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Python: use Nimbus Roman serif font for Linux systems #15663

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Merged
rmcdermo merged 2 commits into from
Dec 4, 2025
Merged

Python: use Nimbus Roman serif font for Linux systems #15663

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5528e64
Python
rmcdermo Dec 4, 2025
99e221b
Python: move configure_fds_fonts outside plot_to_fig
rmcdermo Dec 4, 2025
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89 changes: 71 additions & 18 deletions Utilities/Python/fdsplotlib.py
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Original file line number Diff line number Diff line change
Expand Up @@ -708,6 +708,57 @@ def get_data(E, spec, start_idx):
return y, col_names


def configure_fds_fonts():
import matplotlib.pyplot as plt
import platform

system = platform.system()

if system == "Linux":
# Linux: use Nimbus Roman as primary serif, with Times ahead of Times New Roman in the fallback chain
primary_serif = "Nimbus Roman"
serif_list = [
"Nimbus Roman", # primary on Linux
"Times",
"Times New Roman",
"serif",
]
else:
# macOS ("Darwin") and Windows: prefer Times, then Times New Roman
primary_serif = "Times"
serif_list = [
"Times", # first choice
"Times New Roman",
"Nimbus Roman",
"serif",
]

plt.rcParams.update({
# Core-14 fonts for small PDFs (Times-Roman in output)
"pdf.use14corefonts": True,
"text.usetex": False,

# Make serif the default everywhere
"font.family": "serif",
"font.serif": serif_list,

# If something explicitly requests 'sans-serif', try to keep it Times-like too
"font.sans-serif": serif_list,

# Math text: follow the same primary serif
"mathtext.fontset": "custom",
"mathtext.rm": primary_serif,
"mathtext.it": f"{primary_serif}:italic",
"mathtext.bf": f"{primary_serif}:bold",
"mathtext.cal": f"{primary_serif}:italic",
"mathtext.tt": "Courier",
"mathtext.default": "rm",

"axes.unicode_minus": False,
"pdf.compression": 9,
})


def plot_to_fig(x_data,y_data,**kwargs):
"""
Create a simple x,y plot and return the fig handle
Expand All @@ -718,30 +769,32 @@ def plot_to_fig(x_data,y_data,**kwargs):
# for key, value in kwargs.items():
# print ("%s == %s" %(key, value))

plot_style = get_plot_style("fds")

import matplotlib.pyplot as plt
import matplotlib.ticker as ticker

plt.rcParams.update({
"pdf.use14corefonts": True,
"text.usetex": False,
plot_style = get_plot_style("fds")

# Text and math in Times New Roman
"font.family": "serif",
"font.serif": ["Times", "Times New Roman"],
configure_fds_fonts()

"mathtext.fontset": "custom",
"mathtext.rm": "Times",
"mathtext.it": "Times New Roman:italic",
"mathtext.bf": "Times:bold",
"mathtext.cal": "Times New Roman:italic",
"mathtext.tt": "Courier New",
"mathtext.default": "it",
# plt.rcParams.update({
# "pdf.use14corefonts": True,
# "text.usetex": False,

"axes.unicode_minus": False,
"pdf.compression": 9,
})
# # Text and math in Times New Roman
# "font.family": "serif",
# "font.serif": ["Times", "Times New Roman"],

# "mathtext.fontset": "custom",
# "mathtext.rm": "Times",
# "mathtext.it": "Times New Roman:italic",
# "mathtext.bf": "Times:bold",
# "mathtext.cal": "Times New Roman:italic",
# "mathtext.tt": "Courier New",
# "mathtext.default": "it",

# "axes.unicode_minus": False,
# "pdf.compression": 9,
# })

import logging
# Suppress just the 'findfont' warnings from matplotlib's font manager
Expand Down