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143 lines
3.7 KiB
Python
143 lines
3.7 KiB
Python
from helper import unittest, PillowTestCase, hopper
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from PIL import Image
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class TestImageConvert(PillowTestCase):
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def test_sanity(self):
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def convert(im, mode):
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out = im.convert(mode)
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self.assertEqual(out.mode, mode)
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self.assertEqual(out.size, im.size)
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modes = "1", "L", "I", "F", "RGB", "RGBA", "RGBX", "CMYK", "YCbCr"
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for mode in modes:
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im = hopper(mode)
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for mode in modes:
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convert(im, mode)
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# Check 0
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im = Image.new(mode, (0,0))
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for mode in modes:
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convert(im, mode)
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def test_default(self):
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im = hopper("P")
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self.assert_image(im, "P", im.size)
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im = im.convert()
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self.assert_image(im, "RGB", im.size)
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im = im.convert()
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self.assert_image(im, "RGB", im.size)
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# ref https://github.com/python-pillow/Pillow/issues/274
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def _test_float_conversion(self, im):
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orig = im.getpixel((5, 5))
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converted = im.convert('F').getpixel((5, 5))
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self.assertEqual(orig, converted)
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def test_8bit(self):
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im = Image.open('Tests/images/hopper.jpg')
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self._test_float_conversion(im.convert('L'))
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def test_16bit(self):
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im = Image.open('Tests/images/16bit.cropped.tif')
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self._test_float_conversion(im)
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def test_16bit_workaround(self):
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im = Image.open('Tests/images/16bit.cropped.tif')
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self._test_float_conversion(im.convert('I'))
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def test_rgba_p(self):
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im = hopper('RGBA')
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im.putalpha(hopper('L'))
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converted = im.convert('P')
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comparable = converted.convert('RGBA')
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self.assert_image_similar(im, comparable, 20)
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def test_trns_p(self):
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im = hopper('P')
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im.info['transparency'] = 0
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f = self.tempfile('temp.png')
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l = im.convert('L')
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self.assertEqual(l.info['transparency'], 0) # undone
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l.save(f)
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rgb = im.convert('RGB')
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self.assertEqual(rgb.info['transparency'], (0, 0, 0)) # undone
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rgb.save(f)
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# ref https://github.com/python-pillow/Pillow/issues/664
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def test_trns_p_rgba(self):
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# Arrange
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im = hopper('P')
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im.info['transparency'] = 128
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# Act
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rgba = im.convert('RGBA')
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# Assert
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self.assertNotIn('transparency', rgba.info)
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def test_trns_l(self):
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im = hopper('L')
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im.info['transparency'] = 128
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f = self.tempfile('temp.png')
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rgb = im.convert('RGB')
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self.assertEqual(rgb.info['transparency'], (128, 128, 128)) # undone
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rgb.save(f)
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p = im.convert('P')
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self.assertIn('transparency', p.info)
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p.save(f)
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p = self.assert_warning(
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UserWarning,
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lambda: im.convert('P', palette=Image.ADAPTIVE))
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self.assertNotIn('transparency', p.info)
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p.save(f)
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def test_trns_RGB(self):
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im = hopper('RGB')
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im.info['transparency'] = im.getpixel((0, 0))
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f = self.tempfile('temp.png')
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l = im.convert('L')
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self.assertEqual(l.info['transparency'], l.getpixel((0, 0))) # undone
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l.save(f)
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p = im.convert('P')
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self.assertIn('transparency', p.info)
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p.save(f)
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p = self.assert_warning(
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UserWarning,
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lambda: im.convert('P', palette=Image.ADAPTIVE))
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self.assertNotIn('transparency', p.info)
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p.save(f)
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def test_p_la(self):
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im = hopper('RGBA')
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alpha = hopper('L')
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im.putalpha(alpha)
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comparable = im.convert('P').convert('LA').split()[1]
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self.assert_image_similar(alpha, comparable, 5)
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if __name__ == '__main__':
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unittest.main()
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