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test: adjust the relative pointer motion test for low-dpi devices

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This escaped us before because the MOUSE_DPI setting on the low-dpi device was
ignored thanks to a broken udev rule (see a future commit for that).

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2019-06-12 14:24:57 +10:00
parent f70b80569a
commit 3b7b9ef682
1 changed files with 20 additions and 1 deletions
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21
test/test-pointer.c
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@ -35,16 +35,19 @@
#include "litest.h"
static void
test_relative_event(struct litest_device *dev, int dx, int dy)
test_relative_event(struct litest_device *dev, double dx, double dy)
{
struct libinput *li = dev->libinput;
struct libinput_event_pointer *ptrev;
struct libinput_event *event;
struct udev_device *ud;
double ev_dx, ev_dy;
double expected_dir;
double expected_length;
double actual_dir;
double actual_length;
const char *prop;
int dpi = 1000;
litest_event(dev, EV_REL, REL_X, dx);
litest_event(dev, EV_REL, REL_Y, dy);
@ -55,6 +58,22 @@ test_relative_event(struct litest_device *dev, int dx, int dy)
event = libinput_get_event(li);
ptrev = litest_is_motion_event(event);
/* low-dpi devices scale up, not down, especially for slow motion.
* so a 1 unit movement in a 200dpi mouse still sends a 1 pixel
* movement. Work aorund this here by checking for the MOUSE_DPI
* property.
*/
ud = libinput_device_get_udev_device(dev->libinput_device);
litest_assert_ptr_notnull(ud);
prop = udev_device_get_property_value(ud, "MOUSE_DPI");
if (prop) {
dpi = parse_mouse_dpi_property(prop);
dx *= 1000.0/dpi;
dy *= 1000.0/dpi;
}
udev_device_unref(ud);
expected_length = sqrt(4 * dx*dx + 4 * dy*dy);
expected_dir = atan2(dx, dy);