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)