Re: [gl4java-usergroup] GLJPanel bug?

[Kenneth B. R. <kbr...@al...>]

> Also, I wish to speed up the GLJPanel with new API in JDK1.4
> (e.g. the VolatileImage class and the java.nio package).
> GL4Java developers have any plan at this point?

I think the way to get more speed out of GLJPanel is to avoid the
pixel copy that is occurring now, by keeping track of where the
GLJPanel is within the component hierarchy, clipping the OpenGL
rendering region appropriately, and drawing directly to the
heavyweight component to take advantage of hardware acceleration.
This won't work if the component is partially occluded, but that
rarely happens and the system could revert back to the current
pixel copy in that case.

I'm pretty sure this technique was used in the now-defunct
Magician Java binding for OpenGL and is discussed in the author's
book:

http://www.symbolstone.org/technology/java/nmbook/