glyphs | Dynamic design system for building and managing large icon | Icon library

I am running ubuntu 16.04 (it is on an OLD laptop). I am using 'pic | eqn -Tpdf -d@@ | groff -mm -Tpdf' software as per the ubuntu release. I need some symbols which are not in the standard groff TIMES font for the release. I have found the symbols I need in STIX and FreeMono that come with the ubuntu release. I have created the relevant font files for groff as per https://www.schaffter.ca/mom/momdoc/appendices.html.

It is almost working but there is extraneous spacing between characters / glyphs. See attached image. I have tried both STIX and FreeMono and they produce the same problem.

PDF output from groff eqn showing extraneous spacing

The groff, eqn mark up for the imaged example above is:

here is my code

I'm working with large data (~25million points) in Python in Jupyter Notebook and want to have an interactive graph that also doesn't take forever to load. Using Bokeh gives me the interactivity and Holoviews and Datashader allows the data to be graphed relatively quickly.

Python: 3.7.6
Bokeh: 1.4.0
Holoviews: 1.14.3
Numpy: 1.19.5
Pandas: 1.0.1
Numba: 0.48.0

I have no problem running this example code:

The OpenType documentation states that for GPOS lookups of type 4.1 (Mark-to-Base Attachment Positioning), the application must do the following:

To identify the base glyph that combines with a mark, the text-processing client must look backward in the glyph string from the mark to the preceding base glyph.

But how far do I need to look back? Is this always the preceding character? Or do I need to skip over all glyphs in the marks coverage table? Or go back until I find a glyph in the base coverage table?

I want to put a TTC (True Type Collection) font file in FontURI property of a Glyphs. I use .Net5.0

I found in the old silverlight documentation this : https://docs.microsoft.com/en-us/previous-versions/windows/silverlight/dotnet-windows-silverlight/ms599247(v=vs.95)

FontUri also supports TTC (TrueType Collection) fonts. You can index a specific font face offset in the collection using the format collectionname.ttc#n where n is the index within the collection. You can omit "#0" if you intend to reference the first font face in the collection.

But in the net5.0 documentation this paragraph is not in the documentation :

https://docs.microsoft.com/en-us/dotnet/api/system.windows.documents.glyphs.fonturi?view=net-5.0

I tried the #1 in the FontURI (for Cambria Math) but without luck.

Here is the code i tried to create the glyph font URI :

I am creating a video effect that is supposed to look as in "Matrix" movie, but a bit different ("Matrix"-like video output will be mixed with an altered alpha channel with real video, so it will look half real, half with digits). I am using simply mplayer with caca driver (mplayer -vo caca video.mp4) together with screen recording and then mixing videos in other software. For this I needed to change "static uint32_t ascii_glyphs[]" array in file dither.c (from the code of the caca library as it published here: https://github.com/cacalabs/libcaca/blob/master/caca/dither.c) from: ' ', '.', ':', ';', 't', '%', 'S', 'X', '@', '8', '?' to contain all Katakana symbols. But the problem is that it looks like they are not printable. So the terminal output of the video contains only shadow blocks. I should say that the bash code:

Suppose I have a list of (greyscale) pixels, e.g.

I'm trying to make an svg font for the unicode braille range. I want the black dots to be filled dots in (#fontcolor), and the non-dots to be circular lines.

"⠛" becomes the following svg:

I'm currently trying to write a script to display spectrograms of (multichannel) audio in Bokeh. Since I am doing some processing on the audio, I can't easily save them as files on the computer, so I'm trying to remain in Python.

The idea is to create a plot where each column corresponds to an audio sample, and each row corresponds to a channel.

Now I want to be able to listen to the corresponding audio when clicking on a subplot. I've managed to do the non-interactive part of displaying the spectrograms, written a callback to play audio, and applied it to each callback.

Here is a minimal working example of the code: