Ejemplo n.º 1
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def test_FlateDecode(predictor, s):
    """
    Tests FlateDecode decode() and encode() methods.
    """
    codec = FlateDecode()
    s = s.encode()
    encoded = codec.encode(s)
    assert codec.decode(encoded, {"/Predictor": predictor}) == s
Ejemplo n.º 2
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def test_FlateDecode_unsupported_predictor():
    """
    Inputs an unsupported predictor (outside the [10, 15] range) checking
    that PdfReadError() is raised. Once this predictor support is updated
    in the future, this test case may be removed.
    """
    codec = FlateDecode()
    predictors = (-10, -1, 0, 9, 16, 20, 100)

    for predictor, s in cartesian_product(predictors, filter_inputs):
        s = s.encode()
        with pytest.raises(PdfReadError):
            codec.decode(codec.encode(s), {"/Predictor": predictor})
Ejemplo n.º 3
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 def __init__(self, im):
   super().__init__()
   try:
     depth, colorspace = MODE_TO_COLORSPACE[im.mode]
   except KeyError:
     raise NotImplementedError('image mode %r not supported' % im.mode)
   w, h = im.size
   # always compress raw image data
   self._data = FlateDecode.encode(im.tobytes())
   self[NameObject("/Filter")] = NameObject('/FlateDecode')
   self[NameObject('/Type')] = NameObject('/XObject')
   self[NameObject('/Subtype')] = NameObject('/Image')
   self[NameObject('/Width')] = NumberObject(w)
   self[NameObject('/Height')] = NumberObject(h)
   self[NameObject('/BitsPerComponent')] = NumberObject(depth)
   self[NameObject('/ColorSpace')] = NameObject(colorspace)
Ejemplo n.º 4
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 def __init__(self, im):
     super().__init__()
     try:
         depth, colorspace = MODE_TO_COLORSPACE[im.mode]
     except KeyError:
         raise NotImplementedError('image mode %r not supported' % im.mode)
     w, h = im.size
     # always compress raw image data
     self._data = FlateDecode.encode(im.tobytes())
     self[NameObject("/Filter")] = NameObject('/FlateDecode')
     self[NameObject('/Type')] = NameObject('/XObject')
     self[NameObject('/Subtype')] = NameObject('/Image')
     self[NameObject('/Width')] = NumberObject(w)
     self[NameObject('/Height')] = NumberObject(h)
     self[NameObject('/BitsPerComponent')] = NumberObject(depth)
     self[NameObject('/ColorSpace')] = NameObject(colorspace)
Ejemplo n.º 5
0
def test_FlateDecode_decompress_array_params(params):
    codec = FlateDecode()
    s = ""
    s = s.encode()
    encoded = codec.encode(s)
    assert codec.decode(encoded, params) == s