import copy import distutils.version import os import re import shutil import sys from io import BytesIO import pytest from PIL import Image, ImageDraw, ImageFont, features from .helper import ( assert_image_equal, assert_image_equal_tofile, assert_image_similar, assert_image_similar_tofile, is_pypy, is_win32, skip_unless_feature, ) FONT_PATH = "Tests/fonts/FreeMono.ttf" FONT_SIZE = 20 TEST_TEXT = "hey you\nyou are awesome\nthis looks awkward" pytestmark = skip_unless_feature("freetype2") class TestImageFont: LAYOUT_ENGINE = ImageFont.LAYOUT_BASIC # Freetype has different metrics depending on the version. # (and, other things, but first things first) METRICS = { (">=2.3", "<2.4"): {"multiline": 30, "textsize": 12, "getters": (13, 16)}, (">=2.7",): {"multiline": 6.2, "textsize": 2.5, "getters": (12, 16)}, "Default": {"multiline": 0.5, "textsize": 0.5, "getters": (12, 16)}, } @classmethod def setup_class(self): freetype = distutils.version.StrictVersion(features.version_module("freetype2")) self.metrics = self.METRICS["Default"] for conditions, metrics in self.METRICS.items(): if not isinstance(conditions, tuple): continue for condition in conditions: version = re.sub("[<=>]", "", condition) if (condition.startswith(">=") and freetype >= version) or ( condition.startswith("<") and freetype < version ): # Condition was met continue # Condition failed break else: # All conditions were met self.metrics = metrics def get_font(self): return ImageFont.truetype( FONT_PATH, FONT_SIZE, layout_engine=self.LAYOUT_ENGINE ) def test_sanity(self): assert re.search(r"\d+\.\d+\.\d+$", features.version_module("freetype2")) def test_font_properties(self): ttf = self.get_font() assert ttf.path == FONT_PATH assert ttf.size == FONT_SIZE ttf_copy = ttf.font_variant() assert ttf_copy.path == FONT_PATH assert ttf_copy.size == FONT_SIZE ttf_copy = ttf.font_variant(size=FONT_SIZE + 1) assert ttf_copy.size == FONT_SIZE + 1 second_font_path = "Tests/fonts/DejaVuSans.ttf" ttf_copy = ttf.font_variant(font=second_font_path) assert ttf_copy.path == second_font_path def test_font_with_name(self): self.get_font() self._render(FONT_PATH) 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, layout_engine=self.LAYOUT_ENGINE ) 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) # with pytest.raises(Exception): # _render(shared_bytes) def test_font_with_open_file(self): with open(FONT_PATH, "rb") as f: self._render(f) def test_non_unicode_path(self, tmp_path): tempfile = str(tmp_path / ("temp_" + chr(128) + ".ttf")) try: shutil.copy(FONT_PATH, tempfile) except UnicodeEncodeError: pytest.skip("Unicode path could not be created") ImageFont.truetype(tempfile, FONT_SIZE) def test_unavailable_layout_engine(self): have_raqm = ImageFont.core.HAVE_RAQM ImageFont.core.HAVE_RAQM = False try: ttf = ImageFont.truetype( FONT_PATH, FONT_SIZE, layout_engine=ImageFont.LAYOUT_RAQM ) finally: ImageFont.core.HAVE_RAQM = have_raqm assert ttf.layout_engine == ImageFont.LAYOUT_BASIC def _render(self, font): txt = "Hello World!" ttf = ImageFont.truetype(font, FONT_SIZE, layout_engine=self.LAYOUT_ENGINE) ttf.getsize(txt) img = Image.new("RGB", (256, 64), "white") d = ImageDraw.Draw(img) d.text((10, 10), txt, font=ttf, fill="black") return img 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) assert_image_equal(img_path, img_filelike) def test_transparent_background(self): im = Image.new(mode="RGBA", size=(300, 100)) draw = ImageDraw.Draw(im) ttf = self.get_font() txt = "Hello World!" draw.text((10, 10), txt, font=ttf) target = "Tests/images/transparent_background_text.png" with Image.open(target) as target_img: assert_image_similar(im, target_img, 4.09) def test_textsize_equal(self): im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) ttf = self.get_font() 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" with Image.open(target) as target_img: # Epsilon ~.5 fails with FreeType 2.7 assert_image_similar(im, target_img, self.metrics["textsize"]) def test_render_multiline(self): im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) ttf = self.get_font() line_spacing = draw.textsize("A", font=ttf)[1] + 4 lines = TEST_TEXT.split("\n") y = 0 for line in lines: draw.text((0, y), line, font=ttf) y += line_spacing target = "Tests/images/multiline_text.png" with Image.open(target) as target_img: # some versions of freetype have different horizontal spacing. # setting a tight epsilon, I'm showing the original test failure # at epsilon = ~38. assert_image_similar(im, target_img, self.metrics["multiline"]) def test_render_multiline_text(self): ttf = self.get_font() # Test that text() correctly connects to multiline_text() # and that align defaults to left im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) draw.text((0, 0), TEST_TEXT, font=ttf) target = "Tests/images/multiline_text.png" with Image.open(target) as target_img: # Epsilon ~.5 fails with FreeType 2.7 assert_image_similar(im, target_img, self.metrics["multiline"]) # Test that text() can pass on additional arguments # to multiline_text() draw.text( (0, 0), TEST_TEXT, fill=None, font=ttf, anchor=None, spacing=4, align="left" ) draw.text((0, 0), TEST_TEXT, None, ttf, None, 4, "left") # Test align center and right for align, ext in {"center": "_center", "right": "_right"}.items(): im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) draw.multiline_text((0, 0), TEST_TEXT, font=ttf, align=align) target = "Tests/images/multiline_text" + ext + ".png" with Image.open(target) as target_img: # Epsilon ~.5 fails with FreeType 2.7 assert_image_similar(im, target_img, self.metrics["multiline"]) def test_unknown_align(self): im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) ttf = self.get_font() # Act/Assert with pytest.raises(ValueError): draw.multiline_text((0, 0), TEST_TEXT, font=ttf, align="unknown") def test_draw_align(self): im = Image.new("RGB", (300, 100), "white") draw = ImageDraw.Draw(im) ttf = self.get_font() line = "some text" draw.text((100, 40), line, (0, 0, 0), font=ttf, align="left") def test_multiline_size(self): ttf = self.get_font() im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) # Test that textsize() correctly connects to multiline_textsize() assert draw.textsize(TEST_TEXT, font=ttf) == draw.multiline_textsize( TEST_TEXT, font=ttf ) # Test that multiline_textsize corresponds to ImageFont.textsize() # for single line text assert ttf.getsize("A") == draw.multiline_textsize("A", font=ttf) # Test that textsize() can pass on additional arguments # to multiline_textsize() draw.textsize(TEST_TEXT, font=ttf, spacing=4) draw.textsize(TEST_TEXT, ttf, 4) def test_multiline_width(self): ttf = self.get_font() im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) assert ( draw.textsize("longest line", font=ttf)[0] == draw.multiline_textsize("longest line\nline", font=ttf)[0] ) def test_multiline_spacing(self): ttf = self.get_font() im = Image.new(mode="RGB", size=(300, 100)) draw = ImageDraw.Draw(im) draw.multiline_text((0, 0), TEST_TEXT, font=ttf, spacing=10) target = "Tests/images/multiline_text_spacing.png" with Image.open(target) as target_img: # Epsilon ~.5 fails with FreeType 2.7 assert_image_similar(im, target_img, self.metrics["multiline"]) def test_rotated_transposed_font(self): img_grey = Image.new("L", (100, 100)) draw = ImageDraw.Draw(img_grey) word = "testing" font = self.get_font() orientation = Image.ROTATE_90 transposed_font = ImageFont.TransposedFont(font, orientation=orientation) # Original font draw.font = font box_size_a = draw.textsize(word) # Rotated font draw.font = transposed_font box_size_b = draw.textsize(word) # Check (w,h) of box a is (h,w) of box b assert box_size_a[0] == box_size_b[1] assert 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 = self.get_font() orientation = None transposed_font = ImageFont.TransposedFont(font, orientation=orientation) # Original font draw.font = font box_size_a = draw.textsize(word) # Rotated font draw.font = transposed_font box_size_b = draw.textsize(word) # Check boxes a and b are same size assert box_size_a == box_size_b def test_rotated_transposed_font_get_mask(self): # Arrange text = "mask this" font = self.get_font() orientation = Image.ROTATE_90 transposed_font = ImageFont.TransposedFont(font, orientation=orientation) # Act mask = transposed_font.getmask(text) # Assert assert mask.size == (13, 108) def test_unrotated_transposed_font_get_mask(self): # Arrange text = "mask this" font = self.get_font() orientation = None transposed_font = ImageFont.TransposedFont(font, orientation=orientation) # Act mask = transposed_font.getmask(text) # Assert assert mask.size == (108, 13) def test_free_type_font_get_name(self): # Arrange font = self.get_font() # Act name = font.getname() # Assert assert ("FreeMono", "Regular") == name def test_free_type_font_get_metrics(self): # Arrange font = self.get_font() # Act ascent, descent = font.getmetrics() # Assert assert isinstance(ascent, int) assert isinstance(descent, int) assert (ascent, descent) == (16, 4) # too exact check? def test_free_type_font_get_offset(self): # Arrange font = self.get_font() text = "offset this" # Act offset = font.getoffset(text) # Assert assert offset == (0, 3) def test_free_type_font_get_mask(self): # Arrange font = self.get_font() text = "mask this" # Act mask = font.getmask(text) # Assert assert mask.size == (108, 13) def test_load_path_not_found(self): # Arrange filename = "somefilenamethatdoesntexist.ttf" # Act/Assert with pytest.raises(OSError): ImageFont.load_path(filename) with pytest.raises(OSError): ImageFont.truetype(filename) def test_load_non_font_bytes(self): with open("Tests/images/hopper.jpg", "rb") as f: with pytest.raises(OSError): ImageFont.truetype(f) 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" with Image.open(target) as target_img: # Act default_font = ImageFont.load_default() draw.text((10, 10), txt, font=default_font) # Assert assert_image_equal(im, target_img) def test_getsize_empty(self): # issue #2614 font = self.get_font() # should not crash. assert (0, 0) == font.getsize("") def test_render_empty(self): # issue 2666 font = self.get_font() im = Image.new(mode="RGB", size=(300, 100)) target = im.copy() draw = ImageDraw.Draw(im) # should not crash here. draw.text((10, 10), "", font=font) assert_image_equal(im, target) def test_unicode_pilfont(self): # should not segfault, should return UnicodeDecodeError # issue #2826 font = ImageFont.load_default() with pytest.raises(UnicodeEncodeError): font.getsize("’") @pytest.mark.xfail(is_pypy(), reason="failing on PyPy with Raqm") def test_unicode_extended(self): # issue #3777 text = "A\u278A\U0001F12B" target = "Tests/images/unicode_extended.png" ttf = ImageFont.truetype( "Tests/fonts/NotoSansSymbols-Regular.ttf", FONT_SIZE, layout_engine=self.LAYOUT_ENGINE, ) img = Image.new("RGB", (100, 60)) d = ImageDraw.Draw(img) d.text((10, 10), text, font=ttf) assert_image_similar_tofile(img, target, self.metrics["multiline"]) def _test_fake_loading_font(self, monkeypatch, path_to_fake, fontname): # Make a copy of FreeTypeFont so we can patch the original free_type_font = copy.deepcopy(ImageFont.FreeTypeFont) with monkeypatch.context() as m: m.setattr(ImageFont, "_FreeTypeFont", free_type_font, raising=False) def loadable_font(filepath, size, index, encoding, *args, **kwargs): if filepath == path_to_fake: return ImageFont._FreeTypeFont( FONT_PATH, size, index, encoding, *args, **kwargs ) return ImageFont._FreeTypeFont( filepath, size, index, encoding, *args, **kwargs ) m.setattr(ImageFont, "FreeTypeFont", loadable_font) font = ImageFont.truetype(fontname) # Make sure it's loaded name = font.getname() assert ("FreeMono", "Regular") == name @pytest.mark.skipif(is_win32(), reason="requires Unix or macOS") def test_find_linux_font(self, monkeypatch): # A lot of mocking here - this is more for hitting code and # catching syntax like errors font_directory = "/usr/local/share/fonts" monkeypatch.setattr(sys, "platform", "linux") monkeypatch.setenv("XDG_DATA_DIRS", "/usr/share/:/usr/local/share/") def fake_walker(path): if path == font_directory: return [ ( path, [], ["Arial.ttf", "Single.otf", "Duplicate.otf", "Duplicate.ttf"], ) ] return [(path, [], ["some_random_font.ttf"])] monkeypatch.setattr(os, "walk", fake_walker) # Test that the font loads both with and without the # extension self._test_fake_loading_font( monkeypatch, font_directory + "/Arial.ttf", "Arial.ttf" ) self._test_fake_loading_font( monkeypatch, font_directory + "/Arial.ttf", "Arial" ) # Test that non-ttf fonts can be found without the # extension self._test_fake_loading_font( monkeypatch, font_directory + "/Single.otf", "Single" ) # Test that ttf fonts are preferred if the extension is # not specified self._test_fake_loading_font( monkeypatch, font_directory + "/Duplicate.ttf", "Duplicate" ) @pytest.mark.skipif(is_win32(), reason="requires Unix or macOS") def test_find_macos_font(self, monkeypatch): # Like the linux test, more cover hitting code rather than testing # correctness. font_directory = "/System/Library/Fonts" monkeypatch.setattr(sys, "platform", "darwin") def fake_walker(path): if path == font_directory: return [ ( path, [], ["Arial.ttf", "Single.otf", "Duplicate.otf", "Duplicate.ttf"], ) ] return [(path, [], ["some_random_font.ttf"])] monkeypatch.setattr(os, "walk", fake_walker) self._test_fake_loading_font( monkeypatch, font_directory + "/Arial.ttf", "Arial.ttf" ) self._test_fake_loading_font( monkeypatch, font_directory + "/Arial.ttf", "Arial" ) self._test_fake_loading_font( monkeypatch, font_directory + "/Single.otf", "Single" ) self._test_fake_loading_font( monkeypatch, font_directory + "/Duplicate.ttf", "Duplicate" ) def test_imagefont_getters(self): # Arrange t = self.get_font() # Act / Assert assert t.getmetrics() == (16, 4) assert t.font.ascent == 16 assert t.font.descent == 4 assert t.font.height == 20 assert t.font.x_ppem == 20 assert t.font.y_ppem == 20 assert t.font.glyphs == 4177 assert t.getsize("A") == (12, 16) assert t.getsize("AB") == (24, 16) assert t.getsize("M") == self.metrics["getters"] assert t.getsize("y") == (12, 20) assert t.getsize("a") == (12, 16) assert t.getsize_multiline("A") == (12, 16) assert t.getsize_multiline("AB") == (24, 16) assert t.getsize_multiline("a") == (12, 16) assert t.getsize_multiline("ABC\n") == (36, 36) assert t.getsize_multiline("ABC\nA") == (36, 36) assert t.getsize_multiline("ABC\nAaaa") == (48, 36) def test_getsize_stroke(self): # Arrange t = self.get_font() # Act / Assert for stroke_width in [0, 2]: assert t.getsize("A", stroke_width=stroke_width) == ( 12 + stroke_width * 2, 16 + stroke_width * 2, ) assert t.getsize_multiline("ABC\nAaaa", stroke_width=stroke_width) == ( 48 + stroke_width * 2, 36 + stroke_width * 4, ) def test_complex_font_settings(self): # Arrange t = self.get_font() # Act / Assert if t.layout_engine == ImageFont.LAYOUT_BASIC: with pytest.raises(KeyError): t.getmask("абвг", direction="rtl") with pytest.raises(KeyError): t.getmask("абвг", features=["-kern"]) with pytest.raises(KeyError): t.getmask("абвг", language="sr") def test_variation_get(self): font = self.get_font() freetype = distutils.version.StrictVersion(features.version_module("freetype2")) if freetype < "2.9.1": with pytest.raises(NotImplementedError): font.get_variation_names() with pytest.raises(NotImplementedError): font.get_variation_axes() return with pytest.raises(OSError): font.get_variation_names() with pytest.raises(OSError): font.get_variation_axes() font = ImageFont.truetype("Tests/fonts/AdobeVFPrototype.ttf") assert font.get_variation_names(), [ b"ExtraLight", b"Light", b"Regular", b"Semibold", b"Bold", b"Black", b"Black Medium Contrast", b"Black High Contrast", b"Default", ] assert font.get_variation_axes() == [ {"name": b"Weight", "minimum": 200, "maximum": 900, "default": 389}, {"name": b"Contrast", "minimum": 0, "maximum": 100, "default": 0}, ] font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf") assert font.get_variation_names() == [ b"20", b"40", b"60", b"80", b"100", b"120", b"140", b"160", b"180", b"200", b"220", b"240", b"260", b"280", b"300", b"Regular", ] assert font.get_variation_axes() == [ {"name": b"Size", "minimum": 0, "maximum": 300, "default": 0} ] def _check_text(self, font, path, epsilon): im = Image.new("RGB", (100, 75), "white") d = ImageDraw.Draw(im) d.text((10, 10), "Text", font=font, fill="black") try: with Image.open(path) as expected: assert_image_similar(im, expected, epsilon) except AssertionError: if "_adobe" in path: path = path.replace("_adobe", "_adobe_older_harfbuzz") with Image.open(path) as expected: assert_image_similar(im, expected, epsilon) else: raise def test_variation_set_by_name(self): font = self.get_font() freetype = distutils.version.StrictVersion(features.version_module("freetype2")) if freetype < "2.9.1": with pytest.raises(NotImplementedError): font.set_variation_by_name("Bold") return with pytest.raises(OSError): font.set_variation_by_name("Bold") font = ImageFont.truetype("Tests/fonts/AdobeVFPrototype.ttf", 36) self._check_text(font, "Tests/images/variation_adobe.png", 11) for name in ["Bold", b"Bold"]: font.set_variation_by_name(name) self._check_text(font, "Tests/images/variation_adobe_name.png", 11) font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf", 36) self._check_text(font, "Tests/images/variation_tiny.png", 40) for name in ["200", b"200"]: font.set_variation_by_name(name) self._check_text(font, "Tests/images/variation_tiny_name.png", 40) def test_variation_set_by_axes(self): font = self.get_font() freetype = distutils.version.StrictVersion(features.version_module("freetype2")) if freetype < "2.9.1": with pytest.raises(NotImplementedError): font.set_variation_by_axes([100]) return with pytest.raises(OSError): font.set_variation_by_axes([500, 50]) font = ImageFont.truetype("Tests/fonts/AdobeVFPrototype.ttf", 36) font.set_variation_by_axes([500, 50]) self._check_text(font, "Tests/images/variation_adobe_axes.png", 5.1) font = ImageFont.truetype("Tests/fonts/TINY5x3GX.ttf", 36) font.set_variation_by_axes([100]) self._check_text(font, "Tests/images/variation_tiny_axes.png", 32.5) @skip_unless_feature("raqm") class TestImageFont_RaqmLayout(TestImageFont): LAYOUT_ENGINE = ImageFont.LAYOUT_RAQM def test_render_mono_size(): # issue 4177 if distutils.version.StrictVersion(ImageFont.core.freetype2_version) < "2.4": pytest.skip("Different metrics") im = Image.new("P", (100, 30), "white") draw = ImageDraw.Draw(im) ttf = ImageFont.truetype( "Tests/fonts/DejaVuSans.ttf", 18, layout_engine=ImageFont.LAYOUT_BASIC ) draw.text((10, 10), "r" * 10, "black", ttf) assert_image_equal_tofile(im, "Tests/images/text_mono.gif")