UNIT PCMD1; {Contour lines} INTERFACE {$R-} { range checking off} {$SC+} { short circuit AND & OR statements in IF's} USES memtypes, OSIntf, ToolIntf, SANE, PackIntf; CONST MaxPixelsPerLine = 2048; WhiteC = 0; BlackC = 255; {returnCodes} No_Change = 0; CMDperiod = -10000; Changed = -20000; CMDperiod_and_changed = -30000; TYPE PCmdBlock = RECORD Primary : ptr; {all changes are made to primary} Secondary : ptr; {NIL if it couldn't load, or didn't exist} OptionKeyDownCall : boolean; ShiftKeyDownCall : boolean; NLines : integer; PixelsPerLine : integer; BytesPerRow : integer; sPixelsPerLine : integer; sBytesPerRow : integer; sNLines : integer; RoiRect : rect; Rectangular : boolean; {T/F} mask : ptr; ReturnCode : OSErr; {0=okay, <0 = changed,CommandPeriod, or both} FgColor : integer; iScale:extended; {extended - # of pixels per unit} iunits:string[2]; {2 characters - calibration units} MyOSPort : GrafPtr; END; PCmdBlockPtr = ^PcmdBlock; UnsignedByte=0..255; LineType=PACKED ARRAY[0..MaxPixelsperLine] OF UnsignedByte; { MAIN entry point} PROCEDURE DoPCommand (pData1:PCmdBlockptr); IMPLEMENTATION PROCEDURE DoPCommand (pData1:PCmdBlockptr); VAR pData : PCMDBlock; PROCEDURE dumbBeep; BEGIN sysbeep(1); END; FUNCTION blankLine : linetype; VAR i:integer; jl : linetype; BEGIN for i:=0 to MaxPixelsPerLine-1 do jl[i]:=whiteC; blankline:=jl; END; {blankline} PROCEDURE GetLine(h,v,count:integer; VAR line:LineType); VAR offset:LongInt; p:ptr; BEGIN IF pdata.primary=NIL then BEGIN line:=BlankLine; exit(GetLine); END; IF (h<0) OR (v<0) OR ((h+count)>pdata.PixelsPerLine) OR (v>=pdata.nlines) THEN BEGIN line:=BlankLine; exit(GetLine); END; offset:=LongInt(v)*pdata.BytesPerRow+h; p:=ptr(ord4(pdata.Primary)+offset); BlocKMove(p,@line,count); END; {getline} PROCEDURE GetBGLine(h,v,count:integer; VAR line:LineType); VAR offset:LongInt; p:ptr; BEGIN IF pdata.secondary=NIL then BEGIN line:=BlankLine; exit(GetBGLine); END; IF (h<0) OR (v<0) OR ((h+count)>pdata.sPixelsPerLine) OR (v>=pdata.snlines) THEN BEGIN line:=BlankLine; exit(GetBGLine); END; offset:=LongInt(v)*pdata.sBytesPerRow+h; p:=ptr(ord4(pdata.secondary)+offset); BlocKMove(p,@line,count); END; {getBGline} PROCEDURE GetMaskLine(h,v,count:integer; VAR line:LineType); VAR offset:LongInt; p:ptr; BEGIN IF pdata.mask=NIL then BEGIN line:=BlankLine; exit(GetMaskLine); END; IF (h<0) OR (v<0) OR ((h+count)>pdata.PixelsPerLine) OR (v>=pdata.nlines) THEN BEGIN line:=BlankLine; exit(GetMaskLine); END; offset:=LongInt(v)*pdata.BytesPerRow+h; p:=ptr(ord4(pdata.mask)+offset); BlocKMove(p,@line,count); END; {getMaskline} PROCEDURE PutLine(h,v,count:integer; VAR line:LineType); VAR offset:LongInt; p:ptr; BEGIN if pdata.primary=NIL then exit(putLine); IF (h<0) OR (v<0) OR (v>=pdata.nlines) THEN exit(PutLine); IF (h+count)>pdata.PixelsPerLine THEN count:=pdata.PixelsPerLine-h; offset:=LongInt(v)*pdata.BytesPerRow+h; p:=ptr(ord4(pdata.primary)+offset); BlocKMove(@line,p,count); END;{PutLine} PROCEDURE GetLineUsingMask(h,v,count:integer; var line:linetype; padcolor:integer); VAR {only needed when eroding/dilating & the boundaries are assumed to be a special color} line2 : linetype; i: integer; BEGIN getline (h,v,count,line); getline(h,v,count,line2); FOR i:=0 to count-1 DO if line2[i]<>pdata.fgcolor THEN line[i]:=padcolor; END;{GetLineUsingMask} PROCEDURE PutLineUsingMask(h,v,count:integer; VAR line:LineType); VAR aLine,MaskLine:LineType; i:integer; BEGIN GetLine(h,v,count,aline); GetMaskLine(h,v,count,MaskLine); FOR i:=0 TO count-1 DO IF MaskLine[i]=pdata.fgcolor THEN aLine[i]:=line[i]; PutLine(h,v,count,aLine); END; FUNCTION CommandPeriod:boolean; TYPE KeyPtrType=^KeyMap; VAR KeyPtr:KeyPtrType; keys:ARRAY[0..3] OF LongInt; event : eventrecord; BEGIN systemtask; KeyPtr:=KeyPtrType(@keys); GetKeys(KeyPtr^); CommandPeriod:=(BAND(keys[1],$808000))=$808000; END; PROCEDURE SetDialogItem(TheDialog:DialogPtr; item,value:integer); VAR ItemType:integer; ItemBox:rect; ItemHdl:handle; BEGIN GetDItem (TheDialog,item,ItemType,ItemHdl,ItemBox); SetCtlValue(ControlHandle(ItemHdl),value) END;{SetDialogItem} PROCEDURE ShowWatch; VAR watch:CursHandle; BEGIN watch := GetCursor(WatchCursor); SetCursor(watch^^); END; PROCEDURE OutlineButton(theDialog: DialogPtr; itemNo, CornerRad: integer); { Draws a border around a button. 16 is the normal cornerRad for small buttons } VAR itemType: Integer; itemBox: Rect; itemHdl: Handle; tempPort: GrafPtr; BEGIN GetPort(tempPort); SetPort(theDialog); GetDItem(theDialog, itemNo, itemType, itemHdl, itemBox); PenSize(3, 3); InSetRect(itemBox, -4, -4); FrameRoundRect(itemBox, cornerRad, cornerRad); PenSize(1,1); SetPort(tempPort); END;{OutlineButton} FUNCTION GetDNum(TheDialog:DialogPtr; item:integer):LongInt; VAR ItemType:integer; ItemBox:rect; ItemHdl:handle; str:str255; n:LongInt; BEGIN GetDItem (TheDialog,item,ItemType,ItemHdl,ItemBox); GetIText(ItemHdl,str); {look for '.' and use everything before that character...} StringToNum(str,n); GetDNum:=n; END; VAR h,c,i,j,p : integer; {for scanning entire area} irect : rect; L1,L2 : linetype; {space for 2 incoming lines} Result : linetype; {result from processing} ptr1,ptr2,shuffle : ^linetype; {pointing at all 3 lines} width,height,prec,prev,value : integer; ContourVal : Array[1..16] of integer; mylog : dialogptr; flag : Boolean; BEGIN {contours} pdata:=pdata1^; initcursor; p:=5; {default is 5 contours} mylog:=GetNewDialog(2000,nil,pointer(-1)); OutlineButton(MyLog,ok,16); SelIText(MyLog,3,0,32767); Repeat {until OK or cancel} ModalDialog(Nil,i); IF (i=3) THEN p:=GetDNum(mylog,3); {number of contour lines} Until ((i=OK) and (p>=1) AND (p<=16)) or (i=cancel); DisposDialog(mylog); IF (i=cancel) THEN BEGIN pdata.ReturnCode:=pdata.ReturnCode+CMDperiod; pdata1^:=pdata; Exit(DoPCommand); END; pdata.ReturnCode:=changed; For i:=1 to p DO ContourVal[i]:= (i*255) DIV (p+1); irect:=pdata.roirect; {bottom is not inclusive in process area} with irect,pdata DO BEGIN width:=right-left; height:=bottom-top; END; {set up top 2 lines before entering loop} ptr1:=@L1;ptr2:=@L2; shuffle:=NIL; GetLine(irect.left,irect.top,width,ptr1^); FOR i:=irect.top to irect.bottom-2 DO BEGIN GetLine(irect.left,i+1,width,ptr2^); prec:=L2[0]; {left} For c:=0 to width-1 DO BEGIN prev :=L1[c]; value:=L2[c]; flag:=false; For h:=1 to p DO BEGIN j:=ContourVal[h]; if (((value<=j) and (prec>j)) OR ((value>j) and (prec<=j))) OR (((value<=j) and (prev>j)) OR ((value>j) and (prev<=j))) THEN BEGIN result[c]:=j; flag:=true; END; END;{for h} if NOT flag then result[c]:=0; prec :=value; END; {for c} if pdata.rectangular THEN PutLine(irect.left,i,width,result) ELSE PutLineUsingMask(irect.left,i,width,result); shuffle:=ptr1; ptr1:=ptr2; ptr2:=shuffle; IF commandperiod then BEGIN sysbeep(1); pdata.ReturnCode:=pdata.ReturnCode+CMDperiod; pdata1^:=pdata; Exit(DoPCommand); END; END; {for i} {clone last real line into bottom} if pdata.rectangular THEN PutLine(irect.left,irect.bottom-1,width,result) ELSE PutLineUsingMask(irect.left,irect.bottom-1,width,result); pData1^:=pdata; END; {DoPCommand} END. {UNIT}