![]() And so far there's no OpenGL-4 software rasterizer. If your GPU can't to OpenGL-3 or OpenGL-4 then all you could do is fall back to a software implementation. However the limiting part is the capabilities of your GPU. So updating the driver may give you a major version bump. It doesnt but I dont find it a problem in practice, since glCopyTexSubImage2D provides the same function. However, I never seen a video card with 3.x support: old Intel cards support 2.x, and Nvidia/AMD (and recent Intel) support at least 4.2. Of course the OpenGL driver itself is part of the implementation. From my point of view, 3.2 or 3.3 is a good level so work with. ![]() Or in other words: A OpenGL implementation implemented along the OpenGL-3 specification will not be capable of OpenGL-4 (OTOH minor version bumps are within the capabilities of a given major implementation feature set the mostly clean up the API or give access to things which were already possible (and maybe accessible through extensions) but not formally specified in core). a major capability bump on the implementation side. ![]() Since version 3 the major version number of OpenGL is equivalent to feature capabilities, i.e. it doesn't matter in which way it's implemented) the authors of the OpenGL specification clearly target special purpose hardware (aka GPUs). While the OpenGL specifications are written implementation neutral (i.e. ![]()
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