165 lines
6.3 KiB
Plaintext
Executable File
165 lines
6.3 KiB
Plaintext
Executable File
.INCLUDE GRAFTYPES.TEXT
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;-----------------------------------------------------------
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;
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;
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; * ***** *** ***
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; * * * * * * * *
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; * * * * * *
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; * * ***** * ***
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; ***** * * * *
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; * * * * * * * *
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; * * * * *** ***
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;
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; Procedures for drawing Arcs:
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;
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.PROC StdArc,4
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.REF CheckPic,PutPicVerb,PutPicWord,PutPicRect
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.REF PushVerb,DrawArc
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;---------------------------------------------------------------
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;
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; PROCEDURE StdArc(verb: GrafVerb; r: Rect; startAngle,arcAngle: INTEGER);
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;
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; A6 OFFSETS OF PARAMS AFTER LINK:
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;
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PARAMSIZE .EQU 10
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VERB .EQU PARAMSIZE+8-2 ;GRAFVERB
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RECT .EQU VERB-4 ;LONG, ADDR OF RECT
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STARTANG .EQU RECT-2 ;WORD
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ARCANG .EQU STARTANG-2 ;WORD
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OVWD .EQU -2 ;WORD
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OVHT .EQU OVWD-2 ;WORD
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VARSIZE .EQU OVHT ;TOTAL BYTES OF LOCALS
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LINK A6,#VARSIZE ;ALLOCATE STACK FRAME
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MOVEM.L D4/D7/A3-A4,-(SP) ;SAVE REGS
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MOVE.B VERB(A6),D7 ;GET VERB
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JSR CHECKPIC ;SET UP A4,A3 AND CHECK PICSAVE
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BLE.S NOTPIC ;BRANCH IF NOT PICSAVE
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MOVE.B D7,-(SP)
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JSR PutPicVerb ;PUT ADDIONAL PARAMS TO THEPIC
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MOVEQ #$60,D0 ;PUT ARCNOUN IN HI NIBBLE
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ADD D7,D0 ;PUT VERB IN LO NIBBLE
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MOVE.B D0,-(SP) ;PUSH OPCODE
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MOVE.L RECT(A6),-(SP) ;PUSH ADDR OF RECT
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JSR PutPicRect ;PUT OPCODE AND RECTANGLE
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MOVE STARTANG(A6),-(SP)
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JSR PutPicWord ;PUT STARTANGLE
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MOVE ARCANG(A6),-(SP)
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JSR PutPicWord ;PUT ARCANGLE
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NOTPIC MOVE.L RECT(A6),A0 ;POINT TO RECT
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MOVE RIGHT(A0),D0
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SUB LEFT(A0),D0
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MOVE D0,OVWD(A6) ;OVWD := R.RIGHT - R.LEFT
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MOVE BOTTOM(A0),D0
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SUB TOP(A0),D0
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MOVE D0,OVHT(A6) ;OVHT := R.BOTTOM - R.TOP
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MOVE.L A0,-(SP) ;PUSH ADDR OF RECT
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CLR.B -(SP) ;PUSH HOLLOW = FALSE
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TST.B D7 ;IS VERB FRAME ?
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BNE.S DOIT ;NO, CONTINUE
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;
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; Currently, FrameArc does not put inversion points to theRgn.
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; If this changes, add test and call to PutArc here.
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;
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MOVE.B #1,(SP) ;REPLACE, PUSH HOLLOW = TRUE
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DOIT MOVE.L OVHT(A6),-(SP) ;PUSH OVWD,OVHT
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JSR PushVerb ;PUSH MODE AND PATTERN
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MOVE STARTANG(A6),-(SP) ;PUSH STARTANGLE
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MOVE ARCANG(A6),-(SP) ;PUSH ARCANGLE
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; DrawArc(r,hollow,ovWd,ovHt,mode,pat,startAng,arcAng);
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JSR DrawArc
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MOVEM.L (SP)+,D4/D7/A3-A4 ;RESTORE REGS
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UNLINK PARAMSIZE,'STDARC '
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.PROC FrameArc,3
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.DEF CallArc,PaintArc,EraseArc,InvertArc,FillArc
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.REF STDARC
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;-----------------------------------------------------
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;
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; PROCEDURE FrameArc(* r: Rect; startAngle,arcAngle: INTEGER *);
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;
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MOVEQ #FRAME,D0 ;VERB = FRAME
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BRA.S CallArc ;SHARE COMMON CODE
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;-----------------------------------------------------
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;
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; PROCEDURE PaintArc(* r: Rect; startAngle,arcAngle: INTEGER *);
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;
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PaintArc
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MOVEQ #PAINT,D0 ;VERB = PAINT
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BRA.S CallArc ;SHARE COMMON CODE
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;--------------------------------------------------------
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;
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; PROCEDURE EraseArc(* r: Rect; startAngle,arcAngle: INTEGER *);
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;
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EraseArc
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MOVEQ #ERASE,D0 ;VERB = ERASE
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BRA.S CallArc ;SHARE COMMON CODE
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;--------------------------------------------------------
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;
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; PROCEDURE InvertArc(* r: Rect; startAngle,arcAngle: INTEGER *);
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;
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InvertArc
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MOVEQ #INVERT,D0 ;VERB = INVERT
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BRA.S CallArc ;SHARE COMMON CODE
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;--------------------------------------------------------
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;
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; PROCEDURE FillArc(* r: Rect; startAngle,arcAngle: INTEGER; pat: Pattern *);
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;
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FillArc MOVE.L (SP)+,A0 ;POP RETURN ADDR
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MOVE.L (SP)+,A1 ;POP ADDR OF PATTERN
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MOVE.L A0,-(SP) ;PUT RETURN ADDR BACK
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MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO LISAGRAF GLOBALS
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MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT
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LEA FILLPAT(A0),A0 ;POINT TO FILLPAT
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MOVE.L (A1)+,(A0)+ ;COPY PAT INTO FILLPAT
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MOVE.L (A1)+,(A0)+ ;ALL EIGHT BYTES
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MOVEQ #FILL,D0 ;VERB = FILL
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BRA.S CallArc ;SHARE COMMON CODE
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;---------------------------------------------------------------
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;
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; PROCEDURE CallArc(r: Rect; startAngle,arcAngle: INTEGER);
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;
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; code shared by FrameArc, PaintArc, EraseArc, InvertArc, and FillArc.
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; enter with verb in D0.
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;
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CallArc MOVE.L (SP)+,A0 ;POP RETURN ADDR
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MOVE.L (SP)+,D1 ;POP BOTH ANGLES
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MOVE.L (SP)+,A1 ;POP ADDR OF RECT
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MOVE.B D0,-(SP) ;PUSH VERB
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MOVE.L A1,-(SP) ;PUSH ADDR OF RECT
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MOVE.L D1,-(SP) ;PUSH BOTH ANGLES
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MOVE.L A0,-(SP) ;PUSH RETURN ADDR
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MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO LISAGRAF GLOBALS
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MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT
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MOVE.L GRAFPROCS(A0),D0 ;IS GRAFPROCS NIL ?
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LEA STDARC,A0
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BEQ.S USESTD ;YES, USE STD PROC
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MOVE.L D0,A0
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MOVE.L ARCPROC(A0),A0 ;NO, GET PROC PTR
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USESTD JMP (A0) ;GO TO IT
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.END
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