65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
#
|
|
# The Python Imaging Library.
|
|
# $Id$
|
|
#
|
|
# standard mode descriptors
|
|
#
|
|
# History:
|
|
# 2006-03-20 fl Added
|
|
#
|
|
# Copyright (c) 2006 by Secret Labs AB.
|
|
# Copyright (c) 2006 by Fredrik Lundh.
|
|
#
|
|
# See the README file for information on usage and redistribution.
|
|
#
|
|
|
|
# mode descriptor cache
|
|
_modes = None
|
|
|
|
|
|
class ModeDescriptor:
|
|
"""Wrapper for mode strings."""
|
|
|
|
def __init__(self, mode, bands, basemode, basetype):
|
|
self.mode = mode
|
|
self.bands = bands
|
|
self.basemode = basemode
|
|
self.basetype = basetype
|
|
|
|
def __str__(self):
|
|
return self.mode
|
|
|
|
|
|
def getmode(mode):
|
|
"""Gets a mode descriptor for the given mode."""
|
|
global _modes
|
|
if not _modes:
|
|
# initialize mode cache
|
|
|
|
from . import Image
|
|
|
|
modes = {}
|
|
# core modes
|
|
for m, (basemode, basetype, bands) in Image._MODEINFO.items():
|
|
modes[m] = ModeDescriptor(m, bands, basemode, basetype)
|
|
# extra experimental modes
|
|
modes["RGBa"] = ModeDescriptor("RGBa", ("R", "G", "B", "a"), "RGB", "L")
|
|
modes["LA"] = ModeDescriptor("LA", ("L", "A"), "L", "L")
|
|
modes["La"] = ModeDescriptor("La", ("L", "a"), "L", "L")
|
|
modes["PA"] = ModeDescriptor("PA", ("P", "A"), "RGB", "L")
|
|
# mapping modes
|
|
for i16mode in (
|
|
"I;16",
|
|
"I;16S",
|
|
"I;16L",
|
|
"I;16LS",
|
|
"I;16B",
|
|
"I;16BS",
|
|
"I;16N",
|
|
"I;16NS",
|
|
):
|
|
modes[i16mode] = ModeDescriptor(i16mode, ("I",), "L", "L")
|
|
# set global mode cache atomically
|
|
_modes = modes
|
|
return _modes[mode]
|