|
| 1 | +from __future__ import annotations |
| 2 | + |
| 3 | +from pathlib import Path |
| 4 | + |
| 5 | +from PIL import Image, ImageDraw, ImageFont |
| 6 | + |
| 7 | +FONT_PATH = str(Path(__file__).parent / "fonts" / "test_yaff.yaff") |
| 8 | + |
| 9 | + |
| 10 | +class TestYaffFont: |
| 11 | + def test_load_yaff(self) -> None: |
| 12 | + font = ImageFont.yaff(FONT_PATH) |
| 13 | + assert len(font.glyphs) > 0 |
| 14 | + assert font.ascent == 7 |
| 15 | + assert font.descent == 2 |
| 16 | + |
| 17 | + def test_load_yaff_pathlib(self) -> None: |
| 18 | + font = ImageFont.yaff(Path(FONT_PATH)) |
| 19 | + assert len(font.glyphs) > 0 |
| 20 | + |
| 21 | + def test_load_yaff_fileobj(self) -> None: |
| 22 | + with open(FONT_PATH, "rb") as f: |
| 23 | + font = ImageFont.yaff(f) |
| 24 | + assert len(font.glyphs) > 0 |
| 25 | + |
| 26 | + def test_getmetrics(self) -> None: |
| 27 | + font = ImageFont.yaff(FONT_PATH) |
| 28 | + ascent, descent = font.getmetrics() |
| 29 | + assert ascent == 7 |
| 30 | + assert descent == 2 |
| 31 | + |
| 32 | + def test_getlength(self) -> None: |
| 33 | + font = ImageFont.yaff(FONT_PATH) |
| 34 | + length = font.getlength("A") |
| 35 | + assert length > 0 |
| 36 | + |
| 37 | + def test_getlength_kerning(self) -> None: |
| 38 | + font = ImageFont.yaff(FONT_PATH) |
| 39 | + # AV has kerning: right-kerning on A for V is -2, left-kerning on V for A is -1 |
| 40 | + length_av = font.getlength("AV") |
| 41 | + length_a = font.getlength("A") |
| 42 | + length_v = font.getlength("V") |
| 43 | + assert length_av < length_a + length_v |
| 44 | + assert length_av == length_a + length_v - 3 # -2 + -1 = -3 |
| 45 | + |
| 46 | + def test_getlength_kerning_at(self) -> None: |
| 47 | + font = ImageFont.yaff(FONT_PATH) |
| 48 | + # AT has kerning: right-kerning on A for T is -1 |
| 49 | + length_at = font.getlength("AT") |
| 50 | + length_a = font.getlength("A") |
| 51 | + length_t = font.getlength("T") |
| 52 | + assert length_at < length_a + length_t |
| 53 | + assert length_at == length_a + length_t - 1 |
| 54 | + |
| 55 | + def test_getbbox(self) -> None: |
| 56 | + font = ImageFont.yaff(FONT_PATH) |
| 57 | + bbox = font.getbbox("A") |
| 58 | + assert bbox[0] == 0 |
| 59 | + assert bbox[1] == 0 |
| 60 | + assert bbox[2] > 0 |
| 61 | + assert bbox[3] == font.ascent + font.descent |
| 62 | + |
| 63 | + def test_getmask(self) -> None: |
| 64 | + font = ImageFont.yaff(FONT_PATH) |
| 65 | + mask = font.getmask("A") |
| 66 | + assert mask is not None |
| 67 | + assert mask.size[0] > 0 |
| 68 | + assert mask.size[1] > 0 |
| 69 | + |
| 70 | + def test_getmask_mode_l(self) -> None: |
| 71 | + font = ImageFont.yaff(FONT_PATH) |
| 72 | + mask = font.getmask("A", mode="L") |
| 73 | + assert mask is not None |
| 74 | + |
| 75 | + def test_getmask2(self) -> None: |
| 76 | + font = ImageFont.yaff(FONT_PATH) |
| 77 | + mask, offset = font.getmask2("A") |
| 78 | + assert mask is not None |
| 79 | + assert offset == (0, 0) |
| 80 | + |
| 81 | + def test_render_text(self) -> None: |
| 82 | + font = ImageFont.yaff(FONT_PATH) |
| 83 | + im = Image.new("1", (50, 20)) |
| 84 | + draw = ImageDraw.Draw(im) |
| 85 | + draw.text((5, 5), "AVA", fill=1, font=font) |
| 86 | + # Check that some pixels were drawn |
| 87 | + assert im.getbbox() is not None |
| 88 | + |
| 89 | + def test_render_text_rgb(self) -> None: |
| 90 | + font = ImageFont.yaff(FONT_PATH) |
| 91 | + im = Image.new("RGB", (50, 20), "white") |
| 92 | + draw = ImageDraw.Draw(im) |
| 93 | + draw.text((5, 5), "A", fill="black", font=font) |
| 94 | + # Check some pixels changed from white |
| 95 | + pixels = list(im.get_flattened_data()) |
| 96 | + assert any(p != (255, 255, 255) for p in pixels) |
| 97 | + |
| 98 | + def test_default_char(self) -> None: |
| 99 | + font = ImageFont.yaff(FONT_PATH) |
| 100 | + # Character not in font should use default char (0x3f = '?') |
| 101 | + length_unknown = font.getlength("\u00ff") |
| 102 | + length_question = font.getlength("?") |
| 103 | + assert length_unknown == length_question |
| 104 | + |
| 105 | + def test_empty_text(self) -> None: |
| 106 | + font = ImageFont.yaff(FONT_PATH) |
| 107 | + length = font.getlength("") |
| 108 | + assert length == 0 |
| 109 | + |
| 110 | + def test_bytes_text(self) -> None: |
| 111 | + font = ImageFont.yaff(FONT_PATH) |
| 112 | + length = font.getlength(b"A") |
| 113 | + assert length > 0 |
| 114 | + |
| 115 | + |
| 116 | +class TestYaffFontParser: |
| 117 | + def test_parse_unicode_label(self) -> None: |
| 118 | + from PIL.YaffFontFile import _parse_label |
| 119 | + |
| 120 | + assert _parse_label("u+0041") == [0x41] |
| 121 | + assert _parse_label("U+0041") == [0x41] |
| 122 | + |
| 123 | + def test_parse_quoted_label(self) -> None: |
| 124 | + from PIL.YaffFontFile import _parse_label |
| 125 | + |
| 126 | + assert _parse_label("'A'") == [0x41] |
| 127 | + |
| 128 | + def test_parse_hex_codepoint(self) -> None: |
| 129 | + from PIL.YaffFontFile import _parse_label |
| 130 | + |
| 131 | + assert _parse_label("0x41") == [0x41] |
| 132 | + |
| 133 | + def test_parse_decimal_codepoint(self) -> None: |
| 134 | + from PIL.YaffFontFile import _parse_label |
| 135 | + |
| 136 | + assert _parse_label("65") == [0x41] |
| 137 | + |
| 138 | + def test_parse_tag_label(self) -> None: |
| 139 | + from PIL.YaffFontFile import _parse_label |
| 140 | + |
| 141 | + assert _parse_label('"some_tag"') == [] |
| 142 | + |
| 143 | + def test_kerning_values(self) -> None: |
| 144 | + font = ImageFont.yaff(FONT_PATH) |
| 145 | + glyph_a = font.glyphs[0x41] |
| 146 | + assert 0x56 in glyph_a.right_kerning |
| 147 | + assert glyph_a.right_kerning[0x56] == -2 |
| 148 | + assert 0x54 in glyph_a.right_kerning |
| 149 | + assert glyph_a.right_kerning[0x54] == -1 |
| 150 | + |
| 151 | + glyph_v = font.glyphs[0x56] |
| 152 | + assert 0x41 in glyph_v.left_kerning |
| 153 | + assert glyph_v.left_kerning[0x41] == -1 |
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