import type { FillRule, LineCap, LineJoin, LineStyle } from 'modern-path2d';
import type { Batchable2D, ColorValue } from '../../core';
import { Path2D } from 'modern-path2d';
import { Texture2D } from '../resources';
export type TransformUv = (uvs: Float32Array, index: number) => void;
export type TransformVertex = (vertices: Float32Array, index: number) => void;
export interface CanvasBatchable extends Batchable2D {
    type: 'stroke' | 'fill' | 'mesh';
    texture?: Texture2D;
    transformUv?: TransformUv;
    transformVertex?: TransformVertex;
    size?: {
        width: number;
        height: number;
    };
    /** mesh 显式 UV(0..1)，绕过「由顶点位置派生 UV」。 */
    meshUvs?: Float32Array;
}
export interface StrokeDraw extends Partial<CanvasBatchable> {
    type: 'stroke';
    path: Path2D;
    lineStyle: LineStyle;
    /** 流动速度（周期/秒，符号=方向）；发射 batchable 时经 encodeFlowSpeed 编成 effectParam。 */
    flow?: number;
}
export interface FillDraw extends Partial<CanvasBatchable> {
    type: 'fill';
    path: Path2D;
}
/** 自定义三角网格绘制：顶点(局部像素)+ 显式 UV(0..1) + 三角索引，不经路径三角化。 */
export interface MeshDraw extends Partial<CanvasBatchable> {
    type: 'mesh';
    vertices: Float32Array;
    indices: Uint32Array;
    meshUvs: Float32Array;
}
export declare class CanvasContext extends Path2D {
    fillStyle?: ColorValue | Texture2D;
    fillRule?: FillRule;
    strokeStyle?: ColorValue | Texture2D;
    strokeAlignment?: number;
    lineCap?: LineCap;
    lineJoin?: LineJoin;
    lineWidth?: number;
    miterLimit?: number;
    /** 描边流动效果速度（周期/秒，符号=方向；0/undefined=关闭）。见 flowStreakEffect。 */
    lineFlow?: number;
    transformUv?: TransformUv;
    transformVertex?: TransformVertex;
    protected _draws: (StrokeDraw | FillDraw | MeshDraw)[];
    protected _triCache: {
        sig: string;
        vertices: Float32Array;
        indices: Uint32Array;
        uvs?: Float32Array;
    }[];
    protected _parseDrawStyle(source?: ColorValue | Texture2D): {
        texture?: Texture2D;
    };
    stroke(options?: Partial<StrokeDraw>): void;
    /**
     * 绘制自定义三角网格（用当前 fillStyle 纹理）。顶点为局部像素坐标 [x,y,...]，
     * UV 为归一化 [u,v,...]（0..1），indices 为三角索引。用于精灵网格 / 骨骼网格变形。
     */
    drawMesh(vertices: ArrayLike<number>, uvs: ArrayLike<number>, indices: ArrayLike<number>): void;
    fillRect(x: number, y: number, width: number, height: number): void;
    strokeRect(x: number, y: number, width: number, height: number): void;
    fill(options?: Partial<FillDraw>): void;
    copyFrom(source: CanvasContext): this;
    resetStatus(): void;
    reset(): this;
    toBatchables(): CanvasBatchable[];
    destroy(): void;
}