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supermario/base/SuperMarioProj.1994-02-09/QuickDraw/Patches/DrawPicturePatch.a
Elliot Nunn 2e16381318 Bring in sources, and document
2019-06-29 23:17:50 +08:00

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;EASE$$$ READ ONLY COPY of file “DrawPicturePatch.a”
; 1.0 CCH 11/16/1988 Added to EASE.
; END EASE MODIFICATION HISTORY
;
; File DrawPicturePatch.a
;
; Copyright © 1987 Apple Computer, Inc. All rights reserved.
;
; S051 19Feb87 DBG Fixed bug in interpretation of color table
; S072 27Feb87 DBG Added support for interpolated colors
; PMA157 30Mar87 DBG Fixed bug where color table was freed even if there
; wasn't one.
; PMA207 16Jul87 EHB If device color table found, fill in pixel values
; PMAB270 13Sep87 FJL Patch DrawPicture to first check for valid picture handle and pointer,
; then do GetState, make it non-purgeable, and SetState on return.
; At the request of Sheila, Phil and Scott.
;_______________________________________________________________________________________
IF (&TYPE('onMac') = 'UNDEFINED') THEN
onMac EQU 0
ENDIF
IF (&TYPE('onMacPP') = 'UNDEFINED') THEN
onMacPP EQU 0
ENDIF
noROM EQU 0
;
; Common base addresses
;
IF onMac THEN
DPEntry EQU $0040DAEC
GetVers EQU $0040DDA2
ELSEIF onMacPP THEN
DPEntry EQU $00418268
GetVers EQU $0041852E
ENDIF
MACRO
PUNLINK
.*--------------------------------------------------------------
.*
.* PUNLINK A6, STRIP PARAMETERS, AND RETURN.
.*
.* FIRST PARAM IS NUMBER OF BYTES OF STACK BIAS.
.*
UNLK A6 ;RELEASE LOCAL VARIABLES
.*
IF &Eval(&Syslst[1])=0 THEN;NO PARAMETERS ?
RTS ;THEN JUST RTS
.*
ELSEIF &Eval(&Syslst[1])=4 THEN;4 BYTES ?
MOVE.L (SP)+, (SP) ;STRIP PARAMETERS
RTS ;RETURN
ELSE
MOVE.L (SP)+, A0 ; RETURN ADDRESS
ADD #&Syslst[1], SP ;STRIP PARAMETERS
JMP (A0) ;RETURN
ENDIF
.*
ENDM
;
; Most of the code following this point is filched from pictures.a.
;
; General notes:
;
; The Color QD version of DrawPicture has an extended play state record.
; We want to jump into ROM here and there in order to save system heap
; space. To do this, we must keep the stack frame layout below A6 the
; same as in the existing ROM. So, we do some slimy tricks to break the
; play state record into two parts: the existing part, and an extension
; placed below other stuff in the stack frame.
;
NewStdGetPic FUNC EXPORT
;------------------------------------------------------------------
;
; PROCEDURE StdGetPic(dataPtr: QDPtr; byteCount: INTEGER);
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (StdGetPic) (StdGetPic)
;
;
MOVE.L (SP)+,A0 ;POP RETURN ADDR
MOVE (SP)+,D1 ;POP BYTECOUNT
MOVE.L (SP)+,A1 ;POP DATAPTR
MOVE.L A0,-(SP) ;PUSH RETURN ADDR
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS
MOVE.L PLAYINDEX(A0),D0 ;GET PLAYINDEX
MOVE.L PLAYPIC(A0),A0 ;GET PLAY PICHANDLE
MOVE.L (A0),A0 ;DE-REFERENCE IT
ADD.L D0,A0 ;ADD PLAYINDEX
BRA.S START ;GO TO LOOP START
NXTBYTE MOVE.B (A0)+,(A1)+ ;COPY ONE BYTE
START DBRA D1,NXTBYTE ;LOOP FOR ALL BYTES
RTS ;AND RETURN
NewDrawPicture PROC EXPORT
IMPORT PicItem1
;------------------------------------------------------------------
;
; PROCEDURE DrawPicture(myPicture: PicHandle; dstRect: Rect);
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (DrawPicture) (DrawPicture)
;
;--------------------------------------------
;
; OFFSETS WITHIN A PICTURE PLAY STATE RECORD:
;
; *** NOTE *** This information appears in two places: DrawPicture
; and PICITEM1.
;
THERECT EQU 0 ;RECT
PENLOC EQU THERECT+8 ;POINT
TEXTLOC EQU PENLOC+4 ;POINT
OVALSIZE EQU TEXTLOC+4 ;POINT
FROMRECT EQU OVALSIZE+4 ;RECT
TORECT EQU FROMRECT+8 ;RECT
NUMER EQU TORECT+8 ;POINT
DENOM EQU NUMER+4 ;POINT
THECLIP EQU DENOM+4 ;RGNHANDLE
USERCLIP EQU THECLIP+4 ;RGNHANDLE
PLAYREC EQU USERCLIP+4 ;End of OLD PLAYREC
; Allocate the extension below the rest of DrawPicture's stack frame.
NEWHFRAC EQU THERECT-PORTREC-2 ;UPDATED FRACTION RECEIVED
TXHFRAC EQU NEWHFRAC-2 ;FRACTIONAL TEXT POSITION
PLAYVERSION EQU TXHFRAC-2 ;PICTURE VERSION
SAVECURSTATE EQU PLAYVERSION-2 ;Save state of pic handle <FJL PMAB270>
PLAYREC2 EQU NEWHFRAC+2-SAVECURSTATE ;Length of PLAYREC extension <FJL PMAB270>
;+++PLAYREC2 EQU NEWHFRAC+2-PLAYVERSION ;Length of PLAYREC extension
;
; A6 OFFSETS OF PARAMS AND LOCALS AFTER LINK:
;
PARAMSIZE EQU 8
MYPICTURE EQU PARAMSIZE+8-4 ;LONG, PICHANDLE
DSTRECT EQU MYPICTURE-4 ;LONG, ADDR OF RECT
PLAYSTATE EQU -PLAYREC ;PICTURE PLAY STATE RECORD
SAVEPORT EQU PLAYSTATE-PORTREC ;GRAFPORT RECORD
PLAYSTATE2 EQU SAVEPORT-PLAYREC2 ;PLAY STATE EXTENSION
VARSIZE EQU PLAYSTATE2 ;TOTAL BYTES OF LOCALS
LINK A6,#VARSIZE ;ALLOCATE LOCALS
MOVEM.L D3-D7/A2-A4,-(SP) ;SAVE REGISTERS
MOVE.L GRAFGLOBALS(A5),A4 ;POINT TO QUICKDRAW GLOBALS
MOVE.L THEPORT(A4),A3 ;POINT TO CURRENT GRAFPORT
TST.L MYPICTURE(A6) ;IS PICHANDLE NIL ?
BEQ GOHOME ;YES, QUIT
;--------------------------------------------------
;
; SET UP NUMER AND QUIT IF DSTRECT WIDTH OR HEIGHT IS <= 0
; COPY DSTRECT INTO TORECT
;
MOVE.L DSTRECT(A6),A0 ;POINT TO DSTRECT
MOVE RIGHT(A0),D0
SUB LEFT(A0),D0 ;CALC DST WIDTH
BLE GOHOME ;QUIT IF WIDTH <= 0
MOVE D0,PLAYSTATE+NUMER+H(A6) ;NUMER.H := DST WIDTH
MOVE BOTTOM(A0),D0
SUB TOP(A0),D0 ;CALC DST HEIGHT
BLE GOHOME ;QUIT IF HEIGHT <= 0
MOVE D0,PLAYSTATE+NUMER+V(A6) ;NUMER.V := DST HEIGHT
LEA PLAYSTATE+TORECT(A6),A1
MOVE.L (A0)+,(A1)+
MOVE.L (A0)+,(A1)+ ;TORECT := DSTRECT
;--------------------------------------------------
;
; SET UP DENOM AND QUIT IF PICFRAME WIDTH OR HEIGHT IS <= 0
; COPY PICFRAME INTO FROMRECT.
;
MOVE.L MYPICTURE(A6),A0 ;GET PICHANDLE
MOVE.L (A0),A0 ;DE-REFERENCE IT
MOVE.L A0, D0 ;SET CONDITION CODE <FJL PMAB270>
BEQ GOHOME ;IF INVALID POINTER -> EXIT <FJL PMAB270>
LEA PICFRAME(A0),A0 ;POINT TO PICTURE FRAME
MOVE RIGHT(A0),D0
SUB LEFT(A0),D0 ;CALC SRC WIDTH
BLE GOHOME ;QUIT IF WIDTH <= 0
MOVE D0,PLAYSTATE+DENOM+H(A6) ;DENOM.H := SRC WIDTH
MOVE BOTTOM(A0),D0
SUB TOP(A0),D0 ;CALC SRC HEIGHT
BLE GOHOME ;QUIT IF HEIGHT <= 0
MOVE D0,PLAYSTATE+DENOM+V(A6) ;DENOM.V := SRC HEIGHT
LEA PLAYSTATE+FROMRECT(A6),A1 ;POINT TO FROMRECT
MOVE.L (A0)+,(A1)+
MOVE.L (A0)+,(A1)+ ;FROMRECT := PICFRAME
;---------------------------------------------------
;
; PRESERVE THE CURRENT GRAFPORT IN SAVEPORT
;
MOVE.L A3,A0 ;SRC = THEPORT
LEA SAVEPORT(A6),A1 ;DST = SAVEPORT
MOVEQ #PORTREC/2-1,D0 ;INIT DBRA COUNT
SAVELP MOVE.W (A0)+,(A1)+ ;COPY A WORD
DBRA D0,SAVELP ;LOOP ENTIRE PORT
;----------------------------------------
;
; INIT GLOBAL VARS:
;
MOVE.L MYPICTURE(A6), A0 ;SAVE STATE OF PICTURE HANDLE <FJL PMAB270>
_HGetState
MOVE.B D0, SAVECURSTATE(A6) ;SAVE IN STACK FRAME
MOVE.L MYPICTURE(A6), A0 ;MAKE IT NON-PURGEABLE FOR THE DURATION
_HNoPurge ; <FJL PMAB270>
CLR.L PATALIGN(A4) ;PATALIGN := (0,0)
MOVE.L MYPICTURE(A6),PLAYPIC(A4) ;SAVE PICTURE FOR STDGETPIC
MOVE.L #PICDATA,PLAYINDEX(A4) ;INIT INDEX TO FIRST OPCODE
;----------------------------------------
;
; INIT PLAY STATE RECORD:
;
LEA PLAYSTATE(A6),A0
CLR.L (A0)+ ;THERECT := (0,0,0,0)
CLR.L (A0)+
CLR.L (A0)+ ;PENLOC := (0,0)
CLR.L (A0)+ ;TEXTLOC := (0,0)
CLR.L (A0)+ ;OVALSIZE := (0,0)
;FROMRECT SET UP
;TORECT SET UP
;NUMER SET UP
;DENOM SET UP
MOVE.L CLIPRGN(A3),PLAYSTATE+USERCLIP(A6) ;SAVE USER CLIPRGN
CLR.L -(SP)
_NEWRGN
MOVE.L (SP)+,PLAYSTATE+THECLIP(A6) ;ALLOCATE THECLIP
; MOVE #$8000,D0 ;INITIALIZE FRACTIONAL PARTS
; MOVE D0,PLAYSTATE+TXHFRAC(A6) ;TXHFRAC = 1/2
; MOVE D0,PLAYSTATE+FRACFLAG(A6) ;NEW FRACTION = 1/2
;--------------------------------------------------------
;
; INIT MOST FIELDS OF THEPORT
;
CLR.L -(SP)
_NEWRGN
MOVE.L (SP)+,CLIPRGN(A3) ;ALLOCATE TEMP CLIPRGN
LEA BKPAT(A3),A0 ;POINT TO BKPAT
CLR.L (A0)+ ;BKPAT := WHITE
CLR.L (A0)+
MOVEQ #-1,D0 ;GET SOME BLACK
MOVE.L D0,(A0)+ ;fillPat := BLACK
MOVE.L D0,(A0)+
CLR.L (A0)+ ;PNLOC := (0,0)
MOVE.L #$00010001,D1
MOVE.L D1,(A0)+ ;pnSize := (1,1)
MOVE #8,(A0)+ ;pnMode := patCopy
MOVE.L D0,(A0)+ ;pnPat := black
MOVE.L D0,(A0)+
ADD #2,A0 ;skip over pnVis
CLR.L (A0)+ ;txFont, txFace := 0
MOVE #1,(A0)+ ;txMode := srcOr
CLR (A0)+ ;txSize := 0;
CLR.L (A0)+ ;spExtra := 0.0;
MOVE.L #blackColor,(A0)+ ;FGCOLOR := blackColor
MOVE.L #whiteColor,(A0)+ ;BKCOLOR := whiteColor
;LEAVE COLRBIT ALONE
;LEAVE PATSTRETCH ALONE
;LEAVE PICSAVE ALONE
;LEAVE RGNSAVE ALONE
;LEAVE POLYSAVE ALONE
;LEAVE GRAFPROCS ALONE
;---------------------------------------------------
;
; NOW DRAW THE PICTURE:
; REPEAT UNTIL NOT PicItem1(playState);
;
DRAWPIC MOVE #PICTVERSION,PLAYSTATE+PLAYVERSION(A6) ;DEFAULT TO OLD PICTURE
MORE CLR.B -(SP) ;MAKE ROOM FOR FCN RESULT
PEA PLAYSTATE(A6) ;PUSH ADDR OF PLAYSTATE
JSR PicItem1 ;DRAW ONE PICTURE ITEM
MOVE.B (SP)+,D0 ;POP BOOLEAN RESULT
BNE MORE ;LOOP TILL FALSE
;-----------------------------------------------------
;
; DISCARD HANDLES, RESTORE GRAFPORT STATE AND QUIT
;
IF noROM THEN
DONE
MOVE.L MYPICTURE(A6), A0 ;GET PIC HANDLE <FJL PMAB270>
MOVE.B SAVECURSTATE(A6), DO ;RESTORE STATE OF PICTURE HANDLE
_HSetState ; <FJL PMAB270>
MOVE.L PLAYSTATE+THECLIP(A6),A0 ;GET THECLIP RGNHANDLE
_DisposHandle ;DISCARD IT
MOVE.L CLIPRGN(A3),A0 ;GET TEMPCLIP
_DisposHandle ;DISCARD IT
LEA SAVEPORT(A6),A0 ;SRC = SAVEPORT
MOVEQ #PORTREC/2-1,D0 ;INIT DBRA COUNT
DONELP MOVE.W (A0)+,(A3)+ ;COPY A WORD INTO THEPORT
DBRA D0,DONELP ;LOOP ENTIRE PORT
CLR.L PATALIGN(A4) ;RESTORE PATALIGN TO (0,0)
CLR.L PLAYPIC(A4) ;SET PLAYPIC TO NIL
CLR.L PLAYINDEX(A4) ;AND PLAYINDEX TO 0
GOHOME MOVEM.L (SP)+,D3-D7/A2-A4 ;RESTORE REGISTERS
PUNLINK PARAMSIZE,'DRAWPICT'
ELSE
DONE
MOVE.L MYPICTURE(A6), A0 ;GET PIC HANDLE <FJL PMAB270>
MOVE.B SAVECURSTATE(A6), D0 ;RESTORE STATE OF PICTURE HANDLE
_HSetState ; <FJLPMAB270>
JMP DPEntry+$FC ; Jump into ROM
GOHOME JMP DPEntry+$120 ; Jump into ROM
ENDIF
StdOpcodeProc PROC EXPORT
IMPORT GetLong,GetPicdata
;------------------------------------------------------------------
;
; PROCEDURE StdOpcode(fromRect,toRect: Rect; opcode,version: INTEGER);
;
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (StdOpcode) (StdOpcode)
;
; GETS CALLED FOR OPCODE VALUES $0100-$FFFF
;
; OPCODE: $0100-$01FF 2 BYTES DATA
; $0200-$02FF 4 BYTES DATA
; ...
; $7F00-$7FFF 254 BYTES DATA
; $8000-$80FF 0 BYTES DATA
; $8100-$FFFF 4 BYTES SIZE + SIZE BYTES DATA
;
; THIS PROCEDURE READS THE OPCODE'S DATA AND IGNORES IT
;
; A6 OFFSETS OF PARAMS AFTER LINK:
;
PARAMSIZE EQU 12
FROMRECT EQU PARAMSIZE+8-4 ;LONG
TORECT EQU FROMRECT-4 ;LONG
OPCODE EQU TORECT-2 ;WORD
VERSION EQU OPCODE-2 ;WORD
LINK A6,#0 ;NO LOCAL VARS
MOVEM.L D6/D7,-(SP) ;SAVE WORK REGISTERS
MOVE.L #256,D6 ;GET USEFUL NUMBER
SUB.L D6,SP ;ALLOCATE STACK BUFFER
MOVE OPCODE(A6),D0 ;GET THE OPCODE
BMI.S GETSIZE ;=>OP CONTAINS SIZE
LSR #8,D0 ;GET SIZE/2 IN LOW NIBBLE
ADD D0,D0 ;CALC SIZE
EXT.L D0 ;MAKE IT LONG
BRA.S SHARE ;=>USE COMMON CODE
GETSIZE AND #$7F00,D0 ;MASK THE OPCODE
BEQ.S DONE ;=>NO DATA BYTES
JSR GETLONG ;READ IN SIZE
SHARE MOVE.L D0,D7 ;SAVE WHOLE SIZE
NXTCHNK MOVE D6,D0 ;ASSUME SIZE >= 256
CMP.L D6,D7 ;IS SIZE >= 256?
BGE.S SIZEOK ;=>YES, SKIP 256 BYTES
MOVE D7,D0 ;ELSE SKIP REMAINING BYTES
SIZEOK MOVE.L SP,-(SP) ;PUSH BUFFER POINTER
MOVE D0,-(SP) ;PUSH BYTECOUNT
JSR GETPICDATA ;READ DATA INTO BUFFER
SUB.L D6,D7 ;SUBTRACT BUFSIZE FROM COUNT
BGT.S NXTCHNK ;=>GO SKIP NEXT CHUNK
DONE ADD.L D6,SP ;STRIP BUFFER
MOVEM.L (SP)+,D6/D7 ;RESTORE WORK REGISTERS
PUNLINK PARAMSIZE,'STDPICPR'
ENDPROC
;
; Trap table layout used for calling standard procs.
;
; ??? Conditional for 64K ROMs ???
;
IF onMac THEN
PStdTbTbl EQU $0C00 ; For 128K ROM
ELSEIF onMacPP THEN
PStdTbTbl EQU $0E00 ; For Maui
ENDIF
PStdArc EQU PStdTbTbl+(4*$BD)
PStdBits EQU PStdTbTbl+(4*$EB)
PStdComment EQU PStdTbTbl+(4*$F1)
PStdGetPic EQU PStdTbTbl+(4*$EE)
PStdLine EQU PStdTbTbl+(4*$90)
PStdOval EQU PStdTbTbl+(4*$B6)
PStdPoly EQU PStdTbTbl+(4*$C5)
PStdPutPic EQU PStdTbTbl+(4*$F0)
PStdRect EQU PStdTbTbl+(4*$A0)
PStdRgn EQU PStdTbTbl+(4*$D1)
PStdRRect EQU PStdTbTbl+(4*$AF)
PStdText EQU PStdTbTbl+(4*$82)
PStdTxMeas EQU PStdTbTbl+(4*$ED)
PicItem1 FUNC EXPORT
IMPORT GetPicData,ScalePt,MapPt,MapRect,MapRgn,MapPoly,GetUByte,GetWord,GetLong
IMPORT NewRgn,CopyRgn,SectRgn,UnpackBits,MapRatio,GetPicPixPat,GETPICTABLE,GETPM1Deep
IMPORT MapPt1
IMPORT StdOpcodeProc,RGB2OLD,SkipPicData,RGB2Pixel,MapMode
;------------------------------------------------------------------
;
; FUNCTION PicItem1(VAR playState: PicPlayRec): BOOLEAN;
;
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (PicItem1) (PicItem1)
;
; Draws one picture item, updating playState and thePort.
; Returns FALSE when an endPic opCode is encountered.
; The only state modified other than thePort and playState is patAlign.
;
; When reading from an NPIC, skips to word boundary before fetching
; word-long opcode.
;--------------------------------------------
;
; OFFSETS WITHIN A PICTURE PLAY STATE RECORD:
;
; *** NOTE *** This information appears in two places: DrawPicture
; and PICITEM1.
;
THERECT EQU 0 ;RECT
PENLOC EQU THERECT+8 ;POINT
TEXTLOC EQU PENLOC+4 ;POINT
OVALSIZE EQU TEXTLOC+4 ;POINT
FROMRECT EQU OVALSIZE+4 ;RECT
TORECT EQU FROMRECT+8 ;RECT
NUMER EQU TORECT+8 ;POINT
DENOM EQU NUMER+4 ;POINT
THECLIP EQU DENOM+4 ;RGNHANDLE
USERCLIP EQU THECLIP+4 ;RGNHANDLE
PLAYREC EQU USERCLIP+4 ;End of OLD PLAYREC
; Allocate the extension below the rest of DrawPicture's stack frame.
NEWHFRAC EQU THERECT-PORTREC-2 ;UPDATED FRACTION RECEIVED
TXHFRAC EQU NEWHFRAC-2 ;FRACTIONAL TEXT POSITION
PLAYVERSION EQU TXHFRAC-2 ;PICTURE VERSION
SAVECURSTATE EQU PLAYVERSION-2 ;Save state of pic handle <FJL PMAB270>
PLAYREC2 EQU NEWHFRAC+2-SAVECURSTATE ;Length of PLAYREC extension <FJL PMAB270>
;+++PLAYREC2 EQU NEWHFRAC+2-PLAYVERSION ;Length of PLAYREC extension
;
; params:
;
PARAMSIZE EQU 4
RESULT EQU PARAMSIZE+8 ;BOOLEAN
PLAYSTATE EQU RESULT-4 ;LONG, PICHANDLE
;
; locals:
;
HANDLE1 EQU -4 ;HANDLE
HANDLE2 EQU HANDLE1-4 ;HANDLE
DSTRECT EQU HANDLE2-8 ;RECT (MUST BE BEFORE SRCRECT)
SRCRECT EQU DSTRECT-8 ;RECT (MUST FOLLOW DSTRECT)
SRCBITS EQU SRCRECT-14 ;BITMAP (Not used)
SAMEFLAG EQU SRCBITS-2 ;BOOLEAN
NEWPT EQU SAMEFLAG-4 ;LONG
TXDATA EQU NEWPT-256 ;UP TO 256 CHARACTERS,
;ALSO USED FOR PACKBUF !!!
;Also used by CTBitMap <19Feb87 DBG>
SRCPTR EQU TXDATA-4 ;LONG
DSTPTR EQU SRCPTR-4 ;LONG
SAVESP EQU DSTPTR-4 ;LONG
; Following is the extension to the stack frame in ROM
SRCPIX EQU SAVESP-PMREC ;SRCPIX
VARSIZE EQU SRCPIX ;TOTAL BYTES OF LOCALS
LINK A6,#VARSIZE ;ALLOCATE LOCALS
MOVEM.L D3-D7/A2-A4,-(SP) ;SAVE REGISTERS
MOVE.L SP,SAVESP(A6) ;REMEMBER STACK FOR ABORT
MOVE.L GRAFGLOBALS(A5),A4 ;POINT TO QUICKDRAW GLOBALS
MOVE.L THEPORT(A4),A3 ;POINT TO CURRENT GRAFPORT
; GET PICTURE OPCODE AND CHECK FOR END OF PICTURE.
CLR.B RESULT(A6) ;ASSUME END OF PICTURE
BSR GetPicOp ;READ OPCODE INTO D0
MOVE D0,D7 ;PUT IT IN D7
CMP #opEndPic,D7 ;IS THIS THE ENDPIC OPCODE ?
BEQ DONE ;=>YES, ALL DONE
BLO.S GoodOp ;=>GOOD OPCODE, CONTINUE
; IT'S AN OPCODE THAT WE DON'T KNOW HOW TO HANDLE. CALL THE OPCODE PROC.
LEA StdOpcodeProc,A0 ;USE STANDARD OPCODE PROC
USESTD MOVE.L PLAYSTATE(A6),A2 ;GET THE PLAYSTATE RECORD
PEA FROMRECT(A2) ;PUSH SRC RECT
PEA TORECT(A2) ;PUSH DST RECT
MOVE D7,-(SP) ;PUSH OPCODE
MOVE PLAYVERSION(A2),-(SP) ;PUSH VERSION
JSR (A0) ;CALL PROC
MOVE.B #1,RESULT(A6) ;FLAG NOT END OF PICTURE
BRA DONE ;=>DONE WITH THIS OPCODE
GoodOp MOVE.B #1,RESULT(A6) ;NOT END OF PICTURE
; CHECK FOR PARAM OPCODES $00..$1F
CMP #$20,D7 ;IS IT A PARAM OPCODE ?
BLO.S PARAMOP ;YES, GO TO IT
; GET LO AND HI NIBBLES OF OPCODE, AND CASE ON HI NIBBLE (NOUN).
MOVE.B D7,D0 ;COPY OPCODE
AND #$F0,D0 ;MASK FOR HI NIBBLE
BTST #3,D7 ;IS OPCODE BIT 3 SET ?
SNE SAMEFLAG(A6) ;REMEMBER IN SAMEFLAG
AND #$7,D7 ;GET VERB FROM LO NIBBLE
LSR #3,D0 ;DOUBLE HI NIBBLE FOR INDEX
MOVE NOUNJMP(D0),D0 ;GET JUMP OFFSET
JMP NOUNJMP(D0) ;TAKE CASE JUMP
NOUNJMP DC.W DONE-NOUNJMP ;NEVER TAKEN
DC.W DONE-NOUNJMP ;NEVER TAKEN
DC.W TXLNOP-NOUNJMP
DC.W RECTOP-NOUNJMP
DC.W RRECTOP-NOUNJMP
DC.W OVALOP-NOUNJMP
DC.W ARCOP-NOUNJMP
DC.W POLYOP-NOUNJMP
DC.W RGNOP-NOUNJMP
DC.W BITSOP-NOUNJMP
DC.W COMMOP-NOUNJMP
DC.W DONE-NOUNJMP ;OPCODE WITH NO DATA
DC.W DONE-NOUNJMP ;OPCODE WITH NO DATA
DC.W IGNORESHORT-NOUNJMP ;IGNORE WORD LENGTH, DATA
DC.W IGNORELONG-NOUNJMP ;IGNORE LONG LENGTH, DATA
DC.W IGNORELONG-NOUNJMP ;IGNORE LONG LENGTH, DATA
;---------------------------------------------------
;
; OPCODES $00..$1F DO NO DRAWING, THEY JUST SET PARAMETERS.
;
PARAMOP AND #$1F,D7 ;GET LO 5 BITS OF OPCODE
ADD D7,D7 ;DOUBLE PARAM FOR CASE INDEX
MOVE PARMJMP(D7),D0 ;GET CASE JUMP OFFSET
JMP PARMJMP(D0) ;TAKE CASE JUMP
PARMJMP DC.W DONE-PARMJMP ;OPCODE 0 IS PURPOSELY A NOP
DC.W XCLIP-PARMJMP ;OPCODE $01
DC.W XBKPAT-PARMJMP ;OPCODE $02
DC.W XTXFONT-PARMJMP ;OPCODE $03
DC.W XTXFACE-PARMJMP ;OPCODE $04
DC.W XTXMODE-PARMJMP ;OPCODE $05
DC.W XSPXTRA-PARMJMP ;OPCODE $06
DC.W XPNSIZE-PARMJMP ;OPCODE $07
DC.W XPNMODE-PARMJMP ;OPCODE $08
DC.W XPNPAT-PARMJMP ;OPCODE $09
DC.W XFILLPAT-PARMJMP ;OPCODE $0A
DC.W XOVSIZE-PARMJMP ;OPCODE $0B
DC.W XORIGIN-PARMJMP ;OPCODE $0C
DC.W XTXSIZE-PARMJMP ;OPCODE $0D
DC.W XFGCOL-PARMJMP ;OPCODE $0E
DC.W XBKCOL-PARMJMP ;OPCODE $0F
DC.W TXRATIO-PARMJMP ;OPCODE $10
DC.W VERSION-PARMJMP ;OPCODE $11
DC.W XBkPixPat-PARMJMP ;OPCODE $12
DC.W XPnPixPat-PARMJMP ;OPCODE $13
DC.W XFillPixPat-PARMJMP ;OPCODE $14
DC.W XPnLocHFrac-PARMJMP ;OPCODE $15
DC.W XChExtra-PARMJMP ;OPCODE $16
DC.W DONE-PARMJMP ;OPCODE $17
DC.W DONE-PARMJMP ;OPCODE $18 (opIFore)
DC.W DONE-PARMJMP ;OPCODE $19 (opIBack)
DC.W XRGBFGCOL-PARMJMP ;OPCODE $1A
DC.W XRGBBKCOL-PARMJMP ;OPCODE $1B
DC.W xHiliteMode-PARMJMP ;OPCODE $1C
DC.W xHiliteColor-PARMJMP ;OPCODE $1D
DC.W xDefHilite-PARMJMP ;OPCODE $1E
DC.W xOpColor-PARMJMP ;OPCODE $1F
XCLIP BSR GETHNDL ;COPY RGN INTO HANDLE1
IF noROM THEN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L HANDLE1(A6),-(SP) ;PUSH HANDLE1
MOVE.L THECLIP(A2),-(SP) ;PUSH PLAYSTATE THECLIP
XCLIP2 _COPYRGN ;COPY HANDLE1 INTO THECLIP
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L HANDLE1(A6),-(SP) ;PUSH HANDLE1 TEMP
PEA FROMRECT(A2) ;PUSH FROMRECT
PEA TORECT(A2) ;PUSH TORECT
_MAPRGN ;MAP RGN INTO DST COORDS
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L HANDLE1(A6),-(SP) ;PUSH MAPPED RGN
MOVE.L USERCLIP(A2),-(SP) ;PUSH ORIGINAL CLIP
MOVE.L CLIPRGN(A3),-(SP) ;PUSH DST = THEPORT^.CLIPRGN
_SECTRGN ;PUT INTERSECT INTO CLIPRGN
BRA KILL1 ;DISCARD HANDLE1 AND QUIT
ELSE
JMP DPEntry+$1EC ; Jump into ROM
XCLIP2 JMP DPEntry+$1F8 ; Jump into ROM
ENDIF
GET8 MOVEQ #8,D6 ;BYTECOUNT = 8
BRA GETDONE ;COPY 8 BYTES AND QUIT
GET4 MOVEQ #4,D6 ;BYTECOUNT = 4
BRA GETDONE ;COPY 4 BYTES AND QUIT
GET2 MOVEQ #2,D6 ;BYTECOUNT = 2
BRA GETDONE ;COPY 2 BYTES AND QUIT
GETMODE JSR GETWORD ;GET THE MODE WORD
JSR MAPMODE ;GET EQUIVALENT MODES
MOVE.W D0,(A3) ;SAVE IT
BRA DONE ;QUIT
XFGCOL LEA FGCOLOR(A3),A3
BRA GET4 ;GET FOREGROUND COLOR
XBKCOL LEA BKCOLOR(A3),A3
BRA GET4 ;GET BACKGROUND COLOR
XBKPAT LEA BKPAT(A3),A3
BRA GET8 ;GET BKPAT
XTXFONT LEA TXFONT(A3),A3
BRA GET2 ;GET TXFONT
XTXFACE LEA TXFACE(A3),A3
MOVEQ #1,D6
BRA GETDONE ;GET TXFACE
XTXMODE LEA TXMODE(A3),A3
BRA GETMODE ;GET TXMODE
XTXSIZE LEA TXSIZE(A3),A3
BRA GET2 ;GET TXSIZE
XSPXTRA LEA SPEXTRA(A3),A3
BRA GET4 ;GET fixed point SPACE EXTRA
XPNSIZE JSR GETLONG ;GET PNSIZE
IF noROM THEN
MOVE.L D0,PNSIZE(A3) ;INSTALL INTO THEPORT
PEA PNSIZE(A3)
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA FROMRECT(A2)
PEA TORECT(A2)
_SCALEPT ;SCALE PNSIZE
BRA DONE
ELSE
JMP DPEntry+$272 ;Jump into ROM
ENDIF
TXRATIO MOVE.L PLAYSTATE(A6),A3 ;POINT TO PLAYSTATE RECORD
JSR GETLONG ;GET TEXT NUMER
MOVE.L D0,NUMER(A3) ;INSTALL INTO PLAYSTATE
JSR GETLONG ;GET TEXT DENOM
IF onMacPP THEN
JMP $00418506 ; Jump into ROM
ELSE
MOVE.L D0,DENOM(A3) ;INSTALL INTO PLAYSTATE
PEA NUMER(A3) ; map the ratio
PEA DENOM(A3) ; to have common denominator
PEA FROMRECT(A3) ; with source rect
JSR MAPRATIO ; scale the ratio
PEA NUMER(A3)
PEA FROMRECT(A3)
PEA TORECT(A3)
_SCALEPT ;SCALE NUMER
BRA DONE
ENDIF
VERSION JSR GETUBYTE ;GET VERSION NUMBER BYTE
MOVE.L PLAYSTATE(A6),A3 ;POINT TO PLAYSTATE RECORD
MOVE D0,PLAYVERSION(A3) ;INSTALL VERSION INTO PLAYSTATE
BRA DONE ;AND RETURN
XPNMODE LEA PNMODE(A3),A3
BRA GETMODE ;GET PNMODE
XPNPAT LEA PNPAT(A3),A3
BRA GET8 ;GET PNPAT
XFILLPAT LEA FILLPAT(A3),A3
BRA GET8 ;GET FILLPAT
XOVSIZE JSR GETLONG ;GET OVAL SIZE
IF noROM THEN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L D0,OVALSIZE(A2)
PEA OVALSIZE(A2)
PEA FROMRECT(A2)
PEA TORECT(A2)
_SCALEPT ;SCALE OVAL SIZE
BRA DONE
ELSE
JMP GetVers+$24 ; Jump into ROM
ENDIF
;-----------------------------------------------------
;
; CHANGE ORIGIN: ADD DH AND DV TO FROMRECT, ADJUST PATALIGN,
; THEN RE-MAP THECLIP
;
XORIGIN JSR GETLONG ;GET DH,DV
IF noROM THEN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
ADD D0,FROMRECT+TOP(A2) ;ADD DV TO FROMRECT
ADD D0,FROMRECT+BOTTOM(A2)
ADD D0,PATALIGN+V(A4) ;AND TO PATALIGN
SWAP D0 ;GET DH IN LO WORD
ADD D0,FROMRECT+LEFT(A2) ;ADD DH TO FROMRECT
ADD D0,FROMRECT+RIGHT(A2)
ADD D0,PATALIGN+H(A4) ;AND TO PATALIGN
;
; RE-COMPUTE MAPPED CLIPRGN FROM UNMAPPED THECLIP
;
MOVE.L THECLIP(A2),-(SP) ;PUSH THECLIP
CLR.L -(SP) ;ROOM FOR FCN RESULT
_NEWRGN ;ALLOCATE A TEMP RGN
MOVE.L (SP),HANDLE1(A6) ;PUT IN HANDLE1
BRA.S XCLIP2 ;COPY, MAP, SECT, AND DISCARD
ELSE
JMP GetVers+$44 ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; NEW CQD OPCODES THAT JUST SET PARAMETERS
XRGBFGCOL
LEA FGCOLOR(A3),A3 ;POINT AT SLOT
BRA.S XRGBCOMMON ;COMMON CODE
XRGBBKCOL
LEA BKCOLOR(A3),A3 ;POINT AT SLOT
XRGBCOMMON
JSR GETLONG ;GET R,G
MOVE.L D0,D6 ;SAVE R,G
JSR GETWORD ;GET B
MOVE D0,-(SP) ;PUT B ON STACK
MOVE.L D6,-(SP) ;PUT R,G ON STACK
MOVE.L SP,A1 ;POINT TO RGB
BSR RGB2OLD ;CONVERT TO OLD
MOVE.L D0,(A3) ;SET IT
ADDQ #6,SP ;STRIP RGB
BRA DONE ;AND RETURN
XBkPixPat PEA BKPAT(A3) ;PUSH BKPAT PTR
BRA.S XPIXPAT ;=>USE COMMON CODE
XPnPixPat PEA PNPAT(A3) ;PUSH PNPAT PTR
BRA.S XPIXPAT ;=>USE COMMON CODE
XFillPixPat PEA FILLPAT(A3) ;PUSH FILLPAT PTR
XPixPat JSR GetPicPixPat ;GET THE PATTERN
BRA DONE ;=>AND RETURN
XPnLocHFrac JSR GetWord ;GET FRACTION INTO D0
; MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
; MOVE D0,TXHFRAC(A2) ;SAVE HORIZONTAL FRACTION
BRA DONE ;=>AND RETURN
XCHEXTRA
JSR GetWord ;Get Junk word
BRA DONE ;=>AND RETURN
XHiliteMode ;BCLR #hiliteBit,HiliteMode ;ENABLE HILITING
BRA DONE ;AND RETURN
; HILITE COLOR CHANGED, SAVE NEW VALUE INTO GRAFVARS
XHiliteColor JSR GETLONG ;GET R,G
MOVE.L D0,D6 ;SAVE R,G
JSR GETWORD ;GET B
; DO NOTHING, OLD GRAFPORT
@DONE BRA DONE ;AND RETURN
; HILITE COLOR CHANGED TO DEFAULT, COPY HILITE FROM LOW-MEM TO GRAFVARS
XDefHilite BRA DONE ;AND RETURN
; OP COLOR CHANGED, SAVE NEW VALUE INTO GRAFVARS
XOpColor JSR GETLONG ;GET R,G
MOVE.L D0,D6 ;SAVE R,G
JSR GETWORD ;GET B
; OLD GRAFPORT, DO NOTHING
@DONE BRA DONE ;AND RETURN
;---------------------------------------------------
;
; ROUTINES FOR IGNORING DATA
;
; READ THE LENGTH FOLLOWED BY THAT NUMBER OF BYTES
;
CHKSAME TST.B SAMEFLAG(A6) ;USE SAME STRUCTURE?
BEQ.S IGCOUNT ;=>NO, USE COUNT IN D0
MOVE.L D1,D0 ;ELSE GET SIZE FOR SAME
BRA.S IGCOUNT ;=>IGNORE SPECIFIED NUMBER OF BYTES
IGNORELONG JSR GETLONG ;GET A LONG OF LENGTH
BRA.S IGCOUNT ;AND IGNORE THAT MUCH DATA
IGNORESHORT JSR GETWORD ;GET A WORD OF LENGTH
SWAP D0 ;GET HIGH WORD
CLR D0 ;CLEAR IT OUT
SWAP D0 ;SO WE HAVE A LONG LENGTH
IGCOUNT JSR SkipPicData ;Skip D0 bytes
BRA DONE
;---------------------------------------------------
;
; DRAWING OPCODES: $20 - $FE
;
;---------------------------------------------------
;
; TEXT OR LINE OPCODES:
;
; LINE: 20, PNLOC(pt), NEWPT(pt)
; LINEFROM: 21, NEWPT(pt)
; SHORT LINE: 22, PNLOC(pt), DH(byte), DV(byte)
; SHORTLNFROM: 23, DH(byte), DV(byte)
;
; TEXT: 28,29,2A,2B
;
TXLNOP CMP #3,D7 ;IS OPCODE VALID?
BGT.S IGNORESHORT ;=>NO, IGNORE SHORT DATA
TST.B SAMEFLAG(A6) ;IS THIS A TEXT OPCODE ?
BNE.S TEXTOP ;YES, DO IT
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L PENLOC(A2),D0 ;NO, GET PREVIOUS LINE ENDPOINT
ROR #1,D7 ;IS LO NIBBLE ODD ? (BIT 0)
BCS.S LNFROM ;YES, DRAW LINE FROM PREV
JSR GETLONG ;NO, GET NEW STARTPT
LNFROM MOVE.L D0,PNLOC(A3) ;COPY STARTPT INTO THEPORT
MOVE.L D0,NEWPT(A6) ;SAVE FOR SHORT DH,DV BELOW
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA PNLOC(A3)
PEA FROMRECT(A2)
PEA TORECT(A2)
_MAPPT ;MAP STARTPT
ROR #1,D7 ;IS OPCODE BIT 1 SET ?
BCS.S SHORTLN ;YES, USE SHORT DH,DV FORM
JSR GETLONG ;NO, GET NEWPT
MOVE.L D0,NEWPT(A6) ;PUT IN TEMP
BRA.S LNOK ;AND CONTINUE
SHORTLN BSR GETSBYTE ;GET A SIGNED BYTE
ADD.W D0,NEWPT+H(A6) ;ADD TO STARTPT.H
BSR GETSBYTE ;GET A SIGNED BYTE
ADD.W D0,NEWPT+V(A6) ;ADD TO STARTPT.V
IF noROM THEN
LNOK MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L NEWPT(A6),PENLOC(A2) ;REMEMBER NEWPT FOR NEXT TIME
; MOVE #$8000,TXHFRAC(A2) ;INVALIDATE TEXT FRACTION
PEA NEWPT(A6) ;PUSH ADDRESS OF NEWPT
PEA FROMRECT(A2)
PEA TORECT(A2)
_MAPPT ;MAP NEWPT
MOVE.L NEWPT(A6),-(SP) ;PUSH NEWPT PARAM FOR LINEPROC
MOVE.L PStdLine,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L LINEPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
LNOK JMP GetVers+$C6 ;Jump into ROM
ENDIF
;---------------------------------------------------
;
; LONG TEXT: 28, txLoc(pt), count(0..255), text
; DH TEXT: 29, dh(0..255), count(0..255), text
; DV TEXT: 2A, dv(0..255), count(0..255), text
; DHDV TEXT: 2B: dh(0..255), dv(0,..255), count(0..255), text
;
TEXTOP
; MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
; MOVE NEWHFRAC(A2),TXHFRAC(A2) ;ELSE COPY NEW FRACTIONAL POSITION
; MOVE #$8000,NEWHFRAC(A2) ;AND CLEAR TO 1/2
AND #3,D7 ;IS THIS A LONGTEXT OPCODE ?
BEQ.S LONGTXT ;YES, USE LONG FORMAT
ROR #1,D7 ;DO WE NEED DH ? (BIT 0)
BCC.S DHOK ;NO, CONTINUE
JSR GETUBYTE ;GET DH 0..255
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
ADD D0,TEXTLOC+H(A2) ;BUMP TEXTLOC.H
DHOK ROR #1,D7 ;DO WE NEED DV ? (BIT 1)
BCC.S TEXTOP2 ;NO, CONTINUE
JSR GETUBYTE ;GET DV 0..255
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
ADD D0,TEXTLOC+V(A2) ;BUMP TEXTLOC.V
BRA.S TEXTOP2 ;SHARE CODE
LONGTXT JSR GETLONG ;GET TXLOC, UNMAPPED
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L D0,TEXTLOC(A2) ;SAVE IN TEXTLOC
TEXTOP2 JSR GETUBYTE ;GET TEXT LENGTH 0..255
MOVE D0,D6 ;SAVE LENGTH IN D6
PEA TXDATA(A6) ;PUSH ADDR OF TEXT BUF
MOVE D6,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET THE TEXT
IF noROM THEN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L TEXTLOC(A2),PNLOC(A3) ;COPY TEXTLOC INTO PNLOC
PEA PNLOC(A3)
PEA FROMRECT(A2)
PEA TORECT(A2)
_MAPPT ;MAP PNLOC.V,PNLOC.H
MOVE D6,-(SP) ;PUSH CHARACTER COUNT
PEA TXDATA(A6) ;PUSH ADDRESS OF TEXT
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L NUMER(A2),-(SP) ;PUSH NUMER
MOVE.L DENOM(A2),-(SP) ;PUSH DENOM
MOVE.L PStdText,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L TEXTPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$13C ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; Rect: OP, RECT
;
RECTOP CMP #4,D7 ;IS OPCODE VALID?
BLE.S ROK ;=>YES, CONTINUE
MOVEQ #8,D0 ;IF RECT, SKIP 8 BYTES
MOVEQ #0,D1 ;IF SAME, SKIP 0 BYTES
BRA CHKSAME ;=>CHECK SAMEFLAG AND IGNORE
ROK MOVE.B D7,-(SP) ;PUSH VERB
BSR GETRECT ;GET AND PUSH DSTRECT
IF noROM THEN
MOVE.L PStdRect,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L RECTPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$180 ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; RRect: OP, RECT, OVALPT
;
RRECTOP CMP #4,D7 ;IS OPCODE VALID?
BLE.S RROK ;=>YES, CONTINUE
MOVEQ #8,D0 ;IF RECT, SKIP 8 BYTES
MOVEQ #0,D1 ;IF SAME, SKIP 0 BYTES
BRA CHKSAME ;=>CHECK SAMEFLAG AND IGNORE
RROK MOVE.B D7,-(SP) ;PUSH VERB
BSR GETRECT ;GET AND PUSH DSTRECT
IF noROM THEN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L OVALSIZE(A2),-(SP) ;PUSH OVHT,OVWD
MOVE.L PStdRRect,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L RRECTPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$19A ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; Oval: OP, RECT
;
OVALOP CMP #4,D7 ;IS OPCODE VALID?
BLE.S OVOK ;=>YES, CONTINUE
MOVEQ #8,D0 ;IF RECT, SKIP 8 BYTES
MOVEQ #0,D1 ;IF SAME, SKIP 0 BYTES
BRA CHKSAME ;=>CHECK SAMEFLAG AND IGNORE
OVOK MOVE.B D7,-(SP) ;PUSH VERB
BSR GETRECT ;GET AND PUSH DSTRECT
IF noROM THEN
MOVE.L PStdOval,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L OVALPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$1BC ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; Arc: OP, RECT, STARTANGLE, ARCANGLE
;
ARCOP CMP #4,D7 ;IS OPCODE VALID?
BLE.S ARCOK ;=>YES, CONTINUE
MOVEQ #12,D0 ;IF NOT SAME, SKIP 12 BYTES
MOVEQ #4,D1 ;IF SAME, SKIP 5 BYTES
BRA CHKSAME ;=>CHECK SAMEFLAG AND IGNORE
ARCOK MOVE.B D7,-(SP) ;PUSH VERB
BSR GETRECT ;GET AND PUSH DSTRECT
JSR GETWORD ;GET STARTANGLE
MOVE D0,-(SP) ;PUSH STARTANGLE
JSR GETWORD ;GET ARCANGLE
IF noROM THEN
MOVE D0,-(SP) ;PUSH ARCANGLE
MOVE.L PStdArc,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L ARCPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$1E0 ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; Poly: OP, POLY
;
; THE SAME POLY OPCODES WERE NEVER PARSED, SO FOR COMPATIBILITY I'LL DO OLD WAY
POLYOP CMP #4,D7 ;IS OPCODE VALID?
BLE.S POLYOK ;=>YES, CONTINUE
TST.B SAMEFLAG(A6) ;IS IT THE SAME POLY?
BNE.S @DONE ;=>YES, NO DATA
BSR GETHNDL ;ELSE READ IN THE POLYGON
@DONE BRA DONE ;AND RETURN
POLYOK BSR GETHNDL ;COPY POLY INTO HANDLE1
IF noROM THEN
MOVE.L HANDLE1(A6),-(SP) ;PUSH POLYHANDLE
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA FROMRECT(A2) ;PUSH FROMRECT
PEA TORECT(A2) ;PUSH TORECT
_MAPPOLY ;MAP POLY INTO DST COORDS
MOVE.B D7,-(SP) ;PUSH VERB
MOVE.L HANDLE1(A6),-(SP) ;PUSH POLYHANDLE
MOVE.L PStdPoly,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L POLYPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL1 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$1FA ; Jump into ROM
ENDIF
;---------------------------------------------------
;
; Rgn: OP, RGN
;
RGNOP CMP #4,D7 ;IS OPCODE VALID?
BLE.S RGNOK ;=>YES, CONTINUE
TST.B SAMEFLAG(A6) ;IS IT THE SAME RGN?
BNE.S @DONE ;=>YES, NO DATA
BSR GETHNDL ;ELSE READ IN THE RGN
@DONE BRA DONE ;AND RETURN
RGNOK BSR GETHNDL ;COPY RGN INTO HANDLE1
IF noROM THEN
MOVE.L HANDLE1(A6),-(SP) ;PUSH RGN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA FROMRECT(A2) ;PUSH FROMRECT
PEA TORECT(A2) ;PUSH TORECT
_MAPRGN ;MAP RGN INTO DSTRECT COORDS
MOVE.B D7,-(SP) ;PUSH VERB
MOVE.L HANDLE1(A6),-(SP) ;PUSH RGN
MOVE.L PStdRgn,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L RGNPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL1 ;CALL PROC, DISCARD AND QUIT
ELSE
JMP GetVers+$22C ; Jump into ROM
ENDIF
;--------------------------------------------------------------------------
;
; Quantities in brackets only read if high bit of rowbytes is set.
;
; BitsRect: 90, ROWBYTES, BOUNDS, [REST OF PIXMAP, COLORTABLE],
; SRCRECT, DSTRECT, MODE, BYTECOUNT, BITDATA
;
; BitsRgn: 91, ROWBYTES, BOUNDS, [REST OF PIXMAP, COLORTABLE],
; SRCRECT, DSTRECT, MODE, MASKRGN, BYTECOUNT, BITDATA
;
; PackBitsRect:98, ROWBYTES, BOUNDS, [REST OF PIXMAP, COLORTABLE],
; SRCRECT, DSTRECT, MODE, BYTECOUNT, BITDATA
;
; PackBitsRgn: 99, ROWBYTES, BOUNDS, [REST OF PIXMAP, COLORTABLE],
; SRCRECT, DSTRECT, MODE, MASKRGN, BYTECOUNT, BITDATA
;
; FIRST GET THE BITMAP/PIXMAP FROM THE PICTURE
BITSOP CMP #1,D7 ;CHECK OPCODE
BGT IGNORESHORT ;=>READ WORD LENGTH + DATA
JSR GETWORD ;GET ROWBYTES FROM PICTURE
MOVE D0,SRCPIX+ROWBYTES(A6) ;SAVE ROWBYTES
MOVEQ #BITMAPREC-6,D1 ;GET SIZE OF BITMAP
MOVE D0,D6 ;IS IT A BITMAP OR A PIXMAP?
BPL.S BITSOP1 ;=>IT'S A BITMAP
MOVEQ #PMREC-6,D1 ;GET SIZE OF PIXMAP
BITSOP1 PEA SRCPIX+BOUNDS(A6) ;PUSH ADDR OF SRCPIX.BOUNDS
MOVE D1,-(SP) ;PUSH BYTECOUNT
JSR GETPICDATA ;GET BITMAP/PIXMAP
; IF IT'S A PIXMAP, THEN ALLOCATE A COLOR TABLE AND GET IT FROM THE PICTURE
TST D6 ;IS IT A PIXMAP?
BPL.S BITSOP2 ;=>NO, DON'T GET TABLE
MOVEQ #CTREC,D0 ;GET SIZE OF COLOR TABLE
_NEWHANDLE ;GET A HANDLE FOR IT
BNE ABORT ;ABORT IF NO ROOM
MOVE.L A0,SRCPIX+PMTABLE(A6) ;SAVE COLOR TABLE HANDLE
MOVE.L A0,-(SP) ;PUSH COLOR TABLE HANDLE
MOVE.L A0,-(SP) ;AND AGAIN
JSR GETPICTABLE ;READ COLOR TABLE INTO HANDLE
; ??? ERROR HANDLING ???
MOVE.W SRCPIX+PIXELSIZE(A6),-(SP) ;Push pixel size <27Feb87 DBG>
JSR CTBitMap ;COMPUTE TRANSLATION TABLE
BITSOP2 PEA SRCRECT(A6) ;PUSH ADDR OF SRCRECT
MOVE #16,-(SP) ;PUSH BYTECOUNT = 16
JSR GetPicData ;GET SRCRECT,DSTRECT
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA DSTRECT(A6)
PEA FROMRECT(A2)
PEA TORECT(A2)
_MAPRECT ;MAP DSTRECT
PEA SRCPIX(A6) ;PUSH SRCPIX
PEA SRCRECT(A6) ;PUSH ADDR OF SRCRECT
PEA DSTRECT(A6) ;PUSH ADDR OF DSTRECT
JSR GETWORD ;GET MODE
JSR MAPMODE ;MAP TO EQUIVALENT MODE
MOVE D0,-(SP) ;PUSH MODE
CLR.L -(SP) ;ASSUME MASKRGN = NIL
TST D7 ;IS MASKRGN USED ?
BEQ.S NOTRGN ;=> YES, USE NIL RGN
USERGN BSR GETHNDL ;GET MASKRGN INTO HANDLE1
MOVE.L HANDLE1(A6),-(SP) ;PUSH MASKRGN
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA FROMRECT(A2) ;PUSH FROMRECT
PEA TORECT(A2) ;PUSH TORECT
_MAPRGN ;MAP RGN INTO DSTRECT COORDS
MOVE.L HANDLE1(A6),(SP) ;PASS MASKRGN
MOVE.L HANDLE1(A6),HANDLE2(A6) ;AND REMEMBER MASKRGN IN HANDLE2
NOTRGN MOVE SRCPIX+BOUNDS+BOTTOM(A6),D6 ;GET SRCPIX.BOTTOM
SUB SRCPIX+BOUNDS+TOP(A6),D6 ;CALC HEIGHT
MOVE D6,D5 ;COPY HEIGHT
MOVEQ #0,D0 ;CLEAR HIGH WORD
MOVE SRCPIX+ROWBYTES(A6),D0 ;GET BITMAP/PIXMAP ROWBYTES
BPL.S @NOTPIX ;SKIP IF NOT PIXMAP
AND #rbMask,D0 ;CLEAR FLAG BITS
MOVE SRCPIX+PIXELSIZE(A6),D1 ;GET PIXEL SIZE
ADD D1,D0 ;ROUND UP TO NEAREST BYTE
SUBQ #1,D0 ;(MINUS ONE FOR ROUNDING)
DIVU D1,D0 ;GET 1-BIT ROWBYTES
ADDQ #1,D0 ;MAKE SURE ROWBYTES...
BCLR #0,D0 ;...IS EVEN
@NOTPIX
MOVE D0,SRCBITS+ROWBYTES(A6) ;COPY INTO SRCBITS
MULU D0,D5 ;CALC BITMAP SIZE
MOVE.L D5,D0 ;GET BYTECOUNT
_NewHandle ;ALLOCATE BITS HANDLE
BEQ.S MEMOK ;CONTINUE IF NOT MEMFULL
MOVE.L (SP)+,A0 ;POP MASKRGN (MAYBE NIL)
_DisposHandle ;DISCARD IT
TST SRCPIX+ROWBYTES(A6) ;PIXMAP OR BITMAP <30Mar87 DBG>
BPL.S @NOTPIX2 ;BITMAP-NO CTAB <30Mar87 DBG>
MOVE.L SRCPIX+PMTABLE(A6),A0 ;GET COLOR TABLE
_DisposHandle ;DISCARD IT
@NOTPIX2 ; <30Mar87 DBG>
BRA ABORT ;AND ABORT
MEMOK _HLock ;LOCK HANDLE1
MOVE.L A0,HANDLE1(A6) ;REMEMBER IN HANDLE1
PEA SRCPIX(A6) ;PUSH PIXMAP
PEA TXDATA(A6) ;PUSH XLATE TABLE <19Feb87 DBG>
MOVE.L A0,-(SP) ;PUSH HANDLE
MOVE SRCBITS+ROWBYTES(A6),-(SP) ;PUSH TARGET ROWBYTES
JSR GETPM1Deep ;AND READ IN PIXMAP DATA
;
; OK, now it's time to build a bit map which looks like the pixmap. Use
; SRCBITS if it's really a PIXMAP (otherwise just use SRCPIX, since it's
; already set up).
;
DOBITS
MOVE.L HANDLE1(A6),A0 ;GET HANDLE1
MOVE.L (A0),SRCPIX+BASEADDR(A6) ;FILL IN BASEADDR
MOVE SRCPIX+ROWBYTES(A6),D0 ;GET ROWBYTES
BPL.S REALDO ;OLD BITMAP=>GO FOR IT!
LEA SRCBITS(A6),A1 ;Point at SRCBITS
MOVE.L A1,(4+2+4+4)(SP) ;Smash source bmap parameter
MOVE.L (A0),(A1)+ ;FILL IN BASEADDR
ADDQ #2,A1 ;Skip ROWBYTES (done above)
LEA SRCPIX+BOUNDS(A6),A0 ;GET BOUNDS
MOVE.L (A0)+,(A1)+ ;COPY FIRST LONG
MOVE.L (A0),(A1) ;...AND SECOND
REALDO
MOVE.L PStdBits,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S BITSOK ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L BITSPROC(A0),A0 ;NO, GET PROCPTR
BITSOK JSR (A0) ;CALL BITSPROC
MOVE.L HANDLE1(A6),A0 ;GET HANDLE1
_HUnlock ;UNLOCK THE DATABITS
TST SRCPIX+ROWBYTES(A6) ;IS IT A PIXMAP?
BPL.S DOKILL ;=>NO, DON'T DISPOSE COLOR TABLE
MOVE.L SRCPIX+PMTABLE(A6),A0 ;ELSE GET COLOR TABLE HANDLE
_DISPOSHANDLE ;AND DISPOSE OF IT
IF noROM THEN
DOKILL TST D7 ;IS MASKRGN USED ?
BEQ KILL1 ;NO, DISCARD ONLY DATABITS
BRA KILL2 ;DISCARD MASKRGN & DATABITS
ELSE
DOKILL JMP GetVers+$326 ; Jump into ROM
ENDIF
;--------------------------------------------------------------------------
;
; CTBitMap - Build bit map of black/white color mappings from a CTAB
; PROCEDURE CTBitMap(theTable: CTabHandle; pixSize: INTEGER); <27Feb87 DBG>
;
CTBitMap
;
; Build a vector of bytes which indicates, for each of the colors in
; the pixmap's color table, whether that color should map to black or white.
;
MOVE.L 6(SP),A0 ;Table handle <27Feb87 DBG>
MOVE.L (A0),A0 ;Table pointer
ADDQ #CTSize,A0 ;POINT AT SIZE
MOVE (A0)+,D4 ;GET SIZE(-1); POINT AT TABLE
;
; First, clear the entire mapping table to $80 so we can recognize pixel
; values which didn't get set by the color table.
;
LEA TXDATA(A6),A1 ;Place to stick table <19Feb87 DBG>
MOVE.W #256-1,D0 ;Count of bytes <27Feb87 DBG>
MOVE.B #$80,D2 ; Marker <27Feb87 DBG>
@CLRLOOP ; <27Feb87 DBG>
MOVE.B D2,(A1)+ ;Clear entry to $80 <27Feb87 DBG>
DBRA D0,@CLRLOOP ; <27Feb87 DBG>
;
; Now, set the corresponding bit value for every entry in the color table.
;
LEA TXDATA(A6),A1 ;Get address again <27Feb87 DBG>
@CTLOOP
MOVE (A0)+,D2 ;Get pixel value <19Feb87 DBG>
BSR RGB2Pixel ;GET BIT VALUE IN D0.B
MOVE.B D0,0(A1,D2.W) ;WRITE OUT THIS BYTE <19Feb87 DBG>
DBRA D4,@CTLOOP ;LOOP THROUGH COLOR TABLE
;
; Next, we must set a value for every pixel which isn't in the color table.
; Of all the undefined entries, the first half map to zero and the second
; to one (this approximates the ramp used by Color QuickDraw).
;
MOVE 4(SP),D0 ; Get pixel size <27Feb87 DBG>
MOVEQ #1,D1 ; Handy 1 bit <27Feb87 DBG>
ASL D0,D1 ; Compute #pixel values <27Feb87 DBG>
MOVE.L 6(SP),A0 ;Table handle <27Feb87 DBG>
MOVE.L (A0),A0 ;Table pointer <27Feb87 DBG>
ADDQ #CTSize,A0 ;POINT AT SIZE <27Feb87 DBG>
MOVE (A0),D4 ;GET SIZE(-1) <27Feb87 DBG>
SUB D4,D1 ;Calculate number of...<27Feb87 DBG>
SUBQ #1,D1 ;...undefined entries <27Feb87 DBG>
MOVE D1,D4 ;Make copy <27Feb87 DBG>
ASR #1,D4 ;Divide by 2 <27Feb87 DBG>
SUB D4,D1 ;Other half <27Feb87 DBG>
;
; Set all the pixels we want to set to zero, to zero.
;
@ZeroLoop ; <27Feb87 DBG>
TST D4 ;Any left? <27Feb87 DBG>
BEQ.S @OneLoop ;Nope, do the ones <27Feb87 DBG>
@ZeroLoop2 ; <27Feb87 DBG>
TST.B (A1)+ ;Valid pixel? <27Feb87 DBG>
BPL.S @ZeroLoop2 ;Yup, do next <27Feb87 DBG>
CLR.B -1(A1) ;No, set to zero <27Feb87 DBG>
SUBQ #1,D4 ;One less to set <27Feb87 DBG>
BRA.S @ZeroLoop ;Look for next guy <27Feb87 DBG>
;
; Now set all the one pixels to one.
;
@OneLoop ; <27Feb87 DBG>
MOVEQ #1,D0 ; Get a one <27Feb87 DBG>
@OneLoop1 ; <27Feb87 DBG>
TST D1 ;Any left? <27Feb87 DBG>
BEQ.S @UndefDone ;Nope, do the ones <27Feb87 DBG>
@OneLoop2 ; <27Feb87 DBG>
TST.B (A1)+ ;Valid pixel? <27Feb87 DBG>
BPL.S @OneLoop2 ;Yup, do next <27Feb87 DBG>
MOVE.B D0,-1(A1) ;No, set to one <27Feb87 DBG>
SUBQ #1,D1 ;One less to set <27Feb87 DBG>
BRA.S @OneLoop1 ;Look for next guy <27Feb87 DBG>
@UndefDone ; <27Feb87 DBG>
;
; Return to the caller.
;
MOVE.L (SP)+,A0 ;GET RETURN ADDRESS <27Feb87 DBG>
ADD #6,SP ;POP ARGUMENTS <27Feb87 DBG>
JMP (A0) ;RETURN <27Feb87 DBG>
;--------------------------------------------------------------------------
;
; CommentOp: OP, KIND, { SIZE, DATA }
;
COMMOP TST.B SAMEFLAG(A6) ;IS SAMEFLAG SET?
BNE IGNORESHORT ;=>YES, READ WORD LENGTH + DATA
CMP #1,D7 ;$A0 OR $A1?
BGT IGNORESHORT ;=>READ WORD LENGTH + DATA
JSR GETWORD ;GET COMMENT KIND IN D0
MOVE D0,-(SP) ;PUSH FOR COMMENTPROC
TST.B D7 ;IS THIS SHORT FORM ?
BNE.S LONGCOM ;NO, GET MORE
IF noROM THEN
CLR -(SP) ;YES, PUSH DATASIZE = 0
CLR.L -(SP) ;PUSH DATAHANDLE = NIL
MOVE.L PStdComment,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L COMMENTPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL0 ;CALL PROC AND QUIT
ELSE
JMP GetVers+$33A ; Jump into ROM
ENDIF
LONGCOM JSR GETWORD ;GET DATASIZE
MOVE D0,-(SP) ;PUSH DATASIZE
CLR D4 ;INIT BYTE INDEX FOR GETHND2
BSR.S GETHND2 ;GET DATA INTO HANDLE1
IF noROM THEN
MOVE.L HANDLE1(A6),-(SP) ;PUSH DATA HANDLE
MOVE.L PStdComment,A0 ;get piece of trap table
MOVE.L GRAFPROCS(A3),D0 ;IS GRAFPROCS NIL ?
BEQ.S @1 ;YES, USE STD PROC
MOVE.L D0,A0
MOVE.L COMMENTPROC(A0),A0 ;NO, GET PROCPTR
@1 BRA CALL1 ;CALL PROC, DISCARD AND QUIT
ELSE
JMP GetVers+$35E ; Jump into ROM
ENDIF
;-----------------------------------------------------
;
; GET SOME BYTES AND QUIT
;
GETDONE MOVE.L A3,-(SP) ;PUSH DATAPTR
MOVE D6,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
BRA DONE
GETSBYTE
;------------------------------------------------------
;
; LOCAL PROCEDURE TO GET A SIGNED BYTE INTO D0 FROM PICTURE
;
CLR.B -(SP) ;ALLOCATE TEMP
MOVE.L SP,-(SP) ;PUSH ADDR OF TEMP
MOVE #1,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
MOVE.B (SP)+,D0 ;POP RESULT
EXT.W D0 ;SIGN EXTEND TO WORD
RTS
GETRECT
;----------------------------------------------------------
;
; LOCAL PROCEDURE TO SET UP AND PUSH DSTRECT AS FOLLOWS:
; IF NOT SAMEFLAG, THEN GET NEXT 8 BYTES INTO THERECT.
; THEN MAP THERECT INTO DSTRECT, AND PUSH ADDR OF DSTRECT.
; CLOBBERS A0,D0
;
TST.B SAMEFLAG(A6) ;SAME RECT ?
BNE.S SAME1 ;YES, CONTINUE
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
PEA THERECT(A2) ;PUSH ADDR OF THERECT
MOVE #8,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
IF noROM THEN
SAME1 MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
MOVE.L THERECT(A2),DSTRECT(A6) ;COPY THERECT INTO DSTRECT
MOVE.L THERECT+4(A2),DSTRECT+4(A6)
PEA DSTRECT(A6)
PEA FROMRECT(A2)
PEA TORECT(A2)
_MAPRECT ;MAP DSTRECT
MOVE.L (SP)+,A0 ;POP RETURN ADDR
PEA DSTRECT(A6) ;PUSH ADDR OF MAPPED DSTRECT
JMP (A0) ;RETURN
ELSE
SAME1 JMP GetVers+$458
ENDIF
GetPicOp
;------------------------------------------------------
;
; LOCAL PROCEDURE TO GET NEXT OPCODE FROM PICTURE INTO D0
;
MOVE.L PLAYSTATE(A6),A2 ;POINT TO PLAYSTATE RECORD
CMP #PICTVERSION,PLAYVERSION(A2) ;IS IT AN OLD PICTURE?
BEQ.S OLDPIC ;=>YES, GET ONE-BYTE OPCODE
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS
MOVE.L PLAYINDEX(A0),D0 ;GET CURRENT POSITION
BTST #0,D0 ;IS IT ODD?
BEQ.S NOTODD ;=>NO, JUST FETCH OPCODE
JSR GETUBYTE ;ELSE SKIP PAD BYTE
NOTODD JSR GETWORD ;GET OPCODE WORD IN D0
RTS ;AND RETURN
OLDPIC JSR GETUBYTE ;GET OPCODE BYTE IN D0
RTS ;AND RETURN
GETHNDL
;--------------------------------------------------------
;
; LOCAL ROUTINE TO ALLOCATE, AND COPY HANDLE1
;
; CLOBBERS D0-D2,A0-A1,D4,D5
;
; TRICKY ENTRY AT GETHND2 WITH COUNT IN D0, D4 = 0
;
MOVEQ #2,D4 ;INIT BYTE OFFSET FOR LATER
JSR GETWORD ;GET BYTECOUNT
GETHND2 EXT.L D0 ;MAKE COUNT LONG
MOVE.L D0,D5 ;PUT BYTECOUNT INTO D5
_NewHandle ;ALLOCATE HANDLE
BNE.S ABORT ;ABORT IF MEMFULL
MOVE.L A0,HANDLE1(A6) ;SAVE IN HANDLE1
_HLock ;LOCK HANDLE1
MOVE.L (A0),A0 ;DE-REFERENCE IT
MOVE D5,(A0) ;INSTALL SIZE WORD
SUB D4,D5 ;ADJUST COUNT
PEA 0(A0,D4) ;PUSH DATAPTR
MOVE D5,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
IF onMac THEN
MOVE.L HANDLE1(A6),A0 ;GET HANDLE 1
_HUnLock ;UNLOCK IT
RTS ;AND RETURN
ELSE
JMP GetVers+$4A6 ;Jump into ROM (Maui only)
ENDIF
;-----------------------------------------------------------------
;
; CALL BOTTLENECK PROC, DISPOSE OF ONE OR TWO HANDLES, AND QUIT
;
CALL0 JSR (A0) ;CALL PROC PTR
BRA.S DONE ;AND QUIT
CALL1 JSR (A0) ;CALL PROC PTR
BRA.S KILL1 ;KILL HANDLE1 AND QUIT
; KILL ONE OR TWO HANDLE TEMPS
KILL2 MOVE.L HANDLE2(A6),A0 ;GET HANDLE2
_DisposHandle ;DISCARD IT
IF noROM THEN
KILL1 MOVE.L HANDLE1(A6),A0 ;GET HANDLE1
_DisposHandle ;DISCARD IT
BRA.S DONE
ABORT MOVE.L SAVESP(A6),SP ;RESTORE STACK
CLR.B RESULT(A6) ;RETURN FALSE
DONE MOVEM.L (SP)+,D3-D7/A2-A4 ;RESTORE REGISTERS
PUNLINK PARAMSIZE,'PICITEM1'
ELSE
KILL1 JMP GetVers+$4BC ; Jump into ROM
ABORT JMP GetVers+$4C4 ; Jump into ROM
DONE JMP GetVers+$4CC ; Jump into ROM
ENDIF
GETUBYTE FUNC EXPORT
IMPORT GetPicData
;------------------------------------------------------
;
; LOCAL PROCEDURE TO GET AN UNSIGNED BYTE INTO D0 FROM PICTURE
;
CLR.B -(SP) ;ALLOCATE TEMP
MOVE.L SP,-(SP) ;PUSH ADDR OF TEMP
MOVE #1,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
CLR D0 ;GET READY FOR BYTE
MOVE.B (SP)+,D0 ;POP RESULT INTO LO BYTE
RTS
GETWORD FUNC EXPORT
IMPORT GetPicData
;------------------------------------------------------
;
; LOCAL PROCEDURE TO GET A WORD FROM PICTURE INTO D0
;
CLR.W -(SP) ;ALLOCATE TEMP
MOVE.L SP,-(SP) ;PUSH ADDR OF TEMP
MOVE #2,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
MOVE (SP)+,D0 ;RETURN ANSWER IN D0
RTS
GETLONG FUNC EXPORT
IMPORT GetPicData
;----------------------------------------------------------
;
; LOCAL PROCEDURE TO GET A LONG FROM PICTURE INTO D0
;
CLR.L -(SP) ;ALLOCATE TEMP
MOVE.L SP,-(SP) ;PUSH ADDR OF TEMP
MOVE #4,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET DATA FROM THEPIC
MOVE.L (SP)+,D0 ;RETURN ANSWER IN D0
RTS
MAPMODE FUNC EXPORT
;----------------------------------------------------------
;
; LOCAL PROCEDURE TO MAP COLOR QUICKDRAW MODES TO OLD MODES
;
CMP.W #$1F,D0 ;OLD MODE, OR UNKNOWN?
BLS.S DONEMODE ;SKIP OUT
CMP.W #$2F,D0 ;WITHIN CORRECT RANGE?
BLS.S @MAPIT ;SKIP IF SO
CMP.W #$32,D0 ;HILITE?
BEQ.S @MAPIT ;SKIP IF SO
CMP.W #$3A,D0 ;HILITE?
BNE.S DONEMODE ;NO, PASS THROUGH
@MAPIT
AND.W #7,D0 ;EXTRACT LOW 3 BITS
MOVE.B arithMode(D0.W),D0 ;GET EQUIVALENT MODE
DONEMODE
RTS ;QUIT
; [This table extracted from utils.a]
arithMode
; hilite
;avg addPin addOver subPin trans max subOver min
DC.B srcCopy, srcBic, srcXor, srcOr, srcOr, srcBic, srcXor, srcOr
SkipPicData PROC EXPORT
IMPORT GETPICDATA
;----------------------------------------------------------
;
; LOCAL PROCEDURE TO SKIP D0.L BYTES IN THE PICTURE
;
MOVEM.L D6/D7,-(SP) ;SAVE WORK REGISTERS
MOVE.L #256,D6 ;GET USEFUL NUMBER
SUB.L D6,SP ;ALLOCATE STACK BUFFER
MOVE.L D0,D7 ;SAVE WHOLE SIZE
BEQ.S IGDONE ;=>NO DATA, JUST RETURN
NXTCHNK MOVE D6,D0 ;ASSUME SIZE >= 256
CMP.L D6,D7 ;IS SIZE >= 256?
BGE.S IGSIZEOK ;=>YES, SKIP 256 BYTES
MOVE D7,D0 ;ELSE SKIP REMAINING BYTES
IGSIZEOK MOVE.L SP,-(SP) ;PUSH BUFFER POINTER
MOVE D0,-(SP) ;PUSH BYTECOUNT
JSR GETPICDATA ;READ DATA INTO BUFFER
SUB.L D6,D7 ;SUBTRACT BUFSIZE FROM COUNT
BGT.S NXTCHNK ;=>GO SKIP NEXT CHUNK
IGDONE ADD.L D6,SP ;STRIP BUFFER
MOVEM.L (SP)+,D6/D7 ;RESTORE WORK REGISTERS
RTS
GetPicData PROC EXPORT
;------------------------------------------------------------------
;
; PROCEDURE GetPicData(dataPtr: QDPtr; byteCount: INTEGER);
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (GetPicData) (GetPicData)
;
;
MOVE.L 6(SP),-(SP) ;COPY DATAPTR
MOVE.W 8(SP),-(SP) ;COPY BYTECOUNT
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 ?
MOVE.L PStdGetPic,A0 ;get piece of trap table
BEQ.S USESTD ;yes, use std proc
MOVE.L D0,A0
MOVE.L GETPICPROC(A0),A0 ;NO, GET GET PROC PTR
USESTD JSR (A0) ;AND CALL IT
MOVEQ #0,D0 ;CLEAR HIGH WORD
MOVE.W 4(SP),D0 ;GET BYTECOUNT
MOVE.L GRAFGLOBALS(A5),A0 ;POINT TO QUICKDRAW GLOBALS
ADD.L D0,PLAYINDEX(A0) ;BUMP PLAYINDEX
MOVE.L (SP)+,A0 ;RETURN ADDRESS
ADDQ #6,SP ;STRIP PARAMS
JMP (A0) ;RETURN
GetPicTable PROC EXPORT
IMPORT GetPicData,GETLONG
;------------------------------------------------------
;
; PROCEDURE GetPicTable(CTabHandle);
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (GetPicTable) (GetPicTable)
;
;
JSR GETLONG ;GET SEED INTO D0
MOVE.L D0,-(SP) ;SAVE SEED
JSR GETLONG ;GET TRANSINDEX, SIZE INTO D0
MOVE.L D0,-(SP) ;SAVE TRANSINDEX,SIZE
MOVE D0,D2 ;GET SIZE INTO D2
ADDQ #1,D2 ;MAKE IT ONE BASED
MULU #CTENTRYSIZE,D2 ;GET SIZE OF TABLE
MOVE.L D2,D0 ;SAVE SIZE OF TABLE
ADD #CTREC,D0 ;ADD SIZE OF HEADER
MOVE.L 12(SP),A0 ;GET HANDLE
_SETHANDLESIZE ;RESIZE IT
BEQ.S @1 ;Skip if OK
MOVEQ #25, D0 ;Sayonara, sweetheart
_SysError
; ??? Should really be able to do better than this. Maybe if this fails,
; we should do an _EmptyHandle as a signal to the caller that we flopped???
@1
_HLock ;LOCK IT
MOVE.L (A0),A0 ;POINT TO CTAB
MOVE.L (SP)+,D0 ;GET TRANSINDEX,SIZE
MOVE.L (SP)+,(A0)+ ;COPY SEED TO CTAB
MOVE.L D0,(A0)+ ;COPY TRANSINDEX,SIZE
MOVE.L A0,-(SP) ;PUSH DST POINTER
MOVE D2,-(SP) ;PUSH BYTECOUNT
JSR GETPICDATA ;READ DATA FROM PICTURE
MOVE.L 4(SP),A0 ;GET HANDLE
_HUnlock ;UNLOCK IT
MOVE.L (A0),A0 ;point to table <PMA207>
TST transIndex(A0) ;device color table? <PMA207>
BPL.S @done ;=>no, just return <PMA207>
MOVE ctSize(A0),D0 ;get size of table <PMA207>
MOVEQ #0,D1 ;get first pixel value <PMA207>
ADDQ #ctRec,A0 ;point to first entry <PMA207>
@2 MOVE D1,(A0) ;stuff a pixel <PMA207>
ADDQ #ctEntrySize,A0 ;bump to next entry <PMA207>
ADDQ #1,D1 ;bump to next pixel value <PMA207>
DBRA D0,@2 ;repeat for all entries <PMA207>
@done MOVE.L (SP)+,(SP) ;STRIP PARAM
RTS ;AND RETURN
GetPicPixPat PROC EXPORT
IMPORT GetWord,GETPICDATA
IMPORT RGB2Pat,GETLONG,GetUByte
;------------------------------------------------------
;
; PROCEDURE GetPicPixPat(PatPtr);
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (GetPicPixPat) (GetPicPixPat)
;
;
; GET TYPE AND ONE BIT PATTERN FROM THE PICTURE
MOVEQ #10,D0 ;GET NUMBER OF BYTES
SUB D0,SP ;MAKE ROOM FOR TYPE, PATTERN
MOVE.L SP,-(SP) ;PUSH POINTER
MOVE D0,-(SP) ;PUSH BYTE COUNT
JSR GETPICDATA ;READ IN 10 BYTES
MOVE.L 14(SP),A0 ;GET PTR TO PATTERN
MOVE (SP)+,D1 ;GET TYPE
MOVE.L (SP)+,(A0)+ ;SAVE 1ST HALF PATTERN
MOVE.L (SP)+,(A0) ;SAVE 2ND HALF PATTERN
CMP.W #ditherPat,D1 ;IS IT A DITHER PATTERN?
BNE.S @1 ;No, just use pattern data
MOVEQ #6,D0 ;Size of RGB buffer
SUB.L D0,SP ;MAKE ROOM FOR RGB ON STACK
MOVE.L SP,-(SP) ;BUFFER ADDRESS
MOVE D0,-(SP) ;LENGTH
BSR GetPicData ;GET R, G, B
MOVE.L SP,A1 ;Point at RGB
JSR RGB2Pat ;Get pattern
ADDQ #6,SP ;Blow off RGB
MOVE.L 4(SP),A1 ;GET PAT PTR
MOVE.L D0,(A1)+ ;Copy gray pattern
MOVE.L D0,(A1)
BRA.S PATDONE ;No pixmap to skip
@1
; GET PIXMAP FROM THE PICTURE
MOVEQ #PMREC-4,D0 ;Size of record
SUB.W D0,SP ;Make handy buffer
MOVE.L SP,-(SP) ;Push PIXMAP pointer
MOVE.W D0,-(SP) ;Push length
JSR GetPicData ;Get the information
; SKIP THE COLOR TABLE.
JSR GETLONG ;Skip the seed
JSR GETLONG ;Get TRANSINDEX, SIZE
ADDQ #1,D0 ;Make size 1-based
MULU #CTENTRYSIZE,D0 ;Get size of table
JSR SkipPicData ;Skip the rest of the table
; SKIP PIXMAP DATA FROM PICTURE
LEA -4(SP),A1 ;GET PIXMAP POINTER
MOVE BOUNDS+BOTTOM(A1),D1 ;GET TOP OF PIXMAP
SUB BOUNDS+TOP(A1),D1 ;CALC HEIGHT OF PIXMAP
MOVE ROWBYTES(A1),D0 ;GET WIDTH OF PIXMAP
AND #RBMASK,D0 ;MASK OFF FLAG BITS
CMP #8,D0 ;IS ROWBYTES < 8
BLT.S @NOPACK ;=>YES, DON'T UNPACK
MOVEM.L D3-D4,-(SP) ;SAVE WORK REGS
MOVE D0,D3 ;SAVE ROWBYTES
MOVE D1,D4 ;SAVE HEIGHT
BRA.S @START1 ;GO TO LOOP START
@MORE1
CMP #250,D3 ;IS ROWBYTES > 250
BGT.S @3 ;=>YES, GET WORD
JSR GetUByte ;ELSE GET A BYTE INTO D0
BRA.S @2 ;=>AND GO GET DATA
@3 JSR GETWORD ;GET A WORD INTO D0
@2
SWAP D0 ;HIGH WORD
CLR.W D0 ;MAKE SURE IT'S 0
SWAP D0 ;GET BACK IN RIGHT ORDER
JSR SkipPicData ;Skip that much
@START1
DBRA D4,@MORE1 ;LOOP HEIGHT ROWS
MOVEM.L (SP)+,D3-D4 ;RESTORE WORK REGS
BRA.S @PIXDONE ;CONTINUE
;
; ROWBYTES < 8, DON'T USE PACKING
;
@NOPACK
MULU D1,D0 ;GET DATA SIZE
JSR SkipPicData ;Skip that much
@PIXDONE
ADD #PMREC-4,SP ;POP PIXMAP
PATDONE
MOVE.L (SP)+,(SP) ;STRIP PARAM
RTS ;AND RETURN
GetPM1Deep PROC EXPORT
IMPORT GetUByte,GetWord,GetPicData
;------------------------------------------------------
;
; PROCEDURE GetPM1Deep(myDst: Ptr; xTab: Ptr; myData: Handle; targetRB: INTEGER); <19Feb87 DBG>
;
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (GetPM1Deep) (GetPM1Deep)
;
; HANDLE SIZE IS SET TO ROWBYTES*(BOUNDS.BOTTOM-BOUNDS.TOP) EXTERNALLY
;
PARAMSIZE EQU 14
MYDST EQU PARAMSIZE+8-4 ;DST PIXMAP POINTER
XTAB EQU MYDST-4 ;TRANSLATE TABLE POINTER <19Feb87 DBG>
MYDATA EQU XTAB-4 ;DST DATA HANDLE <19Feb87 DBG>
TARGETRB EQU MYDATA-2 ;TARGET ROWBYTES
SRCPTR EQU -4 ;VAR POINTER TO SOURCE
DSTPTR EQU SRCPTR-4 ;VAR POINTER TO DST
PACKBUF EQU DSTPTR-4 ;POINTER TO PACKING BUFFER
SAVESP EQU PACKBUF-4 ;PRESERVE STACK POINTER
BITSDST EQU SAVESP-4 ;CURRENT OUTPUT POINTER
MUSTMAP EQU BITSDST-2 ;NEED TO MAP?
VARSIZE EQU MUSTMAP
LINK A6,#VARSIZE ;MAKE A STACK FRAME
MOVEM.L D3-D7/A2-A4,-(SP) ;SAVE WORK REGISTERS
MOVE.L SP,SAVESP(A6) ;PRESERVE STACK POINTER
MOVE.L MYDST(A6),A2 ;POINT TO PIXMAP
MOVE.L MYDATA(A6),A0 ;GET DATA HANDLE
; _HLOCK ;LOCK IT DOWN
MOVE.L (A0),BITSDST(A6) ;GET DATA POINTER IN BITSDST
MOVE BOUNDS+BOTTOM(A2),D7
SUB BOUNDS+TOP(A2),D7 ;HEIGHT := BOUNDS BOT - TOP
MOVE ROWBYTES(A2),D5 ;GET ROWBYTES
SMI MUSTMAP(A6) ;SET FLAG IFF PIXMAP
AND #RBMASK,D5 ;CLEAR OFF FLAG BITS
;
; Here we calculate ROWBYTES + ROWBYTES/64, rounded up to an even number.
; The worst-case expansion from _PackBits is one extra byte for every
; 127 bytes of data. Rather than divide by 127, we divide by 64, the next
; lowest power of 2.
;
MOVE D5,D6 ;COPY ROWBYTES
ADD #63,D6 ;MAKE SURE TO ROUND UP!
LSR.W #6,D6 ;GET CEIL(ROWBYTES/64)
ADDQ.W #1,D6 ;ROUND UP...
BCLR #0,D6 ;...TO EVEN NUMBER
ADD D5,D6 ;SIZE OF PACKED BUFFER
CMP #8,D5 ;ROWBYTES < 8?
BGE.S @DOUNPACK ;=>NO, GO DO UNPACK
TST ROWBYTES(A2) ;BITMAP, NOT PIXMAP?
BPL NOPACK ;GO READ IT STRAIGHT IN
@DOUNPACK
TST.B MUSTMAP(A6) ;PIXMAP?
BEQ.S @GETBUF ;=>NO, BITMAP: GET BUF
MOVE PIXELSIZE(A2),D4 ;=>YES, PIXMAP: GET BITS/PIXEL
MOVE D4,D0 ;COPY IT
LSL.W #1,D0 ;DOUBLE IT
NEG.W D0 ;NEGATE IT
; ??? 64K ROM problem. Need to do LEA on 64K ROM. ???
_GetMaskTable ;GET MASK TABLE ADDRESS
MOVE (16*2*2)(A0,D0.W),D3 ;GET MASK FOR PIXEL
MOVE.L XTAB(A6),A4 ;XLATE TABLE POINTER <19Feb87 DBG>
CMP.W #1,D4 ;TEST BITS/PIXEL
BNE.S @GETBUF ;IF <>1, MUST MAP
CMP.W #$0001,(A4) ;MAPPING NEEDED? <19Feb87 DBG>
SNE MUSTMAP(A6) ;IF NOT $0001, MUST MAP
;----------------------------------------------------------------
;
; ALLOCATE PACKBUF ON THE STACK
;
@GETBUF
SUB D5,SP ;SET SIZE OF PACKBUF
SUB D6,SP ;TO (2 1/64)*ROWBYTES
MOVE.L SP,PACKBUF(A6) ;POINT TO PACKBUF
;----------------------------------------------------------------
;
; ROWBYTES >= 8, READ THE PACKED BIT/PIXMAP FROM THE PICTURE
;
; PACKED FORMAT = [BYTECOUNT][DATA] FOR EACH SCANLINE
;
; IF ROWBYTES > 250 THEN BYTECOUNT IS A WORD, ELSE IT IS A BYTE
;
MOVE.L BITSDST(A6),DSTPTR(A6) ;PUT DEST BITMAP, JUST IN CASE
BRA.S START1 ;GO TO LOOP START
MORE1
CMP #8,D5 ;IS ROWBYTES < 8
BGE.S @0 ;=>YES, SEE WHAT SIZE TO GET
MOVE D5,D0 ;USE ROWBYTES
BRA.S @2 ;GO GET ROW
@0 CMP #250,D5 ;IS ROWBYTES > 250?
BGT.S @1 ;=>YES, GET WORD
JSR GetUByte ;ELSE GET A BYTE INTO D0
BRA.S @2 ;=>AND GO GET DATA
@1 JSR GETWORD ;GET A WORD INTO D0
@2 MOVE.L PACKBUF(A6),A0 ;GET ADDR OF BUFFER
MOVE.L A0,-(SP) ;PUSH ON STACK
MOVE.L A0,SRCPTR(A6) ;PUT IN SRCPTR TOO
TST.B MUSTMAP(A6) ;NEED TO MAP?
BPL.S @NOTMAP ;=>NO, LEAVE DST->REAL BITS
ADD D6,A0 ;POINT AT DEST
MOVE.L A0,DSTPTR(A6) ;PUT IN DSTPTR
@NOTMAP
MOVE D0,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;GET ONE ROW
MOVE.L PACKBUF(A6),A0 ;GET SOURCE
CMP #8,D5 ;IS ROWBYTES < 8
BLT.S @UNPACKED ;=>YES, GO SQUISH IT
PEA SRCPTR(A6) ;PUSH VAR SRCPTR
PEA DSTPTR(A6) ;PUSH VAR DSTPTR
MOVE D5,-(SP) ;PUSH ROWBYTES
_UnpackBits ;UNPACK INTO DATA HANDLE
MOVE.L PACKBUF(A6),A0 ;POINT AT SOURCE BUFFER
ADD D6,A0 ;POINT AT UNPACKED BITS
@UNPACKED
TST.B MUSTMAP(A6) ;MAPPING NEEDED?
BEQ.S START1 ;=>NO, DON'T DO IT
JSR MapRow ;Map the row
START1 DBRA D7,MORE1 ;LOOP HEIGHT ROWS
BRA.S DONE ;CONTINUE
;
; ROWBYTES < 8, DON'T USE PACKING
;
NOPACK MULU D7,D5 ;BYTECOUNT := HEIGHT * WIDTH
MOVE.L BITSDST(A6),-(SP) ;PUSH DATA POINTER
MOVE D5,-(SP) ;PUSH BYTECOUNT
JSR GetPicData ;READ BITMAP DATA BITS
DONE
; MOVE.L MYDATA(A6),A0 ;GET DATA HANDLE
; _HUNLOCK ;UNLOCK THE HANDLE
MOVE.L SAVESP(A6),SP ;RESTORE STACK POINTER
MOVEM.L (SP)+,D3-D7/A2-A4 ;RESTORE WORK REGISTERS
PUNLINK PARAMSIZE,'GETPMDAT' ;UNLINK AND RETURN
;-----------------------------------------------
;
; MapRow - internal utility to map a row to a one-bit-deep row
; and copy it into the target bitmap.
; Uses up-level stack frame. Source ptr passed in A0.
;
MapRow
;
; Now it's time to actually shrink the bits.
; We build up a word of output at a time (since rowbytes is even, it doesn't
; matter if we convert a slop byte), then write it out. We have two loops:
; An outer one over words of output, and an inner one over words of input.
; In the interests of patch compactness, the only special case we make is
; if the number of colors is <= 32, in which case we keep the color mapping
; bitmap in D6 for speed.
;
MOVEM.W D5-D7,-(SP) ;SAVE REGISTERS
MOVE BOUNDS+RIGHT(A2),D7 ;GET BOUNDS.RIGHT
SUB BOUNDS+LEFT(A2),D7 ;CALC WIDTH
MOVE.L BITSDST(A6),A1 ;Destination pointer
CMP.W #8,D4 ;8 BITS/PIXEL?
BEQ.S EIGHTLOOP ;=>YES, USE CUSTOM LOOP
;
; Start of the shrinking loop. A0 is source, A1 is destination.
; We assume an even number of pixels per 16-bit word. They are isolated,
; one by one, and a one or zero or'd in to the output word we're building up.
;
@NEXTOUTWORD
MOVEQ #16,D6 ;BITS/OUTPUT WORD
MOVEQ #0,D2 ;OUTPUT WORD
@NEXTINWORD
MOVEQ #16,D1 ;BITS IN INPUT WORD
MOVE (A0)+,D5 ;GET NEXT INPUT WORD
@NEXTPIX
ROL.W D4,D5 ;ISOLATE NEXT PIXEL
MOVE D5,D0 ;GET COPY
AND D3,D0 ;GET PIXEL
LSL.W #1,D2 ;MAKE ROOM FOR NEW PIXEL
OR.B (A4,D0.W),D2 ;GET NEW PIXEL <19Feb87 DBG>
SUBQ #1,D7 ;ONE LESS PIXEL
SUBQ #1,D6 ;ONE LESS OUTPUT PIXEL
SUB D4,D1 ;BITS LEFT IN INPUT WORD
BGT.S @NEXTPIX ;IF SOME LEFT, GET NEXT PIX
TST D7 ;ANY INPUT LEFT?
BLE.S @1 ;NO, DONE WITH LINE
TST D6 ;ANY OUTPUT ROOM LEFT?
BGT.S @NEXTINWORD ;YES, GET NEXT INPUT WORD
MOVE D2,(A1)+ ;WRITE AN OUTPUT WORD
BRA.S @NEXTOUTWORD
@1
LSL.W D6,D2 ;LEFT JUSTIFY LAST WORD
MOVE D2,(A1)+ ;WRITE AN OUTPUT WORD
MOVEQ #0,D0 ;CLEAR OUT LONG
MOVE TARGETRB(A6),D0 ;GET TARGET ROWBYTES
ADD.L D0,BITSDST(A6) ;NEXT SCAN LINE
BRA.S SHRUNK ;EXIT
;
; Here is the custom loop for eight bit pixels. Principle is
; the same as the previous loop.
;
EIGHTLOOP
MOVEQ #0,D0 ;CLEAR PIXEL BUFFER/ROWBYTES
@NEXTOUTWORD
MOVEQ #15,D6 ;BITS/OUTPUT WORD (-1)
MOVEQ #0,D2 ;OUTPUT WORD
@NEXTPIX
MOVE.B (A0)+,D0 ;GET NEXT INPUT BYTE
LSL.W #1,D2 ;MAKE ROOM FOR NEW PIXEL
OR.B (A4,D0.W),D2 ;GET IT <19Feb87 DBG>
SUBQ #1,D7 ;ONE LESS PIXEL
BLE.S @1 ;IF NONE LEFT, DONE WITH ROW
DBRA D6,@NEXTPIX ;LOOP FOR NEXT PIXEL
MOVE D2,(A1)+ ;WRITE AN OUTPUT WORD
BRA.S @NEXTOUTWORD
@1
LSL.W D6,D2 ;LEFT JUSTIFY LAST WORD
MOVE D2,(A1)+ ;WRITE LAST OUTPUT WORD
MOVE TARGETRB(A6),D0 ;GET TARGET ROWBYTES (HIWRD CLR)
ADD.L D0,BITSDST(A6) ;NEXT SCAN LINE
SHRUNK
MOVEM.W (SP)+,D5-D7 ;Restore registers
RTS ;EXIT
RGB2OLD PROC EXPORT
;-----------------------------------------------
;
; UTILITY TO CONVERT AN RGB (POINTED TO BY A1) VALUE
; TO AN OLD STYLE COLOR VALUE. RETURNS VALUE IN D0. CLOBBERS D0,D1
;
; USES HIGH BIT OF EACH COMPONENT TO SELECT RGB OFF (0) OR ON (1)
MOVEQ #0,D1 ; clear out D1
MOVE (A1)+,D1 ; get red
LSL.L #1,D1 ; get high bit
MOVE (A1)+,D1 ; get green
LSL.L #1,D1 ; get high bit
MOVE (A1)+,D1 ; get blue
LSL.L #1,D1 ; get high bit
SWAP D1 ; get RGB index
LSL.W #1,D1 ; Make a word index
MOVEQ #0,D0 ; clear out target
MOVE.W MapTBL(D1.W),D0 ; convert to planar value
RTS ; => all done
; TABLE TO MAP FROM 3 BIT RGB TO OLD-STYLE COLOR INDICES
MapTBL DC.W blackColor ; RBG = 0,0,0 -> black
DC.W blueColor ; RBG = 0,0,1 -> blue
DC.W greenColor ; RBG = 0,1,0 -> green
DC.W cyanColor ; RBG = 0,1,1 -> cyan
DC.W redColor ; RBG = 1,0,0 -> red
DC.W magentaColor ; RBG = 1,0,1 -> magenta
DC.W yellowColor ; RBG = 1,1,0 -> yellow
DC.W whiteColor ; RBG = 1,1,1 -> white
RGB2Pat PROC EXPORT
ENTRY RGB2Pixel
;-----------------------------------------------
;
; UTILITY TO CONVERT AN RGB (POINTED TO BY A1) VALUE
; TO AN OLD STYLE GRAY PATTERN. RETURNS HALF-PATTERN IN D0. CLOBBERS D1.
;
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (RGB2Pat) (RGB2Pat)
;
; USES COMPUTED GRAY LEVEL TO SELECT A PATTERN
MOVE (A1)+,D1 ; Get Red
MULU #$4CCC,D1 ; Weight for Red
MOVE (A1)+,D0 ; Get Green
MULU #$970A,D0 ; Weight for Green
ADD.L D0,D1 ; Add in
MOVE (A1)+,D0 ; Get Blue
MULU #$1C28,D0 ; Weight for Blue
ADD.L D0,D1 ; Get sum: luminance of RGB
CLR D1 ; Clear low word
ROL.L #3,D1 ; Get high three bits (0-7)
LSL.W #2,D1 ; Get long offset
MOVE.L PatTBL(D1.W),D0 ; Get half-pattern
RTS
PatTBL
DC.L $FFFFFFFF ; Gray = 0 -> black
DC.L $DDFF77FF ; Gray = 1 -> 7/8 gray
DC.L $FF55FF55 ; Gray = 2 -> 3/4 gray
DC.L $EE55BB55 ; Gray = 3 -> 5/8 gray
DC.L $AA55AA55 ; Gray = 4 -> 1/2 gray
DC.L $88552255 ; Gray = 5 -> 3/8 gray
; DC.L $AA00AA00 ; Gray = 5 -> 1/4 gray
DC.L $88002200 ; Gray = 6 -> 1/8 gray
DC.L $00000000 ; Gray = 7 -> white
;-----------------------------------------------
;
; UTILITY TO CONVERT AN RGB (POINTED TO BY A0) VALUE <19Feb87 DBG>
; TO A SINGLE PIXEL. RETURNS VALUE IN D0.B. CLOBBERS D1.
;
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (RGB2Pixel) (RGB2Pixel)
;
; USES COMPUTED GRAY LEVEL TO SELECT A PATTERN
RGB2Pixel
MOVEQ #0,D1 ; Clear out
MOVE (A0)+,D1 ; Get Red <19Feb87 DBG>
MOVEQ #0,D0 ; Clear out
MOVE (A0)+,D0 ; Get Green <19Feb87 DBG>
ADD.L D0,D1 ; Add in
MOVE (A0)+,D0 ; Get Blue <19Feb87 DBG>
ADD.L D0,D1 ; Get sum
DIVU #3,D1 ; Compute unweighted Gray value
SGE D0 ; Should be 1 (black) if <$8000
NEG.B D0 ; Make single bit
RTS
IF onMac THEN
MapRatio PROC EXPORT
;-------------------------------------------------------------
;
; PROCEDURE MapRatio(VAR numer, denom: Point; fromRect: Rect);
;
; Fix File Date Patch# Fix Routine(s) Routine(s) Fixed
;AppleSystemPatch DrawPicturePatch.a 01Jan1904 #??? (MapRatio) (MapRatio)
;
; Map ratio so that denom.h/.v = height/width of fromRect.
; This is so that later scaling of the numerator will have some
; range to work within.
;
; NOTE: Only necessary because fractional numer, denom not used
;
; numer.h := numer.h * fromWidth / denom.h
; denom.h := fromWidth
; numer.v := numer.v * fromHeight / denom.v
; denom.v := fromHeight
PARAMSIZE EQU 12 ; TOTAL BYTES OF PARAMS
NUMER EQU PARAMSIZE+8-4 ; LONG, ADDR OF POINT
DENOM EQU NUMER-4 ; LONG, ADDR OF POINT
FROMRECT EQU DENOM-4 ; LONG, ADDR OF RECT
LINK A6,#0 ; NO LOCALS
MOVEM.L D0-D1/A0-A2,-(SP) ; SAVE REGS
MOVE.L NUMER(A6),A0 ; point to numer
MOVE.L DENOM(A6),A1 ; point to denom
MOVE.L FROMRECT(A6),A2 ; point to fromRect
MOVE.W right(A2),D0 ; get fromRect right
SUB.W left(A2),D0 ; get fromWidth
MOVE.W h(A0),D1 ; get numer.h
MULU D0,D1 ; multiply by fromWidth
DIVU h(A1),D1 ; divide by denom.h
MOVE.W D1,h(A0) ; update numer.h
MOVE.W D0,h(A1) ; update denom.h
MOVE.W bottom(A2),D0 ; get fromRect bottom
SUB.W top(A2),D0 ; get fromHeight
MOVE.W v(A0),D1 ; get numer.v
MULU D0,D1 ; multiply by fromHeight
DIVU v(A1),D1 ; divide by denom.v
MOVE.W D1,v(A0) ; update numer.v
MOVE.W D0,v(A1) ; update denom.v
DONE MOVEM.L (SP)+,D0-D1/A0-A2 ; RESTORE REGS
PUNLINK PARAMSIZE,'MAPRATIO'
ENDIF
ENDPROC
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