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Pillow/Tests/test_imagedraw.py
Jon Dufresne 4f185329f4 Streamline test skipping based on supported features 
This adds a new test decorator: skip_unless_feature(). The argument is
the same as passed to features.check(). If the feature is not supported,
the test will be skipped.

This removes several kinds of boilerplate copied and pasted around tests
so test feature checking is handled and displayed more consistently.

Refs #4193
2020-02-18 13:07:01 -08:00

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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_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)
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