.INCLUDE GRAFTYPES.TEXT ;----------------------------------------------------------------- ; ; ; * *** * * ***** *** ; * * * * * * * ; * * ** * * * ; * * * * * *** *** ; * * * ** * * ; * * * * * * * ; ***** *** * * ***** *** ; ; ; ; Line Drawing Rountines ; .PROC StdLine,1 .REF CheckPic,PutPicVerb,PutPicByte,PutPicLong,DoLine ;--------------------------------------------------------------- ; ; PROCEDURE StdLine(newPt: Point); ; PARAMSIZE .EQU 4 NEWPT .EQU PARAMSIZE+8-4 LINK A6,#0 ;NO LOCAL VARS MOVEM.L D5-D7/A3-A4,-(SP) ;SAVE REGS JSR CHECKPIC ;SET UP A4,A3 AND CHECK PICSAVE BLE.S NOTPIC ;BRANCH IF NOT PICSAVE MOVE.B #FRAME,-(SP) ;PUSH VERB JSR PutPicVerb ;CHECK pnSize, pnMode, pnPat ;-------------------------------------------------------- ; ; PUT ONE OF FOUR LINE OPCODES BASED ON NEWPT AND DH,DV. ; ; line 20, pnLoc(pt), newPt(pt) ; line from 21, newPt(pt) ; short line 22, pnLoc(pt), dh,dv(-128..127) ; short line from 23, dh,dv(-128..127) ; MOVEQ #$20,D7 ;INIT OPCODE TO $20 MOVE.L PICSAVE(A3),A4 ;GET PICSAVE HANDLE MOVE.L (A4),A4 ;DE-REFERENCE PICSAVE MOVE.L PNLOC(A3),D0 ;GET CURRENT PNLOC CMP.L PICPNLOC(A4),D0 ;IS LINE FROM LAST ENDPOINT ? BNE.S NOTFROM ;NO, CONTINUE ADDQ #1,D7 ;YES, SET BIT ZERO NOTFROM MOVE NEWPT+H(A6),D6 ;GET NEWPT.H SUB D0,D6 ;CALC DH = NEWPT.H - PNLOC.H MOVE D6,D0 ;COPY DH EXT.W D0 CMP.W D6,D0 ;IS DH -128..127 ? BNE.S PUTOP ;NO, CONTINUE MOVE NEWPT+V(A6),D5 ;GET NEWPT.V SUB PNLOC+V(A3),D5 ;CALC DV = NEWPT.V - PNLOC.V MOVE D5,D0 ;COPY DV EXT.W D0 CMP.W D5,D0 ;IS DV -128..127 ? BNE.S PUTOP ;NO, CONTINUE ADDQ #2,D7 ;YES, SET BIT ONE IN OPCODE PUTOP MOVE.B D7,-(SP) JSR PutPicByte ;PUT ONE OF 4 LINE OPCODES ROR #1,D7 ;DO WE NEED STARTPT ? (BIT 0) BCS.S STARTOK ;NO, CONTINUE MOVE.L PNLOC(A3),-(SP) JSR PutPicLong ;YES, PUT STARTPT = PNLOC STARTOK ROR #1,D7 ;IS LINE SHORT ? (BIT 1) BCS.S DHDV ;YES, PUT DH,DV MOVE.L NEWPT(A6),-(SP) ;NO, PUT LONG NEWPT JSR PutPicLong ;PUT NEWPT TO THEPIC BRA.S UPDATE DHDV MOVE.B D6,-(SP) ;PUSH DH (-128..127) JSR PutPicByte ;PUT TO THEPIC MOVE.B D5,-(SP) ;PUSH DV (-128..127) JSR PutPicByte ;PUT TO THEPIC UPDATE MOVE.L PICSAVE(A3),A4 ;GET PICSAVE HANDLE MOVE.L (A4),A4 ;DE-REFERENCE PICSAVE MOVE.L NEWPT(A6),PICPNLOC(A4) ;UPDATE PICTURE SAVING STATE NOTPIC MOVE.L NEWPT(A6),-(SP) ;PUSH NEWPT JSR DoLine ;DoLine(newPt); MOVEM.L (SP)+,D5-D7/A3-A4 ;RESTORE REGS UNLINK PARAMSIZE,'STDLINE ' .PROC LineTo,2 .REF StdLine ;---------------------------------------------------------- ; ; PROCEDURE LineTo(h,v: INTEGER); ; MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT MOVE.L GRAFPROCS(A0),D0 ;IS GRAFPROCS NIL ? LEA STDLINE,A0 BEQ.S USESTD ;YES, USE STD PROC MOVE.L D0,A0 MOVE.L LINEPROC(A0),A0 ;NO, GET PROC PTR USESTD JMP (A0) ;GO TO IT .PROC Line,2 .REF LineTo ;---------------------------------------------------------- ; ; PROCEDURE Line(dh,dv: INTEGER); ; MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT MOVE PNLOC+H(A0),D0 ;GET CURRENT PENLOC.H ADD D0,6(SP) ;ADD TO DH MOVE PNLOC+V(A0),D0 ;GET CURRENT PENLOC.V ADD D0,4(SP) ;ADD TO DV JMP LineTo ;LineTo(pnLoc.h+dh,pnLoc.v+dv); .PROC MoveTo,2 ;---------------------------------------------------------- ; ; PROCEDURE MoveTo(h,v: INTEGER); ; MOVE.L (SP)+,A0 ;POP RETURN ADDR MOVE.L GRAFGLOBALS(A5),A1 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A1),A1 ;POINT TO CURRENT GRAFPORT MOVE.L (SP)+,PNLOC(A1) ;COPY POINT INTO PNLOC JMP (A0) ;RETURN .PROC MQVE,2 .DEF Moov ;---------------------------------------------------------- ; ; PROCEDURE Move(dh,dv: INTEGER); ; MOOV MOVE.L (SP)+,A0 ;POP RETURN ADDR MOVE (SP)+,D0 ;POP DV MOVE (SP)+,D1 ;POP DH MOVE.L GRAFGLOBALS(A5),A1 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A1),A1 ;GET CURRENT GRAFPORT ADD D0,PNLOC+V(A1) ;ADD DV TO PNLOC.V ADD D1,PNLOC+H(A1) ;ADD DH TO PNLOC.H JMP (A0) ;RETURN .PROC DoLine,1 .REF DrawLine,PutLine,SetSize ;---------------------------------------------------------- ; ; PROCEDURE DoLine(newPt: Point); ; ; { called by StdLine and StdPoly frame } ; MOVEM.L D6-D7/A3-A4,-(SP) ;SAVE REGS MOVE.L GRAFGLOBALS(A5),A4 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A4),A3 ;POINT TO CURRENT GRAFPORT MOVE.L 20(SP),D7 ;GET NEWPT MOVE.L PNLOC(A3),D6 ;OLDPT := THEPORT^.PNLOC ; ; CHECK IF WE ARE SAVING FOR A POLYGON ; TST.L POLYSAVE(A3) ;ARE WE SAVING FOR A POLYGON ? BEQ.S NOTPOLY ;NO, CONTINUE MOVE.L THEPOLY(A4),A1 ;YES, GET POLYHANDLE MOVE.L (A1),A0 ;DE-REFERENCE IT MOVE (A0),D0 ;GET CURRENT POLYSIZE CMP #10,D0 ;IS THIS THE FIRST POINT ? BNE.S FIRSTOK ;NO, CONTINUE MOVE.L D6,0(A0,D0) ;YES, INSTALL FIRST := OLDPT ADD #4,D0 ;BUMP INDEX FIRSTOK MOVE.L D7,0(A0,D0) ;INSTALL NEWPT AT END ADD #4,D0 ;BUMP INDEX MOVE D0,(A0) ;UPDATE INDEX CMP POLYMAX(A4),D0 ;TIME TO MAKE BIGGER ? BLT.S SIZEOK ;NO, CONTINUE ADD #256,POLYMAX(A4) ;YES, GROW IN CHUNKS MOVE.L A1,-(SP) ;PUSH POLYHANDLE MOVE POLYMAX(A4),-(SP) ;PUSH NEW SIZE JSR SETSIZE ;MAKE THEPOLY BIGGER SIZEOK BRA.S NOTRGN ;DONT SAVE FOR RGN TOO ; ; IF NOT POLY, THEN CHECK FOR RGNSAVE. ; IF RGNSAVE THEN PutLine(oldPt,newPt,rgnBuf,rgnIndex,rgnMax); ; NOTPOLY TST.L RGNSAVE(A3) ;ARE WE SAVING FOR A REGION ? BEQ.S NOTRGN MOVE.L D6,-(SP) ;PUSH OLDPT MOVE.L D7,-(SP) ;PUSH NEWPT MOVE.L RGNBUF(A4),-(SP) ;PUSH RGNBUF PEA RGNINDEX(A4) ;PUSH VAR RGNINDEX PEA RGNMAX(A4) ;PUSH VAR RGNMAX JSR PUTLINE ;ADD INVERSION PTS TO RGNBUF NOTRGN MOVE.L D6,-(SP) ;PUSH OLDPT MOVE.L D7,-(SP) ;PUSH NEWPT JSR DRAWLINE ;DRAW THE LINE MOVE.L D7,PNLOC(A3) ;UPDATE THEPORT^.PNLOC MOVEM.L (SP)+,D6-D7/A3-A4 ;RESTORE REGS MOVE.L (SP)+,(SP) ;STRIP PARAM RTS ;AND RETURN .PROC HidePen,0 .DEF ShowPen ;---------------------------------------------------------- ; ; PROCEDURE HidePen; ; MOVEQ #-1,D0 BRA.S SHARE ;---------------------------------------------------------- ; ; PROCEDURE ShowPen; ; ShowPen MOVEQ #1,D0 SHARE MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT PORT ADD D0,PNVIS(A0) ;INCREMENT/DECREMENT PNVIS RTS ;AND RETURN .PROC GetPenState,1 .DEF SetPenState ;---------------------------------------------------------- ; ; PROCEDURE GetPenState(VAR pnState: PenState); ; PROCEDURE SetPenState(pnState: PenState); ; MOVEQ #1,D0 ;SET A FLAG BRA.S SHARE ;AND SHARE CODE SetPenState CLR D0 ;CLEAR FLAG AND SHARE SHARE MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT LEA PNLOC(A0),A0 ;POINT TO PNLOC MOVE.L 4(SP),A1 ;POINT TO VAR PNSTATE TST D0 ;is this SET penstate ? BNE.S NOTSET ;NO, CONTINUE EXG A0,A1 ;YES, SWAP SRC AND DST NOTSET MOVE.L (A0)+,(A1)+ ;COPY PNLOC FROM THEPORT MOVE.L (A0)+,(A1)+ ;COPY PNSIZE FROM THEPORT MOVE.W (A0)+,(A1)+ ;COPY PNMODE FROM THEPORT MOVE.L (A0)+,(A1)+ ;COPY PNPAT FROM THEPORT MOVE.L (A0)+,(A1)+ ;ALL 8 BYTES MOVE.L (SP)+,(SP) ;STRIP 4 BYTES RTS ;AND RETURN .PROC GetPen,1 ;---------------------------------------------------------- ; ; PROCEDURE GetPen(VAR pt: Point); ; { inquire the current pen location } ; MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT MOVE.L 4(SP),A1 ;POINT TO VAR PT MOVE.L PNLOC(A0),(A1) ;GET PNLOC FROM THEPORT MOVE.L (SP)+,(SP) ;STRIP 4 BYTES RTS ;AND RETURN .PROC PenSize,2 ;---------------------------------------------------------- ; ; PROCEDURE PenSize(width,height: INTEGER); ; { set the pen width and height } ; MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT MOVE.L 4(SP),PNSIZE(A0) ;SET PEN WIDTH AND HEIGHT MOVE.L (SP)+,(SP) ;STRIP 4 BYTES RTS ;AND RETURN .PROC PenMode,1 .REF PortWord ;---------------------------------------------------------- ; ; PROCEDURE PenMode(mode: INTEGER); ; { set the transfer mode for line drawing } ; MOVEQ #PNMODE,D0 ;PUT PORT OFFSET IN D0 JMP PORTWORD ;INSTALL PARAM INTO THEPORT .PROC PenPat,1 ;---------------------------------------------------------- ; ; PROCEDURE PenPat(pat: Pattern); ; { set the pattern for line drawing } ; MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT LEA PNPAT(A0),A0 ;POINT TO PNPAT MOVE.L 4(SP),A1 ;POINT TO INPUT PATTERN MOVE.L (A1)+,(A0)+ ;COPY PATTERN INTO THEPORT MOVE.L (A1)+,(A0)+ ;ALL 8 BYTES MOVE.L (SP)+,(SP) ;STRIP 4 BYTES RTS ;AND RETURN .PROC PenNormal,0 ;---------------------------------------------------------- ; ; PROCEDURE PenNormal; ; { restore all line drawing parameters to normal } ; MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS MOVE.L THEPORT(A0),A0 ;GET CURRENT GRAFPORT MOVE.L #$00010001,PNSIZE(A0) ;PEN SIZE:=1,1 MOVE #8,PNMODE(A0) ;PENMODE:=PATTERN COPY MOVEQ #-1,D0 MOVE.L D0,PNPAT(A0) ;PNPAT:=BLACK MOVE.L D0,PNPAT+4(A0) RTS .END