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121 lines
3.4 KiB
Python
121 lines
3.4 KiB
Python
import os
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from PIL import FontFile, Image, ImageDraw, ImageFont, PcfFontFile
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from .helper import assert_image_equal, assert_image_similar, skip_unless_feature
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fontname = "Tests/fonts/ter-x20b.pcf"
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charsets = {
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"iso8859-1": {
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"glyph_count": 223,
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"message": "hello, world",
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"image1": "Tests/images/test_draw_pbm_ter_en_target.png",
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},
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"iso8859-2": {
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"glyph_count": 223,
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"message": "witaj świecie",
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"image1": "Tests/images/test_draw_pbm_ter_pl_target.png",
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},
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"cp1250": {
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"glyph_count": 250,
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"message": "witaj świecie",
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"image1": "Tests/images/test_draw_pbm_ter_pl_target.png",
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},
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}
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pytestmark = skip_unless_feature("zlib")
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def save_font(request, tmp_path, encoding):
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with open(fontname, "rb") as test_file:
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font = PcfFontFile.PcfFontFile(test_file, encoding)
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assert isinstance(font, FontFile.FontFile)
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# check the number of characters in the font
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assert len([_f for _f in font.glyph if _f]) == charsets[encoding]["glyph_count"]
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tempname = str(tmp_path / "temp.pil")
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def delete_tempfile():
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try:
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os.remove(tempname[:-4] + ".pbm")
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except OSError:
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pass # report?
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request.addfinalizer(delete_tempfile)
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font.save(tempname)
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with Image.open(tempname.replace(".pil", ".pbm")) as loaded:
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with Image.open(f"Tests/fonts/ter-x20b-{encoding}.pbm") as target:
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assert_image_equal(loaded, target)
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with open(tempname, "rb") as f_loaded:
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with open(f"Tests/fonts/ter-x20b-{encoding}.pil", "rb") as f_target:
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assert f_loaded.read() == f_target.read()
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return tempname
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def _test_sanity(request, tmp_path, encoding):
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save_font(request, tmp_path, encoding)
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def test_sanity_iso8859_1(request, tmp_path):
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_test_sanity(request, tmp_path, "iso8859-1")
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def test_sanity_iso8859_2(request, tmp_path):
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_test_sanity(request, tmp_path, "iso8859-2")
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def test_sanity_cp1250(request, tmp_path):
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_test_sanity(request, tmp_path, "cp1250")
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def _test_draw(request, tmp_path, encoding):
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tempname = save_font(request, tmp_path, encoding)
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font = ImageFont.load(tempname)
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im = Image.new("L", (150, 30), "white")
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draw = ImageDraw.Draw(im)
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message = charsets[encoding]["message"].encode(encoding)
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draw.text((0, 0), message, "black", font=font)
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with Image.open(charsets[encoding]["image1"]) as target:
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assert_image_similar(im, target, 0)
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def test_draw_iso8859_1(request, tmp_path):
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_test_draw(request, tmp_path, "iso8859-1")
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def test_draw_iso8859_2(request, tmp_path):
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_test_draw(request, tmp_path, "iso8859-2")
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def test_draw_cp1250(request, tmp_path):
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_test_draw(request, tmp_path, "cp1250")
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def _test_textsize(request, tmp_path, encoding):
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tempname = save_font(request, tmp_path, encoding)
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font = ImageFont.load(tempname)
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for i in range(255):
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(dx, dy) = font.getsize(bytearray([i]))
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assert dy == 20
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assert dx in (0, 10)
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message = charsets[encoding]["message"].encode(encoding)
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for i in range(len(message)):
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msg = message[: i + 1]
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assert font.getsize(msg) == (len(msg) * 10, 20)
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def test_textsize_iso8859_1(request, tmp_path):
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_test_textsize(request, tmp_path, "iso8859-1")
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def test_textsize_iso8859_2(request, tmp_path):
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_test_textsize(request, tmp_path, "iso8859-2")
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def test_textsize_cp1250(request, tmp_path):
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_test_textsize(request, tmp_path, "cp1250")
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