UNIT PCMD1; {Thresholded derivative and selective sharpening} INTERFACE {$R-} { range checking off} {$SC+} { short circuit AND & OR statements in IF's} USES memtypes, OSIntf, ToolIntf; 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; SArray=Array[1..25] of integer; { 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} VAR c,h,i,j : integer; {for scanning entire area} irect : rect; L1,L2,L3,L4,L5 : linetype; {space for 5 incoming lines} Result : linetype; {result from processing} ptr1,ptr2,ptr3,ptr4,ptr5, shuffle : ^linetype; {pointing at all 5 lines} width,height : integer; DArray:array[1..4] of longint; k,m,swap,s,t : integer; mylog : dialogptr; BEGIN pdata:=pdata1^; t:=128; j:=6; initcursor; mylog:=GetNewDialog(2000,nil,pointer(-1)); OutlineButton(MyLog,ok,16); SetDialogItem(Mylog,j,1); Repeat {until OK or cancel} ModalDialog(Nil,i); IF (i>=3) AND (i<=10) THEN BEGIN SetDialogItem(Mylog,j,0); j:=i; SetDialogItem(MyLog,j,1); END; Until (i=OK) or (i=cancel); DisposDialog(mylog); IF (i=cancel) THEN BEGIN pdata.ReturnCode:=pdata.ReturnCode+CMDperiod; pdata1^:=pdata; Exit(DoPCommand); END; case j of 3:t:=512; 4:t:=256; 6:t:=128; 7:t:=64; 8:t:=32; 9:t:=16; 10:t:=8; end; {case} pdata.ReturnCode:=changed; irect:=pdata.roirect; {bottom is not inclusive in process area} with irect,pdata DO BEGIN if top<2 then top:=2; {avoid top 2 lines} if left<2 then left:=2; if bottom>nlines-2 then bottom:=nlines-2; if right>PixelsperLine-2 then right:=PixelsPerLine-2; width:=right-left; height:=bottom-top; END; {set up top 4 lines before entering loop} ptr1:=@L1;ptr2:=@L2;ptr3:=@L3;ptr4:=@L4;ptr5:=@L5; shuffle:=NIL; GetLine(irect.left-2,irect.top-2,width+4,ptr1^); GetLine(irect.left-2,irect.top-1,width+4,ptr2^); GetLine(irect.left-2,irect.top ,width+4,ptr3^); GetLine(irect.left-2,irect.top+1,width+4,ptr4^); { top of the loop} FOR i:=irect.top to irect.bottom-1 DO BEGIN GetLine(irect.left-2,i+2,width+4,ptr5^); for j:=2 to width+1 DO BEGIN DArray[ 1]:=abs(ptr1^[j-2]+ptr1^[j-1]+ptr2^[j-2]+ptr2^[j-1] -ptr4^[j+1]-ptr4^[j+2]-ptr5^[j+1]-ptr5^[j+2]); DArray[ 2]:=abs(ptr3^[j-2]+ptr3^[j-1]+ptr2^[j-2]+ptr4^[j-2] -ptr3^[j+1]-ptr3^[j+2]-ptr2^[j+2]-ptr4^[j+2]); DArray[ 3]:=abs(ptr5^[j-2]+ptr5^[j-1]+ptr4^[j-2]+ptr4^[j-1] -ptr4^[j+1]-ptr4^[j+2]-ptr5^[j+1]-ptr5^[j+2]); DArray[ 4]:=abs(ptr1^[j ]+ptr2^[j ]+ptr1^[j-1]+ptr1^[j+1] -ptr5^[j ]-ptr4^[j ]-ptr5^[j-1]-ptr5^[j+1]); c:=DArray[1];s:=1; For m:=2 to 4 DO IF DArray[j]>c then BEGIN s:=m; c:=DArray[m]; END; IF c>t THEN BEGIN k:=3*ptr3^[j]; Case s of 1:k:=k-ptr2^[j-1]-ptr4^[j+1]; 2:k:=k-ptr3^[j-1]-ptr3^[j+1]; 3:k:=k-ptr2^[j+1]-ptr4^[j-1]; 4:k:=k-ptr2^[ j ]-ptr4^[ j ]; end; END Else k:=ptr3^[j]; if k>255 then Result[j-2]:=255 ELSE if k<0 THEN Result[j-2]:=0 ELSE Result[j-2]:=trunc(k); END; {for j} if pdata.rectangular THEN PutLine(irect.left,i,width,result) ELSE PutLineUsingMask(irect.left,i,width,result); shuffle:=ptr1; ptr1:=ptr2; ptr2:=ptr3; ptr3:=ptr4; ptr4:=ptr5; ptr5:=shuffle; IF commandperiod then BEGIN sysbeep(1); pdata.ReturnCode:=pdata.ReturnCode+CMDperiod; pdata1^:=pdata; Exit(DoPCommand); END; END; {for i} pData1^:=pdata; END; {DoPCommand} END. {UNIT}