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    <p>As others mentioned, your OS (in collaboration with the driver resource manager) should release the resources. That's what OSes are for. It's worth noting that this has nothing to do with OpenGL, but is something that is part of the charter of well behaved OSes and their associated drivers. The OS is there to handle <em>all</em> the system resources. OpenGL ones are just but a subset of them, and they are no different from, say a file handle. Now to get more concrete, you should specify which OS you care about.</p> <p>BTW, This is where I take exception with ChrisF's answer. It should not be up to the driver to decide it needs to do cleanup. OS driver models will have a clear interface between the user-mode OpenGL driver (that shouldn't do actual gfx resource allocation, since it's shared in the machine), the OS (that provides the equivalent of system calls to allocate resources) and the kernel-mode driver (that is merely there to execute the OS orders in a way that is compatible with the gpu). This is at least the case with the WIN2K and WDDM models. </p> <p>So... if your process crashes or otherwise terminates, in those models, it's the OS responsibility to call the kernel-mode driver to free all the resources that were associated with the process.</p> <p>Now, whether you <em>should</em> or not is really something that is a little like asking tabs-or-spaces in source code. Different people have different beliefs here. "the OS will do it anyways, quitting immediately is a better end-user experience" vs "I want to know whether I'm leaking memory because if my program is long-running, I really don't want it to hit OOM errors. Best way to do that is to be leak-free throughout" are the 2 main lines of thought I'm aware of.</p>
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    1. POOpenGL GPU Memory cleanup, required?
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    1. COI think I got the "why".. thx for your answer
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