thanks buddy, but I am wondering how many ways that opengl use to display a image?
I only want opengl diaplay a image with any size, for example 200X100 or 600X800. the images should not be changed in size,
is this the only way that I map the image as a texture onto a QUAD? this way is not good since the images size is restricted to 2powern, which will always change the size.
any other ways? thanks.