import type { ElementRect } from "../rect.js";
import type { EffectDims } from "../types.js";
import type { Transition, TransitionEase, TransitionEffectContext, TransitionRun, TransitionUniforms } from "./types.js";
/**
 * A transition made of one shader.
 * `frag` defines `vec4 transition(vec2 uv, float t)` and reads the two sides with `readFrom` / `readTo`.
 */
export declare abstract class ShaderTransition<P extends object = object> implements Transition {
    #private;
    abstract readonly name: string;
    abstract readonly frag: string;
    ease?: TransitionEase;
    overflow?: true | number;
    params: P;
    constructor(params?: P);
    /** Uniforms for this frame. Read `this.params` here. */
    uniforms(_ctx: TransitionEffectContext): TransitionUniforms;
    start(run: TransitionRun): void;
    end(): void;
    outputRect(dims: EffectDims): ElementRect | undefined;
    render(ctx: TransitionEffectContext): void;
}