#pragma once /* GameEngine and Editor by John Ryland Copyright (c) 2023 */ #include #include namespace GameRuntime { enum class VariableTypeEnum { E_Void, E_Bool, E_Enum, E_String, E_Number, E_EncodedNumber, E_Color, E_Entity, E_Asset, E_Struct, E_Component, E_Max }; enum UnifiedTypeEnum { // Extended/unified variable+number types //E_Void, // label //E_Bool8, //E_Entity64, //E_UInt8, //E_UInt16, //E_UInt32, //E_UInt64, //E_Int8, //E_Int16, //E_Int32, //E_Int64, //E_Enum8, //E_Enum16, //E_Enum32, //E_Enum64, //E_String64, // 8 characters //E_String128, // 16 characters //E_String256, // 32 characters //E_String512, // 64 characters //E_String1024, // 128 characters //E_String2048, // 256 characters //E_Color16_R5G6B5, //E_Color16_R5G5B5A1, //E_Color24_R8G8B8, //E_Color32_R8G8B8, //E_Color32_R8G8B8A8, //E_ColorFloat128_R32G32B32A32, //E_ColorFloat256_R64G64B64A64, //E_Float16, //E_Float32, //E_Float64, // Scalar //E_Float128_X32Y32Z32W32, // Vector //E_Float256_X64Y64Z64W64, // Vector //E_Scientific32, //E_Scientific64, //E_Coordinate128_X32Y32Z32W32 //E_Direction128_X32Y32Z32W32 //E_Normal128_X32Y32Z32W32 //E_EulerRadianAngles128_X32Y32Z32W32 //E_EulerDegreeAngles128_X32Y32Z32W32 //E_Quaternion128_X32Y32Z32W32 //E_Angle8, //E_Angle16, //E_Angle32, //E_Angle64, //E_Ratio8, //E_Ratio16, //E_Ratio32, //E_Ratio64, //E_GeometryShaderAssetId32, //E_VertexShaderAssetId32, //E_FragmentShaderAssetId32, //E_TessellationShaderAssetId32, //E_ComputeShaderAssetId32, //E_SPIRVShaderAssetId32, //E_AudioAssetId32, //E_MeshAssetId32, //E_TextureAssetId32, //E_Struct8, // 1 byte alignment //E_Struct16, // 2 byte alignment //E_Struct32, //E_Struct64, //E_Struct128, // 16 byte alignment //E_Struct256, // 32 byte alignment //E_Struct512 // 64 byte alignment (cache line) //E_UnixTimeNano64 // Nanosceonds since UNIX epoch as 64bit value 1 January 1970 // DateTime ideas: // Age of the universe: 13.7 billion years old // Epoch of 15 billion years ago -> 15,000,000,000 yrs (36-bits) // 2^32 is 4,294,967,296 // 2^64 is 18,446,744,073,709,551,616 // 60*60*24 = 86400 second / day // 31,536,000 seconds / year (25-bits) // 31,536,000,000,000,000 nanoseconds / year (55-bits) // 18,446,744,073,709,551,616 / 31,536,000,000,000,000 = 584 // 584 years without rollover of nanoseconds in a 64bit value // Idea: // 1-bit as flag for nanosecond datetime or seconds // if 1 -> 38-bits for the year, 25-bits for the second of the year (epoch of -15 billion years) // if 0 -> 8-bits for the year, 55-bits for the nanosecond of the year (epoch of 1 Jan 1970) (only contemporary times need nanoseconds) // might be easier to deal with leap seconds etc if the year is split out }; enum NumberTypeEnum { E_UInt8, E_UInt16, E_UInt32, E_UInt64, E_Int8, E_Int16, E_Int32, E_Int64, E_Float32, E_Float64, E_Angle, E_Ratio }; /* enum NumberPurposeEnum { E_Numeric, // Scalar E_Count, E_Scientific, E_Normal, E_Ratio, E_Color, E_Boolean, E_Void, }; enum NumberRangeEnum { E_Zero, // void E_BinaryZeroOrOne, // bool E_ZeroToOne, // 0.0 to 1.0 ratio E_Ratio = E_ZeroToOne, E_MinusOneToPlusOne, // -1.0 to 1.0 normalized range E_NormalComponent = E_MinusOneToPlusOne, E_MinusPiToPlusPi, // radian angle E_Byte, E_Character = E_Byte, E_Octet = E_Byte, }; */ enum ColorTypeEnum { E_RGB32, E_RGBA32, // This might be more file format related E_R8G8B8, E_R16G15B16, E_R32G32B32, E_R8G8B8A8, E_B8G8R8A8, E_R16G15B16A16, E_R32G32B32A32, E_R32G32B32A32_FLOAT, E_R32G32B32A32_DOUBLE, }; enum ShaderTypeEnum { E_GeometryShader, E_VertexShader, E_FragmentShader, E_TessellationShader, E_ComputeShader, E_SPIRVShader }; enum AssetTypeEnum { E_Audio, E_Mesh, E_Shader, E_Texture }; struct StringTable { uint64_t count; char text[]; }; struct String { uint32_t stringTableOffset; uint32_t stringLength; }; struct NameValue { String name; uint64_t value; }; struct NameValueTable { uint64_t count; NameValue values[]; }; struct NumberDescription { NumberTypeEnum numberType; }; struct EntityDescription { }; struct StringDescription { uint32_t maximumCharacterCount; }; struct EnumDescription { uint32_t numberOfEnumValues; uint32_t nameValueTableOffset; }; struct StructDescription { uint32_t numberOfFields; uint32_t variableDescriptionTableOffset; }; struct ColorDescription { ColorTypeEnum colorType; }; struct AssetDescription { AssetTypeEnum assetType; }; // This might be better for file formats than for component types struct EncodedNumberDescription { bool hasNullValue; // Can it encode a special 'NoValue' value bool hasSignBit; uint8_t exponentBits; uint8_t mantissaBits; // significant int32_t exponentBias; // For 128bit wide floats, the exponent can be more than 16 bits so we need a 32bit value for this double scale; // Can this handle the exponentBias for us? I am thinking it can't. double bias; }; struct VariableDescription { uint64_t uid; String name; VariableTypeEnum variableType; union { NumberDescription numberDescription; // EncodedNumberDescription encodedNumberDescription; StringDescription stringDescription; EnumDescription enumDescription; EntityDescription entityDescription; StructDescription structDescription; StructDescription componentDescription; ColorDescription colorDescription; AssetDescription assetDescription; }; }; struct VariableDescriptionTable { uint64_t count; VariableDescription variables[]; }; struct Schema { StringTable* strings; NameValueTable* enums; VariableDescriptionTable* variables; }; struct SchemaFileFormatHeader { uint32_t fileFormatCode; uint32_t formatVersion; uint32_t fileSize; uint32_t headerSize; uint32_t stringTableSize; uint32_t stringTableFileOffset; uint32_t nameValueTableSize; uint32_t nameValueTableFileOffset; uint32_t variableDescriptionTableSize; uint32_t variableDescriptionTableFileOffset; }; Schema* LoadSchemaFromFile(const char* schemaFileName); void DestroySchema(Schema* schema); size_t CalculateEnumSize(const Schema& schema, const EnumDescription& enumDesc); size_t CalculateNumberSize(const Schema& schema, const NumberTypeEnum& numberDesc); size_t CalculateFieldSize(const Schema& schema, size_t structOffset, const VariableDescription& fieldDesc); size_t CalculateComponentSize(const Schema& schema, const StructDescription& fields); } // GameRuntime namespace