--Griffin encoding types--m.stone November 2, 1979  6:26 PM-- Last Edited by: Stone, February 17, 1983 10:33 amDIRECTORY	PointDefs: FROM "PointDefs",	Graphics USING [Context];EncodingDefs: DEFINITIONS   =BEGINChainHandle: TYPE = REF ChainEncoding;AreaHandle: TYPE = REF AreaEncoding;BYTE: TYPE = [0..256);ChainEncoding: TYPE = RECORD	[link: ChainHandle _ NIL,	linknumber: [0..255] _ 0,	tl,br: PointDefs.ScrPt _ [0,0],	--bounding box	p0: PointDefs.ScrPt _ [0,0],		--starting point	octants: LONG DESCRIPTOR FOR PACKED ARRAY OF BYTE,	bits: ARRAY [0..3] OF CARDINAL _ ALL[0]];LongRun: TYPE = RECORD [lx,dx: INTEGER _ 0];ShortRun: TYPE = RECORD [lx,dx: BYTE _ 0];RunType: TYPE={short,long};AreaEncoding: TYPE = RECORD	[link: AreaHandle _ NIL,	tl,br: PointDefs.ScrPt _ [0,0],		--bounding box. tl is origin	codes: SELECT rep: RunType FROM		short => [runs: LONG DESCRIPTOR FOR ARRAY OF ShortRun],		long => [runs: LONG DESCRIPTOR FOR ARRAY OF LongRun],		ENDCASE	];--implemented by encodingAddChainPoint: PROCEDURE[PointDefs.ScrPt];AddChainLine: PUBLIC PROCEDURE[PointDefs.ScrPt];MakeChainEncoding: PROCEDURE RETURNS[ChainHandle];PlotChainChunk:  PROCEDURE [encoding: ChainHandle, dc: Graphics.Context];TestChainChunk:  PROCEDURE [encoding: ChainHandle,	NextPoint: PROCEDURE[PointDefs.ScrPt] RETURNS[stop: BOOLEAN]];DeleteChainEncoding: PROCEDURE[ChainHandle];CopyChainEncoding: PUBLIC PROCEDURE[chain: ChainHandle] RETURNS[newchain: ChainHandle];MakeAreaEncoding: PROCEDURE[ChainHandle] RETURNS[AreaHandle];PlotAreaChunk: PROCEDURE[encoding: AreaHandle, dc: Graphics.Context];TestAreaChunk: PROCEDURE[encoding: AreaHandle,	TestLine: PROCEDURE[y,lx,dx: INTEGER] RETURNS[stop: BOOLEAN] ];DeleteAreaEncoding: PROCEDURE[AreaHandle];CopyAreaEncoding: PROCEDURE[oldarea: AreaHandle] RETURNS[newarea: AreaHandle];END.      Э╩Х  Ш JЪ╣Ь╧crЬ╧k	ЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬЮЬ>ЭЬЭЬ
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