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I am trying to Google for what I’ve mentioned in the title, but somehow I couldn’t find it. This should not be that hard, should it?
What I am looking for is a way to gain access to an OpenGL ES texture on iPhone, and a way to get/set pixel with it. What are the OpenGL ES functions I am looking for?
I don’t know about setting an individual pixel, but glReadPixels can read a block of pixels from the frame buffer (http://www.khronos.org/opengles/sdk/docs/man/glReadPixels.xml). Your problem googling may be because texture pixels are often shortened to ‘texels’.