[arch-commits] Commit in libinput/trunk (2 files)

[Laurent Carlier]

    Date: Tuesday, June 9, 2015 @ 13:56:10
  Author: lcarlier
Revision: 240445

upgpkg: libinput 0.17.0-2

improve handling of slow mouse movements

Added:
  libinput/trunk/0001-filter-require-minimum-acceleration-factor-of-0.3.patch
Modified:
  libinput/trunk/PKGBUILD

--------------------------------------------------------------+
 0001-filter-require-minimum-acceleration-factor-of-0.3.patch |   52 ++++++++++
 PKGBUILD                                                     |   13 +-
 2 files changed, 62 insertions(+), 3 deletions(-)

Added: 0001-filter-require-minimum-acceleration-factor-of-0.3.patch
===================================================================
--- 0001-filter-require-minimum-acceleration-factor-of-0.3.patch	                        (rev 0)
+++ 0001-filter-require-minimum-acceleration-factor-of-0.3.patch	2015-06-09 11:56:10 UTC (rev 240445)
@@ -0,0 +1,52 @@
+From f6313a9d010f03a66fd1f68e0bbd5e073101f342 Mon Sep 17 00:00:00 2001
+From: Peter Hutterer <peter.hutterer at who-t.net>
+Date: Thu, 4 Jun 2015 11:40:15 +1000
+Subject: [PATCH libinput] filter: require minimum acceleration factor of 0.3
+
+For really slow motions, the previous acceleration factor would go down to
+effectively zero. So the slower the mouse motion was, the more it would be
+slowed down which made the mouse at low speeds almost unusable.
+
+Cap the minimum acceleration at 0.3 which provides a predictable slow motion
+for the cursor when high precision is required.
+
+New/old acceleration functions comparison:
+
+  ^
+  |               /
+  |              /
+ty|    _________/
+  |   / /
+  |  / /
+  | / /
+  |/ /    <----- new minimum accel factor
+  | /
+  |/___________________>
+      tx
+
+i.e. the general shape is maintained, but it doesn't go to zero anymore. The
+functions aren't parallel, the new shape is slightly flatter than the previous
+one and they meet at the point where the functions flatten for the threshold
+(tx/ty). ascii art has its limits...
+
+Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
+---
+ src/filter.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/filter.c b/src/filter.c
+index c54d866..ed5a184 100644
+--- a/src/filter.c
++++ b/src/filter.c
+@@ -354,7 +354,7 @@ pointer_accel_profile_linear(struct motion_filter *filter,
+ 	const double threshold = accel_filter->threshold; /* units/ms */
+ 	const double incline = accel_filter->incline;
+ 
+-	s1 = min(1, speed_in * 5);
++	s1 = min(1, 0.3 + speed_in * 4);
+ 	s2 = 1 + (speed_in - threshold) * incline;
+ 
+ 	return min(max_accel, s2 > 1 ? s2 : s1);
+-- 
+2.4.1
+

Modified: PKGBUILD
===================================================================
--- PKGBUILD	2015-06-09 11:52:06 UTC (rev 240444)
+++ PKGBUILD	2015-06-09 11:56:10 UTC (rev 240445)
@@ -4,7 +4,7 @@
 
 pkgname=libinput
 pkgver=0.17.0
-pkgrel=1
+pkgrel=2
 pkgdesc="library that handles input devices for display servers and other applications that need to directly deal with input devices."
 arch=(i686 x86_64)
 url="http://www.freedesktop.org/wiki/Software/libinput/"
@@ -12,11 +12,18 @@
 depends=('mtdev' 'systemd' 'libevdev')
 install=libinput.install
 options=('!libtool')
-source=(http://freedesktop.org/software/$pkgname/$pkgname-$pkgver.tar.xz{,.sig})
+source=(http://freedesktop.org/software/$pkgname/$pkgname-$pkgver.tar.xz{,.sig}
+        0001-filter-require-minimum-acceleration-factor-of-0.3.patch)
 sha256sums=('b7db243be3a745c1031b364f3595ce9bb31347f874b7299ef8d44c98d2fb28db'
-            'SKIP')
+            'SKIP'
+            '8d0fbee0669cdf6ad1318dcdb859efb59f6fb94d92e244fd71dd57a00fbda82b')
 validpgpkeys=('3C2C43D9447D5938EF4551EBE23B7E70B467F0BF') # Peter Hutterer (Who-T) <office at who-t.net>
 
+prepare() {
+  cd $pkgname-$pkgver
+  patch -Np1 -i ../0001-filter-require-minimum-acceleration-factor-of-0.3.patch
+}
+
 build() {
   cd $pkgname-$pkgver
   ./configure --prefix=/usr --disable-static