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tools: change touchpad-edge-detector to require physical size

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Almost no-one does the calculations for me to update the udev rules (and some
rules were submitted with the <x resolution> placeholders left in).
Require the user to specify the physical size so we just copy/paste the actual
udev rule.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
This commit is contained in:
Peter Hutterer 2016-07-13 11:33:43 +10:00
parent 4dd93f0108
commit 911106230a
2 changed files with 34 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
configure.ac
View file

@ -66,6 +66,8 @@ if test "x$lt_cv_prog_gnu_ld" = "xyes"; then
fi
AC_SUBST([GNU_LD_FLAGS], $with_ldflags)
AC_CHECK_LIB([m], [round])
PKG_PROG_PKG_CONFIG()
PKG_CHECK_MODULES(CHECK, [check >= 0.9.9], [HAVE_CHECK="yes"], [HAVE_CHECK="no"])
if test "x$HAVE_CHECK" = "xyes"; then

49
tools/touchpad-edge-detector.c
View file

@ -30,6 +30,7 @@
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <math.h>
#include <poll.h>
#include <signal.h>
#include <stdint.h>
@ -43,10 +44,11 @@
static int
usage(void) {
printf("Usage: %s /dev/input/event0\n", program_invocation_short_name);
printf("Usage: %s 12x34 /dev/input/event0\n", program_invocation_short_name);
printf("\n");
printf("This tool reads the touchpad events from the kernel and calculates\n "
"the minimum and maximum for the x and y coordinates, respectively.\n");
"the minimum and maximum for the x and y coordinates, respectively.\n"
"The first argument is the physical size of the touchpad in mm.\n");
return 1;
}
@ -54,6 +56,10 @@ struct dimensions {
int top, bottom, left, right;
};
struct size {
int w, h;
};
static int
print_current_values(const struct dimensions *d)
{
@ -168,15 +174,20 @@ dmi_matchstr(struct libevdev *dev, char *match, size_t sz)
}
static void
print_udev_override_rule(struct libevdev *dev, const struct dimensions *dim) {
print_udev_override_rule(struct libevdev *dev,
const struct dimensions *dim,
const struct size *size) {
const struct input_absinfo *x, *y;
char match[PATH_MAX];
int w, h;
int xres, yres;
x = libevdev_get_abs_info(dev, ABS_X);
y = libevdev_get_abs_info(dev, ABS_Y);
w = x->maximum - x->minimum;
h = y->maximum - y->minimum;
xres = round((double)w/size->w);
yres = round((double)h/size->h);
if (x->resolution && y->resolution) {
printf("Touchpad size as listed by the kernel: %dx%dmm\n",
@ -185,9 +196,8 @@ print_udev_override_rule(struct libevdev *dev, const struct dimensions *dim) {
printf("Touchpad has no resolution, size unknown\n");
}
printf("Calculate resolution as:\n");
printf(" x axis: %d/<width in mm>\n", w);
printf(" y axis: %d/<height in mm>\n", h);
printf("User-specified touchpad size: %dx%dmm\n", size->w, size->h);
printf("Calculated ranges: %d/%d\n", w, h);
printf("\n");
printf("Suggested udev rule:\n");
@ -203,16 +213,16 @@ print_udev_override_rule(struct libevdev *dev, const struct dimensions *dim) {
printf("# <Laptop model description goes here>\n"
"evdev:%s*\n"
" EVDEV_ABS_00=%d:%d:<x resolution>\n"
" EVDEV_ABS_01=%d:%d:<y resolution>\n",
" EVDEV_ABS_00=%d:%d:%d\n"
" EVDEV_ABS_01=%d:%d:%d\n",
match,
dim->left, dim->right,
dim->top, dim->bottom);
dim->left, dim->right, xres,
dim->top, dim->bottom, yres);
if (libevdev_has_event_code(dev, EV_ABS, ABS_MT_POSITION_X))
printf(" EVDEV_ABS_35=%d:%d:<x resolution>\n"
" EVDEV_ABS_36=%d:%d:<y resolution>\n",
dim->left, dim->right,
dim->top, dim->bottom);
printf(" EVDEV_ABS_35=%d:%d:%d\n"
" EVDEV_ABS_36=%d:%d:%d\n",
dim->left, dim->right, xres,
dim->top, dim->bottom, yres);
}
int main (int argc, char **argv) {
@ -221,11 +231,16 @@ int main (int argc, char **argv) {
const char *path;
struct libevdev *dev;
struct dimensions dim;
struct size size;
if (argc < 2)
if (argc < 3)
return usage();
path = argv[1];
if (sscanf(argv[1], "%dx%d", &size.w, &size.h) != 2 ||
size.w <= 0 || size.h <= 0)
return usage();
path = argv[2];
if (path[0] == '-')
return usage();
@ -273,7 +288,7 @@ int main (int argc, char **argv) {
rc = mainloop(dev, &dim);
printf("\n\n");
print_udev_override_rule(dev, &dim);
print_udev_override_rule(dev, &dim, &size);
out:
libevdev_free(dev);