Function convertFont

packages/core/src/conversion.ts:49–90

(
	ctx: FontContext,
	buffer: Uint8Array,
	formats: FontFileFormat[],
	name?: string,
)

 * @returns A promise that resolves to an array of conversion results with data and filenames.
 */
export const convertFont = async (
	ctx: FontContext,
	buffer: Uint8Array,
	formats: FontFileFormat[],
	name?: string,
): Promise<ConversionResult[]> => {
	const { glyphtContext, compressionContext } = ctx;
	const uniqueFormats = [...new Set(formats)];

	// Identify and decompress compressed inputs to get a raw TTF buffer.
	const type = WoffCompressionContext.compressionType(buffer);
	const ttfBuffer = type
		? await compressionContext.decompressToTTF(buffer)
		: buffer;

	const baseName = name
		? stripExtension(name)
		: await deriveBaseName(glyphtContext, ttfBuffer);

	return Promise.all(
		uniqueFormats.map(async (format): Promise<ConversionResult> => {
			if (format === 'ttf') {
				return {
					filename: `${baseName}.ttf`,
					format: 'ttf',
					data: ttfBuffer,
				};
			}

			// Recompress the TTF buffer into the requested webfont format.
			const data = await compressionContext.compressFromTTF(ttfBuffer, {
				algorithm: format,
			});

			return {
				filename: `${baseName}.${format}`,
				format,
				data,
			};
		}),
	);
};