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- *
- * Copyright (c) 1992 Commodore-Amiga, Inc.
- *
- * This example is provided in electronic form by Commodore-Amiga, Inc. for
- * use with the "Amiga ROM Kernel Reference Manual: Devices", 3rd Edition,
- * published by Addison-Wesley (ISBN 0-201-56775-X).
- *
- * The "Amiga ROM Kernel Reference Manual: Devices" contains additional
- * information on the correct usage of the techniques and operating system
- * functions presented in these examples. The source and executable code
- * of these examples may only be distributed in free electronic form, via
- * bulletin board or as part of a fully non-commercial and freely
- * redistributable diskette. Both the source and executable code (including
- * comments) must be included, without modification, in any copy. This
- * example may not be published in printed form or distributed with any
- * commercial product. However, the programming techniques and support
- * routines set forth in these examples may be used in the development
- * of original executable software products for Commodore Amiga computers.
- *
- * All other rights reserved.
- *
- * This example is provided "as-is" and is subject to change; no
- * warranties are made. All use is at your own risk. No liability or
- * responsibility is assumed.
- *
- **********************************************************************
- *
- * Transfer routine for HP_LaserJet
- *
- **********************************************************************
-
- 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
- ;
-
- movem.l d2-d6/a2-a3,-(sp) ;save regs used
-
- movea.l 32(sp),a0 ;a0 = PInfo
- move.l 36(sp),d0 ;d0 = y
- movea.l 40(sp),a1 ;a1 = ptr
-
- 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
- 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)
- 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-a3 ;restore regs used
- moveq.l #0,d0 ;flag all ok
- rts ;goodbye
-
- END
-