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1(* Kitty Graphics Protocol - Unicode Placeholders *)
2
3let placeholder_char = Uchar.of_int 0x10EEEE
4
5let diacritics =
6 [|
7 0x0305; 0x030D; 0x030E; 0x0310; 0x0312; 0x033D; 0x033E; 0x033F; 0x0346;
8 0x034A; 0x034B; 0x034C; 0x0350; 0x0351; 0x0352; 0x0357; 0x035B; 0x0363;
9 0x0364; 0x0365; 0x0366; 0x0367; 0x0368; 0x0369; 0x036A; 0x036B; 0x036C;
10 0x036D; 0x036E; 0x036F; 0x0483; 0x0484; 0x0485; 0x0486; 0x0487; 0x0592;
11 0x0593; 0x0594; 0x0595; 0x0597; 0x0598; 0x0599; 0x059C; 0x059D; 0x059E;
12 0x059F; 0x05A0; 0x05A1; 0x05A8; 0x05A9; 0x05AB; 0x05AC; 0x05AF; 0x05C4;
13 0x0610; 0x0611; 0x0612; 0x0613; 0x0614; 0x0615; 0x0616; 0x0617; 0x0657;
14 0x0658; 0x0659; 0x065A; 0x065B; 0x065D; 0x065E; 0x06D6; 0x06D7; 0x06D8;
15 0x06D9; 0x06DA; 0x06DB; 0x06DC; 0x06DF; 0x06E0; 0x06E1; 0x06E2; 0x06E4;
16 0x06E7; 0x06E8; 0x06EB; 0x06EC; 0x0730; 0x0732; 0x0733; 0x0735; 0x0736;
17 0x073A; 0x073D; 0x073F; 0x0740; 0x0741; 0x0743; 0x0745; 0x0747; 0x0749;
18 0x074A; 0x07EB; 0x07EC; 0x07ED; 0x07EE; 0x07EF; 0x07F0; 0x07F1; 0x07F3;
19 0x0816; 0x0817; 0x0818; 0x0819; 0x081B; 0x081C; 0x081D; 0x081E; 0x081F;
20 0x0820; 0x0821; 0x0822; 0x0823; 0x0825; 0x0826; 0x0827; 0x0829; 0x082A;
21 0x082B; 0x082C; 0x082D; 0x0951; 0x0953; 0x0954; 0x0F82; 0x0F83; 0x0F86;
22 0x0F87; 0x135D; 0x135E; 0x135F; 0x17DD; 0x193A; 0x1A17; 0x1A75; 0x1A76;
23 0x1A77; 0x1A78; 0x1A79; 0x1A7A; 0x1A7B; 0x1A7C; 0x1B6B; 0x1B6D; 0x1B6E;
24 0x1B6F; 0x1B70; 0x1B71; 0x1B72; 0x1B73; 0x1CD0; 0x1CD1; 0x1CD2; 0x1CDA;
25 0x1CDB; 0x1CE0; 0x1DC0; 0x1DC1; 0x1DC3; 0x1DC4; 0x1DC5; 0x1DC6; 0x1DC7;
26 0x1DC8; 0x1DC9; 0x1DCB; 0x1DCC; 0x1DD1; 0x1DD2; 0x1DD3; 0x1DD4; 0x1DD5;
27 0x1DD6; 0x1DD7; 0x1DD8; 0x1DD9; 0x1DDA; 0x1DDB; 0x1DDC; 0x1DDD; 0x1DDE;
28 0x1DDF; 0x1DE0; 0x1DE1; 0x1DE2; 0x1DE3; 0x1DE4; 0x1DE5; 0x1DE6; 0x1DFE;
29 0x20D0; 0x20D1; 0x20D4; 0x20D5; 0x20D6; 0x20D7; 0x20DB; 0x20DC; 0x20E1;
30 0x20E7; 0x20E9; 0x20F0; 0xA66F; 0xA67C; 0xA67D; 0xA6F0; 0xA6F1; 0xA8E0;
31 0xA8E1; 0xA8E2; 0xA8E3; 0xA8E4; 0xA8E5; 0xA8E6; 0xA8E7; 0xA8E8; 0xA8E9;
32 0xA8EA; 0xA8EB; 0xA8EC; 0xA8ED; 0xA8EE; 0xA8EF; 0xA8F0; 0xA8F1; 0xAAB0;
33 0xAAB2; 0xAAB3; 0xAAB7; 0xAAB8; 0xAABE; 0xAABF; 0xAAC1; 0xFE20; 0xFE21;
34 0xFE22; 0xFE23; 0xFE24; 0xFE25; 0xFE26; 0x10A0F; 0x10A38; 0x1D185;
35 0x1D186; 0x1D187; 0x1D188; 0x1D189; 0x1D1AA; 0x1D1AB; 0x1D1AC; 0x1D1AD;
36 0x1D242; 0x1D243; 0x1D244;
37 |]
38
39let diacritic n = Uchar.of_int diacritics.(n mod Array.length diacritics)
40let row_diacritic = diacritic
41let column_diacritic = diacritic
42let id_high_byte_diacritic = diacritic
43
44let add_uchar buf u =
45 let code = Uchar.to_int u in
46 let put = Buffer.add_char buf in
47 if code < 0x80 then put (Char.chr code)
48 else if code < 0x800 then (
49 put (Char.chr (0xC0 lor (code lsr 6)));
50 put (Char.chr (0x80 lor (code land 0x3F))))
51 else if code < 0x10000 then (
52 put (Char.chr (0xE0 lor (code lsr 12)));
53 put (Char.chr (0x80 lor ((code lsr 6) land 0x3F)));
54 put (Char.chr (0x80 lor (code land 0x3F))))
55 else (
56 put (Char.chr (0xF0 lor (code lsr 18)));
57 put (Char.chr (0x80 lor ((code lsr 12) land 0x3F)));
58 put (Char.chr (0x80 lor ((code lsr 6) land 0x3F)));
59 put (Char.chr (0x80 lor (code land 0x3F))))
60
61let write buf ~image_id ?placement_id ~rows ~cols () =
62 (* Set foreground color *)
63 Printf.bprintf buf "\027[38;2;%d;%d;%dm"
64 ((image_id lsr 16) land 0xFF)
65 ((image_id lsr 8) land 0xFF)
66 (image_id land 0xFF);
67 (* Optional placement ID in underline color *)
68 placement_id
69 |> Option.iter (fun pid ->
70 Printf.bprintf buf "\027[58;2;%d;%d;%dm"
71 ((pid lsr 16) land 0xFF)
72 ((pid lsr 8) land 0xFF)
73 (pid land 0xFF));
74 (* High byte diacritic *)
75 let high_byte = (image_id lsr 24) land 0xFF in
76 let high_diac =
77 if high_byte > 0 then Some (id_high_byte_diacritic high_byte) else None
78 in
79 (* Write grid *)
80 for row = 0 to rows - 1 do
81 for col = 0 to cols - 1 do
82 add_uchar buf placeholder_char;
83 add_uchar buf (row_diacritic row);
84 add_uchar buf (column_diacritic col);
85 high_diac |> Option.iter (add_uchar buf)
86 done;
87 if row < rows - 1 then Buffer.add_string buf "\n\r"
88 done;
89 (* Reset colors *)
90 Buffer.add_string buf "\027[39m";
91 if Option.is_some placement_id then Buffer.add_string buf "\027[59m"