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79 lines
1.8 KiB
Python
79 lines
1.8 KiB
Python
from . import Image
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modules = {
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"pil": "PIL._imaging",
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"tkinter": "PIL._tkinter_finder",
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"freetype2": "PIL._imagingft",
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"littlecms2": "PIL._imagingcms",
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"raqm": "PIL._imagingft",
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"webp": "PIL._webp",
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}
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def check_module(feature):
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if not (feature in modules):
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raise ValueError("Unknown module %s" % feature)
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module = modules[feature]
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try:
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imported_module = __import__(module)
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return True
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except ImportError:
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return False
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def get_supported_modules():
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return [f for f in modules if check_module(f)]
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codecs = {
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"jpg": "jpeg",
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"jpg_2000": "jpeg2k",
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"zlib": "zip",
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"libtiff": "libtiff"
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}
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def check_codec(feature):
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if feature not in codecs:
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raise ValueError("Unknown codec %s" % feature)
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codec = codecs[feature]
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return codec + "_encoder" in dir(Image.core)
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def get_supported_codecs():
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return [f for f in codecs if check_codec(f)]
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features = {
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"webp_mux": ("PIL._webp", 'HAVE_WEBPMUX'),
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"transp_webp": ("PIL._webp", "HAVE_TRANSPARENCY"),
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}
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def check_feature(feature):
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if feature not in features:
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raise ValueError("Unknown feature %s" % feature)
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module, flag = features[feature]
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try:
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imported_module = __import__(module, fromlist=['PIL'])
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return getattr(imported_module, flag)
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except ImportError:
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return None
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def get_supported_features():
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return [f for f in features if check_feature(f)]
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def check(feature):
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return (feature in modules and check_module(feature) or \
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feature in codecs and check_codec(feature) or \
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feature in features and check_feature(feature))
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def get_supported():
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ret = get_supported_modules()
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ret.extend(get_supported_features())
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ret.extend(get_supported_codecs())
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return ret
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