mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-14 05:36:48 +03:00
365 lines
11 KiB
Python
365 lines
11 KiB
Python
from PIL import Image, ImageChops
|
|
|
|
from .helper import PillowTestCase, hopper
|
|
|
|
BLACK = (0, 0, 0)
|
|
BROWN = (127, 64, 0)
|
|
CYAN = (0, 255, 255)
|
|
DARK_GREEN = (0, 128, 0)
|
|
GREEN = (0, 255, 0)
|
|
ORANGE = (255, 128, 0)
|
|
WHITE = (255, 255, 255)
|
|
|
|
GREY = 128
|
|
|
|
|
|
class TestImageChops(PillowTestCase):
|
|
def test_sanity(self):
|
|
|
|
im = hopper("L")
|
|
|
|
ImageChops.constant(im, 128)
|
|
ImageChops.duplicate(im)
|
|
ImageChops.invert(im)
|
|
ImageChops.lighter(im, im)
|
|
ImageChops.darker(im, im)
|
|
ImageChops.difference(im, im)
|
|
ImageChops.multiply(im, im)
|
|
ImageChops.screen(im, im)
|
|
|
|
ImageChops.add(im, im)
|
|
ImageChops.add(im, im, 2.0)
|
|
ImageChops.add(im, im, 2.0, 128)
|
|
ImageChops.subtract(im, im)
|
|
ImageChops.subtract(im, im, 2.0)
|
|
ImageChops.subtract(im, im, 2.0, 128)
|
|
|
|
ImageChops.add_modulo(im, im)
|
|
ImageChops.subtract_modulo(im, im)
|
|
|
|
ImageChops.blend(im, im, 0.5)
|
|
ImageChops.composite(im, im, im)
|
|
|
|
ImageChops.offset(im, 10)
|
|
ImageChops.offset(im, 10, 20)
|
|
|
|
def test_add(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.add(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 25, 76, 76))
|
|
self.assertEqual(new.getpixel((50, 50)), ORANGE)
|
|
|
|
def test_add_scale_offset(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.add(im1, im2, scale=2.5, offset=100)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (0, 0, 100, 100))
|
|
self.assertEqual(new.getpixel((50, 50)), (202, 151, 100))
|
|
|
|
def test_add_clip(self):
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
new = ImageChops.add(im, im)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (255, 255, 254))
|
|
|
|
def test_add_modulo(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.add_modulo(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 25, 76, 76))
|
|
self.assertEqual(new.getpixel((50, 50)), ORANGE)
|
|
|
|
def test_add_modulo_no_clip(self):
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
new = ImageChops.add_modulo(im, im)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (224, 76, 254))
|
|
|
|
def test_blend(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.blend(im1, im2, 0.5)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 25, 76, 76))
|
|
self.assertEqual(new.getpixel((50, 50)), BROWN)
|
|
|
|
def test_constant(self):
|
|
# Arrange
|
|
im = Image.new("RGB", (20, 10))
|
|
|
|
# Act
|
|
new = ImageChops.constant(im, GREY)
|
|
|
|
# Assert
|
|
self.assertEqual(new.size, im.size)
|
|
self.assertEqual(new.getpixel((0, 0)), GREY)
|
|
self.assertEqual(new.getpixel((19, 9)), GREY)
|
|
|
|
def test_darker_image(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.darker(im1, im2)
|
|
|
|
# Assert
|
|
self.assert_image_equal(new, im2)
|
|
|
|
def test_darker_pixel(self):
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.darker(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (240, 166, 0))
|
|
|
|
def test_difference(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_arc_end_le_start.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_arc_no_loops.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.difference(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 25, 76, 76))
|
|
|
|
def test_difference_pixel(self):
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_polygon_kite_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.difference(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (240, 166, 128))
|
|
|
|
def test_duplicate(self):
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
new = ImageChops.duplicate(im)
|
|
|
|
# Assert
|
|
self.assert_image_equal(new, im)
|
|
|
|
def test_invert(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im:
|
|
|
|
# Act
|
|
new = ImageChops.invert(im)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (0, 0, 100, 100))
|
|
self.assertEqual(new.getpixel((0, 0)), WHITE)
|
|
self.assertEqual(new.getpixel((50, 50)), CYAN)
|
|
|
|
def test_lighter_image(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.lighter(im1, im2)
|
|
|
|
# Assert
|
|
self.assert_image_equal(new, im1)
|
|
|
|
def test_lighter_pixel(self):
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.lighter(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (255, 255, 127))
|
|
|
|
def test_multiply_black(self):
|
|
"""If you multiply an image with a solid black image,
|
|
the result is black."""
|
|
# Arrange
|
|
im1 = hopper()
|
|
black = Image.new("RGB", im1.size, "black")
|
|
|
|
# Act
|
|
new = ImageChops.multiply(im1, black)
|
|
|
|
# Assert
|
|
self.assert_image_equal(new, black)
|
|
|
|
def test_multiply_green(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im:
|
|
green = Image.new("RGB", im.size, "green")
|
|
|
|
# Act
|
|
new = ImageChops.multiply(im, green)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 25, 76, 76))
|
|
self.assertEqual(new.getpixel((25, 25)), DARK_GREEN)
|
|
self.assertEqual(new.getpixel((50, 50)), BLACK)
|
|
|
|
def test_multiply_white(self):
|
|
"""If you multiply with a solid white image,
|
|
the image is unaffected."""
|
|
# Arrange
|
|
im1 = hopper()
|
|
white = Image.new("RGB", im1.size, "white")
|
|
|
|
# Act
|
|
new = ImageChops.multiply(im1, white)
|
|
|
|
# Assert
|
|
self.assert_image_equal(new, im1)
|
|
|
|
def test_offset(self):
|
|
# Arrange
|
|
xoffset = 45
|
|
yoffset = 20
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im:
|
|
|
|
# Act
|
|
new = ImageChops.offset(im, xoffset, yoffset)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (0, 45, 100, 96))
|
|
self.assertEqual(new.getpixel((50, 50)), BLACK)
|
|
self.assertEqual(new.getpixel((50 + xoffset, 50 + yoffset)), DARK_GREEN)
|
|
|
|
# Test no yoffset
|
|
self.assertEqual(
|
|
ImageChops.offset(im, xoffset), ImageChops.offset(im, xoffset, xoffset)
|
|
)
|
|
|
|
def test_screen(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.screen(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 25, 76, 76))
|
|
self.assertEqual(new.getpixel((50, 50)), ORANGE)
|
|
|
|
def test_subtract(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.subtract(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 50, 76, 76))
|
|
self.assertEqual(new.getpixel((50, 50)), GREEN)
|
|
self.assertEqual(new.getpixel((50, 51)), BLACK)
|
|
|
|
def test_subtract_scale_offset(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.subtract(im1, im2, scale=2.5, offset=100)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (0, 0, 100, 100))
|
|
self.assertEqual(new.getpixel((50, 50)), (100, 202, 100))
|
|
|
|
def test_subtract_clip(self):
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.subtract(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (0, 0, 127))
|
|
|
|
def test_subtract_modulo(self):
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
|
|
with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.subtract_modulo(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getbbox(), (25, 50, 76, 76))
|
|
self.assertEqual(new.getpixel((50, 50)), GREEN)
|
|
self.assertEqual(new.getpixel((50, 51)), BLACK)
|
|
|
|
def test_subtract_modulo_no_clip(self):
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
|
|
# Act
|
|
new = ImageChops.subtract_modulo(im1, im2)
|
|
|
|
# Assert
|
|
self.assertEqual(new.getpixel((50, 50)), (241, 167, 127))
|
|
|
|
def test_logical(self):
|
|
def table(op, a, b):
|
|
out = []
|
|
for x in (a, b):
|
|
imx = Image.new("1", (1, 1), x)
|
|
for y in (a, b):
|
|
imy = Image.new("1", (1, 1), y)
|
|
out.append(op(imx, imy).getpixel((0, 0)))
|
|
return tuple(out)
|
|
|
|
self.assertEqual(table(ImageChops.logical_and, 0, 1), (0, 0, 0, 255))
|
|
self.assertEqual(table(ImageChops.logical_or, 0, 1), (0, 255, 255, 255))
|
|
self.assertEqual(table(ImageChops.logical_xor, 0, 1), (0, 255, 255, 0))
|
|
|
|
self.assertEqual(table(ImageChops.logical_and, 0, 128), (0, 0, 0, 255))
|
|
self.assertEqual(table(ImageChops.logical_or, 0, 128), (0, 255, 255, 255))
|
|
self.assertEqual(table(ImageChops.logical_xor, 0, 128), (0, 255, 255, 0))
|
|
|
|
self.assertEqual(table(ImageChops.logical_and, 0, 255), (0, 0, 0, 255))
|
|
self.assertEqual(table(ImageChops.logical_or, 0, 255), (0, 255, 255, 255))
|
|
self.assertEqual(table(ImageChops.logical_xor, 0, 255), (0, 255, 255, 0))
|