pixelbox/Texture/minitext.js

A framework to fast-prototype pixel-based games

var createCanvas = require('../domUtils/createCanvas');

var CHAR_WIDTH  = 4;
var CHAR_HEIGHT = 6;

var MINITEXT = [
	// 219,   438,   511,   14016, 14043, 14326, 14335, 28032, 28123, 28086, 28159, 32704, 32731, 32758, 32767, 128,
	// 146,   384,   402,   9344,  9362,  9600,  9618,  192,   210,   448,   466,   9408,  9426,  9664,  9682,  32767,
	0,     8338,  45,    11962, 5588,  21157, 29354, 10,    17556, 5265,  21973, 1488,  5312,  448,   13824, 5268,
	31599, 29843, 29671, 31143, 18925, 31183, 31689, 18735, 31727, 18927, 1040,  5136,  17492, 3640,  5393,  8359,
	25450, 23530, 31467, 25166, 15211, 29391, 4815,  27470, 23533, 29847, 15142, 23277, 29257, 23421, 23403, 11114,
	4843,  26474, 23279, 14798, 9367,  27501, 12141, 24429, 23213, 14829, 29351, 25750, 17553, 13459, 9402,  28672,
	34,    23530, 31467, 25166, 15211, 29391, 4815,  27470, 23533, 29847, 15142, 23277, 29257, 23421, 23403, 11114,
	4843,  26474, 23279, 14798, 9367,  27501, 12141, 24429, 23213, 14829, 29351, 25686, 9362,  13587, 42,    21845
];

//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
function createDefaultCharsetImage() {
	var canvas = createCanvas(64, 36);
	var ctx = canvas.getContext('2d');

	ctx.fillStyle = '#FFF';
	for (var c = 0; c < MINITEXT.length; c++) {
		var code = MINITEXT[c];

		var i = c % 16;
		var j = ~~(c / 16);

		for (var bit = 0; bit < 15; bit++) {
			var x = bit % 3;
			var y = ~~(bit / 3);
			var pixel = (code >> bit) & 1;
			if (pixel !== 1) continue;
			ctx.fillRect(i * CHAR_WIDTH + x, j * CHAR_HEIGHT + y, 1, 1);
		}
	}
	return canvas;
}

module.exports = createDefaultCharsetImage;