diff options
| author | philip <philip@FreeBSD.org> | 2007-02-21 12:27:12 +0000 |
|---|---|---|
| committer | philip <philip@FreeBSD.org> | 2007-02-21 12:27:12 +0000 |
| commit | e0f499d1d4431d2e6df14594352d3b4828252d6f (patch) | |
| tree | 8f2df30a1e9c79b8e09d7dc29d55cee093923b96 /sys/dev/syscons/fire | |
| parent | 74bf41b149bacbb9c41cd49e28a27658d11313c2 (diff) | |
| download | FreeBSD-src-e0f499d1d4431d2e6df14594352d3b4828252d6f.zip FreeBSD-src-e0f499d1d4431d2e6df14594352d3b4828252d6f.tar.gz | |
Optimize set_origin() use in some screensavers to stop them eating
cpu power when the origin hasn't changed.
PR: kern/100683
Submitted by: Gareth McCaughan <gareth -dot- mccaughan -at- pobox.com>
MFC after: 3 days
Diffstat (limited to 'sys/dev/syscons/fire')
| -rw-r--r-- | sys/dev/syscons/fire/fire_saver.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sys/dev/syscons/fire/fire_saver.c b/sys/dev/syscons/fire/fire_saver.c index 0bc031c..de60a20 100644 --- a/sys/dev/syscons/fire/fire_saver.c +++ b/sys/dev/syscons/fire/fire_saver.c @@ -52,6 +52,12 @@ #define GREEN(n) ((n) * 3 + 1) #define BLUE(n) ((n) * 3 + 2) +#define SET_ORIGIN(adp, o) do { \ + int oo = o; \ + if (oo != last_origin) \ + set_origin(adp, last_origin = oo); \ + } while (0) + static u_char *buf; static u_char *vid; static int banksize, scrmode, bpsl, scrw, scrh; @@ -63,6 +69,7 @@ fire_update(video_adapter_t *adp) { int x, y; int o, p; + int last_origin = -1; /* make a new bottom line */ for (x = 0, y = scrh; x < scrw; x++) @@ -87,12 +94,12 @@ fire_update(video_adapter_t *adp) p -= banksize; o += banksize; } - set_origin(adp, o); + SET_ORIGIN(adp, o); if (p + scrw < banksize) { bcopy(buf + y * scrw, vid + p, scrw); } else { bcopy(buf + y * scrw, vid + p, banksize - p); - set_origin(adp, o + banksize); + SET_ORIGIN(adp, o + banksize); bcopy(buf + y * scrw + (banksize - p), vid, scrw - (banksize - p)); p -= banksize; |
