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gl_shader_gen: Implement lighting red, green, and blue reflection.
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01b407638c
commit
348c9c9ff3
@ -650,9 +650,9 @@ struct Regs {
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Distribution0 = 0,
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Distribution1 = 1,
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Fresnel = 3,
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Blue = 4,
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Green = 5,
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Red = 6,
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ReflectBlue = 4,
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ReflectGreen = 5,
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ReflectRed = 6,
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SpotlightAttenuation = 8,
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DistanceAttenuation = 16,
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};
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@ -718,10 +718,19 @@ struct Regs {
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switch (sampler) {
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case LightingSampler::Distribution0:
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return (config != LightingConfig::Config1);
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case LightingSampler::Distribution1:
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return (config != LightingConfig::Config0) && (config != LightingConfig::Config1) && (config != LightingConfig::Config5);
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case LightingSampler::Fresnel:
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return (config != LightingConfig::Config0) && (config != LightingConfig::Config2) && (config != LightingConfig::Config4);
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case LightingSampler::ReflectRed:
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return (config != LightingConfig::Config3);
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case LightingSampler::ReflectGreen:
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case LightingSampler::ReflectBlue:
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return (config == LightingConfig::Config4) || (config == LightingConfig::Config5) || (config == LightingConfig::Config7);
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}
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return false;
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}
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@ -773,6 +782,9 @@ struct Regs {
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BitField<16, 1, u32> lut_enable_d0; // 0: GL_TRUE, 1: GL_FALSE
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BitField<17, 1, u32> lut_enable_d1; // 0: GL_TRUE, 1: GL_FALSE
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BitField<19, 1, u32> lut_enable_fr; // 0: GL_TRUE, 1: GL_FALSE
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BitField<20, 1, u32> lut_enable_rr; // 0: GL_TRUE, 1: GL_FALSE
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BitField<21, 1, u32> lut_enable_rg; // 0: GL_TRUE, 1: GL_FALSE
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BitField<22, 1, u32> lut_enable_rb; // 0: GL_TRUE, 1: GL_FALSE
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// Each bit specifies whether distance attenuation should be applied for the
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// corresponding light
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@ -102,6 +102,21 @@ struct PicaShaderConfig {
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res.lighting.lut_fr.type = (Pica::Regs::LightingLutInput)regs.lighting.lut_input.fr.Value();
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res.lighting.lut_fr.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.fr);
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res.lighting.lut_rr.enable = regs.lighting.lut_enable_rr == 0;
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res.lighting.lut_rr.abs_input = regs.lighting.abs_lut_input.rr == 0;
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res.lighting.lut_rr.type = (Pica::Regs::LightingLutInput)regs.lighting.lut_input.rr.Value();
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res.lighting.lut_rr.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.rr);
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res.lighting.lut_rg.enable = regs.lighting.lut_enable_rg == 0;
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res.lighting.lut_rg.abs_input = regs.lighting.abs_lut_input.rg == 0;
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res.lighting.lut_rg.type = (Pica::Regs::LightingLutInput)regs.lighting.lut_input.rg.Value();
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res.lighting.lut_rg.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.rg);
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res.lighting.lut_rb.enable = regs.lighting.lut_enable_rb == 0;
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res.lighting.lut_rb.abs_input = regs.lighting.abs_lut_input.rb == 0;
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res.lighting.lut_rb.type = (Pica::Regs::LightingLutInput)regs.lighting.lut_input.rb.Value();
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res.lighting.lut_rb.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.rb);
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res.lighting.config = regs.lighting.config;
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res.lighting.fresnel_selector = regs.lighting.fresnel_selector;
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res.lighting.clamp_highlights = regs.lighting.clamp_highlights != 0;
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@ -139,6 +154,7 @@ struct PicaShaderConfig {
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bool enable = false;
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unsigned src_num = 0;
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bool clamp_highlights = false;
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Pica::Regs::LightingConfig config = Pica::Regs::LightingConfig::Config0;
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Pica::Regs::LightingFresnelSelector fresnel_selector = Pica::Regs::LightingFresnelSelector::None;
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@ -147,7 +163,7 @@ struct PicaShaderConfig {
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bool abs_input = false;
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Pica::Regs::LightingLutInput type = Pica::Regs::LightingLutInput::NH;
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float scale = 1.0f;
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} lut_d0, lut_d1, lut_fr;
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} lut_d0, lut_d1, lut_fr, lut_rr, lut_rg, lut_rb;
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} lighting;
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};
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};
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@ -321,9 +321,10 @@ static void WriteTevStage(std::string& out, const PicaShaderConfig& config, unsi
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/// Writes the code to emulate fragment lighting
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static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
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// Define lighting globals
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out += "vec4 diffuse_sum = vec4(0.0, 0.0, 0.0, 1.0);\n";
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out += "vec4 specular_sum = vec4(0.0, 0.0, 0.0, 1.0);\n";
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out += "vec3 light_vector = vec3(0.0);\n";
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out += "vec4 diffuse_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
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"vec4 specular_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
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"vec3 light_vector = vec3(0.0);\n"
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"vec3 refl_value = vec3(0.0);\n";
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// Convert interpolated quaternion to a GL fragment normal
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out += "vec3 normal = normalize(vec3(\n";
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@ -396,10 +397,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
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if (light_config.dist_atten_enable) {
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std::string scale = std::to_string(light_config.dist_atten_scale);
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std::string bias = std::to_string(light_config.dist_atten_bias);
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std::string lut_index = "(" + scale + " * length(-view - " + light_src + ".position) + " + bias + ")";
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lut_index = "((clamp(" + lut_index + ", 0.0, FLOAT_255)))";
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std::string index = "(" + scale + " * length(-view - " + light_src + ".position) + " + bias + ")";
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index = "((clamp(" + index + ", 0.0, FLOAT_255)))";
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const unsigned lut_num = ((unsigned)Regs::LightingSampler::DistanceAttenuation + light_config.num);
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dist_atten = GetLutValue((Regs::LightingSampler)lut_num, lut_index);
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dist_atten = GetLutValue((Regs::LightingSampler)lut_num, index);
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}
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// If enabled, clamp specular component if lighting result is negative
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@ -409,35 +410,62 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
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std::string d0_lut_value = "1.0";
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if (config.lighting.lut_d0.enable && Pica::Regs::IsLightingSamplerSupported(config.lighting.config, Pica::Regs::LightingSampler::Distribution0)) {
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// Lookup specular "distribution 0" LUT value
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std::string d0_lut_index = GetLutIndex(light_config.num, config.lighting.lut_d0.type, config.lighting.lut_d0.abs_input);
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d0_lut_value = "(" + std::to_string(config.lighting.lut_d0.scale) + " * " + GetLutValue(Regs::LightingSampler::Distribution0, d0_lut_index) + ")";
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std::string index = GetLutIndex(light_config.num, config.lighting.lut_d0.type, config.lighting.lut_d0.abs_input);
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d0_lut_value = "(" + std::to_string(config.lighting.lut_d0.scale) + " * " + GetLutValue(Regs::LightingSampler::Distribution0, index) + ")";
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}
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std::string specular_0 = "(" + d0_lut_value + " * " + light_src + ".specular_0)";
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// If enabled, lookup ReflectRed value, otherwise, 1.0 is used
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if (config.lighting.lut_rr.enable && Pica::Regs::IsLightingSamplerSupported(config.lighting.config, Pica::Regs::LightingSampler::ReflectRed)) {
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std::string index = GetLutIndex(light_config.num, config.lighting.lut_rr.type, config.lighting.lut_rr.abs_input);
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std::string value = "(" + std::to_string(config.lighting.lut_rr.scale) + " * " + GetLutValue(Regs::LightingSampler::ReflectRed, index) + ")";
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out += "refl_value.r = " + value + ";\n";
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} else {
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out += "refl_value.r = 1.0;\n";
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}
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// If enabled, lookup ReflectGreen value, otherwise, ReflectRed value is used
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if (config.lighting.lut_rg.enable && Pica::Regs::IsLightingSamplerSupported(config.lighting.config, Pica::Regs::LightingSampler::ReflectGreen)) {
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std::string index = GetLutIndex(light_config.num, config.lighting.lut_rg.type, config.lighting.lut_rg.abs_input);
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std::string value = "(" + std::to_string(config.lighting.lut_rg.scale) + " * " + GetLutValue(Regs::LightingSampler::ReflectGreen, index) + ")";
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out += "refl_value.g = " + value + ";\n";
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} else {
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out += "refl_value.g = refl_value.r;\n";
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}
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// If enabled, lookup ReflectBlue value, otherwise, ReflectRed value is used
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if (config.lighting.lut_rb.enable && Pica::Regs::IsLightingSamplerSupported(config.lighting.config, Pica::Regs::LightingSampler::ReflectBlue)) {
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std::string index = GetLutIndex(light_config.num, config.lighting.lut_rb.type, config.lighting.lut_rb.abs_input);
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std::string value = "(" + std::to_string(config.lighting.lut_rb.scale) + " * " + GetLutValue(Regs::LightingSampler::ReflectBlue, index) + ")";
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out += "refl_value.b = " + value + ";\n";
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} else {
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out += "refl_value.b = refl_value.r;\n";
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}
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// Specular 1 component
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std::string d1_lut_value = "1.0";
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if (config.lighting.lut_d1.enable && Pica::Regs::IsLightingSamplerSupported(config.lighting.config, Pica::Regs::LightingSampler::Distribution1)) {
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// Lookup specular "distribution 1" LUT value
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std::string d1_lut_index = GetLutIndex(light_config.num, config.lighting.lut_d1.type, config.lighting.lut_d1.abs_input);
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d1_lut_value = "(" + std::to_string(config.lighting.lut_d1.scale) + " * " + GetLutValue(Regs::LightingSampler::Distribution1, d1_lut_index) + ")";
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std::string index = GetLutIndex(light_config.num, config.lighting.lut_d1.type, config.lighting.lut_d1.abs_input);
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d1_lut_value = "(" + std::to_string(config.lighting.lut_d1.scale) + " * " + GetLutValue(Regs::LightingSampler::Distribution1, index) + ")";
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}
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std::string specular_1 = "(" + d1_lut_value + " * " + light_src + ".specular_1)";
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std::string specular_1 = "(" + d1_lut_value + " * refl_value * " + light_src + ".specular_1)";
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// Fresnel
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if (config.lighting.lut_fr.enable && Pica::Regs::IsLightingSamplerSupported(config.lighting.config, Pica::Regs::LightingSampler::Fresnel)) {
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// Lookup fresnel LUT value
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std::string fr_lut_index = GetLutIndex(light_config.num, config.lighting.lut_fr.type, config.lighting.lut_fr.abs_input);
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std::string fr_lut_value = "(" + std::to_string(config.lighting.lut_fr.scale) + " * " + GetLutValue(Regs::LightingSampler::Fresnel, fr_lut_index) + ")";
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std::string index = GetLutIndex(light_config.num, config.lighting.lut_fr.type, config.lighting.lut_fr.abs_input);
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std::string value = "(" + std::to_string(config.lighting.lut_fr.scale) + " * " + GetLutValue(Regs::LightingSampler::Fresnel, index) + ")";
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// Enabled for difffuse lighting alpha component
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if (config.lighting.fresnel_selector == Pica::Regs::LightingFresnelSelector::PrimaryAlpha ||
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config.lighting.fresnel_selector == Pica::Regs::LightingFresnelSelector::BothAlpha)
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out += "diffuse_sum.a *= " + fr_lut_value + ";\n";
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config.lighting.fresnel_selector == Pica::Regs::LightingFresnelSelector::Both)
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out += "diffuse_sum.a *= " + value + ";\n";
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// Enabled for the specular lighting alpha component
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if (config.lighting.fresnel_selector == Pica::Regs::LightingFresnelSelector::SecondaryAlpha ||
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config.lighting.fresnel_selector == Pica::Regs::LightingFresnelSelector::BothAlpha)
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out += "specular_sum.a *= " + fr_lut_value + ";\n";
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config.lighting.fresnel_selector == Pica::Regs::LightingFresnelSelector::Both)
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out += "specular_sum.a *= " + value + ";\n";
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}
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// Compute primary fragment color (diffuse lighting) function
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