OpenGL from JNI on MacOSX

A

Andy Skinner

We have a JNI wrapper around OpenGL that we use for Java (until we
replace with the Sun/SGI JOGL). This works on Windows and Sun, and I
am trying to port it to the Mac.

In the JNI code (which is in C), I have to load the AWT library, get
the drawing info out of that, and get the version native to the mac.

This is a JAWT_MacOSXDrawingSurfaceInfo, and inside it are:
cgWindowID
cgConnectionID
cgContextRef
cocoaWindowRef
carbonWindowRef
windowX, windowY
windowWidth, windowHeight

On Windows, we get a field called hwnd from the Windows-specific
structure. On Sun, we get a drawable. This gets passed around a bit
using JNI, and eventually goes into a call to glXMakeCurrent() (or
wglMakeCurrent(), depending on platform). That call is failing, with
GLXBadDrawable as the error. I've tried using the cgWindowID,
cocoaWindowRef, and carbonWindowRef.

Do I need to do something else to get an OpenGL-drawable window? What
do I use to get an X Window that I can pass to glXMakeCurrent()?

I'm not a OSX expert at all, so I may need some follow-up questions.
:)


thanks,

andy
AVS
 

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