Pillow/Tests/test_font_pcf_charsets.py
Andrew Murray ec9015bea4
Renamed variable
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
2020-06-06 19:42:24 +10:00

121 lines
3.4 KiB
Python

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