77 lines
2.8 KiB
JavaScript
77 lines
2.8 KiB
JavaScript
import { codecs as supportedFormats, preprocessors } from "./codecs";
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import ImageData from "./image_data";
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export async function decodeBuffer(_buffer) {
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var _Object_entries_find;
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const buffer = Buffer.from(_buffer);
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const firstChunk = buffer.slice(0, 16);
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const firstChunkString = Array.from(firstChunk).map((v)=>String.fromCodePoint(v)).join("");
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const key = (_Object_entries_find = Object.entries(supportedFormats).find(([, { detectors }])=>detectors.some((detector)=>detector.exec(firstChunkString)))) == null ? void 0 : _Object_entries_find[0];
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if (!key) {
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throw Error(`Buffer has an unsupported format`);
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}
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const encoder = supportedFormats[key];
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const mod = await encoder.dec();
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const rgba = mod.decode(new Uint8Array(buffer));
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return rgba;
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}
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export async function rotate(image, numRotations) {
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image = ImageData.from(image);
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const m = await preprocessors["rotate"].instantiate();
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return await m(image.data, image.width, image.height, {
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numRotations
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});
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}
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export async function resize({ image, width, height }) {
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image = ImageData.from(image);
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const p = preprocessors["resize"];
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const m = await p.instantiate();
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return await m(image.data, image.width, image.height, {
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...p.defaultOptions,
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width,
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height
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});
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}
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export async function encodeJpeg(image, { quality }) {
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image = ImageData.from(image);
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const e = supportedFormats["mozjpeg"];
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const m = await e.enc();
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const r = await m.encode(image.data, image.width, image.height, {
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...e.defaultEncoderOptions,
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quality
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});
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return Buffer.from(r);
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}
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export async function encodeWebp(image, { quality }) {
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image = ImageData.from(image);
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const e = supportedFormats["webp"];
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const m = await e.enc();
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const r = await m.encode(image.data, image.width, image.height, {
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...e.defaultEncoderOptions,
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quality
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});
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return Buffer.from(r);
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}
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export async function encodeAvif(image, { quality }) {
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image = ImageData.from(image);
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const e = supportedFormats["avif"];
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const m = await e.enc();
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const val = e.autoOptimize.min || 62;
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const r = await m.encode(image.data, image.width, image.height, {
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...e.defaultEncoderOptions,
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// Think of cqLevel as the "amount" of quantization (0 to 62),
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// so a lower value yields higher quality (0 to 100).
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cqLevel: Math.round(val - quality / 100 * val)
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});
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return Buffer.from(r);
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}
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export async function encodePng(image) {
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image = ImageData.from(image);
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const e = supportedFormats["oxipng"];
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const m = await e.enc();
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const r = await m.encode(image.data, image.width, image.height, {
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...e.defaultEncoderOptions
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});
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return Buffer.from(r);
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}
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//# sourceMappingURL=impl.js.map
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