42 lines
1.0 KiB
TypeScript
42 lines
1.0 KiB
TypeScript
import { applyExifOrientation } from "./exif-orientation.ts";
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import { loadPhoton } from "./photon.ts";
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/**
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* Convert image to PNG format for terminal display.
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* Kitty graphics protocol requires PNG format (f=100).
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*/
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export async function convertToPng(
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base64Data: string,
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mimeType: string,
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): Promise<{ data: string; mimeType: string } | null> {
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// Already PNG, no conversion needed
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if (mimeType === "image/png") {
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return { data: base64Data, mimeType };
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}
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const photon = await loadPhoton();
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if (!photon) {
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// Photon not available, can't convert
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return null;
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}
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try {
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const bytes = new Uint8Array(Buffer.from(base64Data, "base64"));
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const rawImage = photon.PhotonImage.new_from_byteslice(bytes);
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const image = applyExifOrientation(photon, rawImage, bytes);
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if (image !== rawImage) rawImage.free();
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try {
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const pngBuffer = image.get_bytes();
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return {
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data: Buffer.from(pngBuffer).toString("base64"),
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mimeType: "image/png",
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};
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} finally {
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image.free();
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}
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} catch {
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// Conversion failed
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return null;
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}
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}
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