TShader.h

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#pragma once
#include "TOrderTable.h"
 
TOSHI_NAMESPACE_START
 
class TShader : public TObject
{
public:
    TDECLARE_CLASS( TShader, TObject );
 
public:
    using State = TUINT32;
    enum State_ : State
    {
        State_None      = 0,
        State_Created   = BITFLAG( 0 ),
        State_Validated = BITFLAG( 1 ),
    };
 
    class TShaderList
    {
    public:
        TShaderList()
            : m_pRoot( TNULL ) {}
 
        void AddShader( TShader* pShader );
        void RemoveShader( TShader* pShader );
 
        TShader* GetRootShader() { return m_pRoot; }
 
    private:
        TShader* m_pRoot;
    };
 
public:
    TShader();
    ~TShader();
 
    //-----------------------------------------------------------------------------
    // Own methods
    //-----------------------------------------------------------------------------
 
    /* Called before shader is destroyed. */
    virtual void OnDestroy();
 
    /* Additional call to flush something more? */
    virtual void Flush();
 
    /* Setup render state before rendering meshes. */
    virtual void StartFlush() = 0;
 
    /* Restore render states after all rendering is done. */
    virtual void EndFlush() = 0;
 
    /* Do some initial setups, f.e. create order tables. */
    virtual TBOOL Create();
 
    /* Make sure the shader is ready to use. */
    virtual TBOOL Validate();
 
    /* We don't need the shader, at least for now. */
    virtual void Invalidate();
 
    /* Why? I don't know */
    virtual TBOOL TryInvalidate() { return TTRUE; }
 
    /* Why? I don't know */
    virtual TBOOL TryValidate() { return TTRUE; }
 
    /* Renders the mesh stored in the render packet containing other useful info. */
    virtual void Render( TRenderPacket* a_pRenderPacket ) = 0;
 
    TBOOL IsCreated() const { return m_State & State_Created; }
    TBOOL IsValidated() const { return m_State & State_Validated; }
 
    TShader* GetNextShader() { return m_pNextShader; }
 
public:
    inline static TShaderList sm_oShaderList;
 
private:
    State    m_State;
    TShader* m_pNextShader;
};
 
TOSHI_NAMESPACE_END