8000 Emoji missing when use plt.savefig() · Issue #4492 · matplotlib/matplotlib · GitHub
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yeqingyan opened this issue Jun 2, 2015 · 15 comments
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Emoji missing when use plt.savefig() #4492

yeqingyan opened this issue Jun 2, 2015 · 15 comments

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@yeqingyan
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I am trying to use matplotlib draw frequency of emoji used in text. Emoji looks good when I called plt.show() to show the figure.
emoji_good

But after I call plt.savefig("test.png") to save figures, the emojis were missing.
emoji_missing

Is there any way to show emoji in png files? Thank you!

My system is Mac OS X Yosemite 10.10.3, my matplotlib version is 1.3.1.
@WeatherGod
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Which backend are you using? I suspect the OS is supplying the emoji images
through the GUI framework, so it wouldn't work in all backends, nor have we
ever written tests for this. I doubt it would be trivial to add support for
it throughout mpl.
On Jun 2, 2015 4:04 PM, "yeqingyan" notifications@github.com wrote:

I am trying to use matplotlib draw frequency of emoji used in text. Emoji
looks good when I called plt.show() to show the figure.
[image: emoji_good]
https://cloud.githubusercontent.com/assets/8574101/7945703/4fcef0a2-0927-11e5-8810-f98a8e658e3c.png

But after I call plt.savefig("test.png") to save figures, the emojis were
missing.
[image: emoji_missing]
https://cloud.githubusercontent.com/assets/8574101/7945725/72ff83c0-0927-11e5-92aa-e477c8d3a1cf.png

Is there any way to show emoji in png files? Thank you!

My system is Mac OS X Yosemite 10.10.3, my matplotlib version is 1.3.1.

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@yeqingyan
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I think the backend I used is MacOSX. I got it by running following commands:

import matplotlib
matplotlib.get_backend()
'MacOSX'

@tacaswell
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@WeatherGod emoji are just unicode, support only depneds on the font being use. The issue here is that the font being used by osx is a system font which has them and for the png I bet it is falling back to the fonts we ship. Explicitly setting the text to use a font that has the emoji glyphs should be all that is needed.

@mdboom
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mdboom commented Jun 3, 2015

Wow. Talk about something cool that works completely by accident!

@WeatherGod
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I wonder if resetting the font list cache might help here? I don't know how
well the font-finding mechanisms work on macs, but it should pick up the
system font, no?

On Wed, Jun 3, 2015 at 8:44 AM, Michael Droettboom <notifications@github.com

wrote:

Wow. Talk about something cool that works completely by accident!

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@yeqingyan
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Thank you for your reply! I followed font example here http://matplotlib.org/examples/pylab_examples/fonts_demo.html, I tried to set the emoji font family,but I still got the same result, the emoji looks good after call show function, but they are missing after I save it to png files.

from matplotlib.font_manager import FontProperties
from pylab import *

subplot(111, axisbg='w')

font0 = FontProperties()
alignment = {'horizontalalignment':'center', 'verticalalignment':'baseline'}
###  Show family options

family = ['Apple Color Emoji', 'Apple Color Emoji', 'Apple Color Emoji', 'Apple Color Emoji', 'Apple Color Emoji']

font1 = font0.copy()
font1.set_size('large')

t = text(-0.8, 0.9, 'family', fontproperties=font1,
         **alignment)

yp = [0.7, 0.5, 0.3, 0.1, -0.1, -0.3, -0.5]

for k in range(5):
    font = font0.copy()
    font.set_family(family[k])
    if k == 2:
        font.set_name('Script MT')
    #print emoji
    t = text(-0.8, yp[k], '\xf0\x9f\x98\x8d'.decode("utf-8"), fontproperties=font,
             **alignment)
axis([-1,1,0,1])
show()

In show window:
screen shot 2015-06-03 at 2 37 40 pm
After save it to png file:
figure_1

@tacaswell
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I think you want to be setting the font name, not family, ex

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
t = ax.text(.5, .5, b'\xF0\x9F\x98\x85\xf0\x9f\x98\x8d\xF0\x9F\x98\x85'.decode('utf-8'), fontname='symbola', fontsize=30, ha='center')
t = ax.text(.5, .25, '😅😍😅', fontname='symbola', fontsize=30, ha='center')

so

from matplotlib.figure_manager import fontManager as fm

fm.findfont(prop)

will let you run the font search and will tell you (via a warning) if it fails.

@pelson
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pelson commented Jun 22, 2015

@tacaswell - I hope you've lined this example up for the state of the library talk! 😄

@tacaswell
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The plan is emoji + hello in a collection of languages.
8000

@WeatherGod
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Do we still not support right-to-left fonts such as arabic and hebrew?

On Mon, Jun 22, 2015 at 1:34 PM, Thomas A Caswell notifications@github.com
wrote:

The plan is emoji + hello in a collection of languages.

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@tacaswell
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Ah, I bet we do not.

On Mon, Jun 22, 2015 at 1:45 PM Benjamin Root notifications@github.com
wrote:

Do we still not support right-to-left fonts such as arabic and hebrew?

On Mon, Jun 22, 2015 at 1:34 PM, Thomas A Caswell <
notifications@github.com>
wrote:

The plan is emoji + hello in a collection of languages.

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.

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@mdboom
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mdboom commented Jun 22, 2015

Yeah -- the text layout algorithm is still "Naive American [TM]"

On Mon, Jun 22, 2015 at 1:47 PM Thomas A Caswell notifications@github.com
wrote:

Ah, I bet we do not.

On Mon, Jun 22, 2015 at 1:45 PM Benjamin Root notifications@github.com
wrote:

Do we still not support right-to-left fonts such as arabic and hebrew?

On Mon, Jun 22, 2015 at 1:34 PM, Thomas A Caswell <
notifications@github.com>
wrote:

The plan is emoji + hello in a collection of languages.

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<

#4492 (comment)

.

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.

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@gepcel gepcel mentioned this issue Apr 24, 2016
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@gepcel gepcel mentioned this issue May 22, 2016
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@samsaara
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samsaara commented Jun 28, 2016 •
edited
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I tried @tacaswell's suggestions but with Apple Emoji.

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
t = ax.text(.5, .25, '😅😍😅', fontname='Apple Color Emoji', fontsize=30, ha='center')

plt.show() displays nicely:

screen shot 2016-06-28 at 12 05 05 pm

But I couldn't save it and instead get the same boxes as shown above in the thread. I could save with Symbola font though. So is there any way I can take advantage of Apple Emoji while saving ?

I use Mac OS X 10.11.5 and Matplotlib 1.5.1

@WeatherGod
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This is probably related to the differences in the macosx's font lookup
which enables it to find more fonts than what matplotlib can find. Have you
tried clearing your font-cache?

On Tue, Jun 28, 2016 at 6:38 AM, Keviv notifications@github.com wrote:

I tried @tacaswell https://github.com/tacaswell's suggestions but with Apple
Emoji.

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
t = ax.text(.5, .25, '😅😍😅', fontname='Apple Color Emoji', fontsize=30, ha='center')

plt.show() displays nicely:

[image: screen shot 2016-06-28 at 12 05 05 pm]
https://cloud.githubusercontent.com/assets/6368653/16412435/777411d4-3d2c-11e6-9b5a-d7175ed99ce3.jpg

But I couldn't save it and instead get the same boxes as shown above in
the thread. I could save with Symbola font though. So is there any way I
can take advantage of Apple Emoji while saving ? Like copying the font to
somewhere inside matplotlib folder ?

I use Mac OS X 10.11.5 and Matplotlib 1.5.1

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@samsaara
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if you mean, deleting the .matplotlib folder, then yes; I've tried that option.

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6 participants
@mdboom @tacaswell @WeatherGod @pelson @samsaara @yeqingyan
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