(******************************************************************************)
(*                              SAMPLE06.MOD                                  *)
(*                                                                            *)
(*                    Defining a Custom Display Bitmap                        *)
(* Taken from SAMPLE06.PAS - Metagraphics Software Corporation (c) 1987-1989  *)
(*                                                                            *)
(* PSW 11/01/90 08:18pm                                                       *)
(******************************************************************************)

MODULE Sample06;
(*
 *  Graphix
 *  Release 3.7
 *  (c) Copyright 1986-1992 PMI
 *  Green Bay, Wisconsin
 *  (414) 468-6040
 *  All rights reserved
 *
 *)

  IMPORT GrQry;
  IMPORT GrConst;
  IMPORT GrPorts;
  IMPORT Meta;
  IMPORT IO;

  FROM GrPorts IMPORT bitmap, rowTblPtr, adsBMap;
  FROM Storage IMPORT ALLOCATE, DEALLOCATE, Available;

  VAR
    GrafixCard,
    CommPort,
    i:          INTEGER;
    myBitmap:   GrPorts.bitmap;
    addrBMap:   GrPorts.adsBMap;
    rowTbl:     rowTblPtr;
    GotKey:     BOOLEAN;

BEGIN
  (* init the system *)

  GrQry.GrInit(GrafixCard, CommPort);

  i := Meta.InitGrafix(-GrafixCard);

  IF (i # 0) THEN
    (* Display reason for no go *)
    GrQry.GrInitErr(GrafixCard, CommPort, i);
  END;


  myBitmap.devClass    :=  24;  (* Initialize bitmap data fields *)
  myBitmap.devType     :=   0;
  myBitmap.rowBytes    :=  90;     (*= 720/8*)
  myBitmap.pixWidth    := 720;
  myBitmap.pixHeight   := 348;
  myBitmap.pixResX     :=  90;
  myBitmap.pixResY     :=  64;
  myBitmap.pixBits     :=   1;
  myBitmap.pixPlanes   :=   1;

  IF NOT(Available(384*4)) THEN
    GrQry.GrQuit('Insufficient memory.', 1)
  END;

  ALLOCATE(ADDRESS(rowTbl), 384*4);

  myBitmap.mapTable[0] :=  rowTbl;
  rowTbl^.rowTable[0]  :=  ADDRESS(0B0000000H); (* Initialize 1st entry *)

  addrBMap := ADR(myBitmap);
  Meta.InitRowTable(addrBMap, 4, 0000, 2000H);
  Meta.PortBitmap(addrBMap);   (* Assign bitmap to the current port *)
  Meta.CursorBitmap(addrBMap); (* Track the cursor on this bitmap.  *)

  REPEAT
    GotKey := IO.KeyPressed();
  UNTIL GotKey;

  GrQry.GrQuit('', 0);
END Sample06.