Creates a new `GBytes` args from the current state of the given this.
Any uniforms of the shader that have not been explicitly set on the this are zero-initialized.
The given `GskShaderArgsBuilder` is reset once this function returns; you cannot call this function multiple times on the same this instance.
This function is intended primarily for bindings. C code should use [[email protected]_to_args].
| this |
a `GskShaderArgsBuilder` |
|
the newly allocated buffer with all the args added to this |