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From 99e29cb2206d1c5a43c3035098ae1a7f434b9b8f Mon Sep 17 00:00:00 2001
From: fonic <fonic.maxxim@live.com>
Date: Mon, 28 Aug 2017 15:30:02 +0200
Subject: [PATCH] Add support for VirtualBox guests This adds support for the
'USB Tablet' absolute pointing device emulated by VirtualBox. This enables
Linux guests to seamlessly integrate, i.e. the pointer doesn't have to be
captured by the guest anymore.
Pointer movement, all five buttons (two of them being mapped to 'middle') and both vertical and horizontal wheels are supported.
Vertical mouse wheel functionality could be verified using links in framebuffer mode. Horizontal wheel is untested due to the lack of a device with that feature.
---
src/mice.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/src/mice.c b/src/mice.c
index 6cbd491..00c69b9 100644
--- a/src/mice.c
+++ b/src/mice.c
@@ -254,6 +254,62 @@ static int M_evdev (Gpm_Event * state, unsigned char *data)
}
return 0;
}
+
+/*
+ * USB Tablet emulated by VirtualBox for seamless mouse integration
+ *
+ * The 'VirtualBox USB Tablet' is an absolute pointing device which
+ * uses values of range 0-32767 for both axes, reports five button
+ * states (left, right, middle, side, extra) and two wheel states
+ * (vertical, horizontal; both relative)
+ */
+#define VBOX_MAX 32767
+
+static int M_vbox (Gpm_Event * state, unsigned char *data)
+{
+ struct input_event thisevent;
+ (void) memcpy (&thisevent, data, sizeof (struct input_event));
+
+ state->dx = state->dy = 0;
+ state->wdx = state->wdy = 0;
+
+ // Pointer
+ if (thisevent.type == EV_ABS) {
+ if (thisevent.code == REL_X) {
+ state->x = thisevent.value * (win.ws_col+1) / VBOX_MAX;
+ realposx = thisevent.value * REALPOS_MAX / VBOX_MAX;
+ } else if (thisevent.code == REL_Y) {
+ state->y = thisevent.value * (win.ws_row+1) / VBOX_MAX;
+ realposy = thisevent.value * REALPOS_MAX / VBOX_MAX;
+ }
+
+ // Wheels
+ } else if (thisevent.type == EV_REL) {
+ if (thisevent.code == REL_WHEEL) {
+ //state->buttons ^= thisevent.value > 0 ? GPM_B_UP : GPM_B_DOWN;
+ //state->wdy = thisevent.value > 0 ? +1 : -1;
+ state->wdy = thisevent.value;
+ } else if (thisevent.code == REL_HWHEEL) {
+ //state->buttons ^= thisevent.value > 0 ? GPM_B_RIGHT : GPM_B_LEFT;
+ //state->buttons ^= thisevent.value > 0 ? GPM_B_LEFT : GPM_B_RIGHT;
+ //state->wdx = thisevent.value > 0 ? +1 : -1;
+ //state->wdx = thisevent.value > 0 ? -1 : +1;
+ state->wdx = thisevent.value;
+ }
+
+ // Buttons
+ } else if (thisevent.type == EV_KEY) {
+ switch (thisevent.code) {
+ case BTN_LEFT: state->buttons ^= GPM_B_LEFT; break;
+ case BTN_MIDDLE: state->buttons ^= GPM_B_MIDDLE; break;
+ case BTN_RIGHT: state->buttons ^= GPM_B_RIGHT; break;
+ case BTN_SIDE: state->buttons ^= GPM_B_MIDDLE; break;
+ case BTN_EXTRA: state->buttons ^= GPM_B_MIDDLE; break;
+ }
+ }
+
+ return 0;
+}
#endif /* HAVE_LINUX_INPUT_H */
static int M_ms(Gpm_Event *state, unsigned char *data)
@@ -2404,6 +2460,9 @@ Gpm_Type mice[]={
{"evdev", "Linux Event Device",
"", M_evdev, I_empty, STD_FLG,
{0x00, 0x00, 0x00, 0x00} , 16, 16, 0, 0, NULL},
+ {"vbox", "For USB Tablet emulated by VirtualBox for mouse integration",
+ "", M_vbox, I_empty, STD_FLG,
+ {0x00, 0x00, 0x00, 0x00} , 24, 24, 0, 1, NULL},
#endif /* HAVE_LINUX_INPUT_H */
{"exps2", "IntelliMouse Explorer (ps2) - 3 buttons, wheel unused",
"ExplorerPS/2", M_imps2, I_exps2, STD_FLG,
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