Linux runtime: overrun detection for real-time timers and for plc execution.
If real-time timer wakes-up PLC thread too late (10% over period), then
warning is logged.
If PLC code (IO retreive, execution, IO publish) takes longer than requested
PLC execution cycle, then warning is logged, and CPU hoogging is mitigated
by delaying next PLC execution a few cylces more until having at least
1ms minimal idle time.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz
# Copyright (C) 2021: Edouard TISSERANT
#
# See COPYING file for copyrights details.
from __future__ import print_function
import sys
from base64 import b64encode
from fontTools import ttLib
# Inkscape seems to refer to font with different family name depending on platform.
# this are heuristics that would need extensive testing to be sure.
FamilyNameIDs = [1] if sys.platform.startswith('win') else [1, 16]
def GetFontTypeAndFamilyName(filename):
"""
Getting font family, format and MIME type
"""
familyname = None
uniquename = None
formatname = None
mimetype = None
font = ttLib.TTFont(filename)
# https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6name.html
for name in font["name"].names:
#print(name.nameID, name.platformID, name.langID, name.toUnicode())
if name.nameID in FamilyNameIDs and name.platformID==3 and name.langID==1033:
familyname = name.toUnicode()
if name.nameID==4 and name.platformID==3 and name.langID==1033:
uniquename = name.toUnicode()
if font.flavor :
# woff and woff2
formatname = font.flavor
mimetype = "font/" + formatname
# conditions on sfntVersion was deduced from fontTools.ttLib.sfnt
elif font.sfntVersion in ("\x00\x01\x00\x00", "true"):
formatname = "truetype"
mimetype = "font/ttf"
elif font.sfntVersion == "OTTO":
formatname = "opentype"
mimetype = "font/otf"
return familyname,uniquename,formatname,mimetype
def DataURIFromFile(filename, mimetype):
with open(filename, "rb") as fp:
data = fp.read()
return "".join([
"data:",
mimetype,
";base64,",
b64encode(data).strip()])
def GetCSSFontFaceFromFontFile(filename):
familyname, uniquename, formatname, mimetype = GetFontTypeAndFamilyName(filename)
data_uri = DataURIFromFile(filename, mimetype)
css_font_face = \
"""
@font-face {{
font-family: "{}";
src: url("{}") format("{}")
}}
""".format(familyname, data_uri, formatname)
return css_font_face
# tests
if __name__ == '__main__':
print(GetCSSFontFaceFromFontFile("/usr/share/matplotlib/mpl-data/fonts/ttf/DejaVuSans.ttf"))
print(GetCSSFontFaceFromFontFile("/usr/share/fonts/opentype/urw-base35/NimbusSans-Regular.otf"))
print(GetCSSFontFaceFromFontFile("/usr/share/yelp/mathjax/fonts/HTML-CSS/TeX/woff/MathJax_SansSerif-Regular.woff"))