CWE-ou-minkata/Sources/Plasma/PubUtilLib/plSurface/plShaderTable.h

/*==LICENSE==*

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Copyright (C) 2011  Cyan Worlds, Inc.

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it under the terms of the GNU General Public License as published by
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Additional permissions under GNU GPL version 3 section 7

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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/

#ifndef plShaderTable_inc
#define plShaderTable_inc

#include "hsTemplates.h"

// When adding to the compiled table, make sure
// you add the include in plShaderTable.cpp, or you'll
// compile fine but have a nil shader (FFP) at runtime.
namespace plShaderID
{
    enum ID
    {
        Unregistered = 0,
            vs_WaveFixedFin6,   //OBSOLETE
            ps_WaveFixed,
            vs_CompCosines,
            ps_CompCosines,     //OBSOLETE
            vs_ShoreLeave6,     //OBSOLETE
            ps_ShoreLeave6,
            vs_WaveRip,         //OBSOLETE
            ps_WaveRip,
            vs_WaveDec1Lay,     //OBSOLETE
            vs_WaveDec2Lay11,   //OBSOLETE
            vs_WaveDec2Lay12,   //OBSOLETE
            vs_WaveDecEnv,      //OBSOLETE
            ps_CbaseAbase,
            ps_CalphaAbase,
            ps_CalphaAMult,
            ps_CalphaAadd,
            ps_CaddAbase,
            ps_CaddAMult,
            ps_CaddAAdd,
            ps_CmultAbase,
            ps_CmultAMult,
            ps_CmultAAdd,
            ps_WaveDecEnv,
            vs_WaveGraph2,
            ps_WaveGraph,
            vs_WaveGridFin,     //OBSOLETE
            ps_WaveGrid,        //OBSOLETE
            vs_BiasNormals,
            ps_BiasNormals,
            vs_ShoreLeave7,
            vs_WaveRip7,
            ps_MoreCosines,
            vs_WaveDec1Lay_7,
            vs_WaveDec2Lay11_7,
            vs_WaveDec2Lay12_7,
            vs_WaveDecEnv_7,
            vs_WaveFixedFin7,
            vs_GrassShader,
            ps_GrassShader,

            kNumShaders
    };
};


class plShaderDecl
{
protected:
    const plShaderID::ID    fID;
    const uint32_t            fbyteLen;
    const uint8_t* const      fCodes;
    const char* const       fFileName;

public:
    plShaderDecl(const char* const fname, plShaderID::ID id = plShaderID::Unregistered, uint32_t byteLen = 0, const uint8_t* const codes = 0L) : fID(id), fbyteLen(byteLen), fCodes(codes), fFileName(fname) {}
    // Data (fCodes) is never deleted, It points to memory compiled in.

    plShaderID::ID GetID() const { return fID; }
    uint32_t GetByteLen() const { return fbyteLen; }
    const uint8_t* GetCodes() const { return fCodes; }
    const char* GetFileName() const { return fFileName; }
};

class plShaderTableInst
{
protected:
    enum
    {
        kLoadFromFile       = 0x1
    };

    uint32_t                          fFlags;

    const plShaderDecl*             fTable[plShaderID::kNumShaders];

    plShaderTableInst();

    bool LoadFromFile() const { return 0 != (fFlags & kLoadFromFile); }
    void SetLoadFromFile(bool on) { if(on) fFlags |= kLoadFromFile; else fFlags &= ~kLoadFromFile; }

    const plShaderDecl* Decl(plShaderID::ID id) const { return fTable[id]; }

    void Register(const plShaderDecl* decl);

    bool IsRegistered(plShaderID::ID id) const { return (id == 0) || ((id < plShaderID::kNumShaders) && fTable[id]); }

public:
    virtual ~plShaderTableInst();

    friend class plShaderTable;
};

class plShaderTable
{
protected:
    static plShaderTableInst* fInst;

    static plShaderTableInst& IMakeInstance();

    static plShaderTableInst& Instance() { return fInst ? *fInst : IMakeInstance(); }

public:

    static bool LoadFromFile() { return Instance().LoadFromFile(); }
    static void SetLoadFromFile(bool on) { Instance().SetLoadFromFile(on); }
    
    static const plShaderDecl* Decl(plShaderID::ID id) { return Instance().Decl(id); }

    static void Register(const plShaderDecl* decl) { Instance().Register(decl); }

    static bool IsRegistered(plShaderID::ID id) { return Instance().IsRegistered(id); }
};

class plShaderRegister
{
public:
    plShaderRegister(const plShaderDecl* decl) { plShaderTable::Register(decl); }
};


#endif // plShaderTable_inc