Re: [Qemu-devel] Gentlemen we have absolute movement! was:Absolute USB-HID device musings (was Re: VNC Terminal Server)

[Anthony Liguori <aliguori@us.ibm.com>]

That's absolutely awesome Brad!

Good job!  I'll see how it works with the new Xorg driver.

Regards,

Anthony Liguori

Brad Campbell wrote:
> Brad Campbell wrote:
>> Lonnie Mendez wrote:
>>
>>>   Please see the patch posted yesterday to this mailing list:
>>>
>>> http://gnome.dnsalias.net/patches/qemu-hidmousexp.patch
>>
>> Ta for that.. not sure how I missed it.
>> Now to try and get it to work..
>>
>
> Ok.. 1st cut.. it's not great, and it's not hooked up to anything at 
> the moment (the mouse just tootles around the screen on a timer) BUT! 
> we have absolute movement.
>
> The *stunning* news is it's resolution independent.. 640x480 - 800x600 
> - 1024x768
> 0,0 is top left and 7fff.7fff is bottom right.. no client scaling 
> required..
>
> Think I've figured out the Z axis thing also.. and we are good for 
> relative movement on that still
> (The Z axis below is way wrong, but I think I have figured it out)
>
> static const uint8_t qemu_mouse_hid_report_descriptor[] = {
>         0x05, 0x01, /* Usage Page Generic Desktop */
>         0x09, 0x01, /* Usage Mouse */
>         0xA1, 0x01, /* Collection Application */
>         0x09, 0x01, /* Usage Pointer */
>         0xA1, 0x00, /* Collection Physical */
>         0x05, 0x09, /* Usage Page Button */
>         0x19, 0x01, /* Usage Minimum Button 1 */
>         0x29, 0x03, /* Usage Maximum Button 3 */
>         0x15, 0x00, /* Logical Minimum 0 */
>         0x25, 0x01, /* Logical Maximum 1 */
>         0x95, 0x03, /* Report Count 3 */
>         0x75, 0x01, /* Report Size 1 */
>         0x81, 0x02, /* Input (Data, Var, Abs) */
>         0x95, 0x01, /* Report Count 1 */
>         0x75, 0x05, /* Report Size 5 */
>         0x81, 0x01, /* Input (Cnst, Var, Abs) */
>         0x05, 0x01, /* Usage Page Generic Desktop */
>         0x09, 0x30, /* Usage X */
>         0x09, 0x31, /* Usage Y */
>         0x15, 0x00, /* Logical Minimum 0 */
>         0x27, 0xFF, 0xFF, 0x00, 0x00, /* Logical Maximum 0xffff */
>         0x75, 0x10, /* Report Size 32 */
>         0x95, 0x02, /* Report Count 2 */
>         0x81, 0x02, /* Input (Data, Var, Abs) */
> //      0x09, 0x32, /* Usage Z */
> //      0x15, 0x81, /* Logical Minimum -127 */
> //      0x25, 0x7F, /* Logical Maximum 127 */
> //      0x75, 0x08, /* Report Size 8 */
> //      0x95, 0x01, /* Report Count 1 */
>         0xC0,       /* End Collection */
>         0xC0,       /* End Collection */
> };
> #endif
>
> static int usb_mouse_poll(USBMouseState *s, uint8_t *buf, int len)
> {
>     int dx, dy, dz, b, l, aa, bb, cc, dd;
>
>     dx = int_clamp(s->dx, -128, 127);
>     dy = int_clamp(s->dy, -128, 127);
>     dz = int_clamp(s->dz, -128, 127);
>
>     s->dx -= dx;
>     s->dy -= dy;
>     s->dz -= dz;
>     b = 0;
>     if (s->buttons_state & MOUSE_EVENT_LBUTTON)
>         b |= 0x01;
>     if (s->buttons_state & MOUSE_EVENT_RBUTTON)
>         b |= 0x02;
>     if (s->buttons_state & MOUSE_EVENT_MBUTTON)
>         b |= 0x04;
>
>     buf[0] = b;
>     buf[1] = s->X & 0xff;
>     buf[2] = s->X >> 8;
>     buf[3] = s->Y & 0xff;
>     buf[4] = s->Y >> 8;
>     aa=buf[1];
>     bb=buf[2];
>     cc=buf[3];
>     dd=buf[4];
>     l = 5;
>
>     return l;
> }
>