function pngChunkRefined
pngChunkRefined(): Coder<
>

Creates a coder for PNG chunks with type-specific refinement.

This coder automatically detects the chunk type and applies the appropriate refiner, transforming raw chunk data into structured objects for known chunk types (IHDR, PLTE, tRNS, bKGD, IDAT, IEND). Unknown chunk types are passed through as PngChunkUnknown.

Examples

Decode a PNG with refined chunks

import { assert } from "@std/assert";
import { pngChunkRefined, pngFileChunks } from "@binstruct/png";

const coder = pngFileChunks(pngChunkRefined());

// When decoding a PNG file, chunks will be automatically refined
// to their specific types (IhdrChunk, PlteChunk, etc.)
assert(typeof coder.decode === "function");
assert(typeof coder.encode === "function");

Return Type

A coder that produces refined chunk types based on the chunk's type field.

Usage

import { pngChunkRefined } from ".";