Pillow/Tests/test_file_tiff.py

from helper import unittest, PillowTestCase, lena, py3

from PIL import Image


class TestFileTiff(PillowTestCase):

    def test_sanity(self):

        file = self.tempfile("temp.tif")

        lena("RGB").save(file)

        im = Image.open(file)
        im.load()
        self.assertEqual(im.mode, "RGB")
        self.assertEqual(im.size, (128, 128))
        self.assertEqual(im.format, "TIFF")

        lena("1").save(file)
        im = Image.open(file)

        lena("L").save(file)
        im = Image.open(file)

        lena("P").save(file)
        im = Image.open(file)

        lena("RGB").save(file)
        im = Image.open(file)

        lena("I").save(file)
        im = Image.open(file)

    def test_mac_tiff(self):
        # Read RGBa images from Mac OS X [@PIL136]

        file = "Tests/images/pil136.tiff"
        im = Image.open(file)

        self.assertEqual(im.mode, "RGBA")
        self.assertEqual(im.size, (55, 43))
        self.assertEqual(im.tile, [('raw', (0, 0, 55, 43), 8, ('RGBa', 0, 1))])
        im.load()

    def test_gimp_tiff(self):
        # Read TIFF JPEG images from GIMP [@PIL168]

        codecs = dir(Image.core)
        if "jpeg_decoder" not in codecs:
            self.skipTest("jpeg support not available")

        file = "Tests/images/pil168.tif"
        im = Image.open(file)

        self.assertEqual(im.mode, "RGB")
        self.assertEqual(im.size, (256, 256))
        self.assertEqual(
            im.tile, [
                ('jpeg', (0, 0, 256, 64), 8, ('RGB', '')),
                ('jpeg', (0, 64, 256, 128), 1215, ('RGB', '')),
                ('jpeg', (0, 128, 256, 192), 2550, ('RGB', '')),
                ('jpeg', (0, 192, 256, 256), 3890, ('RGB', '')),
                ])
        im.load()

    def test_xyres_tiff(self):
        from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
        file = "Tests/images/pil168.tif"
        im = Image.open(file)
        assert isinstance(im.tag.tags[X_RESOLUTION][0], tuple)
        assert isinstance(im.tag.tags[Y_RESOLUTION][0], tuple)
        # Try to read a file where X,Y_RESOLUTION are ints
        im.tag.tags[X_RESOLUTION] = (72,)
        im.tag.tags[Y_RESOLUTION] = (72,)
        im._setup()
        self.assertEqual(im.info['dpi'], (72., 72.))

    def test_little_endian(self):
        im = Image.open('Tests/images/16bit.cropped.tif')
        self.assertEqual(im.getpixel((0, 0)), 480)
        self.assertEqual(im.mode, 'I;16')

        b = im.tobytes()
        # Bytes are in image native order (little endian)
        if py3:
            self.assertEqual(b[0], ord(b'\xe0'))
            self.assertEqual(b[1], ord(b'\x01'))
        else:
            self.assertEqual(b[0], b'\xe0')
            self.assertEqual(b[1], b'\x01')

    def test_big_endian(self):
        im = Image.open('Tests/images/16bit.MM.cropped.tif')
        self.assertEqual(im.getpixel((0, 0)), 480)
        self.assertEqual(im.mode, 'I;16B')

        b = im.tobytes()

        # Bytes are in image native order (big endian)
        if py3:
            self.assertEqual(b[0], ord(b'\x01'))
            self.assertEqual(b[1], ord(b'\xe0'))
        else:
            self.assertEqual(b[0], b'\x01')
            self.assertEqual(b[1], b'\xe0')

    def test_12bit_rawmode(self):
        """ Are we generating the same interpretation
        of the image as Imagemagick is? """

        # Image.DEBUG = True
        im = Image.open('Tests/images/12bit.cropped.tif')

        # to make the target --
        # convert 12bit.cropped.tif -depth 16 tmp.tif
        # convert tmp.tif -evaluate RightShift 4 12in16bit2.tif
        # imagemagick will auto scale so that a 12bit FFF is 16bit FFF0,
        # so we need to unshift so that the integer values are the same.

        im2 = Image.open('Tests/images/12in16bit.tif')

        if Image.DEBUG:
            print (im.getpixel((0, 0)))
            print (im.getpixel((0, 1)))
            print (im.getpixel((0, 2)))

            print (im2.getpixel((0, 0)))
            print (im2.getpixel((0, 1)))
            print (im2.getpixel((0, 2)))

        self.assert_image_equal(im, im2)

    def test_32bit_float(self):
        # Issue 614, specific 32 bit float format
        path = 'Tests/images/10ct_32bit_128.tiff'
        im = Image.open(path)
        im.load()

        self.assertEqual(im.getpixel((0, 0)), -0.4526388943195343)
        self.assertEqual(
            im.getextrema(), (-3.140936851501465, 3.140684127807617))


if __name__ == '__main__':
    unittest.main()

# End of file