; + +// Inputs +uniform vec4 morphFactor; +uniform vec3 camPosLocal; +uniform mat3 env_mat; + +uniform vec3 sun_dir; +uniform vec3 moon_dir; +VARYING vec2 vary_fragcoord; + +VARYING vec3 vary_position; + +uniform mat4 proj_mat; +uniform mat4 inv_proj; +uniform vec2 screen_res; + +uniform vec4 light_position[8]; +uniform vec3 light_direction[8]; +uniform vec4 light_attenuation[8]; +uniform vec3 light_diffuse[8]; + +float getAmbientClamp(); + +vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spec, vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight, inout float glare, float ambiance) +{ + // SL-14895 inverted attenuation work-around + // This routine is tweaked to match deferred lighting, but previously used an inverted la value. To reconstruct + // that previous value now that the inversion is corrected, we reverse the calculations in LLPipeline::setupHWLights() + // to recover the `adjusted_radius` value previously being sent as la. + float falloff_factor = (12.0 * fa) - 9.0; + float inverted_la = falloff_factor / la; + // Yes, it makes me want to cry as well. DJH + + vec3 col = vec3(0); + + //get light vector + vec3 lv = lp.xyz - v; + + //get distance + float dist = length(lv); + float da = 1.0; + + dist /= inverted_la; + + if (dist > 0.0 && inverted_la > 0.0) + { + //normalize light vector + lv = normalize(lv); + + //distance attenuation + float dist_atten = clamp(1.0 - (dist - 1.0*(1.0 - fa)) / fa, 0.0, 1.0); + dist_atten *= dist_atten; + dist_atten *= 2.0f; + + if (dist_atten <= 0.0) + { + return col; + } + + // spotlight coefficient. + float spot = max(dot(-ln, lv), is_pointlight); + da *= spot*spot; // GL_SPOT_EXPONENT=2 + + //angular attenuation + da *= dot(n, lv); + + float lit = 0.0f; + + float amb_da = ambiance; + if (da >= 0) + { + lit = max(da * dist_atten, 0.0); + col = lit * light_col * diffuse; + amb_da += (da*0.5 + 0.5) * ambiance; + } + amb_da += (da*da*0.5 + 0.5) * ambiance; + amb_da *= dist_atten; + amb_da = min(amb_da, 1.0f - lit); + + // SL-10969 need to see why these are blown out + //col.rgb += amb_da * light_col * diffuse; + + if (spec.a > 0.0) + { + //vec3 ref = dot(pos+lv, norm); + vec3 h = normalize(lv + npos); + float nh = dot(n, h); + float nv = dot(n, npos); + float vh = dot(npos, h); + float sa = nh; + float fres = pow(1 - dot(h, npos), 5)*0.4 + 0.5; + + float gtdenom = 2 * nh; + float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh)); + + if (nh > 0.0) + { + float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt / (nh*da); + vec3 speccol = lit*scol*light_col.rgb*spec.rgb; + speccol = clamp(speccol, vec3(0), vec3(1)); + col += speccol; + + float cur_glare = max(speccol.r, speccol.g); + cur_glare = max(cur_glare, speccol.b); + glare = max(glare, speccol.r); + glare += max(cur_glare, 0.0); + } + } + } + + return max(col, vec3(0.0, 0.0, 0.0)); +} + +#else +#ifdef DEFINE_GL_FRAGCOLOR +out vec4 frag_data[3]; +#else +#define frag_data gl_FragData +#endif +#endif + +uniform sampler2D diffuseMap; //always in sRGB space + +#ifdef HAS_NORMAL_MAP +uniform sampler2D bumpMap; +#endif + +#ifdef HAS_SPECULAR_MAP +uniform sampler2D specularMap; + +VARYING vec2 vary_texcoord2; +#endif + +uniform float env_intensity; +uniform vec4 specular_color; // specular color RGB and specular exponent (glossiness) in alpha + +#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_MASK) +uniform float minimum_alpha; +#endif + +#ifdef HAS_NORMAL_MAP +VARYING vec3 vary_mat0; +VARYING vec3 vary_mat1; +VARYING vec3 vary_mat2; +VARYING vec2 vary_texcoord1; +#else +VARYING vec3 vary_normal; +#endif + +VARYING vec4 vertex_color; +VARYING vec2 vary_texcoord0; + +vec2 encode_normal(vec3 n); + +void main() +{ + vec2 pos_screen = vary_texcoord0.xy; + + vec4 diffcol = texture2D(diffuseMap, vary_texcoord0.xy); + diffcol.rgb *= vertex_color.rgb; + +#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_MASK) + + // Comparing floats cast from 8-bit values, produces acne right at the 8-bit transition points + float bias = 0.001953125; // 1/512, or half an 8-bit quantization + if (diffcol.a < minimum_alpha-bias) + { + discard; + } +#endif + +#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND) + vec3 gamma_diff = diffcol.rgb; + diffcol.rgb = srgb_to_linear(diffcol.rgb); +#endif + +#ifdef HAS_SPECULAR_MAP + vec4 spec = texture2D(specularMap, vary_texcoord2.xy); + spec.rgb *= specular_color.rgb; +#else + vec4 spec = vec4(specular_color.rgb, 1.0); +#endif + +#ifdef HAS_NORMAL_MAP + vec4 norm = texture2D(bumpMap, vary_texcoord1.xy); + + norm.xyz = norm.xyz * 2 - 1; + + vec3 tnorm = vec3(dot(norm.xyz,vary_mat0), + dot(norm.xyz,vary_mat1), + dot(norm.xyz,vary_mat2)); +#else + vec4 norm = vec4(0,0,0,1.0); + vec3 tnorm = vary_normal; +#endif + + norm.xyz = normalize(tnorm.xyz); + + vec2 abnormal = encode_normal(norm.xyz); + + vec4 final_color = diffcol; + +#if (DIFFUSE_ALPHA_MODE != DIFFUSE_ALPHA_MODE_EMISSIVE) + final_color.a = emissive_brightness; +#else + final_color.a = max(final_color.a, emissive_brightness); +#endif + + vec4 final_specular = spec; + +#ifdef HAS_SPECULAR_MAP + vec4 final_normal = vec4(encode_normal(normalize(tnorm)), env_intensity * spec.a, 0.0); + final_specular.a = specular_color.a * norm.a; +#else + vec4 final_normal = vec4(encode_normal(normalize(tnorm)), env_intensity, 0.0); + final_specular.a = specular_color.a; +#endif + +#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND) + + //forward rendering, output just lit sRGBA + vec3 pos = vary_position; + + float shadow = 1.0f; + +#ifdef HAS_SUN_SHADOW + shadow = sampleDirectionalShadow(pos.xyz, norm.xyz, pos_screen); +#endif + + spec = final_specular; + vec4 diffuse = final_color; + float envIntensity = final_normal.z; + + vec3 color = vec3(0,0,0); + + vec3 light_dir = (sun_up_factor == 1) ? sun_dir : moon_dir; + + float bloom = 0.0; + vec3 sunlit; + vec3 amblit; + vec3 additive; + vec3 atten; + + calcAtmosphericVars(pos.xyz, light_dir, 1.0, sunlit, amblit, additive, atten, false); + + // This call breaks the Mac GLSL compiler/linker for unknown reasons (17Mar2020) + // The call is either a no-op or a pure (pow) gamma adjustment, depending on GPU level + // TODO: determine if we want to re-apply the gamma adjustment, and if so understand & fix Mac breakage + //color = fullbrightScaleSoftClip(color); + + vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz)); + + //we're in sRGB space, so gamma correct this dot product so + // lighting from the sun stays sharp + float da = clamp(dot(normalize(norm.xyz), light_dir.xyz), 0.0, 1.0); + da = pow(da, 1.0 / 1.3); + vec3 sun_contrib = min(da, shadow) * sunlit; + +#ifdef HAS_REFLECTION_PROBES + vec3 ambenv; + vec3 glossenv; + vec3 legacyenv; + sampleReflectionProbes(ambenv, glossenv, legacyenv, pos.xyz, norm.xyz, spec.a, envIntensity); + amblit = max(ambenv, amblit); + color.rgb = amblit; +#else + + color = amblit; + + //darken ambient for normals perpendicular to light vector so surfaces in shadow + // and facing away from light still have some definition to them. + // do NOT gamma correct this dot product so ambient lighting stays soft + float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0); + ambient *= 0.5; + ambient *= ambient; + ambient = (1.0 - ambient); + + color *= ambient; +#endif + + color += sun_contrib; + + color *= gamma_diff.rgb; + + float glare = 0.0; + + if (spec.a > 0.0) // specular reflection + { + float sa = dot(refnormpersp, sun_dir.xyz); + vec3 dumbshiny = sunlit * shadow * (texture2D(lightFunc, vec2(sa, spec.a)).r); + + // add the two types of shiny together + vec3 spec_contrib = dumbshiny * spec.rgb; + bloom = dot(spec_contrib, spec_contrib) / 6; + + glare = max(spec_contrib.r, spec_contrib.g); + glare = max(glare, spec_contrib.b); + + color += spec_contrib; + +#ifdef HAS_REFLECTION_PROBES + applyGlossEnv(color, glossenv, spec, pos.xyz, norm.xyz); +#endif + } + + + color = mix(color.rgb, diffcol.rgb, diffuse.a); + +#ifdef HAS_REFLECTION_PROBES + if (envIntensity > 0.0) + { // add environmentmap + //fudge darker + legacyenv *= 0.5*diffuse.a+0.5; + + applyLegacyEnv(color, legacyenv, spec, pos.xyz, norm.xyz, envIntensity); + } +#else + if (envIntensity > 0.0) + { + //add environmentmap + vec3 env_vec = env_mat * refnormpersp; + + vec3 reflected_color = textureCube(environmentMap, env_vec).rgb; + + color = mix(color, reflected_color, envIntensity); + + float cur_glare = max(reflected_color.r, reflected_color.g); + cur_glare = max(cur_glare, reflected_color.b); + cur_glare *= envIntensity*4.0; + glare += cur_glare; + } +#endif + + color = atmosFragLighting(color, additive, atten); + color = scaleSoftClipFrag(color); + + //convert to linear before adding local lights + color = srgb_to_linear(color); + + vec3 npos = normalize(-pos.xyz); + + vec3 light = vec3(0, 0, 0); + + final_specular.rgb = srgb_to_linear(final_specular.rgb); // SL-14035 + +#define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, npos, diffuse.rgb, final_specular, pos.xyz, norm.xyz, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, glare, 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) + + color += light; + + glare = min(glare, 1.0); + float al = max(diffcol.a, glare)*vertex_color.a; + + //convert to srgb as this color is being written post gamma correction + color = linear_to_srgb(color); + +#ifdef WATER_FOG + vec4 temp = applyWaterFogView(pos, vec4(color, al)); + color = temp.rgb; + al = temp.a; +#endif + + frag_color = vec4(color, al); + +#else // mode is not DIFFUSE_ALPHA_MODE_BLEND, encode to gbuffer + + // deferred path + frag_data[0] = final_color; //gbuffer is sRGB + frag_data[1] = final_specular; // XYZ = Specular color. W = Specular exponent. + frag_data[2] = final_normal; // XY = Normal. Z = Env. intensity. +#endif +} + |