Pillow/Tests/test_imagefont.py

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import copy
import os
import re
import shutil
import sys
from io import BytesIO
import pytest
from packaging.version import parse as parse_version
from PIL import Image, ImageDraw, ImageFont, features
from .helper import (
assert_image_equal,
assert_image_equal_tofile,
assert_image_similar_tofile,
is_win32,
skip_unless_feature,
skip_unless_feature_version,
)
FONT_PATH = "Tests/fonts/FreeMono.ttf"
FONT_SIZE = 20
TEST_TEXT = "hey you\nyou are awesome\nthis looks awkward"
pytestmark = skip_unless_feature("freetype2")
class TestImageFont:
LAYOUT_ENGINE = ImageFont.Layout.BASIC
def get_font(self):
return ImageFont.truetype(
FONT_PATH, FONT_SIZE, layout_engine=self.LAYOUT_ENGINE
)
def test_sanity(self):
assert re.search(r"\d+\.\d+\.\d+$", features.version_module("freetype2"))
def test_font_properties(self):
ttf = self.get_font()
assert ttf.path == FONT_PATH
assert ttf.size == FONT_SIZE
ttf_copy = ttf.font_variant()
assert ttf_copy.path == FONT_PATH
assert ttf_copy.size == FONT_SIZE
ttf_copy = ttf.font_variant(size=FONT_SIZE + 1)
assert ttf_copy.size == FONT_SIZE + 1
second_font_path = "Tests/fonts/DejaVuSans/DejaVuSans.ttf"
ttf_copy = ttf.font_variant(font=second_font_path)
assert ttf_copy.path == second_font_path
def test_font_with_name(self):
self.get_font()
self._render(FONT_PATH)
def _font_as_bytes(self):
with open(FONT_PATH, "rb") as f:
font_bytes = BytesIO(f.read())
return font_bytes
def test_font_with_filelike(self):
ttf = ImageFont.truetype(
self._font_as_bytes(), FONT_SIZE, layout_engine=self.LAYOUT_ENGINE
)
ttf_copy = ttf.font_variant()
assert ttf_copy.font_bytes == ttf.font_bytes
self._render(self._font_as_bytes())
# Usage note: making two fonts from the same buffer fails.
# shared_bytes = self._font_as_bytes()
# self._render(shared_bytes)
# with pytest.raises(Exception):
# _render(shared_bytes)
def test_font_with_open_file(self):
with open(FONT_PATH, "rb") as f:
self._render(f)
def test_non_ascii_path(self, tmp_path):
tempfile = str(tmp_path / ("temp_" + chr(128) + ".ttf"))
try:
shutil.copy(FONT_PATH, tempfile)
except UnicodeEncodeError:
pytest.skip("Non-ASCII path could not be created")
ImageFont.truetype(tempfile, FONT_SIZE)
def _render(self, font):
txt = "Hello World!"
ttf = ImageFont.truetype(font, FONT_SIZE, layout_engine=self.LAYOUT_ENGINE)
ttf.getsize(txt)
img = Image.new("RGB", (256, 64), "white")
d = ImageDraw.Draw(img)
d.text((10, 10), txt, font=ttf, fill="black")
return img
def test_render_equal(self):
img_path = self._render(FONT_PATH)
with open(FONT_PATH, "rb") as f:
font_filelike = BytesIO(f.read())
img_filelike = self._render(font_filelike)
assert_image_equal(img_path, img_filelike)
def test_transparent_background(self):
im = Image.new(mode="RGBA", size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = self.get_font()
txt = "Hello World!"
draw.text((10, 10), txt, font=ttf)
target = "Tests/images/transparent_background_text.png"
assert_image_similar_tofile(im, target, 4.09)
target = "Tests/images/transparent_background_text_L.png"
assert_image_similar_tofile(im.convert("L"), target, 0.01)
def test_I16(self):
im = Image.new(mode="I;16", size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = self.get_font()
txt = "Hello World!"
draw.text((10, 10), txt, font=ttf)
target = "Tests/images/transparent_background_text_L.png"
assert_image_similar_tofile(im.convert("L"), target, 0.01)
def test_textsize_equal(self):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = self.get_font()
txt = "Hello World!"
size = draw.textsize(txt, ttf)
draw.text((10, 10), txt, font=ttf)
draw.rectangle((10, 10, 10 + size[0], 10 + size[1]))
assert_image_similar_tofile(
im, "Tests/images/rectangle_surrounding_text.png", 2.5
)
@pytest.mark.parametrize(
"text, mode, font, size, length_basic, length_raqm",
(
# basic test
("text", "L", "FreeMono.ttf", 15, 36, 36),
("text", "1", "FreeMono.ttf", 15, 36, 36),
# issue 4177
("rrr", "L", "DejaVuSans/DejaVuSans.ttf", 18, 21, 22.21875),
("rrr", "1", "DejaVuSans/DejaVuSans.ttf", 18, 24, 22.21875),
# test 'l' not including extra margin
# using exact value 2047 / 64 for raqm, checked with debugger
("ill", "L", "OpenSansCondensed-LightItalic.ttf", 63, 33, 31.984375),
("ill", "1", "OpenSansCondensed-LightItalic.ttf", 63, 33, 31.984375),
),
)
def test_getlength(self, text, mode, font, size, length_basic, length_raqm):
f = ImageFont.truetype(
"Tests/fonts/" + font, size, layout_engine=self.LAYOUT_ENGINE
)
im = Image.new(mode, (1, 1), 0)
d = ImageDraw.Draw(im)
if self.LAYOUT_ENGINE == ImageFont.Layout.BASIC:
length = d.textlength(text, f)
assert length == length_basic
else:
# disable kerning, kerning metrics changed
length = d.textlength(text, f, features=["-kern"])
assert length == length_raqm
def test_render_multiline(self):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = self.get_font()
line_spacing = draw.textsize("A", font=ttf)[1] + 4
lines = TEST_TEXT.split("\n")
y = 0
for line in lines:
draw.text((0, y), line, font=ttf)
y += line_spacing
# some versions of freetype have different horizontal spacing.
# setting a tight epsilon, I'm showing the original test failure
# at epsilon = ~38.
assert_image_similar_tofile(im, "Tests/images/multiline_text.png", 6.2)
def test_render_multiline_text(self):
ttf = self.get_font()
# Test that text() correctly connects to multiline_text()
# and that align defaults to left
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
draw.text((0, 0), TEST_TEXT, font=ttf)
assert_image_similar_tofile(im, "Tests/images/multiline_text.png", 0.01)
# Test that text() can pass on additional arguments
# to multiline_text()
draw.text(
(0, 0), TEST_TEXT, fill=None, font=ttf, anchor=None, spacing=4, align="left"
)
draw.text((0, 0), TEST_TEXT, None, ttf, None, 4, "left")
# Test align center and right
for align, ext in {"center": "_center", "right": "_right"}.items():
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
draw.multiline_text((0, 0), TEST_TEXT, font=ttf, align=align)
assert_image_similar_tofile(
im, "Tests/images/multiline_text" + ext + ".png", 0.01
)
def test_unknown_align(self):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = self.get_font()
# Act/Assert
with pytest.raises(ValueError):
draw.multiline_text((0, 0), TEST_TEXT, font=ttf, align="unknown")
def test_draw_align(self):
im = Image.new("RGB", (300, 100), "white")
draw = ImageDraw.Draw(im)
ttf = self.get_font()
line = "some text"
draw.text((100, 40), line, (0, 0, 0), font=ttf, align="left")
def test_multiline_size(self):
ttf = self.get_font()
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
# Test that textsize() correctly connects to multiline_textsize()
assert draw.textsize(TEST_TEXT, font=ttf) == draw.multiline_textsize(
TEST_TEXT, font=ttf
)
# Test that multiline_textsize corresponds to ImageFont.textsize()
# for single line text
assert ttf.getsize("A") == draw.multiline_textsize("A", font=ttf)
# Test that textsize() can pass on additional arguments
# to multiline_textsize()
draw.textsize(TEST_TEXT, font=ttf, spacing=4)
draw.textsize(TEST_TEXT, ttf, 4)
def test_multiline_width(self):
ttf = self.get_font()
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
assert (
draw.textsize("longest line", font=ttf)[0]
== draw.multiline_textsize("longest line\nline", font=ttf)[0]
)
def test_multiline_spacing(self):
ttf = self.get_font()
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
draw.multiline_text((0, 0), TEST_TEXT, font=ttf, spacing=10)
assert_image_similar_tofile(im, "Tests/images/multiline_text_spacing.png", 2.5)
def test_rotated_transposed_font(self):
img_grey = Image.new("L", (100, 100))
draw = ImageDraw.Draw(img_grey)
word = "testing"
font = self.get_font()
orientation = Image.Transpose.ROTATE_90
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Original font
draw.font = font
box_size_a = draw.textsize(word)
# Rotated font
draw.font = transposed_font
box_size_b = draw.textsize(word)
# Check (w,h) of box a is (h,w) of box b
assert box_size_a[0] == box_size_b[1]
assert box_size_a[1] == box_size_b[0]
def test_unrotated_transposed_font(self):
img_grey = Image.new("L", (100, 100))
draw = ImageDraw.Draw(img_grey)
word = "testing"
font = self.get_font()
orientation = None
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Original font
draw.font = font
box_size_a = draw.textsize(word)
# Rotated font
draw.font = transposed_font
box_size_b = draw.textsize(word)
# Check boxes a and b are same size
assert box_size_a == box_size_b
def test_rotated_transposed_font_get_mask(self):
# Arrange
text = "mask this"
font = self.get_font()
orientation = Image.Transpose.ROTATE_90
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Act
mask = transposed_font.getmask(text)
# Assert
assert mask.size == (13, 108)
def test_unrotated_transposed_font_get_mask(self):
# Arrange
text = "mask this"
font = self.get_font()
orientation = None
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Act
mask = transposed_font.getmask(text)
# Assert
assert mask.size == (108, 13)
def test_free_type_font_get_name(self):
# Arrange
font = self.get_font()
# Act
name = font.getname()
# Assert
assert ("FreeMono", "Regular") == name
def test_free_type_font_get_metrics(self):
# Arrange
font = self.get_font()
# Act
ascent, descent = font.getmetrics()
# Assert
assert isinstance(ascent, int)
assert isinstance(descent, int)
assert (ascent, descent) == (16, 4) # too exact check?
def test_free_type_font_get_offset(self):
# Arrange
font = self.get_font()
text = "offset this"
# Act
offset = font.getoffset(text)
# Assert
assert offset == (0, 3)
def test_free_type_font_get_mask(self):
# Arrange
font = self.get_font()
text = "mask this"
# Act
mask = font.getmask(text)
# Assert
assert mask.size == (108, 13)
def test_load_path_not_found(self):
# Arrange
filename = "somefilenamethatdoesntexist.ttf"
# Act/Assert
with pytest.raises(OSError):
ImageFont.load_path(filename)
with pytest.raises(OSError):
ImageFont.truetype(filename)
def test_load_non_font_bytes(self):
with open("Tests/images/hopper.jpg", "rb") as f:
with pytest.raises(OSError):
ImageFont.truetype(f)
def test_default_font(self):
# Arrange
txt = 'This is a "better than nothing" default font.'
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
# Act
default_font = ImageFont.load_default()
draw.text((10, 10), txt, font=default_font)
# Assert
assert_image_equal_tofile(im, "Tests/images/default_font.png")
def test_getsize_empty(self):
# issue #2614
font = self.get_font()
# should not crash.
assert (0, 0) == font.getsize("")
def test_render_empty(self):
# issue 2666
font = self.get_font()
im = Image.new(mode="RGB", size=(300, 100))
target = im.copy()
draw = ImageDraw.Draw(im)
# should not crash here.
draw.text((10, 10), "", font=font)
assert_image_equal(im, target)
def test_unicode_pilfont(self):
# should not segfault, should return UnicodeDecodeError
# issue #2826
font = ImageFont.load_default()
with pytest.raises(UnicodeEncodeError):
font.getsize("")
def test_unicode_extended(self):
# issue #3777
text = "A\u278A\U0001F12B"
target = "Tests/images/unicode_extended.png"
ttf = ImageFont.truetype(
"Tests/fonts/NotoSansSymbols-Regular.ttf",
FONT_SIZE,
layout_engine=self.LAYOUT_ENGINE,
)
img = Image.new("RGB", (100, 60))
d = ImageDraw.Draw(img)
d.text((10, 10), text, font=ttf)
# fails with 14.7
assert_image_similar_tofile(img, target, 6.2)
def _test_fake_loading_font(self, monkeypatch, path_to_fake, fontname):
# Make a copy of FreeTypeFont so we can patch the original
free_type_font = copy.deepcopy(ImageFont.FreeTypeFont)
with monkeypatch.context() as m:
m.setattr(ImageFont, "_FreeTypeFont", free_type_font, raising=False)
def loadable_font(filepath, size, index, encoding, *args, **kwargs):
if filepath == path_to_fake:
return ImageFont._FreeTypeFont(
FONT_PATH, size, index, encoding, *args, **kwargs
)
return ImageFont._FreeTypeFont(
filepath, size, index, encoding, *args, **kwargs
)
m.setattr(ImageFont, "FreeTypeFont", loadable_font)
font = ImageFont.truetype(fontname)
# Make sure it's loaded
name = font.getname()
assert ("FreeMono", "Regular") == name
@pytest.mark.skipif(is_win32(), reason="requires Unix or macOS")
def test_find_linux_font(self, monkeypatch):
# A lot of mocking here - this is more for hitting code and
# catching syntax like errors
font_directory = "/usr/local/share/fonts"
monkeypatch.setattr(sys, "platform", "linux")
monkeypatch.setenv("XDG_DATA_DIRS", "/usr/share/:/usr/local/share/")
def fake_walker(path):
if path == font_directory:
return [
(
path,
[],
["Arial.ttf", "Single.otf", "Duplicate.otf", "Duplicate.ttf"],
)
]
return [(path, [], ["some_random_font.ttf"])]
monkeypatch.setattr(os, "walk", fake_walker)
# Test that the font loads both with and without the
# extension
self._test_fake_loading_font(
monkeypatch, font_directory + "/Arial.ttf", "Arial.ttf"
)
self._test_fake_loading_font(
monkeypatch, font_directory + "/Arial.ttf", "Arial"
)
# Test that non-ttf fonts can be found without the
# extension
self._test_fake_loading_font(
monkeypatch, font_directory + "/Single.otf", "Single"
)
# Test that ttf fonts are preferred if the extension is
# not specified
self._test_fake_loading_font(
monkeypatch, font_directory + "/Duplicate.ttf", "Duplicate"
)
@pytest.mark.skipif(is_win32(), reason="requires Unix or macOS")
def test_find_macos_font(self, monkeypatch):
# Like the linux test, more cover hitting code rather than testing
# correctness.
font_directory = "/System/Library/Fonts"
monkeypatch.setattr(sys, "platform", "darwin")
def fake_walker(path):
if path == font_directory:
return [
(
path,
[],
["Arial.ttf", "Single.otf", "Duplicate.otf", "Duplicate.ttf"],
)
]
return [(path, [], ["some_random_font.ttf"])]
monkeypatch.setattr(os, "walk", fake_walker)
self._test_fake_loading_font(
monkeypatch, font_directory + "/Arial.ttf", "Arial.ttf"
)
self._test_fake_loading_font(
monkeypatch, font_directory + "/Arial.ttf", "Arial"
)
self._test_fake_loading_font(
monkeypatch, font_directory + "/Single.otf", "Single"
)
self._test_fake_loading_font(
monkeypatch, font_directory + "/Duplicate.ttf", "Duplicate"
)
def test_imagefont_getters(self):
# Arrange
t = self.get_font()
# Act / Assert
assert t.getmetrics() == (16, 4)
assert t.font.ascent == 16
assert t.font.descent == 4
assert t.font.height == 20
assert t.font.x_ppem == 20
assert t.font.y_ppem == 20
assert t.font.glyphs == 4177
assert t.getsize("A") == (12, 16)
assert t.getsize("AB") == (24, 16)
assert t.getsize("M") == (12, 16)
assert t.getsize("y") == (12, 20)
assert t.getsize("a") == (12, 16)
assert t.getsize_multiline("A") == (12, 16)
assert t.getsize_multiline("AB") == (24, 16)
assert t.getsize_multiline("a") == (12, 16)
assert t.getsize_multiline("ABC\n") == (36, 36)
assert t.getsize_multiline("ABC\nA") == (36, 36)
assert t.getsize_multiline("ABC\nAaaa") == (48, 36)
def test_getsize_stroke(self):
# Arrange
t = self.get_font()
# Act / Assert
for stroke_width in [0, 2]:
assert t.getsize("A", stroke_width=stroke_width) == (
12 + stroke_width * 2,
16 + stroke_width * 2,
)
assert t.getsize_multiline("ABC\nAaaa", stroke_width=stroke_width) == (
48 + stroke_width * 2,
36 + stroke_width * 4,
)
def test_complex_font_settings(self):
# Arrange
t = self.get_font()
# Act / Assert
if t.layout_engine == ImageFont.Layout.BASIC:
with pytest.raises(KeyError):
t.getmask("абвг", direction="rtl")
with pytest.raises(KeyError):
t.getmask("абвг", features=["-kern"])
with pytest.raises(KeyError):
t.getmask("абвг", language="sr")
def test_variation_get(self):
font = self.get_font()
freetype = parse_version(features.version_module("freetype2"))
if freetype < parse_version("2.9.1"):
with pytest.raises(NotImplementedError):
font.get_variation_names()
with pytest.raises(NotImplementedError):
font.get_variation_axes()
return
with pytest.raises(OSError):
font.get_variation_names()
with pytest.raises(OSError):
font.get_variation_axes()
font = ImageFont.truetype("Tests/fonts/AdobeVFPrototype.ttf")
assert font.get_variation_names(), [
b"ExtraLight",
b"Light",
b"Regular",
b"Semibold",
b"Bold",
b"Black",
b"Black Medium Contrast",
b"Black High Contrast",
b"Default",
]
assert font.get_variation_axes() == [
{"name": b"Weight", "minimum": 200, "maximum": 900, "default": 389},
{"name": b"Contrast", "minimum": 0, "maximum": 100, "default": 0},
]
font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf")
assert font.get_variation_names() == [
b"20",
b"40",
b"60",
b"80",
b"100",
b"120",
b"140",
b"160",
b"180",
b"200",
b"220",
b"240",
b"260",
b"280",
b"300",
b"Regular",
]
assert font.get_variation_axes() == [
{"name": b"Size", "minimum": 0, "maximum": 300, "default": 0}
]
def _check_text(self, font, path, epsilon):
im = Image.new("RGB", (100, 75), "white")
d = ImageDraw.Draw(im)
d.text((10, 10), "Text", font=font, fill="black")
try:
assert_image_similar_tofile(im, path, epsilon)
except AssertionError:
if "_adobe" in path:
path = path.replace("_adobe", "_adobe_older_harfbuzz")
assert_image_similar_tofile(im, path, epsilon)
else:
raise
def test_variation_set_by_name(self):
font = self.get_font()
freetype = parse_version(features.version_module("freetype2"))
if freetype < parse_version("2.9.1"):
with pytest.raises(NotImplementedError):
font.set_variation_by_name("Bold")
return
with pytest.raises(OSError):
font.set_variation_by_name("Bold")
font = ImageFont.truetype("Tests/fonts/AdobeVFPrototype.ttf", 36)
self._check_text(font, "Tests/images/variation_adobe.png", 11)
for name in ["Bold", b"Bold"]:
font.set_variation_by_name(name)
self._check_text(font, "Tests/images/variation_adobe_name.png", 11)
font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf", 36)
self._check_text(font, "Tests/images/variation_tiny.png", 40)
for name in ["200", b"200"]:
font.set_variation_by_name(name)
self._check_text(font, "Tests/images/variation_tiny_name.png", 40)
def test_variation_set_by_axes(self):
font = self.get_font()
freetype = parse_version(features.version_module("freetype2"))
if freetype < parse_version("2.9.1"):
with pytest.raises(NotImplementedError):
font.set_variation_by_axes([100])
return
with pytest.raises(OSError):
font.set_variation_by_axes([500, 50])
font = ImageFont.truetype("Tests/fonts/AdobeVFPrototype.ttf", 36)
font.set_variation_by_axes([500, 50])
self._check_text(font, "Tests/images/variation_adobe_axes.png", 11.05)
font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf", 36)
font.set_variation_by_axes([100])
self._check_text(font, "Tests/images/variation_tiny_axes.png", 32.5)
def test_textbbox_non_freetypefont(self):
im = Image.new("RGB", (200, 200))
d = ImageDraw.Draw(im)
default_font = ImageFont.load_default()
with pytest.warns(DeprecationWarning) as log:
width, height = d.textsize("test", font=default_font)
assert len(log) == 1
assert d.textlength("test", font=default_font) == width
assert d.textbbox((0, 0), "test", font=default_font) == (0, 0, width, height)
@pytest.mark.parametrize(
"anchor, left, top",
(
# test horizontal anchors
("ls", 0, -36),
("ms", -64, -36),
("rs", -128, -36),
# test vertical anchors
("ma", -64, 16),
("mt", -64, 0),
("mm", -64, -17),
("mb", -64, -44),
("md", -64, -51),
),
ids=("ls", "ms", "rs", "ma", "mt", "mm", "mb", "md"),
)
def test_anchor(self, anchor, left, top):
name, text = "quick", "Quick"
path = f"Tests/images/test_anchor_{name}_{anchor}.png"
if self.LAYOUT_ENGINE == ImageFont.Layout.RAQM:
width, height = (129, 44)
else:
width, height = (128, 44)
bbox_expected = (left, top, left + width, top + height)
f = ImageFont.truetype(
"Tests/fonts/NotoSans-Regular.ttf", 48, layout_engine=self.LAYOUT_ENGINE
)
im = Image.new("RGB", (200, 200), "white")
d = ImageDraw.Draw(im)
d.line(((0, 100), (200, 100)), "gray")
d.line(((100, 0), (100, 200)), "gray")
d.text((100, 100), text, fill="black", anchor=anchor, font=f)
assert d.textbbox((0, 0), text, f, anchor=anchor) == bbox_expected
assert_image_similar_tofile(im, path, 7)
@pytest.mark.parametrize(
"anchor, align",
(
# test horizontal anchors
("lm", "left"),
("lm", "center"),
("lm", "right"),
("mm", "left"),
("mm", "center"),
("mm", "right"),
("rm", "left"),
("rm", "center"),
("rm", "right"),
# test vertical anchors
("ma", "center"),
# ("mm", "center"), # duplicate
("md", "center"),
),
)
def test_anchor_multiline(self, anchor, align):
target = f"Tests/images/test_anchor_multiline_{anchor}_{align}.png"
text = "a\nlong\ntext sample"
f = ImageFont.truetype(
"Tests/fonts/NotoSans-Regular.ttf", 48, layout_engine=self.LAYOUT_ENGINE
)
# test render
im = Image.new("RGB", (600, 400), "white")
d = ImageDraw.Draw(im)
d.line(((0, 200), (600, 200)), "gray")
d.line(((300, 0), (300, 400)), "gray")
d.multiline_text(
(300, 200), text, fill="black", anchor=anchor, font=f, align=align
)
assert_image_similar_tofile(im, target, 4)
def test_anchor_invalid(self):
font = self.get_font()
im = Image.new("RGB", (100, 100), "white")
d = ImageDraw.Draw(im)
d.font = font
for anchor in ["", "l", "a", "lax", "sa", "xa", "lx"]:
pytest.raises(ValueError, lambda: font.getmask2("hello", anchor=anchor))
pytest.raises(ValueError, lambda: font.getbbox("hello", anchor=anchor))
pytest.raises(ValueError, lambda: d.text((0, 0), "hello", anchor=anchor))
pytest.raises(
ValueError, lambda: d.textbbox((0, 0), "hello", anchor=anchor)
)
pytest.raises(
ValueError, lambda: d.multiline_text((0, 0), "foo\nbar", anchor=anchor)
)
pytest.raises(
ValueError,
lambda: d.multiline_textbbox((0, 0), "foo\nbar", anchor=anchor),
)
for anchor in ["lt", "lb"]:
pytest.raises(
ValueError, lambda: d.multiline_text((0, 0), "foo\nbar", anchor=anchor)
)
pytest.raises(
ValueError,
lambda: d.multiline_textbbox((0, 0), "foo\nbar", anchor=anchor),
)
@skip_unless_feature("freetype2")
@pytest.mark.parametrize("bpp", (1, 2, 4, 8))
def test_bitmap_font(self, bpp):
text = "Bitmap Font"
layout_name = ["basic", "raqm"][self.LAYOUT_ENGINE]
target = f"Tests/images/bitmap_font_{bpp}_{layout_name}.png"
font = ImageFont.truetype(
f"Tests/fonts/DejaVuSans/DejaVuSans-24-{bpp}-stripped.ttf",
24,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (160, 35), "white")
draw = ImageDraw.Draw(im)
draw.text((2, 2), text, "black", font)
assert_image_equal_tofile(im, target)
def test_bitmap_font_stroke(self):
text = "Bitmap Font"
layout_name = ["basic", "raqm"][self.LAYOUT_ENGINE]
target = f"Tests/images/bitmap_font_stroke_{layout_name}.png"
font = ImageFont.truetype(
"Tests/fonts/DejaVuSans/DejaVuSans-24-8-stripped.ttf",
24,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (160, 35), "white")
draw = ImageDraw.Draw(im)
draw.text((2, 2), text, "black", font, stroke_width=2, stroke_fill="red")
assert_image_similar_tofile(im, target, 0.03)
def test_standard_embedded_color(self):
txt = "Hello World!"
ttf = ImageFont.truetype(FONT_PATH, 40, layout_engine=self.LAYOUT_ENGINE)
ttf.getsize(txt)
im = Image.new("RGB", (300, 64), "white")
d = ImageDraw.Draw(im)
d.text((10, 10), txt, font=ttf, fill="#fa6", embedded_color=True)
assert_image_similar_tofile(im, "Tests/images/standard_embedded.png", 6.2)
def test_cbdt(self):
try:
font = ImageFont.truetype(
"Tests/fonts/NotoColorEmoji.ttf",
size=109,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (150, 150), "white")
d = ImageDraw.Draw(im)
d.text((10, 10), "\U0001f469", font=font, embedded_color=True)
assert_image_similar_tofile(im, "Tests/images/cbdt_notocoloremoji.png", 6.2)
except OSError as e: # pragma: no cover
assert str(e) in ("unimplemented feature", "unknown file format")
pytest.skip("freetype compiled without libpng or CBDT support")
def test_cbdt_mask(self):
try:
font = ImageFont.truetype(
"Tests/fonts/NotoColorEmoji.ttf",
size=109,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (150, 150), "white")
d = ImageDraw.Draw(im)
d.text((10, 10), "\U0001f469", "black", font=font)
assert_image_similar_tofile(
im, "Tests/images/cbdt_notocoloremoji_mask.png", 6.2
)
except OSError as e: # pragma: no cover
assert str(e) in ("unimplemented feature", "unknown file format")
pytest.skip("freetype compiled without libpng or CBDT support")
def test_sbix(self):
try:
font = ImageFont.truetype(
"Tests/fonts/chromacheck-sbix.woff",
size=300,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (400, 400), "white")
d = ImageDraw.Draw(im)
d.text((50, 50), "\uE901", font=font, embedded_color=True)
assert_image_similar_tofile(im, "Tests/images/chromacheck-sbix.png", 1)
except OSError as e: # pragma: no cover
assert str(e) in ("unimplemented feature", "unknown file format")
pytest.skip("freetype compiled without libpng or SBIX support")
def test_sbix_mask(self):
try:
font = ImageFont.truetype(
"Tests/fonts/chromacheck-sbix.woff",
size=300,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (400, 400), "white")
d = ImageDraw.Draw(im)
d.text((50, 50), "\uE901", (100, 0, 0), font=font)
assert_image_similar_tofile(im, "Tests/images/chromacheck-sbix_mask.png", 1)
except OSError as e: # pragma: no cover
assert str(e) in ("unimplemented feature", "unknown file format")
pytest.skip("freetype compiled without libpng or SBIX support")
@skip_unless_feature_version("freetype2", "2.10.0")
def test_colr(self):
font = ImageFont.truetype(
"Tests/fonts/BungeeColor-Regular_colr_Windows.ttf",
size=64,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (300, 75), "white")
d = ImageDraw.Draw(im)
d.text((15, 5), "Bungee", font=font, embedded_color=True)
assert_image_similar_tofile(im, "Tests/images/colr_bungee.png", 21)
@skip_unless_feature_version("freetype2", "2.10.0")
def test_colr_mask(self):
font = ImageFont.truetype(
"Tests/fonts/BungeeColor-Regular_colr_Windows.ttf",
size=64,
layout_engine=self.LAYOUT_ENGINE,
)
im = Image.new("RGB", (300, 75), "white")
d = ImageDraw.Draw(im)
d.text((15, 5), "Bungee", "black", font=font)
assert_image_similar_tofile(im, "Tests/images/colr_bungee_mask.png", 22)
def test_fill_deprecation(self):
font = self.get_font()
with pytest.warns(DeprecationWarning):
font.getmask2("Hello world", fill=Image.core.fill)
with pytest.warns(DeprecationWarning):
with pytest.raises(TypeError):
font.getmask2("Hello world", fill=None)
@skip_unless_feature("raqm")
class TestImageFont_RaqmLayout(TestImageFont):
LAYOUT_ENGINE = ImageFont.Layout.RAQM
def test_render_mono_size():
# issue 4177
im = Image.new("P", (100, 30), "white")
draw = ImageDraw.Draw(im)
ttf = ImageFont.truetype(
"Tests/fonts/DejaVuSans/DejaVuSans.ttf",
18,
layout_engine=ImageFont.Layout.BASIC,
)
draw.text((10, 10), "r" * 10, "black", ttf)
assert_image_equal_tofile(im, "Tests/images/text_mono.gif")
@pytest.mark.parametrize(
"test_file",
[
"Tests/fonts/oom-e8e927ba6c0d38274a37c1567560eb33baf74627.ttf",
],
)
def test_oom(test_file):
with open(test_file, "rb") as f:
font = ImageFont.truetype(BytesIO(f.read()))
with pytest.raises(Image.DecompressionBombError):
font.getmask("Test Text")
def test_raqm_missing_warning(monkeypatch):
monkeypatch.setattr(ImageFont.core, "HAVE_RAQM", False)
with pytest.warns(UserWarning) as record:
font = ImageFont.truetype(
FONT_PATH, FONT_SIZE, layout_engine=ImageFont.Layout.RAQM
)
assert font.layout_engine == ImageFont.Layout.BASIC
assert str(record[-1].message) == (
"Raqm layout was requested, but Raqm is not available. "
"Falling back to basic layout."
)
def test_constants_deprecation():
for enum, prefix in {
ImageFont.Layout: "LAYOUT_",
}.items():
for name in enum.__members__:
with pytest.warns(DeprecationWarning):
assert getattr(ImageFont, prefix + name) == enum[name]