KSG-Framework/DX12Shader.h

#pragma once

#include "DX12Buffer.h"
#include "Shader.h"

struct ID3D12Device;
struct ID3D12GraphicsCommandList;
struct D3D12_INPUT_ELEMENT_DESC;
struct D3D12_ROOT_PARAMETER1;
struct D3D12_CONSTANT_BUFFER_VIEW_DESC;

namespace Framework
{
    class DX12Shader : public Shader
    {
    protected:
        ID3D12Device* device;
        DX12CopyCommandQueue* copy;
        DX12DirectCommandQueue* direct;
        unsigned char* shaderByteBuffer;
        int byteBufferSize;

    public:
        DX12Shader(ID3D12Device* device,
            DX12CopyCommandQueue* copy,
            DX12DirectCommandQueue* direct);
        virtual ~DX12Shader();
        //! Creates a constant buffer that passes constant data to the shader.
        //! A maximum of 14 buffers can be created.
        //!  zD3d11Device: The device with which the buffer should be created
        //! \param size The size of the buffer in bytes
        //! \param index The position of the buffer in the buffer array. An
        //! existing buffer will be replaced. Buffer 1 cannot be created
        //! if buffer 0 has not been created yet, etc.
        virtual bool createConstBuffer(int size, int index) override;
        //! Sets the compiled shader
        //!  zD3d11Device: The device with which the shader should be created
        //! \param bytes The bytes of the compiled code
        //! \param length The length of the byte array
        //! \return true if bytes is valid, false otherwise
        bool setCompiledByteArray(unsigned char* bytes, int length) override;
        //! After calling this function, this shader is used as a pixel shader
        //!  zD3d11Context: The context object with which the shader should
        //!  be used
        void useShader() override;
        //! Returns the compiled bytes
        unsigned char* getCompiledShader() const;
        //! Returns the number of compiled bytes
        int getCompiledLength() const;
        //! Creates the RootParameter for a constant buffer
        //! \param index The index of the buffer
        //! \param view Contains the position and size of the buffer
        //! in memory after the call
        virtual void getViewDesc(
            int index, D3D12_CONSTANT_BUFFER_VIEW_DESC& view);
    };

    class DX12PixelShader : public DX12Shader
    {
    public:
        DX12PixelShader(ID3D12Device* device,
            DX12CopyCommandQueue* copy,
            DX12DirectCommandQueue* direct);
    };

    class DX12VertexShader : public DX12Shader
    {
    private:
        D3D12_INPUT_ELEMENT_DESC* inputLayout;
        int inputLayoutSize;

    public:
        //! Constructor
        DX12VertexShader(ID3D12Device* device,
            DX12CopyCommandQueue* copy,
            DX12DirectCommandQueue* direct);
        //! Destructor
        ~DX12VertexShader();
        //! Creates an input layout for the shader.
        //! May only be called after compile.
        //!  zD3d11Device: The device with which the layout should be created
        //! \param descArray An array with initialization data
        //! \param anz The number of elements in the array
        bool createInputLayout(D3D12_INPUT_ELEMENT_DESC* descArray, int anz);
        //! Returns the number of input parameters of the shader
        int getInputLayoutSize() const;
        //! Returns a list of formats for each input value
        D3D12_INPUT_ELEMENT_DESC* zInputLayout() const;
    };
} // namespace Framework