Presetgen - Preset Build System

RetroArch Additions Tools & Scripts
#1

It became rather overwhelming to work with a large number of presets. I attempted to make it easier by making generation scripts. This is one of the scripts I use (the other are string replacement scripts). There is an example but if you would like to see more you can find it here: https://github.com/anikom15/scanline-classic/tree/dev/presetdata

Here is the code: https://github.com/anikom15/presetgen

PresetGen

PresetGen is a Python tool for generating RetroArch slang preset files from structured JSON descriptions. It is designed to help shader authors and advanced users automate the creation of complex preset files, ensuring consistency and maintainability.

Features

  • Compose presets from modular pipeline and parameter set JSON files
  • Automatic shader index assignment and option handling
  • Handles per-shader and global parameters
  • Outputs well-formatted .slangp files with comments and documentation
  • Validates all input files against JSON schemas

Usage

python presetgen.py [-o OUTPUT_DIR] [-v] <preset.json>
  • -o OUTPUT_DIR : Output directory (default: out in the script directory)
  • -v : Verbose output (shows details about file loading and processing)
  • <preset.json> : Input preset description file

Example:

python presetgen.py -v example_preset.json

Project Structure

  • presetgen.py : Main generation script
  • data.py : Classes for loading and validating JSON files
  • validate_preset.py : Standalone validation tool
  • pipelines/ : Pipeline JSON files and schema
  • params/ : Parameter set JSON files and schema
  • preset.schema.json : Preset JSON schema
  • requirements.txt : Python dependencies
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