def _query_uniform_block(self, location: int) -> Tuple[int, int, str]:
"""Query active uniform block by retrieving the name and index and size"""
# Query name
u_size = gl.GLint()
buf_size = 192 # max uniform character length
u_name = create_string_buffer(buf_size)
gl.glGetActiveUniformBlockName(
self._glo, # program to query
location, # location to query
256, # max size if the name
u_size, # length
u_name,
)
# Query index
index = gl.glGetUniformBlockIndex(self._glo, u_name)
# Query size
b_size = gl.GLint()
gl.glGetActiveUniformBlockiv(self._glo, index,
gl.GL_UNIFORM_BLOCK_DATA_SIZE, b_size)
return index, b_size.value, u_name.value.decode()
def binding(self) -> int:
"""int: Get or set the binding point for this uniform block"""
binding = gl.GLint()
gl.glGetActiveUniformBlockiv(self.glo, self.index, gl.GL_UNIFORM_BLOCK_BINDING, binding)
return binding.value