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- **********************************************************************
- *
- * Transfer routine for IFF_Printer
- *
- **********************************************************************
-
- INCLUDE "exec/types.i"
-
- INCLUDE "intuition/intuition.i"
- INCLUDE "devices/printer.i"
- INCLUDE "devices/prtbase.i"
- INCLUDE "devices/prtgfx.i"
-
- XREF _PD
-
- XDEF _Transfer
-
- SECTION printer,CODE
- _Transfer:
- ; Transfer(PInfo, y, ptr)
- ; struct PrtInfo *PInfo 4-7
- ; UWORD y; 8-11
- ; UBYTE *ptr; 12-15
- ; UWORD colors[]; 16-19
- ;
-
- movem.l d2-d6/a2-a4,-(sp) ;save regs used
-
- movea.l 36(sp),a0 ;a0 = PInfo
- move.l 40(sp),d0 ;d0 = y
- movea.l 44(sp),a1 ;a1 = ptr
- movea.l 48(sp),a2 ;a2 = colors
-
- moveq.l #3,d2
- and.w d0,d2 ;d2 = y & 3
- lsl.w #2,d2 ;d2 = (y & 3) << 2
- movea.l pi_dmatrix(a0),a3 ;a3 = dmatrix
- adda.l d2,a3 ;a3 = dmatrix + ((y & 3) << 2)
-
- movea.l _PD,a4
- cmpi.w #SHADE_COLOR,pd_Preferences+pf_PrintShade(a4) ;color dump?
- bne not_color ;no
-
- color:
- ; a0 - PInfo
- ; a1 - ptr
- ; a2 - colors
- ; a3 - dmatrix ptr
- ; d0 - y
-
- movem.l d7/a5,-(sp) ;save regs used
-
- movea.l a1,a4
- movea.l a1,a5
- adda.w (a2)+,a1 ;a1 = ptr + colors[0] (yptr)
- adda.w (a2)+,a4 ;a4 = ptr + colors[1] (mptr)
- adda.w (a2)+,a5 ;a5 = ptr + colors[2] (cptr)
-
- movea.l pi_ColorInt(a0),a2 ;a2 = ColorInt ptr
- move.w pi_width(a0),width ;# of pixels to do
- move.w pi_xpos(a0),d2 ;d2 = x
- movea.l pi_ScaleX(a0),a0 ;a0 = ScaleX (sxptr)
-
- ; a0 - sxptr
- ; a1 - yptr
- ; a2 - ColorInt ptr
- ; a3 - dmatrix ptr
- ; a4 - mptr
- ; a5 - cptr
- ; d0 - byte to set (x >> 3)
- ; d1 - sx
- ; d2 - x
- ; d3 - dvalue (dmatrix[x & 3])
- ; d4 - Yellow
- ; d5 - Magenta
- ; d6 - Cyan
- ; d7 - bit to set
-
- cwidth_loop:
- move.b PCMYELLOW(a2),d4 ;d4 = Yellow
- move.b PCMMAGENTA(a2),d5 ;d5 = Magenta
- move.b PCMCYAN(a2),d6 ;d6 = Cyan
- addq.l #ce_SIZEOF,a2 ;advance to next entry
-
- move.w (a0)+,d1 ;d1 = # of times to use this pixel (sx)
- subq.w #1,d1 ;adjust for dbra
-
- csx_loop:
- moveq.l #3,d3
- and.w d2,d3 ;d3 = x & 3
- move.b 0(a3,d3.w),d3 ;d3 = dmatrix[x & 3]
-
- move.w d2,d0
- lsr.w #3,d0 ;compute byte to set
- move.w d2,d7
- not.w d7 ;compute bit to set
-
- yellow:
- cmp.b d3,d4 ;render yellow pixel?
- ble.s magenta ;no.
- bset.b d7,0(a1,d0.w) ;*(ptr + x >> 3) |= 2 ^ x
-
- magenta:
- cmp.b d3,d5 ;render magenta pixel?
- ble.s cyan ;no.
- bset.b d7,0(a4,d0.w) ;*(ptr + x >> 3) |= 2 ^ x
-
- cyan:
- cmp.b d3,d6 ;render cyan pixel?
- ble.s csx_end ;no, skip to next pixel.
- bset.b d7,0(a5,d0.w) ;*(ptr + x >> 3) |= 2 ^ x
-
- csx_end
- addq.w #1,d2 ;x++
- dbra d1,csx_loop ;sx--
- subq.w #1,width ;width--
- bne.s cwidth_loop
- movem.l (sp)+,d7/a5 ;restore regs used
- bra exit
-
- not_color:
- ; a0 - PInfo
- ; a1 - ptr
- ; a2 - colors
- ; a3 - dmatrix ptr
- ; d0 - y
-
- adda.w (a2),a1 ;a1 = ptr + colors[0]
- move.w pi_width(a0),d1 ;d1 = width
- subq.w #1,d1 ;adjust for dbra
-
- move.w pi_threshold(a0),d3 ;d3 = threshold, thresholding?
- beq.s grey_scale ;no, grey-scale
-
- threshold:
- ; a0 - PInfo
- ; a1 - ptr
- ; d0 - y
- ; d1 - width
- ; d3 - threshold
-
- eori.b #15,d3 ;d3 = dvalue
- movea.l pi_ColorInt(a0),a2 ;a2 = ColorInt ptr
- move.w pi_xpos(a0),d2 ;d2 = x
- movea.l pi_ScaleX(a0),a0 ;a0 = ScaleX (sxptr)
-
- ; a0 - sxptr
- ; a1 - ptr
- ; a2 - ColorInt ptr
- ; a3 - dmatrix ptr (NOT USED)
- ; d0 - byte to set (x >> 3)
- ; d1 - width
- ; d2 - x
- ; d3 - dvalue
- ; d4 - Black
- ; d5 - sx
- ; d6 - bit to set
-
- twidth_loop:
- move.b PCMBLACK(a2),d4 ;d4 = Black
- addq.l #ce_SIZEOF,a2 ;advance to next entry
-
- move.w (a0)+,d5 ;d5 = # of times to use this pixel (sx)
-
- cmp.b d3,d4 ;render this pixel?
- ble.s tsx_end ;no, skip to next pixel.
- subq.w #1,d5 ;adjust for dbra
-
- tsx_render: ;yes, render this pixel sx times
- move.w d2,d0
- lsr.w #3,d0 ;compute byte to set
- move.w d2,d6
- not.w d6 ;compute bit to set
- bset.b d6,0(a1,d0.w) ;*(ptr + x >> 3) |= 2 ^ x
-
- addq.w #1,d2 ;x++
- dbra d5,tsx_render ;sx--
- dbra d1,twidth_loop ;width--
- bra.s exit ;all done
-
- tsx_end:
- add.w d5,d2 ;x += sx
- dbra d1,twidth_loop ;width--
- bra.s exit
-
- grey_scale:
- ; a0 - PInfo
- ; a1 - ptr
- ; d0 - y
- ; d1 - width
-
- movea.l pi_ColorInt(a0),a2 ;a2 = ColorInt ptr
- move.w pi_xpos(a0),d2 ;d2 = x
- movea.l pi_ScaleX(a0),a0 ;a0 = ScaleX (sxptr)
-
- ; a0 - sxptr
- ; a1 - ptr
- ; a2 - ColorInt ptr
- ; a3 - dmatrix ptr
- ; d0 - byte to set (x >> 3)
- ; d1 - width
- ; d2 - x
- ; d3 - dvalue (dmatrix[x & 3])
- ; d4 - Black
- ; d5 - sx
- ; d6 - bit to set
-
- gwidth_loop:
- move.b PCMBLACK(a2),d4 ;d4 = Black
- addq.l #ce_SIZEOF,a2 ;advance to next entry
-
- move.w (a0)+,d5 ;d5 = # of times to use this pixel (sx)
- subq.w #1,d5 ;adjust for dbra
-
- gsx_loop:
- moveq.l #3,d3
- and.w d2,d3 ;d3 = x & 3
- move.b 0(a3,d3.w),d3 ;d3 = dmatrix[x & 3]
-
- cmp.b d3,d4 ;render this pixel?
- ble.s gsx_end ;no, skip to next pixel.
-
- move.w d2,d0
- lsr.w #3,d0 ;compute byte to set
- move.w d2,d6
- not.w d6 ;compute bit to set
- bset.b d6,0(a1,d0.w) ;*(ptr + x >> 3) |= 2 ^ x
-
- gsx_end
- addq.w #1,d2 ;x++
- dbra d5,gsx_loop ;sx--
- dbra d1,gwidth_loop ;width--
-
- exit:
- movem.l (sp)+,d2-d6/a2-a4 ;restore regs used
- moveq.l #0,d0 ;flag all ok
- rts ;goodbye
-
- width dc.w 0
-
- END
-