Function processFileByFormat

optimize.js:133–161

({ fileBuffer, config, isLossless })

}

async function processFileByFormat({ fileBuffer, config, isLossless }) {
	const imageMetadata = await parseImageMetadata(fileBuffer);

	if (!imageMetadata.format) {
		throw new Error('Unknown file format');
	}

	switch (imageMetadata.format) {
		case 'jpeg': {
			return processJpeg({ fileBuffer, config, isLossless });
		}

		case 'png': {
			return processPng({ fileBuffer, config, isLossless });
		}

		case 'gif': {
			return processGif({ fileBuffer, config, isLossless });
		}

		case 'svg': {
			return processSvg({ fileBuffer, config });
		}

		default: {
			throw new Error(`Unsupported image format: "${imageMetadata.format}"`);
		}
	}
}

async function processJpeg({ fileBuffer, config, isLossless }) {
	const sharpImage = sharp(fileBuffer)