Apply hinting factor rcParam in all cases.#9481
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This is only explicitly used in Agg, so any other users get the default in the C++ code. Thus if you modify this setting and use some other backend, you get very weird behaviour. Positioning sometimes breaks and glyphs are shrunk or cropped.
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Hmm, something might still be cached somewhere as changing the hinting factor in the middle of a script causes all text to be the wrong width. for hinting_factor in map(int, sys.argv[1:]):
plt.rcParams['text.hinting_factor'] = hinting_factor
fig, ax = plt.subplots()
ax.text(0.5, 0.5, 'text')
plt.show()Opens figures with progressively smaller text (or wider depending on what you specify), but it's fine if you specify anything other than 8 in a separate run. As an example of something this PR does fix, if you add a |
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@QuLogic but I guess that caching was already present before, in which case this PR does not really make things worse, does it? |
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@anntzer True, it just makes it more difficult to write a test. |
Static initializers are only applied the first time, so any subsequent calls with alternate hinting_factor would use the first value. FreeType copies the matrix values into an internal structure, so these do not really need to be static.
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I think that should fix the caching issue, and it even fixes the SVG+Agg save from above, without the first change. I guess the first change can still go in for consistency. But thinking about it, SVG and PDF render text externally, so it may be better to have those use |
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Ah, the static was tricky... |
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test failures look real though |
QuLogic
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Not sure why I needed the |
| def get_font(filename, hinting_factor=None): | ||
| if hinting_factor is None: | ||
| hinting_factor = rcParams['text.hinting_factor'] | ||
| return _get_font(filename, hinting_factor) |
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Is not it equals to?
@lru_cache(64)
def get_font(filename, hinting_factor=None):
if hinting_factor is None:
hinting_factor = rcParams['text.hinting_factor']
return ft2font.FT2Font(filename, hinting_factor)There was a problem hiding this comment.
That would cache hinting_factor=None with whatever the value of the rcParam was at first call.
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thanks |
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This is only explicitly used in Agg, so any other users get the default in the C++ code. Thus if you modify this setting and use some other backend, you get very weird behaviour. Positioning sometimes breaks and glyphs are shrunk or cropped.
@anntzer this is why just changing a random
hinting_factorproduced super-weird results yesterday.Don't know if it's worth backporting; I guess no-one ever tried modifying this setting or they would have complained. Also, trying to see if a simple test of some sort can be done.
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