Changeset ec3b125 in mainline

Timestamp:

2011-12-26T16:12:12Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2552f05f

Parents:

d56ab85

Message:

ps2mouse: Fix relative movement formula.

File:

• uspace/drv/char/ps2mouse/ps2mouse.c (modified) (1 diff)

uspace/drv/char/ps2mouse/ps2mouse.c

@@ -174 +174 @@
                         }
                 }
-
-                const int move_x = packet[1] * ((packet[0] & X_SIGN) ? -1 : 1);
-                const int move_y = packet[2] * ((packet[0] & Y_SIGN) ? 1 : -1);
+                /* Movement */
+                const int move_x = ((packet[0] & X_SIGN)
+                    ? (int)(int8_t)packet[1] : (int)packet[1]);
+                const int move_y = -((packet[0] & Y_SIGN)
+                    ? (int)(int8_t)packet[2] : (int)packet[2]);
                 if (move_x != 0 || move_y != 0) {
                         async_msg_2(exch, MOUSEEV_MOVE_EVENT, move_x, move_y);