Tauri read pdf and extract images

gistfile1.txt

readBinaryFile(event.payload[0]).then(async (data) => {
        pdfjsLib.getDocument(data.buffer).promise.then((pdf) => {
          pdf.getPage(1).then((page) => {
            page.getOperatorList().then((ops) => {
              const fns = ops.fnArray;
              const args = ops.argsArray;

              const validObjectTypes = [
                pdfjsLib.OPS.paintImageXObject, // 85
                pdfjsLib.OPS.paintImageXObjectRepeat, // 88,
              ];

              args.forEach((arg, i) => {
                if (!validObjectTypes.includes(fns[i])) {
                  return;
                }

                page.objs.get(arg[0], async (image: any) => {
                  const imageUnit8Array = image.data;
                  const imageWidth = image.width;
                  const imageHeight = image.height;

                  const imageUint8ArrayWithAlphaChanel = addAlphaChannelToUnit8ClampedArray(imageUnit8Array, imageWidth, imageHeight);
                  const imageData = new ImageData(imageUint8ArrayWithAlphaChanel, imageWidth, imageHeight);

                  const canvas = document.createElement('canvas');
                  const ctx = canvas.getContext('2d');
                  canvas.width = imageWidth;
                  canvas.height = imageHeight;

                  if (ctx) {
                    ctx.putImageData(imageData, 0, 0);

                    const data = ctx.canvas.toDataURL();

                    setImgList((imgList) => [...imgList, data]);
                  }
                });
              });
            });
            //
            // const scale = 1;
            // const viewport = page.getViewport({ scale });
            //
            // page.getOperatorList().then((opList) => {
            //   const svgGfx = new pdfjsLib.SVGGraphics(page.commonObjs, page.objs);
            //
            //   svgGfx.getSVG(opList, viewport).then((svg) => {
            //     // @ts-ignore
            //     document.body.appendChild(svg);
            //   });
            // });
          });
        });
      });