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Draw Multiple Canvas's to image & Copy Opacity of a Canvas layer if using CSS Style #122

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Draw Multiple Canvas's to image & Copy Opacity of a Canvas layer if using CSS Style #122

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2c1c72e
Update leaflet-image.js
Spaction Nov 2, 2018
c81adb8
Update leaflet-image.js
Spaction Nov 2, 2018
caedfb3
Update leaflet-image.js
Spaction Nov 2, 2018
202fca7
Opacity from existing Canvas's copied to image
Spaction Nov 8, 2018
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17 changes: 14 additions & 3 deletions leaflet-image.js
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Original file line number Diff line number Diff line change
Expand Up @@ -35,8 +35,14 @@ module.exports = function leafletImage(map, callback) {
if (map._pathRoot) {
layerQueue.defer(handlePathRoot, map._pathRoot);
} else if (map._panes) {
var firstCanvas = map._panes.overlayPane.getElementsByTagName('canvas').item(0);
if (firstCanvas) { layerQueue.defer(handlePathRoot, firstCanvas); }

var canvases = map._panes.overlayPane.getElementsByTagName('canvas');
if (canvases){
for(var i = 0;i<canvases.length;i++){
layerQueue.defer(handlePathRoot,canvases[i]);
}
}

}
map.eachLayer(drawMarkerLayer);
layerQueue.awaitAll(layersDone);
Expand Down Expand Up @@ -184,9 +190,14 @@ module.exports = function leafletImage(map, callback) {
canvas.width = dimensions.x;
canvas.height = dimensions.y;
var ctx = canvas.getContext('2d');
var opacity = root.style.opacity?root.style.opacity:1;
var pos = L.DomUtil.getPosition(root).subtract(bounds.min).add(origin);
try {
if(opacity!=1)
ctx.globalAlpha = opacity;
ctx.drawImage(root, pos.x, pos.y, canvas.width - (pos.x * 2), canvas.height - (pos.y * 2));
if(opacity!=1)
ctx.globalAlpha = 1;
callback(null, {
canvas: canvas
});
Expand Down Expand Up @@ -385,4 +396,4 @@ module.exports = function leafletImage(map, callback) {

}));
},{}]},{},[1])(1)
});
});