From 46b8c8e1da6bc29df2662d63b0e028136fef3636 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Fri, 9 Jun 2017 14:44:02 -0500
Subject: [PATCH] SwRasterizer: Calculate specular_1 for fragment lighting.
---
src/video_core/swrasterizer/rasterizer.cpp | 62 ++++++++++++++++++++--
1 file changed, 59 insertions(+), 3 deletions(-)
diff --git a/src/video_core/swrasterizer/rasterizer.cpp b/src/video_core/swrasterizer/rasterizer.cpp
index 34b84b0af..e0c326a4a 100644
--- a/src/video_core/swrasterizer/rasterizer.cpp
+++ b/src/video_core/swrasterizer/rasterizer.cpp
@@ -148,8 +148,8 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(const Math::Qu
Math::Vec3<float> light_vector = {};
Math::Vec4<float> diffuse_sum = {0.f, 0.f, 0.f, 1.f};
- // TODO(Subv): Calculate specular
Math::Vec4<float> specular_sum = {0.f, 0.f, 0.f, 1.f};
+ Math::Vec3<float> refl_value = {};
for (unsigned light_index = 0; light_index <= lighting.max_light_index; ++light_index) {
unsigned num = lighting.light_enable.GetNum(light_index);
@@ -253,8 +253,64 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(const Math::Qu
Math::Vec3<float> specular_0 = d0_lut_value * light_config.specular_0.ToVec3f();
- // TODO(Subv): Specular 1
- Math::Vec3<float> specular_1 = {};
+ // If enabled, lookup ReflectRed value, otherwise, 1.0 is used
+ if (lighting.config1.disable_lut_rr == 0 &&
+ LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
+ LightingRegs::LightingSampler::ReflectRed)) {
+
+ float index = GetLutIndex(num, lighting.lut_input.rr, lighting.abs_lut_input.disable_rr == 0);
+
+ float scale = lighting.lut_scale.GetScale(lighting.lut_scale.rr);
+
+ refl_value.x = scale * LookupLightingLut(static_cast<size_t>(LightingRegs::LightingSampler::ReflectRed), index);
+ } else {
+ refl_value.x = 1.0f;
+ }
+
+ // If enabled, lookup ReflectGreen value, otherwise, ReflectRed value is used
+ if (lighting.config1.disable_lut_rg == 0 &&
+ LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
+ LightingRegs::LightingSampler::ReflectGreen)) {
+
+ float index = GetLutIndex(num, lighting.lut_input.rg, lighting.abs_lut_input.disable_rg == 0);
+
+ float scale = lighting.lut_scale.GetScale(lighting.lut_scale.rg);
+
+ refl_value.y = scale * LookupLightingLut(static_cast<size_t>(LightingRegs::LightingSampler::ReflectGreen), index);
+ } else {
+ refl_value.y = refl_value.x;
+ }
+
+ // If enabled, lookup ReflectBlue value, otherwise, ReflectRed value is used
+ if (lighting.config1.disable_lut_rb == 0 &&
+ LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
+ LightingRegs::LightingSampler::ReflectBlue)) {
+
+ float index = GetLutIndex(num, lighting.lut_input.rb, lighting.abs_lut_input.disable_rb == 0);
+
+ float scale = lighting.lut_scale.GetScale(lighting.lut_scale.rb);
+
+ refl_value.z = scale * LookupLightingLut(static_cast<size_t>(LightingRegs::LightingSampler::ReflectBlue), index);
+ } else {
+ refl_value.z = refl_value.x;
+ }
+
+ float d1_lut_value = 1.0f;
+ if (lighting.config1.disable_lut_d1 == 0 &&
+ LightingRegs::IsLightingSamplerSupported(
+ lighting.config0.config, LightingRegs::LightingSampler::Distribution1)) {
+
+ // Lookup specular "distribution 1" LUT value
+ float index = GetLutIndex(num, lighting.lut_input.d1.Value(), lighting.abs_lut_input.disable_d1 == 0);
+
+ float scale = lighting.lut_scale.GetScale(lighting.lut_scale.d1);
+
+ d1_lut_value = scale * LookupLightingLut(static_cast<size_t>(LightingRegs::LightingSampler::Distribution1), index);
+ }
+
+ Math::Vec3<float> specular_1 = d1_lut_value * refl_value * light_config.specular_1.ToVec3f();
+
+ // TODO(Subv): Fresnel
auto diffuse = light_config.diffuse.ToVec3f() * dot_product + light_config.ambient.ToVec3f();
diffuse_sum += Math::MakeVec(diffuse * dist_atten, 0.0f);