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xenfb: Add [feature|request]-raw-pointer 

Writes "feature-raw-pointer" during init to indicate the backend
can pass raw unscaled values for absolute axes to the frontend.
Frontends set "request-raw-pointer" to indicate the backend should
not attempt to scale absolute values to console size.
"request-raw-pointer" is only valid if "request-abs-pointer" is
also set. Raw unscaled pointer values are in the range [0, 0x7fff]

"feature-raw-pointer" and "request-raw-pointer" added to Xen
header in commit 7868654ff7fe5e4a2eeae2b277644fa884a5031e

Signed-off-by: Owen Smith <owen.smith@citrix.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Owen Smith 2017-11-03 11:56:30 +00:00 committed by Stefano Stabellini
parent a1ccbafded
commit 34975e536f
1 changed files with 30 additions and 17 deletions
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47
hw/display/xenfb.c
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@ -52,6 +52,7 @@ struct common {
struct XenInput {
struct common c;
int abs_pointer_wanted; /* Whether guest supports absolute pointer */
int raw_pointer_wanted; /* Whether guest supports raw (unscaled) pointer */
QemuInputHandlerState *qkbd;
QemuInputHandlerState *qmou;
int axis[INPUT_AXIS__MAX];
@ -264,24 +265,28 @@ static void xenfb_mouse_event(DeviceState *dev, QemuConsole *src,
case INPUT_EVENT_KIND_ABS:
move = evt->u.abs.data;
con = qemu_console_lookup_by_index(0);
if (!con) {
xen_pv_printf(&xenfb->c.xendev, 0, "No QEMU console available");
return;
if (xenfb->raw_pointer_wanted) {
xenfb->axis[move->axis] = move->value;
} else {
con = qemu_console_lookup_by_index(0);
if (!con) {
xen_pv_printf(&xenfb->c.xendev, 0, "No QEMU console available");
return;
}
surface = qemu_console_surface(con);
switch (move->axis) {
case INPUT_AXIS_X:
scale = surface_width(surface) - 1;
break;
case INPUT_AXIS_Y:
scale = surface_height(surface) - 1;
break;
default:
scale = 0x8000;
break;
}
xenfb->axis[move->axis] = move->value * scale / 0x7fff;
}
surface = qemu_console_surface(con);
switch (move->axis) {
case INPUT_AXIS_X:
scale = surface_width(surface) - 1;
break;
case INPUT_AXIS_Y:
scale = surface_height(surface) - 1;
break;
default:
scale = 0x8000;
break;
}
xenfb->axis[move->axis] = move->value * scale / 0x7fff;
break;
case INPUT_EVENT_KIND_REL:
@ -339,6 +344,7 @@ static QemuInputHandler xenfb_rel_mouse = {
static int input_init(struct XenDevice *xendev)
{
xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
xenstore_write_be_int(xendev, "feature-raw-pointer", 1);
return 0;
}
@ -362,6 +368,13 @@ static void input_connected(struct XenDevice *xendev)
&in->abs_pointer_wanted) == -1) {
in->abs_pointer_wanted = 0;
}
if (xenstore_read_fe_int(xendev, "request-raw-pointer",
&in->raw_pointer_wanted) == -1) {
in->raw_pointer_wanted = 0;
}
if (in->raw_pointer_wanted && in->abs_pointer_wanted == 0) {
xen_pv_printf(xendev, 0, "raw pointer set without abs pointer");
}
if (in->qkbd) {
qemu_input_handler_unregister(in->qkbd);