[Spice-devel] [Qemu-devel] paravirtual mouse/tablet

[Alexander Graf]

On 13.01.2011, at 17:39, Anthony Liguori wrote:

> On 01/13/2011 10:14 AM, Avi Kivity wrote:
>> On 01/13/2011 05:52 PM, Anthony Liguori wrote:
>>> 
>>> /* host->guest, sent before any other events */
>>> typedef struct qemu_pvtablet_init {
>>>    uint32_t res_x;   /* x axis resolution */
>>>    uint32_t res_y;   /* y axis resolution */
>>>    uint32_t features;  /* qemu_pvtablet_features */
>> 
>> uint32_t available_buttons; /* bitmask */
> 
> Yes, I had intended to do that but left it out.
> 
> Should it be a bitmask or just a button count?  Buttons really have no standard meaning so usually a button count is sufficient.

Some random thoughts:

  * multitouch capabilities would be good to design in a mouse protocol for 2011, so having say 16 x/y pairs would be better
  * on mac os at least scrolling is not done by pressing virtual buttons, but by having a separate scroll interface that knows about velocity and such - maybe worth adding that to the protocol from the beginning too.


Alex