@@ -42,8 +42,10 @@ def _get_documentclass():
4242 else:
4343 return _DOCUMENTCLASS
4444
45- def _get_preamble():
45+ def _get_preamble(commands=None ):
4646 """Prepare a LaTeX preamble based on the rcParams configuration."""
47+ if commands is None:
48+ commands = []
4749 font_size_pt = FontProperties(
4850 size=mpl.rcParams["font.size"]
4951 ).get_size_in_points()
@@ -68,6 +70,7 @@ def _get_preamble():
6870 for family in ["serif", "sans\\-serif", "monospace"]]
6971 )
7072 ] + [r"\fi"] if mpl.rcParams["pgf.rcfonts"] else []),
73+ *commands,
7174 # Documented as "must come last".
7275 mpl.texmanager._usepackage_if_not_loaded("underscore", option="strings"),
7376 ])
@@ -201,12 +204,13 @@ class LatexManager:
201204 @staticmethod
202205 def _build_latex_header():
203206 latex_header = [
204- _get_preamble(),
205- # Include TeX program name as a comment for cache invalidation.
206- # TeX does not allow this to be the first line.
207- rf"% !TeX program = {mpl.rcParams['pgf.texsystem']}",
208- # Test whether \includegraphics supports interpolate option.
209- r"\usepackage{graphicx}",
207+ _get_preamble(commands=[
208+ # Include TeX program name as a comment for cache invalidation.
209+ # TeX does not allow this to be the first line.
210+ rf"% !TeX program = {mpl.rcParams['pgf.texsystem']}",
211+ # Test whether \includegraphics supports interpolate option.
212+ r"\usepackage{graphicx}",
213+ ]),
210214 r"\begin{document}",
211215 r"\typeout{pgf_backend_query_start}",
212216 ]
@@ -832,11 +836,12 @@ def print_pdf(self, fname_or_fh, *, metadata=None, **kwargs):
832836 "\n".join([
833837 r"\PassOptionsToPackage{pdfinfo={%s}}{hyperref}" % pdfinfo,
834838 r"\PassOptionsToPackage{%s}{geometry}" % geometry_options,
835- _get_preamble(),
836- r"\usepackage{hyperref}",
837- r"\usepackage{geometry}",
838- r"\geometry{reset, %s}" % geometry_options,
839- r"\usepackage{pgf}",
839+ _get_preamble(inserted_lines=[
840+ r"\usepackage{hyperref}",
841+ r"\usepackage{geometry}",
842+ r"\geometry{reset, %s}" % geometry_options,
843+ r"\usepackage{pgf}",
844+ ]),
840845 r"\begin{document}",
841846 r"\centering",
842847 r"\input{figure.pgf}",
@@ -945,11 +950,12 @@ def _write_header(self, width_inches, height_inches):
945950 latex_header = "\n".join([
946951 r"\PassOptionsToPackage{pdfinfo={%s}}{hyperref}" % pdfinfo,
947952 r"\PassOptionsToPackage{%s}{geometry}" % geometry_options,
948- _get_preamble(),
949- r"\usepackage{hyperref}",
950- r"\usepackage{geometry}",
951- r"\geometry{reset, %s}" % geometry_options,
952- r"\usepackage{pgf}",
953+ _get_preamble(inserted_lines=[
954+ r"\usepackage{hyperref}",
955+ r"\usepackage{geometry}",
956+ r"\geometry{reset, %s}" % geometry_options,
957+ r"\usepackage{pgf}",
958+ ]),
953959 r"\setlength{\parindent}{0pt}",
954960 r"\begin{document}%",
955961 ])
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