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128 lines
3.9 KiB
Python
128 lines
3.9 KiB
Python
from PIL import Image, ImageFile, PcxImagePlugin
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from .helper import PillowTestCase, assert_image_equal, hopper
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class TestFilePcx(PillowTestCase):
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def _roundtrip(self, im):
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f = self.tempfile("temp.pcx")
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im.save(f)
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with Image.open(f) as im2:
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self.assertEqual(im2.mode, im.mode)
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self.assertEqual(im2.size, im.size)
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self.assertEqual(im2.format, "PCX")
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self.assertEqual(im2.get_format_mimetype(), "image/x-pcx")
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assert_image_equal(im2, im)
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def test_sanity(self):
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for mode in ("1", "L", "P", "RGB"):
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self._roundtrip(hopper(mode))
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# Test an unsupported mode
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f = self.tempfile("temp.pcx")
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im = hopper("RGBA")
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self.assertRaises(ValueError, im.save, f)
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def test_invalid_file(self):
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invalid_file = "Tests/images/flower.jpg"
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self.assertRaises(SyntaxError, PcxImagePlugin.PcxImageFile, invalid_file)
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def test_odd(self):
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# see issue #523, odd sized images should have a stride that's even.
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# not that imagemagick or gimp write pcx that way.
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# we were not handling properly.
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for mode in ("1", "L", "P", "RGB"):
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# larger, odd sized images are better here to ensure that
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# we handle interrupted scan lines properly.
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self._roundtrip(hopper(mode).resize((511, 511)))
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def test_pil184(self):
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# Check reading of files where xmin/xmax is not zero.
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test_file = "Tests/images/pil184.pcx"
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with Image.open(test_file) as im:
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self.assertEqual(im.size, (447, 144))
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self.assertEqual(im.tile[0][1], (0, 0, 447, 144))
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# Make sure all pixels are either 0 or 255.
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self.assertEqual(im.histogram()[0] + im.histogram()[255], 447 * 144)
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def test_1px_width(self):
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im = Image.new("L", (1, 256))
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px = im.load()
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for y in range(256):
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px[0, y] = y
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self._roundtrip(im)
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def test_large_count(self):
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im = Image.new("L", (256, 1))
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px = im.load()
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for x in range(256):
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px[x, 0] = x // 67 * 67
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self._roundtrip(im)
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def _test_buffer_overflow(self, im, size=1024):
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_last = ImageFile.MAXBLOCK
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ImageFile.MAXBLOCK = size
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try:
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self._roundtrip(im)
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finally:
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ImageFile.MAXBLOCK = _last
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def test_break_in_count_overflow(self):
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im = Image.new("L", (256, 5))
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px = im.load()
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for y in range(4):
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for x in range(256):
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px[x, y] = x % 128
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self._test_buffer_overflow(im)
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def test_break_one_in_loop(self):
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im = Image.new("L", (256, 5))
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px = im.load()
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for y in range(5):
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for x in range(256):
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px[x, y] = x % 128
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self._test_buffer_overflow(im)
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def test_break_many_in_loop(self):
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im = Image.new("L", (256, 5))
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px = im.load()
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for y in range(4):
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for x in range(256):
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px[x, y] = x % 128
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for x in range(8):
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px[x, 4] = 16
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self._test_buffer_overflow(im)
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def test_break_one_at_end(self):
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im = Image.new("L", (256, 5))
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px = im.load()
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for y in range(5):
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for x in range(256):
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px[x, y] = x % 128
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px[0, 3] = 128 + 64
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self._test_buffer_overflow(im)
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def test_break_many_at_end(self):
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im = Image.new("L", (256, 5))
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px = im.load()
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for y in range(5):
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for x in range(256):
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px[x, y] = x % 128
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for x in range(4):
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px[x * 2, 3] = 128 + 64
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px[x + 256 - 4, 3] = 0
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self._test_buffer_overflow(im)
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def test_break_padding(self):
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im = Image.new("L", (257, 5))
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px = im.load()
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for y in range(5):
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for x in range(257):
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px[x, y] = x % 128
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for x in range(5):
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px[x, 3] = 0
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self._test_buffer_overflow(im)
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