Use different parameter than the existing interface

PIL/Image.py

@@ -2074,7 +2074,8 @@ def thumbnail(self, size, resample=BICUBIC):
 
     # FIXME: the different transform methods need further explanation
     # instead of bloating the method docs, add a separate chapter.
-    def transform(self, size, method, data=None, resample=NEAREST, fill=None):
+    def transform(self, size, method, data=None, resample=NEAREST,
+                  fill=1, fillcolor=None):
         """
         Transforms this image.  This method creates a new image with the
         given size, and the same mode as the original, and copies data
@@ -2095,7 +2096,7 @@ def transform(self, size, method, data=None, resample=NEAREST, fill=None):
            environment), or :py:attr:`PIL.Image.BICUBIC` (cubic spline
            interpolation in a 4x4 environment). If omitted, or if the image
            has mode "1" or "P", it is set to :py:attr:`PIL.Image.NEAREST`.
-        :param fill: Optional fill color for the area outside the transform
+        :param fillcolor: Optional fill color for the area outside the transform
            in the output image.
         :returns: An :py:class:`~PIL.Image.Image` object.
         """
@@ -2109,7 +2110,6 @@ def transform(self, size, method, data=None, resample=NEAREST, fill=None):
                 size, method, data, resample, fill).convert('RGBA')
 
         if isinstance(method, ImageTransformHandler):
-            fill = 1
             return method.transform(size, self, resample=resample, fill=fill)
 
         if hasattr(method, "getdata"):
@@ -2119,13 +2119,15 @@ def transform(self, size, method, data=None, resample=NEAREST, fill=None):
         if data is None:
             raise ValueError("missing method data")
 
-        im = new(self.mode, size, fill)
+        im = new(self.mode, size, fillcolor)
         if method == MESH:
             # list of quads
             for box, quad in data:
-                im.__transformer(box, self, QUAD, quad, resample, fill is None)
+                im.__transformer(box, self, QUAD, quad, resample,
+                                 fillcolor is None)
         else:
-            im.__transformer((0, 0)+size, self, method, data, resample, fill is None)
+            im.__transformer((0, 0)+size, self, method, data,
+                             resample, fillcolor is None)
 
         return im