edec56e6c5
For (hopefully) better performance than creating a new v8::Context to wrap each callback while still avoiding leaking memory with v8::FunctionTemplate. Adds a JavaScript shim in front of module.exports.Map to wrap the req.respond API internally and preserve the public callback-passing API, while still exporting the correct prototype.
83 lines
2.4 KiB
JavaScript
83 lines
2.4 KiB
JavaScript
'use strict';
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var mbgl = require('../index');
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var request = require('request');
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mbgl.on('message', function(msg) {
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console.log('%s (%s): %s', msg.severity, msg.class, msg.text);
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});
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module.exports = function (style, options, callback) {
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var map = new mbgl.Map({
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ratio: options.pixelRatio,
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request: function(req, callback) {
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request(req.url, {encoding: null}, function (err, response, body) {
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if (err) {
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callback(err);
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} else if (response.statusCode != 200) {
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callback(new Error(response.statusMessage));
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} else {
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callback(null, {data: body});
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}
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});
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}
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});
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var timedOut = false;
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var watchdog = setTimeout(function () {
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timedOut = true;
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map.dumpDebugLogs();
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callback(new Error('timed out after 20 seconds'));
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}, 20000);
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options.center = style.center;
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options.zoom = style.zoom;
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options.bearing = style.bearing;
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options.pitch = style.pitch;
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options.debug = {
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tileBorders: options.debug,
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collision: options.collisionDebug,
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overdraw: options.showOverdrawInspector,
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};
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map.load(style);
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applyOperations(options.operations, function() {
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map.render(options, function (err, pixels) {
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var results = options.queryGeometry ?
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map.queryRenderedFeatures(options.queryGeometry) :
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[];
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map.release();
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if (timedOut) return;
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clearTimeout(watchdog);
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callback(err, pixels, results.map(prepareFeatures));
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});
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});
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function applyOperations(operations, callback) {
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var operation = operations && operations[0];
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if (!operations || operations.length === 0) {
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callback();
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} else if (operation[0] === 'wait') {
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var wait = function() {
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if (map.loaded()) {
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applyOperations(operations.slice(1), callback);
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} else {
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map.render(options, wait);
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}
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};
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wait();
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} else {
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map[operation[0]].apply(map, operation.slice(1));
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applyOperations(operations.slice(1), callback);
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}
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}
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function prepareFeatures(r) {
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delete r.layer;
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return r;
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}
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};
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