Add code to track 5 valuators for pointing device, in preparation

for supporting tablet input in Xquartz.
(cherry picked from commit 22c8849ea819eb70a14b2e06330b11b22aa63ebc)

hw/xquartz/X11Application.m

@@ -61,7 +61,7 @@ int X11EnableKeyEquivalents = TRUE;
 int quartzHasRoot = FALSE, quartzEnableRootless = TRUE;
 
 extern int darwinFakeButtons, input_check_flag;
-extern Bool enable_stereo; 
+extern Bool enable_stereo;
 
 extern xEvent *darwinEvents;
 
@@ -153,7 +153,7 @@ static void message_kit_thread (SEL selector, NSObject *arg) {
 	
     tem = [infoDict objectForKey:@"CFBundleShortVersionString"];
 	
-    [dict setObject:[NSString stringWithFormat:@"Xquartz %@ - (xorg-server %s)", tem, XSERVER_VERSION] 
+    [dict setObject:[NSString stringWithFormat:@"XQuartz %@ - (xorg-server %s)", tem, XSERVER_VERSION]
 	  forKey:@"ApplicationVersion"];
 	
     [self orderFrontStandardAboutPanelWithOptions: dict];
@@ -501,7 +501,7 @@ static NSMutableArray * cfarray_to_nsarray (CFArrayRef in) {
   
   if (value != NULL
       && CFGetTypeID (value) == CFNumberGetTypeID ()
-      && CFNumberIsFloatType (value)) 
+      && CFNumberIsFloatType (value))
     CFNumberGetValue (value, kCFNumberFloatType, &ret);
   else if (value != NULL && CFGetTypeID (value) == CFStringGetTypeID ())
     ret = CFStringGetDoubleValue (value);
@@ -862,7 +862,9 @@ static void send_nsevent (NSEventType type, NSEvent *e) {
     NSRect screen;
     NSPoint location;
     NSWindow *window;
-    int pointer_x, pointer_y, ev_button, ev_type; 
+    int pointer_x, pointer_y, ev_button, ev_type;
+    float pressure, tilt_x, tilt_y;
+
     //    int num_events=0, i=0, state;
     // xEvent xe;
 	
@@ -884,6 +886,10 @@ static void send_nsevent (NSEventType type, NSEvent *e) {
     pointer_y -= aquaMenuBarHeight;
     //    state = convert_flags ([e modifierFlags]);
     
+    pressure = 0;  // for tablets
+    tilt_x = 0;
+    tilt_y = 0;
+
     switch (type) {
     case NSLeftMouseDown:    ev_button=1; ev_type=ButtonPress; goto handle_mouse;
     case NSOtherMouseDown:   ev_button=2; ev_type=ButtonPress; goto handle_mouse;
@@ -894,6 +900,10 @@ static void send_nsevent (NSEventType type, NSEvent *e) {
     case NSLeftMouseDragged:  ev_button=1; ev_type=MotionNotify; goto handle_mouse;
     case NSOtherMouseDragged: ev_button=2; ev_type=MotionNotify; goto handle_mouse;
     case NSRightMouseDragged: ev_button=3; ev_type=MotionNotify; goto handle_mouse;
+    case NSTabletPoint:
+      pressure = [e pressure];
+      tilt_x = [e tilt].x;
+      tilt_y = [e tilt].y; // fall through
     case NSMouseMoved: ev_button=0; ev_type=MotionNotify; goto handle_mouse;
     handle_mouse:
       
@@ -907,10 +917,14 @@ static void send_nsevent (NSEventType type, NSEvent *e) {
 	DarwinSendPointerEvents(ev_type, ev_button, pointer_x, pointer_y);
       } else if (ev_type==ButtonRelease && (button_state & (1 << ev_button)) == 0) break;
       */
-      DarwinSendPointerEvents(ev_type, ev_button, pointer_x, pointer_y);
+
+      //      if ([e subtype] == NSTabletPointEventSubtype) pressure = [e pressure];
+      DarwinSendPointerEvents(ev_type, ev_button, pointer_x, pointer_y,
+			      pressure, tilt_x, tilt_y);
       break;
-    case NSScrollWheel: 
+    case NSScrollWheel:
-      DarwinSendScrollEvents([e deltaY], pointer_x, pointer_y);
+      DarwinSendScrollEvents([e deltaY], pointer_x, pointer_y,
+			     pressure, tilt_x, tilt_y);
       break;
       
     case NSKeyDown:  // do we need to translate these keyCodes?

hw/xquartz/darwinEvents.c

@@ -173,6 +173,9 @@ static void DarwinReleaseModifiers(void) {
 static void DarwinSimulateMouseClick(
     int pointer_x,
     int pointer_y,
+    float pressure,
+    float tilt_x,
+    float tilt_y,
     int whichButton,    // mouse button to be pressed
     int modifierMask)   // modifiers used for the fake click
 {
@@ -183,8 +186,10 @@ static void DarwinSimulateMouseClick(
     DarwinUpdateModifiers(KeyRelease, modifierMask);
 
     // push the mouse button
-    DarwinSendPointerEvents(ButtonPress, whichButton, pointer_x, pointer_y);
+    DarwinSendPointerEvents(ButtonPress, whichButton, pointer_x, pointer_y, 
-    DarwinSendPointerEvents(ButtonRelease, whichButton, pointer_x, pointer_y);
+			    pressure, tilt_x, tilt_y);
+    DarwinSendPointerEvents(ButtonRelease, whichButton, pointer_x, pointer_y, 
+			    pressure, tilt_x, tilt_y);
 
     // restore old modifiers
     DarwinUpdateModifiers(KeyPress, modifierMask);
@@ -378,22 +383,39 @@ void DarwinPokeEQ(void) {
   write(darwinEventWriteFD, &nullbyte, 1);
 }
 
-void DarwinSendPointerEvents(int ev_type, int ev_button, int pointer_x, int pointer_y) {
+void DarwinSendPointerEvents(int ev_type, int ev_button, int pointer_x, int pointer_y, 
+			     float pressure, float tilt_x, float tilt_y) {
   static int darwinFakeMouseButtonDown = 0;
   static int darwinFakeMouseButtonMask = 0;
   int i, num_events;
-  int valuators[2] = {pointer_x, pointer_y};
+
+  /* I can't find a spec for this, but at least GTK expects that tablets are
+     just like mice, except they have either one or three extra valuators, in this
+     order:
+     
+     X coord, Y coord, pressure, X tilt, Y tilt
+     Pressure and tilt should be represented natively as floats; unfortunately,
+     we can't do that.  Again, GTK seems to record the min/max of each valuator,
+     and then perform scaling back to float itself using that info. Soo.... */
+
+  int valuators[5] = {pointer_x, pointer_y, 
+		      pressure * INT32_MAX * 1.0f, 
+		      tilt_x * INT32_MAX * 1.0f, 
+		      tilt_y * INT32_MAX * 1.0f};
+
   if (ev_type == ButtonPress && darwinFakeButtons && ev_button == 1) {
     // Mimic multi-button mouse with modifier-clicks
     // If both sets of modifiers are pressed,
     // button 2 is clicked.
     if ((old_flags & darwinFakeMouse2Mask) == darwinFakeMouse2Mask) {
-      DarwinSimulateMouseClick(pointer_x, pointer_y, 2, darwinFakeMouse2Mask);
+      DarwinSimulateMouseClick(pointer_x, pointer_y, pressure, 
+			       tilt_x, tilt_y, 2, darwinFakeMouse2Mask);
       darwinFakeMouseButtonDown = 2;
       darwinFakeMouseButtonMask = darwinFakeMouse2Mask;
       return;
     } else if ((old_flags & darwinFakeMouse3Mask) == darwinFakeMouse3Mask) {
-      DarwinSimulateMouseClick(pointer_x, pointer_y, 3, darwinFakeMouse3Mask);
+      DarwinSimulateMouseClick(pointer_x, pointer_y, pressure, 
+			       tilt_x, tilt_y, 3, darwinFakeMouse3Mask);
       darwinFakeMouseButtonDown = 3;
       darwinFakeMouseButtonMask = darwinFakeMouse3Mask;
       return;
@@ -412,7 +434,7 @@ void DarwinSendPointerEvents(int ev_type, int ev_button, int pointer_x, int poin
   } 
 
   num_events = GetPointerEvents(darwinEvents, darwinPointer, ev_type, ev_button, 
-				POINTER_ABSOLUTE, 0, 2, valuators);
+				POINTER_ABSOLUTE, 0, 5, valuators);
       
   for(i=0; i<num_events; i++) mieqEnqueue (darwinPointer,&darwinEvents[i]);
   DarwinPokeEQ();
@@ -438,18 +460,38 @@ void DarwinSendKeyboardEvents(int ev_type, int keycode) {
   DarwinPokeEQ();
 }
 
+void DarwinSendProximityEvents(int ev_type, int pointer_x, int pointer_y, 
+			       float pressure, float tilt_x, float tilt_y) {
+  int i, num_events;
+  int valuators[5] = {pointer_x, pointer_y, 
+		      pressure * INT32_MAX * 1.0f, 
+		      tilt_x * INT32_MAX * 1.0f, 
+		      tilt_y * INT32_MAX * 1.0f};
+
+  num_events = GetProximityEvents(darwinEvents, darwinPointer, ev_type,
+				0, 5, valuators);
+      
+  for(i=0; i<num_events; i++) mieqEnqueue (darwinPointer,&darwinEvents[i]);
+  DarwinPokeEQ();
+}
+
+
 /* Send the appropriate number of button 4 / 5 clicks to emulate scroll wheel */
-void DarwinSendScrollEvents(float count, int pointer_x, int pointer_y) {
+void DarwinSendScrollEvents(float count, int pointer_x, int pointer_y, 
+			    float pressure, float tilt_x, float tilt_y) {
   int i;
   int ev_button = count > 0.0f ? 4 : 5;
-  int valuators[2] = {pointer_x, pointer_y};
+  int valuators[5] = {pointer_x, pointer_y, 
+		      pressure * INT32_MAX * 1.0f, 
+		      tilt_x * INT32_MAX * 1.0f, 
+		      tilt_y * INT32_MAX * 1.0f};
 
   for (count = fabs(count); count > 0.0; count = count - 1.0f) {
     int num_events = GetPointerEvents(darwinEvents, darwinPointer, ButtonPress, ev_button, 
-				      POINTER_ABSOLUTE, 0, 2, valuators);
+				      POINTER_ABSOLUTE, 0, 5, valuators);
     for(i=0; i<num_events; i++) mieqEnqueue(darwinPointer,&darwinEvents[i]);
     num_events = GetPointerEvents(darwinEvents, darwinPointer, ButtonRelease, ev_button, 
-				      POINTER_ABSOLUTE, 0, 2, valuators);
+				      POINTER_ABSOLUTE, 0, 5, valuators);
     for(i=0; i<num_events; i++) mieqEnqueue(darwinPointer,&darwinEvents[i]);
   }
   DarwinPokeEQ();

hw/xquartz/darwinEvents.h

@@ -32,9 +32,13 @@ void DarwinEQEnqueue(const xEventPtr e);
 void DarwinEQPointerPost(DeviceIntPtr pDev, xEventPtr e);
 void DarwinEQSwitchScreen(ScreenPtr pScreen, Bool fromDIX);
 void DarwinPokeEQ(void);
-void DarwinSendPointerEvents(int ev_type, int ev_button, int pointer_x, int pointer_y);
+void DarwinSendPointerEvents(int ev_type, int ev_button, int pointer_x, int pointer_y,
+			     float pressure, float tilt_x, float tilt_y);
+void DarwinSendProximityEvents(int ev_type, int pointer_x, int pointer_y, 
+			       float pressure, float tilt_x, float tilt_y);
 void DarwinSendKeyboardEvents(int ev_type, int keycode);
-void DarwinSendScrollEvents(float count, int pointer_x, int pointer_y);
+void DarwinSendScrollEvents(float count, int pointer_x, int pointer_y,
+			    float pressure, float tilt_x, float tilt_y);
 void DarwinUpdateModKeys(int flags);
 
 #endif  /* _DARWIN_EVENTS_H */