/**
 * By default rendering goes through a 4x multisampled attachment (guaranteed
 * to be supported by WebGPU) that is resolved into the canvas, so geometric
 * edges of triangulated marks get antialiased without per-shader work.
 * `wgOptions.sampleCount = 1` renders directly into the canvas instead.
 */
export declare const defaultSampleCount = 4;
/** WebGPU render attachments only support 1 or 4 samples portably. */
export declare function normalizeSampleCount(value: number): number;
export declare function preferredColorFormat(): GPUTextureFormat;
export declare function createRenderPipeline(name: string, device: GPUDevice, shader: GPUShaderModule, format: GPUTextureFormat, sampleCount: number, buffers: GPUVertexBufferLayout[], blend: GPUBlendState, fragmentEntryPoint?: string): GPURenderPipeline;
/**
 * A pipeline's bind group layout at `index`. Every bind group made for the
 * pipeline needs it, and asking the pipeline makes a new one each time.
 */
export declare function bindGroupLayout(pipeline: GPURenderPipeline, index: number): GPUBindGroupLayout;
/** A texture's default view, made once rather than for every pass or bind group. */
export declare function viewOf(texture: GPUTexture): GPUTextureView;
/**
 * The group 0 bind group every mark pipeline takes: the shared uniform block
 * and the clip path's coverage.
 *
 * The mask is not optional. Every shader built on `uniformBlock` declares it
 * and every fragment entry reads it, so a call that left it out would build a
 * bind group short of an entry the layout has, and WebGPU throws out the whole
 * command buffer for that: the frame comes out blank and the reason goes to
 * `onuncapturederror` rather than failing anything. `clipMaskView` hands back
 * a placeholder where there is no clip, so there is always one to pass.
 */
export declare function createUniformBindGroup(name: string, device: GPUDevice, pipeline: GPURenderPipeline, uniforms: GPUBuffer, clipMask: GPUTextureView): GPUBindGroup;
/** The bilinear, edge-clamped sampler text and gradient ramps read through. */
export declare function linearSampler(device: GPUDevice): GPUSampler;
/** The group 1 bind group of a textured pipeline: its sampler and its texture. */
export declare function textureBindGroup(device: GPUDevice, label: string, pipeline: GPURenderPipeline, sampler: GPUSampler, view: GPUTextureView): GPUBindGroup;
/** A texture an image or a rasterized label is copied into. */
export declare function imageTexture(device: GPUDevice, label: string, width: number, height: number, mipLevelCount?: number): GPUTexture;
/**
 * Copies a region of a canvas or bitmap into a texture, kept premultiplied.
 * Straight alpha turns a fully transparent texel black, and filtering then
 * drags the colour next to it toward that, darkening the edge. The shaders
 * divide the alpha back out after sampling.
 */
export declare function uploadImage(device: GPUDevice, source: HTMLCanvasElement | ImageBitmap, texture: GPUTexture, width: number, height: number, origin?: [x: number, y: number], mipLevel?: number): void;