inter process NSView sharing

• Subject: inter process NSView sharing
• From: "Jonathan Cochrane" <email@hidden>
• Date: Fri, 23 May 2008 15:16:37 +0100
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Hi

I have 2 applications, one is written in java, the other in C. For reasons I wont go into to I need to have the C application perform hardware accelerated opengl rendering to a window created by the Java application.

This is currently working on Windows. On this platform the java application sends the hwnd of the java canvas to the C application via a bridge. The C application then creates an opengl rendering context using this hwnd and all is fine.

Now, on OSX the java app gets a NSView/cocoaviewref. Is there some member of NSView similar to the HWND on windows that I can pass to my C process? The C process can then create a hardware accelerated opengl rendering context from this 'handle' and render to the java apps NSView.

I've looked at using Distributed Objects, however the C application would need quite a bit of rework to make it fit into the Cocoa application framework, so this is not an option. So, can a non cocoa application communicate with a distributed object ?

If distributed objects are not the way to go, I presume there must be another way to do it as I've seen reference to NSWindowSharingReadWrite in the apple dev docs. If I use the setSharingType approach, what does my C application need to be able to create a rendering context on the java applications shared window. Perhaps there is some way to access this window using the OSX window server API ?

many thanks

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