index.js•906 B
import GIF from "omggif";
import { GifUtil, GifFrame, BitmapImage, GifCodec } from "gifwrap";
const MIME_TYPE = "image/gif";
export default () => ({
mime: { [MIME_TYPE]: ["gif"] },
constants: {
MIME_GIF: MIME_TYPE,
},
decoders: {
[MIME_TYPE]: (data) => {
const gifObj = new GIF.GifReader(data);
const gifData = Buffer.alloc(gifObj.width * gifObj.height * 4);
gifObj.decodeAndBlitFrameRGBA(0, gifData);
return {
data: gifData,
width: gifObj.width,
height: gifObj.height,
};
},
},
encoders: {
[MIME_TYPE]: (data) => {
const bitmap = new BitmapImage(data.bitmap);
GifUtil.quantizeDekker(bitmap, 256);
const newFrame = new GifFrame(bitmap);
const gifCodec = new GifCodec();
return gifCodec.encodeGif([newFrame], {}).then((newGif) => {
return newGif.buffer;
});
},
},
});