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If redrawing the region would mean redrawing > half the pane, just schedule to

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redraw the entire window. Also add a flag to skip updating the window any
further if it is scheduled to be redrawn. This has the effect of batching
multiple redraws together.
This commit is contained in:
Nicholas Marriott
2009-04-02 20:30:23 +00:00
parent b38f6608c7
commit 84cde92c8f
6 changed files with 51 additions and 39 deletions
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61
tty.c
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@ -1,4 +1,4 @@
/* $Id: tty.c,v 1.90 2009-04-01 18:21:42 nicm Exp $ */
/* $Id: tty.c,v 1.91 2009-04-02 20:30:23 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -379,17 +379,36 @@ tty_emulate_repeat(
}
}
/*
* Redraw scroll region using data from screen (already updated). Used when
* CSR not supported, or window is a pane that doesn't take up the full
* width of the terminal.
*/
void
tty_draw_region(struct tty *tty, struct screen *s, u_int ox, u_int oy)
tty_redraw_region(struct tty *tty, struct window_pane *wp)
{
u_int i;
struct screen *s = wp->screen;
u_int i;
/*
* If region is >= 50% of the screen, just schedule a window redraw. In
* most cases, this is likely to be followed by some more scrolling -
* without this, the entire pane ends up being redrawn many times which
* can be much more data.
*
* XXX Should just schedule to redraw this pane...
*/
if (s->old_rupper - s->old_rlower >= screen_size_y(s) / 2) {
server_redraw_window(wp->window);
return;
}
if (s->old_cy < s->old_rupper || s->old_cy > s->old_rlower) {
for (i = s->old_cy; i < screen_size_y(s); i++)
tty_draw_line(tty, s, i, ox, oy);
tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
} else {
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, s, i, ox, oy);
tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
}
}
@ -508,11 +527,7 @@ tty_cmd_insertline(struct tty *tty, struct window_pane *wp, va_list ap)
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. Redraw using data from screen
* (already updated).
*/
tty_draw_region(tty, s, wp->xoff, wp->yoff);
tty_redraw_region(tty, wp);
return;
}
@ -534,11 +549,7 @@ tty_cmd_deleteline(struct tty *tty, struct window_pane *wp, va_list ap)
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. Redraw using data from screen
* (already updated).
*/
tty_draw_region(tty, s, wp->xoff, wp->yoff);
tty_redraw_region(tty, wp);
return;
}
@ -612,18 +623,10 @@ void
tty_cmd_reverseindex(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. If would have scrolled, redraw
* scroll region from already updated window screen.
*/
if (s->old_cy != s->old_rupper)
return;
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, wp->screen, i, wp->xoff, wp->yoff);
tty_redraw_region(tty, wp);
return;
}
@ -641,18 +644,10 @@ void
tty_cmd_linefeed(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
/*
* Scroll region unsupported. If would have scrolled, redraw
* scroll region from already updated window screen.
*/
if (s->old_cy != s->old_rlower)
return;
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, wp->screen, i, wp->xoff, wp->yoff);
tty_redraw_region(tty, wp);
return;
}