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backends/x11: Implement get_dimensions() in X11 input devices

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We can get the information from X11 itself, so do the calculations to return
the device physical size.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2617>
This commit is contained in:
Carlos Garnacho 2022-09-06 13:00:04 +02:00 committed by Marge Bot
parent 21fb6cc412
commit b040964025
1 changed files with 76 additions and 0 deletions
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76
src/backends/x11/meta-input-device-x11.c
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@ -273,6 +273,81 @@ meta_input_device_x11_is_mode_switch_button (ClutterInputDevice *device,
return button_group == (int) group; return button_group == (int) group;
} }
static gboolean
meta_input_device_x11_get_dimensions (ClutterInputDevice *device,
unsigned int *width,
unsigned int *height)
{
MetaInputDeviceX11 *device_x11 = META_INPUT_DEVICE_X11 (device);
ClutterSeat *seat = clutter_input_device_get_seat (device);
MetaSeatX11 *seat_x11 = META_SEAT_X11 (seat);
MetaBackendX11 *backend_x11 =
META_BACKEND_X11 (meta_seat_x11_get_backend (seat_x11));
Display *xdisplay =
meta_backend_x11_get_xdisplay (backend_x11);
XIDeviceInfo *info;
uint *value, w, h;
int i, n_info;
static gboolean atoms_initialized = FALSE;
static Atom abs_axis_atoms[4] = { 0, };
meta_clutter_x11_trap_x_errors ();
info = XIQueryDevice (xdisplay, device_x11->device_id, &n_info);
*width = *height = w = h = 0;
if (meta_clutter_x11_untrap_x_errors ())
return FALSE;
if (!info)
return FALSE;
if (G_UNLIKELY (!atoms_initialized))
{
const char *abs_axis_atom_names[4] = {
"Abs X",
"Abs MT Position X",
"Abs Y",
"Abs MT Position Y",
};
XInternAtoms (xdisplay,
(char **) abs_axis_atom_names,
G_N_ELEMENTS (abs_axis_atom_names),
False,
abs_axis_atoms);
atoms_initialized = TRUE;
}
for (i = 0; i < info->num_classes; i++)
{
XIValuatorClassInfo *valuator_info;
if (info->classes[i]->type != XIValuatorClass)
continue;
valuator_info = (XIValuatorClassInfo *) info->classes[i];
if (valuator_info->label == abs_axis_atoms[0] || /* Abs X */
valuator_info->label == abs_axis_atoms[1]) /* Abs MT X */
value = &w;
else if (valuator_info->label == abs_axis_atoms[2] || /* Abs Y */
valuator_info->label == abs_axis_atoms[3]) /* Abs MT Y */
value = &h;
else
continue;
*value = (valuator_info->max - valuator_info->min) * 1000 / valuator_info->resolution;
}
*width = w;
*height = h;
XIFreeDeviceInfo (info);
return (w != 0 && h != 0);
}
static void static void
meta_input_device_x11_class_init (MetaInputDeviceX11Class *klass) meta_input_device_x11_class_init (MetaInputDeviceX11Class *klass)
{ {
@ -287,6 +362,7 @@ meta_input_device_x11_class_init (MetaInputDeviceX11Class *klass)
device_class->is_grouped = meta_input_device_x11_is_grouped; device_class->is_grouped = meta_input_device_x11_is_grouped;
device_class->get_group_n_modes = meta_input_device_x11_get_group_n_modes; device_class->get_group_n_modes = meta_input_device_x11_get_group_n_modes;
device_class->is_mode_switch_button = meta_input_device_x11_is_mode_switch_button; device_class->is_mode_switch_button = meta_input_device_x11_is_mode_switch_button;
device_class->get_dimensions = meta_input_device_x11_get_dimensions;
props[PROP_ID] = props[PROP_ID] =
g_param_spec_int ("id", g_param_spec_int ("id",