image-in-browser/lib/formats/tga-encoder.js

Package for encoding / decoding images, transforming images, applying filters, drawing primitives on images on the client side (no need for server Node.js)

import { OutputBuffer } from '../common/output-buffer.js';
export class TgaEncoder {
    constructor() {
        this._supportsAnimation = false;
    }
    get supportsAnimation() {
        return this._supportsAnimation;
    }
    encode(opt) {
        var _a, _b;
        const image = opt.image;
        const out = new OutputBuffer({
            bigEndian: true,
        });
        const header = new Uint8Array(18);
        header.fill(0);
        header[2] = 2;
        header[12] = image.width & 0xff;
        header[13] = (image.width >>> 8) & 0xff;
        header[14] = image.height & 0xff;
        header[15] = (image.height >>> 8) & 0xff;
        const nc = (_b = (_a = image.palette) === null || _a === void 0 ? void 0 : _a.numChannels) !== null && _b !== void 0 ? _b : image.numChannels;
        header[16] = nc === 3 ? 24 : 32;
        out.writeBytes(header);
        if (nc === 4) {
            for (let y = image.height - 1; y >= 0; --y) {
                for (let x = 0; x < image.width; ++x) {
                    const c = image.getPixel(x, y);
                    out.writeByte(Math.trunc(c.b));
                    out.writeByte(Math.trunc(c.g));
                    out.writeByte(Math.trunc(c.r));
                    out.writeByte(Math.trunc(c.a));
                }
            }
        }
        else {
            for (let y = image.height - 1; y >= 0; --y) {
                for (let x = 0; x < image.width; ++x) {
                    const c = image.getPixel(x, y);
                    out.writeByte(Math.trunc(c.b));
                    out.writeByte(Math.trunc(c.g));
                    out.writeByte(Math.trunc(c.r));
                }
            }
        }
        return out.getBytes();
    }
}
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