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sys7.1-doc-wip/QuickDraw/Polygons.a
Horst Beepmanh 33cd9271f4 SuperMarioProj.1994-02-09
2019-07-27 22:37:48 +08:00

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;
; File: Polygons.a
;
; Copyright: © 1981-1992 by Apple Computer, Inc., all rights reserved.
;
; Change History (most recent first):
;
; <SM3> 6/11/92 stb <sm 6/9/92>stb Synch with QDciPatchROM.a; added comments to
; StdPoly, StdDraw.
; <SM2> 5/21/92 kc Change the name of QuickDraws wrapper for NewHandle to
; NewHandleWrapper to avoid name conflict with the glue.
; <•1.4> 5/29/89 BAL Blasting in 32-Bit QuickDraw version 1.0 Final
; <•1.3> 4/12/89 BAL Blasting in 32-Bit QuickDraw 1.0B1
; <EHB> 5/26/87 Put proper opcode to color picture
; <EHB> 9/5/86 Added FillCPoly
; <EHB> 8/16/86 In FillPoly, call SetFillPat for color pattern support.
;
;
BLANKS ON
STRING ASIS
;--------------------------------------------------------------
;
;
; **** *** * * * *** *** * * ***
; * * * * * * * * * * * * * * *
; * * * * * * * * * ** * *
; **** * * * * * ** * * * * * ***
; * * * * * * * * * * ** *
; * * * * * * * * * * * * *
; * *** ***** * *** *** * * ***
;
;
useArt EQU 1 ;use Art Cabral's vector based poly code
StdPoly PROC EXPORT
IMPORT PutPicVerb,DPutPicByte,PutPicRgn
IMPORT PushVerb,FrPoly,RSect,DrawPoly
;---------------------------------------------------------------
;
; PROCEDURE StdPoly(verb: GrafVerb; poly: PolyHandle);
;
; A6 OFFSETS OF PARAMS AND LOCALS AFTER LINK:
;
; has fixes from QDciPatchROM.a <sm 6/9/92>stb
PARAMSIZE EQU 6
VERB EQU PARAMSIZE+8-2 ;GRAFVERB
POLY EQU VERB-4 ;LONG, PolyHandle
MINRECT EQU -8 ;RECT
VARSIZE EQU MINRECT ;TOTAL BYTES OF LOCALS
LINK A6,#VARSIZE ;ALLOCATE STACK FRAME
MOVEM.L D5-D7/A2-A4,-(SP) ;SAVE REGS
MOVEQ #0,D7 ;CLEAR LO WORD OF REG SO OPCODE WILL BE OK TO 16BITS <C952/08Nov87> DAF
MOVE.B VERB(A6),D7 ;GET VERB
_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 #$70,D0 ;PUT POLYNOUN IN HI NIBBLE
ADD D7,D0 ;PUT VERB IN LO NIBBLE
JSR DPutPicOp ;PUT OPCODE TO THEPIC <26May87 EHB>
MOVE.L POLY(A6),-(SP) ;PUSH POLYHANDLE
JSR PutPicRgn ;TREAT SAME AS A REGION
; CALL STANDARD LOOP TO DRAW TO ALL DEVICES
NOTPIC PEA StdDraw ;PUSH ADDRESS OF DRAW ROUTINE
PEA GetRect ;PUSH ADDRESS OF RECT ROUTINE
_StdDevLoop ;DRAW TO ALL DEVICES
GOHOME MOVEM.L (SP)+,D5-D7/A2-A4 ;RESTORE REGS
UNLINK PARAMSIZE,'STDPOLY '
;---------------------------------------------------------------
;
; PROCEDURE GetRect(VAR theRect: rect);
;
; RETURN THE OBJECT'S RECTANGLE
;
GetRect MOVE.L (SP)+,D0 ;GET RETURN ADDRESS
MOVE.L (SP)+,A1 ;GET DST RECT
MOVE.L D0,-(SP) ;REPLACE RETURN ADDRESS
MOVE.L POLY(A6),A0 ;GET POLYGON
MOVE.L (A0),A0 ;POINT AT IT
LEA POLYBBOX(A0),A0 ;POINT TO BOUNDING BOX
MOVE.L (A0)+,(A1)+ ;SET TOPLEFT
MOVE.L (A0),(A1) ;SET BOTRIGHT
; GROW THE RECT BECAUSE A POLY DRAWS OUTSIDE OF ITS BOUNDING BOX
PEA -4(A1) ;POINT TO THERECT
MOVE.L PNSIZE(A3),D0 ;GET PENSIZE.H
NEG D0 ;NEGATE WIDTH
MOVE D0,-(SP) ;PUSH DH
SWAP D0 ;GET PENSIZE.V
NEG D0 ;NEGATE HEIGHT
MOVE D0,-(SP) ;PUSH DV
_INSETRECT
RTS ;AND RETURN
;---------------------------------------------------------------
;
; PROCEDURE StdDraw;
;
; DRAW THE OBJECT
;
; from QDciPatchROM.a <sm 6/9/92>stb
StdDraw MOVE.L POLY(A6),A2 ;GET POLYHANDLE
TST.B D7 ;IS VERB FRAME ?
BNE.S NOTFR ;NO, CONTINUE
MOVE.L A2,-(SP) ;PUSH POLYHANDLE
JSR FrPoly ;FrPoly(poly);
BRA.S DONE ;AND QUIT
NOTFR MOVE.L (A2),A0 ;DE-REFERANCE POLYHANDLE
PEA POLYBBOX(A0) ;PUSH POLYBBOX
MOVE.L VISRGN(A3),A0 ;GET VISRGN HANDLE
MOVE.L (A0),A0 ;DE-REFERENCE HANDLE
PEA RGNBBOX(A0) ;PUSH VISRGN BBOX
MOVE.L CLIPRGN(A3),A0 ;GET CLIPRGN HANDLE
MOVE.L (A0),A0 ;DE-REFERENCE HANDLE
PEA RGNBBOX(A0) ;PUSH CLIPRGN BBOX
MOVE #3,-(SP) ;PUSH NRECTS = 3
PEA MINRECT(A6) ;PUT RESULT IN MINRECT
_RSECT ;CALC INTERSECTION
BEQ.S DONE ;QUIT IF NO INTERSECT
MOVE.L A2,-(SP) ;PUSH POLYHANDLE
_PushVerb ;PUSH MODE AND PATTERN
JSR DrawPoly ;DrawPoly(poly,mode,pat);
DONE RTS
FramePoly PROC EXPORT
EXPORT CallPoly,PaintPoly,ErasePoly,InvertPoly,FillPoly,FillCPoly
IMPORT SETFILLPAT
;-----------------------------------------------------
;
; PROCEDURE FramePoly(* poly: PolyHandle *);
;
MOVEQ #FRAME,D0 ;VERB = FRAME
BRA.S CallPoly ;SHARE COMMON CODE
;-----------------------------------------------------
;
; PROCEDURE PaintPoly(* poly: PolyHandle *);
;
PaintPoly
MOVEQ #PAINT,D0 ;VERB = PAINT
BRA.S CallPoly ;SHARE COMMON CODE
;--------------------------------------------------------
;
; PROCEDURE ErasePoly(* poly: PolyHandle *);
;
ErasePoly
MOVEQ #ERASE,D0 ;VERB = ERASE
BRA.S CallPoly ;SHARE COMMON CODE
;--------------------------------------------------------
;
; PROCEDURE InvertPoly(* poly: PolyHandle *);
;
InvertPoly
MOVEQ #INVERT,D0 ;VERB = INVERT
BRA.S CallPoly ;SHARE COMMON CODE
;--------------------------------------------------------
;
; PROCEDURE FillPoly(* poly: PolyHandle; pat: Pattern *);
;
FillPoly
MOVEQ #0,D0 ;FLAG = FillPoly
BRA.S SHARE ; => USE COMMON CODE
;----------------------------------------------------------
;
; PROCEDURE FillCPoly(poly: PolyHandle; PPH: PixPatHandle);
;
FillCPoly
MOVEQ #1,D0 ;FLAG = FillCPoly
SHARE 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 A1,-(SP) ;PUSH ADDR OF PATTERN
_SETFILLPAT ;FILLPAT := PAT
MOVEQ #FILL,D0 ;VERB = FILL
; BRA.S CallPoly ;SHARE COMMON CODE
;---------------------------------------------------------------
;
; PROCEDURE CallPoly(poly: PolyHandle);
;
; code shared by FramePoly, PaintPoly, ErasePoly, InvertPoly, and FillPoly.
; enter with verb in D0.
;
CallPoly
MOVE.L (SP)+,A0 ;POP RETURN ADDR
MOVE.L (SP)+,A1 ;POP POLY
MOVE.B D0,-(SP) ;PUSH VERB
MOVE.L A1,-(SP) ;PUSH POLY
MOVE.L A0,-(SP) ;RESTORE 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 ?
MOVE.L JStdPoly,A0 ;get piece of trap table
BEQ.S USESTD ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L POLYPROC(A0),A0 ;NO, GET PROC PTR
USESTD JMP (A0) ;GO TO IT
OpenPoly FUNC EXPORT
IMPORT HidePen,NewHandleWrapper
;---------------------------------------------------------------
;
; FUNCTION OpenPoly: PolyHandle;
;
STARTSIZE EQU 138 ;ENOUGH FOR 32 POINTS
_HidePen ;TURN OFF DRAWING
CLR.L -(SP) ;MAKE ROOM FOR FCN RESULT
MOVE #STARTSIZE,-(SP) ;PUSH BYTE COUNT = STARTSIZE
JSR NewHandleWrapper ;ALLOCATE NEWHANDLE
MOVE.L (SP)+,A1 ;POP RESULTING HANDLE
MOVE.L A1,4(SP) ;PUT HANDLE IN FCN RESULT
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS
MOVE.L A1,THEPOLY(A0) ;REMEMBER HANDLE IN THEPOLY
MOVE #STARTSIZE,POLYMAX(A0) ;POLYMAX := STARTSIZE;
MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT
MOVEQ #1,D0
MOVE.L D0,POLYSAVE(A0) ;POLYSAVE := TRUE
MOVE.L (A1),A1 ;DE-REFERENCE HANDLE
MOVE #10,(A1)+ ;INSTALL POLYSIZE = 10
CLR.L (A1)+ ;ZERO OUT POLYBBOX
CLR.L (A1)+
RTS ;RETURN
ClosePoly PROC EXPORT
IMPORT SetHSize,ShowPen
;---------------------------------------------------------------
;
; PROCEDURE ClosePoly;
;
; A6 OFFSETS OF PARAMS AND LOCALS AFTER LINK:
;
MOVEM.L D3-D7/A4,-(SP) ;SAVE REGS
MOVE.L GRAFGLOBALS(A5),A4 ;POINT TO QUICKDRAW GLOBALS
MOVE.L THEPORT(A4),A0 ;GET CURRENT GRAFPORT
CLR.L POLYSAVE(A0) ;POLYSAVE := FALSE
MOVE.L THEPOLY(A4),A4 ;GET THEPOLY HANDLE
MOVE.L (A4),A0 ;DE-REFERENCE THEPOLY
MOVE (A0)+,D7 ;GET POLYSIZE
CLR.L (A0)+ ;ZERO OUT POLYBBOX
CLR.L (A0)+
MOVE D7,D6
SUB #10,D6
LSR #2,D6 ;NPOINTS = (SIZE-10) DIV 4
BEQ.S EMPTY ;QUIT IF NO POINTS
;-----------------------------------------------------
;
; SCAN FOR BOUNDING BOX OF POLYGON
;
MOVE (A0)+,D1 ;TOP := FIRST POINT VERT
MOVE D1,D2 ;BOTTOM := FIRST POINT VERT
MOVE (A0)+,D3 ;LEFT := FIRST POINT HORIZ
MOVE D3,D4 ;RIGHT := FIRST POINT HORIZ
SUB #1,D6 ;DECREMENT POINT COUNT
BRA.S RIGHTOK ;GO TO LOOP START
NEXTPT MOVE (A0)+,D0 ;GET VERT COORD
CMP D1,D0 ;IS VERT < BBOX TOP ?
BGE.S TOPOK ;NO, CONTINUE
MOVE D0,D1 ;YES, UPDATE BBOX TOP
TOPOK CMP D2,D0 ;IS VERT > BBOX BOTTOM ?
BLE.S BOTOK ;NO, CONTINUE
MOVE D0,D2 ;YES, UPDATE BBOX BOTTOM
BOTOK MOVE (A0)+,D0 ;GET HORIZ COORD
CMP D3,D0 ;IS HORIZ < BBOX LEFT ?
BGE.S LEFTOK ;NO, CONTINUE
MOVE D0,D3 ;YES, UPDATE BBOX LEFT
LEFTOK CMP D4,D0 ;IS HORIZ > BBOX RIGHT ?
BLE.S RIGHTOK ;NO, CONTINUE
MOVE D0,D4 ;YES, UPDATE BBOX RIGHT
RIGHTOK DBRA D6,NEXTPT ;LOOP ALL POINTS
MOVE.L (A4),A0 ;DE-REFERENCE THEPOLY
LEA POLYBBOX(A0),A0 ;POINT TO POLYBBOX
MOVE D1,(A0)+ ;INSTALL BBOX TOP
MOVE D3,(A0)+ ;INSTALL BBOX LEFT
MOVE D2,(A0)+ ;INSTALL BBOX BOTTOM
MOVE D4,(A0)+ ;INSTALL BBOX RIGHT
;--------------------------------------------------------
;
; TRIM THEPOLY TO FINAL SIZE, SHOW PEN AND QUIT
;
EMPTY MOVE.L A4,-(SP) ;PUSH THEPOLY HANDLE
MOVE D7,-(SP) ;PUSH BYTECOUNT = POLYSIZE
JSR SetHSize ;TRIM TO MINIMUM SIZE
_SHOWPEN ;RESTORE PNVIS
MOVEM.L (SP)+,D3-D7/A4 ;RESTORE REGS
RTS ;AND RETURN
KillPoly PROC EXPORT
;---------------------------------------------------
;
; PROCEDURE KillPoly(poly: PolyHandle);
;
MOVE.L (SP)+,A1 ;pop return addr
MOVE.L (SP)+,A0 ;pop handle
_DisposHandle ;discard it
JMP (A1) ;and return
OffsetPoly PROC EXPORT
;---------------------------------------------------
;
; PROCEDURE OffsetPoly(poly: PolyHandle; dh,dv: INTEGER);
;
MOVE.L (SP)+,A0 ;POP RETURN ADDRESS
MOVE (SP)+,D0 ;POP DV
MOVE (SP)+,D1 ;POP DH
MOVE.L (SP)+,A1 ;POP POLYHANDLE
MOVE.L (A1),A1 ;DE-REFERENCE POLYHANDLE
MOVE (A1)+,D2 ;GET POLYSIZE
SUB #2,D2 ;CALC TOTAL # POINTS, INCL BBOX
LSR #2,D2 ; # POINTS = (SIZE-2) DIV 4
SUB #1,D2 ;INIT DBRA COUNT
NEXTPT ADD D0,(A1)+ ;OFFSET VERT COORD
ADD D1,(A1)+ ;OFFSET HORIZ COORD
DBRA D2,NEXTPT ;LOOP FOR ALL POINTS
JMP (A0) ;AND RETURN
MapPoly PROC EXPORT
IMPORT MapPt,MapRect
;-------------------------------------------------------------
;
; PROCEDURE MapPoly(poly: PolyHandle; fromRect,toRect: Rect);
;
; A6 OFFSETS OF PARAMETERS AND LOCALS AFTER LINK:
;
PARAMSIZE EQU 12
POLY EQU PARAMSIZE+8-4 ;LONG, RGNHANDLE
FROMRECT EQU POLY-4 ;LONG, ADDR OF RECT
TORECT EQU FROMRECT-4 ;LONG, ADDR OF RECT
LINK A6,#0 ;ALLOCATE STACK FRAME
MOVEM.L D7/A2-A4,-(SP) ;SAVE REGS
;
; QUIT FAST IF FROMRECT = TORECT
;
MOVE.L FROMRECT(A6),A2 ;POINT TO FROMRECT
MOVE.L TORECT(A6),A3 ;POINT TO TORECT
MOVE.L (A2),D0
CMP.L (A3),D0 ;IS TOPLEFT SAME ?
BNE.S NOTSAME ;NO, CONTINUE
MOVE.L 4(A2),D0
CMP.L 4(A3),D0 ;YES, IS BOTRIGHT SAME TOO ?
BEQ.S DONE ;IF SO, JUST QUIT
NOTSAME MOVE.L POLY(A6),A4 ;GET POLYHANDLE
MOVE.L (A4),A4 ;DE-REFERENCE POLYHANDLE
PEA POLYBBOX(A4) ;PUSH ADDR OF BBOX
MOVE.L A2,-(SP) ;PUSH FROMRECT
MOVE.L A3,-(SP) ;PUSH TORECT
_MAPRECT ;MAP POLYBBOX
MOVEQ #10,D0
MOVE POLYSIZE(A4),D7 ;GET POLYSIZE
SUB D0,D7
LSR #2,D7 ;NPOINTS = (POLYSIZE-10) DIV 4
ADD D0,A4 ;POINT TO FIRST POINT
BRA.S START ;GO TO LOOP START
NEXTPT MOVE.L A4,-(SP) ;PUSH ADDR OF POINT
MOVE.L A2,-(SP) ;PUSH FROMRECT
MOVE.L A3,-(SP) ;PUSH TORECT
_MAPPT ;MAP THIS POINT
ADD #4,A4 ;BUMP TO NEXT POINT
START DBRA D7,NEXTPT ;LOOP ALL POINTS IN POLY
DONE MOVEM.L (SP)+,D7/A2-A4 ;RESTORE REGS
UNLINK PARAMSIZE,'MAPPOLY '
FrPoly PROC EXPORT
IMPORT MoveTo
;--------------------------------------------------------
;
; PROCEDURE FrPoly(poly: PolyHandle);
;
; A6 OFFSETS OF PARAMS AND LOCALS AFTER LINK:
;
PARAMSIZE EQU 4
POLY EQU PARAMSIZE+8-4 ;LONG, POLYHANDLE
LINK A6,#0 ;ALLOCATE STACK FRAME
MOVEM.L D6-D7/A4,-(SP) ;SAVE REGS
MOVE.L POLY(A6),A4 ;GET POLYHANDLE
MOVE.L (A4),A0 ;DE-REFERENCE IT
MOVE (A0),D7 ;GET POLYSIZE
SUB #10,D7
LSR #2,D7 ;NPOINTS = (SIZE-10) DIV 4
BEQ.S DONE ;QUIT IF EMPTY POLYGON
MOVE.L 10(A0),-(SP) ;PUSH FIRST POINT
_MOVETO ;MOVETO(FIRST POINT)
MOVE.L #14,D6 ;INIT BYTE OFFSET
SUB #1,D7 ;DECREMENT COUNT
BRA.S START ;GOT TO LOOP START
NEXTPT MOVE.B HiliteMode,-(SP) ;preserve hilite state for each side
MOVE.L (A4),A0 ;DE-REFERENCE POLYHANDLE
MOVE.L 0(A0,D6),-(SP) ;PUSH NEXT POINT
ADD #4,D6 ;BUMP BYTE OFFSET
_DoLine ;DOLINE(PT)
MOVE.B (SP)+,HiliteMode ;restore hilite state for each side
START DBRA D7,NEXTPT ;LOOP FOR ALL POINTS
DONE MOVEM.L (SP)+,D6-D7/A4 ;RESTORE REGS
BSET #hiliteBit,HiliteMode ;reset hilite flag
UNLINK PARAMSIZE,'FRPOLY '
IF useArt THEN
INCLUDE 'QuickPolys.a'
ELSE
DrawPoly PROC EXPORT
IMPORT OpenRgn,FrPoly,NewRgn,CloseRgn,DrawRgn
;--------------------------------------------------------
;
; PROCEDURE DrawPoly(poly: PolyHandle; mode: INTEGER; VAR pat: Pattern);
;
; A6 OFFSETS OF PARAMS AND LOCALS AFTER LINK:
;
PARAMSIZE EQU 10
POLY EQU PARAMSIZE+8-4 ;LONG, POLYHANDLE
MODE EQU POLY-2 ;WORD
PAT EQU MODE-4 ;LONG, ADDR OF PATTERN
LINK A6,#0 ;NO LOCAL VARS
MOVE.L A4,-(SP) ;SAVE REG
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS
MOVE.L THEPORT(A0),A0 ;GET CURRENT PORT
TST PNVIS(A0) ;IS PNVIS NEG ?
BMI.S DONE ;YES, QUIT
MOVE.B HiliteMode,-(SP) ;save hilite state across call to FrPoly
_OPENRGN ;OpenRgn
MOVE.L POLY(A6),-(SP)
JSR FRPOLY ;FrPoly(poly);
MOVE.L POLY(A6),A0
MOVE.L (A0),A0
MOVE.L 10(A0),-(SP) ;PUSH FIRST POINT
_DoLine ;MAKE SURE IT CLOSES
CLR.L -(SP) ;ROOM FOR FCN RESULT
_NEWRGN ;ALLOCATE TEMPRGN
MOVE.L (SP),A4 ;PUT TEMPRGN IN A4
_CLOSERGN ;CLOSERGN(TEMPRGN)
MOVE.B (SP)+,HiliteMode ;restore hilite state for DrawRgn
MOVE.L A4,-(SP)
MOVE MODE(A6),-(SP)
MOVE.L PAT(A6),-(SP)
JSR DRAWRGN ;DrawRgn(tempRgn,mode,pat);
MOVE.L A4,A0 ;get tempRgn
_DisposHandle ;DISCARD IT
DONE MOVEM.L (SP)+,A4 ;RESTORE REG
UNLINK PARAMSIZE,'DRAWPOLY'
ENDIF
ENDPROC
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