Function gl::GetTextureSubImage

pub unsafe fn GetTextureSubImage(
    texture: GLuint, 
    level: GLint, 
    xoffset: GLint, 
    yoffset: GLint, 
    zoffset: GLint, 
    width: GLsizei, 
    height: GLsizei, 
    depth: GLsizei, 
    format: GLenum, 
    type_: GLenum, 
    bufSize: GLsizei, 
    pixels: *mut c_void
)