(z, mode="max")
| 18 | |
| 19 | |
| 20 | def _vectorize_zvalue(z, mode="max"): |
| 21 | alpha = 255 if mode == "max" else 0 |
| 22 | if z is None: |
| 23 | return z |
| 24 | elif np.isscalar(z): |
| 25 | return [z] * 3 + [alpha] |
| 26 | elif len(z) == 1: |
| 27 | return list(z) * 3 + [alpha] |
| 28 | elif len(z) == 3: |
| 29 | return list(z) + [alpha] |
| 30 | elif len(z) == 4: |
| 31 | return z |
| 32 | else: |
| 33 | raise ValueError( |
| 34 | "zmax can be a scalar, or an iterable of length 1, 3 or 4. " |
| 35 | "A value of %s was passed for zmax." % str(z) |
| 36 | ) |
| 37 | |
| 38 | |
| 39 | def _infer_zmax_from_type(img): |