ComputeParticles.java

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/* Copyright (c) 2014-2017, ARM Limited and Contributors
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge,
 * to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.arm.malideveloper.openglessdk.computeparticles;

import java.io.File;
import java.io.InputStream;
import java.io.RandomAccessFile;
import android.os.Bundle;
import android.app.Activity;
import android.content.res.AssetManager;
import android.util.Log;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.content.Context;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.view.MotionEvent;
import android.view.Display;
import com.arm.malideveloper.openglessdk.*;

class ComputeView extends MaliSamplesView
{
    public ComputeView(Context context)
    {
        super(context, GlesVersion.GLES3);
    }

    @Override protected void setRendererCallback()
    {
        setRenderer(new Renderer());
    }

    @Override protected void destroyContextCallback()
    {
        ComputeParticles.uninit();
    }

    public boolean onTouchEvent(MotionEvent event)
    {
        // Resize to fit framebuffer size
        // float x = 1280.0f * (event.getRawX() / 2560.0f);
        // float y = 800.0f * (event.getRawY() / 1600.0f);
        // Since we render into half-resolution buffer
        float x = event.getRawX() / 2.0f;
        float y = event.getRawY() / 2.0f;

        if (event.getAction() == MotionEvent.ACTION_UP)
            ComputeParticles.onpointerup(x, y);
        else if (event.getAction() == MotionEvent.ACTION_MOVE)
            ComputeParticles.onpointerdown(x, y);
        return true;
    }

    protected class Renderer implements GLSurfaceView.Renderer
    {
        public void onDrawFrame(GL10 gl)
        {
            ComputeParticles.step();
        }

        public void onSurfaceChanged(GL10 gl, int width, int height)
        {
            ComputeParticles.init(width, height);
        }

        public void onSurfaceCreated(GL10 gl, EGLConfig config)
        {
        }
    }
};

public class ComputeParticles extends MaliSamplesActivity
{
    ComputeView mView;
    private static android.content.Context applicationContext = null;
    private static String assetsDirectory = null;
    private static String LOGTAG = "ComputeParticles";

    public static native void init(int width, int height);
    public static native void step();
    public static native void uninit();
    public static native void onpointerup(float x, float y);
    public static native void onpointerdown(float x, float y);

    @Override protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        applicationContext = getApplicationContext();
        assetsDirectory = applicationContext.getFilesDir().getPath() + "/";

        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
           WindowManager.LayoutParams.FLAG_FULLSCREEN);

        extractAsset("sphere.vs");
        extractAsset("sphere.fs");

        extractAsset("plane.vs");
        extractAsset("plane.fs");

        extractAsset("shadowmap.vs");
        extractAsset("shadowmap.fs");

        extractAsset("particle.vs");
        extractAsset("particle.fs");

        extractAsset("spawn.cs");
        extractAsset("update.cs");

        extractAsset("scan.cs");
        extractAsset("scan_first.cs");
        extractAsset("scan_resolve.cs");
        extractAsset("scan_reorder.cs");

        mView = new ComputeView(getApplication());

        // Change resolution to half
        Display display = getWindowManager().getDefaultDisplay();
        int width = display.getWidth();
        int height = display.getHeight();
        mView.getHolder().setFixedSize(width / 2, height / 2);
        setContentView(mView);
    }

    @Override protected void onPause()
    {
        super.onPause();
        mView.onPause();
    }

    @Override protected void onResume()
    {
        super.onResume();
        mView.onResume();
    }

    @Override protected void onDestroy()
    {
        super.onDestroy();
    }

    private void extractAsset(String assetName)
    {
        File file = new File(assetsDirectory + assetName);

        if(file.exists()) {
            Log.d(LOGTAG, assetName +  " already exists. No extraction needed.\n");
        } else {
            Log.d(LOGTAG, assetName + " doesn't exist. Extraction needed. \n");

            try {
                RandomAccessFile randomAccessFile = new RandomAccessFile(assetsDirectory + assetName,"rw");
                AssetManager     assetManager     = applicationContext.getResources().getAssets();
                InputStream      inputStream      = assetManager.open(assetName);

                byte buffer[] = new byte[1024];
                int count     = inputStream.read(buffer, 0, 1024);

                while (count > 0) {
                    randomAccessFile.write(buffer, 0, count);

                    count = inputStream.read(buffer, 0, 1024);
                }

                randomAccessFile.close();
                inputStream.close();
            } catch(Exception e) {
                Log.e(LOGTAG, "Failure in extractAssets(): " + e.toString() + " " + assetsDirectory + assetName);
            }

            if(file.exists()) {
                Log.d(LOGTAG,"File extracted successfully");
            }
        }
    }

    static
    {
        // Load the NDK library for this example, built with ndk-build
        System.loadLibrary("Native");
    }
}