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SwRasterizer/Lighting: refactor GetLutValue into a function.

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merging similar pattern. Also makes the code more similar to the gl one
This commit is contained in:
wwylele 2017-07-11 21:36:19 +03:00
parent f13cf506e0
commit c6d1472513
1 changed files with 27 additions and 83 deletions
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110
src/video_core/swrasterizer/rasterizer.cpp
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@ -179,9 +179,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
dist_atten = LookupLightingLut(lighting_state, lut, lutindex, delta);
}
auto GetLutIndex = [&](unsigned num, LightingRegs::LightingLutInput input,
bool abs) -> std::tuple<u8, float> {
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;
@ -209,6 +209,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
result = 0.f;
}
u8 index;
float delta;
if (abs) {
if (light_config.config.two_sided_diffuse)
result = std::abs(result);
@ -216,15 +219,18 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
result = std::max(result, 0.0f);
float flr = std::floor(result * 256.f);
u8 lutindex = static_cast<u8>(MathUtil::Clamp(flr, 0.0f, 255.0f));
float delta = result * 256 - lutindex;
return {lutindex, delta};
index = static_cast<u8>(MathUtil::Clamp(flr, 0.0f, 255.0f));
delta = result * 256 - index;
} else {
float flr = std::floor(result * 128.f);
s8 lutindex = static_cast<s8>(MathUtil::Clamp(flr, -128.0f, 127.0f));
float delta = result * 128.f - lutindex;
return {static_cast<u8>(lutindex), delta};
s8 signed_index = static_cast<s8>(MathUtil::Clamp(flr, -128.0f, 127.0f));
delta = result * 128.f - 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
@ -232,20 +238,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
if (lighting.config1.disable_lut_d0 == 0 &&
LightingRegs::IsLightingSamplerSupported(
lighting.config0.config, LightingRegs::LightingSampler::Distribution0)) {
// Lookup specular "distribution 0" LUT value
u8 index;
float delta;
std::tie(index, delta) = GetLutIndex(num, lighting.lut_input.d0.Value(),
lighting.abs_lut_input.disable_d0 == 0);
float scale = lighting.lut_scale.GetScale(lighting.lut_scale.d0);
d0_lut_value =
scale *
LookupLightingLut(lighting_state,
static_cast<size_t>(LightingRegs::LightingSampler::Distribution0),
index, delta);
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();
@ -254,19 +249,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
if (lighting.config1.disable_lut_rr == 0 &&
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
LightingRegs::LightingSampler::ReflectRed)) {
u8 index;
float delta;
std::tie(index, delta) =
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(lighting_state,
static_cast<size_t>(LightingRegs::LightingSampler::ReflectRed),
index, delta);
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;
}
@ -275,19 +260,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
if (lighting.config1.disable_lut_rg == 0 &&
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
LightingRegs::LightingSampler::ReflectGreen)) {
u8 index;
float delta;
std::tie(index, delta) =
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(lighting_state,
static_cast<size_t>(LightingRegs::LightingSampler::ReflectGreen),
index, delta);
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;
}
@ -296,19 +271,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
if (lighting.config1.disable_lut_rb == 0 &&
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
LightingRegs::LightingSampler::ReflectBlue)) {
u8 index;
float delta;
std::tie(index, delta) =
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(lighting_state,
static_cast<size_t>(LightingRegs::LightingSampler::ReflectBlue),
index, delta);
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;
}
@ -317,20 +282,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
if (lighting.config1.disable_lut_d1 == 0 &&
LightingRegs::IsLightingSamplerSupported(
lighting.config0.config, LightingRegs::LightingSampler::Distribution1)) {
// Lookup specular "distribution 1" LUT value
u8 index;
float delta;
std::tie(index, delta) = 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(lighting_state,
static_cast<size_t>(LightingRegs::LightingSampler::Distribution1),
index, delta);
GetLutValue(lighting.lut_input.d1, lighting.abs_lut_input.disable_d1 == 0,
lighting.lut_scale.d1, LightingRegs::LightingSampler::Distribution1);
}
Math::Vec3<float> specular_1 =
@ -340,19 +294,9 @@ std::tuple<Math::Vec4<u8>, Math::Vec4<u8>> ComputeFragmentsColors(
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
LightingRegs::LightingSampler::Fresnel)) {
// Lookup fresnel LUT value
u8 index;
float delta;
std::tie(index, delta) = 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(lighting_state,
static_cast<size_t>(LightingRegs::LightingSampler::Fresnel),
index, delta);
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 ==