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Diffstat (limited to 'src/video_core/regs_lighting.h')
| -rw-r--r-- | src/video_core/regs_lighting.h | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/src/video_core/regs_lighting.h b/src/video_core/regs_lighting.h deleted file mode 100644 index b89709cfe..000000000 --- a/src/video_core/regs_lighting.h +++ /dev/null @@ -1,321 +0,0 @@ -// Copyright 2017 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#pragma once - -#include <array> - -#include "common/assert.h" -#include "common/bit_field.h" -#include "common/common_funcs.h" -#include "common/common_types.h" -#include "common/vector_math.h" - -namespace Pica { - -struct LightingRegs { - enum class LightingSampler { - Distribution0 = 0, - Distribution1 = 1, - Fresnel = 3, - ReflectBlue = 4, - ReflectGreen = 5, - ReflectRed = 6, - SpotlightAttenuation = 8, - DistanceAttenuation = 16, - }; - - static constexpr unsigned NumLightingSampler = 24; - - static LightingSampler SpotlightAttenuationSampler(unsigned index) { - return static_cast<LightingSampler>( - static_cast<unsigned>(LightingSampler::SpotlightAttenuation) + index); - } - - static LightingSampler DistanceAttenuationSampler(unsigned index) { - return static_cast<LightingSampler>( - static_cast<unsigned>(LightingSampler::DistanceAttenuation) + index); - } - - /** - * Pica fragment lighting supports using different LUTs for each lighting component: Reflectance - * R, G, and B channels, distribution function for specular components 0 and 1, fresnel factor, - * and spotlight attenuation. Furthermore, which LUTs are used for each channel (or whether a - * channel is enabled at all) is specified by various pre-defined lighting configurations. With - * configurations that require more LUTs, more cycles are required on HW to perform lighting - * computations. - */ - enum class LightingConfig : u32 { - Config0 = 0, ///< Reflect Red, Distribution 0, Spotlight - Config1 = 1, ///< Reflect Red, Fresnel, Spotlight - Config2 = 2, ///< Reflect Red, Distribution 0/1 - Config3 = 3, ///< Distribution 0/1, Fresnel - Config4 = 4, ///< Reflect Red/Green/Blue, Distribution 0/1, Spotlight - Config5 = 5, ///< Reflect Red/Green/Blue, Distribution 0, Fresnel, Spotlight - Config6 = 6, ///< Reflect Red, Distribution 0/1, Fresnel, Spotlight - - Config7 = 8, ///< Reflect Red/Green/Blue, Distribution 0/1, Fresnel, Spotlight - ///< NOTE: '8' is intentional, '7' does not appear to be a valid configuration - }; - - /// Selects which lighting components are affected by fresnel - enum class LightingFresnelSelector : u32 { - None = 0, ///< Fresnel is disabled - PrimaryAlpha = 1, ///< Primary (diffuse) lighting alpha is affected by fresnel - SecondaryAlpha = 2, ///< Secondary (specular) lighting alpha is affected by fresnel - Both = - PrimaryAlpha | - SecondaryAlpha, ///< Both primary and secondary lighting alphas are affected by fresnel - }; - - /// Factor used to scale the output of a lighting LUT - enum class LightingScale : u32 { - Scale1 = 0, ///< Scale is 1x - Scale2 = 1, ///< Scale is 2x - Scale4 = 2, ///< Scale is 4x - Scale8 = 3, ///< Scale is 8x - - Scale1_4 = 6, ///< Scale is 0.25x - Scale1_2 = 7, ///< Scale is 0.5x - }; - - enum class LightingLutInput : u32 { - NH = 0, // Cosine of the angle between the normal and half-angle vectors - VH = 1, // Cosine of the angle between the view and half-angle vectors - NV = 2, // Cosine of the angle between the normal and the view vector - LN = 3, // Cosine of the angle between the light and the normal vectors - SP = 4, // Cosine of the angle between the light and the inverse spotlight vectors - CP = 5, // Cosine of the angle between the tangent and projection of half-angle vectors - }; - - enum class LightingBumpMode : u32 { - None = 0, - NormalMap = 1, - TangentMap = 2, - }; - - union LightColor { - BitField<0, 10, u32> b; - BitField<10, 10, u32> g; - BitField<20, 10, u32> r; - - Math::Vec3f ToVec3f() const { - // These fields are 10 bits wide, however 255 corresponds to 1.0f for each color - // component - return Math::MakeVec((f32)r / 255.f, (f32)g / 255.f, (f32)b / 255.f); - } - }; - - /// Returns true if the specified lighting sampler is supported by the current Pica lighting - /// configuration - static bool IsLightingSamplerSupported(LightingConfig config, LightingSampler sampler) { - switch (sampler) { - case LightingSampler::Distribution0: - return (config != LightingConfig::Config1); - - case LightingSampler::Distribution1: - return (config != LightingConfig::Config0) && (config != LightingConfig::Config1) && - (config != LightingConfig::Config5); - - case LightingSampler::SpotlightAttenuation: - return (config != LightingConfig::Config2) && (config != LightingConfig::Config3); - - case LightingSampler::Fresnel: - return (config != LightingConfig::Config0) && (config != LightingConfig::Config2) && - (config != LightingConfig::Config4); - - case LightingSampler::ReflectRed: - return (config != LightingConfig::Config3); - - case LightingSampler::ReflectGreen: - case LightingSampler::ReflectBlue: - return (config == LightingConfig::Config4) || (config == LightingConfig::Config5) || - (config == LightingConfig::Config7); - default: - UNREACHABLE_MSG("Regs::IsLightingSamplerSupported: Reached unreachable section, " - "sampler should be one of Distribution0, Distribution1, " - "SpotlightAttenuation, Fresnel, ReflectRed, ReflectGreen or " - "ReflectBlue, instead got %i", - static_cast<int>(config)); - } - } - - struct LightSrc { - LightColor specular_0; // material.specular_0 * light.specular_0 - LightColor specular_1; // material.specular_1 * light.specular_1 - LightColor diffuse; // material.diffuse * light.diffuse - LightColor ambient; // material.ambient * light.ambient - - // Encoded as 16-bit floating point - union { - BitField<0, 16, u32> x; - BitField<16, 16, u32> y; - }; - union { - BitField<0, 16, u32> z; - }; - - // inverse spotlight direction vector, encoded as fixed1.1.11 - union { - BitField<0, 13, s32> spot_x; - BitField<16, 13, s32> spot_y; - }; - union { - BitField<0, 13, s32> spot_z; - }; - - INSERT_PADDING_WORDS(0x1); - - union { - BitField<0, 1, u32> directional; - BitField<1, 1, u32> two_sided_diffuse; // When disabled, clamp dot-product to 0 - BitField<2, 1, u32> geometric_factor_0; - BitField<3, 1, u32> geometric_factor_1; - } config; - - BitField<0, 20, u32> dist_atten_bias; - BitField<0, 20, u32> dist_atten_scale; - - INSERT_PADDING_WORDS(0x4); - }; - static_assert(sizeof(LightSrc) == 0x10 * sizeof(u32), "LightSrc structure must be 0x10 words"); - - LightSrc light[8]; - LightColor global_ambient; // Emission + (material.ambient * lighting.ambient) - INSERT_PADDING_WORDS(0x1); - BitField<0, 3, u32> max_light_index; // Number of enabled lights - 1 - - union { - BitField<2, 2, LightingFresnelSelector> fresnel_selector; - BitField<4, 4, LightingConfig> config; - BitField<22, 2, u32> bump_selector; // 0: Texture 0, 1: Texture 1, 2: Texture 2 - BitField<27, 1, u32> clamp_highlights; - BitField<28, 2, LightingBumpMode> bump_mode; - BitField<30, 1, u32> disable_bump_renorm; - } config0; - - union { - u32 raw; - - // Each bit specifies whether spot light attenuation should be applied for the corresponding - // light. - BitField<8, 8, u32> disable_spot_atten; - - BitField<16, 1, u32> disable_lut_d0; - BitField<17, 1, u32> disable_lut_d1; - // Note: by intuition, BitField<18, 1, u32> should be disable_lut_sp, but it is actually a - // dummy bit which is always set as 1. - BitField<19, 1, u32> disable_lut_fr; - BitField<20, 1, u32> disable_lut_rr; - BitField<21, 1, u32> disable_lut_rg; - BitField<22, 1, u32> disable_lut_rb; - - // Each bit specifies whether distance attenuation should be applied for the corresponding - // light. - BitField<24, 8, u32> disable_dist_atten; - } config1; - - bool IsDistAttenDisabled(unsigned index) const { - return (config1.disable_dist_atten & (1 << index)) != 0; - } - - bool IsSpotAttenDisabled(unsigned index) const { - return (config1.disable_spot_atten & (1 << index)) != 0; - } - - union { - BitField<0, 8, u32> index; ///< Index at which to set data in the LUT - BitField<8, 5, u32> type; ///< Type of LUT for which to set data - } lut_config; - - BitField<0, 1, u32> disable; - INSERT_PADDING_WORDS(0x1); - - // When data is written to any of these registers, it gets written to the lookup table of the - // selected type at the selected index, specified above in the `lut_config` register. With each - // write, `lut_config.index` is incremented. It does not matter which of these registers is - // written to, the behavior will be the same. - u32 lut_data[8]; - - // These are used to specify if absolute (abs) value should be used for each LUT index. When - // abs mode is disabled, LUT indexes are in the range of (-1.0, 1.0). Otherwise, they are in - // the range of (0.0, 1.0). - union { - BitField<1, 1, u32> disable_d0; - BitField<5, 1, u32> disable_d1; - BitField<9, 1, u32> disable_sp; - BitField<13, 1, u32> disable_fr; - BitField<17, 1, u32> disable_rb; - BitField<21, 1, u32> disable_rg; - BitField<25, 1, u32> disable_rr; - } abs_lut_input; - - union { - BitField<0, 3, LightingLutInput> d0; - BitField<4, 3, LightingLutInput> d1; - BitField<8, 3, LightingLutInput> sp; - BitField<12, 3, LightingLutInput> fr; - BitField<16, 3, LightingLutInput> rb; - BitField<20, 3, LightingLutInput> rg; - BitField<24, 3, LightingLutInput> rr; - } lut_input; - - union { - BitField<0, 3, LightingScale> d0; - BitField<4, 3, LightingScale> d1; - BitField<8, 3, LightingScale> sp; - BitField<12, 3, LightingScale> fr; - BitField<16, 3, LightingScale> rb; - BitField<20, 3, LightingScale> rg; - BitField<24, 3, LightingScale> rr; - - static float GetScale(LightingScale scale) { - switch (scale) { - case LightingScale::Scale1: - return 1.0f; - case LightingScale::Scale2: - return 2.0f; - case LightingScale::Scale4: - return 4.0f; - case LightingScale::Scale8: - return 8.0f; - case LightingScale::Scale1_4: - return 0.25f; - case LightingScale::Scale1_2: - return 0.5f; - } - return 0.0f; - } - } lut_scale; - - INSERT_PADDING_WORDS(0x6); - - union { - // There are 8 light enable "slots", corresponding to the total number of lights supported - // by Pica. For N enabled lights (specified by register 0x1c2, or 'src_num' above), the - // first N slots below will be set to integers within the range of 0-7, corresponding to the - // actual light that is enabled for each slot. - - BitField<0, 3, u32> slot_0; - BitField<4, 3, u32> slot_1; - BitField<8, 3, u32> slot_2; - BitField<12, 3, u32> slot_3; - BitField<16, 3, u32> slot_4; - BitField<20, 3, u32> slot_5; - BitField<24, 3, u32> slot_6; - BitField<28, 3, u32> slot_7; - - unsigned GetNum(unsigned index) const { - const unsigned enable_slots[] = {slot_0, slot_1, slot_2, slot_3, - slot_4, slot_5, slot_6, slot_7}; - return enable_slots[index]; - } - } light_enable; - - INSERT_PADDING_WORDS(0x26); -}; - -static_assert(sizeof(LightingRegs) == 0xC0 * sizeof(u32), "LightingRegs struct has incorrect size"); - -} // namespace Pica |