Autodesk Forge get screenshot with markups - autodesk-forge

Question

I have a markup extension for autodesk forge viewer. I want to get a screenshot with markups, but only got screenshot without markups.
I try to get screenshot with this code:
let getScreenShoot = document.getElementById('getScreenShoot')
getScreenShoot.addEventListener('click', () => {
let screenshot = new Image();
markup.leaveEditMode();
markupsData = JSON.parse(localStorage.getItem('markupsData'));
markupsData.map((mark, index) => {
markup.loadMarkups(mark, `markups-svg + ${index}`);
});
let canvas = document.getElementById('snapshot');
canvas.width = viewer.container.clientWidth;
canvas.height = viewer.container.clientHeight;
let ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(screenshot, 0, 0, canvas.width, canvas.height);
markup.renderToCanvas(ctx);
viewer.getScreenShot(viewer.container.clientWidth, viewer.container.clientHeight, function (blobURL) {
screenshot.src = blobURL;
var saveImg = document.createElement('a');
screenshot.appendChild(saveImg);
saveImg.style.display = 'none';
saveImg.href = blobURL;
saveImg.download = "screenshot.jpg";
document.body.appendChild(saveImg);
saveImg.click();
markup.hide();
markup.leaveEditMode();
markupTools.style.display = 'none';
});
})
Why doesn't my code work, is it maybe not supported in viewer 7?

Answer 1

Please use the following way to call renderToCanvas, since the rerender job is async process internally and the image loading is async, too.
markup.renderToCanvas(ctx, function() {
var canvas = document.getElementById('snapshot');
const a = document.createElement('a');
//a.style = 'display: none';
document.body.appendChild(a);
a.href = canvas.toDataURL();
a.download = 'markup.png';
a.click();
document.body.removeChild(a);
}, true);
The full code:
function snaphot() {
var screenshot = new Image();
screenshot.onload = function () {
viewer.loadExtension('Autodesk.Viewing.MarkupsCore').then(function (markupCore) {
// load the markups
markupCore.show();
markupCore.loadMarkups(markupSVG, "layerName");
// ideally should also restore the state of Viewer for this markup
// prepare to render the markups
var canvas = document.getElementById('snapshot');
canvas.width = viewer.container.clientWidth;
canvas.height = viewer.container.clientHeight;
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(screenshot, 0, 0, canvas.width, canvas.height);
markupCore.renderToCanvas(ctx, function() {
// hide the markups
//markupCore.hide();
var canvas = document.getElementById('snapshot');
const a = document.createElement('a');
//a.style = 'display: none';
document.body.appendChild(a);
a.href = canvas.toDataURL();
a.download = 'markup.png';
a.click();
document.body.removeChild(a);
}, true);
// hide the markups
markupCore.hide();
});
};
// Get the full image
viewer.getScreenShot(viewer.container.clientWidth, viewer.container.clientHeight, function (blobURL) {
screenshot.src = blobURL;
});

Answer 2

by making "false" inside markupCore.renderToCanvas is working for me. #shohag sarkar
markupCore.renderToCanvas(ctx, function() {
document.body.removeChild(a);
}, false);
// hide the markups
markupCore.hide();
});
};