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Add a minor optimisatin: if the character being printed is space, don't worry

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about setting the background colour or attributes (except reverse).
This commit is contained in:
Nicholas Marriott
2009-10-28 08:52:36 +00:00
parent 5730cbf3e3
commit 1eaefbf169
2 changed files with 18 additions and 2 deletions
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18
tty.c
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@@ -1119,10 +1119,24 @@ out:
void
tty_attributes(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
struct grid_cell *tc = &tty->cell, gc2;
u_char changed;
u_int fg = gc->fg, bg = gc->bg, attr = gc->attr;
/* If the character is space, don't care about foreground. */
if (gc->data == ' ' && !(gc->flags & GRID_FLAG_UTF8)) {
memcpy(&gc2, gc, sizeof gc2);
if (gc->attr & GRID_ATTR_REVERSE)
gc2.bg = tc->bg;
else
gc2.fg = tc->fg;
gc2.attr = tc->attr & ~GRID_ATTR_REVERSE;
gc2.attr |= gc->attr & GRID_ATTR_REVERSE;
gc = &gc2;
}
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~attr)
tty_reset(tty);
@@ -1185,7 +1199,7 @@ tty_colours(struct tty *tty, const struct grid_cell *gc, int *attr)
/* No changes? Nothing is necessary. */
if (fg == tc->fg && bg == tc->bg &&
((flags ^ tc->flags) & (GRID_FLAG_FG256|GRID_FLAG_BG256)) == 0)
return;
return;
/*
* Is either the default colour? This is handled specially because the