I am trying to get a BufferedImage and extract the pixel data to feed into glDrawPixels(), but it keeps giving me an exception. Here is the StackTrace:
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Number of remaining buffer elements is 502865, must be at least 1508598
at org.lwjgl.BufferChecks.checkBufferSize(BufferChecks.java:177)
at org.lwjgl.BufferChecks.checkBuffer(BufferChecks.java:187)
at org.lwjgl.opengl.GL11.glDrawPixels(GL11.java:2026)
at Canvas.paintGL(Canvas.java:123)
at org.lwjgl.opengl.AWTGLCanvas.paint(AWTGLCanvas.java:256)
at sun.awt.RepaintArea.paintComponent(Unknown Source)
at sun.awt.RepaintArea.paint(Unknown Source)
at sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
and the relevant code:
GraphicsConfiguration gc = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
Image img = viewport.CreateImage(null);
BufferedImage bufImg = gc.createCompatibleImage(img.getWidth(null), img.getHeight(null), Transparency.OPAQUE);
System.out.println(bufImg);
DataBuffer dataBuffer = bufImg.getData().getDataBuffer();
IntBuffer image = IntBuffer.allocate(dataBuffer.getSize());
image.put(dataBuffer.getOffsets());
System.out.println("db.size: " + dataBuffer.getSize() + "\nib.rem: " + image.remaining());
GL11.glDrawPixels(img.getWidth(null), img.getHeight(null), GL11.GL_RGB, GL11.GL_INT, image);
Can anyone help me figure this out? I really have no idea how this works!
