Write pixels to the terminal using ANSI colors and half-characters. Try it here.
Verified to work in Windows CMD, Git Bash, xterm, and more.
You can see it yourself by running img-test.js.
I'm kinda cheating. Using special characters (namely ▀ █ and ▄) we're able to write an approximation of actual pixels to the terminal.
var termPx = require('term-px');
/*
default usage
*/
var pixels = termPx([0,0,0],[255,255,255])
// => '\u001b[97;40m▄\u001b[0m'
// => <black on top and white on bottom>
// provide an options object with "format" set to "rgb" for use in full color terminals
var rgbPixels = termPx([0x9A,0x00,0xC4],[0xBB,0x00,0xC4],{format:"rgb"});
// => "\u001b[38;2;154;0;196;48;2;187;0;196m▀\u001b[0m"
// <two slightly different purples>
// set "reset" to false to not reset the color at the end.
var unClosedRgbPixels = termPx([0x9A,0x00,0xC4],[0xBB,0x00,0xC4],{format:"rgb",reset:false});
// => "\u001b[38;2;154;0;196;48;2;187;0;196m▀"
/*
Preparing images:
*/
// Image data must be in RGBA 0-255 format, and have data and width keys.
var bmp = require("bmp-js");
var bmpBuffer = fs.readFileSync('aa.bmp');
var bmpData = bmp.decode(bmpBuffer); // {data:[255,0,255,255,...],width:10,height:20}
var logo = termPx.convertImage(bmpData,{format:"rgb"});
// => (a massive String)
process.stdout.write(logo)
// logo is shown