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UFilters.a
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UFilters.a
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;Photoshop version 1.0.1, file: UFilters.a
; Computer History Museum, www.computerhistory.org
; This material is (C)Copyright 1990 Adobe Systems Inc.
; It may not be distributed to third parties.
; It is licensed for non-commercial use according to
; www.computerhistory.org/softwarelicense/photoshop/
INCLUDE 'Traps.a'
; **********************************************************************
SEG 'ADoCommand'
UpdateTotals PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE UpdateTotals (buffPtr: Ptr;
; dataPtr: Ptr;
; count: INTEGER;
; radius: INTEGER;
; add: BOOLEAN);
;
; Parameter Offsets
@buffPtr EQU 18
@dataPtr EQU 14
@count EQU 12
@radius EQU 10
@add EQU 8
; Size of parameters
@params EQU 14
; Save registers
LINK A6,#0
; Unload addresses
MOVE.L @buffPtr(A6),A0
MOVE.L @dataPtr(A6),A1
; Use first pixel radius times
MOVE.W @radius(A6),D0
SUB.W #1,D0
CLR.W D1
MOVE.B (A1),D1
TST.B @add(A6)
BNE.S @1
NEG.W D1
@1 ADD.W D1,(A0)+
DBF D0,@1
; Now use count pixels
MOVE.W @count(A6),D0
SUB.W #1,D0
CLR.W D1
TST.B @add(A6)
BEQ.S @3
@2 MOVE.B (A1)+,D1
ADD.W D1,(A0)+
DBF D0,@2
BRA.S @4
@3 MOVE.B (A1)+,D1
SUB.W D1,(A0)+
DBF D0,@3
; Use last pixel radius times
@4 MOVE.W @radius(A6),D0
SUB.W #1,D0
TST.B @add(A6)
BNE.S @5
NEG.W D1
@5 ADD.W D1,(A0)+
DBF D0,@5
; Clean up and exit
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoCommand'
DoBoxFilter PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoBoxFilter (buffPtr: Ptr;
; dataPtr: Ptr;
; radius: INTEGER;
; count: INTEGER);
;
; Parameter Offsets
@buffPtr EQU 16
@dataPtr EQU 12
@radius EQU 10
@count EQU 8
; Size of parameters
@params EQU 12
; Save registers
LINK A6,#0
MOVEM.L A2/D3-D4,-(SP)
; Unload address
MOVE.L @buffPtr(A6),A0
MOVE.L A0,A1
MOVE.L @dataPtr(A6),A2
; D0 = area of box
MOVE.W @radius(A6),D0
ASL.W #1,D0
ADD.W #1,D0
MULU.W D0,D0
; Compute initial total
MOVE.L D0,D1
ASR.L #1,D1
MOVE.W @radius(A6),D2
ASL.W #1,D2
SUB.W #1,D2
CLR.L D3
@1 MOVE.W (A0)+,D3
ADD.L D3,D1
DBF D2,@1
; Initialize loop
MOVE.W @count(A6),D2
SUB.W #1,D2
; Add in leading total
@2 MOVE.W (A0)+,D3
ADD.L D3,D1
; Compute output value
MOVE.L D1,D4
DIVU.W D0,D4
MOVE.B D4,(A2)+
; Subtract trailing total
MOVE.W (A1)+,D3
SUB.L D3,D1
; Move to next pixel
DBF D2,@2
; Clean up and exit
MOVEM.L (SP)+,A2/D3-D4
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoCommand'
DoWeightedFilter PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE DoWeightedFilter (srcPtr: Ptr;
; dstPtr: Ptr;
; step: INTEGER;
; count: INTEGER;
; radius: INTEGER;
; weights: Ptr);
;
; Parameter Offsets
@srcPtr EQU 22
@dstPtr EQU 18
@step EQU 16
@count EQU 14
@radius EQU 12
@weights EQU 8
; Size of parameters
@params EQU 18
; Save registers
LINK A6,#0
MOVEM.L A2-A4/D3-D5,-(SP)
; Unload parameters
MOVE.L @srcPtr(A6),A0
MOVE.L @dstPtr(A6),A1
MOVE.L @weights(A6),A2
MOVE.W @step(A6),D0
MOVE.W @count(A6),D1
SUB.W #1,D1
MOVE.W @radius(A6),D2
ASL.W #1,D2
; Compute weighted average
@1 MOVE.L A0,A3
ADDA.W #1,A0
MOVE.L A2,A4
MOVE.W D2,D3
MOVE.L #$8000,D4
@2 CLR.W D5
MOVE.B (A3),D5
ADDA.W D0,A3
MULU.W (A4)+,D5
ADD.L D5,D4
DBF D3,@2
SWAP D4
MOVE.B D4,(A1)+
DBF D1,@1
; Clean up and exit
MOVEM.L (SP)+,A2-A4/D3-D5
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoFilter'
SobelLine PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE SobelLine (prevPtr: Ptr;
; thisPtr: Ptr;
; nextPtr: Ptr;
; destPtr: Ptr;
; count: INTEGER;
; atStart: BOOLEAN;
; atEnd: BOOLEAN);
;
; Parameter Offsets
@prevPtr EQU 26
@thisPtr EQU 22
@nextPtr EQU 18
@destPtr EQU 14
@count EQU 12
@atStart EQU 10
@atEnd EQU 8
; Size of parameters
@params EQU 22
; Local variables
@p1 EQU -2
@p2 EQU -4
@p3 EQU -6
@p4 EQU -8
@p5 EQU -10
@p6 EQU -12
@p7 EQU -14
@p8 EQU -16
@p9 EQU -18
; Size of local variables
@localVars EQU -18
; Save registers
LINK A6,#@localVars
MOVEM.L A2-A4,-(SP)
; Unload pointers
MOVE.L @prevPtr(A6),A0
MOVE.L @thisPtr(A6),A1
MOVE.L @nextPtr(A6),A2
MOVE.L @destPtr(A6),A3
; Load hypot table
LEA @table,A4
; Initialize local variables
CLR.W @p1(A6)
CLR.W @p2(A6)
CLR.W @p3(A6)
CLR.W @p4(A6)
CLR.W @p5(A6)
CLR.W @p6(A6)
CLR.W @p7(A6)
CLR.W @p8(A6)
CLR.W @p9(A6)
; Initialize loop
MOVE.W @count(A6),D0
SUB.W #1,D0
; Copy pixel values to local variables
@1 MOVE.B -1(A0),@p1+1(A6)
MOVE.B (A0)+,@p2+1(A6)
MOVE.B (A0),@p3+1(A6)
MOVE.B -1(A1),@p4+1(A6)
MOVE.B (A1)+,@p5+1(A6)
MOVE.B (A1),@p6+1(A6)
MOVE.B -1(A2),@p7+1(A6)
MOVE.B (A2)+,@p8+1(A6)
MOVE.B (A2),@p9+1(A6)
; If at start, copy center column to first column
TST.B @atStart(A6)
BEQ.S @2
CLR.B @atStart(A6)
MOVE.W @p2(A6),@p1(A6)
MOVE.W @p5(A6),@p4(A6)
MOVE.W @p8(A6),@p7(A6)
; If at end, copy center column to last column
@2 TST.W D0
BNE.S @3
TST.B @atEnd(A6)
BEQ.S @3
MOVE.W @p2(A6),@p3(A6)
MOVE.W @p5(A6),@p6(A6)
MOVE.W @p8(A6),@p9(A6)
; Compute x
@3 MOVE.W @p3(A6),D1
ADD.W @p6(A6),D1
ADD.W @p6(A6),D1
ADD.W @p9(A6),D1
SUB.W @p1(A6),D1
SUB.W @p4(A6),D1
SUB.W @p4(A6),D1
SUB.W @p7(A6),D1
; Compute abs value
BPL.S @4
NEG.W D1
; Compute y
@4 MOVE.W @p1(A6),D2
ADD.W @p2(A6),D2
ADD.W @p2(A6),D2
ADD.W @p3(A6),D2
SUB.W @p7(A6),D2
SUB.W @p8(A6),D2
SUB.W @p8(A6),D2
SUB.W @p9(A6),D2
; Compute abs value
BPL.S @5
NEG.W D2
; Make D2 the larger
@5 CMP.W D1,D2
BGE.S @6
EXG D1,D2
; Make sure both are not zero
@6 TST.W D2
BEQ.S @7
; Compute table index
EXT.L D1
LSL.L #8,D1
DIVU.W D2,D1
; Scale by table value
LSL.W #1,D1
MULU.W (A4,D1.W),D2
LSL.L #2,D2
SWAP D2
; Truncate to 255
CMP.W #255,D2
BLE.S @7
MOVE.L #-1,D2
; Store and move to next pixel
@7 MOVE.B D2,(A3)+
DBF D0,@1
; Clean up and exit
MOVEM.L (SP)+,A2-A4
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; Hypotenuse Table
@table DC.W 16384,16384,16384,16385,16386,16387,16388,16390
DC.W 16392,16394,16396,16399,16402,16405,16408,16412
DC.W 16416,16420,16424,16429,16434,16439,16444,16450
DC.W 16456,16462,16468,16475,16482,16489,16496,16504
DC.W 16512,16520,16528,16536,16545,16554,16564,16573
DC.W 16583,16593,16603,16614,16624,16635,16646,16658
DC.W 16670,16681,16694,16706,16719,16731,16745,16758
DC.W 16771,16785,16799,16813,16828,16843,16858,16873
DC.W 16888,16904,16920,16936,16952,16969,16985,17002
DC.W 17020,17037,17055,17073,17091,17109,17128,17146
DC.W 17165,17185,17204,17224,17243,17264,17284,17304
DC.W 17325,17346,17367,17388,17410,17432,17454,17476
DC.W 17498,17521,17543,17566,17590,17613,17637,17660
DC.W 17684,17709,17733,17758,17782,17807,17832,17858
DC.W 17883,17909,17935,17961,17988,18014,18041,18068
DC.W 18095,18122,18149,18177,18205,18233,18261,18289
DC.W 18318,18347,18375,18405,18434,18463,18493,18523
DC.W 18552,18583,18613,18643,18674,18705,18736,18767
DC.W 18798,18830,18861,18893,18925,18957,18989,19022
DC.W 19054,19087,19120,19153,19186,19220,19253,19287
DC.W 19321,19355,19389,19423,19458,19492,19527,19562
DC.W 19597,19632,19667,19703,19739,19774,19810,19846
DC.W 19882,19919,19955,19992,20029,20066,20103,20140
DC.W 20177,20214,20252,20290,20327,20365,20403,20442
DC.W 20480,20518,20557,20596,20635,20674,20713,20752
DC.W 20791,20831,20870,20910,20950,20990,21030,21070
DC.W 21110,21151,21191,21232,21273,21314,21355,21396
DC.W 21437,21478,21520,21561,21603,21645,21686,21728
DC.W 21771,21813,21855,21897,21940,21983,22025,22068
DC.W 22111,22154,22197,22240,22284,22327,22371,22414
DC.W 22458,22502,22546,22590,22634,22678,22722,22767
DC.W 22811,22856,22901,22945,22990,23035,23080,23125
DC.W 23170
; **********************************************************************
SEG 'ADoCommand'
MinOrMaxRow PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE MinOrMaxRow (srcPtr: Ptr;
; dstPtr: Ptr;
; count: INTEGER;
; maxFlag: BOOLEAN);
;
; Parameter Offsets
@srcPtr EQU 16
@dstPtr EQU 12
@count EQU 10
@maxFlag EQU 8
; Size of parameters
@params EQU 12
; Save registers
LINK A6,#0
MOVE.L D3,-(SP)
; Unload pointers
MOVE.L @srcPtr(A6),A0
MOVE.L @dstPtr(A6),A1
; Initial 3 pixel wide buffer
MOVE.B (A0)+,D3
MOVE.B D3,D2
; Loop through all except last
MOVE.W @count(A6),D0
SUB.W #2,D0
; If only 1 pixel wide, just copy it
BPL.S @1
MOVE.B D2,(A1)
BRA.S @exit
; Decide which loop to use
@1 TST.B @maxFlag(A6)
BNE.S @6
; Minimum value loop
@2 MOVE.B D2,D1
MOVE.B D3,D2
MOVE.B (A0)+,D3
CMP.B D2,D1
BLS.S @3
MOVE.B D2,D1
@3 CMP.B D3,D1
BLS.S @4
MOVE.B D3,D1
@4 MOVE.B D1,(A1)+
DBF D0,@2
CMP.B D3,D2
BLS.S @5
MOVE.B D3,D2
@5 MOVE.B D2,(A1)
BRA.S @exit
; Maximum value loop
@6 MOVE.B D2,D1
MOVE.B D3,D2
MOVE.B (A0)+,D3
CMP.B D2,D1
BHS.S @7
MOVE.B D2,D1
@7 CMP.B D3,D1
BHS.S @8
MOVE.B D3,D1
@8 MOVE.B D1,(A1)+
DBF D0,@6
CMP.B D3,D2
BHS.S @9
MOVE.B D3,D2
@9 MOVE.B D2,(A1)
; Clean up and exit
@exit MOVE.L (SP)+,D3
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoCommand'
MinOrMaxRows PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE MinOrMaxRows (prevPtr: Ptr;
; thisPtr: Ptr;
; nextPtr: Ptr;
; destPtr: Ptr;
; count: INTEGER;
; maxFlag: BOOLEAN);
;
; Parameter Offsets
@prevPtr EQU 24
@thisPtr EQU 20
@nextPtr EQU 16
@destPtr EQU 12
@count EQU 10
@maxFlag EQU 8
; Size of parameters
@params EQU 20
; Save registers
LINK A6,#0
MOVEM.L A2-A3,-(SP)
; Unload pointers
MOVE.L @prevPtr(A6),A0
MOVE.L @thisPtr(A6),A1
MOVE.L @nextPtr(A6),A2
MOVE.L @destPtr(A6),A3
; Initialize loop
MOVE.W @count(A6),D0
SUB.W #1,D0
; Decide which loop to use
TST.B @maxFlag(A6)
BNE.S @4
; Minimum value loop
@1 MOVE.B (A0)+,D1
MOVE.B (A1)+,D2
CMP.B D2,D1
BLS.S @2
MOVE.B D2,D1
@2 MOVE.B (A2)+,D2
CMP.B D2,D1
BLS.S @3
MOVE.B D2,D1
@3 MOVE.B D1,(A3)+
DBF D0,@1
BRA.S @7
; Maximum value loop
@4 MOVE.B (A0)+,D1
MOVE.B (A1)+,D2
CMP.B D2,D1
BHS.S @5
MOVE.B D2,D1
@5 MOVE.B (A2)+,D2
CMP.B D2,D1
BHS.S @6
MOVE.B D2,D1
@6 MOVE.B D1,(A3)+
DBF D0,@4
; Clean up and exit
@7 MOVEM.L (SP)+,A2-A3
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoFilter'
ConvolveRow PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE ConvolveRow (inPtr: Ptr;
; outPtr: Ptr;
; numRows: INTEGER;
; numCols: INTEGER;
; rowBytes: INTEGER;
; row: INTEGER;
; col1: INTEGER;
; col2: INTEGER;
; kernel: UNIV Ptr);
; Parameter Offsets
@inPtr EQU 28
@outPtr EQU 24
@numRows EQU 22
@numCols EQU 20
@rowBytes EQU 18
@row EQU 16
@col1 EQU 14
@col2 EQU 12
@kernel EQU 8
; Size of parameters
@params EQU 24
; Save registers
LINK A6,#0
MOVEM.L A2-A3/D3-D7,-(SP)
; A0 is the input pointer
MOVE.L @inPtr(A6),A0
; A1 is the output pointer
MOVE.L @outPtr(A6),A1
; A2 points to the kernel
MOVE.L @kernel(A6),A2
; D0 and D1 are current row and column
MOVE.W @row(A6),D0
MOVE.W @col1(A6),D1
; D2 is computed total
@1 CLR.L D2
; D3 is element counter
MOVE.W (A2),D3
; A3 is pointer to kernel element
LEA 16(A2),A3
; D7 is inside valid rectangle flag
MOVE.L #1,D7
CMP.W 8(A2),D0
BGE.S @2
CLR.W D7
@2 CMP.W 10(A2),D1
BGE.S @3
CLR.W D7
@3 CMP.W 12(A2),D0
BLT.S @4
CLR.W D7
@4 CMP.W 14(A2),D1
BLT.S @5
CLR.W D7
; Process next kernel element
@5 TST.W D7
BNE.S @10
; Compute clipped offset
MOVE.W D0,D5
MOVE.W D1,D6
ADD.W (A3),D5
BPL.S @6
CLR.W D5
@6 ADD.W 2(A3),D6
BPL.S @7
CLR.W D6
@7 CMP.W @numRows(A6),D5
BLT.S @8
MOVE.W @numRows(A6),D5
SUB.W #1,D5
@8 CMP.W @numCols(A6),D6
BLT.S @9
MOVE.W @numCols(A6),D6
SUB.W #1,D6
@9 SUB.W D0,D5
SUB.W D1,D6
MULS.W @rowBytes(A6),D5
EXT.L D6
ADD.L D6,D5
BRA.S @11
; Center is inside valid rectangle, use offset
@10 MOVE.L 8(A3),D5
; Load in pixel value
@11 CLR.L D4
MOVE.B (A0,D5.L),D4
; See if we can do a bit shift
MOVE.W 6(A3),D5
BMI.S @12
LSL.L D5,D4
TST.W 4(A3)
BPL.S @13
SUB.L D4,D2
BRA.S @14
; Else do a multiply
@12 MULS.W 4(A3),D4
@13 ADD.L D4,D2
; Move to next element
@14 ADDA.W #12,A3
DBF D3,@5
; Scale and store pixel
MOVE.W 6(A2),D3
BMI.S @17
TST.L D2
BPL.S @15
NEG.L D2
LSR.L D3,D2
NEG.W D2
BRA.S @16
@15 LSR.L D3,D2
@16 TST.W 2(A2)
BPL.S @18
NEG.W D2
BRA.S @18
@17 DIVS.W 2(A2),D2
@18 ADD.W 4(A2),D2
BPL.S @19
CLR.W D2
@19 CMP.W #255,D2
BLE.S @20
MOVE.W #255,D2
@20 MOVE.B D2,(A1)+
; Move to next pixel
ADDA.W #1,A0
ADD.W #1,D1
CMP.W @col2(A6),D1
BNE @1
; Clean up and exit
MOVEM.L (SP)+,A2-A3/D3-D7
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoFilter'
BlurLine PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE BlurLine (prevPtr: Ptr;
; thisPtr: Ptr;
; nextPtr: Ptr;
; destPtr: Ptr;
; count: INTEGER);
;
; Parameter Offsets
@prevPtr EQU 22
@thisPtr EQU 18
@nextPtr EQU 14
@destPtr EQU 10
@count EQU 8
; Size of parameters
@params EQU 18
; Save registers
LINK A6,#0
MOVEM.L A2-A3,-(SP)
; Unload pointers
MOVE.L @prevPtr(A6),A0
MOVE.L @thisPtr(A6),A1
MOVE.L @nextPtr(A6),A2
MOVE.L @destPtr(A6),A3
; D0 is loop counter
MOVE.W @count(A6),D0
SUB.W #1,D0
; Set up registers
CLR.W D1
CLR.W D2
; Compute new values
@1 MOVE.B (A1)+,D1
ASL.W #2,D1
MOVE.B (A0)+,D2
ADD.W D2,D1
MOVE.B (A2)+,D2
ADD.W D2,D1
MOVE.B (A1),D2
ADD.W D2,D1
MOVE.B -2(A1),D2
ADD.W D2,D1
ADD.W #4,D1
ASR.W #3,D1
MOVE.B D1,(A3)+
DBF D0,@1
; Clean up and exit
MOVEM.L (SP)+,A2-A3
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************
SEG 'ADoFilter'
BlurMoreLine PROC EXPORT
; Calling sequence (Pascal conventions):
;
; PROCEDURE BlurMoreLine (prevPtr: Ptr;
; thisPtr: Ptr;
; nextPtr: Ptr;
; destPtr: Ptr;
; count: INTEGER);
;
; Parameter Offsets
@prevPtr EQU 22
@thisPtr EQU 18
@nextPtr EQU 14
@destPtr EQU 10
@count EQU 8
; Size of parameters
@params EQU 18
; Save registers
LINK A6,#0
MOVEM.L A2-A3,-(SP)
; Unload pointers
MOVE.L @prevPtr(A6),A0
MOVE.L @thisPtr(A6),A1
MOVE.L @nextPtr(A6),A2
MOVE.L @destPtr(A6),A3
; D0 is loop counter
MOVE.W @count(A6),D0
SUB.W #1,D0
; Set up registers
CLR.W D1
CLR.W D2
; Compute new values
@1 MOVE.B -1(A1),D1
MOVE.B (A1)+,D2
ADD.W D2,D1
MOVE.B (A1),D2
ADD.W D2,D1
MOVE.B (A0)+,D2
ADD.W D2,D1
MOVE.B (A2)+,D2
ADD.W D2,D1
ADD.W D1,D1
MOVE.B -2(A0),D2
ADD.W D2,D1
MOVE.B (A0),D2
ADD.W D2,D1
MOVE.B -2(A2),D2
ADD.W D2,D1
MOVE.B (A2),D2
ADD.W D2,D1
ADD.W #7,D1
MULU.W #4681,D1
SWAP D1
MOVE.B D1,(A3)+
DBF D0,@1
; Clean up and exit
MOVEM.L (SP)+,A2-A3
UNLK A6
MOVE.L (SP)+,A0
ADD.W #@params,SP
JMP (A0)
; **********************************************************************