Make onNativePen available for Android

android-project/app/src/main/java/org/libsdl/app/SDLActivity.java

@@ -1059,6 +1059,7 @@ public class SDLActivity extends Activity implements View.OnSystemUiVisibilityCh
     public static native void onNativeTouch(int touchDevId, int pointerFingerId,
                                             int action, float x,
                                             float y, float p);
+    public static native void onNativePen(int penId, int button, int action, float x, float y, float p);
     public static native void onNativeAccel(float x, float y, float z);
     public static native void onNativeClipboardChanged();
     public static native void onNativeSurfaceCreated();

src/core/android/SDL_android.c

@@ -28,6 +28,7 @@
 #include "../../video/android/SDL_androidkeyboard.h"
 #include "../../video/android/SDL_androidmouse.h"
 #include "../../video/android/SDL_androidtouch.h"
+#include "../../video/android/SDL_androidpen.h"
 #include "../../video/android/SDL_androidvideo.h"
 #include "../../video/android/SDL_androidwindow.h"
 #include "../../joystick/android/SDL_sysjoystick_c.h"
@@ -118,6 +119,10 @@ JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeMouse)(
     JNIEnv *env, jclass jcls,
     jint button, jint action, jfloat x, jfloat y, jboolean relative);
 
+JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativePen)(
+    JNIEnv *env, jclass jcls,
+    jint pen_id_in, jint button, jint action, jfloat x, jfloat y, jfloat p);
+
 JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeAccel)(
     JNIEnv *env, jclass jcls,
     jfloat x, jfloat y, jfloat z);
@@ -209,6 +214,7 @@ static JNINativeMethod SDLActivity_tab[] = {
     { "onNativeKeyboardFocusLost", "()V", SDL_JAVA_INTERFACE(onNativeKeyboardFocusLost) },
     { "onNativeTouch", "(IIIFFF)V", SDL_JAVA_INTERFACE(onNativeTouch) },
     { "onNativeMouse", "(IIFFZ)V", SDL_JAVA_INTERFACE(onNativeMouse) },
+    { "onNativePen", "(IIIFFF)V", SDL_JAVA_INTERFACE(onNativePen) },
     { "onNativeAccel", "(FFF)V", SDL_JAVA_INTERFACE(onNativeAccel) },
     { "onNativeClipboardChanged", "()V", SDL_JAVA_INTERFACE(onNativeClipboardChanged) },
     { "nativeLowMemory", "()V", SDL_JAVA_INTERFACE(nativeLowMemory) },
@@ -1362,6 +1368,18 @@ JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeMouse)(
     SDL_UnlockMutex(Android_ActivityMutex);
 }
 
+// Pen
+JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativePen)(
+    JNIEnv *env, jclass jcls,
+    jint pen_id_in, jint button, jint action, jfloat x, jfloat y, jfloat p)
+{
+    SDL_LockMutex(Android_ActivityMutex);
+
+    Android_OnPen(Android_Window, pen_id_in, button, action, x, y, p);
+
+    SDL_UnlockMutex(Android_ActivityMutex);
+}
+
 // Accelerometer
 JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(onNativeAccel)(
     JNIEnv *env, jclass jcls,