Folk Computer

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====== Bake A Custom SDF Font! ======

So, you want to make a custom font atlas for the Vulkan renderer! Here's my artisanal recipe, passed down through generations.

===== Ingredients =====

  * The [[https://github.com/Chlumsky/msdf-atlas-gen|msdf-atlas-gen]] source code\\ You'll need to clone this recursively, so you get the submodules:<code>
git clone --recurse-submodules https://github.com/Chlumsky/msdf-atlas-gen.git
</code>
  * A font file in ''ttf''/''otf'' OpenType formats
  * A C++ compiler
  * Cmake
  * tinyxml2 (install using your package manager, it's ''tinyxml2'' on in Homebrew (''%%brew%%''))

===== Recipe =====
  - Build ''msdf-atlas-gen''<file bash>
# In the msdf-atlas-gen folder
# On macOS/unix-like systems:

mkdir build && cd build # create the build folder
cmake -DMSDF_ATLAS_USE_VCPKG=OFF -DMSDF_ATLAS_USE_SKIA=OFF .. # generate makefile using cmake
make & cd bin # build and go to the output folder
</file>
  - Generate font files! <file bash>
# the magic command
./msdf-atlas-gen -type mtsdf -format png -csv FONTNAME.csv -imageout FONTNAME.png -font PATH_TO_FONT_FILE
</file>
  - Copy the generated ''FONTNAME.csv'' and ''FONTNAME.png'' to the ''vendor/fonts'' folder in folk
  - Edit line the lines that look like this line in ''display.folk'' to set it as a default <file tcl>
# replace the "PTSans-Regular" with FONTNAME
[...] {font "PTSans-Regular"} [...]
</file>
  - To use it in programs, do so: <file tcl>
# using a wish
Wish $this is labelled "Text" with font "FONTNAME"
# using display
Display::text $x $y $scale $text $radians FONTNAME
</file>