Khronos-inspired rendering extensions for the Fabric Renderer API.
Due to Sodium's omnipresence in the Fabric modding community and in modpacks, many rendering-heavy mods resort to using Mixin on Indigo and Sodium. Mockingly, Fabric Renderer API (also called FRAPI) exists for mods like Sodium, but its API is heavily limited and almost exclusively useful for complicated block models. Thus, Frappé was borne out of the desire for a cohesive, powerful renderer API.
Enter Frappé extensions. Frappé extensions are additional, optional APIs that renderers may opt into implementing. However, other mods may add support for features that renderers do not support (e.g. Sodium-Frappé Compatibility), and this is the primary advantage Frappé has over traditional renderer implementations and extensions.
Frappé's extension system is heavily inspired by Khronos Group's OpenGL and Vulkan extension APIs. In other words, "Extension query goes in, extension API comes out."
No, this is far out of scope. The primary concerns are maintainability and use-case, and FRAPI is already quite difficult to maintain when it breaks. Please do not bother the FRAPI developers.
No, absolutely not. Frappé's API is not in scope for individual renderer mods, and Mocha—Frappé's default Indigo and Sodium implementation—is licensed MPL-2.0. Unless an agreement is made on labor and licensing, Mocha/Frappé will remain a separate mod.
Frappé and Mocha: MPL-2.0
glsl-transformer: AGPL-3.0 and the additional license grant in licenses/glsl-transformer.md