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https://github.com/python-pillow/Pillow.git
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437 lines
16 KiB
Python
437 lines
16 KiB
Python
from helper import unittest, PillowTestCase
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from PIL import Image
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from PIL import ImageDraw
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from io import BytesIO
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import os
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import sys
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import copy
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FONT_PATH = "Tests/fonts/FreeMono.ttf"
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FONT_SIZE = 20
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TEST_TEXT = "hey you\nyou are awesome\nthis looks awkward"
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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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class SimplePatcher(object):
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def __init__(self, parent_obj, attr_name, value):
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self._parent_obj = parent_obj
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self._attr_name = attr_name
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self._saved = None
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self._is_saved = False
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self._value = value
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def __enter__(self):
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# Patch the attr on the object
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if hasattr(self._parent_obj, self._attr_name):
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self._saved = getattr(self._parent_obj, self._attr_name)
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setattr(self._parent_obj, self._attr_name, self._value)
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self._is_saved = True
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else:
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setattr(self._parent_obj, self._attr_name, self._value)
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self._is_saved = False
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def __exit__(self, type, value, traceback):
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# Restore the original value
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if self._is_saved:
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setattr(self._parent_obj, self._attr_name, self._saved)
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else:
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delattr(self._parent_obj, self._attr_name)
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class TestImageFont(PillowTestCase):
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def test_sanity(self):
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self.assertRegexpMatches(
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ImageFont.core.freetype2_version, "\d+\.\d+\.\d+$")
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def test_font_properties(self):
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ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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self.assertEqual(ttf.path, FONT_PATH)
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self.assertEqual(ttf.size, FONT_SIZE)
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ttf_copy = ttf.font_variant()
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self.assertEqual(ttf_copy.path, FONT_PATH)
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self.assertEqual(ttf_copy.size, FONT_SIZE)
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ttf_copy = ttf.font_variant(size=FONT_SIZE+1)
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self.assertEqual(ttf_copy.size, FONT_SIZE+1)
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second_font_path = "Tests/fonts/DejaVuSans.ttf"
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ttf_copy = ttf.font_variant(font=second_font_path)
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self.assertEqual(ttf_copy.path, second_font_path)
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def test_font_with_name(self):
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ImageFont.truetype(FONT_PATH, FONT_SIZE)
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self._render(FONT_PATH)
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self._clean()
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def _font_as_bytes(self):
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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(self):
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ImageFont.truetype(self._font_as_bytes(), FONT_SIZE)
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self._render(self._font_as_bytes())
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# Usage note: making two fonts from the same buffer fails.
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# shared_bytes = self._font_as_bytes()
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# self._render(shared_bytes)
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# self.assertRaises(Exception, lambda: _render(shared_bytes))
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self._clean()
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def test_font_with_open_file(self):
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with open(FONT_PATH, 'rb') as f:
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self._render(f)
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self._clean()
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def _render(self, font):
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txt = "Hello World!"
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ttf = ImageFont.truetype(font, FONT_SIZE)
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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(self):
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os.unlink('font.png')
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def test_render_equal(self):
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img_path = self._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 = self._render(font_filelike)
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self.assert_image_equal(img_path, img_filelike)
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self._clean()
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def test_textsize_equal(self):
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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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txt = "Hello World!"
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size = draw.textsize(txt, ttf)
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draw.text((10, 10), txt, font=ttf)
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draw.rectangle((10, 10, 10 + size[0], 10 + size[1]))
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target = 'Tests/images/rectangle_surrounding_text.png'
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target_img = Image.open(target)
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self.assert_image_similar(im, target_img, .5)
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def test_render_multiline(self):
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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] + 4
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lines = TEST_TEXT.split("\n")
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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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self.assert_image_similar(im, target_img, .5)
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def test_render_multiline_text(self):
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ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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# Test that text() correctly connects to multiline_text()
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# and that align defaults to left
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im = Image.new(mode='RGB', size=(300, 100))
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draw = ImageDraw.Draw(im)
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draw.text((0, 0), TEST_TEXT, font=ttf)
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target = 'Tests/images/multiline_text.png'
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target_img = Image.open(target)
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self.assert_image_similar(im, target_img, .5)
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# Test align center and right
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for align, ext in {"center": "_center",
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"right": "_right"}.items():
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im = Image.new(mode='RGB', size=(300, 100))
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draw = ImageDraw.Draw(im)
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draw.multiline_text((0, 0), TEST_TEXT, font=ttf, align=align)
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target = 'Tests/images/multiline_text'+ext+'.png'
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target_img = Image.open(target)
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self.assert_image_similar(im, target_img, .5)
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def test_unknown_align(self):
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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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# Act/Assert
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self.assertRaises(AssertionError,
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lambda: draw.multiline_text((0, 0), TEST_TEXT,
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font=ttf,
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align="unknown"))
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def test_multiline_size(self):
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ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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im = Image.new(mode='RGB', size=(300, 100))
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draw = ImageDraw.Draw(im)
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# Test that textsize() correctly connects to multiline_textsize()
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self.assertEqual(draw.textsize(TEST_TEXT, font=ttf),
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draw.multiline_textsize(TEST_TEXT, font=ttf))
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def test_multiline_width(self):
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ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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im = Image.new(mode='RGB', size=(300, 100))
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draw = ImageDraw.Draw(im)
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self.assertEqual(draw.textsize("longest line", font=ttf)[0],
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draw.multiline_textsize("longest line\nline",
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font=ttf)[0])
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def test_multiline_spacing(self):
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ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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im = Image.new(mode='RGB', size=(300, 100))
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draw = ImageDraw.Draw(im)
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draw.multiline_text((0, 0), TEST_TEXT, font=ttf, spacing=10)
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target = 'Tests/images/multiline_text_spacing.png'
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target_img = Image.open(target)
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self.assert_image_similar(im, target_img, .5)
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def test_rotated_transposed_font(self):
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img_grey = Image.new("L", (100, 100))
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draw = ImageDraw.Draw(img_grey)
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word = "testing"
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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orientation = Image.ROTATE_90
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transposed_font = ImageFont.TransposedFont(
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font, orientation=orientation)
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# Original font
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draw.font = font
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box_size_a = draw.textsize(word)
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# Rotated font
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draw.font = transposed_font
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box_size_b = draw.textsize(word)
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# Check (w,h) of box a is (h,w) of box b
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self.assertEqual(box_size_a[0], box_size_b[1])
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self.assertEqual(box_size_a[1], box_size_b[0])
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def test_unrotated_transposed_font(self):
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img_grey = Image.new("L", (100, 100))
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draw = ImageDraw.Draw(img_grey)
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word = "testing"
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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orientation = None
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transposed_font = ImageFont.TransposedFont(
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font, orientation=orientation)
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# Original font
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draw.font = font
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box_size_a = draw.textsize(word)
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# Rotated font
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draw.font = transposed_font
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box_size_b = draw.textsize(word)
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# Check boxes a and b are same size
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self.assertEqual(box_size_a, box_size_b)
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def test_rotated_transposed_font_get_mask(self):
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# Arrange
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text = "mask this"
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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orientation = Image.ROTATE_90
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transposed_font = ImageFont.TransposedFont(
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font, orientation=orientation)
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# Act
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mask = transposed_font.getmask(text)
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# Assert
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self.assertEqual(mask.size, (13, 108))
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def test_unrotated_transposed_font_get_mask(self):
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# Arrange
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text = "mask this"
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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orientation = None
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transposed_font = ImageFont.TransposedFont(
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font, orientation=orientation)
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# Act
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mask = transposed_font.getmask(text)
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# Assert
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self.assertEqual(mask.size, (108, 13))
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def test_free_type_font_get_name(self):
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# Arrange
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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# Act
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name = font.getname()
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# Assert
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self.assertEqual(('FreeMono', 'Regular'), name)
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def test_free_type_font_get_metrics(self):
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# Arrange
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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# Act
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ascent, descent = font.getmetrics()
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# Assert
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self.assertIsInstance(ascent, int)
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self.assertIsInstance(descent, int)
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self.assertEqual((ascent, descent), (16, 4)) # too exact check?
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def test_free_type_font_get_offset(self):
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# Arrange
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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text = "offset this"
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# Act
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offset = font.getoffset(text)
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# Assert
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self.assertEqual(offset, (0, 3))
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def test_free_type_font_get_mask(self):
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# Arrange
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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text = "mask this"
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# Act
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mask = font.getmask(text)
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# Assert
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self.assertEqual(mask.size, (108, 13))
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def test_load_path_not_found(self):
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# Arrange
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filename = "somefilenamethatdoesntexist.ttf"
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# Act/Assert
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self.assertRaises(IOError, lambda: ImageFont.load_path(filename))
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def test_default_font(self):
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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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target = 'Tests/images/default_font.png'
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target_img = Image.open(target)
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# Act
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default_font = ImageFont.load_default()
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draw.text((10, 10), txt, font=default_font)
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# Assert
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self.assert_image_equal(im, target_img)
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def _test_fake_loading_font(self, path_to_fake, fontname):
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# Make a copy of FreeTypeFont so we can patch the original
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free_type_font = copy.deepcopy(ImageFont.FreeTypeFont)
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with SimplePatcher(ImageFont, '_FreeTypeFont', free_type_font):
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def loadable_font(filepath, size, index, encoding):
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if filepath == path_to_fake:
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return ImageFont._FreeTypeFont(FONT_PATH, size, index,
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encoding)
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return ImageFont._FreeTypeFont(filepath, size, index,
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encoding)
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with SimplePatcher(ImageFont, 'FreeTypeFont', loadable_font):
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font = ImageFont.truetype(fontname)
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# Make sure it's loaded
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name = font.getname()
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self.assertEqual(('FreeMono', 'Regular'), name)
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@unittest.skipIf(sys.platform.startswith('win32'),
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"requires Unix or MacOS")
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def test_find_linux_font(self):
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# A lot of mocking here - this is more for hitting code and
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# catching syntax like errors
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font_directory = '/usr/local/share/fonts'
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with SimplePatcher(sys, 'platform', 'linux'):
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patched_env = copy.deepcopy(os.environ)
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patched_env['XDG_DATA_DIRS'] = '/usr/share/:/usr/local/share/'
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with SimplePatcher(os, 'environ', patched_env):
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def fake_walker(path):
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if path == font_directory:
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return [(path, [], [
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'Arial.ttf', 'Single.otf', 'Duplicate.otf',
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'Duplicate.ttf'], )]
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return [(path, [], ['some_random_font.ttf'], )]
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with SimplePatcher(os, 'walk', fake_walker):
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# Test that the font loads both with and without the
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# extension
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self._test_fake_loading_font(
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font_directory+'/Arial.ttf', 'Arial.ttf')
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self._test_fake_loading_font(
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font_directory+'/Arial.ttf', 'Arial')
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# Test that non-ttf fonts can be found without the
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# extension
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self._test_fake_loading_font(
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font_directory+'/Single.otf', 'Single')
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# Test that ttf fonts are preferred if the extension is
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# not specified
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self._test_fake_loading_font(
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font_directory+'/Duplicate.ttf', 'Duplicate')
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@unittest.skipIf(sys.platform.startswith('win32'),
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"requires Unix or MacOS")
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def test_find_osx_font(self):
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# Like the linux test, more cover hitting code rather than testing
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# correctness.
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font_directory = '/System/Library/Fonts'
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with SimplePatcher(sys, 'platform', 'darwin'):
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def fake_walker(path):
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if path == font_directory:
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return [(path, [],
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['Arial.ttf', 'Single.otf',
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'Duplicate.otf', 'Duplicate.ttf'], )]
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return [(path, [], ['some_random_font.ttf'], )]
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with SimplePatcher(os, 'walk', fake_walker):
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self._test_fake_loading_font(
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font_directory+'/Arial.ttf', 'Arial.ttf')
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self._test_fake_loading_font(
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font_directory+'/Arial.ttf', 'Arial')
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self._test_fake_loading_font(
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font_directory+'/Single.otf', 'Single')
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self._test_fake_loading_font(
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font_directory+'/Duplicate.ttf', 'Duplicate')
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except ImportError:
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class TestImageFont(PillowTestCase):
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def test_skip(self):
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self.skipTest("ImportError")
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if __name__ == '__main__':
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unittest.main()
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# End of file
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