Targadactyl

A .tga file loader for Deno. (Forked from tga-js)

Usage Examples

Instantiate the TgaLoader class and pass an Uint8ClampedArray of image data to the load() method before attempting to get the canvas, image data or header information.

A TgaLoaderReferenceError will be thrown by TgaLoader.getImageData(), TgaLoader.getCanvas() and TgaLoader.header if the TGA file has not loaded prior to the method call.

Loading a Local .tga File

import TgaLoader from "https://deno.land/x/targadactyl@1.0.0/mod.ts";

const tga = new TgaLoader();

tga.load(
  await tga.open("./test/test.tga"),
);

Loading a Remote .tga File

import TgaLoader from "https://deno.land/x/targadactyl@1.0.0/mod.ts";

const tga = new TgaLoader();

const res = await fetch(
  "https://raw.githubusercontent.com/jasonjgardner/targadactyl/main/test/test.tga",
);
const buffer = res.arrayBuffer();

tga.load(
  new Uint8ClampedArray(buffer),
);

Serving a .tga File with Fresh

import { decode } from "https://deno.land/std@0.156.0/encoding/base64url.ts";
import {
  TgaLoader,
  TgaLoaderError,
} from "https://deno.land/x/targadactyl@1.0.0/mod.ts";

export const handler = async (
  _req: Request,
  ctx: HandlerContext,
): Promise<Response> => {
  try {
    const tga = new TgaLoader();

    tga.load(
      await tga.open(`./img/${ctx.params.tga}`),
    );

    const contentType = "image/png";

    return new Response(
      decode(tga.getDataURL(contentType)),
      {
        status: 200,
        headers: {
          "Content-Type": contentType,
        },
      },
    );
  } catch (err) {
    if (err instanceof TgaLoaderError) {
      return new Response(`Failed loading .tga image file: "${err}"`, {
        status: 404,
      });
    }

    return new Response("An unknown error has occurred.", { status: 500 });
  }
};