TrRndDifferentialTransition.h

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// Copyright (C) 2002-2022, Open Design Alliance (the "Alliance"). 
// All rights reserved. 
// 
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// with their copyright notices:
//   
//   This application incorporates Open Design Alliance software pursuant to a license 
//   agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2022 by Open Design Alliance. 
//   All rights reserved.
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// acknowledge and accept the above terms.
// GLES2 differential rendering state transitions container
 
#ifndef ODTRRNDDIFFERENTIALTRANSITION
#define ODTRRNDDIFFERENTIALTRANSITION
 
#include "TD_PackPush.h"
 
#include "OdVector.h"
#include "../TrVisStaticSharedPtr.h"
 
class OdTrRndDifferentialTransition
{
  public:
    union Var
    {
      bool m_bool;
      OdInt32 m_int32;
      OdUInt32 m_uint32;
      float m_float;
    };
    struct Op
    {
      OdUInt32 m_opcode;
      Var m_var;
    };
    struct Ops
    {
      Op m_fwd;
      Op m_back;
    };
  protected:
    OdVector<Ops, OdMemoryAllocator<Ops> > m_ops;
  public:
    OdTrRndDifferentialTransition() { }
    ~OdTrRndDifferentialTransition() { }
 
    Op make_op(OdUInt32 opcode) { Op op; op.m_opcode = opcode; return op; }
    Op make_op(OdUInt32 opcode, bool val) { Op op; op.m_opcode = opcode; op.m_var.m_bool = val; return op; }
    Op make_op(OdUInt32 opcode, OdInt32 val) { Op op; op.m_opcode = opcode; op.m_var.m_int32 = val; return op; }
    Op make_op(OdUInt32 opcode, OdUInt32 val) { Op op; op.m_opcode = opcode; op.m_var.m_uint32 = val; return op; }
    Op make_op(OdUInt32 opcode, float val) { Op op; op.m_opcode = opcode; op.m_var.m_float = val; return op; }
 
    void push_ops(const Op &fwd, const Op &back, bool bFwd = true)
    { 
      Ops ops;
      if (bFwd) {ops.m_fwd = fwd; ops.m_back = back;}
      else {ops.m_fwd = back; ops.m_back = fwd;}
      m_ops.push_back(ops);
    }
    void finalize() { m_ops.setPhysicalLength(m_ops.size()); }
 
    class Iterator
    {
      bool m_bForward;
      const Ops *m_pOps;
      OdUInt32 m_nOps;
      OdInt32 m_nCaret;
      public:
        Iterator(const OdVector<Ops, OdMemoryAllocator<Ops> > &ops, bool bForward)
          : m_bForward(bForward)
        {
          m_pOps = ops.getPtr(); m_nOps = ops.size();
          m_nCaret = (bForward) ? 0 : OdInt32(m_nOps) - 1;
        }
        bool done() const { return (m_nCaret < 0) || (OdUInt32(m_nCaret) >= m_nOps); }
        bool next() { if (m_bForward) m_nCaret++; else m_nCaret--; return done(); }
        bool back() { if (m_bForward) m_nCaret--; else m_nCaret++; return done(); }
        const Op &op() const { return (m_bForward) ? m_pOps[m_nCaret].m_fwd : m_pOps[m_nCaret].m_back; }
    };
    Iterator iterator(bool bForward) const { return Iterator(m_ops, bForward); }
};
 
typedef OdSharedPtr<OdTrRndDifferentialTransition> OdTrRndDifferentialTransitionPtr;
 
#include "TD_PackPop.h"
 
#endif // ODTRRNDDIFFERENTIALTRANSITION