mirror of
https://github.com/jrk/QuickDraw.git
synced 2024-10-31 10:17:24 +00:00
165 lines
6.3 KiB
Plaintext
165 lines
6.3 KiB
Plaintext
|
.INCLUDE GRAFTYPES.TEXT
|
||
|
|
;-----------------------------------------------------------
|
||
|
|
;
|
||
|
|
;
|
||
|
|
; * ***** *** ***
|
||
|
|
; * * * * * * * *
|
||
|
|
; * * * * * *
|
||
|
|
; * * ***** * ***
|
||
|
|
; ***** * * * *
|
||
|
|
; * * * * * * * *
|
||
|
|
; * * * * *** ***
|
||
|
|
;
|
||
|
|
; Procedures for drawing Arcs:
|
||
|
|
;
|
||
|
|
|
||
|
|
|
||
|
|
.PROC StdArc,4
|
||
|
|
.REF CheckPic,PutPicVerb,PutPicWord,PutPicRect
|
||
|
|
.REF PushVerb,DrawArc
|
||
|
|
;---------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE StdArc(verb: GrafVerb; r: Rect; startAngle,arcAngle: INTEGER);
|
||
|
|
;
|
||
|
|
; A6 OFFSETS OF PARAMS AFTER LINK:
|
||
|
|
;
|
||
|
|
PARAMSIZE .EQU 10
|
||
|
|
VERB .EQU PARAMSIZE+8-2 ;GRAFVERB
|
||
|
|
RECT .EQU VERB-4 ;LONG, ADDR OF RECT
|
||
|
|
STARTANG .EQU RECT-2 ;WORD
|
||
|
|
ARCANG .EQU STARTANG-2 ;WORD
|
||
|
|
|
||
|
|
OVWD .EQU -2 ;WORD
|
||
|
|
OVHT .EQU OVWD-2 ;WORD
|
||
|
|
VARSIZE .EQU OVHT ;TOTAL BYTES OF LOCALS
|
||
|
|
|
||
|
|
|
||
|
|
LINK A6,#VARSIZE ;ALLOCATE STACK FRAME
|
||
|
|
MOVEM.L D4/D7/A3-A4,-(SP) ;SAVE REGS
|
||
|
|
MOVE.B VERB(A6),D7 ;GET VERB
|
||
|
|
JSR CHECKPIC ;SET UP A4,A3 AND CHECK PICSAVE
|
||
|
|
BLE.S NOTPIC ;BRANCH IF NOT PICSAVE
|
||
|
|
|
||
|
|
MOVE.B D7,-(SP)
|
||
|
|
JSR PutPicVerb ;PUT ADDIONAL PARAMS TO THEPIC
|
||
|
|
MOVEQ #$60,D0 ;PUT ARCNOUN IN HI NIBBLE
|
||
|
|
ADD D7,D0 ;PUT VERB IN LO NIBBLE
|
||
|
|
MOVE.B D0,-(SP) ;PUSH OPCODE
|
||
|
|
MOVE.L RECT(A6),-(SP) ;PUSH ADDR OF RECT
|
||
|
|
JSR PutPicRect ;PUT OPCODE AND RECTANGLE
|
||
|
|
MOVE STARTANG(A6),-(SP)
|
||
|
|
JSR PutPicWord ;PUT STARTANGLE
|
||
|
|
MOVE ARCANG(A6),-(SP)
|
||
|
|
JSR PutPicWord ;PUT ARCANGLE
|
||
|
|
|
||
|
|
NOTPIC MOVE.L RECT(A6),A0 ;POINT TO RECT
|
||
|
|
MOVE RIGHT(A0),D0
|
||
|
|
SUB LEFT(A0),D0
|
||
|
|
MOVE D0,OVWD(A6) ;OVWD := R.RIGHT - R.LEFT
|
||
|
|
MOVE BOTTOM(A0),D0
|
||
|
|
SUB TOP(A0),D0
|
||
|
|
MOVE D0,OVHT(A6) ;OVHT := R.BOTTOM - R.TOP
|
||
|
|
|
||
|
|
MOVE.L A0,-(SP) ;PUSH ADDR OF RECT
|
||
|
|
CLR.B -(SP) ;PUSH HOLLOW = FALSE
|
||
|
|
TST.B D7 ;IS VERB FRAME ?
|
||
|
|
BNE.S DOIT ;NO, CONTINUE
|
||
|
|
;
|
||
|
|
; Currently, FrameArc does not put inversion points to theRgn.
|
||
|
|
; If this changes, add test and call to PutArc here.
|
||
|
|
;
|
||
|
|
MOVE.B #1,(SP) ;REPLACE, PUSH HOLLOW = TRUE
|
||
|
|
DOIT MOVE.L OVHT(A6),-(SP) ;PUSH OVWD,OVHT
|
||
|
|
JSR PushVerb ;PUSH MODE AND PATTERN
|
||
|
|
MOVE STARTANG(A6),-(SP) ;PUSH STARTANGLE
|
||
|
|
MOVE ARCANG(A6),-(SP) ;PUSH ARCANGLE
|
||
|
|
|
||
|
|
; DrawArc(r,hollow,ovWd,ovHt,mode,pat,startAng,arcAng);
|
||
|
|
|
||
|
|
JSR DrawArc
|
||
|
|
MOVEM.L (SP)+,D4/D7/A3-A4 ;RESTORE REGS
|
||
|
|
UNLINK PARAMSIZE,'STDARC '
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
.PROC FrameArc,3
|
||
|
|
.DEF CallArc,PaintArc,EraseArc,InvertArc,FillArc
|
||
|
|
.REF STDARC
|
||
|
|
;-----------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE FrameArc(* r: Rect; startAngle,arcAngle: INTEGER *);
|
||
|
|
;
|
||
|
|
MOVEQ #FRAME,D0 ;VERB = FRAME
|
||
|
|
BRA.S CallArc ;SHARE COMMON CODE
|
||
|
|
|
||
|
|
|
||
|
|
;-----------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE PaintArc(* r: Rect; startAngle,arcAngle: INTEGER *);
|
||
|
|
;
|
||
|
|
PaintArc
|
||
|
|
MOVEQ #PAINT,D0 ;VERB = PAINT
|
||
|
|
BRA.S CallArc ;SHARE COMMON CODE
|
||
|
|
|
||
|
|
|
||
|
|
;--------------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE EraseArc(* r: Rect; startAngle,arcAngle: INTEGER *);
|
||
|
|
;
|
||
|
|
EraseArc
|
||
|
|
MOVEQ #ERASE,D0 ;VERB = ERASE
|
||
|
|
BRA.S CallArc ;SHARE COMMON CODE
|
||
|
|
|
||
|
|
|
||
|
|
;--------------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE InvertArc(* r: Rect; startAngle,arcAngle: INTEGER *);
|
||
|
|
;
|
||
|
|
InvertArc
|
||
|
|
MOVEQ #INVERT,D0 ;VERB = INVERT
|
||
|
|
BRA.S CallArc ;SHARE COMMON CODE
|
||
|
|
|
||
|
|
|
||
|
|
;--------------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE FillArc(* r: Rect; startAngle,arcAngle: INTEGER; pat: Pattern *);
|
||
|
|
;
|
||
|
|
FillArc MOVE.L (SP)+,A0 ;POP RETURN ADDR
|
||
|
|
MOVE.L (SP)+,A1 ;POP ADDR OF PATTERN
|
||
|
|
MOVE.L A0,-(SP) ;PUT RETURN ADDR BACK
|
||
|
|
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO LISAGRAF GLOBALS
|
||
|
|
MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT
|
||
|
|
LEA FILLPAT(A0),A0 ;POINT TO FILLPAT
|
||
|
|
MOVE.L (A1)+,(A0)+ ;COPY PAT INTO FILLPAT
|
||
|
|
MOVE.L (A1)+,(A0)+ ;ALL EIGHT BYTES
|
||
|
|
MOVEQ #FILL,D0 ;VERB = FILL
|
||
|
|
BRA.S CallArc ;SHARE COMMON CODE
|
||
|
|
|
||
|
|
|
||
|
|
;---------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; PROCEDURE CallArc(r: Rect; startAngle,arcAngle: INTEGER);
|
||
|
|
;
|
||
|
|
; code shared by FrameArc, PaintArc, EraseArc, InvertArc, and FillArc.
|
||
|
|
; enter with verb in D0.
|
||
|
|
;
|
||
|
|
CallArc MOVE.L (SP)+,A0 ;POP RETURN ADDR
|
||
|
|
MOVE.L (SP)+,D1 ;POP BOTH ANGLES
|
||
|
|
MOVE.L (SP)+,A1 ;POP ADDR OF RECT
|
||
|
|
MOVE.B D0,-(SP) ;PUSH VERB
|
||
|
|
MOVE.L A1,-(SP) ;PUSH ADDR OF RECT
|
||
|
|
MOVE.L D1,-(SP) ;PUSH BOTH ANGLES
|
||
|
|
MOVE.L A0,-(SP) ;PUSH RETURN ADDR
|
||
|
|
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO LISAGRAF GLOBALS
|
||
|
|
MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT
|
||
|
|
MOVE.L GRAFPROCS(A0),D0 ;IS GRAFPROCS NIL ?
|
||
|
|
LEA STDARC,A0
|
||
|
|
BEQ.S USESTD ;YES, USE STD PROC
|
||
|
|
MOVE.L D0,A0
|
||
|
|
MOVE.L ARCPROC(A0),A0 ;NO, GET PROC PTR
|
||
|
|
USESTD JMP (A0) ;GO TO IT
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
.END
|