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408 lines
10 KiB
Python
408 lines
10 KiB
Python
from PIL import Image, ImageChops
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from .helper import assert_image_equal, hopper
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BLACK = (0, 0, 0)
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BROWN = (127, 64, 0)
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CYAN = (0, 255, 255)
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DARK_GREEN = (0, 128, 0)
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GREEN = (0, 255, 0)
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ORANGE = (255, 128, 0)
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WHITE = (255, 255, 255)
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GRAY = 128
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def test_sanity():
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im = hopper("L")
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ImageChops.constant(im, 128)
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ImageChops.duplicate(im)
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ImageChops.invert(im)
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ImageChops.lighter(im, im)
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ImageChops.darker(im, im)
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ImageChops.difference(im, im)
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ImageChops.multiply(im, im)
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ImageChops.screen(im, im)
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ImageChops.add(im, im)
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ImageChops.add(im, im, 2.0)
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ImageChops.add(im, im, 2.0, 128)
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ImageChops.subtract(im, im)
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ImageChops.subtract(im, im, 2.0)
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ImageChops.subtract(im, im, 2.0, 128)
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ImageChops.add_modulo(im, im)
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ImageChops.subtract_modulo(im, im)
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ImageChops.blend(im, im, 0.5)
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ImageChops.composite(im, im, im)
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ImageChops.soft_light(im, im)
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ImageChops.hard_light(im, im)
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ImageChops.overlay(im, im)
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ImageChops.offset(im, 10)
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ImageChops.offset(im, 10, 20)
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def test_add():
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# Arrange
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with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
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# Act
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new = ImageChops.add(im1, im2)
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# Assert
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assert new.getbbox() == (25, 25, 76, 76)
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assert new.getpixel((50, 50)) == ORANGE
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def test_add_scale_offset():
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# Arrange
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with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
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# Act
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new = ImageChops.add(im1, im2, scale=2.5, offset=100)
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# Assert
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assert new.getbbox() == (0, 0, 100, 100)
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assert new.getpixel((50, 50)) == (202, 151, 100)
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def test_add_clip():
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# Arrange
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im = hopper()
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# Act
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new = ImageChops.add(im, im)
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# Assert
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assert new.getpixel((50, 50)) == (255, 255, 254)
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def test_add_modulo():
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# Arrange
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with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
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# Act
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new = ImageChops.add_modulo(im1, im2)
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# Assert
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assert new.getbbox() == (25, 25, 76, 76)
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assert new.getpixel((50, 50)) == ORANGE
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def test_add_modulo_no_clip():
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# Arrange
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im = hopper()
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# Act
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new = ImageChops.add_modulo(im, im)
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# Assert
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assert new.getpixel((50, 50)) == (224, 76, 254)
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def test_blend():
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# Arrange
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with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
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# Act
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new = ImageChops.blend(im1, im2, 0.5)
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# Assert
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assert new.getbbox() == (25, 25, 76, 76)
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assert new.getpixel((50, 50)) == BROWN
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def test_constant():
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# Arrange
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im = Image.new("RGB", (20, 10))
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# Act
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new = ImageChops.constant(im, GRAY)
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# Assert
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assert new.size == im.size
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assert new.getpixel((0, 0)) == GRAY
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assert new.getpixel((19, 9)) == GRAY
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def test_darker_image():
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# Arrange
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
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# Act
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new = ImageChops.darker(im1, im2)
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# Assert
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assert_image_equal(new, im2)
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def test_darker_pixel():
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# Arrange
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im1 = hopper()
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
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# Act
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new = ImageChops.darker(im1, im2)
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# Assert
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assert new.getpixel((50, 50)) == (240, 166, 0)
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def test_difference():
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# Arrange
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with Image.open("Tests/images/imagedraw_arc_end_le_start.png") as im1:
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with Image.open("Tests/images/imagedraw_arc_no_loops.png") as im2:
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# Act
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new = ImageChops.difference(im1, im2)
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# Assert
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assert new.getbbox() == (25, 25, 76, 76)
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def test_difference_pixel():
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# Arrange
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im1 = hopper()
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with Image.open("Tests/images/imagedraw_polygon_kite_RGB.png") as im2:
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# Act
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new = ImageChops.difference(im1, im2)
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# Assert
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assert new.getpixel((50, 50)) == (240, 166, 128)
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def test_duplicate():
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# Arrange
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im = hopper()
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# Act
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new = ImageChops.duplicate(im)
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# Assert
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assert_image_equal(new, im)
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def test_invert():
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# Arrange
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im:
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# Act
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new = ImageChops.invert(im)
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# Assert
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assert new.getbbox() == (0, 0, 100, 100)
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assert new.getpixel((0, 0)) == WHITE
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assert new.getpixel((50, 50)) == CYAN
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def test_lighter_image():
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# Arrange
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
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# Act
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new = ImageChops.lighter(im1, im2)
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# Assert
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assert_image_equal(new, im1)
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def test_lighter_pixel():
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# Arrange
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im1 = hopper()
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
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# Act
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new = ImageChops.lighter(im1, im2)
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# Assert
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assert new.getpixel((50, 50)) == (255, 255, 127)
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def test_multiply_black():
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"""If you multiply an image with a solid black image,
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the result is black."""
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# Arrange
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im1 = hopper()
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black = Image.new("RGB", im1.size, "black")
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# Act
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new = ImageChops.multiply(im1, black)
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# Assert
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assert_image_equal(new, black)
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def test_multiply_green():
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# Arrange
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im:
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green = Image.new("RGB", im.size, "green")
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# Act
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new = ImageChops.multiply(im, green)
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# Assert
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assert new.getbbox() == (25, 25, 76, 76)
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assert new.getpixel((25, 25)) == DARK_GREEN
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assert new.getpixel((50, 50)) == BLACK
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def test_multiply_white():
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"""If you multiply with a solid white image, the image is unaffected."""
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# Arrange
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im1 = hopper()
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white = Image.new("RGB", im1.size, "white")
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# Act
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new = ImageChops.multiply(im1, white)
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# Assert
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assert_image_equal(new, im1)
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def test_offset():
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# Arrange
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xoffset = 45
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yoffset = 20
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with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im:
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# Act
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new = ImageChops.offset(im, xoffset, yoffset)
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# Assert
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assert new.getbbox() == (0, 45, 100, 96)
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assert new.getpixel((50, 50)) == BLACK
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assert new.getpixel((50 + xoffset, 50 + yoffset)) == DARK_GREEN
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# Test no yoffset
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assert ImageChops.offset(im, xoffset) == ImageChops.offset(im, xoffset, xoffset)
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def test_screen():
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# Arrange
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with Image.open("Tests/images/imagedraw_ellipse_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_floodfill_RGB.png") as im2:
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# Act
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new = ImageChops.screen(im1, im2)
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# Assert
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assert new.getbbox() == (25, 25, 76, 76)
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assert new.getpixel((50, 50)) == ORANGE
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def test_subtract():
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# Arrange
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
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# Act
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new = ImageChops.subtract(im1, im2)
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# Assert
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assert new.getbbox() == (25, 50, 76, 76)
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assert new.getpixel((50, 51)) == GREEN
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assert new.getpixel((50, 52)) == BLACK
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def test_subtract_scale_offset():
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# Arrange
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
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# Act
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new = ImageChops.subtract(im1, im2, scale=2.5, offset=100)
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# Assert
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assert new.getbbox() == (0, 0, 100, 100)
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assert new.getpixel((50, 50)) == (100, 202, 100)
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def test_subtract_clip():
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# Arrange
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im1 = hopper()
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
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# Act
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new = ImageChops.subtract(im1, im2)
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# Assert
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assert new.getpixel((50, 50)) == (0, 0, 127)
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def test_subtract_modulo():
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# Arrange
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im1:
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with Image.open("Tests/images/imagedraw_outline_chord_RGB.png") as im2:
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# Act
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new = ImageChops.subtract_modulo(im1, im2)
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# Assert
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assert new.getbbox() == (25, 50, 76, 76)
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assert new.getpixel((50, 51)) == GREEN
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assert new.getpixel((50, 52)) == BLACK
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def test_subtract_modulo_no_clip():
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# Arrange
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im1 = hopper()
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with Image.open("Tests/images/imagedraw_chord_RGB.png") as im2:
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# Act
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new = ImageChops.subtract_modulo(im1, im2)
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# Assert
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assert new.getpixel((50, 50)) == (241, 167, 127)
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def test_soft_light():
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# Arrange
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with Image.open("Tests/images/hopper.png") as im1:
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with Image.open("Tests/images/hopper-XYZ.png") as im2:
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# Act
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new = ImageChops.soft_light(im1, im2)
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# Assert
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assert new.getpixel((64, 64)) == (163, 54, 32)
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assert new.getpixel((15, 100)) == (1, 1, 3)
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def test_hard_light():
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# Arrange
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with Image.open("Tests/images/hopper.png") as im1:
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with Image.open("Tests/images/hopper-XYZ.png") as im2:
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# Act
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new = ImageChops.hard_light(im1, im2)
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# Assert
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assert new.getpixel((64, 64)) == (144, 50, 27)
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assert new.getpixel((15, 100)) == (1, 1, 2)
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def test_overlay():
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# Arrange
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with Image.open("Tests/images/hopper.png") as im1:
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with Image.open("Tests/images/hopper-XYZ.png") as im2:
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# Act
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new = ImageChops.overlay(im1, im2)
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# Assert
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assert new.getpixel((64, 64)) == (159, 50, 27)
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assert new.getpixel((15, 100)) == (1, 1, 2)
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def test_logical():
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def table(op, a, b):
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out = []
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for x in (a, b):
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imx = Image.new("1", (1, 1), x)
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for y in (a, b):
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imy = Image.new("1", (1, 1), y)
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out.append(op(imx, imy).getpixel((0, 0)))
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return tuple(out)
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assert table(ImageChops.logical_and, 0, 1) == (0, 0, 0, 255)
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assert table(ImageChops.logical_or, 0, 1) == (0, 255, 255, 255)
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assert table(ImageChops.logical_xor, 0, 1) == (0, 255, 255, 0)
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assert table(ImageChops.logical_and, 0, 128) == (0, 0, 0, 255)
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assert table(ImageChops.logical_or, 0, 128) == (0, 255, 255, 255)
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assert table(ImageChops.logical_xor, 0, 128) == (0, 255, 255, 0)
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assert table(ImageChops.logical_and, 0, 255) == (0, 0, 0, 255)
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assert table(ImageChops.logical_or, 0, 255) == (0, 255, 255, 255)
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assert table(ImageChops.logical_xor, 0, 255) == (0, 255, 255, 0)
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