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sixel: initialize the color table to colors used by the VT340

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Daniel Eklöf 2024-03-15 15:19:43 +01:00
parent dd3bb13d97
commit 60fd4a262c
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GPG key ID: 5BBD4992C116573F
2 changed files with 40 additions and 3 deletions
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4
CHANGELOG.md
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@ -143,6 +143,10 @@
* Crash when failing to load an xcursor image ([#1624][1624]).
* Crash when resizing a dynamically sized sixel (no raster
attributes), with a non-1:1 aspect ratio.
* The default sixel color table is now initialized to the colors used
by the VT340, instead of not being initialized at all (thus
requiring the sixel escape sequence to explicitly set all colors it
used).
[1531]: https://codeberg.org/dnkl/foot/issues/1531
[1573]: https://codeberg.org/dnkl/foot/issues/1573

39
sixel.c
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@ -4,7 +4,7 @@
#include <limits.h>
#define LOG_MODULE "sixel"
#define LOG_ENABLE_DBG 0
#define LOG_ENABLE_DBG 1
#include "log.h"
#include "debug.h"
#include "grid.h"
@ -19,6 +19,29 @@ static size_t count;
static void sixel_put_generic(struct terminal *term, uint8_t c);
static void sixel_put_ar_11(struct terminal *term, uint8_t c);
/* VT330/VT340 Programmer Reference Manual - Table 2-3 VT340 Default Color Map */
static const uint32_t vt340_default_colors[16] = {
0xff000000,
0xff3333cc,
0xffcc2121,
0xff33cc33,
0xffcc33cc,
0xff33cccc,
0xffcccc33,
0xff878787,
0xff424242,
0xff545499,
0xff994242,
0xff549954,
0xff995499,
0xff549999,
0xff999954,
0xffcccccc,
};
_Static_assert(sizeof(vt340_default_colors) / sizeof(vt340_default_colors[0]) == 16,
"wrong number of elements");
void
sixel_fini(struct terminal *term)
{
@ -68,17 +91,27 @@ sixel_init(struct terminal *term, int p1, int p2, int p3)
term->sixel.image.width = 0;
term->sixel.image.height = 0;
/* TODO: default palette */
if (term->sixel.use_private_palette) {
xassert(term->sixel.private_palette == NULL);
term->sixel.private_palette = xcalloc(
term->sixel.palette_size, sizeof(term->sixel.private_palette[0]));
memcpy(
term->sixel.private_palette, vt340_default_colors,
min(sizeof(vt340_default_colors),
term->sixel.palette_size * sizeof(term->sixel.private_palette[0])));
term->sixel.palette = term->sixel.private_palette;
} else {
if (term->sixel.shared_palette == NULL) {
term->sixel.shared_palette = xcalloc(
term->sixel.palette_size, sizeof(term->sixel.shared_palette[0]));
memcpy(
term->sixel.shared_palette, vt340_default_colors,
min(sizeof(vt340_default_colors),
term->sixel.palette_size * sizeof(term->sixel.shared_palette[0])));
} else {
/* Shared palette - do *not* reset palette for new sixels */
}