SwRasterizer/Lighting: move to its own file

1 files changed, 1 insertions, 240 deletions

diff --git a/src/video_core/swrasterizer/rasterizer.cpp b/src/video_core/swrasterizer/rasterizer.cpp
index aee630954..bc7e1c56c 100644
--- a/src/video_core/swrasterizer/rasterizer.cpp
+++ b/src/video_core/swrasterizer/rasterizer.cpp
@@ -24,6 +24,7 @@
 #include "video_core/regs_rasterizer.h"
 #include "video_core/regs_texturing.h"
 #include "video_core/shader/shader.h"
+#include "video_core/swrasterizer/fragment_lighting.h"
 #include "video_core/swrasterizer/framebuffer.h"
 #include "video_core/swrasterizer/proctex.h"
 #include "video_core/swrasterizer/rasterizer.h"
@@ -115,246 +116,6 @@ static std::tuple<float24, float24, PAddr> ConvertCubeCoord(float24 u, float24 v
     return std::make_tuple(x / z * half + half, y / z * half + half, addr);
 }
 
-static float LookupLightingLut(const Pica::State::Lighting& lighting, size_t lut_index, u8 index,
-                               float delta) {
-    ASSERT_MSG(lut_index < lighting.luts.size(), "Out of range lut");
-    ASSERT_MSG(index < lighting.luts[lut_index].size(), "Out of range index");
-
-    const auto& lut = lighting.luts[lut_index][index];
-
-    float lut_value = lut.ToFloat();
-    float lut_diff = lut.DiffToFloat();
-
-    return lut_value + lut_diff * delta;
-}
-
-std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
-    const Pica::LightingRegs& lighting, const Pica::State::Lighting& lighting_state,
-    const Math::Quaternion<float>& normquat, const Math::Vec3<float>& view) {
-
-    // TODO(Subv): Bump mapping
-    Math::Vec3<float> surface_normal = {0.0f, 0.0f, 1.0f};
-
-    if (lighting.config0.bump_mode != LightingRegs::LightingBumpMode::None) {
-        LOG_CRITICAL(HW_GPU, "unimplemented bump mapping");
-        UNIMPLEMENTED();
-    }
-
-    // Use the normalized the quaternion when performing the rotation
-    auto normal = Math::QuaternionRotate(normquat, surface_normal);
-
-    Math::Vec4<float> diffuse_sum = {0.0f, 0.0f, 0.0f, 1.0f};
-    Math::Vec4<float> specular_sum = {0.0f, 0.0f, 0.0f, 1.0f};
-
-    for (unsigned light_index = 0; light_index <= lighting.max_light_index; ++light_index) {
-        unsigned num = lighting.light_enable.GetNum(light_index);
-        const auto& light_config = lighting.light[num];
-
-        Math::Vec3<float> refl_value = {};
-        Math::Vec3<float> position = {float16::FromRaw(light_config.x).ToFloat32(),
-                                      float16::FromRaw(light_config.y).ToFloat32(),
-                                      float16::FromRaw(light_config.z).ToFloat32()};
-        Math::Vec3<float> light_vector;
-
-        if (light_config.config.directional)
-            light_vector = position;
-        else
-            light_vector = position + view;
-
-        light_vector.Normalize();
-
-        float dist_atten = 1.0f;
-        if (!lighting.IsDistAttenDisabled(num)) {
-            auto distance = (-view - position).Length();
-            float scale = Pica::float20::FromRaw(light_config.dist_atten_scale).ToFloat32();
-            float bias = Pica::float20::FromRaw(light_config.dist_atten_bias).ToFloat32();
-            size_t lut =
-                static_cast<size_t>(LightingRegs::LightingSampler::DistanceAttenuation) + num;
-
-            float sample_loc = MathUtil::Clamp(scale * distance + bias, 0.0f, 1.0f);
-
-            u8 lutindex =
-                static_cast<u8>(MathUtil::Clamp(std::floor(sample_loc * 256.0f), 0.0f, 255.0f));
-            float delta = sample_loc * 256 - lutindex;
-            dist_atten = LookupLightingLut(lighting_state, lut, lutindex, delta);
-        }
-
-        auto GetLutValue = [&](LightingRegs::LightingLutInput input, bool abs,
-                               LightingRegs::LightingScale scale_enum,
-                               LightingRegs::LightingSampler sampler) {
-            Math::Vec3<float> norm_view = view.Normalized();
-            Math::Vec3<float> half_angle = (norm_view + light_vector).Normalized();
-            float result = 0.0f;
-
-            switch (input) {
-            case LightingRegs::LightingLutInput::NH:
-                result = Math::Dot(normal, half_angle);
-                break;
-
-            case LightingRegs::LightingLutInput::VH:
-                result = Math::Dot(norm_view, half_angle);
-                break;
-
-            case LightingRegs::LightingLutInput::NV:
-                result = Math::Dot(normal, norm_view);
-                break;
-
-            case LightingRegs::LightingLutInput::LN:
-                result = Math::Dot(light_vector, normal);
-                break;
-
-            default:
-                LOG_CRITICAL(HW_GPU, "Unknown lighting LUT input %u\n", static_cast<u32>(input));
-                UNIMPLEMENTED();
-                result = 0.0f;
-            }
-
-            u8 index;
-            float delta;
-
-            if (abs) {
-                if (light_config.config.two_sided_diffuse)
-                    result = std::abs(result);
-                else
-                    result = std::max(result, 0.0f);
-
-                float flr = std::floor(result * 256.0f);
-                index = static_cast<u8>(MathUtil::Clamp(flr, 0.0f, 255.0f));
-                delta = result * 256 - index;
-            } else {
-                float flr = std::floor(result * 128.0f);
-                s8 signed_index = static_cast<s8>(MathUtil::Clamp(flr, -128.0f, 127.0f));
-                delta = result * 128.0f - signed_index;
-                index = static_cast<u8>(signed_index);
-            }
-
-            float scale = lighting.lut_scale.GetScale(scale_enum);
-            return scale *
-                   LookupLightingLut(lighting_state, static_cast<size_t>(sampler), index, delta);
-        };
-
-        // Specular 0 component
-        float d0_lut_value = 1.0f;
-        if (lighting.config1.disable_lut_d0 == 0 &&
-            LightingRegs::IsLightingSamplerSupported(
-                lighting.config0.config, LightingRegs::LightingSampler::Distribution0)) {
-            d0_lut_value =
-                GetLutValue(lighting.lut_input.d0, lighting.abs_lut_input.disable_d0 == 0,
-                            lighting.lut_scale.d0, LightingRegs::LightingSampler::Distribution0);
-        }
-
-        Math::Vec3<float> specular_0 = d0_lut_value * light_config.specular_0.ToVec3f();
-
-        // 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)) {
-            refl_value.x =
-                GetLutValue(lighting.lut_input.rr, lighting.abs_lut_input.disable_rr == 0,
-                            lighting.lut_scale.rr, LightingRegs::LightingSampler::ReflectRed);
-        } 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)) {
-            refl_value.y =
-                GetLutValue(lighting.lut_input.rg, lighting.abs_lut_input.disable_rg == 0,
-                            lighting.lut_scale.rg, LightingRegs::LightingSampler::ReflectGreen);
-        } 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)) {
-            refl_value.z =
-                GetLutValue(lighting.lut_input.rb, lighting.abs_lut_input.disable_rb == 0,
-                            lighting.lut_scale.rb, LightingRegs::LightingSampler::ReflectBlue);
-        } else {
-            refl_value.z = refl_value.x;
-        }
-
-        // Specular 1 component
-        float d1_lut_value = 1.0f;
-        if (lighting.config1.disable_lut_d1 == 0 &&
-            LightingRegs::IsLightingSamplerSupported(
-                lighting.config0.config, LightingRegs::LightingSampler::Distribution1)) {
-            d1_lut_value =
-                GetLutValue(lighting.lut_input.d1, lighting.abs_lut_input.disable_d1 == 0,
-                            lighting.lut_scale.d1, LightingRegs::LightingSampler::Distribution1);
-        }
-
-        Math::Vec3<float> specular_1 =
-            d1_lut_value * refl_value * light_config.specular_1.ToVec3f();
-
-        // Fresnel
-        if (lighting.config1.disable_lut_fr == 0 &&
-            LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
-                                                     LightingRegs::LightingSampler::Fresnel)) {
-
-            float lut_value =
-                GetLutValue(lighting.lut_input.fr, lighting.abs_lut_input.disable_fr == 0,
-                            lighting.lut_scale.fr, LightingRegs::LightingSampler::Fresnel);
-
-            // Enabled for diffuse 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 dot_product = Math::Dot(light_vector, normal);
-
-        // Calculate clamp highlights before applying the two-sided diffuse configuration to the dot
-        // product.
-        float clamp_highlights = 1.0f;
-        if (lighting.config0.clamp_highlights) {
-            if (dot_product <= 0.0f)
-                clamp_highlights = 0.0f;
-            else
-                clamp_highlights = 1.0f;
-        }
-
-        if (light_config.config.two_sided_diffuse)
-            dot_product = std::abs(dot_product);
-        else
-            dot_product = std::max(dot_product, 0.0f);
-
-        auto diffuse =
-            light_config.diffuse.ToVec3f() * dot_product + light_config.ambient.ToVec3f();
-        diffuse_sum += Math::MakeVec(diffuse * dist_atten, 0.0f);
-
-        specular_sum +=
-            Math::MakeVec((specular_0 + specular_1) * clamp_highlights * dist_atten, 0.0f);
-    }
-
-    diffuse_sum += Math::MakeVec(lighting.global_ambient.ToVec3f(), 0.0f);
-
-    auto diffuse = Math::MakeVec<float>(MathUtil::Clamp(diffuse_sum.x, 0.0f, 1.0f) * 255,
-                                        MathUtil::Clamp(diffuse_sum.y, 0.0f, 1.0f) * 255,
-                                        MathUtil::Clamp(diffuse_sum.z, 0.0f, 1.0f) * 255,
-                                        MathUtil::Clamp(diffuse_sum.w, 0.0f, 1.0f) * 255)
-                       .Cast<u8>();
-    auto specular = Math::MakeVec<float>(MathUtil::Clamp(specular_sum.x, 0.0f, 1.0f) * 255,
-                                         MathUtil::Clamp(specular_sum.y, 0.0f, 1.0f) * 255,
-                                         MathUtil::Clamp(specular_sum.z, 0.0f, 1.0f) * 255,
-                                         MathUtil::Clamp(specular_sum.w, 0.0f, 1.0f) * 255)
-                        .Cast<u8>();
-    return {diffuse, specular};
-}
-
 MICROPROFILE_DEFINE(GPU_Rasterization, "GPU", "Rasterization", MP_RGB(50, 50, 240));
 
 /**