forked from python-pillow/Pillow
-
Notifications
You must be signed in to change notification settings - Fork 2
/
test_imagefont.py
285 lines (227 loc) · 10.4 KB
/
test_imagefont.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
from helper import unittest, PillowTestCase
from PIL import Image
from PIL import ImageDraw
from io import BytesIO
import os
import sys
import copy
FONT_PATH = "Tests/fonts/FreeMono.ttf"
FONT_SIZE = 20
try:
from PIL import ImageFont
ImageFont.core.getfont # check if freetype is available
class SimplePatcher():
def __init__(self, parent_obj, attr_name, value):
self._parent_obj = parent_obj
self._attr_name = attr_name
self._saved = None
self._is_saved = False
self._value = value
def __enter__(self):
# Patch the attr on the object
if hasattr(self._parent_obj, self._attr_name):
self._saved = getattr(self._parent_obj, self._attr_name)
setattr(self._parent_obj, self._attr_name, self._value)
self._is_saved = True
else:
setattr(self._parent_obj, self._attr_name, self._value)
self._is_saved = False
def __exit__(self, type, value, traceback):
# Restore the original value
if self._is_saved:
setattr(self._parent_obj, self._attr_name, self._saved)
else:
delattr(self._parent_obj, self._attr_name)
class TestImageFont(PillowTestCase):
def test_sanity(self):
self.assertRegexpMatches(
ImageFont.core.freetype2_version, "\d+\.\d+\.\d+$")
def test_font_properties(self):
ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
self.assertEqual(ttf.path, FONT_PATH)
self.assertEqual(ttf.size, FONT_SIZE)
ttf_copy = ttf.font_variant()
self.assertEqual(ttf_copy.path, FONT_PATH)
self.assertEqual(ttf_copy.size, FONT_SIZE)
ttf_copy = ttf.font_variant(size=FONT_SIZE+1)
self.assertEqual(ttf_copy.size, FONT_SIZE+1)
second_font_path = "Tests/fonts/DejaVuSans.ttf"
ttf_copy = ttf.font_variant(font=second_font_path)
self.assertEqual(ttf_copy.path, second_font_path)
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_textsize_equal(self):
im = Image.new(mode='RGB', size=(300, 100))
draw = ImageDraw.Draw(im)
ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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]))
target = 'Tests/images/rectangle_surrounding_text.png'
target_img = Image.open(target)
self.assert_image_equal(im, target_img)
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] + 4
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)
def test_free_type_font_get_name(self):
# Arrange
font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
# Act
name = font.getname()
# Assert
self.assertEqual(('FreeMono', 'Regular'), name)
def test_free_type_font_get_metrics(self):
# Arrange
font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
# Act
ascent, descent = font.getmetrics()
# Assert
self.assertIsInstance(ascent, int)
self.assertIsInstance(descent, int)
self.assertEqual((ascent, descent), (16, 4)) # too exact check?
def test_load_path_not_found(self):
# Arrange
filename = "somefilenamethatdoesntexist.ttf"
# Act/Assert
self.assertRaises(IOError, lambda: ImageFont.load_path(filename))
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)
target = 'Tests/images/default_font.png'
target_img = Image.open(target)
# Act
default_font = ImageFont.load_default()
draw.text((10, 10), txt, font=default_font)
# Assert
self.assert_image_equal(im, target_img)
def _test_fake_loading_font(self, path_to_fake):
#Make a copy of FreeTypeFont so we can patch the original
free_type_font = copy.deepcopy(ImageFont.FreeTypeFont)
with SimplePatcher(ImageFont, '_FreeTypeFont', free_type_font):
def loadable_font(filepath, size, index, encoding):
if filepath == path_to_fake:
return ImageFont._FreeTypeFont(FONT_PATH, size, index, encoding)
return ImageFont._FreeTypeFont(filepath, size, index, encoding)
with SimplePatcher(ImageFont, 'FreeTypeFont', loadable_font):
font = ImageFont.truetype('Arial')
#Make sure it's loaded
name = font.getname()
self.assertEqual(('FreeMono', 'Regular'), name)
@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
def test_find_linux_font(self):
#A lot of mocking here - this is more for hitting code and catching
#syntax like errors
with SimplePatcher(sys, 'platform', 'linux'):
patched_env = copy.deepcopy(os.environ)
patched_env['XDG_DATA_DIRS'] = '/usr/share/:/usr/local/share/'
with SimplePatcher(os, 'environ', patched_env):
def fake_walker(path):
if path == '/usr/local/share/fonts':
return [(path, [], ['Arial.ttf'], )]
return [(path, [], ['some_random_font.ttf'], )]
with SimplePatcher(os, 'walk', fake_walker):
self._test_fake_loading_font('/usr/local/share/fonts/Arial.ttf')
@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
def test_find_osx_font(self):
#Like the linux test, more cover hitting code rather than testing
#correctness.
with SimplePatcher(sys, 'platform', 'darwin'):
fake_font_path = '/System/Library/Fonts/Arial.ttf'
with SimplePatcher(os.path, 'exists', lambda x: x == fake_font_path):
self._test_fake_loading_font(fake_font_path)
except ImportError:
class TestImageFont(PillowTestCase):
def test_skip(self):
self.skipTest("ImportError")
if __name__ == '__main__':
unittest.main()
# End of file