Pillow/Tests/test_imagefontctl.py

import pytest
from PIL import Image, ImageDraw, ImageFont

from .helper import assert_image_similar, skip_unless_feature

FONT_SIZE = 20
FONT_PATH = "Tests/fonts/DejaVuSans.ttf"

pytestmark = skip_unless_feature("raqm")


def test_english():
    # smoke test, this should not fail
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)
    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "TEST", font=ttf, fill=500, direction="ltr")


def test_complex_text():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "اهلا عمان", font=ttf, fill=500)

    target = "Tests/images/test_text.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_y_offset():
    ttf = ImageFont.truetype("Tests/fonts/NotoNastaliqUrdu-Regular.ttf", FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "العالم العربي", font=ttf, fill=500)

    target = "Tests/images/test_y_offset.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 1.7)


def test_complex_unicode_text():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "السلام عليكم", font=ttf, fill=500)

    target = "Tests/images/test_complex_unicode_text.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)

    ttf = ImageFont.truetype("Tests/fonts/KhmerOSBattambang-Regular.ttf", FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "លោកុប្បត្តិ", font=ttf, fill=500)

    target = "Tests/images/test_complex_unicode_text2.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 2.33)


def test_text_direction_rtl():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "English عربي", font=ttf, fill=500, direction="rtl")

    target = "Tests/images/test_direction_rtl.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_text_direction_ltr():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "سلطنة عمان Oman", font=ttf, fill=500, direction="ltr")

    target = "Tests/images/test_direction_ltr.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_text_direction_rtl2():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "Oman سلطنة عمان", font=ttf, fill=500, direction="rtl")

    target = "Tests/images/test_direction_ltr.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_text_direction_ttb():
    ttf = ImageFont.truetype("Tests/fonts/NotoSansJP-Regular.otf", FONT_SIZE)

    im = Image.new(mode="RGB", size=(100, 300))
    draw = ImageDraw.Draw(im)
    try:
        draw.text((0, 0), "English あい", font=ttf, fill=500, direction="ttb")
    except ValueError as ex:
        if str(ex) == "libraqm 0.7 or greater required for 'ttb' direction":
            pytest.skip("libraqm 0.7 or greater not available")

    target = "Tests/images/test_direction_ttb.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 1.15)


def test_text_direction_ttb_stroke():
    ttf = ImageFont.truetype("Tests/fonts/NotoSansJP-Regular.otf", 50)

    im = Image.new(mode="RGB", size=(100, 300))
    draw = ImageDraw.Draw(im)
    try:
        draw.text(
            (25, 25),
            "あい",
            font=ttf,
            fill=500,
            direction="ttb",
            stroke_width=2,
            stroke_fill="#0f0",
        )
    except ValueError as ex:
        if str(ex) == "libraqm 0.7 or greater required for 'ttb' direction":
            pytest.skip("libraqm 0.7 or greater not available")

    target = "Tests/images/test_direction_ttb_stroke.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 12.4)


def test_ligature_features():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "filling", font=ttf, fill=500, features=["-liga"])
    target = "Tests/images/test_ligature_features.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)

    liga_size = ttf.getsize("fi", features=["-liga"])
    assert liga_size == (13, 19)


def test_kerning_features():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "TeToAV", font=ttf, fill=500, features=["-kern"])

    target = "Tests/images/test_kerning_features.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_arabictext_features():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text(
        (0, 0),
        "اللغة العربية",
        font=ttf,
        fill=500,
        features=["-fina", "-init", "-medi"],
    )

    target = "Tests/images/test_arabictext_features.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_x_max_and_y_offset():
    ttf = ImageFont.truetype("Tests/fonts/ArefRuqaa-Regular.ttf", 40)

    im = Image.new(mode="RGB", size=(50, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "لح", font=ttf, fill=500)

    target = "Tests/images/test_x_max_and_y_offset.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)


def test_language():
    ttf = ImageFont.truetype(FONT_PATH, FONT_SIZE)

    im = Image.new(mode="RGB", size=(300, 100))
    draw = ImageDraw.Draw(im)
    draw.text((0, 0), "абвг", font=ttf, fill=500, language="sr")

    target = "Tests/images/test_language.png"
    with Image.open(target) as target_img:
        assert_image_similar(im, target_img, 0.5)