Pillow/Tests/test_imagefont.py

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from helper import unittest, PillowTestCase
from PIL import Image
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from PIL import ImageDraw
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from io import BytesIO
import os
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font_path = "Tests/fonts/FreeMono.ttf"
font_size = 20
try:
from PIL import ImageFont
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ImageFont.core.getfont # check if freetype is available
class TestImageFont(PillowTestCase):
def test_sanity(self):
self.assertRegexpMatches(
ImageFont.core.freetype2_version, "\d+\.\d+\.\d+$")
def test_font_with_name(self):
ImageFont.truetype(font_path, font_size)
self._render(font_path)
self._clean()
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):
ImageFont.truetype(self._font_as_bytes(), font_size)
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)
# self.assertRaises(Exception, lambda: _render(shared_bytes))
self._clean()
def test_font_with_open_file(self):
with open(font_path, 'rb') as f:
self._render(f)
self._clean()
def test_font_old_parameters(self):
self.assert_warning(
DeprecationWarning,
lambda: ImageFont.truetype(filename=font_path, size=font_size))
def _render(self, font):
txt = "Hello World!"
ttf = ImageFont.truetype(font, font_size)
w, h = ttf.getsize(txt)
img = Image.new("RGB", (256, 64), "white")
d = ImageDraw.Draw(img)
d.text((10, 10), txt, font=ttf, fill='black')
img.save('font.png')
return img
def _clean(self):
os.unlink('font.png')
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)
self.assert_image_equal(img_path, img_filelike)
self._clean()
def test_render_multiline(self):
im = Image.new(mode='RGB', size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = ImageFont.truetype(font_path, font_size)
line_spacing = draw.textsize('A', font=ttf)[1] + 8
lines = ['hey you', 'you are awesome', 'this looks awkward']
y = 0
for line in lines:
draw.text((0, y), line, font=ttf)
y += line_spacing
target = 'Tests/images/multiline_text.png'
target_img = Image.open(target)
# some versions of freetype have different horizontal spacing.
# setting a tight epsilon, I'm showing the original test failure
# at epsilon = ~38.
self.assert_image_similar(im, target_img, .5)
def test_rotated_transposed_font(self):
img_grey = Image.new("L", (100, 100))
draw = ImageDraw.Draw(img_grey)
word = "testing"
font = ImageFont.truetype(font_path, font_size)
orientation = Image.ROTATE_90
transposed_font = ImageFont.TransposedFont(
font, orientation=orientation)
# Original font
draw.setfont(font)
box_size_a = draw.textsize(word)
# Rotated font
draw.setfont(transposed_font)
box_size_b = draw.textsize(word)
# Check (w,h) of box a is (h,w) of box b
self.assertEqual(box_size_a[0], box_size_b[1])
self.assertEqual(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 = ImageFont.truetype(font_path, font_size)
orientation = None
transposed_font = ImageFont.TransposedFont(
font, orientation=orientation)
# Original font
draw.setfont(font)
box_size_a = draw.textsize(word)
# Rotated font
draw.setfont(transposed_font)
box_size_b = draw.textsize(word)
# Check boxes a and b are same size
self.assertEqual(box_size_a, box_size_b)
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except ImportError:
class TestImageFont(PillowTestCase):
def test_skip(self):
self.skipTest("ImportError")
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if __name__ == '__main__':
unittest.main()
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# End of file