/**
 * Capture the current value into the cache slot so future `setUniform`
 * calls can short-circuit. Reuses the existing slot (and its allocation)
 * when the length matches — only a length change or a first capture
 * allocates a fresh array.
 * @ignore
 */
export function captureValue(prev: any, val: any): any;
/**
 * Build the `uniforms` proxy object for a compiled shader program.
 *
 * Each detected uniform gets a defineProperty getter (returns its
 * `WebGLUniformLocation`) and a setter that pushes the value to GL. The
 * setter caches the last value it sent and skips the underlying
 * `gl.uniform*` call when the incoming value matches — uniform writes are
 * cheap individually, but a typical per-frame draw pass sets a dozen of
 * them per shader, and most are layer-lifetime constants (`uMapSize`,
 * `uCellSize`, `uOpacity`, projection matrix on idle frames, etc.).
 *
 * Cache scope is per-shader: each `GLShader` calls `extractUniforms` once
 * and gets its own closure-captured `cache` map, so caches don't leak
 * across programs.
 * @ignore
 */
export function extractUniforms(gl: any, shader: any): {};
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