// 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 contains an example to demonstrate how to use Foxit PDF SDK to render FLD pages.

// Include Foxit SDK header files.
#include <iostream>
#if defined(_WIN32) || defined(_WIN64)
#include <direct.h>
#else
#include <sys/stat.h>
#endif

#include "common/fs_common.h"
#include "common/fs_image.h"
#include "common/fs_render.h"
#include "fld/fs_flddoc.h"
#include "fld/fs_fldpage.h"

using namespace std;
using namespace foxit;
using namespace foxit::common;
using foxit::common::Library;
using namespace foxit::fld;

static const char* sn = "fpj42y0uOGt8cNp2iJUJdW5LNQGpJDawgJ5niOHYLl+0Emd0mMDhtA==";
static const char* key = "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";

#if defined(_WIN32) || defined(_WIN64)
static WString output_path = WString::FromLocal("../output_files/");
static WString input_path = WString::FromLocal("../input_files/");
#else
static WString output_path = WString::FromLocal("./output_files/");
static WString input_path = WString::FromLocal("./input_files/");
#endif

class SdkLibMgr {
public:
  SdkLibMgr() : is_initialize_(false) {};
  ErrorCode Initialize() {
    ErrorCode error_code = Library::Initialize(sn, key);
    if (error_code != foxit::e_ErrSuccess) {
      printf("Library Initialize Error: %d\n", error_code);
    } else {
      is_initialize_ = true;
    }
    return error_code;
  }
  ~SdkLibMgr() {
    if (is_initialize_)
      Library::Release();
  }
private:
  bool is_initialize_;
};

int main(int argc, char* argv[])
{
  WString output_directory = output_path + L"fld_render/";
#if defined(_WIN32) || defined(_WIN64)
  _mkdir(String::FromUnicode(output_directory));
#else
  mkdir(String::FromUnicode(output_directory), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
#endif

  int err_ret = 0;
  SdkLibMgr sdk_lib_mgr;
  // Initialize library
  ErrorCode error_code = sdk_lib_mgr.Initialize();
  if (error_code != foxit::e_ErrSuccess) {
    return 1;
  }

  // Render FLD page to bitmap with default options
  try {
    cout << "Start: Render FLD page to bitmap (default options)." << endl;
    {
      WString input_file = input_path + L"sample.ofd";

      FLDDoc doc(String::FromUnicode(input_file));
      if (doc.IsEmpty()) {
        cout << "Failed to create FLD document." << endl;
        return 1;
      }

      error_code = doc.Load("");
      if (error_code != foxit::e_ErrSuccess) {
        cout << "Failed to load FLD document. Error: " << error_code << endl;
        return 1;
      }

      int page_count = doc.GetPageCount();
      cout << "Page count: " << page_count << endl;
      cout << "Document type: " << (FX_LPCSTR)String(doc.GetDocType()) << endl;

      if (page_count > 0) {
        FLDPage page = doc.GetPage(0);
        if (page.IsEmpty()) {
          cout << "Failed to get page 0." << endl;
          err_ret = 1;
        } else {
          error_code = page.Parse();
          if (error_code != foxit::e_ErrSuccess) {
            cout << "Failed to parse page 0. Error: " << error_code << endl;
            err_ret = 1;
          } else {
            float page_width = page.GetWidth();
            float page_height = page.GetHeight();

            int render_width = (int)(page_width * 96 / 72);
            int render_height = (int)(page_height * 96 / 72);

            Bitmap bitmap(render_width, render_height, Bitmap::e_DIBArgb);
            bitmap.FillRect(0xFFFFFFFF, NULL);

            Matrix matrix = page.GetDisplayMatrix(0, 0, render_width, render_height, e_Rotation0);

            FLDRender render(bitmap);
            bool result = render.Render(page, matrix);

            if (result) {
              Image image;
              image.AddFrame(bitmap);
              WString output_file = output_directory + L"render_default.png";
              image.SaveAs(output_file);
              cout << "Render page 0 to render_default.png successfully." << endl;
            } else {
              cout << "Failed to render page 0." << endl;
              err_ret = 1;
            }
          }
        }
      }
    }
    cout << "End: Render FLD page (default options)." << endl;
  } catch (const Exception& e) {
    cout << e.GetMessage() << endl;
    err_ret = 1;
  }

  // Render FLD page with custom render option (mapping gray color mode)
  try {
    cout << "Start: Render FLD page with mapping gray color mode." << endl;
    {
      WString input_file = input_path + L"sample.ofd";

      FLDDoc doc(String::FromUnicode(input_file));
      error_code = doc.Load("");
      if (error_code != foxit::e_ErrSuccess) {
        cout << "Failed to load FLD document." << endl;
        err_ret = 1;
      } else if (doc.GetPageCount() > 0) {
        FLDPage page = doc.GetPage(0);
        if (!page.IsEmpty()) {
          page.Parse();

          float page_width = page.GetWidth();
          float page_height = page.GetHeight();

          int render_width = (int)(page_width * 96 / 72);
          int render_height = (int)(page_height * 96 / 72);

          Bitmap bitmap(render_width, render_height, Bitmap::e_DIBArgb);
          bitmap.FillRect(0xFFFFFFFF, NULL);

          Matrix matrix = page.GetDisplayMatrix(0, 0, render_width, render_height, e_Rotation0);

          FLDRenderOption render_option;
          render_option.color_mode = FLDRenderOption::e_ColorModeMappingGray;
          render_option.back_color = 0xFF000000;  // Black background
          render_option.fore_color = 0xFFFFFFFF;  // White foreground

          FLDRender render(bitmap);
          render.SetRenderOption(render_option);

          bool result = render.Render(page, matrix);
          if (result) {
            Image image;
            image.AddFrame(bitmap);
            WString output_file = output_directory + L"render_mapping_gray.png";
            image.SaveAs(output_file);
            cout << "Render page 0 with mapping gray mode to render_mapping_gray.png successfully." << endl;
          } else {
            cout << "Failed to render page 0 with mapping gray mode." << endl;
            err_ret = 1;
          }
        }
      }
    }
    cout << "End: Render FLD page (mapping gray)." << endl;
  } catch (const Exception& e) {
    cout << e.GetMessage() << endl;
    err_ret = 1;
  }

  // Render FLD page with custom text color
  try {
    cout << "Start: Render FLD page with custom text color." << endl;
    {
      WString input_file = input_path + L"sample.ofd";

      FLDDoc doc(String::FromUnicode(input_file));
      error_code = doc.Load("");
      if (error_code != foxit::e_ErrSuccess) {
        cout << "Failed to load FLD document." << endl;
        err_ret = 1;
      } else if (doc.GetPageCount() > 0) {
        FLDPage page = doc.GetPage(0);
        if (!page.IsEmpty()) {
          page.Parse();

          float page_width = page.GetWidth();
          float page_height = page.GetHeight();

          int render_width = (int)(page_width * 96 / 72);
          int render_height = (int)(page_height * 96 / 72);

          Bitmap bitmap(render_width, render_height, Bitmap::e_DIBArgb);
          bitmap.FillRect(0xFFFFFFFF, NULL);

          Matrix matrix = page.GetDisplayMatrix(0, 0, render_width, render_height, e_Rotation0);

          FLDRenderOption render_option;

          FLDRender render(bitmap);
          render.SetRenderOption(render_option);

          bool result = render.Render(page, matrix);
          if (result) {
            Image image;
            image.AddFrame(bitmap);
            WString output_file = output_directory + L"render_text_color.png";
            image.SaveAs(output_file);
            cout << "Render page 0 with custom text color to render_text_color.png successfully." << endl;
          } else {
            cout << "Failed to render page 0 with custom text color." << endl;
            err_ret = 1;
          }
        }
      }
    }
    cout << "End: Render FLD page (custom text color)." << endl;
  } catch (const Exception& e) {
    cout << e.GetMessage() << endl;
    err_ret = 1;
  }

  // Render FLD page with high DPI
  try {
    cout << "Start: Render FLD page with high DPI (300 dpi)." << endl;
    {
      WString input_file = input_path + L"sample.ofd";

      FLDDoc doc(String::FromUnicode(input_file));
      error_code = doc.Load("");
      if (error_code != foxit::e_ErrSuccess) {
        cout << "Failed to load FLD document." << endl;
        err_ret = 1;
      } else if (doc.GetPageCount() > 0) {
        FLDPage page = doc.GetPage(0);
        if (!page.IsEmpty()) {
          page.Parse();

          float page_width = page.GetWidth();
          float page_height = page.GetHeight();

          int dpi = 300;
          int render_width = (int)(page_width);
          int render_height = (int)(page_height);

          Bitmap bitmap(render_width, render_height, Bitmap::e_DIBArgb);
          bitmap.FillRect(0xFFFFFFFF, NULL);

          Matrix matrix = page.GetDisplayMatrix(0, 0, render_width, render_height, e_Rotation0);

          FLDRenderOption render_option;
          render_option.x_dpi = dpi;
          render_option.y_dpi = dpi;

          FLDRender render(bitmap);
          render.SetRenderOption(render_option);

          bool result = render.Render(page, matrix);
          if (result) {
            Image image;
            image.AddFrame(bitmap);
            WString output_file = output_directory + L"render_300dpi.png";
            image.SaveAs(output_file);
            cout << "Render page 0 at 300 DPI to render_300dpi.png successfully." << endl;
          } else {
            cout << "Failed to render page 0 at 300 DPI." << endl;
            err_ret = 1;
          }
        }
      }
    }
    cout << "End: Render FLD page with high DPI." << endl;
  } catch (const Exception& e) {
    cout << e.GetMessage() << endl;
    err_ret = 1;
  }

  // Render all FLD pages
  try {
    cout << "Start: Render all FLD pages." << endl;
    {
      WString input_file = input_path + L"sample.ofd";

      FLDDoc doc(String::FromUnicode(input_file));
      error_code = doc.Load("");
      if (error_code != foxit::e_ErrSuccess) {
        cout << "Failed to load FLD document." << endl;
        err_ret = 1;
      } else {
        int page_count = doc.GetPageCount();
        for (int i = 0; i < page_count; i++) {
          FLDPage page = doc.GetPage(i);
          if (page.IsEmpty()) {
            cout << "Failed to get page " << i << "." << endl;
            continue;
          }

          error_code = page.Parse();
          if (error_code != foxit::e_ErrSuccess) {
            cout << "Failed to parse page " << i << ". Error: " << error_code << endl;
            continue;
          }

          float page_width = page.GetWidth();
          float page_height = page.GetHeight();

          int render_width = (int)(page_width * 96 / 72);
          int render_height = (int)(page_height * 96 / 72);

          Bitmap bitmap(render_width, render_height, Bitmap::e_DIBArgb);
          bitmap.FillRect(0xFFFFFFFF, NULL);

          Matrix matrix = page.GetDisplayMatrix(0, 0, render_width, render_height, e_Rotation0);

          FLDRender render(bitmap);
          bool result = render.Render(page, matrix);
          if (result) {
            Image image;
            image.AddFrame(bitmap);
            WString file_name;
            file_name.Format(L"render_page_%d.png", i);
            WString output_file = output_directory + file_name;
            image.SaveAs(output_file);
            cout << "Render page " << i << " successfully." << endl;
          } else {
            cout << "Failed to render page " << i << "." << endl;
          }
        }
      }
    }
    cout << "End: Render all FLD pages." << endl;
  } catch (const Exception& e) {
    cout << e.GetMessage() << endl;
    err_ret = 1;
  }

  return err_ret;
}
