Pillow/Tests/test_imagefont.py
2023-12-28 21:07:16 +11:00

1094 lines
32 KiB
Python

from __future__ import annotations
import copy
import os
import re
import shutil
import sys
from io import BytesIO
from pathlib import Path
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")
def test_sanity():
assert re.search(r"\d+\.\d+\.\d+$", features.version_module("freetype2"))
@pytest.fixture(
scope="module",
params=[
pytest.param(ImageFont.Layout.BASIC),
pytest.param(ImageFont.Layout.RAQM, marks=skip_unless_feature("raqm")),
],
)
def layout_engine(request):
return request.param
@pytest.fixture(scope="module")
def font(layout_engine):
return ImageFont.truetype(FONT_PATH, FONT_SIZE, layout_engine=layout_engine)
def test_font_properties(font):
assert font.path == FONT_PATH
assert font.size == FONT_SIZE
font_copy = font.font_variant()
assert font_copy.path == FONT_PATH
assert font_copy.size == FONT_SIZE
font_copy = font.font_variant(size=FONT_SIZE + 1)
assert font_copy.size == FONT_SIZE + 1
second_font_path = "Tests/fonts/DejaVuSans/DejaVuSans.ttf"
font_copy = font.font_variant(font=second_font_path)
assert font_copy.path == second_font_path
def _render(font, layout_engine):
txt = "Hello World!"
ttf = ImageFont.truetype(font, FONT_SIZE, layout_engine=layout_engine)
ttf.getbbox(txt)
img = Image.new("RGB", (256, 64), "white")
d = ImageDraw.Draw(img)
d.text((10, 10), txt, font=ttf, fill="black")
return img
@pytest.mark.parametrize("font", (FONT_PATH, Path(FONT_PATH)))
def test_font_with_name(layout_engine, font):
_render(font, layout_engine)
def test_font_with_filelike(layout_engine):
def _font_as_bytes():
with open(FONT_PATH, "rb") as f:
font_bytes = BytesIO(f.read())
return font_bytes
ttf = ImageFont.truetype(_font_as_bytes(), FONT_SIZE, layout_engine=layout_engine)
ttf_copy = ttf.font_variant()
assert ttf_copy.font_bytes == ttf.font_bytes
_render(_font_as_bytes(), layout_engine)
# Usage note: making two fonts from the same buffer fails.
# shared_bytes = _font_as_bytes()
# _render(shared_bytes)
# with pytest.raises(Exception):
# _render(shared_bytes)
def test_font_with_open_file(layout_engine):
with open(FONT_PATH, "rb") as f:
_render(f, layout_engine)
def test_render_equal(layout_engine):
img_path = _render(FONT_PATH, layout_engine)
with open(FONT_PATH, "rb") as f:
font_filelike = BytesIO(f.read())
img_filelike = _render(font_filelike, layout_engine)
assert_image_equal(img_path, img_filelike)
def test_non_ascii_path(tmp_path, layout_engine):
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, layout_engine=layout_engine)
def test_transparent_background(font):
im = Image.new(mode="RGBA", size=(300, 100))
draw = ImageDraw.Draw(im)
txt = "Hello World!"
draw.text((10, 10), txt, font=font)
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(font):
im = Image.new(mode="I;16", size=(300, 100))
draw = ImageDraw.Draw(im)
txt = "Hello World!"
draw.text((10, 10), txt, fill=0xFFFE, font=font)
assert im.getpixel((12, 14)) == 0xFFFE
target = "Tests/images/transparent_background_text_L.png"
assert_image_similar_tofile(im.convert("L"), target, 0.01)
def test_textbbox_equal(font):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
txt = "Hello World!"
bbox = draw.textbbox((10, 10), txt, font)
draw.text((10, 10), txt, font=font)
draw.rectangle(bbox)
assert_image_similar_tofile(im, "Tests/images/rectangle_surrounding_text.png", 2.5)
@pytest.mark.parametrize(
"text, mode, fontname, 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(
text, mode, fontname, size, layout_engine, length_basic, length_raqm
):
f = ImageFont.truetype("Tests/fonts/" + fontname, size, layout_engine=layout_engine)
im = Image.new(mode, (1, 1), 0)
d = ImageDraw.Draw(im)
if 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_float_size():
lengths = []
for size in (48, 48.5, 49):
f = ImageFont.truetype(
"Tests/fonts/NotoSans-Regular.ttf", size, layout_engine=layout_engine
)
lengths.append(f.getlength("text"))
assert lengths[0] != lengths[1] != lengths[2]
def test_render_multiline(font):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
line_spacing = font.getbbox("A")[3] + 4
lines = TEST_TEXT.split("\n")
y = 0
for line in lines:
draw.text((0, y), line, font=font)
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(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=font)
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=font, anchor=None, spacing=4, align="left"
)
draw.text((0, 0), TEST_TEXT, None, font, None, 4, "left")
@pytest.mark.parametrize(
"align, ext", (("left", ""), ("center", "_center"), ("right", "_right"))
)
def test_render_multiline_text_align(font, align, ext):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
draw.multiline_text((0, 0), TEST_TEXT, font=font, align=align)
assert_image_similar_tofile(im, f"Tests/images/multiline_text{ext}.png", 0.01)
def test_unknown_align(font):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
# Act/Assert
with pytest.raises(ValueError):
draw.multiline_text((0, 0), TEST_TEXT, font=font, align="unknown")
def test_draw_align(font):
im = Image.new("RGB", (300, 100), "white")
draw = ImageDraw.Draw(im)
line = "some text"
draw.text((100, 40), line, (0, 0, 0), font=font, align="left")
def test_multiline_bbox(font):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
# Test that textbbox() correctly connects to multiline_textbbox()
assert draw.textbbox((0, 0), TEST_TEXT, font=font) == draw.multiline_textbbox(
(0, 0), TEST_TEXT, font=font
)
# Test that multiline_textbbox corresponds to ImageFont.textbbox()
# for single line text
assert font.getbbox("A") == draw.multiline_textbbox((0, 0), "A", font=font)
# Test that textbbox() can pass on additional arguments
# to multiline_textbbox()
draw.textbbox((0, 0), TEST_TEXT, font=font, spacing=4)
def test_multiline_width(font):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
assert (
draw.textbbox((0, 0), "longest line", font=font)[2]
== draw.multiline_textbbox((0, 0), "longest line\nline", font=font)[2]
)
def test_multiline_spacing(font):
im = Image.new(mode="RGB", size=(300, 100))
draw = ImageDraw.Draw(im)
draw.multiline_text((0, 0), TEST_TEXT, font=font, spacing=10)
assert_image_similar_tofile(im, "Tests/images/multiline_text_spacing.png", 2.5)
@pytest.mark.parametrize(
"orientation", (Image.Transpose.ROTATE_90, Image.Transpose.ROTATE_270)
)
def test_rotated_transposed_font(font, orientation):
img_gray = Image.new("L", (100, 100))
draw = ImageDraw.Draw(img_gray)
word = "testing"
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Original font
draw.font = font
bbox_a = draw.textbbox((10, 10), word)
# Rotated font
draw.font = transposed_font
bbox_b = draw.textbbox((20, 20), word)
# Check (w, h) of box a is (h, w) of box b
assert (
bbox_a[2] - bbox_a[0],
bbox_a[3] - bbox_a[1],
) == (
bbox_b[3] - bbox_b[1],
bbox_b[2] - bbox_b[0],
)
# Check top left co-ordinates are correct
assert bbox_b[:2] == (20, 20)
# text length is undefined for vertical text
with pytest.raises(ValueError):
draw.textlength(word)
@pytest.mark.parametrize(
"orientation",
(
None,
Image.Transpose.ROTATE_180,
Image.Transpose.FLIP_LEFT_RIGHT,
Image.Transpose.FLIP_TOP_BOTTOM,
),
)
def test_unrotated_transposed_font(font, orientation):
img_gray = Image.new("L", (100, 100))
draw = ImageDraw.Draw(img_gray)
word = "testing"
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Original font
draw.font = font
bbox_a = draw.textbbox((10, 10), word)
length_a = draw.textlength(word)
# Rotated font
draw.font = transposed_font
bbox_b = draw.textbbox((20, 20), word)
length_b = draw.textlength(word)
# Check boxes a and b are same size
assert (
bbox_a[2] - bbox_a[0],
bbox_a[3] - bbox_a[1],
) == (
bbox_b[2] - bbox_b[0],
bbox_b[3] - bbox_b[1],
)
# Check top left co-ordinates are correct
assert bbox_b[:2] == (20, 20)
assert length_a == length_b
@pytest.mark.parametrize(
"orientation", (Image.Transpose.ROTATE_90, Image.Transpose.ROTATE_270)
)
def test_rotated_transposed_font_get_mask(font, orientation):
# Arrange
text = "mask this"
transposed_font = ImageFont.TransposedFont(font, orientation=orientation)
# Act
mask = transposed_font.getmask(text)
# Assert
assert mask.size == (13, 108)
@pytest.mark.parametrize(
"orientation",
(
None,
Image.Transpose.ROTATE_180,
Image.Transpose.FLIP_LEFT_RIGHT,
Image.Transpose.FLIP_TOP_BOTTOM,
),
)
def test_unrotated_transposed_font_get_mask(font, orientation):
# Arrange
text = "mask this"
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(font):
assert ("FreeMono", "Regular") == font.getname()
def test_free_type_font_get_metrics(font):
ascent, descent = font.getmetrics()
assert isinstance(ascent, int)
assert isinstance(descent, int)
assert (ascent, descent) == (16, 4)
def test_free_type_font_get_mask(font):
# Arrange
text = "mask this"
# Act
mask = font.getmask(text)
# Assert
assert mask.size == (108, 13)
def test_load_path_not_found():
# 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():
with open("Tests/images/hopper.jpg", "rb") as f:
with pytest.raises(OSError):
ImageFont.truetype(f)
def test_default_font():
# Arrange
txt = "This is a default font using FreeType support."
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)
larger_default_font = ImageFont.load_default(size=14)
draw.text((10, 60), txt, font=larger_default_font)
# Assert
assert_image_equal_tofile(im, "Tests/images/default_font_freetype.png")
@pytest.mark.parametrize("mode", (None, "1", "RGBA"))
def test_getbbox(font, mode):
assert (0, 4, 12, 16) == font.getbbox("A", mode)
def test_getbbox_empty(font):
# issue #2614, should not crash.
assert (0, 0, 0, 0) == font.getbbox("")
def test_render_empty(font):
# issue 2666
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_extended(layout_engine):
# issue #3777
text = "A\u278A\U0001F12B"
target = "Tests/images/unicode_extended.png"
ttf = ImageFont.truetype(
"Tests/fonts/NotoSansSymbols-Regular.ttf",
FONT_SIZE,
layout_engine=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)
@pytest.mark.parametrize(
"platform, font_directory",
(("linux", "/usr/local/share/fonts"), ("darwin", "/System/Library/Fonts")),
)
@pytest.mark.skipif(is_win32(), reason="requires Unix or macOS")
def test_find_font(monkeypatch, platform, font_directory):
def _test_fake_loading_font(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
# A lot of mocking here - this is more for hitting code and
# catching syntax like errors
monkeypatch.setattr(sys, "platform", platform)
if 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
_test_fake_loading_font(font_directory + "/Arial.ttf", "Arial.ttf")
_test_fake_loading_font(font_directory + "/Arial.ttf", "Arial")
# Test that non-ttf fonts can be found without the extension
_test_fake_loading_font(font_directory + "/Single.otf", "Single")
# Test that ttf fonts are preferred if the extension is not specified
_test_fake_loading_font(font_directory + "/Duplicate.ttf", "Duplicate")
def test_imagefont_getters(font):
assert font.getmetrics() == (16, 4)
assert font.font.ascent == 16
assert font.font.descent == 4
assert font.font.height == 20
assert font.font.x_ppem == 20
assert font.font.y_ppem == 20
assert font.font.glyphs == 4177
assert font.getbbox("A") == (0, 4, 12, 16)
assert font.getbbox("AB") == (0, 4, 24, 16)
assert font.getbbox("M") == (0, 4, 12, 16)
assert font.getbbox("y") == (0, 7, 12, 20)
assert font.getbbox("a") == (0, 7, 12, 16)
assert font.getlength("A") == 12
assert font.getlength("AB") == 24
assert font.getlength("M") == 12
assert font.getlength("y") == 12
assert font.getlength("a") == 12
@pytest.mark.parametrize("stroke_width", (0, 2))
def test_getsize_stroke(font, stroke_width):
assert font.getbbox("A", stroke_width=stroke_width) == (
0 - stroke_width,
4 - stroke_width,
12 + stroke_width,
16 + stroke_width,
)
def test_complex_font_settings():
t = ImageFont.truetype(FONT_PATH, FONT_SIZE, 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(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(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(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)
_check_text(font, "Tests/images/variation_adobe.png", 11)
for name in ["Bold", b"Bold"]:
font.set_variation_by_name(name)
assert font.getname()[1] == "Bold"
_check_text(font, "Tests/images/variation_adobe_name.png", 16)
font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf", 36)
_check_text(font, "Tests/images/variation_tiny.png", 40)
for name in ["200", b"200"]:
font.set_variation_by_name(name)
assert font.getname()[1] == "200"
_check_text(font, "Tests/images/variation_tiny_name.png", 40)
def test_variation_set_by_axes(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])
_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])
_check_text(font, "Tests/images/variation_tiny_axes.png", 32.5)
@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(layout_engine, anchor, left, top):
name, text = "quick", "Quick"
path = f"Tests/images/test_anchor_{name}_{anchor}.png"
if 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=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(layout_engine, 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=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(font):
im = Image.new("RGB", (100, 100), "white")
d = ImageDraw.Draw(im)
d.font = font
for anchor in ["", "l", "a", "lax", "sa", "xa", "lx"]:
with pytest.raises(ValueError):
font.getmask2("hello", anchor=anchor)
with pytest.raises(ValueError):
font.getbbox("hello", anchor=anchor)
with pytest.raises(ValueError):
d.text((0, 0), "hello", anchor=anchor)
with pytest.raises(ValueError):
d.textbbox((0, 0), "hello", anchor=anchor)
with pytest.raises(ValueError):
d.multiline_text((0, 0), "foo\nbar", anchor=anchor)
with pytest.raises(ValueError):
d.multiline_textbbox((0, 0), "foo\nbar", anchor=anchor)
for anchor in ["lt", "lb"]:
with pytest.raises(ValueError):
d.multiline_text((0, 0), "foo\nbar", anchor=anchor)
with pytest.raises(ValueError):
d.multiline_textbbox((0, 0), "foo\nbar", anchor=anchor)
@pytest.mark.parametrize("bpp", (1, 2, 4, 8))
def test_bitmap_font(layout_engine, bpp):
text = "Bitmap Font"
layout_name = ["basic", "raqm"][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=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(layout_engine):
text = "Bitmap Font"
layout_name = ["basic", "raqm"][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=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)
@pytest.mark.parametrize("embedded_color", (False, True))
def test_bitmap_blend(layout_engine, embedded_color):
font = ImageFont.truetype(
"Tests/fonts/EBDTTestFont.ttf", size=64, layout_engine=layout_engine
)
im = Image.new("RGBA", (128, 96), "white")
d = ImageDraw.Draw(im)
d.text((16, 16), "AA", font=font, fill="#8E2F52", embedded_color=embedded_color)
assert_image_equal_tofile(im, "Tests/images/bitmap_font_blend.png")
def test_standard_embedded_color(layout_engine):
txt = "Hello World!"
ttf = ImageFont.truetype(FONT_PATH, 40, layout_engine=layout_engine)
ttf.getbbox(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", 3.1)
@pytest.mark.parametrize("fontmode", ("1", "L", "RGBA"))
def test_float_coord(layout_engine, fontmode):
txt = "Hello World!"
ttf = ImageFont.truetype(FONT_PATH, 40, layout_engine=layout_engine)
im = Image.new("RGB", (300, 64), "white")
d = ImageDraw.Draw(im)
if fontmode == "1":
d.fontmode = "1"
embedded_color = fontmode == "RGBA"
d.text((9.5, 9.5), txt, font=ttf, fill="#fa6", embedded_color=embedded_color)
try:
assert_image_similar_tofile(im, "Tests/images/text_float_coord.png", 3.9)
except AssertionError:
if fontmode == "1" and layout_engine == ImageFont.Layout.BASIC:
assert_image_similar_tofile(
im, "Tests/images/text_float_coord_1_alt.png", 1
)
else:
raise
def test_cbdt(layout_engine):
try:
font = ImageFont.truetype(
"Tests/fonts/CBDTTestFont.ttf", size=64, layout_engine=layout_engine
)
im = Image.new("RGB", (128, 96), "white")
d = ImageDraw.Draw(im)
d.text((16, 16), "AB", font=font, embedded_color=True)
assert_image_equal_tofile(im, "Tests/images/cbdt.png")
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(layout_engine):
try:
font = ImageFont.truetype(
"Tests/fonts/CBDTTestFont.ttf", size=64, layout_engine=layout_engine
)
im = Image.new("RGB", (128, 96), "white")
d = ImageDraw.Draw(im)
d.text((16, 16), "AB", "green", font=font)
assert_image_equal_tofile(im, "Tests/images/cbdt_mask.png")
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(layout_engine):
try:
font = ImageFont.truetype(
"Tests/fonts/chromacheck-sbix.woff", size=300, layout_engine=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(layout_engine):
try:
font = ImageFont.truetype(
"Tests/fonts/chromacheck-sbix.woff", size=300, layout_engine=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(layout_engine):
font = ImageFont.truetype(
"Tests/fonts/BungeeColor-Regular_colr_Windows.ttf",
size=64,
layout_engine=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(layout_engine):
font = ImageFont.truetype(
"Tests/fonts/BungeeColor-Regular_colr_Windows.ttf",
size=64,
layout_engine=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_woff2(layout_engine):
try:
font = ImageFont.truetype(
"Tests/fonts/OpenSans.woff2",
size=64,
layout_engine=layout_engine,
)
except OSError as e:
assert str(e) in ("unimplemented feature", "unknown file format")
pytest.skip("FreeType compiled without brotli or WOFF2 support")
im = Image.new("RGB", (350, 100), "white")
d = ImageDraw.Draw(im)
d.text((15, 5), "OpenSans", "black", font=font)
assert_image_similar_tofile(im, "Tests/images/test_woff2.png", 5)
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")
def test_too_many_characters(font):
with pytest.raises(ValueError):
font.getlength("A" * 1_000_001)
with pytest.raises(ValueError):
font.getbbox("A" * 1_000_001)
with pytest.raises(ValueError):
font.getmask2("A" * 1_000_001)
transposed_font = ImageFont.TransposedFont(font)
with pytest.raises(ValueError):
transposed_font.getlength("A" * 1_000_001)
imagefont = ImageFont.ImageFont()
with pytest.raises(ValueError):
imagefont.getlength("A" * 1_000_001)
with pytest.raises(ValueError):
imagefont.getbbox("A" * 1_000_001)
@pytest.mark.parametrize(
"test_file",
[
"Tests/fonts/oom-e8e927ba6c0d38274a37c1567560eb33baf74627.ttf",
"Tests/fonts/oom-4da0210eb7081b0bf15bf16cc4c52ce02c1e1bbc.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."
)
@pytest.mark.parametrize("size", [-1, 0])
def test_invalid_truetype_sizes_raise_valueerror(layout_engine, size):
with pytest.raises(ValueError):
ImageFont.truetype(FONT_PATH, size, layout_engine=layout_engine)