@thi.ng/rasterize/shader.d.ts

Headless 2D shape drawing, filling & rasterization for arbitrary targets/purposes (no canvas required)

import type { IGrid2D, NumericArray, TypedArray } from "@thi.ng/api";
import type { BlendFnF, BlendFnI, ReadonlyColor } from "@thi.ng/porter-duff";
import type { IRandom } from "@thi.ng/random";
import type { Shader2D } from "./api.js";
export declare const defPattern: <T extends any[] | TypedArray, P>(pattern: IGrid2D<T, P>) => Shader2D<P>;
export interface StripeShaderOpts<T> {
    dir: "h" | "v" | "d";
    size: number;
    sizeA: number;
    a: T;
    b: T;
}
export declare const defStripes: <T = number>({ dir, size, sizeA, a, b, }: StripeShaderOpts<T>) => Shader2D<T>;
export interface RandomShaderOpts<T> {
    probability?: number;
    rnd?: IRandom;
    a: T;
    b: T;
}
export declare const defNoise: <T = number>(opts: RandomShaderOpts<T>) => Shader2D<T>;
/**
 * Defines a shader (for floating point target buffers) which blends given color
 * (or another shader) with a Porter-Duff operator. Unless `isPremultiplied` is
 * true, both the given color and existing pixel values in the target buffer are
 * considered non-premultiplied.
 *
 * @remarks
 * The default PD blend op is `SRC_OVER_I`. See
 * [@thi.ng/porter-duff](https://thi.ng/porter-duff) for more info.
 *
 * See {@link defBlendI} for integer based buffers.
 *
 * @param col
 * @param blend
 * @param isPremultiplied
 */
export declare const defBlendF: (col: ReadonlyColor | Shader2D<NumericArray>, blend?: BlendFnF, isPremultiplied?: boolean) => Shader2D<NumericArray>;
/**
 * Similar to {@link defBlendF}, but for integer based target buffers. Defines a
 * shader which blends given color (or another shader) with a Porter-Duff
 * operator. Unless `isPremultiplied` is true, both the given color and existing
 * pixel values in the target buffer are considered non-premultiplied.
 *
 * @remarks
 * The default PD blend op is `SRC_OVER_I`. See
 * [@thi.ng/porter-duff](https://thi.ng/porter-duff) for more info.
 *
 * @param col
 * @param blend
 * @param isPremultiplied
 */
export declare const defBlendI: (col: number | Shader2D<number>, blend?: BlendFnI, isPremultiplied?: boolean) => Shader2D<number>;
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