Pipeline.hpp

/*
Copyright (C) 2017-2019,2021,2025,2026 Rodrigo Jose Hernandez Cordoba
 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 
http://www.apache.org/licenses/LICENSE-2.0
 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef AEONGAMES_PIPELINE_H
#define AEONGAMES_PIPELINE_H
 
#include <cstdint>
#include <string>
#include <string_view>
#include <vector>
#include <array>
#include <regex>
#include <tuple>
#include "aeongames/Platform.hpp"
#include "aeongames/Material.hpp"
#include "aeongames/Resource.hpp"
#include <functional>
 
namespace AeonGames
{
    class PipelineMsg;
    enum Topology
    {
        UNDEFINED = 0,                  
        POINT_LIST,                     
        LINE_STRIP,                     
        LINE_LIST,                      
        TRIANGLE_STRIP,                 
        TRIANGLE_FAN,                   
        TRIANGLE_LIST,                  
        LINE_LIST_WITH_ADJACENCY,       
        LINE_STRIP_WITH_ADJACENCY,      
        TRIANGLE_LIST_WITH_ADJACENCY,   
        TRIANGLE_STRIP_WITH_ADJACENCY,  
        PATCH_LIST,                     
    };
#if 0
    class MaterialMsg;
 
    enum AttributeBits
    {
        VertexPositionBit = 0x1,
        VertexNormalBit = 0x2,
        VertexTangentBit = 0x4,
        VertexBitangentBit = 0x8,
        VertexUVBit = 0x10,
        VertexWeightIdxBit = 0x20,
        VertexWeightBit = 0x40,
        VertexColorBit = 0x80,
        VertexAllBits = VertexPositionBit |
                        VertexNormalBit |
                        VertexTangentBit |
                        VertexBitangentBit |
                        VertexUVBit |
                        VertexWeightIdxBit |
                        VertexWeightBit |
                        VertexColorBit
    };
 
    enum AttributeFormat
    {
        Vector2Float,
        Vector3Float,
        Vector4Byte,
        Vector4ByteNormalized,
    };
 
    enum UniformType
    {
        SCALAR_FLOAT,
        SCALAR_UINT,
        SCALAR_INT,
        VECTOR_FLOAT_2,
        VECTOR_FLOAT_3,
        VECTOR_FLOAT_4,
    };
#endif

    enum ShaderType
    {
        VERT = 0, 
        FRAG,     
        COMP,     
        TESC,     
        TESE,     
        GEOM,     
        COUNT     
    };

    const std::unordered_map<ShaderType, const char*> ShaderTypeToString
    {
        { VERT, "vertex" },
        { FRAG, "fragment" },
        { COMP, "compute" },
        { TESC, "tessellation control" },
        { TESE, "tessellation evaluation" },
        { GEOM, "geometry" }
    };

    class Pipeline : public Resource
    {
    public:
        static const uint32_t TOPOLOGY_CLASS_POINT{1};    
        static const uint32_t TOPOLOGY_CLASS_LINE{2};     
        static const uint32_t TOPOLOGY_CLASS_TRIANGLE{4}; 
        static const uint32_t TOPOLOGY_CLASS_PATCH{8};    

        DLL Pipeline();
        DLL virtual ~Pipeline();
        DLL void LoadFromMemory ( const void* aBuffer, size_t aBufferSize ) final;
        DLL void Unload() final;
        DLL uint32_t GetTopologyClass() const;
#if 0
        DLL const std::string& GetVertexShaderCode() const;
        DLL const std::string& GetFragmentShaderCode() const;
        DLL const std::vector<std::tuple<UniformType, std::string >> & GetUniformDescriptors() const;
        DLL const std::vector<std::string>& GetSamplerDescriptors() const;
        DLL std::string GetProperties () const;
        DLL std::string GetAttributes () const;
        DLL uint32_t GetAttributeBitmap() const;
#endif
        DLL const std::string_view GetShaderCode ( ShaderType aType ) const;

        DLL void LoadFromPBMsg ( const PipelineMsg& aPipelineMsg );
    private:
#if 0
        Topology mTopology {};
        std::string mVertexShaderCode{};
        std::string mFragmentShaderCode{};
        std::vector<std::tuple<UniformType, std::string >> mUniformDescriptors{};
        std::vector<std::string> mSamplerDescriptors{};
#endif
        std::array<std::string, ShaderType::COUNT> mShaderCode {};
        uint32_t mTopologyClass{ TOPOLOGY_CLASS_TRIANGLE };
    };
}
#endif