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term: "cache" pointer to current line

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This adds a pointer to the first cell on the current line. This
pointer must be updated every time the row changes.

The advantage is mainly that PRINT doesn't have to call
grid_get_range(), which is fairly expensive.
This commit is contained in:
Daniel Eklöf 2019-07-02 22:18:25 +02:00
parent ed68eafdf0
commit 9682e15deb
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3 changed files with 14 additions and 5 deletions
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6
vt.c
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@ -678,11 +678,7 @@ action(struct terminal *term, enum action action, uint8_t c)
term_cursor_to(term, term->cursor.row + 1, 0);
}
size_t cell_count = 1;
struct cell *cell = grid_get_range(
term->grid, term->cursor.linear, &cell_count);
assert(cell_count == 1);
struct cell *cell = &term->grid->cur_line[term->cursor.col];
term_damage_update(term, term->cursor.linear, 1);
if (term->vt.utf8.idx > 0) {