259 lines
7.7 KiB
C++
259 lines
7.7 KiB
C++
// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include "boost/serialization/split_member.hpp"
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#include "common/bit_field.h"
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#include "common/common_types.h"
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#include "common/vector_math.h"
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#include "video_core/video_core.h"
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#include "video_core/geometry_pipeline.h"
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#include "video_core/primitive_assembly.h"
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#include "video_core/regs.h"
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#include "video_core/shader/shader.h"
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// Boost::serialization doesn't like union types for some reason,
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// so we need to mark arrays of union values with a special serialization method
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template<typename Value, size_t Size>
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struct UnionArray : public std::array<Value, Size>
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{
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private:
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template<class Archive>
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void serialize(Archive& ar, const unsigned int)
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{
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static_assert(sizeof(Value) == sizeof(u32));
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ar & *static_cast<u32 (*)[Size]>(static_cast<void *>(this->data()));
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}
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friend class boost::serialization::access;
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};
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namespace Pica {
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/// Struct used to describe current Pica state
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struct State {
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State();
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void Reset();
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/// Pica registers
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Regs regs;
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Shader::ShaderSetup vs;
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Shader::ShaderSetup gs;
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Shader::AttributeBuffer input_default_attributes;
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struct ProcTex {
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union ValueEntry {
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u32 raw;
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// LUT value, encoded as 12-bit fixed point, with 12 fraction bits
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BitField<0, 12, u32> value; // 0.0.12 fixed point
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// Difference between two entry values. Used for efficient interpolation.
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// 0.0.12 fixed point with two's complement. The range is [-0.5, 0.5).
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// Note: the type of this is different from the one of lighting LUT
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BitField<12, 12, s32> difference;
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float ToFloat() const {
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return static_cast<float>(value) / 4095.f;
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}
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float DiffToFloat() const {
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return static_cast<float>(difference) / 4095.f;
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}
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};
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union ColorEntry {
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u32 raw;
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BitField<0, 8, u32> r;
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BitField<8, 8, u32> g;
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BitField<16, 8, u32> b;
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BitField<24, 8, u32> a;
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Common::Vec4<u8> ToVector() const {
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return {static_cast<u8>(r), static_cast<u8>(g), static_cast<u8>(b),
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static_cast<u8>(a)};
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}
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};
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union ColorDifferenceEntry {
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u32 raw;
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BitField<0, 8, s32> r; // half of the difference between two ColorEntry
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BitField<8, 8, s32> g;
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BitField<16, 8, s32> b;
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BitField<24, 8, s32> a;
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Common::Vec4<s32> ToVector() const {
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return Common::Vec4<s32>{r, g, b, a} * 2;
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}
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};
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UnionArray<ValueEntry, 128> noise_table;
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UnionArray<ValueEntry, 128> color_map_table;
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UnionArray<ValueEntry, 128> alpha_map_table;
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UnionArray<ColorEntry, 256> color_table;
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UnionArray<ColorDifferenceEntry, 256> color_diff_table;
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private:
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive & ar, const unsigned int file_version)
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{
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ar & noise_table;
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ar & color_map_table;
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ar & alpha_map_table;
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ar & color_table;
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ar & color_diff_table;
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}
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} proctex;
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struct Lighting {
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union LutEntry {
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// Used for raw access
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u32 raw;
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// LUT value, encoded as 12-bit fixed point, with 12 fraction bits
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BitField<0, 12, u32> value; // 0.0.12 fixed point
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// Used for efficient interpolation.
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BitField<12, 11, u32> difference; // 0.0.11 fixed point
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BitField<23, 1, u32> neg_difference;
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float ToFloat() const {
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return static_cast<float>(value) / 4095.f;
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}
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float DiffToFloat() const {
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float diff = static_cast<float>(difference) / 2047.f;
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return neg_difference ? -diff : diff;
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}
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template<class Archive>
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void serialize(Archive & ar, const unsigned int file_version)
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{
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ar & raw;
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}
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};
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std::array<UnionArray<LutEntry, 256>, 24> luts;
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} lighting;
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struct {
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union LutEntry {
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// Used for raw access
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u32 raw;
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BitField<0, 13, s32> difference; // 1.1.11 fixed point
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BitField<13, 11, u32> value; // 0.0.11 fixed point
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float ToFloat() const {
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return static_cast<float>(value) / 2047.0f;
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}
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float DiffToFloat() const {
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return static_cast<float>(difference) / 2047.0f;
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}
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};
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UnionArray<LutEntry, 128> lut;
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} fog;
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/// Current Pica command list
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struct {
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PAddr addr; // This exists only for serialization
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const u32* head_ptr;
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const u32* current_ptr;
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u32 length;
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} cmd_list;
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/// Struct used to describe immediate mode rendering state
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struct ImmediateModeState {
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// Used to buffer partial vertices for immediate-mode rendering.
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Shader::AttributeBuffer input_vertex;
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// Index of the next attribute to be loaded into `input_vertex`.
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u32 current_attribute = 0;
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// Indicates the immediate mode just started and the geometry pipeline needs to reconfigure
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bool reset_geometry_pipeline = true;
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private:
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive & ar, const unsigned int file_version)
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{
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ar & input_vertex;
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ar & current_attribute;
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ar & reset_geometry_pipeline;
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}
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} immediate;
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// the geometry shader needs to be kept in the global state because some shaders relie on
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// preserved register value across shader invocation.
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// TODO: also bring the three vertex shader units here and implement the shader scheduler.
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Shader::GSUnitState gs_unit;
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GeometryPipeline geometry_pipeline;
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// This is constructed with a dummy triangle topology
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PrimitiveAssembler<Shader::OutputVertex> primitive_assembler;
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int vs_float_regs_counter = 0;
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u32 vs_uniform_write_buffer[4]{};
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int gs_float_regs_counter = 0;
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u32 gs_uniform_write_buffer[4]{};
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int default_attr_counter = 0;
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u32 default_attr_write_buffer[3]{};
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private:
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive & ar, const unsigned int file_version)
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{
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ar & regs.reg_array;
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ar & vs;
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ar & gs;
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ar & input_default_attributes;
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ar & proctex;
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ar & lighting.luts;
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ar & fog.lut;
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ar & cmd_list.addr;
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ar & cmd_list.length;
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ar & immediate;
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ar & gs_unit;
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ar & geometry_pipeline;
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ar & primitive_assembler;
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ar & vs_float_regs_counter;
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ar & vs_uniform_write_buffer;
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ar & gs_float_regs_counter;
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ar & gs_uniform_write_buffer;
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ar & default_attr_counter;
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ar & default_attr_write_buffer;
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boost::serialization::split_member(ar, *this, file_version);
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}
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template<class Archive>
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void save(Archive & ar, const unsigned int file_version) const
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{
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ar << static_cast<u32>(cmd_list.current_ptr - cmd_list.head_ptr);
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}
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template<class Archive>
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void load(Archive & ar, const unsigned int file_version)
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{
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u32 offset{};
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ar >> offset;
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cmd_list.head_ptr = (u32*)VideoCore::g_memory->GetPhysicalPointer(cmd_list.addr);
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cmd_list.current_ptr = cmd_list.head_ptr + offset;
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}
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};
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extern State g_state; ///< Current Pica state
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} // namespace Pica
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