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Author: Spasi (posted 2012-11-05 19:59:28, viewed 462 times)

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import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;
import javax.media.opengl.*;

import com.jogamp.newt.Display;
import com.jogamp.newt.NewtFactory;
import com.jogamp.newt.Screen;
import com.jogamp.newt.Window;
import com.jogamp.newt.opengl.GLWindow;

public class JNIPerfTestJOGL {

   public static void test(GL2 gl) {
      final int DURATION = 1024 * 1024;
      final int WARMUP = 5 * DURATION;
      final int BENCH = 10 * DURATION;

      benchmark(gl, WARMUP, BENCH);
   }

   private static void benchmark(GL2 gl, final int WARMUP, final int BENCH) {
      final IntBuffer buffer = ByteBuffer.allocateDirect(16 * 4).order(ByteOrder.nativeOrder()).asIntBuffer();

      int sum = 0;
      sum += benchLoop(gl, buffer, WARMUP);

      long time = System.nanoTime();
      sum += benchLoop(gl, buffer, BENCH);
      time = (System.nanoTime() - time) / BENCH;

      System.out.println(time);
      if ( sum == Integer.MIN_VALUE )
         throw new RuntimeException();
   }

   private static int benchLoop(GL2 gl, final IntBuffer buffer, final int duration) {
      int sum = 0;
      for ( int i = 0; i < duration; i++ ) {
         gl.glGetIntegerv(GL2.GL_MAX_TEXTURE_IMAGE_UNITS, buffer);
         sum += buffer.get(0);
         //gl.glDepthMask(true);
         //gl.glColor4f(1.0f, 1.0f, 1.0f, 0.0f);
      }
      return sum;
   }

   public static void main(String[] args) {
      GLEventListener demo = new GLEventListener() {
         public void init(final GLAutoDrawable glAutoDrawable) {
         }

         public void dispose(final GLAutoDrawable glAutoDrawable) {
         }

         public void display(final GLAutoDrawable glAutoDrawable) {
            GL2 gl = glAutoDrawable.getGL().getGL2();
            test(gl);
         }

         public void reshape(final GLAutoDrawable glAutoDrawable, final int i, final int i2, final int i3, final int i4) {
         }
      };

      GLProfile glp = GLProfile.get(null);
      try {
         GLCapabilities caps = new GLCapabilities(glp);

         Window nWindow;
         Display nDisplay = NewtFactory.createDisplay(null); // local display
         Screen nScreen = NewtFactory.createScreen(nDisplay, 0); // screen 0
         nWindow = NewtFactory.createWindow(nScreen, caps);

         GLWindow window = GLWindow.create(nWindow);
         window.addGLEventListener(demo);

         window.setVisible(true);
         window.destroy();
      } catch (Throwable t) {
         t.printStackTrace();
      }
   }

}





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