GitHub - ybouane/LibRaw-Wasm: LibRaw WASM bindings to be able to use it in the browser.

import LibRaw from 'libraw-wasm';

const output = document.getElementById('output');
// Instantiate LibRaw
const raw = new LibRaw();
// Open (decode) the RAW file
await raw.open(new Uint8Array(fileBuffer), { /* settings */ });

// Fetch metadata
const meta = await raw.metadata(/* fullOutput=false */);
console.log('Metadata:', meta);
output.innerText = JSON.stringify(meta, null, 4);

// Fetch the decoded image data (RGB pixels)
const imageData = await raw.imageData();
console.log('Image data:', imageData);
console.log('Image data length:', imageData.length);

// Fetch the raw, undebayered sensor data (16-bit mosaic, no demosaicing)
const rawImageData = await raw.rawImageData();
console.log('Raw sensor data:', rawImageData); // { raw_width, raw_height, width, height, top_margin, left_margin, data: Uint16Array }

{
	bright: 1.0,			// -b <float> : brightness
	threshold: 0.0,			// -n <float> : wavelet denoise threshold
	autoBrightThr: 0.01,	// portion of clipped pixels for auto-brightening
	adjustMaximumThr: 0.75,	// auto-adjust max if channel overflow above threshold
	expShift: 1.0,			// exposure shift in linear scale (requires expCorrec=1)
	expPreser: 0.0,			// preserve highlights when expShift>1 (0..1)

	halfSize: false,		// -h  : output at 1/2 size
	fourColorRgb: false,	// -f  : separate interpolation for two green channels
	highlight: 0,			// -H  : highlight mode (0..9)
	useAutoWb: false,		// -a  : auto white balance
	useCameraWb: false,		// -w  : camera's recorded WB
	useCameraMatrix: 1,		// +M/-M : color profile usage (0=off,1=on if WB,3=always)
	outputColor: 1,			// -o  : output colorspace (0..8) (0=raw,1=sRGB,2=Adobe, etc.)
	outputBps: 8,			// -4  : 8 or 16 bits per sample
	outputTiff: false,		// -T  : output TIFF if true, else PPM
	outputFlags: 0,			// bitfield for custom output flags
	userFlip: -1,			// -t  : flip/rotate (0..7, default=-1 means use RAW value)
	userQual: 3,			// -q  : interpolation quality (0..12)
	userBlack: -1,			// -k  : user black level
	userCblack: [-1, -1, -1, -1], // per-channel black offsets
	userSat: 0,				// -S  : saturation level
	medPasses: 0,			// -m  : median filter passes
	noAutoBright: false,	// -W  : don't apply auto brightness
	useFujiRotate: -1,		// -j  : -1=use, 0=off, 1=on, for Fuji sensor rotation
	greenMatching: false,	// fix green channel imbalance (not a dcraw key)
	dcbIterations: -1,		// additional DCB passes (-1=off)
	dcbEnhanceFl: false,	// enhance color fidelity in DCB
	fbddNoiserd: 0,			// 0=off,1=light,2=full FBDD denoise
	expCorrec: false,		// enable exposure correction (then expShift, expPreser apply)
	noAutoScale: false,		// skip scale_colors (affects WB)
	noInterpolation: false,	// skip demosaic entirely (outputs raw mosaic)

	greybox: null,			// -A x y w h : rectangle (x,y,width,height) for WB calc
	cropbox: null,			// Cropping rectangle (left, top, w, h) applied before rotation
	aber: null,				// -C (red multiplier = aber[0], blue multiplier = aber[2])
	gamm: null,				// -g power toe_slope (1/power -> gamm[0], gamm[1] -> slope)
	userMul: null,			// -r mul0 mul1 mul2 mul3 : user WB multipliers (r, g, b, g2)

	outputProfile: null,	// -o <filename> : output ICC profile (if compiled w/ LCMS)
	cameraProfile: null,	// -p <filename> or 'embed' : camera ICC profile
	badPixels: null,		// -P <file> : file with bad pixels map
	darkFrame: null,		// -K <file> : file with dark frame (16-bit PGM)
}