0 ilo + graphics extensions 1 2 ilo/g is an ilo with support for simple monochrome graphics. 3 4 This provides a monochrome, bitmap display with support for 5 the (termina) vocabulary. The extensions here provide a word 6 for drawing pixels, and later other shapes. 7 8 To load: 9 10 * crc:drawing 11 12 13 14 15 save next new 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 save next new 0 (crc:drawing) (interface-to-framebuffer) 1 2 :pixel (xyc-) #33 io ; 3 :get-pixel (xy-c) #34 io ; 4 5 :mouse (-xyb) #35 io ; 6 7 8 9 10 11 12 13 14 15 save next new 0 (crc:drawing) (simple-lines) 1 2 #1 'Color var-n 3 :set-color (n-) !Color ; 4 5 :hline (xyw-) 6 [ dup-pair @Color pixel &n:inc dip ] times drop-pair ; 7 8 :vline (xyh-) 9 [ dup-pair @Color pixel n:inc ] times drop-pair ; 10 11 :dline\ (xyl-) 12 [ dup-pair @Color pixel &n:inc bi@ ] times drop-pair ; 13 14 :dline/ (xyl-) 15 [ dup-pair @Color pixel &n:dec &n:inc bi* ] times drop-pair ; save next new 0 (crc:drawing) (rect) 1 2 'X var 'Y var 'H var 'W var 3 4 :rect (xyhw-) !W !H !Y !X 5 @X @Y @W hline @X @Y @H n:add @W hline 6 @X @Y @H vline @X @W n:add @Y @H vline 7 ; 8 9 10 11 12 13 14 15 save next new 0 (crc:drawing) (circles) 1 2 'XC var 'YC var 'X var 'Y var 3 4 :octant (xc,yc,x,y) 5 !Y !X !YC !XC 6 @XC @X n:add @YC @Y n:add @Color pixel 7 @XC @X n:sub @YC @Y n:add @Color pixel 8 @XC @X n:add @YC @Y n:sub @Color pixel 9 @XC @X n:sub @YC @Y n:sub @Color pixel 10 @XC @Y n:add @YC @X n:add @Color pixel 11 @XC @Y n:sub @YC @X n:add @Color pixel 12 @XC @Y n:add @YC @X n:sub @Color pixel 13 @XC @Y n:sub @YC @X n:sub @Color pixel ; 14 15 save next new 0 (crc:drawing) (circles) 1 2 'XC var 'YC var 'X var 'Y var 'D var 'R var 3 4 :circle (xyr-) 5 !R !YC !XC #0 !X @R [ !Y ] [ !D ] bi 6 @XC @YC @X @Y octant 7 [ &X v:inc 8 @D n:strictly-positive? 9 [ &Y v:dec @X @Y n:sub @R n:mul #2 n:mul @D n:add !D ] 10 [ #2 @R n:mul @X n:mul @D n:add !D ] choose 11 @XC @YC @X @Y octant 12 @Y @X gteq? ] while ; 13 14 15 save next new 0 (crc:drawing) (line) 1 2 'X var 'Y var 'DX var 'DY var 'SX var 'SY var 'ROT var 3 'T var 'S var 'A var 'E var 'B var 4 'X1 var 'Y1 var 'X2 var 'Y2 var 5 6 :~setup (xy,xy-) 7 !Y2 !X2 !Y1 !X1 @X1 !X @Y1 !Y 8 @X2 @X1 n:sub n:abs !DX @Y2 @Y1 n:sub n:abs !DY 9 @X2 @X1 n:sub n:sign !SX 10 @Y2 @Y1 n:sub n:sign !SY 11 @DY @DX gt? n:abs !ROT 12 @ROT [ @DX !T @DY !S ] [ @DY !T @DX !S ] choose 13 @T #1 shift-left !A @A @S n:sub !E 14 @T @S n:sub #1 shift-left !B ; 15 save next new 0 (crc:drawing) (line) 1 2 :line (x1,y1,x2,y2-) 3 ~setup @X @Y @Color pixel 4 @S [ 5 @E n:positive? [ @B ] [ @A ] choose @E n:add !E 6 @E n:positive? @ROT or [ @SY ] [ #0 ] choose @Y n:add !Y 7 @E n:positive? @ROT not or [ @SX ] [ #0 ] choose @X n:add !X 8 @X @Y @Color pixel 9 ] times ; 10 11 12 13 14 15 save next new 0 (crc:drawing) (triangle) 1 2 :triangle (x1,y1,x2,y2,x3,y3-) 3 'abcdef 'abcdefabcd reorder line 4 'abcdef 'abcdefefcd reorder line 5 'abcdef 'abef reorder line ; 6 7 8 9 10 11 12 13 14 15 save next new 0 (crc:turtle) 1 2 'X var 'Y var 'C var 'D var 'R var 3 4 :t:raise #0 !C ; 5 :t:lower #1 !C ; 6 7 :t:left [ &X v:dec ] !D ; 8 :t:right [ &X v:inc ] !D ; 9 :t:up [ &Y v:dec ] !D ; 10 :t:down [ &Y v:inc ] !D ; 11 :t:at (xy-) !Y !X ; 12 :t:forward (n-) [ @X @Y @C pixel @D call ] times ; 13 14 #320 #240 t:at t:lower t:right 15 save next new 0 (crc:turtle) 1 2 :t:down-right [ &Y v:inc &X v:inc ] !D ; 3 :t:down-left [ &Y v:inc &X v:dec ] !D ; 4 :t:up-left [ &Y v:dec &X v:dec ] !D ; 5 :t:up-right [ &Y v:dec &X v:inc ] !D ; 6 7 'Rotations d:create #8 comma 8 &t:right comma &t:down-right comma &t:down comma 9 &t:down-left comma &t:left comma &t:up-left comma 10 &t:up comma &t:up-right comma 11 12 :t:rotate 13 &R v:inc @R #8 eq? [ #0 !R ] if &Rotations @R a:fetch call ; 14 15 save next new 0 '(LOAD:crc:turtle) 1 2 '(crc:turtle) needs 3 4 5 6 7 8 9 10 11 12 13 14 15 save next new 0 (ilo/x) 1 2 #20 [ #0 #0 #300 #300 I #10 n:mul n:sub line ] indexed-times 3 #20 [ #639 #0 #300 #300 I #10 n:mul n:sub line ] indexed-times 4 5 #300 #240 #100 circle 6 7 8 9 10 11 12 13 14 15 save next new 0 (ilo/x) 1 2 #300 'X var-n #200 'Y var-n #50 'R var-n 3 :test 4 [ c:get #0 set-color 5 @X @Y @R circle 6 dup $c eq? [ &X v:dec ] if 7 dup $t eq? [ &X v:inc ] if 8 dup $h eq? [ &Y v:dec ] if 9 dup $n eq? [ &Y v:inc ] if 10 dup $. eq? [ restart ] if 11 dup $p eq? [ &R v:inc ] if 12 dup $y eq? [ &R v:dec ] if 13 drop #1 set-color @X @Y @R circle ] forever 14 ; 15 save next new 0 (LOAD:crc:drawing) 1 2 '(crc:drawing) needs 3 4 5 6 7 8 9 10 11 12 13 14 15 save next new