I heard you can hook window handle and use this window as OpenGL canvas. I know how to hook windows, but I can’t find how can I draw on this window.
PS. I’m using Qt if it helps.
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I heard you can hook window handle and use this window as OpenGL canvas. I know how to hook windows, but I can’t find how can I draw on this window.
PS. I’m using Qt if it helps.
OpenGL contexts are only usable in one thread at a time and are bound to processes. So what that required was creating a OpenGL context of a foreign process’ resource.
On Windows using some very quircky hacks this was possible in at least WinXP (I don’t know about Vista or 7); this usually includes making large portions of the process memory shared.
On X11/GLX it’s a lot easier by creating the context as indirect rendering context (unfortunately OpenGL-3 has not complete indirect GLX specification, for some shady excuses of reasons); indirect contexts can be accessed from multiple processes.
In any case both processes must cooperate to make this work.