src/ tests/: allow construction of Pixmap from Pixmap with colorspace…

…=None.

This addresses #3177.

src/__init__.py

@@ -9463,11 +9463,13 @@ def __init__(self, *args):
  pm = mupdf.fz_new_pixmap_with_bbox(cs, JM_irect_from_py(rect), mupdf.FzSeparations(0), alpha)
  self.this = pm
 
- elif args_match(args, (Colorspace, mupdf.FzColorspace), (Pixmap, mupdf.FzPixmap)):
+ elif args_match(args, (Colorspace, mupdf.FzColorspace, type(None)), (Pixmap, mupdf.FzPixmap)):
  # copy pixmap, converting colorspace
  cs, spix = args
  if isinstance(cs, Colorspace):
  cs = cs.this
+ elif cs is None:
+ cs = mupdf.FzColorspace(None)
  if isinstance(spix, Pixmap):
  spix = spix.this
  if not mupdf.fz_pixmap_colorspace(spix).m_internal:
@@ -17965,7 +17967,8 @@ def args_match(args, *types):
  Returns true if <args> matches <types>.
 
  Each item in <types> is a type or tuple of types. Any of these types will
- match an item in <args>. None will match anything in <args>.
+ match an item in <args>. `None` will match anything in <args>. `type(None)`
+ will match an arg whose value is `None`.
  '''
  j = 0
  for i in range(len(types)):

tests/test_pixmap.py

@@ -245,3 +245,7 @@ def test_3134():
  print(f'{stat_irect=}')
  assert stat_rect.st_size == stat_irect.st_size
 
+def test_3177():
+ path = os.path.abspath(f'{__file__}/../../tests/resources/img-transparent.png')
+ pixmap = fitz.Pixmap(path)
+ pixmap2 = fitz.Pixmap(None, pixmap)