/*
 * Copyright (C) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package opengl.scenes;

import opengl.jni.Natives;
import android.content.Context;
import android.graphics.PixelFormat;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;



/**
 * An implementation of SurfaceView that uses the dedicated surface for
 * displaying an OpenGL animation.  This allows the animation to run in a
 * separate thread, without requiring that it be driven by the update mechanism
 * of the view hierarchy.
 *
 * The application-specific rendering code is delegated to a GLView.Renderer
 * instance.
 */
public class GLSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
    public GLSurfaceView(Context context) {
        super(context);
        init();
    }

    public GLSurfaceView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed
        mHolder = getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_GPU);
    }

    public SurfaceHolder getSurfaceHolder() {
        return mHolder;
    }


    public void setRenderer(Renderer renderer) {
        mGLThread = new GLThread(renderer, mHolder);
        mGLThread.start();
        
        System.out.println("GLSurfaceView::setRenderer setting natives listener");
        Natives.setListener(mGLThread);
    }

    public void surfaceCreated(SurfaceHolder holder) {
        mGLThread.surfaceCreated();
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // Surface will be destroyed when we return
        mGLThread.surfaceDestroyed();
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // Surface size or format has changed. This should not happen in this
        // example.
        mGLThread.onWindowResize(w, h); 
    }

    /**
     * Inform the view that the activity is paused.
     */
    public void onPause() {
        mGLThread.onPause();
    }

    /**
     * Inform the view that the activity is resumed.
     */
    public void onResume() {
        mGLThread.onResume();
    }

    /**
     * Inform the view that the window focus has changed.
     */
    @Override public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        mGLThread.onWindowFocusChanged(hasFocus);
    }

    /**
     * Queue an "event" to be run on the GL rendering thread.
     * @param r the runnable to be run on the GL rendering thread.
     */
    public void queueEvent(Runnable r) {
        mGLThread.queueEvent(r);
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        mGLThread.requestExitAndWait();
    }


    private SurfaceHolder mHolder;
    private GLThread mGLThread;

}