freebsd-skq/share/examples/bootforth/frames.4th
1999-08-28 00:22:10 +00:00

91 lines
1.7 KiB
Forth

\ Words implementing frame drawing
\ XXX Filled boxes are left as an exercise for the reader... ;-/
\ $FreeBSD$
marker task-frames.4th
variable h_el
variable v_el
variable lt_el
variable lb_el
variable rt_el
variable rb_el
variable fill
\ Single frames
196 constant sh_el
179 constant sv_el
218 constant slt_el
192 constant slb_el
191 constant srt_el
217 constant srb_el
\ Double frames
205 constant dh_el
186 constant dv_el
201 constant dlt_el
200 constant dlb_el
187 constant drt_el
188 constant drb_el
\ Fillings
0 constant fill_none
32 constant fill_blank
176 constant fill_dark
177 constant fill_med
178 constant fill_bright
: hline ( len x y -- ) \ Draw horizontal single line
at-xy \ move cursor
0 do
h_el @ emit
loop
;
: f_single ( -- ) \ set frames to single
sh_el h_el !
sv_el v_el !
slt_el lt_el !
slb_el lb_el !
srt_el rt_el !
srb_el rb_el !
;
: f_double ( -- ) \ set frames to double
dh_el h_el !
dv_el v_el !
dlt_el lt_el !
dlb_el lb_el !
drt_el rt_el !
drb_el rb_el !
;
: vline ( len x y -- ) \ Draw vertical single line
2dup 4 pick
0 do
at-xy
v_el @ emit
1+
2dup
loop
2drop 2drop drop
;
: box ( w h x y -- ) \ Draw a box
2dup 1+ 4 pick 1- -rot
vline \ Draw left vert line
2dup 1+ swap 5 pick + swap 4 pick 1- -rot
vline \ Draw right vert line
2dup swap 1+ swap 5 pick 1- -rot
hline \ Draw top horiz line
2dup swap 1+ swap 4 pick + 5 pick 1- -rot
hline \ Draw bottom horiz line
2dup at-xy lt_el @ emit \ Draw left-top corner
2dup 4 pick + at-xy lb_el @ emit \ Draw left bottom corner
2dup swap 5 pick + swap at-xy rt_el @ emit \ Draw right top corner
2 pick + swap 3 pick + swap at-xy rb_el @ emit
2drop
;
f_single
fill_none fill !