Merge pull request #3203 from radarhere/size

Changed Image size property to be read-only by default

Tests/test_file_icns.py

@@ -64,6 +64,10 @@ class TestFileIcns(PillowTestCase):
             self.assertEqual(im2.mode, 'RGBA')
             self.assertEqual(im2.size, (wr, hr))
 
+        # Check that we cannot load an incorrect size
+        with self.assertRaises(ValueError):
+            im.size = (1, 1)
+
     def test_older_icon(self):
         # This icon was made with Icon Composer rather than iconutil; it still
         # uses PNG rather than JP2, however (since it was made on 10.9).

Tests/test_file_ico.py

@@ -47,6 +47,11 @@ class TestFileIco(PillowTestCase):
         self.assert_image_equal(reloaded,
                                 hopper().resize((32, 32), Image.LANCZOS))
 
+    def test_incorrect_size(self):
+        im = Image.open(TEST_ICO_FILE)
+        with self.assertRaises(ValueError):
+            im.size = (1, 1)
+
     def test_save_256x256(self):
         """Issue #2264 https://github.com/python-pillow/Pillow/issues/2264"""
         # Arrange

Tests/test_file_tiff.py

@@ -69,6 +69,14 @@ class TestFileTiff(PillowTestCase):
         self.assertEqual(str(e.exception),
                          "Not allowing setting of legacy api")
 
+    def test_size(self):
+        filename = "Tests/images/pil168.tif"
+        im = Image.open(filename)
+
+        def set_size():
+            im.size = (256, 256)
+        self.assert_warning(DeprecationWarning, set_size)
+
     def test_xyres_tiff(self):
         filename = "Tests/images/pil168.tif"
         im = Image.open(filename)

Tests/test_image.py

@@ -56,9 +56,8 @@ class TestImage(PillowTestCase):
         self.assertEqual(im.width, 1)
         self.assertEqual(im.height, 2)
 
-        im.size = (3, 4)
+        with self.assertRaises(AttributeError) as e:
-        self.assertEqual(im.width, 3)
+            im.size = (3, 4)
-        self.assertEqual(im.height, 4)
 
     def test_invalid_image(self):
         if py3:

Tests/test_imagefile.py

@@ -154,7 +154,7 @@ class MockImageFile(ImageFile.ImageFile):
     def _open(self):
         self.rawmode = 'RGBA'
         self.mode = 'RGBA'
-        self.size = (200, 200)
+        self._size = (200, 200)
         self.tile = [("MOCK", (xoff, yoff, xoff+xsize, yoff+ysize), 32, None)]
 
 

docs/example/DdsImagePlugin.py

@@ -221,7 +221,7 @@ class DdsImageFile(ImageFile.ImageFile):
         header = BytesIO(header_bytes)
 
         flags, height, width = struct.unpack("<3I", header.read(12))
-        self.size = (width, height)
+        self._size = (width, height)
         self.mode = "RGBA"
 
         pitch, depth, mipmaps = struct.unpack("<3I", header.read(12))

docs/handbook/writing-your-own-file-decoder.rst

@@ -69,7 +69,7 @@ true color.
             header = string.split(header)
 
             # size in pixels (width, height)
-            self.size = int(header[1]), int(header[2])
+            self._size = int(header[1]), int(header[2])
 
             # mode setting
             bits = int(header[3])

docs/releasenotes/5.3.0.rst

@@ -39,6 +39,22 @@ and size, new method ``ImageOps.pad`` pads images to fill a requested aspect
 ratio and size, filling new space with a provided ``color`` and positioning the
 image within the new area through a ``centering`` argument.
 
+Image Size
+==========
+
+If you attempt to set the size of an image directly, e.g.
+``im.size = (100, 100)``, you will now receive an ``AttributeError``. This is
+not about removing existing functionality, but instead about raising an
+explicit error to prevent later consequences. The ``resize`` method is the
+correct way to change an image's size.
+
+The exceptions to this are:
+* The ICO and ICNS image formats, which use ``im.size = (100, 100)`` to select
+a subimage.
+* The TIFF image format, which now has a ``DeprecationWarning`` for this
+action, as direct image size setting was previously necessary to work around an
+issue with tile extents.
+
 Other Changes
 =============
 

src/PIL/BlpImagePlugin.py

@@ -270,7 +270,7 @@ class BlpImageFile(ImageFile.ImageFile):
         self._blp_alpha_encoding, = struct.unpack("<b", self.fp.read(1))
         self._blp_mips, = struct.unpack("<b", self.fp.read(1))
 
-        self.size = struct.unpack("<II", self.fp.read(8))
+        self._size = struct.unpack("<II", self.fp.read(8))
 
         if self.magic == b"BLP1":
             # Only present for BLP1

src/PIL/BmpImagePlugin.py

@@ -143,7 +143,7 @@ class BmpImageFile(ImageFile.ImageFile):
                           file_info['header_size'])
         # ------------------ Special case : header is reported 40, which
         # ---------------------- is shorter than real size for bpp >= 16
-        self.size = file_info['width'], file_info['height']
+        self._size = file_info['width'], file_info['height']
         # -------- If color count was not found in the header, compute from bits
         file_info['colors'] = file_info['colors'] if file_info.get('colors', 0) else (1 << file_info['bits'])
         # -------------------------------- Check abnormal values for DOS attacks

src/PIL/BufrStubImagePlugin.py

@@ -47,7 +47,7 @@ class BufrStubImageFile(ImageFile.StubImageFile):
 
         # make something up
         self.mode = "F"
-        self.size = 1, 1
+        self._size = 1, 1
 
         loader = self._load()
         if loader:

src/PIL/CurImagePlugin.py

@@ -63,7 +63,7 @@ class CurImageFile(BmpImagePlugin.BmpImageFile):
         self._bitmap(i32(m[12:]) + offset)
 
         # patch up the bitmap height
-        self.size = self.size[0], self.size[1]//2
+        self._size = self.size[0], self.size[1]//2
         d, e, o, a = self.tile[0]
         self.tile[0] = d, (0, 0)+self.size, o, a
 

src/PIL/DdsImagePlugin.py

@@ -114,7 +114,7 @@ class DdsImageFile(ImageFile.ImageFile):
         header = BytesIO(header_bytes)
 
         flags, height, width = struct.unpack("<3I", header.read(12))
-        self.size = (width, height)
+        self._size = (width, height)
         self.mode = "RGBA"
 
         pitch, depth, mipmaps = struct.unpack("<3I", header.read(12))

src/PIL/EpsImagePlugin.py

@@ -217,7 +217,7 @@ class EpsImageFile(ImageFile.ImageFile):
         box = None
 
         self.mode = "RGB"
-        self.size = 1, 1  # FIXME: huh?
+        self._size = 1, 1  # FIXME: huh?
 
         #
         # Load EPS header
@@ -244,7 +244,7 @@ class EpsImageFile(ImageFile.ImageFile):
                             # fields should be integers, but some drivers
                             # put floating point values there anyway.
                             box = [int(float(i)) for i in v.split()]
-                            self.size = box[2] - box[0], box[3] - box[1]
+                            self._size = box[2] - box[0], box[3] - box[1]
                             self.tile = [("eps", (0, 0) + self.size, offset,
                                           (length, box))]
                         except Exception:
@@ -293,7 +293,7 @@ class EpsImageFile(ImageFile.ImageFile):
                 except ValueError:
                     break
 
-                self.size = int(x), int(y)
+                self._size = int(x), int(y)
                 return
 
             s = fp.readline().strip('\r\n')
@@ -331,7 +331,7 @@ class EpsImageFile(ImageFile.ImageFile):
             return
         self.im = Ghostscript(self.tile, self.size, self.fp, scale)
         self.mode = self.im.mode
-        self.size = self.im.size
+        self._size = self.im.size
         self.tile = []
 
     def load_seek(self, *args, **kwargs):

src/PIL/FitsStubImagePlugin.py

@@ -50,7 +50,7 @@ class FITSStubImageFile(ImageFile.StubImageFile):
 
         # make something up
         self.mode = "F"
-        self.size = 1, 1
+        self._size = 1, 1
 
         loader = self._load()
         if loader:

src/PIL/FliImagePlugin.py

@@ -54,7 +54,7 @@ class FliImageFile(ImageFile.ImageFile):
 
         # image characteristics
         self.mode = "P"
-        self.size = i16(s[8:10]), i16(s[10:12])
+        self._size = i16(s[8:10]), i16(s[10:12])
 
         # animation speed
         duration = i32(s[16:20])

src/PIL/FpxImagePlugin.py

@@ -81,7 +81,7 @@ class FpxImageFile(ImageFile.ImageFile):
 
         # size (highest resolution)
 
-        self.size = prop[0x1000002], prop[0x1000003]
+        self._size = prop[0x1000002], prop[0x1000003]
 
         size = max(self.size)
         i = 1

src/PIL/FtexImagePlugin.py

@@ -61,7 +61,7 @@ class FtexImageFile(ImageFile.ImageFile):
     def _open(self):
         magic = struct.unpack("<I", self.fp.read(4))
         version = struct.unpack("<i", self.fp.read(4))
-        self.size = struct.unpack("<2i", self.fp.read(8))
+        self._size = struct.unpack("<2i", self.fp.read(8))
         mipmap_count, format_count = struct.unpack("<2i", self.fp.read(8))
 
         self.mode = "RGB"

src/PIL/GbrImagePlugin.py

@@ -74,7 +74,7 @@ class GbrImageFile(ImageFile.ImageFile):
         else:
             self.mode = 'RGBA'
 
-        self.size = width, height
+        self._size = width, height
 
         self.info["comment"] = comment
 

src/PIL/GdImageFile.py

@@ -49,7 +49,7 @@ class GdImageFile(ImageFile.ImageFile):
             raise SyntaxError("Not a valid GD 2.x .gd file")
 
         self.mode = "L"  # FIXME: "P"
-        self.size = i16(s[2:4]), i16(s[4:6])
+        self._size = i16(s[2:4]), i16(s[4:6])
 
         trueColor = i8(s[6])
         trueColorOffset = 2 if trueColor else 0

src/PIL/GifImagePlugin.py

@@ -65,7 +65,7 @@ class GifImageFile(ImageFile.ImageFile):
             raise SyntaxError("not a GIF file")
 
         self.info["version"] = s[:6]
-        self.size = i16(s[6:]), i16(s[8:])
+        self._size = i16(s[6:]), i16(s[8:])
         self.tile = []
         flags = i8(s[10])
         bits = (flags & 7) + 1

src/PIL/GribStubImagePlugin.py

@@ -48,7 +48,7 @@ class GribStubImageFile(ImageFile.StubImageFile):
 
         # make something up
         self.mode = "F"
-        self.size = 1, 1
+        self._size = 1, 1
 
         loader = self._load()
         if loader:

src/PIL/Hdf5StubImagePlugin.py

@@ -47,7 +47,7 @@ class HDF5StubImageFile(ImageFile.StubImageFile):
 
         # make something up
         self.mode = "F"
-        self.size = 1, 1
+        self._size = 1, 1
 
         loader = self._load()
         if loader:

src/PIL/IcnsImagePlugin.py

@@ -265,13 +265,33 @@ class IcnsImageFile(ImageFile.ImageFile):
     def _open(self):
         self.icns = IcnsFile(self.fp)
         self.mode = 'RGBA'
+        self.info['sizes'] = self.icns.itersizes()
         self.best_size = self.icns.bestsize()
         self.size = (self.best_size[0] * self.best_size[2],
                      self.best_size[1] * self.best_size[2])
-        self.info['sizes'] = self.icns.itersizes()
         # Just use this to see if it's loaded or not yet.
         self.tile = ('',)
 
+    @property
+    def size(self):
+        return self._size
+
+    @size.setter
+    def size(self, value):
+        info_size = value
+        if info_size not in self.info['sizes'] and len(info_size) == 2:
+            info_size = (info_size[0], info_size[1], 1)
+        if info_size not in self.info['sizes'] and len(info_size) == 3 and \
+           info_size[2] == 1:
+            simple_sizes = [(size[0] * size[2], size[1] * size[2])
+                           for size in self.info['sizes']]
+            if value in simple_sizes:
+                info_size = self.info['sizes'][simple_sizes.index(value)]
+        if info_size not in self.info['sizes']:
+            raise ValueError(
+                "This is not one of the allowed sizes of this image")
+        self._size = value
+
     def load(self):
         if len(self.size) == 3:
             self.best_size = self.size

src/PIL/IcoImagePlugin.py

@@ -169,7 +169,7 @@ class IcoFile(object):
             im = BmpImagePlugin.DibImageFile(self.buf)
 
             # change tile dimension to only encompass XOR image
-            im.size = (im.size[0], int(im.size[1] / 2))
+            im._size = (im.size[0], int(im.size[1] / 2))
             d, e, o, a = im.tile[0]
             im.tile[0] = d, (0, 0) + im.size, o, a
 
@@ -263,6 +263,17 @@ class IcoImageFile(ImageFile.ImageFile):
         self.size = self.ico.entry[0]['dim']
         self.load()
 
+    @property
+    def size(self):
+        return self._size
+
+    @size.setter
+    def size(self, value):
+        if value not in self.info['sizes']:
+            raise ValueError(
+                "This is not one of the allowed sizes of this image")
+        self._size = value
+
     def load(self):
         im = self.ico.getimage(self.size)
         # if tile is PNG, it won't really be loaded yet

src/PIL/ImImagePlugin.py

@@ -196,7 +196,7 @@ class ImImageFile(ImageFile.ImageFile):
             raise SyntaxError("Not an IM file")
 
         # Basic attributes
-        self.size = self.info[SIZE]
+        self._size = self.info[SIZE]
         self.mode = self.info[MODE]
 
         # Skip forward to start of image data

src/PIL/Image.py

@@ -531,7 +531,7 @@ class Image(object):
         # FIXME: turn mode and size into delegating properties?
         self.im = None
         self.mode = ""
-        self.size = (0, 0)
+        self._size = (0, 0)
         self.palette = None
         self.info = {}
         self.category = NORMAL
@@ -546,11 +546,15 @@ class Image(object):
     def height(self):
         return self.size[1]
 
+    @property
+    def size(self):
+        return self._size
+
     def _new(self, im):
         new = Image()
         new.im = im
         new.mode = im.mode
-        new.size = im.size
+        new._size = im.size
         if im.mode in ('P', 'PA'):
             if self.palette:
                 new.palette = self.palette.copy()
@@ -698,7 +702,7 @@ class Image(object):
         info, mode, size, palette, data = state
         self.info = info
         self.mode = mode
-        self.size = size
+        self._size = size
         self.im = core.new(mode, size)
         if mode in ("L", "P") and palette:
             self.putpalette(palette)
@@ -2104,7 +2108,7 @@ class Image(object):
 
         self.im = im.im
         self.mode = im.mode
-        self.size = size
+        self._size = size
 
         self.readonly = 0
         self.pyaccess = None

src/PIL/ImtImagePlugin.py

@@ -78,10 +78,10 @@ class ImtImageFile(ImageFile.ImageFile):
                 k, v = m.group(1, 2)
                 if k == "width":
                     xsize = int(v)
-                    self.size = xsize, ysize
+                    self._size = xsize, ysize
                 elif k == "height":
                     ysize = int(v)
-                    self.size = xsize, ysize
+                    self._size = xsize, ysize
                 elif k == "pixel" and v == "n8":
                     self.mode = "L"
 

src/PIL/IptcImagePlugin.py

@@ -118,7 +118,7 @@ class IptcImageFile(ImageFile.ImageFile):
             self.mode = "CMYK"[id]
 
         # size
-        self.size = self.getint((3, 20)), self.getint((3, 30))
+        self._size = self.getint((3, 20)), self.getint((3, 30))
 
         # compression
         try:

src/PIL/Jpeg2KImagePlugin.py

@@ -159,13 +159,13 @@ class Jpeg2KImageFile(ImageFile.ImageFile):
         sig = self.fp.read(4)
         if sig == b'\xff\x4f\xff\x51':
             self.codec = "j2k"
-            self.size, self.mode = _parse_codestream(self.fp)
+            self._size, self.mode = _parse_codestream(self.fp)
         else:
             sig = sig + self.fp.read(8)
 
             if sig == b'\x00\x00\x00\x0cjP  \x0d\x0a\x87\x0a':
                 self.codec = "jp2"
-                self.size, self.mode = _parse_jp2_header(self.fp)
+                self._size, self.mode = _parse_jp2_header(self.fp)
             else:
                 raise SyntaxError('not a JPEG 2000 file')
 
@@ -198,8 +198,8 @@ class Jpeg2KImageFile(ImageFile.ImageFile):
         if self.reduce:
             power = 1 << self.reduce
             adjust = power >> 1
-            self.size = (int((self.size[0] + adjust) / power),
+            self._size = (int((self.size[0] + adjust) / power),
-                         int((self.size[1] + adjust) / power))
+                          int((self.size[1] + adjust) / power))
 
         if self.tile:
             # Update the reduce and layers settings

src/PIL/JpegImagePlugin.py

@@ -159,7 +159,7 @@ def SOF(self, marker):
 
     n = i16(self.fp.read(2))-2
     s = ImageFile._safe_read(self.fp, n)
-    self.size = i16(s[3:]), i16(s[1:])
+    self._size = i16(s[3:]), i16(s[1:])
 
     self.bits = i8(s[0])
     if self.bits != 8:
@@ -390,7 +390,7 @@ class JpegImageFile(ImageFile.ImageFile):
                 if scale >= s:
                     break
             e = e[0], e[1], (e[2]-e[0]+s-1)//s+e[0], (e[3]-e[1]+s-1)//s+e[1]
-            self.size = ((self.size[0]+s-1)//s, (self.size[1]+s-1)//s)
+            self._size = ((self.size[0]+s-1)//s, (self.size[1]+s-1)//s)
             scale = s
 
         self.tile = [(d, e, o, a)]
@@ -423,7 +423,7 @@ class JpegImageFile(ImageFile.ImageFile):
                 pass
 
         self.mode = self.im.mode
-        self.size = self.im.size
+        self._size = self.im.size
 
         self.tile = []
 

src/PIL/McIdasImagePlugin.py

@@ -59,7 +59,7 @@ class McIdasImageFile(ImageFile.ImageFile):
             raise SyntaxError("unsupported McIdas format")
 
         self.mode = mode
-        self.size = w[10], w[9]
+        self._size = w[10], w[9]
 
         offset = w[34] + w[15]
         stride = w[15] + w[10]*w[11]*w[14]

src/PIL/MpegImagePlugin.py

@@ -72,7 +72,7 @@ class MpegImageFile(ImageFile.ImageFile):
             raise SyntaxError("not an MPEG file")
 
         self.mode = "RGB"
-        self.size = s.read(12), s.read(12)
+        self._size = s.read(12), s.read(12)
 
 
 # --------------------------------------------------------------------

src/PIL/MspImagePlugin.py

@@ -63,7 +63,7 @@ class MspImageFile(ImageFile.ImageFile):
             raise SyntaxError("bad MSP checksum")
 
         self.mode = "1"
-        self.size = i16(s[4:]), i16(s[6:])
+        self._size = i16(s[4:]), i16(s[6:])
 
         if s[:4] == b"DanM":
             self.tile = [("raw", (0, 0)+self.size, 32, ("1", 0, 1))]

src/PIL/PcdImagePlugin.py

@@ -48,14 +48,14 @@ class PcdImageFile(ImageFile.ImageFile):
             self.tile_post_rotate = -90
 
         self.mode = "RGB"
-        self.size = 768, 512  # FIXME: not correct for rotated images!
+        self._size = 768, 512  # FIXME: not correct for rotated images!
         self.tile = [("pcd", (0, 0)+self.size, 96*2048, None)]
 
     def load_end(self):
         if self.tile_post_rotate:
             # Handle rotated PCDs
             self.im = self.im.rotate(self.tile_post_rotate)
-            self.size = self.im.size
+            self._size = self.im.size
 
 
 #

src/PIL/PcxImagePlugin.py

@@ -100,7 +100,7 @@ class PcxImageFile(ImageFile.ImageFile):
             raise IOError("unknown PCX mode")
 
         self.mode = mode
-        self.size = bbox[2]-bbox[0], bbox[3]-bbox[1]
+        self._size = bbox[2]-bbox[0], bbox[3]-bbox[1]
 
         bbox = (0, 0) + self.size
         logger.debug("size: %sx%s", *self.size)

src/PIL/PixarImagePlugin.py

@@ -50,7 +50,7 @@ class PixarImageFile(ImageFile.ImageFile):
         # read rest of header
         s = s + self.fp.read(508)
 
-        self.size = i16(s[418:420]), i16(s[416:418])
+        self._size = i16(s[418:420]), i16(s[416:418])
 
         # get channel/depth descriptions
         mode = i16(s[424:426]), i16(s[426:428])

src/PIL/PngImagePlugin.py

@@ -577,7 +577,7 @@ class PngImageFile(ImageFile.ImageFile):
         # (believe me, I've tried ;-)
 
         self.mode = self.png.im_mode
-        self.size = self.png.im_size
+        self._size = self.png.im_size
         self.info = self.png.im_info
         self.text = self.png.im_text  # experimental
         self.tile = self.png.im_tile

src/PIL/PpmImagePlugin.py

@@ -107,7 +107,7 @@ class PpmImageFile(ImageFile.ImageFile):
                         self.mode = 'I'
                         rawmode = 'I;32B'
 
-        self.size = xsize, ysize
+        self._size = xsize, ysize
         self.tile = [("raw",
                      (0, 0, xsize, ysize),
                      self.fp.tell(),

src/PIL/PsdImagePlugin.py

@@ -71,7 +71,7 @@ class PsdImageFile(ImageFile.ImageFile):
             raise IOError("not enough channels")
 
         self.mode = mode
-        self.size = i32(s[18:]), i32(s[14:])
+        self._size = i32(s[18:]), i32(s[14:])
 
         #
         # color mode data

src/PIL/SgiImagePlugin.py

@@ -96,7 +96,7 @@ class SgiImageFile(ImageFile.ImageFile):
         if rawmode == "":
             raise ValueError("Unsupported SGI image mode")
 
-        self.size = xsize, ysize
+        self._size = xsize, ysize
         self.mode = rawmode.split(";")[0]
 
         # orientation -1 : scanlines begins at the bottom-left corner

src/PIL/SpiderImagePlugin.py

@@ -120,7 +120,7 @@ class SpiderImageFile(ImageFile.ImageFile):
         if iform != 1:
             raise SyntaxError("not a Spider 2D image")
 
-        self.size = int(h[12]), int(h[2])  # size in pixels (width, height)
+        self._size = int(h[12]), int(h[2])  # size in pixels (width, height)
         self.istack = int(h[24])
         self.imgnumber = int(h[27])
 

src/PIL/SunImagePlugin.py

@@ -59,7 +59,7 @@ class SunImageFile(ImageFile.ImageFile):
 
         offset = 32
 
-        self.size = i32(s[4:8]), i32(s[8:12])
+        self._size = i32(s[4:8]), i32(s[8:12])
 
         depth = i32(s[12:16])
         # data_length = i32(s[16:20])   # unreliable, ignore.

src/PIL/TgaImagePlugin.py

@@ -64,7 +64,7 @@ class TgaImageFile(ImageFile.ImageFile):
 
         flags = i8(s[17])
 
-        self.size = i16(s[12:]), i16(s[14:])
+        self._size = i16(s[12:]), i16(s[14:])
 
         # validate header fields
         if colormaptype not in (0, 1) or\

src/PIL/TiffImagePlugin.py

@@ -1049,6 +1049,19 @@ class TiffImageFile(ImageFile.ImageFile):
         "Return the current frame number"
         return self.__frame
 
+    @property
+    def size(self):
+        return self._size
+
+    @size.setter
+    def size(self, value):
+        warnings.warn(
+            'Setting the size of a TIFF image directly is deprecated, and will'
+            ' be removed in a future version. Use the resize method instead.',
+            DeprecationWarning
+        )
+        self._size = value
+
     def load(self):
         if self.use_load_libtiff:
             return self._load_libtiff()
@@ -1174,7 +1187,7 @@ class TiffImageFile(ImageFile.ImageFile):
         # size
         xsize = self.tag_v2.get(IMAGEWIDTH)
         ysize = self.tag_v2.get(IMAGELENGTH)
-        self.size = xsize, ysize
+        self._size = xsize, ysize
 
         if DEBUG:
             print("- size:", self.size)

src/PIL/WebPImagePlugin.py

@@ -50,7 +50,7 @@ class WebPImageFile(ImageFile.ImageFile):
                 self.info["icc_profile"] = icc_profile
             if exif:
                 self.info["exif"] = exif
-            self.size = width, height
+            self._size = width, height
             self.fp = BytesIO(data)
             self.tile = [("raw", (0, 0) + self.size, 0, self.mode)]
             self._n_frames = 1
@@ -63,7 +63,7 @@ class WebPImageFile(ImageFile.ImageFile):
         # Get info from decoder
         width, height, loop_count, bgcolor, frame_count, mode = \
             self._decoder.get_info()
-        self.size = width, height
+        self._size = width, height
         self.info["loop"] = loop_count
         bg_a, bg_r, bg_g, bg_b = \
             (bgcolor >> 24) & 0xFF, \

src/PIL/WmfImagePlugin.py

@@ -143,7 +143,7 @@ class WmfStubImageFile(ImageFile.StubImageFile):
             raise SyntaxError("Unsupported file format")
 
         self.mode = "RGB"
-        self.size = size
+        self._size = size
 
         loader = self._load()
         if loader:

src/PIL/XVThumbImagePlugin.py

@@ -65,7 +65,7 @@ class XVThumbImageFile(ImageFile.ImageFile):
         s = s.strip().split()
 
         self.mode = "P"
-        self.size = int(s[0]), int(s[1])
+        self._size = int(s[0]), int(s[1])
 
         self.palette = ImagePalette.raw("RGB", PALETTE)
 

src/PIL/XbmImagePlugin.py

@@ -63,7 +63,7 @@ class XbmImageFile(ImageFile.ImageFile):
                     )
 
             self.mode = "1"
-            self.size = xsize, ysize
+            self._size = xsize, ysize
 
             self.tile = [("xbm", (0, 0)+self.size, m.end(), None)]
 

src/PIL/XpmImagePlugin.py

@@ -51,7 +51,7 @@ class XpmImageFile(ImageFile.ImageFile):
             if m:
                 break
 
-        self.size = int(m.group(1)), int(m.group(2))
+        self._size = int(m.group(1)), int(m.group(2))
 
         pal = int(m.group(3))
         bpp = int(m.group(4))