mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-26 09:56:17 +03:00
408 lines
10 KiB
Python
408 lines
10 KiB
Python
from PIL import Image, ImageChops
|
|
|
|
from .helper import assert_image_equal, 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
|
|
|
|
|
|
def test_sanity():
|
|
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.soft_light(im, im)
|
|
ImageChops.hard_light(im, im)
|
|
ImageChops.overlay(im, im)
|
|
|
|
ImageChops.offset(im, 10)
|
|
ImageChops.offset(im, 10, 20)
|
|
|
|
|
|
def test_add():
|
|
# 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
|
|
assert new.getbbox() == (25, 25, 76, 76)
|
|
assert new.getpixel((50, 50)) == ORANGE
|
|
|
|
|
|
def test_add_scale_offset():
|
|
# 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
|
|
assert new.getbbox() == (0, 0, 100, 100)
|
|
assert new.getpixel((50, 50)) == (202, 151, 100)
|
|
|
|
|
|
def test_add_clip():
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
new = ImageChops.add(im, im)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (255, 255, 254)
|
|
|
|
|
|
def test_add_modulo():
|
|
# 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
|
|
assert new.getbbox() == (25, 25, 76, 76)
|
|
assert new.getpixel((50, 50)) == ORANGE
|
|
|
|
|
|
def test_add_modulo_no_clip():
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
new = ImageChops.add_modulo(im, im)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (224, 76, 254)
|
|
|
|
|
|
def test_blend():
|
|
# 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
|
|
assert new.getbbox() == (25, 25, 76, 76)
|
|
assert new.getpixel((50, 50)) == BROWN
|
|
|
|
|
|
def test_constant():
|
|
# Arrange
|
|
im = Image.new("RGB", (20, 10))
|
|
|
|
# Act
|
|
new = ImageChops.constant(im, GREY)
|
|
|
|
# Assert
|
|
assert new.size == im.size
|
|
assert new.getpixel((0, 0)) == GREY
|
|
assert new.getpixel((19, 9)) == GREY
|
|
|
|
|
|
def test_darker_image():
|
|
# 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
|
|
assert_image_equal(new, im2)
|
|
|
|
|
|
def test_darker_pixel():
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
# Act
|
|
new = ImageChops.darker(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (240, 166, 0)
|
|
|
|
|
|
def test_difference():
|
|
# 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
|
|
assert new.getbbox() == (25, 25, 76, 76)
|
|
|
|
|
|
def test_difference_pixel():
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_polygon_kite_RGB.png") as im2:
|
|
# Act
|
|
new = ImageChops.difference(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (240, 166, 128)
|
|
|
|
|
|
def test_duplicate():
|
|
# Arrange
|
|
im = hopper()
|
|
|
|
# Act
|
|
new = ImageChops.duplicate(im)
|
|
|
|
# Assert
|
|
assert_image_equal(new, im)
|
|
|
|
|
|
def test_invert():
|
|
# Arrange
|
|
with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im:
|
|
# Act
|
|
new = ImageChops.invert(im)
|
|
|
|
# Assert
|
|
assert new.getbbox() == (0, 0, 100, 100)
|
|
assert new.getpixel((0, 0)) == WHITE
|
|
assert new.getpixel((50, 50)) == CYAN
|
|
|
|
|
|
def test_lighter_image():
|
|
# 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
|
|
assert_image_equal(new, im1)
|
|
|
|
|
|
def test_lighter_pixel():
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
# Act
|
|
new = ImageChops.lighter(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (255, 255, 127)
|
|
|
|
|
|
def test_multiply_black():
|
|
"""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
|
|
assert_image_equal(new, black)
|
|
|
|
|
|
def test_multiply_green():
|
|
# 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
|
|
assert new.getbbox() == (25, 25, 76, 76)
|
|
assert new.getpixel((25, 25)) == DARK_GREEN
|
|
assert new.getpixel((50, 50)) == BLACK
|
|
|
|
|
|
def test_multiply_white():
|
|
"""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
|
|
assert_image_equal(new, im1)
|
|
|
|
|
|
def test_offset():
|
|
# Arrange
|
|
xoffset = 45
|
|
yoffset = 20
|
|
with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im:
|
|
# Act
|
|
new = ImageChops.offset(im, xoffset, yoffset)
|
|
|
|
# Assert
|
|
assert new.getbbox() == (0, 45, 100, 96)
|
|
assert new.getpixel((50, 50)) == BLACK
|
|
assert new.getpixel((50 + xoffset, 50 + yoffset)) == DARK_GREEN
|
|
|
|
# Test no yoffset
|
|
assert ImageChops.offset(im, xoffset) == ImageChops.offset(im, xoffset, xoffset)
|
|
|
|
|
|
def test_screen():
|
|
# 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
|
|
assert new.getbbox() == (25, 25, 76, 76)
|
|
assert new.getpixel((50, 50)) == ORANGE
|
|
|
|
|
|
def test_subtract():
|
|
# 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
|
|
assert new.getbbox() == (25, 50, 76, 76)
|
|
assert new.getpixel((50, 51)) == GREEN
|
|
assert new.getpixel((50, 52)) == BLACK
|
|
|
|
|
|
def test_subtract_scale_offset():
|
|
# 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
|
|
assert new.getbbox() == (0, 0, 100, 100)
|
|
assert new.getpixel((50, 50)) == (100, 202, 100)
|
|
|
|
|
|
def test_subtract_clip():
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
# Act
|
|
new = ImageChops.subtract(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (0, 0, 127)
|
|
|
|
|
|
def test_subtract_modulo():
|
|
# 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
|
|
assert new.getbbox() == (25, 50, 76, 76)
|
|
assert new.getpixel((50, 51)) == GREEN
|
|
assert new.getpixel((50, 52)) == BLACK
|
|
|
|
|
|
def test_subtract_modulo_no_clip():
|
|
# Arrange
|
|
im1 = hopper()
|
|
with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
|
|
# Act
|
|
new = ImageChops.subtract_modulo(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((50, 50)) == (241, 167, 127)
|
|
|
|
|
|
def test_soft_light():
|
|
# Arrange
|
|
with Image.open("Tests/images/hopper.png") as im1:
|
|
with Image.open("Tests/images/hopper-XYZ.png") as im2:
|
|
# Act
|
|
new = ImageChops.soft_light(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((64, 64)) == (163, 54, 32)
|
|
assert new.getpixel((15, 100)) == (1, 1, 3)
|
|
|
|
|
|
def test_hard_light():
|
|
# Arrange
|
|
with Image.open("Tests/images/hopper.png") as im1:
|
|
with Image.open("Tests/images/hopper-XYZ.png") as im2:
|
|
# Act
|
|
new = ImageChops.hard_light(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((64, 64)) == (144, 50, 27)
|
|
assert new.getpixel((15, 100)) == (1, 1, 2)
|
|
|
|
|
|
def test_overlay():
|
|
# Arrange
|
|
with Image.open("Tests/images/hopper.png") as im1:
|
|
with Image.open("Tests/images/hopper-XYZ.png") as im2:
|
|
# Act
|
|
new = ImageChops.overlay(im1, im2)
|
|
|
|
# Assert
|
|
assert new.getpixel((64, 64)) == (159, 50, 27)
|
|
assert new.getpixel((15, 100)) == (1, 1, 2)
|
|
|
|
|
|
def test_logical():
|
|
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)
|
|
|
|
assert table(ImageChops.logical_and, 0, 1) == (0, 0, 0, 255)
|
|
assert table(ImageChops.logical_or, 0, 1) == (0, 255, 255, 255)
|
|
assert table(ImageChops.logical_xor, 0, 1) == (0, 255, 255, 0)
|
|
|
|
assert table(ImageChops.logical_and, 0, 128) == (0, 0, 0, 255)
|
|
assert table(ImageChops.logical_or, 0, 128) == (0, 255, 255, 255)
|
|
assert table(ImageChops.logical_xor, 0, 128) == (0, 255, 255, 0)
|
|
|
|
assert table(ImageChops.logical_and, 0, 255) == (0, 0, 0, 255)
|
|
assert table(ImageChops.logical_or, 0, 255) == (0, 255, 255, 255)
|
|
assert table(ImageChops.logical_xor, 0, 255) == (0, 255, 255, 0)
|