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Avoid overshooting Sixel height in sixel_parse_write, GitHub issue 5071 from

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nincsnevem662 at gmail dot com.
This commit is contained in:
Nicholas Marriott
2026-05-11 12:00:06 +01:00
parent 8fb1b1d412
commit bfbfb6dbf3
1 changed files with 4 additions and 10 deletions
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14
image-sixel.c
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@@ -122,19 +122,13 @@ sixel_set_pixel(struct sixel_image *si, u_int x, u_int y, u_int c)
static int
sixel_parse_write(struct sixel_image *si, u_int ch)
{
struct sixel_line *sl;
u_int i;
if (sixel_parse_expand_lines(si, si->dy + 6) != 0)
return (1);
sl = &si->lines[si->dy];
for (i = 0; i < 6; i++) {
if (sixel_parse_expand_line(si, sl, si->dx + 1) != 0)
return (1);
if (ch & (1 << i))
sl->data[si->dx] = si->dc;
sl++;
if (ch & (1 << i)) {
if (sixel_set_pixel(si, si->dx, si->dy + i, si->dc))
return (1);
}
}
return (0);
}