ref: 16da8c05296632e7f086feed38328b6f1737f4a2
parent: 78cf847bfbb3aa5f78713fb47200070c5605d5ef
author: Sigrid Solveig Haflínudóttir <ftrvxmtrx@gmail.com>
date: Tue Jul 6 11:44:16 EDT 2021
vmx: emulate ps/2 intellimouse scrolling
--- a/sys/src/cmd/vmx/fns.h
+++ b/sys/src/cmd/vmx/fns.h
@@ -1,4 +1,5 @@
#define MIN(a,b) ((a)<(b)?(a):(b))
+#define MAX(a,b) ((a)>(b)?(a):(b))
void *emalloc(ulong);
void loadkernel(char *);
uvlong rget(char *);
--- a/sys/src/cmd/vmx/io.c
+++ b/sys/src/cmd/vmx/io.c
@@ -671,8 +671,10 @@
} state;
u8int buf[64];
u8int bufr, bufw;
- u8int actcmd;
- u8int scaling21, res, rate;
+ u8int actcmd, id;
+ u8int scaling21, res;
+ u8int ratepp, ratep, rate;
+ int scroll;
} mouse = {.res = 2,
.rate = 100
@@ -741,6 +743,8 @@
while(nbrecv(mousech, &m) > 0){mouse.xy = addpt(mouse.xy, m.xy);
mouse.buttons = m.buttons;
+ if(m.buttons & 24)
+ mouse.scroll += (m.buttons>>2 & 6) - 3;
mouse.gotmouse = 1;
}
}
@@ -750,6 +754,7 @@
{updatemouse();
mouse.xy = Pt(0, 0);
+ mouse.scroll = 0;
mouse.gotmouse = 0;
}
@@ -756,7 +761,7 @@
static void
mousepacket(int force)
{- int dx, dy;
+ int dx, dy, dz;
u8int b0;
updatemouse();
@@ -764,6 +769,7 @@
return;
dx = mouse.xy.x;
dy = -mouse.xy.y;
+ dz = MIN(7, MAX(-8, mouse.scroll));
b0 = 8;
if((ulong)(dx + 256) > 511) dx = dx >> 31 ^ 0xff;
if((ulong)(dy + 256) > 511) dy = dy >> 31 ^ 0xff;
@@ -772,9 +778,12 @@
mouseputc(b0);
mouseputc((u8int)dx);
mouseputc((u8int)dy);
+ if(mouse.id == 3)
+ mouseputc((u8int)dz);
mouse.xy.x -= dx;
mouse.xy.y += dy;
- mouse.gotmouse = mouse.xy.x != 0 || mouse.xy.y != 0;
+ mouse.scroll -= dz;
+ mouse.gotmouse = mouse.xy.x != 0 || mouse.xy.y != 0 || mouse.scroll != 0;
}
static void
@@ -800,7 +809,11 @@
mouse.actcmd = 0;
break;
case 0xf3: /* set sampling rate */
+ mouse.ratepp = mouse.ratep;
+ mouse.ratep = mouse.rate;
mouse.rate = val;
+ if(mouse.ratepp == 200 && mouse.ratep == 100 && mouse.rate == 80)
+ mouse.id = 3; /* magic sequence for IntelliMouse */
mouseputc(0xfa);
mouse.actcmd = 0;
break;
@@ -807,12 +820,11 @@
default:
switch(val){case 0xf3: case 0xe8: mouseputc(0xfa); mouse.actcmd = val; break;
-
case 0xff: mouseputc(0xfa); mousedefaults(); mouse.state = MOUSERESET; break; /* reset */
case 0xf6: mouseputc(0xfa); mousedefaults(); mouse.state = mouse.state & ~0xf | MOUSESTREAM; break; /* set defaults */
case 0xf5: mouseputc(0xfa); clearmouse(); if((mouse.state&0xf) == MOUSESTREAM) mouse.state &= ~MOUSEREP; break; /* disable reporting */
case 0xf4: mouseputc(0xfa); clearmouse(); if((mouse.state&0xf) == MOUSESTREAM) mouse.state |= MOUSEREP; break; /* enable reporting */
- case 0xf2: mouseputc(0xfa); mouseputc(0x00); clearmouse(); break; /* report device id */
+ case 0xf2: mouseputc(0xfa); mouseputc(mouse.id); clearmouse(); break; /* report device id */
case 0xf0: mouseputc(0xfa); clearmouse(); mouse.state = mouse.state & ~0xf | MOUSEREMOTE; break; /* set remote mode */
case 0xee: mouseputc(0xfa); clearmouse(); mouse.state |= MOUSEWRAP; break; /* set wrap mode */
case 0xec: mouseputc(0xfa); clearmouse(); mouse.state &= ~MOUSEWRAP; break; /* reset wrap mode */