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OpenGL Tiled Textures with pixel store?

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I'm working on some texture classes that can handle creating tiled textures from images. The OpenGL Red book says that the pixel store functions effect texture calls. If I have a large image in a single data array, and I want to create several tiled textures from it, can I define a rectangular region with the pixel store functions to do this? If so, does the entire data array get passed to the card when creating the texture, or just the region from the array that was defined? Would this be significantly slower than making the tiled textures from several different data arrays? Thanks for any information on this! Kelly ps - I've been trying to test this out on my own, but so far I've been unable to get it to work. However, I'm pretty new at the pixel store functions, so I might just be setting things up incorrectly. I am just curious if what I am trying is even possible.

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