dix:

merge with code cleanup from master
        GetPointerEvents treats events in the same way as XINPUT devices when flag
        has POINTER_MULTIPOINTER set.

xfree86/common:
    added XI86_MP_DEVICE flag and parsing in xf86ProcessCommonOptions
    added POINTER_MULTIPOINTER define. Is used in xf86PostMotionEvent and
    xf86PostButtonEvent for the flags that are passed into GetPointerEvents()

global:
    added flags to configure.ac to enable/disable MPX define
    added flags to dix-config.h.in to define MPX

Changelog

@@ -0,0 +1,25 @@
+MPX Changelog file
+
+== 16.11.06 ==
+dix: 
+        merge with code cleanup from master
+        GetPointerEvents treats events in the same way as XINPUT devices when flag
+        has POINTER_MULTIPOINTER set.
+
+xfree86/common:
+    added XI86_MP_DEVICE flag and parsing in xf86ProcessCommonOptions
+    added POINTER_MULTIPOINTER define. Is used in xf86PostMotionEvent and
+    xf86PostButtonEvent for the flags that are passed into GetPointerEvents()
+
+global:
+    added flags to configure.ac to enable/disable MPX define
+    added flags to dix-config.h.in to #define MPX
+
+Files:
+        dix/getevents.c
+        hw/xfree86/common/xf86Xinput.c
+        hw/xfree86/common/xf86Xinput.h
+        include/input.h
+        configure.ac
+        include/dix-config.h.in
+

configure.ac

@@ -421,6 +421,7 @@ AC_ARG_ENABLE(builtin-fonts,  AS_HELP_STRING([--enable-builtin-fonts], [Use only
 AC_ARG_ENABLE(null-root-cursor, AS_HELP_STRING([--enable-null-root-cursor], [Use an empty root cursor (default: use core cursor)]),
                                  [NULL_ROOT_CURSOR=$enableval],
                                  [NULL_ROOT_CURSOR=no])
+AC_ARG_ENABLE(mpx,            AS_HELP_STRING([--disable-mpx], [Disable MPX multipointer support (Default: enabled)]), [MPX=$enableval], [MPX=yes])
 
 dnl Extensions.
 AC_ARG_ENABLE(composite,      AS_HELP_STRING([--disable-composite], [Build Composite extension (default: enabled)]), [COMPOSITE=$enableval], [COMPOSITE=yes])
@@ -783,6 +784,14 @@ AC_DEFINE(XINPUT, 1, [Support X Input extension])
 XI_LIB='$(top_builddir)/Xi/libXi.la'
 XI_INC='-I$(top_srcdir)/Xi'
 
+dnl Enable MPX multipointer  extension
+AC_MSG_CHECKING([whether to use MPX extension])
+AC_MSG_RESULT([$MPX])
+AM_CONDITIONAL(MPX, [test "x$MPX" = xyes])
+
+if test "x$MPX" = xyes; then
+    AC_DEFINE(MPX, 1, [Support MPX multipointer extension])
+fi
 AM_CONDITIONAL(XF86UTILS, test "x$XF86UTILS" = xyes)
 
 AC_DEFINE(SHAPE, 1, [Support SHAPE extension])

dix/getevents.c

@@ -21,6 +21,15 @@
  *
  * Author: Daniel Stone <daniel@fooishbar.org>
  */
+#ifdef MPX
+ /* 
+  * MPX additions:
+  * Copyright © 2006 Peter Hutterer
+  * License see above.
+  * Author: Peter Hutterer <peter@cs.unisa.edu.au>
+  *
+  */
+#endif
 
 #ifdef HAVE_DIX_CONFIG_H
 #include <dix-config.h>
@@ -480,6 +489,11 @@ GetKeyboardValuatorEvents(xEvent *events, DeviceIntPtr pDev, int type,
  * The DDX is responsible for allocating the event structure in the first
  * place via GetMaximumEventsNum(), and for freeing it.
  */
+#ifdef MPX
+ /* In MPX, flags can be set to POINTER_MULTIPOINTER to indicate that the
+  * device is a multipointer device. MP devices always send core events.
+  */
+#endif
 _X_EXPORT int
 GetPointerEvents(xEvent *events, DeviceIntPtr pDev, int type, int buttons,
                  int flags, int first_valuator, int num_valuators,
@@ -525,6 +539,11 @@ GetPointerEvents(xEvent *events, DeviceIntPtr pDev, int type, int buttons,
     kbp->time = ms;
     kbp->deviceid = pDev->id;
 
+#ifdef MPX
+    if (flags & POINTER_MULTIPOINTER)
+        pointer = pDev;
+    else
+#endif
     if (pDev->coreEvents)
         pointer = inputInfo.pointer;
     else
@@ -581,6 +600,12 @@ GetPointerEvents(xEvent *events, DeviceIntPtr pDev, int type, int buttons,
 
     updateMotionHistory(pDev, ms, first_valuator, num_valuators, valuators);
 
+#ifdef MPX
+    if (flags & POINTER_MULTIPOINTER)
+    {
+        // noop, just to fit MPX in easier with the following if
+    } else
+#endif
     if (pDev->coreEvents) {
         /* set the virtual core pointer's coordinates */
         pointer->valuator->lastx = x;

hw/xfree86/common/xf86Xinput.c

@@ -47,6 +47,17 @@
  */
 /* $XConsortium: xf86Xinput.c /main/14 1996/10/27 11:05:25 kaleb $ */
 
+#ifdef MPX
+ /* 
+  * MPX additions:
+  * Copyright © 2006 Peter Hutterer
+  * License see above.
+  * Author: Peter Hutterer <peter@cs.unisa.edu.au>
+  *
+  */
+#endif
+
+
 #ifdef HAVE_XORG_CONFIG_H
 #include <xorg-config.h>
 #endif
@@ -133,6 +144,13 @@ xf86ProcessCommonOptions(LocalDevicePtr local,
         xf86Msg(X_CONFIG, "%s: always reports core events\n", local->name);
     }
 
+#ifdef MPX
+    if (xf86SetBoolOption(list, "IsMPDevice", 0)) {
+        local->flags |= XI86_MP_DEVICE;
+        xf86Msg(X_CONFIG, "%s: is MP device\n", local->name);
+    }
+#endif
+
     if (xf86SetBoolOption(list, "SendDragEvents", 1)) {
         local->flags |= XI86_SEND_DRAG_EVENTS;
     } else {
@@ -196,6 +214,9 @@ xf86ActivateDevice(LocalDevicePtr local)
         xf86XinputFinalizeInit(dev);
 
         dev->coreEvents = local->flags & XI86_ALWAYS_CORE;
+#ifdef MPX
+        dev->coreEvents |= local->flags & XI86_MP_DEVICE;
+#endif
         RegisterOtherDevice(dev);
 
         if (serverGeneration == 1) 
@@ -441,6 +462,11 @@ xf86PostMotionEvent(DeviceIntPtr	device,
         flags = POINTER_ABSOLUTE;
     else
         flags = POINTER_RELATIVE | POINTER_ACCELERATE;
+
+#ifdef MPX
+    if (device->coreEvents & XI86_MP_DEVICE)
+        flags |= POINTER_MULTIPOINTER;
+#endif
     
     valuators = xcalloc(sizeof(int), num_valuators);
 
@@ -507,6 +533,17 @@ xf86PostButtonEvent(DeviceIntPtr	device,
     va_list var;
     int *valuators = NULL;
     int i = 0, nevents = 0;
+    int flags = 0;
+
+    if (is_absolute)
+        flags = POINTER_ABSOLUTE;
+    else
+        flags = POINTER_RELATIVE;
+
+#ifdef MPX
+    if (device->coreEvents & XI86_MP_DEVICE)
+        flags |= POINTER_MULTIPOINTER;
+#endif
     
     valuators = xcalloc(sizeof(int), num_valuators);
 
@@ -522,8 +559,7 @@ xf86PostButtonEvent(DeviceIntPtr	device,
 
     nevents = GetPointerEvents(xf86Events, device,
                                is_down ? ButtonPress : ButtonRelease, button,
-                               is_absolute ? POINTER_ABSOLUTE :
+                               flags,
-                                             POINTER_RELATIVE,
                                first_valuator, num_valuators, valuators);
 
     for (i = 0; i < nevents; i++)

hw/xfree86/common/xf86Xinput.h

@@ -83,6 +83,10 @@
 #define XI86_POINTER_CAPABLE	0x40 /* capable of being a core pointer */
 #define XI86_KEYBOARD_CAPABLE	0x80 /* capable of being a core keyboard */
 
+#ifdef MPX
+#define XI86_MP_DEVICE 0x100 /* device is multipointer device */
+#endif
+
 #define XI_PRIVATE(dev) \
 	(((LocalDevicePtr)((dev)->public.devicePrivate))->private)
 

include/dix-config.h.in

@@ -347,6 +347,9 @@
 /* Support X Input extension */
 #undef XINPUT
 
+/* Support MPX multipointer extension */
+#undef MPX
+
 /* Build XKB */
 #undef XKB
 

include/input.h

@@ -62,6 +62,9 @@ SOFTWARE.
 #define POINTER_RELATIVE (1 << 1)
 #define POINTER_ABSOLUTE (1 << 2)
 #define POINTER_ACCELERATE (1 << 3)
+#ifdef MPX
+#define POINTER_MULTIPOINTER (1 << 4)
+#endif
 
 #define MAP_LENGTH	256
 #define DOWN_LENGTH	32	/* 256/8 => number of bytes to hold 256 bits */