Pass explicit font paths to fontspec in backend_pgf.

anntzer · anntzer · commit 76ecd02ebefd · 2018-02-26T12:13:27.000-08:00
diff --git a/lib/matplotlib/backends/backend_pgf.py b/lib/matplotlib/backends/backend_pgf.py
@@ -17,7 +17,7 @@
 import weakref
 
 import matplotlib as mpl
-from matplotlib import _png, rcParams
+from matplotlib import _png, font_manager as fm, rcParams
 from matplotlib.backend_bases import (
     _Backend, FigureCanvasBase, FigureManagerBase, GraphicsContextBase,
     RendererBase)
@@ -28,27 +28,6 @@
 
 ###############################################################################
 
-# create a list of system fonts, all of these should work with xe/lua-latex
-system_fonts = []
-if sys.platform.startswith('win'):
-    from matplotlib import font_manager
-    for f in font_manager.win32InstalledFonts():
-        try:
-            system_fonts.append(font_manager.get_font(str(f)).family_name)
-        except:
-            pass # unknown error, skip this font
-else:
-    # assuming fontconfig is installed and the command 'fc-list' exists
-    try:
-        # list scalable (non-bitmap) fonts
-        fc_list = subprocess.check_output(
-            ['fc-list', ':outline,scalable', 'family'])
-        fc_list = fc_list.decode('utf8')
-        system_fonts = [f.split(',')[0] for f in fc_list.splitlines()]
-        system_fonts = list(set(system_fonts))
-    except:
-        warnings.warn('error getting fonts from fc-list', UserWarning)
-
 
 def get_texcommand():
     """Get chosen TeX system from rc."""
@@ -66,17 +45,17 @@ def get_fontspec():
         latex_fontspec.append("\\usepackage{fontspec}")
 
     if texcommand != "pdflatex" and rcParams["pgf.rcfonts"]:
-        # try to find fonts from rc parameters
-        families = ["serif", "sans-serif", "monospace"]
-        fontspecs = [r"\setmainfont{%s}", r"\setsansfont{%s}",
-                     r"\setmonofont{%s}"]
-        for family, fontspec in zip(families, fontspecs):
-            matches = [f for f in rcParams["font." + family]
-                       if f in system_fonts]
-            if matches:
-                latex_fontspec.append(fontspec % matches[0])
-            else:
-                pass  # no fonts found, fallback to LaTeX defaule
+        families = ["serif", "sans\\-serif", "monospace"]
+        commands = ["setmainfont", "setsansfont", "setmonofont"]
+        for family, command in zip(families, commands):
+            dirname, basename = os.path.split(fm.findfont(family))
+            # 1) Forward slashes also work on Windows, so don't mess with
+            # backslashes.  2) The dirname needs to include a separator.
+            if sys.platform == "win32":
+                dirname = dirname.replace("\\", "/")
+            dirname += "/"
+            latex_fontspec.append(
+                r"\%s{%s}[Path=%s]" % (command, basename, dirname))
 
     return "\n".join(latex_fontspec)
 
