Maximal texture size in OpenGL?

[stampede]

1) Yes, it depends on the underlying graphics hardware:

GLint texSize;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &texSize);

GLint texSize;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &texSize);

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2) I don't think so, it is hardware-dependent.
3) No idea, sorry.

[UweS]

Thank you stampede,

is the size I'll get for one texture image or for all textures if I use more than one?

[stampede]

I think this is the size limit for a single texture.