#ifndef GRAPHICS_COPPER_H
#define GRAPHICS_COPPER_H
/****** copper.h ****************************************************/
/*                                                                  */
/*              Commodore-Amiga, Inc.                               */
/*                                                                  */
/*                  Modification History                            */
/*  date    :   author :    Comments                                */
/*  -------     ------      --------------------------------------- */
/*  8-24-84     Dale        added this header file                  */
/*  9-11-84     Dale        redefined with unions                   */
/*  2-09-85     Dale        made #defines for union ignorance       */
/********************************************************************/

#define COPPER_MOVE 0       /* pseude opcode for move #XXXX,dir */
#define COPPER_WAIT 1       /* pseudo opcode for wait y,x */
#define CPRNXTBUF   2       /* continue processing with next buffer */
#define CPR_NT_LOF  0x8000  /* copper instruction only for short frames */
#define CPR_NT_SHT  0x4000  /* copper instruction only for long frames */
struct CopIns
{
    short   OpCode; /* 0 = move, 1 = wait */
    union
    {
    struct CopList *nxtlist;
    struct 
    {
   union
   {
   SHORT   VWaitPos;        /* vertical beam wait */
   SHORT   DestAddr;        /* destination address of copper move */
   } u1;
   union
   {
   SHORT   HWaitPos;        /* horizontal beam wait position */
   SHORT   DestData;        /* destination immediate data to send */
   } u2;
    } u4;
    } u3;
};
/* shorthand for above */
#define NXTLIST     u3.nxtlist
#define VWAITPOS    u3.u4.u1.VWaitPos
#define DESTADDR    u3.u4.u1.DestAddr
#define HWAITPOS    u3.u4.u2.HWaitPos
#define DESTDATA    u3.u4.u2.DestData


/* structure of cprlist that points to list that hardware actually executes */
struct cprlist
{
    struct cprlist *Next;
    UWORD   *start;         /* start of copper list */
    SHORT   MaxCount;       /* number of long instructions */
};

struct CopList
{
    struct  CopList *Next;  /* next block for this copper list */
    struct  CopList *_CopList;  /* system use */
    struct  ViewPort *_ViewPort;    /* system use */
    struct  CopIns *CopIns; /* start of this block */
    struct  CopIns *CopPtr; /* intermediate ptr */
    UWORD   *CopLStart;     /* mrgcop fills this in for Long Frame*/
    UWORD   *CopSStart;     /* mrgcop fills this in for Short Frame*/
    SHORT   Count;          /* intermediate counter */
    SHORT   MaxCount;       /* max # of copins for this block */
    SHORT   DyOffset;       /* offset this copper list vertical waits */
};

struct UCopList
{
    struct UCopList *Next;
    struct CopList  *FirstCopList; /* head node of this copper list */
    struct CopList  *CopList;      /* node in use */
};

struct copinit
{
    UWORD diagstrt[4];      /* copper list for first bitplane */
    UWORD sprstrtup[(2*8*2)+2+(2*2)+2];
    UWORD   sprstop[2];
};

#endif