import { BufferDescriptor, BufferId, GpuBackend, GpuBackendInfo, GpuViewport, Texture1DDescriptor, TextureId } from '../../types';
import { DrawList } from '../../drawList';
import { FrameUniforms } from '../../frame';

export interface WebGPUBackendOptions {
    powerPreference?: "low-power" | "high-performance";
    preferredFormat?: string;
}
export declare class WebGPUBackend implements GpuBackend {
    readonly info: GpuBackendInfo;
    private canvas;
    private opts;
    private viewport;
    private adapter;
    private device;
    private context;
    private format;
    private buffers;
    private textures;
    private trianglePipeline;
    private linePipeline;
    private pointPipeline;
    private bandPipeline;
    private heatmapPipeline;
    private heatmapBindGroups;
    constructor(canvas: HTMLCanvasElement, opts?: WebGPUBackendOptions);
    static isSupported(): boolean;
    init(): Promise<void>;
    setViewport(viewport: GpuViewport): void;
    createOrUpdateBuffer(id: BufferId, data: ArrayBufferView, desc?: Partial<BufferDescriptor>): void;
    deleteBuffer(id: BufferId): void;
    createOrUpdateTexture1D(id: TextureId, data: Uint8Array, desc?: Partial<Texture1DDescriptor>): void;
    deleteTexture(id: TextureId): void;
    /**
     * Initialize all pipelines lazily
     */
    private ensurePipelines;
    render(drawList: DrawList, frame: FrameUniforms): void;
    /**
     * Render with explicit bounds (for integration with chart system)
     */
    renderWithBounds(drawList: DrawList, frame: FrameUniforms, bounds: {
        xMin: number;
        xMax: number;
        yMin: number;
        yMax: number;
    }): void;
    /**
     * Render a single draw call
     */
    private renderDrawCall;
    /** Triangle list with line-pipeline uniforms (xy vertices, uniform color). */
    private renderSolidTriangles;
    private renderLine;
    private renderPoints;
    private renderBand;
    private renderHeatmap;
    destroy(): void;
}