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nusb/kb: only send to mousein when mouse state actually changes

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This commit is contained in:
cinap_lenrek 2013-08-10 07:59:54 +02:00
parent dfe6118e30
commit f887f71320
1 changed files with 10 additions and 1 deletions
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11
sys/src/cmd/nusb/kb/kb.c
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@ -460,6 +460,7 @@ ptrwork(void* a)
char err[ERRMAX];
char mbuf[80];
int c, b, nerrs;
int lastx, lasty, lastb;
KDev* f = a;
Ptr p;
@ -467,6 +468,7 @@ ptrwork(void* a)
sethipri();
memset(&p, 0, sizeof(p));
lastx = lasty = lastb = 0;
nerrs = 0;
for(;;){
@ -508,7 +510,14 @@ ptrwork(void* a)
if(p.z != 0)
b |= (p.z > 0) ? 8 : 16;
seprint(mbuf, mbuf+sizeof(mbuf), "m%11d %11d %11d", p.x, p.y, b);
if(lastx == p.x && lasty == p.y && lastb == b)
continue;
lastx = p.x;
lasty = p.y;
lastb = b;
seprint(mbuf, mbuf+sizeof(mbuf), "m%11d %11d %11d", lastx, lasty, lastb);
if(write(f->infd, mbuf, strlen(mbuf)) < 0)
kbfatal(f, "mousein i/o");
}