Function _read

test/jasmine/tests/scattergl_select_test.js:417–421

(query)

        var pad = 20;

        function _read(query) {
            var canvas = gd.querySelector(query);
            return readPixel(canvas, 0, 0, gd.layout.width, gd.layout.height)
                .reduce(function(acc, v) { return acc + v; }, 0);
        }

        function readContext() { return _read('.gl-canvas-context'); }