dmxm/node-red-contrib-jwht-map
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Make greyscale wms slightly lighter

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(more suitable for backgrounds)
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Dave Conway-Jones 2019-03-31 17:44:08 +01:00
parent c202e80ec1
commit eda12d207b
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GPG Key ID: 9E7F9C73F5168CD4
2 changed files with 4 additions and 3 deletions
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2
worldmap.js
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@ -142,7 +142,7 @@ module.exports = function(RED) {
client.on('close', function() {
delete clients[client.id];
node.status({fill:"green",shape:"ring",text:"connected "+Object.keys(clients).length,_sessionid:client.id});
node.send({payload:{action:"disconnect", clients:Object.keys(clients).length}, topic:"worldmap", _sessionid:client.id});
node.send({payload:{action:"disconnect", clients:Object.keys(clients).length}, topic:node.path.substr(1), _sessionid:client.id});
});
}

5
worldmap/leaflet/TileLayer.GrayscaleWMS.js
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@ -35,8 +35,9 @@ L.TileLayer.GrayWMS = L.TileLayer.WMS.extend({
var imgd = ctx.getImageData(0, 0, this._layer.options.tileSize, this._layer.options.tileSize);
var pix = imgd.data;
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i] = pix[i + 1] = pix[i + 2] = (3 * pix[i] + 4 * pix[i + 1] + pix[i + 2]) / 8;
//pix[i] = pix[i + 1] = pix[i + 2] = (2 * pix[i] + 3 * pix[i + 1] + 3 * pix[i + 2]) / 6;
//pix[i] = pix[i + 1] = pix[i + 2] = (3 * pix[i] + 4 * pix[i + 1] + pix[i + 2]) / 8;
// Lighten the scale slightly to make markers more obvious
pix[i] = pix[i + 1] = pix[i + 2] = (3 * pix[i] + 4 * pix[i + 1] + pix[i + 2]) / 8 * 3 / 4 + 64;
}
ctx.putImageData(imgd, 0, 0);
this.removeAttribute("crossorigin");