import { Color, Sprite, ColorRepresentation } from 'three/webgpu';
import { DIVEComponent } from '../../engine/component/Component.ts';
import { DIVENode } from '../../engine/node/Node.ts';
/**
 * A camera facing text label on a node.
 *
 * The text is rasterized to a canvas and applied to a sprite, so the label always
 * faces the camera while keeping a constant height in world units. `textHeight`
 * is that height, and the width follows from the rasterized aspect ratio.
 *
 * Where the label sits is the node's business, as with every component: position
 * the node, not the sprite. What belongs here is what the label *is* -- its text,
 * its height and its colour.
 *
 * Takes the owner's layer, so a caller decides what the label counts as by setting
 * it on the node before attaching. Layers gate only the object they are set on, so
 * the mask has to reach the sprite itself, which is what this does.
 *
 * @module
 */
export declare class SpriteTextComponent extends DIVEComponent {
    readonly isSpriteTextComponent: true;
    private _text;
    private _textHeight;
    private _color;
    private _canvas;
    private _texture;
    private _sprite;
    constructor();
    /** The sprite the label is drawn on. */
    get sprite(): Sprite;
    /** The text currently drawn. */
    get text(): string;
    /** The label's height in world units. */
    get textHeight(): number;
    /** The colour the text is rasterized in. */
    get color(): Color;
    /**
     * @param text - What to write.
     */
    setText(text: string): this;
    /**
     * @param textHeight - The label's height in world units.
     */
    setTextHeight(textHeight: number): this;
    /**
     * @param color - The colour to rasterize the text in.
     */
    setColor(color: ColorRepresentation): this;
    protected onAttach(owner: DIVENode): void;
    copy(source: this): this;
    dispose(): void;
    /**
     * Rasterizes the text to the canvas and scales the sprite to the resulting
     * aspect ratio, so the label's height matches its text height in world units.
     */
    private _draw;
}