ManimPango 0.1.4

Bindings for Pango for using with Manim.

ManimPango

ManimPango is a C binding for Pango using Cython, which is internally used in Manim to render (non-LaTeX) text.

INSTALL

Installing ManimPango is super easy, just use pip. It is manimpango in PyPi.

pip install manimpango

Note:

For Linux Users, installing the binary wheel provided in PyPi may have unexpected side effects.

For example, a folder named fontconfig might be created in the current working directory. That folder would then have a lot of cache files each time you run Manim. In order to avoid this, you will have to install Manimpango from source:.

pip install manimpango --no-binary :all:

Please note that for this kind of installation to work, you must have a C compiler as well as Pango and its dependencies along with the Pango development headers. See BUILDING for more information.

BUILDING

Linux/MacOS

For building ManimPango, you need

• a C compiler
• Python's development headers
• pkg-config
• Pango along with its development headers and its dependencies.

If you are on MacOS, you can use brew to install those. Using MacPorts is also possible, but their version of Pango is old and will probably not be updated in the near future.

brew install pango pkg-config

If you are on Linux, you can use a system package manager to do so. For example, if you are on Debian based system, you can use apt

apt install libpango1.0-dev pkg-config python3-dev

Arch Linux: pacman -S pango pkgconf

Fedora: dnf install pango-devel pkg-config python3-devel

Or similar in your system's package manager.

Using tar archives

If you don't want to contribute to this repository, you can use the tar archives published in PyPi, or just use pip to install using

pip install manimpango --no-binary :all:

Note: pip by default uses wheels, so make sure to pass the --no-binary parameter.

Using git clones / Contributing

If you are using a clone of this repository, you will need Cython which can be easily installed using pip:

pip install Cython

After that you can use pip to install the clone with the following command:

pip install .

You will need to this way if you want to contribute to ManimPango.

Please remember to do this inside your poetry shell, if you want to use your Manimpango with Manim.

Contributing with Windows

If you are a normal user, don't read this, you have wheels which you can just install directly using pip.

If you want to contribute to ManimPango and you are on Windows, this section is for you.

As Windows does not include a C compiler by default, you will first need to install one. You have two choices:

1. MinGW/Msys2

2. Visual Studio

MinGW/Msys2

1. Download MSYS2 from the download link provided on their page https://www.msys2.org/#installation and install it according to their instructions.
2. Once you have MSYS2 installed, it offers you three different shells: the MinGW32 shell, the MinGW64 shell and MSYS shell. In order for the following steps to work, you have to open the MSYS2 MinGW64 shell (you can search for this). Small hint: it has a blue color logo.
3. Run the following commands to install Python, Pango, Cython, Numpy, Scipy, Pillow, Pycairo and ffmpeg

pacman -S mingw-w64-x86_64-python
pacman -S mingw-w64-x86_64-python-pip
pacman -S mingw-w64-x86_64-pango
pacman -S mingw-w64-x86_64-cython
pacman -S mingw-w64-x86_64-python-numpy
pacman -S mingw-w64-x86_64-python-scipy
pacman -S mingw-w64-x86_64-python-pillow
pacman -S mingw-w64-x86_64-python-cairo
pacman -S mingw-w64-x86_64-ffmpeg

4. Still in the same shell, install Manim using pip install manim.
5. Finally, get your clone of ManimPango, cd into that directory and then run pip install -e .. Note You can't use it with your regular Python version. It will cause weird errors if you do so. For working with ManimPango, you must be inside the MSYS2 MINGW64 shell.
6. You can then use manim inside that shell, to run Manim. Hint: If you want to try out Python interactively, you can open idle using the command python -m idlelib inside that shell.

Visual Studio

First, install Visual Studio as specified in https://wiki.python.org/moin/WindowsCompilers. Possibly Visual Studio Build Tools 2019 with Windows10 SDK.

Then run the script at packing/download_dlls.py. This will get a Pango build along with pkg-config and install it at C:\cibw\vendor. Add C:\cibw\vendor\bin and C:\cibw\vendor\pkg-config\bin to PATH.

Note: You can change the install location by editing line 24 of the file packing/download_dlls.py.

Then set an environment variable PKG_CONFIG_PATH=C:\cibw\vendor\lib\pkgconfig.

Then you can install Cython using

pip install Cython

Finally, you can install your local ManimPango clone just like any other python package by typing:

pip install .

Important: You have to to use https://docs.python.org/3/library/os.html#os.add_dll_directory before running ManimPango. Alternatively, you need to copy the dll at C:\cibw\vendor\bin to the folder where ManimPango is compiled. This is applicable for Python 3.8 and above.

import os
os.add_dll_directory('C:\cibw\vendor\bin')