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import os
import freetype
import pytest
test_folder = os.path.realpath(os.path.dirname(__file__))
def _ft_ver():
ft_ver_tuple = freetype.version()
ft_ver_str = ".".join(['{}'.format(i) for i in ft_ver_tuple])
return ft_ver_tuple, ft_ver_str
def test_variable_font_basics():
"""
Check that basic VF functionality functions (open a VF font, get VF info)
"""
ft_vt, ft_vs = _ft_ver()
if ft_vt < (2, 8, 1):
# note: there is some proto-VF (Multiple Master) support in older
# FreeType versions, but not enough to work with here.
pytest.skip("Incomplete VF support in FreeType lib {} (need 2.8.1 or later)".format(ft_vs))
return
font_path = os.path.join(
test_folder,
"..",
"examples",
"SourceSansVariable-Roman.otf")
face = freetype.Face(font_path)
var_info = face.get_variation_info()
assert len(var_info.axes) == 1
assert var_info.axes[0].tag == 'wght'
assert len(var_info.instances) == 6
for ii, cv in enumerate((200, 300, 400, 600, 700, 900)):
assert var_info.instances[ii].coords == (cv,)
def test_vf_axis_get_set():
ft_vt, ft_vs = _ft_ver()
if ft_vt < (2, 8, 1):
pytest.skip("Incomplete VF support in FreeType lib {} (need 2.8.1 or later)".format(ft_vs))
return
font_path = os.path.join(
test_folder,
"..",
"examples",
"SourceSansVariable-Roman.otf")
face = freetype.Face(font_path)
dc_in = (373,)
face.set_var_design_coords(dc_in)
dcoords = face.get_var_design_coords()
assert dcoords[0] == dc_in[0]
bc_in = (-0.5,)
face.set_var_blend_coords(bc_in)
bcoords = face.get_var_blend_coords()
assert bcoords[0] == bc_in[0]
# try 'reset to defaults' option
face.set_var_design_coords(None, reset=True)
dcoords = face.get_var_design_coords()
vsi = face.get_variation_info()
expected = tuple([vsi.axes[i].default for i in range(len(dcoords))])
assert dcoords == expected
def test_vf_set_named_instance():
ft_vt, ft_vs = _ft_ver()
if ft_vt < (2, 8, 1):
pytest.skip("Incomplete VF support in FreeType lib {} (need 2.8.1 or later)".format(ft_vs))
return
font_path = os.path.join(
test_folder,
"..",
"examples",
"SourceSansVariable-Roman.otf")
face = freetype.Face(font_path)
vsi = face.get_variation_info()
for inst in vsi.instances:
face.set_var_named_instance(inst.name)
dcoords = face.get_var_design_coords()
assert dcoords == inst.coords
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