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Pillow/Tests/test_imagedraw.py

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from __future__ import annotations
import contextlib
import os.path
import pytest
from PIL import Image, ImageColor, ImageDraw, ImageFont, features
from PIL._typing import Coords
from .helper import (
assert_image_equal,
assert_image_equal_tofile,
assert_image_similar_tofile,
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)
# Bounding boxes
BBOX = (((X0, Y0), (X1, Y1)), [(X0, Y0), (X1, Y1)], (X0, Y0, X1, Y1), [X0, Y0, X1, Y1])
# Coordinate sequences
POINTS = (
((10, 10), (20, 40), (30, 30)),
[(10, 10), (20, 40), (30, 30)],
(10, 10, 20, 40, 30, 30),
[10, 10, 20, 40, 30, 30],
)
KITE_POINTS = (
((10, 50), (70, 10), (90, 50), (70, 90), (10, 50)),
[(10, 50), (70, 10), (90, 50), (70, 90), (10, 50)],
)
def test_sanity() -> None:
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() -> None:
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() -> None:
im = hopper("RGB").copy()
with pytest.raises(ValueError):
ImageDraw.ImageDraw(im, mode="L")
@pytest.mark.parametrize("bbox", BBOX)
@pytest.mark.parametrize("start, end", ((0, 180), (0.5, 180.4)))
def test_arc(bbox: Coords, start: float, end: float) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.arc(bbox, start, end)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_arc.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_arc_end_le_start(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
start = 270.5
end = 0
# Act
draw.arc(bbox, start=start, end=end)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_arc_end_le_start.png")
@pytest.mark.parametrize("bbox", BBOX)
def test_arc_no_loops(bbox: Coords) -> None:
# No need to go in loops
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
start = 5
end = 370
# Act
draw.arc(bbox, start=start, end=end)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_arc_no_loops.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_arc_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.arc(bbox, 10, 260, width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_arc_width.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_arc_width_pieslice_large(bbox: Coords) -> None:
# Tests an arc with a large enough width that it is a pieslice
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.arc(bbox, 10, 260, fill="yellow", width=100)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_arc_width_pieslice.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_arc_width_fill(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.arc(bbox, 10, 260, fill="yellow", width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_arc_width_fill.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_arc_width_non_whole_angle(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_arc_width_non_whole_angle.png"
# Act
draw.arc(bbox, 10, 259.5, width=5)
# Assert
assert_image_similar_tofile(im, expected, 1)
def test_arc_high() -> None:
# Arrange
im = Image.new("RGB", (200, 200))
draw = ImageDraw.Draw(im)
# Act
draw.arc([10, 10, 89, 189], 20, 330, width=20, fill="white")
draw.arc([110, 10, 189, 189], 20, 150, width=20, fill="white")
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_arc_high.png")
def test_bitmap() -> None:
# 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.Resampling.NEAREST)
# Act
draw.bitmap((10, 10), small)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_bitmap.png")
@pytest.mark.parametrize("mode", ("RGB", "L"))
@pytest.mark.parametrize("bbox", BBOX)
def test_chord(mode: str, bbox: Coords) -> None:
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
expected = f"Tests/images/imagedraw_chord_{mode}.png"
# Act
draw.chord(bbox, 0, 180, fill="red", outline="yellow")
# Assert
assert_image_similar_tofile(im, expected, 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_chord_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.chord(bbox, 10, 260, outline="yellow", width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_chord_width.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_chord_width_fill(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.chord(bbox, 10, 260, fill="red", outline="yellow", width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_chord_width_fill.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_chord_zero_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.chord(bbox, 10, 260, fill="red", outline="yellow", width=0)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_chord_zero_width.png")
def test_chord_too_fat() -> None:
# Arrange
im = Image.new("RGB", (100, 100))
draw = ImageDraw.Draw(im)
# Act
draw.chord([-150, -150, 99, 99], 15, 60, width=10, fill="white", outline="red")
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_chord_too_fat.png")
@pytest.mark.parametrize("mode", ("RGB", "L"))
@pytest.mark.parametrize("bbox", BBOX)
def test_ellipse(mode: str, bbox: Coords) -> None:
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
expected = f"Tests/images/imagedraw_ellipse_{mode}.png"
# Act
draw.ellipse(bbox, fill="green", outline="blue")
# Assert
assert_image_similar_tofile(im, expected, 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_ellipse_translucent(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im, "RGBA")
# Act
draw.ellipse(bbox, fill=(0, 255, 0, 127))
# Assert
expected = "Tests/images/imagedraw_ellipse_translucent.png"
assert_image_similar_tofile(im, expected, 1)
def test_ellipse_edge() -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse(((0, 0), (W - 1, H - 1)), fill="white")
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_ellipse_edge.png", 1)
def test_ellipse_symmetric() -> None:
for width, bbox in (
(100, (24, 24, 75, 75)),
(101, (25, 25, 75, 75)),
):
im = Image.new("RGB", (width, 100))
draw = ImageDraw.Draw(im)
draw.ellipse(bbox, fill="green", outline="blue")
assert_image_equal(im, im.transpose(Image.Transpose.FLIP_LEFT_RIGHT))
@pytest.mark.parametrize("bbox", BBOX)
def test_ellipse_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse(bbox, outline="blue", width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_ellipse_width.png", 1)
def test_ellipse_width_large() -> None:
# Arrange
im = Image.new("RGB", (500, 500))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse((25, 25, 475, 475), outline="blue", width=75)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_ellipse_width_large.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_ellipse_width_fill(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse(bbox, fill="green", outline="blue", width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_ellipse_width_fill.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_ellipse_zero_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.ellipse(bbox, fill="green", outline="blue", width=0)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_ellipse_zero_width.png")
def ellipse_various_sizes_helper(filled: bool) -> Image.Image:
ellipse_sizes = range(32)
image_size = sum(ellipse_sizes) + len(ellipse_sizes) + 1
im = Image.new("RGB", (image_size, image_size))
draw = ImageDraw.Draw(im)
x = 1
for w in ellipse_sizes:
y = 1
for h in ellipse_sizes:
x1 = x + w
if w:
x1 -= 1
y1 = y + h
if h:
y1 -= 1
border = [x, y, x1, y1]
if filled:
draw.ellipse(border, fill="white")
else:
draw.ellipse(border, outline="white")
y += h + 1
x += w + 1
return im
def test_ellipse_various_sizes() -> None:
im = ellipse_various_sizes_helper(False)
assert_image_equal_tofile(im, "Tests/images/imagedraw_ellipse_various_sizes.png")
def test_ellipse_various_sizes_filled() -> None:
im = ellipse_various_sizes_helper(True)
assert_image_equal_tofile(
im, "Tests/images/imagedraw_ellipse_various_sizes_filled.png"
)
@pytest.mark.parametrize("points", POINTS)
def test_line(points: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.line(points, fill="yellow", width=2)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_line.png")
def test_shape1() -> None:
# 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_tofile(im, "Tests/images/imagedraw_shape1.png")
def test_shape2() -> None:
# 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_tofile(im, "Tests/images/imagedraw_shape2.png")
def test_transform() -> None:
# Arrange
im = Image.new("RGB", (100, 100), "white")
expected = im.copy()
draw = ImageDraw.Draw(im)
# Act
s = ImageDraw.Outline()
s.line(0, 0)
s.transform((0, 0, 0, 0, 0, 0))
draw.shape(s, fill=1)
# Assert
assert_image_equal(im, expected)
@pytest.mark.parametrize("bbox", BBOX)
@pytest.mark.parametrize("start, end", ((-92, 46), (-92.2, 46.2)))
def test_pieslice(bbox: Coords, start: float, end: float) -> None:
# 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_tofile(im, "Tests/images/imagedraw_pieslice.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_pieslice_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.pieslice(bbox, 10, 260, outline="blue", width=5)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_pieslice_width.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_pieslice_width_fill(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_pieslice_width_fill.png"
# Act
draw.pieslice(bbox, 10, 260, fill="white", outline="blue", width=5)
# Assert
assert_image_similar_tofile(im, expected, 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_pieslice_zero_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.pieslice(bbox, 10, 260, fill="white", outline="blue", width=0)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_pieslice_zero_width.png")
def test_pieslice_wide() -> None:
# Arrange
im = Image.new("RGB", (200, 100))
draw = ImageDraw.Draw(im)
# Act
draw.pieslice([0, 0, 199, 99], 190, 170, width=10, fill="white", outline="red")
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_pieslice_wide.png")
def test_pieslice_no_spikes() -> None:
im = Image.new("RGB", (161, 161), "white")
draw = ImageDraw.Draw(im)
cxs = (
[140] * 3
+ list(range(140, 19, -20))
+ [20] * 5
+ list(range(20, 141, 20))
+ [140] * 2
)
cys = (
list(range(80, 141, 20))
+ [140] * 5
+ list(range(140, 19, -20))
+ [20] * 5
+ list(range(20, 80, 20))
)
for cx, cy, angle in zip(cxs, cys, range(0, 360, 15)):
draw.pieslice(
[cx - 100, cy - 100, cx + 100, cy + 100], angle, angle + 1, fill="black"
)
draw.point([cx, cy], fill="red")
im_pre_erase = im.copy()
draw.rectangle([21, 21, 139, 139], fill="white")
assert_image_equal(im, im_pre_erase)
@pytest.mark.parametrize("points", POINTS)
def test_point(points: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.point(points, fill="yellow")
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_point.png")
def test_point_I16() -> None:
# Arrange
im = Image.new("I;16", (1, 1))
draw = ImageDraw.Draw(im)
# Act
draw.point((0, 0), fill=0x1234)
# Assert
assert im.getpixel((0, 0)) == 0x1234
@pytest.mark.parametrize("points", POINTS)
def test_polygon(points: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.polygon(points, fill="red", outline="blue")
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_polygon.png")
@pytest.mark.parametrize("mode", ("RGB", "L"))
@pytest.mark.parametrize("kite_points", KITE_POINTS)
def test_polygon_kite(
mode: str, kite_points: tuple[tuple[int, int], ...] | list[tuple[int, int]]
) -> None:
# Test drawing lines of different gradients (dx>dy, dy>dx) and
# vertical (dx==0) and horizontal (dy==0) lines
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
expected = f"Tests/images/imagedraw_polygon_kite_{mode}.png"
# Act
draw.polygon(kite_points, fill="blue", outline="yellow")
# Assert
assert_image_equal_tofile(im, expected)
def test_polygon_1px_high() -> None:
# Test drawing a 1px high polygon
# Arrange
im = Image.new("RGB", (3, 3))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_polygon_1px_high.png"
# Act
draw.polygon([(0, 1), (0, 1), (2, 1), (2, 1)], "#f00")
# Assert
assert_image_equal_tofile(im, expected)
def test_polygon_1px_high_translucent() -> None:
# Test drawing a translucent 1px high polygon
# Arrange
im = Image.new("RGB", (4, 3))
draw = ImageDraw.Draw(im, "RGBA")
expected = "Tests/images/imagedraw_polygon_1px_high_translucent.png"
# Act
draw.polygon([(1, 1), (1, 1), (3, 1), (3, 1)], (255, 0, 0, 127))
# Assert
assert_image_equal_tofile(im, expected)
def test_polygon_translucent() -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im, "RGBA")
# Act
draw.polygon([(20, 80), (80, 80), (80, 20)], fill=(0, 255, 0, 127))
# Assert
expected = "Tests/images/imagedraw_polygon_translucent.png"
assert_image_equal_tofile(im, expected)
@pytest.mark.parametrize("bbox", BBOX)
def test_rectangle(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rectangle(bbox, fill="black", outline="green")
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_rectangle.png")
def test_big_rectangle() -> None:
# 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)
# Act
draw.rectangle(bbox, fill="orange")
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_big_rectangle.png", 1)
@pytest.mark.parametrize("bbox", BBOX)
def test_rectangle_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_rectangle_width.png"
# Act
draw.rectangle(bbox, outline="green", width=5)
# Assert
assert_image_equal_tofile(im, expected)
@pytest.mark.parametrize("bbox", BBOX)
def test_rectangle_width_fill(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_rectangle_width_fill.png"
# Act
draw.rectangle(bbox, fill="blue", outline="green", width=5)
# Assert
assert_image_equal_tofile(im, expected)
@pytest.mark.parametrize("bbox", BBOX)
def test_rectangle_zero_width(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rectangle(bbox, fill="blue", outline="green", width=0)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_rectangle_zero_width.png")
@pytest.mark.parametrize("bbox", BBOX)
def test_rectangle_I16(bbox: Coords) -> None:
# Arrange
im = Image.new("I;16", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rectangle(bbox, outline=0xFFFF)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_rectangle_I.tiff")
@pytest.mark.parametrize("bbox", BBOX)
def test_rectangle_translucent_outline(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im, "RGBA")
# Act
draw.rectangle(bbox, fill="black", outline=(0, 255, 0, 127), width=5)
# Assert
assert_image_equal_tofile(
im, "Tests/images/imagedraw_rectangle_translucent_outline.png"
)
@pytest.mark.parametrize(
"xy",
[(10, 20, 190, 180), ([10, 20], [190, 180]), ((10, 20), (190, 180))],
)
def test_rounded_rectangle(
xy: (
tuple[int, int, int, int]
| tuple[list[int]]
| tuple[tuple[int, int], tuple[int, int]]
)
) -> None:
# Arrange
im = Image.new("RGB", (200, 200))
draw = ImageDraw.Draw(im)
# Act
draw.rounded_rectangle(xy, 30, fill="red", outline="green", width=5)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_rounded_rectangle.png")
@pytest.mark.parametrize("top_left", (True, False))
@pytest.mark.parametrize("top_right", (True, False))
@pytest.mark.parametrize("bottom_right", (True, False))
@pytest.mark.parametrize("bottom_left", (True, False))
def test_rounded_rectangle_corners(
top_left: bool, top_right: bool, bottom_right: bool, bottom_left: bool
) -> None:
corners = (top_left, top_right, bottom_right, bottom_left)
# Arrange
im = Image.new("RGB", (200, 200))
draw = ImageDraw.Draw(im)
# Act
draw.rounded_rectangle(
(10, 20, 190, 180), 30, fill="red", outline="green", width=5, corners=corners
)
# Assert
suffix = "".join(
(
("y" if top_left else "n"),
("y" if top_right else "n"),
("y" if bottom_right else "n"),
("y" if bottom_left else "n"),
)
)
assert_image_equal_tofile(
im, "Tests/images/imagedraw_rounded_rectangle_corners_" + suffix + ".png"
)
@pytest.mark.parametrize(
"xy, radius, type",
[
((10, 20, 190, 180), 30.5, "given"),
((10, 10, 181, 190), 90, "width"),
((10, 20, 190, 181), 85, "height"),
],
)
def test_rounded_rectangle_non_integer_radius(
xy: tuple[int, int, int, int], radius: float, type: str
) -> None:
# Arrange
im = Image.new("RGB", (200, 200))
draw = ImageDraw.Draw(im)
# Act
draw.rounded_rectangle(xy, radius, fill="red", outline="green", width=5)
# Assert
assert_image_equal_tofile(
im,
"Tests/images/imagedraw_rounded_rectangle_non_integer_radius_" + type + ".png",
)
@pytest.mark.parametrize("bbox", BBOX)
def test_rounded_rectangle_zero_radius(bbox: Coords) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
# Act
draw.rounded_rectangle(bbox, 0, fill="blue", outline="green", width=5)
# Assert
assert_image_equal_tofile(im, "Tests/images/imagedraw_rectangle_width_fill.png")
@pytest.mark.parametrize(
"xy, suffix",
[
((20, 10, 80, 90), "x"),
((20, 10, 81, 90), "x_odd"),
((20, 10, 81.1, 90), "x_odd"),
((10, 20, 90, 80), "y"),
((10, 20, 90, 81), "y_odd"),
((10, 20, 90, 81.1), "y_odd"),
((20, 20, 80, 80), "both"),
],
)
def test_rounded_rectangle_translucent(
xy: tuple[int, int, int, int], suffix: str
) -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im, "RGBA")
# Act
draw.rounded_rectangle(
xy, 30, fill=(255, 0, 0, 127), outline=(0, 255, 0, 127), width=5
)
# Assert
assert_image_equal_tofile(
im, "Tests/images/imagedraw_rounded_rectangle_" + suffix + ".png"
)
@pytest.mark.parametrize("bbox", BBOX)
def test_floodfill(bbox: Coords) -> None:
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(bbox, 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))
@pytest.mark.parametrize("bbox", BBOX)
def test_floodfill_border(bbox: Coords) -> None:
# floodfill() is experimental
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
draw.rectangle(bbox, 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_tofile(im, "Tests/images/imagedraw_floodfill2.png")
@pytest.mark.parametrize("bbox", BBOX)
def test_floodfill_thresh(bbox: Coords) -> None:
# floodfill() is experimental
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
draw.rectangle(bbox, 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_tofile(im, "Tests/images/imagedraw_floodfill2.png")
def test_floodfill_not_negative() -> None:
# 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_tofile(im, "Tests/images/imagedraw_floodfill_not_negative.png")
def create_base_image_draw(
size: tuple[int, int],
mode: str = DEFAULT_MODE,
background1: tuple[int, int, int] = WHITE,
background2: tuple[int, int, int] = GRAY,
) -> tuple[Image.Image, ImageDraw.ImageDraw]:
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() -> None:
expected = os.path.join(IMAGES_PATH, "square.png")
img, draw = create_base_image_draw((10, 10))
draw.polygon([(2, 2), (2, 7), (7, 7), (7, 2)], BLACK)
assert_image_equal_tofile(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_tofile(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_tofile(img, expected, "square as normal rectangle failed")
def test_triangle_right() -> None:
img, draw = create_base_image_draw((20, 20))
draw.polygon([(3, 5), (17, 5), (10, 12)], BLACK)
assert_image_equal_tofile(
img, os.path.join(IMAGES_PATH, "triangle_right.png"), "triangle right failed"
)
@pytest.mark.parametrize(
"fill, suffix",
((BLACK, "width"), (None, "width_no_fill")),
)
def test_triangle_right_width(fill: tuple[int, int, int] | None, suffix: str) -> None:
img, draw = create_base_image_draw((100, 100))
draw.polygon([(15, 25), (85, 25), (50, 60)], fill, WHITE, width=5)
assert_image_equal_tofile(
img, os.path.join(IMAGES_PATH, "triangle_right_" + suffix + ".png")
)
def test_line_horizontal() -> None:
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 5), BLACK, 2)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_horizontal_w2px_normal.png"),
"line straight horizontal normal 2px wide failed",
)
img, draw = create_base_image_draw((20, 20))
draw.line((14, 5, 5, 5), BLACK, 2)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_horizontal_w2px_inverted.png"),
"line straight horizontal inverted 2px wide failed",
)
expected = os.path.join(IMAGES_PATH, "line_horizontal_w3px.png")
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 5), BLACK, 3)
assert_image_equal_tofile(
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_tofile(
img, expected, "line straight horizontal inverted 3px wide failed"
)
img, draw = create_base_image_draw((200, 110))
draw.line((5, 55, 195, 55), BLACK, 101)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_horizontal_w101px.png"),
"line straight horizontal 101px wide failed",
)
def test_line_h_s1_w2() -> None:
pytest.skip("failing")
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 6), BLACK, 2)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_horizontal_slope1px_w2px.png"),
"line horizontal 1px slope 2px wide failed",
)
def test_line_vertical() -> None:
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 5, 14), BLACK, 2)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_vertical_w2px_normal.png"),
"line straight vertical normal 2px wide failed",
)
img, draw = create_base_image_draw((20, 20))
draw.line((5, 14, 5, 5), BLACK, 2)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_vertical_w2px_inverted.png"),
"line straight vertical inverted 2px wide failed",
)
expected = os.path.join(IMAGES_PATH, "line_vertical_w3px.png")
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 5, 14), BLACK, 3)
assert_image_equal_tofile(
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_tofile(
img, expected, "line straight vertical inverted 3px wide failed"
)
img, draw = create_base_image_draw((110, 200))
draw.line((55, 5, 55, 195), BLACK, 101)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_vertical_w101px.png"),
"line straight vertical 101px wide failed",
)
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 6, 14), BLACK, 2)
assert_image_equal_tofile(
img,
os.path.join(IMAGES_PATH, "line_vertical_slope1px_w2px.png"),
"line vertical 1px slope 2px wide failed",
)
def test_line_oblique_45() -> None:
expected = os.path.join(IMAGES_PATH, "line_oblique_45_w3px_a.png")
img, draw = create_base_image_draw((20, 20))
draw.line((5, 5, 14, 14), BLACK, 3)
assert_image_equal_tofile(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_tofile(
img, expected, "line oblique 45 inverted 3px wide A failed"
)
expected = os.path.join(IMAGES_PATH, "line_oblique_45_w3px_b.png")
img, draw = create_base_image_draw((20, 20))
draw.line((14, 5, 5, 14), BLACK, 3)
assert_image_equal_tofile(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_tofile(
img, expected, "line oblique 45 inverted 3px wide B failed"
)
def test_wide_line_dot() -> None:
# 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)
# Act
draw.line([(50, 50), (50, 50)], width=3)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_wide_line_dot.png", 1)
def test_wide_line_larger_than_int() -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
expected = "Tests/images/imagedraw_wide_line_larger_than_int.png"
# Act
draw.line([(0, 0), (32768, 32768)], width=3)
# Assert
assert_image_similar_tofile(im, expected, 1)
@pytest.mark.parametrize(
"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),
],
(
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,
),
[
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,
],
],
)
def test_line_joint(xy: list[tuple[int, int]] | tuple[int, ...] | list[int]) -> None:
im = Image.new("RGB", (500, 325))
draw = ImageDraw.Draw(im)
# Act
draw.line(xy, GRAY, 50, "curve")
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_line_joint_curve.png", 3)
def test_textsize_empty_string() -> None:
# 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.textbbox((0, 0), "")
draw.textbbox((0, 0), "\n")
draw.textbbox((0, 0), "test\n")
draw.textlength("")
@skip_unless_feature("freetype2")
def test_textbbox_stroke() -> None:
# Arrange
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 20)
# Act / Assert
assert draw.textbbox((2, 2), "A", font, stroke_width=2) == (0, 4, 16, 20)
assert draw.textbbox((2, 2), "A", font, stroke_width=4) == (-2, 2, 18, 22)
assert draw.textbbox((2, 2), "ABC\nAaaa", font, stroke_width=2) == (0, 4, 52, 44)
assert draw.textbbox((2, 2), "ABC\nAaaa", font, stroke_width=4) == (-2, 2, 54, 50)
@skip_unless_feature("freetype2")
def test_stroke() -> None:
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((12, 12), "A", "#f00", font, stroke_width=2, stroke_fill=stroke_fill)
# Assert
assert_image_similar_tofile(
im, "Tests/images/imagedraw_stroke_" + suffix + ".png", 3.1
)
@skip_unless_feature("freetype2")
def test_stroke_descender() -> None:
# Arrange
im = Image.new("RGB", (120, 130))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 120)
# Act
draw.text((12, 2), "y", "#f00", font, stroke_width=2, stroke_fill="#0f0")
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_stroke_descender.png", 6.76)
@skip_unless_feature("freetype2")
def test_split_word() -> None:
# Arrange
im = Image.new("RGB", (230, 55))
expected = im.copy()
expected_draw = ImageDraw.Draw(expected)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 48)
expected_draw.text((0, 0), "paradise", font=font)
draw = ImageDraw.Draw(im)
# Act
draw.text((0, 0), "par", font=font)
length = draw.textlength("par", font=font)
draw.text((length, 0), "adise", font=font)
# Assert
assert_image_equal(im, expected)
@skip_unless_feature("freetype2")
def test_stroke_multiline() -> None:
# Arrange
im = Image.new("RGB", (100, 250))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 120)
# Act
draw.multiline_text(
(12, 12), "A\nB", "#f00", font, stroke_width=2, stroke_fill="#0f0"
)
# Assert
assert_image_similar_tofile(im, "Tests/images/imagedraw_stroke_multiline.png", 3.3)
@skip_unless_feature("freetype2")
def test_setting_default_font() -> None:
# Arrange
im = Image.new("RGB", (100, 250))
draw = ImageDraw.Draw(im)
font = ImageFont.truetype("Tests/fonts/FreeMono.ttf", 120)
# Act
ImageDraw.ImageDraw.font = font
# Assert
try:
assert draw.getfont() == font
finally:
ImageDraw.ImageDraw.font = None
assert isinstance(draw.getfont(), ImageFont.load_default().__class__)
def test_default_font_size() -> None:
freetype_support = features.check_module("freetype2")
text = "Default font at a specific size."
im = Image.new("RGB", (220, 25))
draw = ImageDraw.Draw(im)
with contextlib.nullcontext() if freetype_support else pytest.raises(ImportError):
draw.text((0, 0), text, font_size=16)
assert_image_equal_tofile(im, "Tests/images/imagedraw_default_font_size.png")
with contextlib.nullcontext() if freetype_support else pytest.raises(ImportError):
assert draw.textlength(text, font_size=16) == 216
with contextlib.nullcontext() if freetype_support else pytest.raises(ImportError):
assert draw.textbbox((0, 0), text, font_size=16) == (0, 3, 216, 19)
im = Image.new("RGB", (220, 25))
draw = ImageDraw.Draw(im)
with contextlib.nullcontext() if freetype_support else pytest.raises(ImportError):
draw.multiline_text((0, 0), text, font_size=16)
assert_image_equal_tofile(im, "Tests/images/imagedraw_default_font_size.png")
with contextlib.nullcontext() if freetype_support else pytest.raises(ImportError):
assert draw.multiline_textbbox((0, 0), text, font_size=16) == (0, 3, 216, 19)
@pytest.mark.parametrize("bbox", BBOX)
def test_same_color_outline(bbox: Coords) -> None:
# 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"]:
fill = "red"
for outline in [None, "red", "#f00"]:
for operation, args in {
"chord": [bbox, 0, 180],
"ellipse": [bbox],
"shape": [s],
"pieslice": [bbox, -90, 45],
"polygon": [[(18, 30), (85, 30), (60, 72)]],
"rectangle": [bbox],
}.items():
# Arrange
im = Image.new(mode, (W, H))
draw = ImageDraw.Draw(im)
# Act
draw_method = getattr(draw, operation)
assert isinstance(args, list)
args += [fill, outline]
draw_method(*args)
# Assert
expected = f"Tests/images/imagedraw_outline_{operation}_{mode}.png"
assert_image_similar_tofile(im, expected, 1)
@pytest.mark.parametrize(
"n_sides, polygon_name, args",
[
(4, "square", {}),
(8, "regular_octagon", {}),
(4, "square_rotate_45", {"rotation": 45}),
(3, "triangle_width", {"width": 5, "outline": "yellow"}),
],
)
def test_draw_regular_polygon(
n_sides: int, polygon_name: str, args: dict[str, int | str]
) -> None:
im = Image.new("RGBA", size=(W, H), color=(255, 0, 0, 0))
filename = f"Tests/images/imagedraw_{polygon_name}.png"
draw = ImageDraw.Draw(im)
bounding_circle = ((W // 2, H // 2), 25)
draw.regular_polygon(bounding_circle, n_sides, fill="red", **args)
assert_image_equal_tofile(im, filename)
@pytest.mark.parametrize(
"n_sides, expected_vertices",
[
(3, [(28.35, 62.5), (71.65, 62.5), (50.0, 25.0)]),
(4, [(32.32, 67.68), (67.68, 67.68), (67.68, 32.32), (32.32, 32.32)]),
(
5,
[
(35.31, 70.23),
(64.69, 70.23),
(73.78, 42.27),
(50.0, 25.0),
(26.22, 42.27),
],
),
(
6,
[
(37.5, 71.65),
(62.5, 71.65),
(75.0, 50.0),
(62.5, 28.35),
(37.5, 28.35),
(25.0, 50.0),
],
),
],
)
def test_compute_regular_polygon_vertices(
n_sides: int, expected_vertices: list[tuple[float, float]]
) -> None:
bounding_circle = (W // 2, H // 2, 25)
vertices = ImageDraw._compute_regular_polygon_vertices(bounding_circle, n_sides, 0)
assert vertices == expected_vertices
@pytest.mark.parametrize(
"n_sides, bounding_circle, rotation, expected_error, error_message",
[
(None, (50, 50, 25), 0, TypeError, "n_sides should be an int"),
(1, (50, 50, 25), 0, ValueError, "n_sides should be an int > 2"),
(3, 50, 0, TypeError, "bounding_circle should be a sequence"),
(
3,
(50, 50, 100, 100),
0,
ValueError,
"bounding_circle should contain 2D coordinates "
"and a radius (e.g. (x, y, r) or ((x, y), r) )",
),
(
3,
(50, 50, "25"),
0,
ValueError,
"bounding_circle should only contain numeric data",
),
(
3,
((50, 50, 50), 25),
0,
ValueError,
"bounding_circle centre should contain 2D coordinates (e.g. (x, y))",
),
(
3,
(50, 50, 0),
0,
ValueError,
"bounding_circle radius should be > 0",
),
(
3,
(50, 50, 25),
"0",
ValueError,
"rotation should be an int or float",
),
],
)
def test_compute_regular_polygon_vertices_input_error_handling(
n_sides, bounding_circle, rotation, expected_error, error_message
) -> None:
with pytest.raises(expected_error) as e:
ImageDraw._compute_regular_polygon_vertices(bounding_circle, n_sides, rotation)
assert str(e.value) == error_message
def test_continuous_horizontal_edges_polygon() -> None:
xy = [
(2, 6),
(6, 6),
(12, 6),
(12, 12),
(8, 12),
(8, 8),
(4, 8),
(2, 8),
]
img, draw = create_base_image_draw((16, 16))
draw.polygon(xy, BLACK)
expected = os.path.join(IMAGES_PATH, "continuous_horizontal_edges_polygon.png")
assert_image_equal_tofile(
img, expected, "continuous horizontal edges polygon failed"
)
def test_discontiguous_corners_polygon() -> None:
img, draw = create_base_image_draw((84, 68))
draw.polygon(((1, 21), (34, 4), (71, 1), (38, 18)), BLACK)
draw.polygon(((71, 44), (38, 27), (1, 24)), BLACK)
draw.polygon(
((38, 66), (5, 49), (77, 49), (47, 66), (82, 63), (82, 47), (1, 47), (1, 63)),
BLACK,
)
expected = os.path.join(IMAGES_PATH, "discontiguous_corners_polygon.png")
assert_image_similar_tofile(img, expected, 1)
def test_polygon2() -> None:
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
draw.polygon([(18, 30), (19, 31), (18, 30), (85, 30), (60, 72)], "red")
expected = "Tests/images/imagedraw_outline_polygon_RGB.png"
assert_image_similar_tofile(im, expected, 1)
@pytest.mark.parametrize("xy", ((1, 1, 0, 1), (1, 1, 1, 0)))
def test_incorrectly_ordered_coordinates(xy: tuple[int, int, int, int]) -> None:
im = Image.new("RGB", (W, H))
draw = ImageDraw.Draw(im)
with pytest.raises(ValueError):
draw.arc(xy, 10, 260)
with pytest.raises(ValueError):
draw.chord(xy, 10, 260)
with pytest.raises(ValueError):
draw.ellipse(xy)
with pytest.raises(ValueError):
draw.pieslice(xy, 10, 260)
with pytest.raises(ValueError):
draw.rectangle(xy)
with pytest.raises(ValueError):
draw.rounded_rectangle(xy)
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