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-rw-r--r--tmk_core/protocol/ps2_mouse.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/tmk_core/protocol/ps2_mouse.c b/tmk_core/protocol/ps2_mouse.c
index 525aeb45a0..39251a6434 100644
--- a/tmk_core/protocol/ps2_mouse.c
+++ b/tmk_core/protocol/ps2_mouse.c
@@ -156,8 +156,15 @@ static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report)
mouse_report->x = X_IS_NEG ? ((!X_IS_OVF && -127 <= mouse_report->x && mouse_report->x <= -1) ? mouse_report->x : -127) : ((!X_IS_OVF && 0 <= mouse_report->x && mouse_report->x <= 127) ? mouse_report->x : 127);
mouse_report->y = Y_IS_NEG ? ((!Y_IS_OVF && -127 <= mouse_report->y && mouse_report->y <= -1) ? mouse_report->y : -127) : ((!Y_IS_OVF && 0 <= mouse_report->y && mouse_report->y <= 127) ? mouse_report->y : 127);
+#ifdef PS2_MOUSE_INVERT_BUTTONS
+ // swap left & right buttons
+ uint8_t needs_left = mouse_report->buttons & PS2_MOUSE_BTN_RIGHT;
+ uint8_t needs_right = mouse_report->buttons & PS2_MOUSE_BTN_LEFT;
+ mouse_report->buttons = (mouse_report->buttons & ~(PS2_MOUSE_BTN_MASK)) | (needs_left ? PS2_MOUSE_BTN_LEFT : 0) | (needs_right ? PS2_MOUSE_BTN_RIGHT : 0);
+#else
// remove sign and overflow flags
mouse_report->buttons &= PS2_MOUSE_BTN_MASK;
+#endif
#ifdef PS2_MOUSE_INVERT_X
mouse_report->x = -mouse_report->x;