55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
'use strict';
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(function() {
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var socket = io();
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var canvas = document.getElementsByClassName('display')[0];
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var context = canvas.getContext('2d');
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var canvas_size_x = 100;
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var canvas_size_y = 100;
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socket.on('setting', onSetting);
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socket.on('draw', onDraw);
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window.addEventListener('resize', onResize, false);
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onResize();
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function onSetting(data) {
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canvas_size_x = data.canvas.size.x;
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canvas_size_y = data.canvas.size.y;
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}
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function drawLine(x0, y0, x1, y1, color){
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context.beginPath();
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context.moveTo(x0, y0);
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context.lineTo(x1, y1);
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context.strokeStyle = color;
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context.lineWidth = 2;
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context.stroke();
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context.closePath();
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}
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function drawPixel(x, y, color){
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context.fillStyle = color;
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context.fillRect(x - (canvas.width * (0.5/canvas_size_x)),y - (canvas.height * (0.5/canvas_size_y)), canvas.width * (1/canvas_size_x), canvas.height * (1/canvas_size_y));
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}
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function onDraw(data){
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var w = canvas.width;
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var h = canvas.height;
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if (data.type == 'pixel') {
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drawPixel((data.x / canvas_size_x) * w, (data.y / canvas_size_y) * h, data.color);
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}
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}
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// make the canvas fill its parent
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function onResize() {
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canvas.width = window.innerWidth;
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canvas.height = window.innerHeight;
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}
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})();
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