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sixel: verify scrollback consistency: new verify function

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Verifies sixels have been scrolled out correctly
This commit is contained in:
Daniel Eklöf 2020-10-05 18:29:24 +02:00
parent 11760e9071
commit 5ebab9dea9
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GPG key ID: 5BBD4992C116573F
1 changed files with 26 additions and 0 deletions
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26
sixel.c
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@ -179,6 +179,31 @@ verify_no_wraparound_crossover(const struct terminal *term)
#endif #endif
} }
/*
* Verify there aren't any sixels that cross the scrollback end. This
* invariant means a sixel's rebased row numbers are strictly
* increasing.
*/
static void
verify_scrollback_consistency(const struct terminal *term)
{
#if defined(_DEBUG)
tll_foreach(term->grid->sixel_images, it) {
const struct sixel *six = &it->item;
int last_row = -1;
for (int i = 0; i < six->rows; i++) {
int row_no = rebase_row(term, six->pos.row + i);
if (last_row != -1)
assert(last_row < row_no);
last_row = row_no;
}
}
#endif
}
/* /*
* Verifies no sixel overlap with any other sixels. * Verifies no sixel overlap with any other sixels.
*/ */
@ -223,6 +248,7 @@ static void
verify_sixels(const struct terminal *term) verify_sixels(const struct terminal *term)
{ {
verify_no_wraparound_crossover(term); verify_no_wraparound_crossover(term);
verify_scrollback_consistency(term);
verify_no_overlap(term); verify_no_overlap(term);
verify_list_order(term); verify_list_order(term);
} }