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filter: add a "filter_constant" hook to the filter interface

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For when we need to apply some transformation to the data but it shouldn't be
acceleration. Example use are touchpad coordinates, even when not
accelerating, we still want to apply the magic slowdown.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2015-08-17 16:32:20 +10:00
parent e4fd60ce5e
commit d8c37a94c0
3 changed files with 46 additions and 0 deletions
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4
src/filter-private.h
View file

@ -33,6 +33,10 @@ struct motion_filter_interface {
struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
void *data, uint64_t time);
struct normalized_coords (*filter_constant)(
struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
void *data, uint64_t time);
void (*restart)(struct motion_filter *filter,
void *data,
uint64_t time);

20
src/filter.c
View file

@ -64,6 +64,14 @@ filter_dispatch(struct motion_filter *filter,
return filter->interface->filter(filter, unaccelerated, data, time);
}
struct normalized_coords
filter_dispatch_constant(struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
void *data, uint64_t time)
{
return filter->interface->filter_constant(filter, unaccelerated, data, time);
}
void
filter_restart(struct motion_filter *filter,
void *data, uint64_t time)
@ -319,6 +327,14 @@ accelerator_filter(struct motion_filter *filter,
return accelerated;
}
static struct normalized_coords
accelerator_filter_noop(struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
void *data, uint64_t time)
{
return *unaccelerated;
}
static struct normalized_coords
accelerator_filter_low_dpi(struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
@ -673,6 +689,7 @@ trackpoint_accel_profile(struct motion_filter *filter,
struct motion_filter_interface accelerator_interface = {
.filter = accelerator_filter,
.filter_constant = accelerator_filter_noop,
.restart = accelerator_restart,
.destroy = accelerator_destroy,
.set_speed = accelerator_set_speed,
@ -719,6 +736,7 @@ create_pointer_accelerator_filter_linear(int dpi)
struct motion_filter_interface accelerator_interface_low_dpi = {
.filter = accelerator_filter_low_dpi,
.filter_constant = accelerator_filter_noop,
.restart = accelerator_restart,
.destroy = accelerator_destroy,
.set_speed = accelerator_set_speed,
@ -756,6 +774,7 @@ create_pointer_accelerator_filter_touchpad(int dpi)
struct motion_filter_interface accelerator_interface_x230 = {
.filter = accelerator_filter_x230,
.filter_constant = accelerator_filter_noop,
.restart = accelerator_restart,
.destroy = accelerator_destroy,
.set_speed = accelerator_set_speed,
@ -793,6 +812,7 @@ create_pointer_accelerator_filter_lenovo_x230(int dpi)
struct motion_filter_interface accelerator_interface_trackpoint = {
.filter = accelerator_filter_trackpoint,
.filter_constant = accelerator_filter_noop,
.restart = accelerator_restart,
.destroy = accelerator_destroy,
.set_speed = accelerator_set_speed,

22
src/filter.h
View file

@ -34,11 +34,33 @@
struct motion_filter;
/**
* Accelerate the given coordinates.
* Takes a set of unaccelerated deltas and accelerates them based on the
* current and previous motion.
*
* This is a superset of filter_dispatch_constant()
*
* @see filter_dispatch_constant
*/
struct normalized_coords
filter_dispatch(struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
void *data, uint64_t time);
/**
* Apply constant motion filters, but no acceleration.
*
* Takes a set of unaccelerated deltas and applies any constant filters to
* it but does not accelerate the delta in the conventional sense.
*
* @see filter_dispatch
*/
struct normalized_coords
filter_dispatch_constant(struct motion_filter *filter,
const struct normalized_coords *unaccelerated,
void *data, uint64_t time);
void
filter_restart(struct motion_filter *filter,
void *data, uint64_t time);