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325 lines
11 KiB
Python
325 lines
11 KiB
Python
import pytest
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from packaging.version import parse as parse_version
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from PIL import Image, ImageDraw, ImageFont, features
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from .helper import assert_image_similar, skip_unless_feature
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FONT_SIZE = 20
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FONT_PATH = "Tests/fonts/DejaVuSans.ttf"
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pytestmark = skip_unless_feature("raqm")
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def test_english():
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# smoke test, this should not fail
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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.text((0, 0), "TEST", font=ttf, fill=500, direction="ltr")
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def test_complex_text():
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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.text((0, 0), "اهلا عمان", font=ttf, fill=500)
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target = "Tests/images/test_text.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_y_offset():
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ttf = ImageFont.truetype("Tests/fonts/NotoNastaliqUrdu-Regular.ttf", 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.text((0, 0), "العالم العربي", font=ttf, fill=500)
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target = "Tests/images/test_y_offset.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 1.7)
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def test_complex_unicode_text():
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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.text((0, 0), "السلام عليكم", font=ttf, fill=500)
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target = "Tests/images/test_complex_unicode_text.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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ttf = ImageFont.truetype("Tests/fonts/KhmerOSBattambang-Regular.ttf", 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.text((0, 0), "លោកុប្បត្តិ", font=ttf, fill=500)
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target = "Tests/images/test_complex_unicode_text2.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 2.33)
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def test_text_direction_rtl():
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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.text((0, 0), "English عربي", font=ttf, fill=500, direction="rtl")
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target = "Tests/images/test_direction_rtl.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_text_direction_ltr():
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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.text((0, 0), "سلطنة عمان Oman", font=ttf, fill=500, direction="ltr")
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target = "Tests/images/test_direction_ltr.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_text_direction_rtl2():
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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.text((0, 0), "Oman سلطنة عمان", font=ttf, fill=500, direction="rtl")
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target = "Tests/images/test_direction_ltr.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_text_direction_ttb():
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ttf = ImageFont.truetype("Tests/fonts/NotoSansJP-Regular.otf", FONT_SIZE)
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im = Image.new(mode="RGB", size=(100, 300))
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draw = ImageDraw.Draw(im)
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try:
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draw.text((0, 0), "English あい", font=ttf, fill=500, direction="ttb")
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except ValueError as ex:
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if str(ex) == "libraqm 0.7 or greater required for 'ttb' direction":
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pytest.skip("libraqm 0.7 or greater not available")
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target = "Tests/images/test_direction_ttb.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 1.15)
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def test_text_direction_ttb_stroke():
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ttf = ImageFont.truetype("Tests/fonts/NotoSansJP-Regular.otf", 50)
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im = Image.new(mode="RGB", size=(100, 300))
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draw = ImageDraw.Draw(im)
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try:
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draw.text(
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(27, 27),
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"あい",
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font=ttf,
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fill=500,
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direction="ttb",
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stroke_width=2,
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stroke_fill="#0f0",
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)
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except ValueError as ex:
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if str(ex) == "libraqm 0.7 or greater required for 'ttb' direction":
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pytest.skip("libraqm 0.7 or greater not available")
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target = "Tests/images/test_direction_ttb_stroke.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 12.4)
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def test_ligature_features():
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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.text((0, 0), "filling", font=ttf, fill=500, features=["-liga"])
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target = "Tests/images/test_ligature_features.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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liga_size = ttf.getsize("fi", features=["-liga"])
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assert liga_size == (13, 19)
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def test_kerning_features():
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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.text((0, 0), "TeToAV", font=ttf, fill=500, features=["-kern"])
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target = "Tests/images/test_kerning_features.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_arabictext_features():
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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.text(
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(0, 0),
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"اللغة العربية",
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font=ttf,
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fill=500,
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features=["-fina", "-init", "-medi"],
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)
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target = "Tests/images/test_arabictext_features.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_x_max_and_y_offset():
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ttf = ImageFont.truetype("Tests/fonts/ArefRuqaa-Regular.ttf", 40)
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im = Image.new(mode="RGB", size=(50, 100))
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draw = ImageDraw.Draw(im)
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draw.text((0, 0), "لح", font=ttf, fill=500)
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target = "Tests/images/test_x_max_and_y_offset.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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def test_language():
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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.text((0, 0), "абвг", font=ttf, fill=500, language="sr")
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target = "Tests/images/test_language.png"
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with Image.open(target) as target_img:
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assert_image_similar(im, target_img, 0.5)
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@pytest.mark.parametrize("anchor", ("lt", "mm", "rb", "sm"))
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def test_anchor_ttb(anchor):
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if parse_version(features.version_module("freetype2")) < parse_version("2.5.1"):
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# FreeType 2.5.1 README: Miscellaneous Changes:
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# Improved computation of emulated vertical metrics for TrueType fonts.
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pytest.skip("FreeType <2.5.1 has incompatible ttb metrics")
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text = "f"
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path = f"Tests/images/test_anchor_ttb_{text}_{anchor}.png"
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f = ImageFont.truetype("Tests/fonts/NotoSans-Regular.ttf", 120)
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im = Image.new("RGB", (200, 400), "white")
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d = ImageDraw.Draw(im)
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d.line(((0, 200), (200, 200)), "gray")
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d.line(((100, 0), (100, 400)), "gray")
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try:
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d.text((100, 200), text, fill="black", anchor=anchor, direction="ttb", font=f)
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except ValueError as ex:
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if str(ex) == "libraqm 0.7 or greater required for 'ttb' direction":
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pytest.skip("libraqm 0.7 or greater not available")
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with Image.open(path) as expected:
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assert_image_similar(im, expected, 1) # fails at 5
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combine_tests = (
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# extends above (e.g. issue #4553)
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("caron", "a\u030C\u030C\u030C\u030C\u030Cb", None, None, 0.08),
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("caron_la", "a\u030C\u030C\u030C\u030C\u030Cb", "la", None, 0.08),
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("caron_lt", "a\u030C\u030C\u030C\u030C\u030Cb", "lt", None, 0.08),
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("caron_ls", "a\u030C\u030C\u030C\u030C\u030Cb", "ls", None, 0.08),
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("caron_ttb", "ca" + ("\u030C" * 15) + "b", None, "ttb", 0.3),
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("caron_ttb_lt", "ca" + ("\u030C" * 15) + "b", "lt", "ttb", 0.3),
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# extends below
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("caron_below", "a\u032C\u032C\u032C\u032C\u032Cb", None, None, 0.02),
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("caron_below_ld", "a\u032C\u032C\u032C\u032C\u032Cb", "ld", None, 0.02),
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("caron_below_lb", "a\u032C\u032C\u032C\u032C\u032Cb", "lb", None, 0.02),
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("caron_below_ls", "a\u032C\u032C\u032C\u032C\u032Cb", "ls", None, 0.02),
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("caron_below_ttb", "a" + ("\u032C" * 15) + "b", None, "ttb", 0.03),
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("caron_below_ttb_lb", "a" + ("\u032C" * 15) + "b", "lb", "ttb", 0.03),
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# extends to the right (e.g. issue #3745)
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("double_breve_below", "a\u035Ci", None, None, 0.02),
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("double_breve_below_ma", "a\u035Ci", "ma", None, 0.02),
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("double_breve_below_ra", "a\u035Ci", "ra", None, 0.02),
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("double_breve_below_ttb", "a\u035Cb", None, "ttb", 0.02),
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("double_breve_below_ttb_rt", "a\u035Cb", "rt", "ttb", 0.02),
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("double_breve_below_ttb_mt", "a\u035Cb", "mt", "ttb", 0.02),
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("double_breve_below_ttb_st", "a\u035Cb", "st", "ttb", 0.02),
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# extends to the left (fail=0.064)
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("overline", "i\u0305", None, None, 0.02),
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("overline_la", "i\u0305", "la", None, 0.02),
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("overline_ra", "i\u0305", "ra", None, 0.02),
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("overline_ttb", "i\u0305", None, "ttb", 0.02),
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("overline_ttb_rt", "i\u0305", "rt", "ttb", 0.02),
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("overline_ttb_mt", "i\u0305", "mt", "ttb", 0.02),
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("overline_ttb_st", "i\u0305", "st", "ttb", 0.02),
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)
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# this tests various combining characters for anchor alignment and clipping
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@pytest.mark.parametrize(
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"name,text,anchor,dir,epsilon", combine_tests, ids=[r[0] for r in combine_tests]
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)
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def test_combine(name, text, dir, anchor, epsilon):
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if (
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parse_version(features.version_module("freetype2")) < parse_version("2.5.1")
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and dir == "ttb"
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):
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# FreeType 2.5.1 README: Miscellaneous Changes:
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# Improved computation of emulated vertical metrics for TrueType fonts.
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pytest.skip("FreeType <2.5.1 has incompatible ttb metrics")
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path = f"Tests/images/test_combine_{name}.png"
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f = ImageFont.truetype("Tests/fonts/NotoSans-Regular.ttf", 48)
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im = Image.new("RGB", (400, 400), "white")
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d = ImageDraw.Draw(im)
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d.line(((0, 200), (400, 200)), "gray")
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d.line(((200, 0), (200, 400)), "gray")
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try:
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d.text((200, 200), text, fill="black", anchor=anchor, direction=dir, font=f)
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except ValueError as ex:
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if str(ex) == "libraqm 0.7 or greater required for 'ttb' direction":
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pytest.skip("libraqm 0.7 or greater not available")
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with Image.open(path) as expected:
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assert_image_similar(im, expected, epsilon)
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def test_anchor_invalid_ttb():
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font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
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im = Image.new("RGB", (100, 100), "white")
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d = ImageDraw.Draw(im)
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d.font = font
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for anchor in ["", "l", "a", "lax", "xa", "la", "ls", "ld", "lx"]:
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pytest.raises(
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ValueError, lambda: font.getmask2("hello", anchor=anchor, direction="ttb")
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)
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pytest.raises(
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ValueError, lambda: d.text((0, 0), "hello", anchor=anchor, direction="ttb")
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)
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pytest.raises(
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ValueError,
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lambda: d.multiline_text(
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(0, 0), "foo\nbar", anchor=anchor, direction="ttb"
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),
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)
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# ttb multiline text does not support anchors at all
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pytest.raises(
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ValueError,
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lambda: d.multiline_text((0, 0), "foo\nbar", anchor="mm", direction="ttb"),
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)
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