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