From 10b0bea06008fea89564dc5ef8895c0274f8ef18 Mon Sep 17 00:00:00 2001 From: Subv Date: Fri, 9 Jun 2017 14:55:54 -0500 Subject: [PATCH] SwRasterizer: Calculate fresnel for fragment lighting. --- src/video_core/swrasterizer/rasterizer.cpp | 26 +++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/src/video_core/swrasterizer/rasterizer.cpp b/src/video_core/swrasterizer/rasterizer.cpp index e0c326a4a..2d1daa24a 100644 --- a/src/video_core/swrasterizer/rasterizer.cpp +++ b/src/video_core/swrasterizer/rasterizer.cpp @@ -310,7 +310,31 @@ std::tuple, Math::Vec4> ComputeFragmentsColors(const Math::Qu Math::Vec3 specular_1 = d1_lut_value * refl_value * light_config.specular_1.ToVec3f(); - // TODO(Subv): Fresnel + if (lighting.config1.disable_lut_fr == 0 && + LightingRegs::IsLightingSamplerSupported( + lighting.config0.config, LightingRegs::LightingSampler::Fresnel)) { + + // Lookup fresnel LUT value + float index = GetLutIndex(num, lighting.lut_input.fr.Value(), lighting.abs_lut_input.disable_fr == 0); + + float scale = lighting.lut_scale.GetScale(lighting.lut_scale.fr); + + float lut_value = scale * LookupLightingLut(static_cast(LightingRegs::LightingSampler::Fresnel), index); + + // Enabled for difffuse lighting alpha component + if (lighting.config0.fresnel_selector == LightingRegs::LightingFresnelSelector::PrimaryAlpha || + lighting.config0.fresnel_selector == LightingRegs::LightingFresnelSelector::Both) { + diffuse_sum.a() *= lut_value; + } + + // Enabled for the specular lighting alpha component + if (lighting.config0.fresnel_selector == + LightingRegs::LightingFresnelSelector::SecondaryAlpha || + lighting.config0.fresnel_selector == LightingRegs::LightingFresnelSelector::Both) { + specular_sum.a() *= lut_value; + } + } + auto diffuse = light_config.diffuse.ToVec3f() * dot_product + light_config.ambient.ToVec3f(); diffuse_sum += Math::MakeVec(diffuse * dist_atten, 0.0f);