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sixel: initial support

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This implements basic parsing of sixel data. Lots of limitations and
temporary solutions as this is still work-in-progress:

* Maximum image size hardcoded to 800x800
* No HLS color format support
* Image is always rendered at 0x0 in the terminal
This commit is contained in:
Daniel Eklöf 2020-02-21 21:53:23 +01:00
parent e8197d22f7
commit 9e3bfb1eab
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GPG key ID: 5BBD4992C116573F
6 changed files with 350 additions and 3 deletions
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23
dcs.c
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@ -3,6 +3,7 @@
#define LOG_MODULE "dcs"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "sixel.h"
#include "vt.h"
static void
@ -35,9 +36,20 @@ dcs_hook(struct terminal *term, uint8_t final)
assert(term->vt.dcs.data == NULL);
assert(term->vt.dcs.size == 0);
assert(term->vt.dcs.put_handler == NULL);
assert(term->vt.dcs.unhook_handler == NULL);
switch (term->vt.private[0]) {
case 0:
switch (final) {
case 'q':
sixel_init(term);
term->vt.dcs.put_handler = &sixel_put;
term->vt.dcs.unhook_handler = &sixel_unhook;
break;
}
break;
case '=':
switch (final) {
case 's':
@ -75,9 +87,13 @@ void
dcs_put(struct terminal *term, uint8_t c)
{
LOG_DBG("PUT: %c", c);
if (!ensure_size(term, term->vt.dcs.idx + 1))
return;
term->vt.dcs.data[term->vt.dcs.idx++] = c;
if (term->vt.dcs.put_handler != NULL)
term->vt.dcs.put_handler(term, c);
else {
if (!ensure_size(term, term->vt.dcs.idx + 1))
return;
term->vt.dcs.data[term->vt.dcs.idx++] = c;
}
}
void
@ -87,6 +103,7 @@ dcs_unhook(struct terminal *term)
term->vt.dcs.unhook_handler(term);
term->vt.dcs.unhook_handler = NULL;
term->vt.dcs.put_handler = NULL;
free(term->vt.dcs.data);
term->vt.dcs.data = NULL;