mirror of
https://github.com/python-pillow/Pillow.git
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241 lines
7.2 KiB
Python
241 lines
7.2 KiB
Python
from helper import unittest, PillowTestCase, hopper
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try:
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from PIL import PyAccess
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except ImportError:
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# Skip in setUp()
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pass
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from PIL import Image
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class AccessTest(PillowTestCase):
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# initial value
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_init_cffi_access = Image.USE_CFFI_ACCESS
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_need_cffi_access = False
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@classmethod
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def setUpClass(cls):
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Image.USE_CFFI_ACCESS = cls._need_cffi_access
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@classmethod
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def tearDownClass(cls):
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Image.USE_CFFI_ACCESS = cls._init_cffi_access
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class TestImagePutPixel(AccessTest):
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def test_sanity(self):
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im1 = hopper()
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im2 = Image.new(im1.mode, im1.size, 0)
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for y in range(im1.size[1]):
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for x in range(im1.size[0]):
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pos = x, y
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im2.putpixel(pos, im1.getpixel(pos))
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self.assert_image_equal(im1, im2)
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im2 = Image.new(im1.mode, im1.size, 0)
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im2.readonly = 1
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for y in range(im1.size[1]):
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for x in range(im1.size[0]):
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pos = x, y
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im2.putpixel(pos, im1.getpixel(pos))
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self.assertFalse(im2.readonly)
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self.assert_image_equal(im1, im2)
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im2 = Image.new(im1.mode, im1.size, 0)
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pix1 = im1.load()
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pix2 = im2.load()
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for y in range(im1.size[1]):
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for x in range(im1.size[0]):
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pix2[x, y] = pix1[x, y]
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self.assert_image_equal(im1, im2)
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class TestImageGetPixel(AccessTest):
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@staticmethod
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def color(mode):
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bands = Image.getmodebands(mode)
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if bands == 1:
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return 1
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else:
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return tuple(range(1, bands + 1))
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def check(self, mode, c=None):
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if not c:
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c = self.color(mode)
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# check putpixel
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im = Image.new(mode, (1, 1), None)
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im.putpixel((0, 0), c)
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self.assertEqual(
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im.getpixel((0, 0)), c,
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"put/getpixel roundtrip failed for mode %s, color %s" % (mode, c))
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# check inital color
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im = Image.new(mode, (1, 1), c)
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self.assertEqual(
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im.getpixel((0, 0)), c,
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"initial color failed for mode %s, color %s " % (mode, c))
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def test_basic(self):
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for mode in ("1", "L", "LA", "I", "I;16", "I;16B", "F",
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"P", "PA", "RGB", "RGBA", "RGBX", "CMYK", "YCbCr"):
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self.check(mode)
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def test_signedness(self):
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# see https://github.com/python-pillow/Pillow/issues/452
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# pixelaccess is using signed int* instead of uint*
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for mode in ("I;16", "I;16B"):
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self.check(mode, 2**15-1)
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self.check(mode, 2**15)
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self.check(mode, 2**15+1)
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self.check(mode, 2**16-1)
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class TestCffiPutPixel(TestImagePutPixel):
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_need_cffi_access = True
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def setUp(self):
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try:
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import cffi
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assert cffi # silence warning
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except ImportError:
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self.skipTest("No cffi")
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class TestCffiGetPixel(TestImageGetPixel):
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_need_cffi_access = True
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def setUp(self):
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try:
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import cffi
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assert cffi # silence warning
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except ImportError:
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self.skipTest("No cffi")
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class TestCffi(AccessTest):
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_need_cffi_access = True
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def setUp(self):
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try:
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import cffi
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assert cffi # silence warning
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except ImportError:
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self.skipTest("No cffi")
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def _test_get_access(self, im):
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"""Do we get the same thing as the old pixel access
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Using private interfaces, forcing a capi access and
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a pyaccess for the same image"""
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caccess = im.im.pixel_access(False)
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access = PyAccess.new(im, False)
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w, h = im.size
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for x in range(0, w, 10):
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for y in range(0, h, 10):
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self.assertEqual(access[(x, y)], caccess[(x, y)])
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# Access an out-of-range pixel
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self.assertRaises(ValueError,
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lambda: access[(access.xsize+1, access.ysize+1)])
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def test_get_vs_c(self):
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rgb = hopper('RGB')
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rgb.load()
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self._test_get_access(rgb)
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self._test_get_access(hopper('RGBA'))
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self._test_get_access(hopper('L'))
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self._test_get_access(hopper('LA'))
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self._test_get_access(hopper('1'))
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self._test_get_access(hopper('P'))
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# self._test_get_access(hopper('PA')) # PA -- how do I make a PA image?
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self._test_get_access(hopper('F'))
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im = Image.new('I;16', (10, 10), 40000)
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self._test_get_access(im)
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im = Image.new('I;16L', (10, 10), 40000)
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self._test_get_access(im)
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im = Image.new('I;16B', (10, 10), 40000)
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self._test_get_access(im)
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im = Image.new('I', (10, 10), 40000)
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self._test_get_access(im)
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# These don't actually appear to be modes that I can actually make,
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# as unpack sets them directly into the I mode.
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# im = Image.new('I;32L', (10, 10), -2**10)
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# self._test_get_access(im)
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# im = Image.new('I;32B', (10, 10), 2**10)
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# self._test_get_access(im)
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def _test_set_access(self, im, color):
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"""Are we writing the correct bits into the image?
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Using private interfaces, forcing a capi access and
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a pyaccess for the same image"""
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caccess = im.im.pixel_access(False)
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access = PyAccess.new(im, False)
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w, h = im.size
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for x in range(0, w, 10):
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for y in range(0, h, 10):
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access[(x, y)] = color
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self.assertEqual(color, caccess[(x, y)])
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# Attempt to set the value on a read-only image
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access = PyAccess.new(im, True)
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try:
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access[(0, 0)] = color
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except ValueError:
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return
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self.fail("Putpixel did not fail on a read-only image")
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def test_set_vs_c(self):
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rgb = hopper('RGB')
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rgb.load()
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self._test_set_access(rgb, (255, 128, 0))
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self._test_set_access(hopper('RGBA'), (255, 192, 128, 0))
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self._test_set_access(hopper('L'), 128)
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self._test_set_access(hopper('LA'), (128, 128))
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self._test_set_access(hopper('1'), 255)
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self._test_set_access(hopper('P'), 128)
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# self._test_set_access(i, (128, 128)) #PA -- undone how to make
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self._test_set_access(hopper('F'), 1024.0)
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im = Image.new('I;16', (10, 10), 40000)
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self._test_set_access(im, 45000)
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im = Image.new('I;16L', (10, 10), 40000)
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self._test_set_access(im, 45000)
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im = Image.new('I;16B', (10, 10), 40000)
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self._test_set_access(im, 45000)
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im = Image.new('I', (10, 10), 40000)
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self._test_set_access(im, 45000)
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# im = Image.new('I;32L', (10, 10), -(2**10))
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# self._test_set_access(im, -(2**13)+1)
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# im = Image.new('I;32B', (10, 10), 2**10)
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# self._test_set_access(im, 2**13-1)
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# ref https://github.com/python-pillow/Pillow/pull/2009
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def test_reference_counting(self):
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size = 10
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for _ in range(10):
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# Do not save references to the image, only to the access object
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px = Image.new('L', (size, 1), 0).load()
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for i in range(size):
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# pixels can contain garbage if image is released
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self.assertEqual(px[i, 0], 0)
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if __name__ == '__main__':
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unittest.main()
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