876 lines
14 KiB
Plaintext
876 lines
14 KiB
Plaintext
makefile
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# Copyright (C) Manx Software Systems, Inc. 1987. All rights reserved.
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# Note: the object files below are in the correct order for linking,
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# thus the OBJ macro should be changed with caution. If you are in doubt,
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# use the ORD utility to build a correctly ordered list.
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OBJ=mode.o circ.o lin.o point.o address.o scr_call.o
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CC=cc
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AS=as
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MODEL=
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AMODEL=0
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.c.o:
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$(CC) +$(MODEL) -n $*.c -o $@
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sqz $@
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.asm.o:
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$(AS) -dMODEL=$(AMODEL) $*.asm -o $@
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sqz $@
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$(DIR)g$(MODEL).lib: $(OBJ)
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del $(DIR)g$(MODEL).lib
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lb $(DIR)g$(MODEL).lib $(OBJ)
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@echo graphics done
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address.asm
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; Copyright (C) 1984 by Manx Software Systems, Inc.
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; :ts=8
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dataseg segment word public 'data'
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public $address
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$address equ this word ;/* vertical address table */
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dw 7920+8192
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dw 7920
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dw 7840+8192
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dw 7840
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dw 7760+8192
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dw 7760
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dw 7680
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dw 7600+8192
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dw 7600
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dw 7520
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dw 7440
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dw 7360
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dw 7280
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dw 7200+8192
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dw 7200
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dw 7120+8192
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dw 7120
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dw 7040
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dw 6960
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dw 6880
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dw 6800
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dw 6720
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dw 6640
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dw 6560
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dw 6480
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dw 6320
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dw 5760
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dw 5680
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dw 5600
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dw 5520
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dw 5440
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dw 5360
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dw 5280
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dw 5200
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dw 5120
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dw 4960
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dw 4080
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dw 4000
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dw 3280
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dw 3200
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dw 3120
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dw 1920
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dw 1840
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dw 1680
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dw 1600
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dw 1520
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dw 1440
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dw 1360
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dw 1280
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dw 1200+8192
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dw 1200
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dw 1120+8192
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dw 1120
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dw 1040
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dw 960
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dw 880
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dw 800
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dw 720+8192
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dw 720
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dw 640+8192
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dw 640
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dw 560+8192
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dw 560
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dw 480+8192
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dw 480
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dw 400+8192
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dw 400
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dw 320+8192
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dw 320
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dw 240+8192
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dw 240
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dw 160+8192
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dw 160
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dw 80+8192
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dw 80
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dw 0+8192
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dw 0
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dataseg ends
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end
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circ.asm
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; Copyright (C) 1984 by Manx Software Systems, Inc.
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; :ts=8
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include lmacros.h
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dataseg segment word public 'data'
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aldx dw 0
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aldy dw 0
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public _yaspect_,_xaspect_
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_yaspect_ dw 5
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_xaspect_ dw 6
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scale dw 1024
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scale2 dw 512
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aspect dw 0 ;function computed aspect (scaled)
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invasp dw 0 ;reciprocal of aspect (scaled too)
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xorg dw 0
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yorg dw 0
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radius dw 0
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dataseg ends
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assume ds:dataseg
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;--------------------------------------------------------
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;procedure circle(x,y,radius)
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;
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;draws a circle at center (x,y) with aspect ratio
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;yaspect/xaspect; radius in column units
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;
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;Dan Lee 7/1/1982 SourceWare
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;Modified from DDJ May '83 for CI C-86 by Davin 6/22/1983
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;remodified for Aztec C86, 6/84
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;
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;--------------------------------------------------------
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ifdef FARPROC
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extrn $inline:far,$pnt:far
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else
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extrn $inline:near,$pnt:near
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endif
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procdef set_asp,<<x_asp,word>,<y_asp,word>>
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;set_asp (x_aspect, y_aspect);
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mov ax, x_asp
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mov [_xaspect_],ax
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mov ax, y_asp
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mov [_yaspect_],ax
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pret
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pend set_asp
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procdef circle,<<_xorg,word>,<_yorg,word>,<irad,word>>
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mov cx,_xorg
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mov [xorg],cx
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mov dx,_yorg
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mov [yorg],dx
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mov ax,irad
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pop bp
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push es
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push si
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push di ;save register variables
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or ax,ax
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jnz okrad
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jmp single
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okrad: mov [radius],ax
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mov ax,_yaspect_ ;get yaspect
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mul [scale] ;ax=yaspect*scale
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shl ax,1
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div _xaspect_ ;ax=(yaspect*scale)/xaspect
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inc ax
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shr ax,1
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mov [aspect],ax ;store aspect*scale
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mov ax,_xaspect_ ;get xaspect in ax
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mul [scale] ;ax=xaspect*scale
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shl ax,1
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div _yaspect_ ;ax=(xaspect*scale)/yaspect
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inc ax
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shr ax,1
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mov [invasp],ax ;store inv aspect*scale
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;
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; Plot 0 to 45 degrees.
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; Increase y by one unit and
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; decrease x by TAN units*inv aspect ratio.
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;
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mov ax,[radius] ;get radius for initial x
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mul [scale] ;ax=radius*scale
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xor di,di ;zero initial y value
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nlp1: push ax ;save lo word x*scale
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push dx ;save hi word x*scale
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add ax,[scale2]
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adc dx,0
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div [scale]
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mov [aldx],ax ; aldx,aldy are old relative coord's
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mov [aldy],di
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pop dx
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pop ax
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lp1: push ax ;save lo word x*scale
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push dx ;save hi word x*scale
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add ax,[scale2]
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adc dx,0
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div [scale]
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mov bx,ax ;bx=1st quad x
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add ax,[xorg] ;add x origin
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push bp
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push di ;relative y-coord
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push bx ;relative x-coord
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mov bp,sp
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mov bx,[yorg] ;get y origin
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sub bx,di ;and sub y to plot
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call pnt1
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pop cx ;1st quad x val
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pop di
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mov [aldx],cx
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mov [aldy],di
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pop bp
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;cx = 1st quad x, di = 1st quad y
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inc di ;get new y
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mov ax,di ;ax=y
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mul [invasp] ;ax=y*inv aspect*scale
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div cx ;ax=TAN*inv aspect*scale
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xor dx,dx ;zero remainder
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mov si,ax ;si=TAN*inv aspect*scale
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div [invasp] ;ax=TAN
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cmp ax,1 ;TAN=1?
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pop dx ;dx=hi word x*scale
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pop ax ;ax=lo word x*scale
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jae part2 ;yes, go to next sector
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neg si ;to decrement x
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add ax,si ;new x value
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adc dx,-1 ;hi word carry
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jmp short lp1 ;plot new point
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;
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; Plot 45 to 90 degrees.
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; Decrease x by one unit and
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; increase y by COT units*aspect ratio.
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;
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part2: mov ax,di ;get next y to plot
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mul [scale] ;dx:ax=y*scale
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mov di,cx ;di=last x value
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dec di ;next x to plot
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lp2: push ax ;save lo word y*scale
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push dx ;save hi word y*scale
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add ax,[scale2] ;'one-half'
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adc dx,0
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div [scale] ;ax=y
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mov bx,ax ;bx=1st quad y co-ord
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add ax,[yorg] ;add y origin
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mov cx,[xorg] ;cx=x origin
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add cx,di ;x to plot
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push bp
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push bx
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push di
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mov bp,sp
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mov bx,ax
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mov ax,cx
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call pnt2
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pop di
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pop bx
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mov [aldx],di
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mov [aldy],bx
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pop bp
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or di,di ;90 degrees?
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js exit ;yes, exit
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dec di ;get new x
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mov ax,di ;ax=x
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imul [aspect] ;ax=x*aspect*scale
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idiv bx ;ax=COT*aspect*scale
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mov si,ax ;si=change in y
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pop dx ;dx=hi word y*scale
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pop ax ;ax=lo word y*scale
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xor bx,bx
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or si,si ;for sign check
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jns skp ;positive
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mov bx,-1 ;negative carry
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skp: add ax,si ;ax=new x value
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adc dx,bx
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jmp short lp2 ;plot next point
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exit: add sp,4 ;release parms
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jmp alldone
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pnt1 proc near
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;bp points to rel x coord and bp+2 points to rel y coord
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;abs coords of point are in ax,bx
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mov si,[aldx]
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add si,[xorg] ;si is old abs x
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mov di,[yorg]
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mov cx,[aldy]
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sub di,cx ;di is old abs y
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call $goinline ;write 1st quad point
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sub ax,word ptr [bp] ;get 2nd quad x+origin
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sub ax,word ptr [bp]
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sub si,[aldx]
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sub si,[aldx]
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call $goinline ;write 2nd quad point
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add bx,word ptr 2[bp] ;get 3rd quad y+origin
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add bx,word ptr 2[bp]
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add di,[aldy]
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add di,[aldy]
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call $goinline ;write 3rd quad point
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add ax,word ptr [bp]
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add ax,word ptr [bp] ;get 4th quad x+origin
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add si,[aldx]
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add si,[aldx]
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call $goinline ;plot 4th quad point
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ret
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pnt1 endp
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pnt2 proc near
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mov si,[aldx]
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add si,[xorg]
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mov di,[yorg]
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add di,[aldy]
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call $goinline ;write 1st quad point
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sub ax,word ptr [bp] ;get 2nd quad x+origin
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sub ax,word ptr [bp]
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sub si,[aldx]
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sub si,[aldx]
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call $goinline ;write 2nd quad point
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sub bx,word ptr 2[bp] ;get 3rd quad y+origin
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sub bx,word ptr 2[bp]
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sub di,[aldy]
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sub di,[aldy]
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call $goinline ;write 3rd quad point
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add ax,word ptr [bp]
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add ax,word ptr [bp] ;get 4th quad x+origin
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add si,[aldx]
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add si,[aldx]
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call $goinline ;plot 4th quad point
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ret
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pnt2 endp
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single:
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mov si,cx
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mov di,dx
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call $pnt
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alldone:
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pop di
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pop si
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pop es
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ret
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$goinline proc near
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push ax
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push bx
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push si
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push di
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call $inline ;pops es,di,si
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pop di
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pop si
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pop bx
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pop ax
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ret
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$goinline endp
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pend circle
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finish
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end
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lin.asm
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; Copyright (C) 1984 by Manx Software Systems, Inc.
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; :ts=8
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include lmacros.h
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dataseg segment word public 'data'
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extrn _oldx_:word, _oldy_:word
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deltax dw 0
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deltay dw 0
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yincr dw 0
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dataseg ends
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assume ds:dataseg
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ifdef FARPROC
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extrn $pnt:far
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else
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extrn $pnt:near
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endif
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public $inline
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$inline proc
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cmp si,ax
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jbe noxchg
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xchg si,ax
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xchg di,bx
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noxchg:
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jne novert
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jmp vertical
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novert:
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sub ax,si
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mov [deltax],ax
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sub bx,di
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jnz nohoriz
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jmp horizontal
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nohoriz:
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mov cx,1
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jns notneg
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neg cx
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neg bx
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notneg: mov [yincr],cx
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mov [deltay],bx
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cmp ax,bx
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jg case2
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mov dx,[deltax]
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shl dx,1
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mov bx,dx
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mov ax,[deltay]
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shl ax,1
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sub bx,ax
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mov ax,dx
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sub ax,[deltax]
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mov cx,[deltay]
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lp1: dec cx
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js done
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call $pnt
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add di,[yincr]
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cmp ax,0
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jl incr1
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inc si
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add ax,bx
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jmp short lp1
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incr1:
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add ax,dx
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jmp short lp1
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case2:
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mov dx,[deltay]
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shl dx,1 ;dx <- 2 * deltay
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mov bx,dx
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mov ax,[deltax]
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shl ax,1
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sub bx,ax ;bx <- 2*deltay - 2 * deltax
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mov ax,dx
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sub ax,[deltax] ;ax <- 2*deltay - deltax
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mov cx,[deltax]
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lp2: dec cx
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js done
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call $pnt
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inc si
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cmp ax,0
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jl incr2
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add di,[yincr]
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add ax,bx
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jmp short lp2
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incr2:
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add ax,dx
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jmp short lp2
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vertical: ;si = xval, di,bx = yvals
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cmp di,bx
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jle yorder
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xchg bx,di
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yorder:
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sub bx,di
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vplot:
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call $pnt
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inc di
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dec bx
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||
jns vplot
|
||
jmp short done
|
||
|
||
horizontal: ;ax=deltax, si,di = start point
|
||
call $pnt
|
||
inc si
|
||
dec ax
|
||
jns horizontal
|
||
;jmp short done
|
||
|
||
done:
|
||
ret
|
||
$inline endp
|
||
|
||
procdef lineto,<<xdest,word>,<ydest,word>>
|
||
|
||
; lineto (dest_x, dest_y);
|
||
push si
|
||
push di
|
||
push es
|
||
mov si,[_oldx_]
|
||
mov di,[_oldy_]
|
||
mov ax,xdest
|
||
mov bx,ydest
|
||
mov [_oldx_],ax
|
||
mov [_oldy_],bx
|
||
call $inline ;pops si,di,es before returning
|
||
pop es
|
||
pop di
|
||
pop si
|
||
pret
|
||
pend lineto
|
||
|
||
procdef line,<<srcx,word>,<srcy,word>,<ddstx,word>,<ddsty,word>>
|
||
; line (src_x, src_y, dest_x, dest_y);
|
||
push si
|
||
push di
|
||
push es
|
||
mov si,srcx
|
||
mov di,srcy
|
||
mov ax,ddstx
|
||
mov bx,ddsty
|
||
mov [_oldx_],ax
|
||
mov [_oldy_],bx
|
||
call $inline
|
||
pop es
|
||
pop di
|
||
pop si
|
||
pret
|
||
pend line
|
||
finish
|
||
end
|
||
mode.c
|
||
/* Copyright (C) 1984 by Manx Software Systems, Inc. */
|
||
|
||
extern int _maxx;
|
||
extern int _xaspect, _yaspect;
|
||
extern char _color;
|
||
extern int _plotf,_plottbl[];
|
||
|
||
mode (val)
|
||
{
|
||
switch (val) {
|
||
case 'l': case 'L': case 3:
|
||
scr_call (3);
|
||
break;
|
||
case 'm': case 'M': case 4:
|
||
_plotf = _plottbl[0];
|
||
_xaspect = 6;
|
||
_yaspect = 5;
|
||
_maxx = 319;
|
||
scr_call (4);
|
||
break;
|
||
case 'h': case 'H': case 6:
|
||
_plotf = _plottbl[1];
|
||
_xaspect = 4;
|
||
_yaspect = 1;
|
||
_maxx = 639;
|
||
scr_call (6);
|
||
break;
|
||
default:
|
||
if (val < 0 || val > 6)
|
||
return;
|
||
scr_call (val);
|
||
break;
|
||
}
|
||
}
|
||
|
||
color (c)
|
||
{
|
||
switch (c) {
|
||
case 'w': case 'W': case 'y': case 'Y': case 3:
|
||
_color = 3;
|
||
break;
|
||
case 'm': case 'M': case 'r': case 'R': case 2:
|
||
_color = 2;
|
||
break;
|
||
case 'c': case 'C': case 'g': case 'G': case 1:
|
||
_color = 1;
|
||
break;
|
||
default:
|
||
_color = 0;
|
||
break;
|
||
}
|
||
}
|
||
|
||
palette (c)
|
||
{
|
||
if (c)
|
||
scr_call (11 << 8,1<<8 | 1,0,0);
|
||
else
|
||
scr_call (11 << 8,1<<8 | 0,0,0);
|
||
}
|
||
|
||
ground (c)
|
||
{
|
||
scr_call (11 << 8, 0 << 8 | c,0,0);
|
||
}
|
||
point.asm
|
||
; Copyright (C) 1984 by Manx Software Systems, Inc.
|
||
; :ts=8
|
||
include lmacros.h
|
||
dataseg segment para public 'data'
|
||
|
||
extrn $address:word
|
||
public _oldx_,_oldy_,_color_,_maxx_
|
||
_oldx_ dw 0
|
||
_oldy_ dw 0
|
||
_color_ db 1
|
||
_maxx_ dw 320
|
||
public _plotf_, _plottbl_
|
||
public mid,ultra
|
||
public clrmsk,colmsk
|
||
|
||
clrmsk db 00111111b,11001111b,11110011b,11111100b
|
||
;/* clrmsk for point mode 0 */
|
||
|
||
onmask db 10000000b,1000000b,100000b,10000b,1000b,100b,10b,1b
|
||
offmask db 01111111b,10111111b,11011111b,11101111b
|
||
db 11110111b,11111011b,11111101b,11111110b
|
||
|
||
colmsk db 0,0,0,0 ;/* color_ masks */
|
||
db 1000000b,10000b,100b,1
|
||
db 10000000b,100000b,1000b,10b
|
||
db 11000000b,110000b,1100b,11b
|
||
|
||
_plottbl_ dw offset mid ;medium res
|
||
dw offset ultra ;high res
|
||
|
||
_plotf_ dw offset ptquit
|
||
|
||
dataseg ends
|
||
assume ds:dataseg,cs:codeseg
|
||
|
||
public $pnt
|
||
$pnt proc
|
||
cmp si,[_maxx_] ;si=x,di=y does not set oldx & oldy
|
||
ja quit
|
||
cmp si,0
|
||
jb quit
|
||
cmp di,199
|
||
ja quit
|
||
cmp di,0
|
||
jnb $pnt3
|
||
jmp quit
|
||
$pnt3:
|
||
push ax
|
||
push bx
|
||
mov bl,[_color_] ;entry #3 si=x,di=y no clipping !
|
||
$pnt4:
|
||
mov bh,0
|
||
;entry #5 si=x,di=y,bx=color_
|
||
;
|
||
$pnt5: mov ax,0b800h ; set es to point to hires segment
|
||
mov es,ax
|
||
push di
|
||
shl di,1 ;mult y*2 (addr table is 2 bytes wide)
|
||
jmp [_plotf_] ;jmp to ptquit, mid or ultra
|
||
|
||
mid: push si
|
||
|
||
mov di,$address[di] ;get vert address from table
|
||
|
||
mov ax,si ;save x in si
|
||
|
||
and si,3
|
||
shr ax,1 ;divide by 4 (4 dots per byte)
|
||
shr ax,1
|
||
|
||
add di,ax ;get addr of byte on screen
|
||
|
||
sal bl,1 ; color_ table is 4 by 4 so mult color_ * 4
|
||
sal bl,1
|
||
mov bl,colmsk[si+bx]
|
||
mov al,clrmsk[si]
|
||
and es:[di],al
|
||
or es:[di],bl
|
||
pop si
|
||
ptquit: pop di
|
||
pop bx
|
||
pop ax
|
||
quit:
|
||
ret
|
||
|
||
ultra: mov di,$address[di]
|
||
mov ax,si
|
||
push si
|
||
and si,7
|
||
shr ax,1
|
||
shr ax,1
|
||
shr ax,1
|
||
add di,ax
|
||
or bl,bl
|
||
jz black
|
||
mov al,onmask[si]
|
||
or es:[di],al
|
||
pop si
|
||
jmp short ptquit
|
||
black: mov al,offmask[si]
|
||
and es:[di],al
|
||
pop si
|
||
jmp short ptquit
|
||
|
||
|
||
procdef point,<<xcoord,word>,<ycoord,word>>
|
||
|
||
push si
|
||
push di
|
||
push es
|
||
mov si,xcoord
|
||
mov di,ycoord
|
||
|
||
mov [_oldx_],si ;si=x,di=y sets oldx and oldy
|
||
mov [_oldy_],di
|
||
call $pnt
|
||
|
||
pop es
|
||
pop di
|
||
pop si
|
||
pret
|
||
pend point
|
||
finish
|
||
end
|
||
scr_call.asm
|
||
; Copyright (C) 1984 by Manx Software Systems
|
||
; :ts=8
|
||
include lmacros.h
|
||
;
|
||
; scr_call(ax,bx,cx,dx) - issue int 10 with ax,... set to args
|
||
;
|
||
;
|
||
procdef scr_call,<<aax,word>,<bbx,word>,<ccx,word>,<ddx,word>>
|
||
push si
|
||
push di
|
||
mov ax,aax
|
||
mov bx,bbx
|
||
mov cx,ccx
|
||
mov dx,ddx
|
||
int 10h
|
||
pop di
|
||
pop si
|
||
pret
|
||
pend scr_call
|
||
finish
|
||
end
|
||
|