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Add support for rendering bokeh and plotly plots as gifs #4017

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merged 2 commits into from
Oct 4, 2019
Merged

Add support for rendering bokeh and plotly plots as gifs #4017

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b6e997e
Add support for rendering bokeh plots as gifs
philippjfr Oct 2, 2019
4d16fd9
Added plotly support
philippjfr Oct 2, 2019
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35 changes: 27 additions & 8 deletions holoviews/plotting/bokeh/renderer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ class BokehRenderer(Renderer):

holomap = param.ObjectSelector(default='auto',
objects=['widgets', 'scrubber',
None, 'auto'], doc="""
None, 'gif', 'auto'], doc="""
Output render multi-frame (typically animated) format. If
None, no multi-frame rendering will occur.""")

Expand All @@ -51,7 +51,7 @@ class BokehRenderer(Renderer):

# Defines the valid output formats for each mode.
mode_formats = {'fig': ['html', 'auto', 'png'],
'holomap': ['widgets', 'scrubber', 'auto', None]}
'holomap': ['widgets', 'scrubber', 'gif', 'auto', None]}

_loaded = False
_render_with_panel = True
Expand Down Expand Up @@ -99,20 +99,39 @@ def _figure_data(self, plot, fmt, doc=None, as_script=False, **kwargs):
logger = logging.getLogger(bokeh.core.validation.check.__file__)
logger.disabled = True

if fmt == 'png':
if fmt == 'gif':
from bokeh.io.export import get_screenshot_as_png, create_webdriver
webdriver = create_webdriver()

nframes = len(plot)
frames = []
for i in range(nframes):
plot.update(i)
img = get_screenshot_as_png(plot.state, webdriver)
frames.append(img)
webdriver.close()

bio = BytesIO()
duration = (1./self.fps)*1000
frames[0].save(bio, format='GIF', append_images=frames[1:],
save_all=True, duration=duration, loop=0)
bio.seek(0)
data = bio.read()
elif fmt == 'png':
from bokeh.io.export import get_screenshot_as_png
img = get_screenshot_as_png(plot.state, None)
imgByteArr = BytesIO()
img.save(imgByteArr, format='PNG')
data = imgByteArr.getvalue()
if as_script:
b64 = base64.b64encode(data).decode("utf-8")
(mime_type, tag) = MIME_TYPES[fmt], HTML_TAGS[fmt]
src = HTML_TAGS['base64'].format(mime_type=mime_type, b64=b64)
div = tag.format(src=src, mime_type=mime_type, css='')
else:
div = render_mimebundle(plot.state, doc, plot.comm)[0]['text/html']

if as_script and fmt in ['png', 'gif']:
b64 = base64.b64encode(data).decode("utf-8")
(mime_type, tag) = MIME_TYPES[fmt], HTML_TAGS[fmt]
src = HTML_TAGS['base64'].format(mime_type=mime_type, b64=b64)
div = tag.format(src=src, mime_type=mime_type, css='')

plot.document = doc
if as_script:
return div
Expand Down
65 changes: 51 additions & 14 deletions holoviews/plotting/plotly/renderer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@

import base64

from io import BytesIO

import param
import panel as pn

Expand Down Expand Up @@ -45,8 +47,15 @@ class PlotlyRenderer(Renderer):
Output render format for static figures. If None, no figure
rendering will occur. """)

holomap = param.ObjectSelector(default='auto',
objects=['scrubber','widgets', 'gif',
None, 'auto'], doc="""
Output render multi-frame (typically animated) format. If
None, no multi-frame rendering will occur.""")


mode_formats = {'fig': ['html', 'png', 'svg'],
'holomap': ['widgets', 'scrubber', 'auto']}
'holomap': ['widgets', 'scrubber', 'gif', 'auto']}

widgets = ['scrubber', 'widgets']

Expand Down Expand Up @@ -75,28 +84,56 @@ def get_plot_state(self_or_cls, obj, doc=None, renderer=None, **kwargs):


def _figure_data(self, plot, fmt, as_script=False, **kwargs):
# Wrapping plot.state in go.Figure here performs validation
# and applies any default theme.
figure = go.Figure(plot.state)
if fmt == 'gif':
import plotly.io as pio

if fmt in ('png', 'svg'):
from PIL import Image
from plotly.io.orca import ensure_server, shutdown_server, status

running = status.state == 'running'
if not running:
ensure_server()

nframes = len(plot)
frames = []
for i in range(nframes):
plot.update(i)
img_bytes = BytesIO()
figure = go.Figure(self.get_plot_state(plot))
img = pio.to_image(figure, 'png', validate=False)
img_bytes.write(img)
frames.append(Image.open(img_bytes))

if not running:
shutdown_server()

bio = BytesIO()
duration = (1./self.fps)*1000
frames[0].save(bio, format='GIF', append_images=frames[1:],
save_all=True, duration=duration, loop=0)
bio.seek(0)
data = bio.read()
elif fmt in ('png', 'svg'):
import plotly.io as pio

# Wrapping plot.state in go.Figure here performs validation
# and applies any default theme.
figure = go.Figure(self.get_plot_state(plot))
data = pio.to_image(figure, fmt)

if fmt == 'svg':
data = data.decode('utf-8')

if as_script:
b64 = base64.b64encode(data).decode("utf-8")
(mime_type, tag) = MIME_TYPES[fmt], HTML_TAGS[fmt]
src = HTML_TAGS['base64'].format(mime_type=mime_type, b64=b64)
div = tag.format(src=src, mime_type=mime_type, css='')
return div
else:
return data
else:
raise ValueError("Unsupported format: {fmt}".format(fmt=fmt))

if as_script:
b64 = base64.b64encode(data).decode("utf-8")
(mime_type, tag) = MIME_TYPES[fmt], HTML_TAGS[fmt]
src = HTML_TAGS['base64'].format(mime_type=mime_type, b64=b64)
div = tag.format(src=src, mime_type=mime_type, css='')
return div
return data


@classmethod
def plot_options(cls, obj, percent_size):
Expand Down