// Copyright (C) 2003-2026, Foxit Software Inc..
// All Rights Reserved.
//
// http://www.foxitsoftware.com
//
// The following code is copyrighted and contains proprietary information and trade secrets of Foxit Software Inc..
// You cannot distribute any part of Foxit PDF SDK to any third party or general public,
// unless there is a separate license agreement with Foxit Software Inc. which explicitly grants you such rights.
//
// This file is a demo demonstrate how to convert a PDF file to one or multiple image files.


const FSDK = require("@foxitsoftware/foxit-pdf-sdk-node");
const fs = require('fs');
const os = require('os');
const path = require('path');
const util = require('util');


var sn = "bPxThFlBAYifO3yiW0C51bKbjPap1zHaf5aG5sX378TjFvB7Q0802A==";
var key = "8f3g1sGNtR8NAgfSNv+BvaJWy2fnrw36NZvzh8GUxYXvs+/YczAk4e34yqlOnmL4asgxGMO7+rlOcSHUSSKagx5g4G7VEXfkYLXnDDx77FOOedZPrFFcOCu1vT4+wOKzy1zkORq9cKtiFf44byH5sfRqf+OvELjep2teT9eF9yPCsSw2vRKljXlPy40DMP9XX1O5OTe+mSG3RvwKUMb0+RpG3YobM87j+/ynTDlJMMXw4vgwuTb1ZuAtlvkTdFz7HDLV81C6TYnn73ddHeGD3qYWBVsD4uJkDwyyH/SWr7QX0HSgVg8HSZqnab1VGdAUYxKY2vGWeOTJdu6qDGb5ZEb9O3kZZg+9LYAmUKzDfCYwfIsYZ8Y9LPC4wMx70kIq7JpNnzPvigrdshV8/ew1F0+qP/P5Z1EB53vDVrp2LVSuL873Wv4g3PzjZlNH+1qgT87hC+Buto4qsSUfP5Y2z0uApu+c/TfttCXbeMLSsw9TY1HQD3mkrZExMaQqRrAuXAcZWdvBnVuG3DCZmm8q0DLxJiCfYfViAU/AkbeKMIGaTJdrvIXBcssfde4nmU6qr0M4x4+Hs2ESddtY2QRtLAUBq/7h7GJlJHkEZr8ueaUy/6D/2vvAWz6wMLgmjlPbDTLqzfnCJylHCPtcJmu1SPPT9v1VreBX3+zNWcIT8HueyHEiUniqzwWkRKaotrnNb/zhnHLPpgaBSwKjyi8rOzzVwu/nY84G9ye4jsVjmkIRItKDrW7z22iS+QQuTwfqLVuMB0OD4jMkPCC2slzPfEeZnuh4+Rewln2qLRJVgI72zJ20OBWAelGSpO1Ii2Y3gOvojdmtUwx6R3Z1qFNWTTB25o9ytcux8BLOtTCkA8T8xaT4N339OTCsu/TmfahIDixKvr8cDa6F2WkBT8SOfv64W9PgiNv5B/BMOD2VWYaAl0N7yD0NkYYg/cDWRC4dfpdeip1jrr0k3mND0oSpIkxC+FicZbaYYwRdtJ9OSVWJ5OE0voLv8HgLze8mw6s4TrN3z+a2NQCveMa2VRN7YcEF7agPrvb/qU+otMwHae/wM7+f+HFAaOW+WTfzfxIVFB8/A1DN0NiEX+em4G7nO5F5ZcvfYPpaaioe8Nn33BbVLtMjXqsOBeM8AXiVfpD6YO75j7BqnBUPnivvD8BxJaaIQZvVSuQmvGm0ynt03IYwE8Rq+jYsunvsZ86jh5BiUR+Nm7sK0Qe9BdZn/7jdqohMv9czfMGUAscX+xBMunFbDpcRbWVpUADcm209L8Ndek2XY7YlCMxPgPVNvfWRF2jxehib9Tpd7zB5ZIDfAEH9zrpLfp29DLvCh2Yx8mH7xxdKG1O9Q0GdHphYHhej6smAcPm68R0GUQaTOLfXqNpueGJC1GAOI3Y4swjyt7jMTWcibnKLzwukWE5rnEDhn5n64JnyUM0ZFkRmtOiV";

const input_path = "../input_files/";
const output_path = "../output_files/";

function Save2Image(bitmap, page_index, sExt, from_memory) {
  // Add the bitmap to image and save the image.
  let image = new FSDK.Image();
  image.AddFrame(bitmap);
  let s;
  if (from_memory) {
    s = `AboutFoxit_from_memory_${page_index}`;
  } else {
    s = `AboutFoxit_${page_index}`;
  }
  s = output_directory + s + sExt;
  image.SaveAs(s);
  console.log("Save page %d  into a picture of %s format %s.", page_index, sExt, from_memory ? " from memory" : "")
}

function PDF2Image(doc, from_memory) {
  let support_image_extends = [".bmp", ".jpg", ".jpeg", ".png", ".jpx", ".jp2"];

  // Get page count
  let page_count = doc.GetPageCount();
  for(let i=0; i<page_count; i++) {
    let page = doc.GetPage(i);
    // Parse page.
    page.StartParse(FSDK.PDFPage.e_ParsePageNormal, null, false);

    let width = page.GetWidth();
    let height = page.GetHeight();
    let matrix = page.GetDisplayMatrix(0, 0, width, height, page.GetRotation());

    // Prepare a bitmap for rendering.
    let bitmap = new FSDK.Bitmap(width, height, FSDK.Bitmap.e_DIBArgb, null, 0);
    bitmap.FillRect(0xFFFFFFFF, null);

    // Render page
    let render = new FSDK.Renderer(bitmap, false);
    render.StartRender(page, matrix, null);
    for(let j=0;j<support_image_extends.length;j++) {
      let extend = support_image_extends[j];
      Save2Image(bitmap,i,extend,from_memory);
    }
  }
}

function SaveTiffImage(doc, from_memory)
{
  let support_multi_image = [ ".tif", ".tiff" ];
  for (let i = 0; i < support_multi_image.length; i++) {
    let s = output_directory + "AboutFoxit";
    if (from_memory) s += "_from_memory";
    s += support_multi_image[i];
    let image = new FSDK.Image();
    let nPageCount = doc.GetPageCount();
    for (let page_index = 0; page_index < nPageCount; page_index++) {
      let page = doc.GetPage(page_index);
      // Parse page.
      page.StartParse(FSDK.PDFPage.e_ParsePageNormal, null, false);

      let width = page.GetWidth();
      let height = page.GetHeight();
      let matrix = page.GetDisplayMatrix(0, 0, width, height, page.GetRotation());

      // Prepare a bitmap for rendering.
      let bitmap = new FSDK.Bitmap(width, height, FSDK.Bitmap.e_DIBArgb, null, 0);
      bitmap.FillRect(0xFFFFFFFF, null);

      // Render page
      let render = new FSDK.Renderer(bitmap, false);
      render.StartRender(page, matrix, null);
      image.AddFrame(bitmap);
    }
    image.SaveAs(s);

    console.log("Save pdf file into a picture of %s format %s.", support_multi_image[i], from_memory ? " from memory" : "");
  }
}


let error_code = FSDK.Library.Initialize(sn, key);
if (FSDK.e_ErrSuccess != error_code) {
  if (FSDK.e_ErrInvalidLicense == error_code)
    console.log("[Failed] Current used Foxit PDF SDK key information is invalid.");
  else
    console.log("Library Initialize Error: %d", FSDK.e_ErrSuccess);
  return;
}

let output_directory = output_path + "pdf2image/";
if (!fs.existsSync(output_directory))  {
  fs.mkdirSync(output_directory);
}


let input_file = input_path + "AboutFoxit.pdf";

try {
  {
     let doc = new FSDK.PDFDoc(input_file);
     let error_code = doc.Load("");
     if (error_code != FSDK.e_ErrSuccess) {
       console.log("The Doc [%s] Error: %d\n", input_file, error_code);
       return;
     }
     PDF2Image(doc, false);
     SaveTiffImage(doc, false);

  }

  {
    console.log("Load document from memory.");
    const data = fs.readFileSync(input_file);
    const file_size = data.length;
    const buffer = Buffer.alloc(file_size);
    data.copy(buffer);
    let doc_memory = new FSDK.PDFDoc(buffer, file_size);
     error_code = doc_memory.Load("");
     if (error_code != FSDK.e_ErrSuccess) {
       console.log("The Doc [%s] Error from memory: %d", input_file, error_code);
       return;
     }
     PDF2Image(doc_memory, true);
     SaveTiffImage(doc_memory, true);
  }
} catch (e) {
  console.log(e);
}
FSDK.Library.Release();
