From 10daf1f4d328d607afd65fa22c202ae8ec58d449 Mon Sep 17 00:00:00 2001
From: Philipp Wiesemann <philipp.wiesemann@arcor.de>
Date: Sun, 27 Sep 2015 20:12:47 +0200
Subject: [PATCH] Android: Removed three internal functions not used by SDL.

They were not needed internally since the switch to the common EGL backend.

Thanks to the SDL mailing list for pointing out that the functions seem unused.
---
 .../src/org/libsdl/app/SDLActivity.java          |  8 --------
 src/core/android/SDL_android.c                   | 16 +---------------
 src/core/android/SDL_android.h                   |  5 +----
 3 files changed, 2 insertions(+), 27 deletions(-)

diff --git a/android-project/src/org/libsdl/app/SDLActivity.java b/android-project/src/org/libsdl/app/SDLActivity.java
index 9b733cf50..17133fbbf 100644
--- a/android-project/src/org/libsdl/app/SDLActivity.java
+++ b/android-project/src/org/libsdl/app/SDLActivity.java
@@ -427,20 +427,12 @@ public class SDLActivity extends Activity {
     public static native void onNativeAccel(float x, float y, float z);
     public static native void onNativeSurfaceChanged();
     public static native void onNativeSurfaceDestroyed();
-    public static native void nativeFlipBuffers();
     public static native int nativeAddJoystick(int device_id, String name,
                                                int is_accelerometer, int nbuttons,
                                                int naxes, int nhats, int nballs);
     public static native int nativeRemoveJoystick(int device_id);
     public static native String nativeGetHint(String name);
 
-    /**
-     * This method is called by SDL using JNI.
-     */
-    public static void flipBuffers() {
-        SDLActivity.nativeFlipBuffers();
-    }
-
     /**
      * This method is called by SDL using JNI.
      */
diff --git a/src/core/android/SDL_android.c b/src/core/android/SDL_android.c
index d7bb94ba7..be948d225 100644
--- a/src/core/android/SDL_android.c
+++ b/src/core/android/SDL_android.c
@@ -71,7 +71,6 @@ static jclass mActivityClass;
 
 /* method signatures */
 static jmethodID midGetNativeSurface;
-static jmethodID midFlipBuffers;
 static jmethodID midAudioInit;
 static jmethodID midAudioWriteShortBuffer;
 static jmethodID midAudioWriteByteBuffer;
@@ -119,8 +118,6 @@ JNIEXPORT void JNICALL SDL_Android_Init(JNIEnv* mEnv, jclass cls)
 
     midGetNativeSurface = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
                                 "getNativeSurface","()Landroid/view/Surface;");
-    midFlipBuffers = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
-                                "flipBuffers","()V");
     midAudioInit = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
                                 "audioInit", "(IZZI)I");
     midAudioWriteShortBuffer = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass,
@@ -134,7 +131,7 @@ JNIEXPORT void JNICALL SDL_Android_Init(JNIEnv* mEnv, jclass cls)
 
     bHasNewData = SDL_FALSE;
 
-    if(!midGetNativeSurface || !midFlipBuffers || !midAudioInit ||
+    if (!midGetNativeSurface || !midAudioInit ||
        !midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioQuit || !midPollInputDevices) {
         __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly");
     }
@@ -267,11 +264,6 @@ JNIEXPORT void JNICALL Java_org_libsdl_app_SDLActivity_onNativeSurfaceDestroyed(
 
 }
 
-JNIEXPORT void JNICALL Java_org_libsdl_app_SDLActivity_nativeFlipBuffers(JNIEnv* env, jclass jcls)
-{
-    SDL_GL_SwapWindow(Android_Window);
-}
-
 /* Keydown */
 JNIEXPORT void JNICALL Java_org_libsdl_app_SDLActivity_onNativeKeyDown(
                                     JNIEnv* env, jclass jcls, jint keycode)
@@ -478,12 +470,6 @@ ANativeWindow* Android_JNI_GetNativeWindow(void)
     return anw;
 }
 
-void Android_JNI_SwapWindow(void)
-{
-    JNIEnv *mEnv = Android_JNI_GetEnv();
-    (*mEnv)->CallStaticVoidMethod(mEnv, mActivityClass, midFlipBuffers);
-}
-
 void Android_JNI_SetActivityTitle(const char *title)
 {
     jmethodID mid;
diff --git a/src/core/android/SDL_android.h b/src/core/android/SDL_android.h
index 378fa0582..758e3023c 100644
--- a/src/core/android/SDL_android.h
+++ b/src/core/android/SDL_android.h
@@ -33,9 +33,6 @@ extern "C" {
 #include "SDL_rect.h"
 
 /* Interface from the SDL library into the Android Java activity */
-/* extern SDL_bool Android_JNI_CreateContext(int majorVersion, int minorVersion, int red, int green, int blue, int alpha, int buffer, int depth, int stencil, int buffers, int samples);
-extern SDL_bool Android_JNI_DeleteContext(void); */
-extern void Android_JNI_SwapWindow(void);
 extern void Android_JNI_SetActivityTitle(const char *title);
 extern SDL_bool Android_JNI_GetAccelerometerValues(float values[3]);
 extern void Android_JNI_ShowTextInput(SDL_Rect *inputRect);
@@ -64,7 +61,7 @@ SDL_bool Android_JNI_HasClipboardText(void);
 
 /* Power support */
 int Android_JNI_GetPowerInfo(int* plugged, int* charged, int* battery, int* seconds, int* percent);
-    
+
 /* Joystick support */
 void Android_JNI_PollInputDevices(void);