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Author: Spasi (posted 2012-11-05 19:53:43, viewed 353 times)

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import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;

import java.nio.IntBuffer;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL20.*;

public class JNIPerfTestLWJGL {

   private JNIPerfTestLWJGL() {
   }

   public static void main(String[] args) {
      try {
         Display.setFullscreen(false);
         Display.create();
      } catch (LWJGLException e) {
         e.printStackTrace();
      }

      final int DURATION = 1024 * 1024;
      final int WARMUP = 5 * DURATION;
      final int BENCH = 10 * DURATION;

      benchmark(WARMUP, BENCH);
   }

   private static void benchmark(final int WARMUP, final int BENCH) {
      final IntBuffer buffer = BufferUtils.createIntBuffer(16);

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

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

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

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

}





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