// 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.

using System;
using System.Collections.Generic;

using foxit;
using foxit.common;
using foxit.common.fxcrt;
using foxit.pdf;
using System.IO;
using System.Runtime.InteropServices;

namespace pdf2imageCS
{
    class pdf2image
    {
        private const string input_path = "../input_files/";
        private const string output_path = "../output_files/pdf2image/";

        public static void Save2Image(foxit.common.Bitmap bitmap, int page_index, string sExt, bool from_memory)
        {
            string save_name = output_path + string.Format("AboutFoxit_{0}{1}{2}", page_index, from_memory ? "_from_memory":"", sExt);
            // Add the bitmap to image and save the image.
            foxit.common.Image image = new foxit.common.Image();
            image.AddFrame(bitmap);
            image.SaveAs(save_name);
            System.GC.Collect();
            Console.WriteLine("Save page {0} into a picture of {1} format{2}.", page_index, sExt, from_memory ? " from memory" : "");
        }

        public static void PDF2Image(PDFDoc doc, bool from_memory)
        {
            string[] support_image_extends = { ".bmp", ".jpg", ".jpeg", ".png", ".jpx", ".jp2" };

            // Get page count
            int nPageCount = doc.GetPageCount();
            for(int i=0;i<nPageCount;i++)
            {
                using (PDFPage page = doc.GetPage(i))
                {
                    // Parse page.
                    page.StartParse((int)foxit.pdf.PDFPage.ParseFlags.e_ParsePageNormal, null, false);

                    int width = (int)(page.GetWidth());
                    int height = (int)(page.GetHeight());
                    Matrix2D matrix = page.GetDisplayMatrix(0, 0, width, height, page.GetRotation());

                  // Prepare a bitmap for rendering.
                  using (foxit.common.Bitmap bitmap = new foxit.common.Bitmap(width, height, foxit.common.Bitmap.DIBFormat.e_DIBArgb, System.IntPtr.Zero, 0))
                  {
                      bitmap.FillRect(0xFFFFFFFF, null);
                      // Render page
                      Renderer render = new Renderer(bitmap, false);
                      render.StartRender(page, matrix, null);
                      for (int j = 0; j < support_image_extends.Length; j++)
                      {
                        string extend = support_image_extends[j];
                        Save2Image(bitmap, i, extend, from_memory);
                      }
                  }
                }
            }
            
        }
        public static void SaveTiffImage(PDFDoc doc, bool from_memory)
        {
            string[] support_multi_image = { ".tif", ".tiff" };
            foreach (string format in support_multi_image)
            {
                string save_name = output_path + "AboutFoxit" + (from_memory ? "from memory" : "") + format;
                foxit.common.Image image = new foxit.common.Image();
                List<foxit.common.Bitmap> list = new List<foxit.common.Bitmap>();

                // Get page count
                int nPageCount = doc.GetPageCount();
                for (int i = 0; i < nPageCount; i++)
                {
                    using (PDFPage page = doc.GetPage(i))
                    {
                        // Parse page.
                        page.StartParse((int)foxit.pdf.PDFPage.ParseFlags.e_ParsePageNormal, null, false);

                        int width = (int)(page.GetWidth());
                        int height = (int)(page.GetHeight());
                        Matrix2D matrix = page.GetDisplayMatrix(0, 0, width, height, page.GetRotation());

                        // Prepare a bitmap for rendering.
                        foxit.common.Bitmap bitmap = new foxit.common.Bitmap(width, height, foxit.common.Bitmap.DIBFormat.e_DIBArgb, System.IntPtr.Zero, 0);

                        list.Add(bitmap);

                        bitmap.FillRect(0xFFFFFFFF, null);

                        // Render page
                        Renderer render = new Renderer(bitmap, false);
                        render.StartRender(page, matrix, null);
                        image.AddFrame(bitmap);                        
                    }
                }
                image.SaveAs(save_name);
                Console.WriteLine("Save pdf file into a picture of {0} format{1}.", format, from_memory ? " from memory" : "");
                for (int j = 0; j < list.Count; j++)
                {
                    foxit.common.Bitmap bitmap = list[j];
                    bitmap.Dispose();
                }
                image.Dispose();
                System.GC.Collect();
            }
        }

        static void Main(string[] args)
        {
            System.IO.Directory.CreateDirectory(output_path);

            string sn = "Rew1vB0TqoMIxX444UcpScARWdhgJpsJfzmyMLR32a0+EgrCjp2NaQ==";
            string key = "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";
            // Initialize library
            ErrorCode error_code = Library.Initialize(sn, key);
            if (error_code != ErrorCode.e_ErrSuccess)
            {
                Console.WriteLine("Library Initialize Error: {0}\n", error_code);
                return;
            }

            try
            {
                string input_file = input_path + "AboutFoxit.pdf";
                using (PDFDoc doc = new PDFDoc(input_file))
                {
                    error_code = doc.Load(null);
                    if (error_code != ErrorCode.e_ErrSuccess)
                    {
                        Console.WriteLine("The PDFDoc [{0}] Error: {1}\n", input_file, error_code);
                        Library.Release();
                        return;
                    }
                    PDF2Image(doc, false);
                    SaveTiffImage(doc, false);
                    System.GC.Collect();
                }

                byte[] buffer = File.ReadAllBytes(input_file);
                IntPtr buffer_intptr = Marshal.AllocHGlobal(buffer.Length);
                Marshal.Copy(buffer, 0, buffer_intptr, buffer.Length);

                using (PDFDoc doc = new PDFDoc(buffer_intptr, (uint)buffer.Length))
                {
                    error_code = doc.Load(null);
                    if (error_code != ErrorCode.e_ErrSuccess)
                    {
                        Console.WriteLine("The PDFDoc [{0}] Error: {1}\n", input_file, error_code);
                        Library.Release();
                        return;
                    }
                    PDF2Image(doc, true);
                    SaveTiffImage(doc, true);
                    System.GC.Collect();
                }
                Marshal.FreeHGlobal(buffer_intptr);
            }
            catch (foxit.PDFException e)
            {
                Console.WriteLine(e.Message);
            }

            Library.Release();
        }
    }
}
