This module can generate both barcode and pattern markers.
MarkerModule.getBarcodeMarkerSVGDataURI(matrixTypeId, value)
Use this method to create a barcode image from a value.
Accepts a matrix type (see exported MATRIX_* constants) and a value and returns a data URI string,
representing an SVG of the barcode marker.
Supported matrix types (values start from 0):
| Matrix type | Max value |
|---|---|
3x3_hamming_6_3 |
7 |
3x3_parity_6_5 |
31 |
4x4_bch_13_5_5 |
31 |
4x4_bch_13_9_3 |
511 |
5x5_bch_22_7_7 |
128 |
5x5_bch_22_12_5 |
4095 |
MarkerModule.getMarkerPattern(dataURI)
Use this method to create a .patt file from an image.
Accepts an image as a data URI string and returns a string for the .patt file.
MarkerModule.getFullMarkerImage(dataURI, ratio, size, color)
Use this method to create the marker image with border from an image. Accepts an image as a data URI string, size, ratio and border color for the marker and returns a data URI string representing the final marker image.
const { MarkerModule, MATRIX_3X3_HAMMING_63 } = ARjsStudioBackend;
// generate an SVG data URI for the value '7'
const barcodeMarkerSVG = MarkerModule.getBarcodeMarkerSVGDataURI(MATRIX_3X3_HAMMING_63, 7);
const barcodeImage = new Image();
barcodeImage.src = barcodeMarkerSVG; // use the image 'load' event to know when image is ready
// ----
// draw the image on an off-screen canvas and use `.toDataURL()` to get a data URI
const fullMarker = await MarkerModule.getFullMarkerImage(imageDataURI, 1.0, 100, 'black');
const pattFile = await MarkerModule.getMarkerPattern(imageDataURI);
const patternImage = new Image();
patternImage.src = fullMarker;
// use the image 'load' event to know when image is ready
patternImage.addEventListener('load', () => {
document.body.appendChild(patternImage);
})
const pattFileDownload = document.createElement('a');
pattFileDownload.href = `data:text/plain;charset=utf-8,${pattFile}`;
pattFileDownload.download = 'marker.patt'; // filename
pattFileDownload.click(); // trigger download