Hardware cursor (another buffer problem)

OpenGL Development
#1

I’m writing a method that I will be able to easily re-use for making a hardware cursor (with the option of it being animated) and I’ve run into a problem with the image data I’m giving it. There are two methods involved with this problem, the first is the method for creating the cursor with a single image, the second is a method for converting an image to bytes.


public static Cursor createHWCursor(BufferedImage image, int xHotSpot, int yHotSpot)
  {                   
    IntBuffer imageBytes = ImageUtils.convertImageToBytes(image).asIntBuffer();
    
    IntBuffer bufferedDelays = ByteBuffer.allocateDirect(4).order(ByteOrder.nativeOrder()).asIntBuffer();
    bufferedDelays.put(0);
    bufferedDelays.flip();
    
    try 
    {
      return new Cursor(image.getWidth(), image.getHeight(), xHotSpot, yHotSpot, 1, imageBytes, bufferedDelays);
    } catch (LWJGLException ex) 
    {
      ex.printStackTrace();
      return null;
    } 
  }



public static ByteBuffer convertImageToBytes(BufferedImage bufferedImage) 
    { 
        ByteBuffer imageBuffer = null; 
        
        byte[] data = ((DataBufferByte) bufferedImage.getRaster().getDataBuffer()).getData(); 

        imageBuffer = ByteBuffer.allocateDirect(data.length); 
        imageBuffer.order(ByteOrder.nativeOrder()); 
        imageBuffer.put(data, 0, data.length); 
        imageBuffer.flip();
        
        return imageBuffer; 
    }

I am getting this error:
java.lang.IllegalArgumentException: Number of remaining buffer elements is 825, must be at least 3300

at this line:
return new Cursor(image.getWidth(), image.getHeight(), xHotSpot, yHotSpot, 1, imageBytes, bufferedDelays);

any ideas? I’m lost…

#2

Problem solved once again, this time not by my own doing though. Thanks to Matzon in the irc channel! The pixel format wasn’t correct so the byte[] holding the image data was too small. Also the image needed to be square for it to work.