@shader-core/layers

Composable animated background layers for Shader Core — GLSL sources, schemas, preset stacks, and the first-party helper library they are built on.

Data only: no runtime dependencies, and one module per layer so importing a gradient and a grain costs a gradient and a grain.

import { definition, defaultParams } from '@shader-core/layers/gradient';
import { primitives } from '@shader-core/layers/primitives';
import { manifest } from '@shader-core/layers/manifest';

The layers

Bases (opaque, sit at the bottom of a stack) — gradient, mesh, marble, frost, contours, silk, terrain, maze, rings, sheen.

Light (additive, need something beneath) — curtains, caustics, rays, glow, ribbon.

Pattern (a shape rather than a field, so it sits over anything) — halftone, solid.

Finishing (multiply over everything below) — grain, vignette, grade.

Filter (transforms everything below; goes last) — tone.

Twenty preset stacks combine them, reachable through manifest.presets.

Layers, not shaders

A layer is a function, not a program. It declares L_-prefixed uniforms and one vec4 L_main(vec2 uv); the composer in @shader-core/engine rewrites that prefix per stack position and generates the main() that blends them. That is why the same layer can appear twice in a stack without colliding.

A filter declares vec3 L_filter(vec3 color, vec2 uv) in place of L_main. It is handed the linear colour accumulated beneath it and returns a replacement, which then blends like any other layer — how a tone curve fits in one pass.

Everything here is written from scratch — hashing, noise, colour encoding and dither included. See OWNERSHIP.md.

Licence

Free to use, including commercially. The credit comment stays in shader source you copy. See LICENSE.md.