// Deterministic image buffers for plugin SDK media tests.

import { deflateSync } from "node:zlib";

import { encodePngRgb, encodePngRgba } from "../../media/png-encode.js";

};

const PNG_SIGNATURE = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);

// Minimal valid JPEG used when tests only need container detection.

const TINY_JPEG = Buffer.from(

"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",

"base64",

return pixels;

}

/** Create a solid-color PNG buffer, preserving alpha only when needed. */

export function createSolidPngBuffer(width: number, height: number, color: Rgba): Buffer {

if (color.a === undefined || color.a === 255) {

return encodePngRgb(fillSolidRgb(width, height, color), width, height);

}

return encodePngRgba(fillSolidRgba(width, height, color), width, height);

}

/** Create a deterministic RGB PNG with varied pixel values. */

export function createNoisyPngBuffer(width: number, height: number): Buffer {

const rgba = createNoisyRgbaBuffer(width, height);

const rgb = Buffer.alloc(width * height * 3);

return encodePngRgb(rgb, width, height);

}

/** Create a grayscale+alpha PNG for image paths that must handle non-RGB color types. */

export function createGrayscaleAlphaPngBuffer(width: number, height: number): Buffer {

const stride = width * 2;

const raw = Buffer.alloc((stride + 1) * height);

]);

}

/** Return a tiny valid JPEG fixture buffer. */

export function createTinyJpegBuffer(): Buffer {

return Buffer.from(TINY_JPEG);

}

/** Create deterministic RGBA pixels for encoder and media conversion tests. */

export function createNoisyRgbaBuffer(width: number, height: number): Buffer {

const pixels = Buffer.alloc(width * height * 4);

for (let offset = 0; offset < pixels.length; offset += 4) {