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93 lines
2.5 KiB
Python
93 lines
2.5 KiB
Python
from tester import *
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from PIL import Image
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from io import BytesIO
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import os
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try:
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from PIL import ImageFont
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ImageFont.core.getfont # check if freetype is available
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except ImportError:
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skip()
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from PIL import ImageDraw
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font_path = "Tests/fonts/FreeMono.ttf"
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font_size=20
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def test_sanity():
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assert_match(ImageFont.core.freetype2_version, "\d+\.\d+\.\d+$")
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def test_font_with_name():
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assert_no_exception(lambda: ImageFont.truetype(font_path, font_size))
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assert_no_exception(lambda: _render(font_path))
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_clean()
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def _font_as_bytes():
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with open(font_path, 'rb') as f:
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font_bytes = BytesIO(f.read())
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return font_bytes
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def test_font_with_filelike():
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assert_no_exception(lambda: ImageFont.truetype(_font_as_bytes(), font_size))
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assert_no_exception(lambda: _render(_font_as_bytes()))
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# Usage note: making two fonts from the same buffer fails.
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#shared_bytes = _font_as_bytes()
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#assert_no_exception(lambda: _render(shared_bytes))
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#assert_exception(Exception, lambda: _render(shared_bytes))
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_clean()
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def test_font_with_open_file():
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with open(font_path, 'rb') as f:
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assert_no_exception(lambda: _render(f))
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_clean()
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def test_font_old_parameters():
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assert_warning(DeprecationWarning, lambda: ImageFont.truetype(filename=font_path, size=font_size))
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def _render(font):
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txt = "Hello World!"
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ttf = ImageFont.truetype(font, font_size)
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w, h = ttf.getsize(txt)
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img = Image.new("RGB", (256, 64), "white")
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d = ImageDraw.Draw(img)
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d.text((10, 10), txt, font=ttf, fill='black')
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img.save('font.png')
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return img
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def _clean():
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os.unlink('font.png')
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def test_render_equal():
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img_path = _render(font_path)
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with open(font_path, 'rb') as f:
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font_filelike = BytesIO(f.read())
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img_filelike = _render(font_filelike)
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assert_image_equal(img_path, img_filelike)
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_clean()
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def test_render_multiline():
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im = Image.new(mode='RGB', size=(300,100))
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draw = ImageDraw.Draw(im)
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ttf = ImageFont.truetype(font_path, font_size)
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line_spacing = draw.textsize('A', font=ttf)[1] + 8
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lines = ['hey you', 'you are awesome', 'this looks awkward']
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y = 0
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for line in lines:
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draw.text((0, y), line, font=ttf)
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y += line_spacing
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target = 'Tests/images/multiline_text.png'
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target_img = Image.open(target)
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# some versions of freetype have different horizontal spacing.
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# setting a tight epsilon, I'm showing the original test failure
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# at epsilon = ~38.
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assert_image_similar(im, target_img,.5)
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