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hatch_pattern and svg #9001

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Vitamin9024 opened this issue Jun 14, 2019 · 1 comment · Fixed by #10402
Closed

hatch_pattern and svg #9001

Vitamin9024 opened this issue Jun 14, 2019 · 1 comment · Fixed by #10402

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@Vitamin9024
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Vitamin9024 commented Jun 14, 2019

When I use output_backend='svg' and a hatch_pattern, the html file never loads (as if it was too many points). The same is with exporting.

Example:

f = figure(width=1000, height=500, output_backend='svg')
f.varea(x=[0, 100], y1=[0, 0], y2=[1, 1], alpha=0,
            hatch_pattern="/", hatch_scale=150)
show(f)  # or export_svgs(f, "some.svg") or export_png(f, "some.png")
@mattpap
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mattpap commented Jun 14, 2019

I can reproduce this and this behavior isn't unexpected given that bokehjs is a raster rendering library by default. I suppose this particular issue is fixable, but in any case that would require changes to canvas2svg library (https://github.com/gliffy/canvas2svg/) that we use to convert raster rendering commands to vector. They have an open PR for image embedding, which should be useful to improve performance in this case.

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