TextureLibrary.java

import java.io.File;
import java.io.FileInputStream;
import com.jogamp.opengl.*;
import com.jogamp.opengl.util.texture.spi.JPEGImage;

public final class TextureLibrary {
    
  // only deals with rgb jpg files
  
  public static int[] loadTexture(GL3 gl, String filename) {
    return loadTexture(gl, filename, GL.GL_REPEAT, GL.GL_REPEAT,
                                     GL.GL_LINEAR, GL.GL_LINEAR);
  }
  
  
  public static int[] loadTexture(GL3 gl, String filename, 
                                  int wrappingS, int wrappingT, int filterS, int filterT) {
    int[] textureId = new int[1];
    try {
      File f = new File(filename);      
      JPEGImage img = JPEGImage.read(new FileInputStream(f));
      gl.glGenTextures(1, textureId, 0);
      gl.glBindTexture(GL.GL_TEXTURE_2D, textureId[0]);
      gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, wrappingS);
      gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, wrappingT);      
      gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, filterS);
      gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, filterT);
      gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGB, img.getWidth(), img.getHeight(), 0, GL.GL_RGB, GL.GL_UNSIGNED_BYTE, img.getData());
      gl.glGenerateMipmap(GL.GL_TEXTURE_2D);
      gl.glTexParameteri(GL.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_LINEAR_MIPMAP_LINEAR);
      gl.glBindTexture(GL.GL_TEXTURE_2D, 0); 
    }
    catch(Exception e) {
      System.out.println("Error loading texture " + filename); 
    }
    return textureId;
  }
  
}