BUG: JPX image without ColorSpace (#2062)

Closes #2061

pypdf/filters.py

@@ -721,6 +721,8 @@ def _get_imagemode(
  Image mode not taking into account mask(transparency)
  ColorInversion is required (like for some DeviceCMYK)
  """
+ if isinstance(color_space, NullObject):
+ return "", False
  if isinstance(color_space, str):
  pass
  elif not isinstance(color_space, list):
@@ -931,6 +933,9 @@ def _handle_jpx(
  extension = ".jp2" # mime_type = "image/x-jp2"
  img1 = Image.open(BytesIO(data), formats=("JPEG2000",))
  mode, invert_color = _get_imagemode(color_space, colors, mode)
+ if mode == "":
+ mode = cast(mode_str_type, img1.mode)
+ invert_color = mode in ("CMYK",)
  if img1.mode == "RGBA" and mode == "RGB":
  mode = "RGBA"
  # we need to convert to the good mode
@@ -1028,6 +1033,8 @@ def _handle_jpx(
  False,
  )
  else:
+ if mode == "":
+ raise PdfReadError(f"ColorSpace field not found in {x_object_obj}")
  img, image_format, extension, invert_color = (
  Image.frombytes(mode, size, data),
  "PNG",

tests/test_filters.py

@@ -626,3 +626,18 @@ def test_singleton_device():
  name = "pypdf_with_arr_deviceRGB.pdf"
  reader = PdfReader(BytesIO(get_pdf_from_url(url, name=name)))
  reader.pages[0].images[0]
+
+
+@pytest.mark.enable_socket()
+def test_jpx_no_spacecode():
+ """From #2061"""
+ url = "https://github.com/py-pdf/pypdf/files/12253581/tt2.pdf"
+ name = "jpx_no_spacecode.pdf"
+ reader = PdfReader(BytesIO(get_pdf_from_url(url, name=name)))
+ im = reader.pages[0].images[0]
+ # create an object without filter and without colorspace
+ # just for coverage
+ del im.indirect_reference.get_object()["/Filter"]
+ with pytest.raises(PdfReadError) as exc:
+ reader.pages[0].images[0]
+ assert exc.value.args[0].startswith("ColorSpace field not found")