Unfortunately, this information might not be available to Blitz either, if there's no OpenGL call for it.
Note the OpenGL driver automatically takes care of tranferring textures to video RAM as needed and caching textures in video RAM. You don't have any control over how this works.
Note the OpenGL driver automatically takes care of tranferring textures to video RAM as needed and caching textures in video RAM. You don't have any control over how this works.