Vita: add hint to select which touchpad generates mouse events

include/SDL_hints.h

@@ -1354,6 +1354,18 @@ extern "C" {
  */
 #define SDL_HINT_TOUCH_MOUSE_EVENTS    "SDL_TOUCH_MOUSE_EVENTS"
 
+/**
+ *  \brief  A variable controlling which touchpad should generate synthetic mouse events
+ *
+ *  This variable can be set to the following values:
+ *    "0"       - Only front touchpad should generate mouse events. Default
+ *    "1"       - Only back touchpad should generate mouse events.
+ *    "2"       - Both touchpads should generate mouse events.
+ *
+ *  By default SDL will generate mouse events for all touch devices
+ */
+#define SDL_HINT_VITA_TOUCH_MOUSE_DEVICE    "SDL_HINT_VITA_TOUCH_MOUSE_DEVICE"
+
 /**
  *  \brief  A variable controlling whether the Android / tvOS remotes
  *  should be listed as joystick devices, instead of sending keyboard events.

src/events/SDL_mouse.c

@@ -109,6 +109,28 @@ SDL_TouchMouseEventsChanged(void *userdata, const char *name, const char *oldVal
     mouse->touch_mouse_events = SDL_GetStringBoolean(hint, SDL_TRUE);
 }
 
+#if defined(__vita__)
+static void SDLCALL
+SDL_VitaTouchMouseDeviceChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
+{
+    SDL_Mouse *mouse = (SDL_Mouse *)userdata;
+    if (hint) {
+        switch(*hint) {
+        default:
+        case '0':
+            mouse->vita_touch_mouse_device = 0;
+            break;
+        case '1':
+            mouse->vita_touch_mouse_device = 1;
+            break;
+        case '2':
+            mouse->vita_touch_mouse_device = 2;
+            break;
+        }
+    }
+}
+#endif
+
 static void SDLCALL
 SDL_MouseTouchEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
 {
@@ -166,6 +188,11 @@ SDL_MouseInit(void)
     SDL_AddHintCallback(SDL_HINT_TOUCH_MOUSE_EVENTS,
                         SDL_TouchMouseEventsChanged, mouse);
 
+#if defined(__vita__)
+    SDL_AddHintCallback(SDL_HINT_VITA_TOUCH_MOUSE_DEVICE,
+                        SDL_VitaTouchMouseDeviceChanged, mouse);
+#endif
+
     SDL_AddHintCallback(SDL_HINT_MOUSE_TOUCH_EVENTS,
                         SDL_MouseTouchEventsChanged, mouse);
 

src/events/SDL_mouse_c.h

@@ -100,6 +100,9 @@ typedef struct
     SDL_bool touch_mouse_events;
     SDL_bool mouse_touch_events;
     SDL_bool was_touch_mouse_events; /* Was a touch-mouse event pending? */
+#if defined(__vita__)
+    Uint8 vita_touch_mouse_device;
+#endif
     SDL_bool auto_capture;
 
     /* Data for input source state */

src/events/SDL_touch.c

@@ -265,8 +265,13 @@ SDL_SendTouch(SDL_TouchID id, SDL_FingerID fingerid, SDL_Window * window,
 
 #if SYNTHESIZE_TOUCH_TO_MOUSE
     /* SDL_HINT_TOUCH_MOUSE_EVENTS: controlling whether touch events should generate synthetic mouse events */
+    /* SDL_HINT_VITA_TOUCH_MOUSE_DEVICE: controlling which touchpad should generate synthetic mouse events, PSVita-only */
     {
+#if defined(__vita__)
+        if (mouse->touch_mouse_events && ((mouse->vita_touch_mouse_device == id) || (mouse->vita_touch_mouse_device == 2)) ) {
+#else
         if (mouse->touch_mouse_events) {
+#endif
             /* FIXME: maybe we should only restrict to a few SDL_TouchDeviceType */
             if (id != SDL_MOUSE_TOUCHID) {
                 if (window) {