src/third_party/skia/platform_tools/android/apps/arcore/src/main/java/org/skia/arcore/JniInterface.java

package org.skia.arcore;

import android.app.Activity;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.opengl.GLUtils;
import android.util.Log;

import java.io.IOException;

/**
 * JNI interface to native layer.
 */
public class JniInterface {
    static {
        System.loadLibrary("hello_ar_native");
    }

    private static final String TAG = "JniInterface";
    static AssetManager assetManager;

    public static native long createNativeApplication(AssetManager assetManager);

    public static native void destroyNativeApplication(long nativeApplication);

    public static native void onPause(long nativeApplication);

    public static native void onResume(long nativeApplication, Context context, Activity activity);

    /**
     * Allocate OpenGL resources for rendering.
     */
    public static native void onGlSurfaceCreated(long nativeApplication);

    /**
     * Called on the OpenGL thread before onGlSurfaceDrawFrame when the view port width, height, or
     * display rotation may have changed.
     */
    public static native void onDisplayGeometryChanged(
            long nativeApplication, int displayRotation, int width, int height);

    public static native void onObjectRotationChanged(long nativeApplication, int rotation);

    public static native void onAction(long nativeApplication, float value);

    /**
     * Main render loop, called on the OpenGL thread.
     */
    public static native void onGlSurfaceDrawFrame(long nativeApplication);

    /**
     * OnTouch event, called on the OpenGL thread.
     */

    public static native void onTouchTranslate(long nativeApplication, float x, float y);

    public static native boolean onTouchedFirst(long nativeApplication, float x, float y, int drawMode);

    public static native void onTouchedFinal(long nativeApplication, int type);


    /**
     * Get plane count in current session. Used to disable the "searching for surfaces" snackbar.
     */
    public static native boolean hasDetectedPlanes(long nativeApplication);

    public static Bitmap loadImage(String imageName) {

        try {
            return BitmapFactory.decodeStream(assetManager.open(imageName));
        } catch (IOException e) {
            Log.e(TAG, "Cannot open image " + imageName);
            return null;
        }
    }

    public static void loadTexture(int target, Bitmap bitmap) {
        GLUtils.texImage2D(target, 0, bitmap, 0);
    }
}