File size: 1,129 Bytes
7e3630c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | import chalk from "chalk";
import type { PixelData } from "./types.js";
const ASCII_CHARS =
"$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\\|()1{}[]?-_+~<>i!lI;:,\"^`'. ";
export function renderAscii(
pixels: PixelData,
options: { colored?: boolean } = {},
): string {
const { data, info } = pixels;
const { width, height, channels } = info;
const colored = options.colored ?? true;
let result = "";
for (let y = 0; y < height; y++) {
for (let x = 0; x < width; x++) {
const pixelIndex = (y * width + x) * channels;
const r = data[pixelIndex] as number;
const g = data[pixelIndex + 1] as number;
const b = data[pixelIndex + 2] as number;
const a = channels === 4 ? (data[pixelIndex + 3] as number) : 255;
const sum = r + g + b + a;
const intensity = sum === 0 ? 0 : sum / (255 * 4);
const char =
ASCII_CHARS[
ASCII_CHARS.length -
1 -
Math.floor(intensity * (ASCII_CHARS.length - 1))
];
result += colored ? chalk.rgb(r, g, b)(char) : char;
}
result += "\n";
}
return result.slice(0, -1);
}
|