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Diffstat (limited to '')
| -rw-r--r-- | src/video_core/swrasterizer/lighting.cpp | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/src/video_core/swrasterizer/lighting.cpp b/src/video_core/swrasterizer/lighting.cpp deleted file mode 100644 index 5fa748611..000000000 --- a/src/video_core/swrasterizer/lighting.cpp +++ /dev/null @@ -1,308 +0,0 @@ -// Copyright 2017 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include "common/math_util.h" -#include "video_core/swrasterizer/lighting.h" - -namespace Pica { - -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, - const Math::Vec4<u8> (&texture_color)[4]) { - - Math::Vec3<float> surface_normal; - Math::Vec3<float> surface_tangent; - - if (lighting.config0.bump_mode != LightingRegs::LightingBumpMode::None) { - Math::Vec3<float> perturbation = - texture_color[lighting.config0.bump_selector].xyz().Cast<float>() / 127.5f - - Math::MakeVec(1.0f, 1.0f, 1.0f); - if (lighting.config0.bump_mode == LightingRegs::LightingBumpMode::NormalMap) { - if (!lighting.config0.disable_bump_renorm) { - const float z_square = 1 - perturbation.xy().Length2(); - perturbation.z = std::sqrt(std::max(z_square, 0.0f)); - } - surface_normal = perturbation; - surface_tangent = Math::MakeVec(1.0f, 0.0f, 0.0f); - } else if (lighting.config0.bump_mode == LightingRegs::LightingBumpMode::TangentMap) { - surface_normal = Math::MakeVec(0.0f, 0.0f, 1.0f); - surface_tangent = perturbation; - } else { - LOG_ERROR(HW_GPU, "Unknown bump mode %u", lighting.config0.bump_mode.Value()); - } - } else { - surface_normal = Math::MakeVec(0.0f, 0.0f, 1.0f); - surface_tangent = Math::MakeVec(1.0f, 0.0f, 0.0f); - } - - // Use the normalized the quaternion when performing the rotation - auto normal = Math::QuaternionRotate(normquat, surface_normal); - auto tangent = Math::QuaternionRotate(normquat, surface_tangent); - - 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(); - - Math::Vec3<float> norm_view = view.Normalized(); - Math::Vec3<float> half_vector = norm_view + light_vector; - - 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) { - float result = 0.0f; - - switch (input) { - case LightingRegs::LightingLutInput::NH: - result = Math::Dot(normal, half_vector.Normalized()); - break; - - case LightingRegs::LightingLutInput::VH: - result = Math::Dot(norm_view, half_vector.Normalized()); - break; - - case LightingRegs::LightingLutInput::NV: - result = Math::Dot(normal, norm_view); - break; - - case LightingRegs::LightingLutInput::LN: - result = Math::Dot(light_vector, normal); - break; - - case LightingRegs::LightingLutInput::SP: { - Math::Vec3<s32> spot_dir{light_config.spot_x.Value(), light_config.spot_y.Value(), - light_config.spot_z.Value()}; - result = Math::Dot(light_vector, spot_dir.Cast<float>() / 2047.0f); - break; - } - case LightingRegs::LightingLutInput::CP: - if (lighting.config0.config == LightingRegs::LightingConfig::Config7) { - const Math::Vec3<float> norm_half_vector = half_vector.Normalized(); - const Math::Vec3<float> half_vector_proj = - norm_half_vector - normal * Math::Dot(normal, norm_half_vector); - result = Math::Dot(half_vector_proj, tangent); - } else { - result = 0.0f; - } - 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); - }; - - // If enabled, compute spot light attenuation value - float spot_atten = 1.0f; - if (!lighting.IsSpotAttenDisabled(num) && - LightingRegs::IsLightingSamplerSupported( - lighting.config0.config, LightingRegs::LightingSampler::SpotlightAttenuation)) { - auto lut = LightingRegs::SpotlightAttenuationSampler(num); - spot_atten = GetLutValue(lighting.lut_input.sp, lighting.abs_lut_input.disable_sp == 0, - lighting.lut_scale.sp, lut); - } - - // 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 - // Note: only the last entry in the light slots applies the Fresnel factor - if (light_index == lighting.max_light_index && 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); - - if (light_config.config.geometric_factor_0 || light_config.config.geometric_factor_1) { - float geo_factor = half_vector.Length2(); - geo_factor = geo_factor == 0.0f ? 0.0f : std::min(dot_product / geo_factor, 1.0f); - if (light_config.config.geometric_factor_0) { - specular_0 *= geo_factor; - } - if (light_config.config.geometric_factor_1) { - specular_1 *= geo_factor; - } - } - - auto diffuse = - light_config.diffuse.ToVec3f() * dot_product + light_config.ambient.ToVec3f(); - diffuse_sum += Math::MakeVec(diffuse * dist_atten * spot_atten, 0.0f); - - specular_sum += Math::MakeVec( - (specular_0 + specular_1) * clamp_highlights * dist_atten * spot_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 std::make_tuple(diffuse, specular); -} - -} // namespace Pica |