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 variable_cache

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create_bitmap_font.js

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/*

This file is part of Espruino, a JavaScript interpreter for Microcontrollers

Copyright (C) 2013 Gordon Williams <gw@pur3.co.uk>

This Source Code Form is subject to the terms of the Mozilla Public

License, v. 2.0. If a copy of the MPL was not distributed with this

file, You can obtain one at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------------------------------------

Bitmap font header file creator

----------------------------------------------------------------------------------------

*/

// convert charset.png -depth 8 gray:charset.raw

pixels = require("fs").readFileSync("charset.raw");

var W=128;

var H=18;

var CW = 4;

var CWX = 3; // 1 of spaces

var CH = 6;

var packedChars = 5;

function genChar(xo,yo) {

var r = [];

for (var y=0;y<CH;y++) {

var idx = xo+((y+yo)*W);

var s = "";

for (var x=0;x<CWX;x++) {

s+= (pixels[idx++]>128) ? "_" : "X";

}

r.push(s);

}

return r;

}

var x=CW,y=0;

while (y < H) {

var chars = [];

for (var i=0;i<packedChars;i++) {

chars.push(genChar(x,y));

x += CW;

if (x>=W) {

x = 0;

y += CH;

}

}

for (var cy=0;cy<CH;cy++) {

var s = " PACK_5_TO_16( ";

for (i=0;i<packedChars;i++) {

if (i>0) s+=" , ";

s += chars[i][cy];

}

s += " ),";

console.log(s);

}

console.log("");

}