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Refactor kitty images to use unified image cache API

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The original kitty implementation used a passthrough approach where images
were forwarded directly to the outer terminal without being stored in tmux's
image cache.

This refactors kitty images to work like sixel images.
This commit is contained in:
Thomas Adam
2026-03-03 18:53:58 +00:00
parent aefdb34846
commit 9c3ec2b8eb
8 changed files with 359 additions and 53 deletions
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43
image-kitty.c
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@@ -190,6 +190,49 @@ kitty_free(struct kitty_image *ki)
free(ki);
}
/*
* Serialize a kitty_image back into an APC escape sequence for transmission
* to the terminal. This recreates the original command that was parsed.
*/
char *
kitty_print(struct kitty_image *ki, size_t *outlen)
{
char *out;
size_t total, pos;
if (ki == NULL || ki->ctrl == NULL)
return (NULL);
/* Calculate total length: ESC _ G + ctrl + ; + encoded + ESC \ */
total = 3 + ki->ctrllen; /* \033_G + ctrl */
if (ki->encoded != NULL && ki->encodedlen > 0) {
total += 1 + ki->encodedlen; /* ; + encoded */
}
total += 2; /* \033\\ */
out = xmalloc(total + 1);
*outlen = total;
/* Build the sequence */
pos = 0;
memcpy(out + pos, "\033_G", 3);
pos += 3;
memcpy(out + pos, ki->ctrl, ki->ctrllen);
pos += ki->ctrllen;
if (ki->encoded != NULL && ki->encodedlen > 0) {
out[pos++] = ';';
memcpy(out + pos, ki->encoded, ki->encodedlen);
pos += ki->encodedlen;
}
memcpy(out + pos, "\033\\", 2);
pos += 2;
out[pos] = '\0';
return (out);
}
char *
kitty_delete_all(size_t *outlen)
{