Pillow/Tests/test_imagedraw.py
2020-02-24 22:49:33 +11:00

1018 lines
26 KiB
Python

import os.path
import pytest
from PIL import Image, ImageColor, ImageDraw, ImageFont
from .helper import (
assert_image_equal,
assert_image_similar,
hopper,
skip_unless_feature,
)
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
GRAY = (190, 190, 190)
DEFAULT_MODE = "RGB"
IMAGES_PATH = os.path.join("Tests", "images", "imagedraw")
# Image size
W, H = 100, 100
# Bounding box points
X0 = int(W / 4)
X1 = int(X0 * 3)
Y0 = int(H / 4)
Y1 = int(X0 * 3)
# Two kinds of bounding box
BBOX1 = [(X0, Y0), (X1, Y1)]
BBOX2 = [X0, Y0, X1, Y1]
# Two kinds of coordinate sequences
POINTS1 = [(10, 10), (20, 40), (30, 30)]
POINTS2 = [10, 10, 20, 40, 30, 30]
KITE_POINTS = [(10, 50), (70, 10), (90, 50), (70, 90), (10, 50)]
def test_sanity():
im = hopper("RGB").copy()
draw = ImageDraw.ImageDraw(im)
draw = ImageDraw.Draw(im)
draw.ellipse(list(range(4)))
draw.line(list(range(10)))
draw.polygon(list(range(100)))
draw.rectangle(list(range(4)))
def test_valueerror():
with Image.open("Tests/images/chi.gif") as im:
draw = ImageDraw.Draw(im)
draw.line((0, 0), fill=(0, 0, 0))
def test_mode_mismatch():
im = hopper("RGB").copy()
with pytest.raises(ValueError):
ImageDraw.ImageDraw(im, mode="L")
def helper_arc(bbox, start, end):
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.arc(bbox, start, end)
# Assert
assert_image_similar(im, Image.open("Tests/images/imagedraw_arc.png"), 1)
def test_arc1():
helper_arc(BBOX1, 0, 180)
helper_arc(BBOX1, 0.5, 180.4)
def test_arc2():
helper_arc(BBOX2, 0, 180)
helper_arc(BBOX2, 0.5, 180.4)
def test_arc_end_le_start():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
start = 270.5
end = 0
# Act
draw.arc(BBOX1, start=start, end=end)
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_arc_end_le_start.png"))
def test_arc_no_loops():
# No need to go in loops
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
start = 5
end = 370
# Act
draw.arc(BBOX1, start=start, end=end)
# Assert
assert_image_similar(im, Image.open("Tests/images/imagedraw_arc_no_loops.png"), 1)
def test_arc_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_arc_width.png"
# Act
draw.arc(BBOX1, 10, 260, width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_arc_width_pieslice_large():
# Tests an arc with a large enough width that it is a pieslice
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_arc_width_pieslice.png"
# Act
draw.arc(BBOX1, 10, 260, fill="yellow", width=100)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_arc_width_fill():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_arc_width_fill.png"
# Act
draw.arc(BBOX1, 10, 260, fill="yellow", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_arc_width_non_whole_angle():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_arc_width_non_whole_angle.png"
# Act
draw.arc(BBOX1, 10, 259.5, width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_bitmap():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
with Image.open("Tests/images/pil123rgba.png") as small:
small = small.resize((50, 50), Image.NEAREST)
# Act
draw.bitmap((10, 10), small)
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_bitmap.png"))
def helper_chord(mode, bbox, start, end):
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_chord_{}.png".format(mode)
# Act
draw.chord(bbox, start, end, fill="red", outline="yellow")
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_chord1():
for mode in ["RGB", "L"]:
helper_chord(mode, BBOX1, 0, 180)
helper_chord(mode, BBOX1, 0.5, 180.4)
def test_chord2():
for mode in ["RGB", "L"]:
helper_chord(mode, BBOX2, 0, 180)
helper_chord(mode, BBOX2, 0.5, 180.4)
def test_chord_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_chord_width.png"
# Act
draw.chord(BBOX1, 10, 260, outline="yellow", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_chord_width_fill():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_chord_width_fill.png"
# Act
draw.chord(BBOX1, 10, 260, fill="red", outline="yellow", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_chord_zero_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.chord(BBOX1, 10, 260, fill="red", outline="yellow", width=0)
# Assert
with Image.open("Tests/images/imagedraw_chord_zero_width.png") as expected:
assert_image_equal(im, expected)
def helper_ellipse(mode, bbox):
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_ellipse_{}.png".format(mode)
# Act
draw.ellipse(bbox, fill="green", outline="blue")
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_ellipse1():
for mode in ["RGB", "L"]:
helper_ellipse(mode, BBOX1)
def test_ellipse2():
for mode in ["RGB", "L"]:
helper_ellipse(mode, BBOX2)
def test_ellipse_translucent():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im, "RGBA")
# Act
draw.ellipse(BBOX1, fill=(0, 255, 0, 127))
# Assert
expected = Image.open("Tests/images/imagedraw_ellipse_translucent.png")
assert_image_similar(im, expected, 1)
def test_ellipse_edge():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse(((0, 0), (W - 1, H)), fill="white")
# Assert
assert_image_similar(im, Image.open("Tests/images/imagedraw_ellipse_edge.png"), 1)
def test_ellipse_symmetric():
for bbox in [(25, 25, 76, 76), (25, 25, 75, 75)]:
im = Image.new("RGB", (101, 101))
draw = ImageDraw.Draw(im)
draw.ellipse(bbox, fill="green", outline="blue")
assert_image_equal(im, im.transpose(Image.FLIP_LEFT_RIGHT))
def test_ellipse_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_ellipse_width.png"
# Act
draw.ellipse(BBOX1, outline="blue", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_ellipse_width_large():
# Arrange
im = Image.new("RGB", (500, 500))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_ellipse_width_large.png"
# Act
draw.ellipse((25, 25, 475, 475), outline="blue", width=75)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_ellipse_width_fill():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_ellipse_width_fill.png"
# Act
draw.ellipse(BBOX1, fill="green", outline="blue", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_ellipse_zero_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse(BBOX1, fill="green", outline="blue", width=0)
# Assert
with Image.open("Tests/images/imagedraw_ellipse_zero_width.png") as expected:
assert_image_equal(im, expected)
def helper_line(points):
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.line(points, fill="yellow", width=2)
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_line.png"))
def test_line1():
helper_line(POINTS1)
def test_line2():
helper_line(POINTS2)
def test_shape1():
# Arrange
im = Image.new("RGB", (100, 100), "white")
draw = ImageDraw.Draw(im)
x0, y0 = 5, 5
x1, y1 = 5, 50
x2, y2 = 95, 50
x3, y3 = 95, 5
# Act
s = ImageDraw.Outline()
s.move(x0, y0)
s.curve(x1, y1, x2, y2, x3, y3)
s.line(x0, y0)
draw.shape(s, fill=1)
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_shape1.png"))
def test_shape2():
# Arrange
im = Image.new("RGB", (100, 100), "white")
draw = ImageDraw.Draw(im)
x0, y0 = 95, 95
x1, y1 = 95, 50
x2, y2 = 5, 50
x3, y3 = 5, 95
# Act
s = ImageDraw.Outline()
s.move(x0, y0)
s.curve(x1, y1, x2, y2, x3, y3)
s.line(x0, y0)
draw.shape(s, outline="blue")
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_shape2.png"))
def helper_pieslice(bbox, start, end):
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.pieslice(bbox, start, end, fill="white", outline="blue")
# Assert
assert_image_similar(im, Image.open("Tests/images/imagedraw_pieslice.png"), 1)
def test_pieslice1():
helper_pieslice(BBOX1, -90, 45)
helper_pieslice(BBOX1, -90.5, 45.4)
def test_pieslice2():
helper_pieslice(BBOX2, -90, 45)
helper_pieslice(BBOX2, -90.5, 45.4)
def test_pieslice_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_pieslice_width.png"
# Act
draw.pieslice(BBOX1, 10, 260, outline="blue", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_pieslice_width_fill():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_pieslice_width_fill.png"
# Act
draw.pieslice(BBOX1, 10, 260, fill="white", outline="blue", width=5)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_pieslice_zero_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.pieslice(BBOX1, 10, 260, fill="white", outline="blue", width=0)
# Assert
with Image.open("Tests/images/imagedraw_pieslice_zero_width.png") as expected:
assert_image_equal(im, expected)
def helper_point(points):
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.point(points, fill="yellow")
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_point.png"))
def test_point1():
helper_point(POINTS1)
def test_point2():
helper_point(POINTS2)
def helper_polygon(points):
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.polygon(points, fill="red", outline="blue")
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_polygon.png"))
def test_polygon1():
helper_polygon(POINTS1)
def test_polygon2():
helper_polygon(POINTS2)
def test_polygon_kite():
# Test drawing lines of different gradients (dx>dy, dy>dx) and
# vertical (dx==0) and horizontal (dy==0) lines
for mode in ["RGB", "L"]:
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_polygon_kite_{}.png".format(mode)
# Act
draw.polygon(KITE_POINTS, fill="blue", outline="yellow")
# Assert
assert_image_equal(im, Image.open(expected))
def helper_rectangle(bbox):
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rectangle(bbox, fill="black", outline="green")
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_rectangle.png"))
def test_rectangle1():
helper_rectangle(BBOX1)
def test_rectangle2():
helper_rectangle(BBOX2)
def test_big_rectangle():
# Test drawing a rectangle bigger than the image
# Arrange
im = Image.new("RGB", (W, H))
bbox = [(-1, -1), (W + 1, H + 1)]
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_big_rectangle.png"
# Act
draw.rectangle(bbox, fill="orange")
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_rectangle_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_rectangle_width.png"
# Act
draw.rectangle(BBOX1, outline="green", width=5)
# Assert
assert_image_equal(im, Image.open(expected))
def test_rectangle_width_fill():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_rectangle_width_fill.png"
# Act
draw.rectangle(BBOX1, fill="blue", outline="green", width=5)
# Assert
assert_image_equal(im, Image.open(expected))
def test_rectangle_zero_width():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rectangle(BBOX1, fill="blue", outline="green", width=0)
# Assert
with Image.open("Tests/images/imagedraw_rectangle_zero_width.png") as expected:
assert_image_equal(im, expected)
def test_rectangle_I16():
# Arrange
im = Image.new("I;16", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rectangle(BBOX1, fill="black", outline="green")
# Assert
assert_image_equal(
im.convert("I"), Image.open("Tests/images/imagedraw_rectangle_I.png")
)
def test_floodfill():
red = ImageColor.getrgb("red")
for mode, value in [("L", 1), ("RGBA", (255, 0, 0, 0)), ("RGB", red)]:
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
draw.rectangle(BBOX2, outline="yellow", fill="green")
centre_point = (int(W / 2), int(H / 2))
# Act
ImageDraw.floodfill(im, centre_point, value)
# Assert
expected = "Tests/images/imagedraw_floodfill_" + mode + ".png"
with Image.open(expected) as im_floodfill:
assert_image_equal(im, im_floodfill)
# Test that using the same colour does not change the image
ImageDraw.floodfill(im, centre_point, red)
assert_image_equal(im, im_floodfill)
# Test that filling outside the image does not change the image
ImageDraw.floodfill(im, (W, H), red)
assert_image_equal(im, im_floodfill)
# Test filling at the edge of an image
im = Image.new("RGB", (1, 1))
ImageDraw.floodfill(im, (0, 0), red)
assert_image_equal(im, Image.new("RGB", (1, 1), red))
def test_floodfill_border():
# floodfill() is experimental
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
draw.rectangle(BBOX2, outline="yellow", fill="green")
centre_point = (int(W / 2), int(H / 2))
# Act
ImageDraw.floodfill(
im, centre_point, ImageColor.getrgb("red"), border=ImageColor.getrgb("black"),
)
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_floodfill2.png"))
def test_floodfill_thresh():
# floodfill() is experimental
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
draw.rectangle(BBOX2, outline="darkgreen", fill="green")
centre_point = (int(W / 2), int(H / 2))
# Act
ImageDraw.floodfill(im, centre_point, ImageColor.getrgb("red"), thresh=30)
# Assert
assert_image_equal(im, Image.open("Tests/images/imagedraw_floodfill2.png"))
def test_floodfill_not_negative():
# floodfill() is experimental
# Test that floodfill does not extend into negative coordinates
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
draw.line((W / 2, 0, W / 2, H / 2), fill="green")
draw.line((0, H / 2, W / 2, H / 2), fill="green")
# Act
ImageDraw.floodfill(im, (int(W / 4), int(H / 4)), ImageColor.getrgb("red"))
# Assert
assert_image_equal(
im, Image.open("Tests/images/imagedraw_floodfill_not_negative.png")
)
def create_base_image_draw(
size, mode=DEFAULT_MODE, background1=WHITE, background2=GRAY
):
img = Image.new(mode, size, background1)
for x in range(0, size[0]):
for y in range(0, size[1]):
if (x + y) % 2 == 0:
img.putpixel((x, y), background2)
return img, ImageDraw.Draw(img)
def test_square():
with Image.open(os.path.join(IMAGES_PATH, "square.png")) as expected:
expected.load()
img, draw = create_base_image_draw((10, 10))
draw.polygon([(2, 2), (2, 7), (7, 7), (7, 2)], BLACK)
assert_image_equal(img, expected, "square as normal polygon failed")
img, draw = create_base_image_draw((10, 10))
draw.polygon([(7, 7), (7, 2), (2, 2), (2, 7)], BLACK)
assert_image_equal(img, expected, "square as inverted polygon failed")
img, draw = create_base_image_draw((10, 10))
draw.rectangle((2, 2, 7, 7), BLACK)
assert_image_equal(img, expected, "square as normal rectangle failed")
img, draw = create_base_image_draw((10, 10))
draw.rectangle((7, 7, 2, 2), BLACK)
assert_image_equal(img, expected, "square as inverted rectangle failed")
def test_triangle_right():
with Image.open(os.path.join(IMAGES_PATH, "triangle_right.png")) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.polygon([(3, 5), (17, 5), (10, 12)], BLACK)
assert_image_equal(img, expected, "triangle right failed")
def test_line_horizontal():
with Image.open(
os.path.join(IMAGES_PATH, "line_horizontal_w2px_normal.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 5), BLACK, 2)
assert_image_equal(
img, expected, "line straight horizontal normal 2px wide failed"
)
with Image.open(
os.path.join(IMAGES_PATH, "line_horizontal_w2px_inverted.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((14, 5, 5, 5), BLACK, 2)
assert_image_equal(
img, expected, "line straight horizontal inverted 2px wide failed"
)
with Image.open(os.path.join(IMAGES_PATH, "line_horizontal_w3px.png")) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 5), BLACK, 3)
assert_image_equal(
img, expected, "line straight horizontal normal 3px wide failed"
)
img, draw = create_base_image_draw((20, 20))
draw.line((14, 5, 5, 5), BLACK, 3)
assert_image_equal(
img, expected, "line straight horizontal inverted 3px wide failed"
)
with Image.open(
os.path.join(IMAGES_PATH, "line_horizontal_w101px.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((200, 110))
draw.line((5, 55, 195, 55), BLACK, 101)
assert_image_equal(img, expected, "line straight horizontal 101px wide failed")
def test_line_h_s1_w2():
pytest.skip("failing")
with Image.open(
os.path.join(IMAGES_PATH, "line_horizontal_slope1px_w2px.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 6), BLACK, 2)
assert_image_equal(img, expected, "line horizontal 1px slope 2px wide failed")
def test_line_vertical():
with Image.open(
os.path.join(IMAGES_PATH, "line_vertical_w2px_normal.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 5, 14), BLACK, 2)
assert_image_equal(
img, expected, "line straight vertical normal 2px wide failed"
)
with Image.open(
os.path.join(IMAGES_PATH, "line_vertical_w2px_inverted.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 14, 5, 5), BLACK, 2)
assert_image_equal(
img, expected, "line straight vertical inverted 2px wide failed"
)
with Image.open(os.path.join(IMAGES_PATH, "line_vertical_w3px.png")) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 5, 14), BLACK, 3)
assert_image_equal(
img, expected, "line straight vertical normal 3px wide failed"
)
img, draw = create_base_image_draw((20, 20))
draw.line((5, 14, 5, 5), BLACK, 3)
assert_image_equal(
img, expected, "line straight vertical inverted 3px wide failed"
)
with Image.open(os.path.join(IMAGES_PATH, "line_vertical_w101px.png")) as expected:
expected.load()
img, draw = create_base_image_draw((110, 200))
draw.line((55, 5, 55, 195), BLACK, 101)
assert_image_equal(img, expected, "line straight vertical 101px wide failed")
with Image.open(
os.path.join(IMAGES_PATH, "line_vertical_slope1px_w2px.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 6, 14), BLACK, 2)
assert_image_equal(img, expected, "line vertical 1px slope 2px wide failed")
def test_line_oblique_45():
with Image.open(
os.path.join(IMAGES_PATH, "line_oblique_45_w3px_a.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 14), BLACK, 3)
assert_image_equal(img, expected, "line oblique 45 normal 3px wide A failed")
img, draw = create_base_image_draw((20, 20))
draw.line((14, 14, 5, 5), BLACK, 3)
assert_image_equal(img, expected, "line oblique 45 inverted 3px wide A failed")
with Image.open(
os.path.join(IMAGES_PATH, "line_oblique_45_w3px_b.png")
) as expected:
expected.load()
img, draw = create_base_image_draw((20, 20))
draw.line((14, 5, 5, 14), BLACK, 3)
assert_image_equal(img, expected, "line oblique 45 normal 3px wide B failed")
img, draw = create_base_image_draw((20, 20))
draw.line((5, 14, 14, 5), BLACK, 3)
assert_image_equal(img, expected, "line oblique 45 inverted 3px wide B failed")
def test_wide_line_dot():
# Test drawing a wide "line" from one point to another just draws a single point
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_wide_line_dot.png"
# Act
draw.line([(50, 50), (50, 50)], width=3)
# Assert
assert_image_similar(im, Image.open(expected), 1)
def test_line_joint():
im = Image.new("RGB", (500, 325))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_line_joint_curve.png"
# Act
xy = [
(400, 280),
(380, 280),
(450, 280),
(440, 120),
(350, 200),
(310, 280),
(300, 280),
(250, 280),
(250, 200),
(150, 200),
(150, 260),
(50, 200),
(150, 50),
(250, 100),
]
draw.line(xy, GRAY, 50, "curve")
# Assert
assert_image_similar(im, Image.open(expected), 3)
def test_textsize_empty_string():
# https://github.com/python-pillow/Pillow/issues/2783
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
# Should not cause 'SystemError: <built-in method getsize of
# ImagingFont object at 0x...> returned NULL without setting an error'
draw.textsize("")
draw.textsize("\n")
draw.textsize("test\n")
@skip_unless_feature("freetype2")
def test_textsize_stroke():
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 20)
# Act / Assert
assert draw.textsize("A", font, stroke_width=2) == (16, 20)
assert draw.multiline_textsize("ABC\nAaaa", font, stroke_width=2) == (52, 44)
@skip_unless_feature("freetype2")
def test_stroke():
for suffix, stroke_fill in {"same": None, "different": "#0f0"}.items():
# Arrange
im = Image.new("RGB", (120, 130))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 120)
# Act
draw.text((10, 10), "A", "#f00", font, stroke_width=2, stroke_fill=stroke_fill)
# Assert
assert_image_similar(
im, Image.open("Tests/images/imagedraw_stroke_" + suffix + ".png"), 3.1
)
@skip_unless_feature("freetype2")
def test_stroke_descender():
# Arrange
im = Image.new("RGB", (120, 130))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 120)
# Act
draw.text((10, 0), "y", "#f00", font, stroke_width=2, stroke_fill="#0f0")
# Assert
assert_image_similar(
im, Image.open("Tests/images/imagedraw_stroke_descender.png"), 6.76
)
@skip_unless_feature("freetype2")
def test_stroke_multiline():
# Arrange
im = Image.new("RGB", (100, 250))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 120)
# Act
draw.multiline_text(
(10, 10), "A\nB", "#f00", font, stroke_width=2, stroke_fill="#0f0"
)
# Assert
assert_image_similar(
im, Image.open("Tests/images/imagedraw_stroke_multiline.png"), 3.3
)
def test_same_color_outline():
# Prepare shape
x0, y0 = 5, 5
x1, y1 = 5, 50
x2, y2 = 95, 50
x3, y3 = 95, 5
s = ImageDraw.Outline()
s.move(x0, y0)
s.curve(x1, y1, x2, y2, x3, y3)
s.line(x0, y0)
# Begin
for mode in ["RGB", "L"]:
for fill, outline in [["red", None], ["red", "red"], ["red", "#f00"]]:
for operation, args in {
"chord": [BBOX1, 0, 180],
"ellipse": [BBOX1],
"shape": [s],
"pieslice": [BBOX1, -90, 45],
"polygon": [[(18, 30), (85, 30), (60, 72)]],
"rectangle": [BBOX1],
}.items():
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
# Act
draw_method = getattr(draw, operation)
args += [fill, outline]
draw_method(*args)
# Assert
expected = "Tests/images/imagedraw_outline_{}_{}.png".format(
operation, mode
)
assert_image_similar(im, Image.open(expected), 1)