René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: `backend_pdf` gives `TTLibError` with `pdf.fonttype : 42`","articleBody":"### Bug summary\n\nOn macOS 12, fresh install of conda-forge matplotlib 3.5.0, when saving a figure to pdf, I get:\r\n\r\n```python\r\nTTLibError: specify a font number between 0 and 5 (inclusive)\r\n```\r\n\r\nwhich I can trace to:\r\n```python\r\n...\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/backend_pdf.py in embedTTF(self, filename, characters)\r\n   1424             return embedTTFType3(font, characters, descriptor)\r\n   1425         elif fonttype == 42:\r\n-\u003e 1426             return embedTTFType42(font, characters, descriptor)\r\n   1427 \r\n   1428     def alphaState(self, alpha):\r\n...\r\n```\r\n\r\nEverything works as expected if I save to a png or if I set `pdf.fonttype : 3` in my `matplotlibrc` file and save to pdf.\r\n\r\nI can see that `Helvetica*.afm` is present under `~/miniconda3/lib/python3.8/site-packages/matplotlib/mpl-data/fonts/pdfcorefonts` but not under `.../ttf`\n\n### Code for reproduction\n\n```python\nimport matplotlib.pyplot as plt\r\nplt.plot((1,2,3))\r\nplt.title('Axes Title', font='Helvetica')\r\nplt.savefig('text.pdf')\n```\n\n\n### Actual outcome\n\n```python\r\n---------------------------------------------------------------------------\r\nTTLibError                                Traceback (most recent call last)\r\n/var/folders/bj/czjbfh496258q1lc3p01lyz00000gn/T/ipykernel_58793/3096390865.py in \u003cmodule\u003e\r\n      2 plt.plot((1,2,3))\r\n      3 plt.title('Axes Title', font='Helvetica')\r\n----\u003e 4 plt.savefig('text.pdf')\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/pyplot.py in savefig(*args, **kwargs)\r\n    956 def savefig(*args, **kwargs):\r\n    957     fig = gcf()\r\n--\u003e 958     res = fig.savefig(*args, **kwargs)\r\n    959     fig.canvas.draw_idle()   # need this if 'transparent=True' to reset colors\r\n    960     return res\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/figure.py in savefig(self, fname, transparent, **kwargs)\r\n   3010                         ax.patch._cm_set(facecolor='none', edgecolor='none'))\r\n   3011 \r\n-\u003e 3012             self.canvas.print_figure(fname, **kwargs)\r\n   3013 \r\n   3014     def ginput(self, n=1, timeout=30, show_clicks=True,\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)\r\n   2312                 # force the figure dpi to 72), so we need to set it again here.\r\n   2313                 with cbook._setattr_cm(self.figure, dpi=dpi):\r\n-\u003e 2314                     result = print_method(\r\n   2315                         filename,\r\n   2316                         facecolor=facecolor,\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backend_bases.py in wrapper(*args, **kwargs)\r\n   1641             kwargs.pop(arg)\r\n   1642 \r\n-\u003e 1643         return func(*args, **kwargs)\r\n   1644 \r\n   1645     return wrapper\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/_api/deprecation.py in wrapper(*inner_args, **inner_kwargs)\r\n    384             # Early return in the simple, non-deprecated case (much faster than\r\n    385             # calling bind()).\r\n--\u003e 386             return func(*inner_args, **inner_kwargs)\r\n    387         arguments = signature.bind(*inner_args, **inner_kwargs).arguments\r\n    388         if is_varargs and arguments.get(name):\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/backend_pdf.py in print_pdf(self, filename, dpi, bbox_inches_restore, metadata)\r\n   2786             renderer.finalize()\r\n   2787             if not isinstance(filename, PdfPages):\r\n-\u003e 2788                 file.finalize()\r\n   2789         finally:\r\n   2790             if isinstance(filename, PdfPages):  # finish off this page\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/backend_pdf.py in finalize(self)\r\n    792         self.endStream()\r\n    793         self._write_annotations()\r\n--\u003e 794         self.writeFonts()\r\n    795         self.writeExtGSTates()\r\n    796         self._write_soft_mask_groups()\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/backend_pdf.py in writeFonts(self)\r\n    925                 chars = self._character_tracker.used.get(filename)\r\n    926                 if chars:\r\n--\u003e 927                     fonts[Fx] = self.embedTTF(filename, chars)\r\n    928         self.writeObject(self.fontObject, fonts)\r\n    929 \r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/backend_pdf.py in embedTTF(self, filename, characters)\r\n   1424             return embedTTFType3(font, characters, descriptor)\r\n   1425         elif fonttype == 42:\r\n-\u003e 1426             return embedTTFType42(font, characters, descriptor)\r\n   1427 \r\n   1428     def alphaState(self, alpha):\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/backend_pdf.py in embedTTFType42(font, characters, descriptor)\r\n   1230             subset_str = \"\".join(chr(c) for c in characters)\r\n   1231             _log.debug(\"SUBSET %s characters: %s\", filename, subset_str)\r\n-\u003e 1232             fontdata = _backend_pdf_ps.get_glyphs_subset(filename, subset_str)\r\n   1233             _log.debug(\r\n   1234                 \"SUBSET %s %d -\u003e %d\", filename,\r\n\r\n~/miniconda3/lib/python3.8/site-packages/matplotlib/backends/_backend_pdf_ps.py in get_glyphs_subset(fontfile, characters)\r\n     40     options.drop_tables += ['FFTM', 'PfEd']\r\n     41 \r\n---\u003e 42     with subset.load_font(fontfile, options) as font:\r\n     43         subsetter = subset.Subsetter(options=options)\r\n     44         subsetter.populate(text=characters)\r\n\r\n~/miniconda3/lib/python3.8/site-packages/fontTools/misc/loggingTools.py in wrapper(*args, **kwds)\r\n    370                         def wrapper(*args, **kwds):\r\n    371                                 with self:\r\n--\u003e 372                                         return func(*args, **kwds)\r\n    373                         return wrapper\r\n    374                 else:\r\n\r\n~/miniconda3/lib/python3.8/site-packages/fontTools/subset/__init__.py in load_font(fontFile, options, checkChecksums, dontLoadGlyphNames, lazy)\r\n   3006 \t      lazy=True):\r\n   3007 \r\n-\u003e 3008 \tfont = ttLib.TTFont(fontFile,\r\n   3009                             checkChecksums=checkChecksums,\r\n   3010                             recalcBBoxes=options.recalc_bounds,\r\n\r\n~/miniconda3/lib/python3.8/site-packages/fontTools/ttLib/ttFont.py in __init__(self, file, res_name_or_index, sfntVersion, flavor, checkChecksums, verbose, recalcBBoxes, allowVID, ignoreDecompileErrors, recalcTimestamp, fontNumber, lazy, quiet, _tableCache)\r\n    141                         file = tmp\r\n    142                 self._tableCache = _tableCache\r\n--\u003e 143                 self.reader = SFNTReader(file, checkChecksums, fontNumber=fontNumber)\r\n    144                 self.sfntVersion = self.reader.sfntVersion\r\n    145                 self.flavor = self.reader.flavor\r\n\r\n~/miniconda3/lib/python3.8/site-packages/fontTools/ttLib/sfnt.py in __init__(self, file, checkChecksums, fontNumber)\r\n     58                         numFonts = header.numFonts\r\n     59                         if not 0 \u003c= fontNumber \u003c numFonts:\r\n---\u003e 60                                 raise TTLibError(\"specify a font number between 0 and %d (inclusive)\" % (numFonts - 1))\r\n     61                         self.numFonts = numFonts\r\n     62                         self.file.seek(header.offsetTable[fontNumber])\r\n\r\nTTLibError: specify a font number between 0 and 5 (inclusive)\r\n```\n\n### Expected outcome\n\nA pdf file saved to filesystem\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nmacOS 12, M1 pro, arm64\n\n### Matplotlib Version\n\n3.5.0\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n3.8.12\n\n### Jupyter version\n\n6.4.6\n\n### Installation\n\nconda","author":{"url":"https://github.com/shaharkadmiel","@type":"Person","name":"shaharkadmiel"},"datePublished":"2021-12-09T17:23:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/21893/matplotlib/issues/21893"}