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Add support for the kitty graphics protocol

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Kitty-capable terminals (kitty, ghostty, and others) can display
inline images via APC escape sequences.

Kitty's image support uses a passthrough model: APC sequences from
programs running inside panes are relayed verbatim to the outer
terminal with cursor positioning adjusted for the pane offset.

The outer terminal handles all image rendering and therefore itself must
be kitty-aware.
This commit is contained in:
Thomas Adam
2026-02-28 21:14:32 +00:00
parent d9d2b2f1ee
commit cf6cbe430c
11 changed files with 608 additions and 2 deletions
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4
tty-term.c
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@@ -270,6 +270,7 @@ static const struct tty_term_code_entry tty_term_codes[] = {
[TTYC_SETULC1] = { TTYCODE_STRING, "Setulc1" },
[TTYC_SE] = { TTYCODE_STRING, "Se" },
[TTYC_SXL] = { TTYCODE_FLAG, "Sxl" },
[TTYC_KTY] = { TTYCODE_FLAG, "Kty" },
[TTYC_SGR0] = { TTYCODE_STRING, "sgr0" },
[TTYC_SITM] = { TTYCODE_STRING, "sitm" },
[TTYC_SMACS] = { TTYCODE_STRING, "smacs" },
@@ -461,6 +462,9 @@ tty_term_apply_overrides(struct tty_term *term)
/* Log the SIXEL flag. */
log_debug("SIXEL flag is %d", !!(term->flags & TERM_SIXEL));
/* Log the KITTY flag. */
log_debug("KITTY flag is %d", !!(term->flags & TERM_KITTY));
/* Update the RGB flag if the terminal has RGB colours. */
if (tty_term_has(term, TTYC_SETRGBF) &&
tty_term_has(term, TTYC_SETRGBB))