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85 lines
2.5 KiB
Python
85 lines
2.5 KiB
Python
from __future__ import annotations
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import struct
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from io import BytesIO
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import pytest
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from PIL import Image, ImageDraw, ImageFont, _util, features
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from .helper import assert_image_equal_tofile, timeout_unless_slower_valgrind
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fonts = [ImageFont.load_default_imagefont()]
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if not features.check_module("freetype2"):
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default_font = ImageFont.load_default()
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if isinstance(default_font, ImageFont.ImageFont):
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fonts.append(default_font)
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@pytest.mark.parametrize("font", fonts)
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def test_default_font(font: ImageFont.ImageFont) -> None:
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# Arrange
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txt = 'This is a "better than nothing" default font.'
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im = Image.new(mode="RGB", size=(300, 100))
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draw = ImageDraw.Draw(im)
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# Act
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draw.text((10, 10), txt, font=font)
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# Assert
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assert_image_equal_tofile(im, "Tests/images/default_font.png")
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def test_without_freetype() -> None:
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original_core = ImageFont.core
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if features.check_module("freetype2"):
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ImageFont.core = _util.DeferredError(ImportError("Disabled for testing"))
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try:
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with pytest.raises(ImportError):
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ImageFont.truetype("Tests/fonts/FreeMono.ttf")
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assert isinstance(ImageFont.load_default(), ImageFont.ImageFont)
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with pytest.raises(ImportError):
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ImageFont.load_default(size=14)
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finally:
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ImageFont.core = original_core
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@pytest.mark.parametrize("font", fonts)
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def test_unicode(font: ImageFont.ImageFont) -> None:
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# should not segfault, should return UnicodeDecodeError
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# issue #2826
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with pytest.raises(UnicodeEncodeError):
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font.getbbox("’")
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@pytest.mark.parametrize("font", fonts)
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def test_textbbox(font: ImageFont.ImageFont) -> None:
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im = Image.new("RGB", (200, 200))
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d = ImageDraw.Draw(im)
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assert d.textlength("test", font=font) == 24
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assert d.textbbox((0, 0), "test", font=font) == (0, 0, 24, 11)
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def test_decompression_bomb() -> None:
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glyph = struct.pack(">hhhhhhhhhh", 1, 0, 0, 0, 256, 256, 0, 0, 256, 256)
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fp = BytesIO(b"PILfont\n\nDATA\n" + glyph * 256)
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font = ImageFont.ImageFont()
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font._load_pilfont_data(fp, Image.new("L", (256, 256)))
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with pytest.raises(Image.DecompressionBombError):
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font.getmask("A" * 1_000_000)
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@timeout_unless_slower_valgrind(4)
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def test_oom() -> None:
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glyph = struct.pack(
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">hhhhhhhhhh", 1, 0, -32767, -32767, 32767, 32767, -32767, -32767, 32767, 32767
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)
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fp = BytesIO(b"PILfont\n\nDATA\n" + glyph * 256)
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font = ImageFont.ImageFont()
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font._load_pilfont_data(fp, Image.new("L", (1, 1)))
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font.getmask("A" * 1_000_000)
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