from PIL import Image from .helper import PillowTestCase, hopper class TestImageSplit(PillowTestCase): def test_split(self): def split(mode): layers = hopper(mode).split() return [(i.mode, i.size[0], i.size[1]) for i in layers] self.assertEqual(split("1"), [("1", 128, 128)]) self.assertEqual(split("L"), [("L", 128, 128)]) self.assertEqual(split("I"), [("I", 128, 128)]) self.assertEqual(split("F"), [("F", 128, 128)]) self.assertEqual(split("P"), [("P", 128, 128)]) self.assertEqual( split("RGB"), [("L", 128, 128), ("L", 128, 128), ("L", 128, 128)] ) self.assertEqual( split("RGBA"), [("L", 128, 128), ("L", 128, 128), ("L", 128, 128), ("L", 128, 128)], ) self.assertEqual( split("CMYK"), [("L", 128, 128), ("L", 128, 128), ("L", 128, 128), ("L", 128, 128)], ) self.assertEqual( split("YCbCr"), [("L", 128, 128), ("L", 128, 128), ("L", 128, 128)] ) def test_split_merge(self): def split_merge(mode): return Image.merge(mode, hopper(mode).split()) self.assert_image_equal(hopper("1"), split_merge("1")) self.assert_image_equal(hopper("L"), split_merge("L")) self.assert_image_equal(hopper("I"), split_merge("I")) self.assert_image_equal(hopper("F"), split_merge("F")) self.assert_image_equal(hopper("P"), split_merge("P")) self.assert_image_equal(hopper("RGB"), split_merge("RGB")) self.assert_image_equal(hopper("RGBA"), split_merge("RGBA")) self.assert_image_equal(hopper("CMYK"), split_merge("CMYK")) self.assert_image_equal(hopper("YCbCr"), split_merge("YCbCr")) def test_split_open(self): codecs = dir(Image.core) if "zip_encoder" in codecs: test_file = self.tempfile("temp.png") else: test_file = self.tempfile("temp.pcx") def split_open(mode): hopper(mode).save(test_file) with Image.open(test_file) as im: return len(im.split()) self.assertEqual(split_open("1"), 1) self.assertEqual(split_open("L"), 1) self.assertEqual(split_open("P"), 1) self.assertEqual(split_open("RGB"), 3) if "zip_encoder" in codecs: self.assertEqual(split_open("RGBA"), 4)