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#include "public/cpp/fpdf_scopers.h"
#include "public/fpdf_ext.h"
#include "samples/pdfium_test_write_helper.h"
#include "testing/test_support.h"




bool RenderPage(const std::string& name,
                FPDF_DOCUMENT doc,
                const int page_index)
{

  FPDF_PAGE page = FPDF_LoadPage ( doc, page_index );

  if ( ! page )
  {
    printf ( "FPDF_LoadPage failed\n" );
    return false;
  }

  double scale = .5;

  auto width = static_cast<int>(FPDF_GetPageWidth ( page ) * scale);
  auto height = static_cast<int>(FPDF_GetPageHeight ( page ) * scale);
  int alpha = FPDFPage_HasTransparency ( page ) ? 1 : 0;


  ScopedFPDFBitmap bitmap ( FPDFBitmap_Create ( width, height, alpha ));

  if (bitmap)
  {
    FPDF_DWORD fill_color = alpha ? 0x00000000 : 0xFFFFFFFF;
    FPDFBitmap_FillRect(bitmap.get(), 0, 0, width, height, fill_color);

    FPDF_RenderPageBitmap(bitmap.get(), page, 0, 0, width, height, 0, FPDF_ANNOT);


    int stride = FPDFBitmap_GetStride(bitmap.get());
    const char* buffer =
        reinterpret_cast<const char*>(FPDFBitmap_GetBuffer(bitmap.get()));

    std::string image_file_name;
    image_file_name = WritePng(name.c_str(), page_index, buffer, stride, width, height);
  }

  FPDF_ClosePage ( page );
  page = NULL;


  return !!bitmap;
}



















void RenderPdf ( const char *name )
{

#if 0
	size_t file_length = 0;
	std::unique_ptr<char, pdfium::FreeDeleter> file_contents = GetFileContents ( name, &file_length );

	TestLoader loader ( file_contents.get(), file_length );

	FPDF_FILEACCESS file_access = {};
	file_access.m_FileLen = static_cast<unsigned long>( file_length );
	file_access.m_GetBlock = TestLoader::GetBlock;
	file_access.m_Param = &loader;

	FPDF_DOCUMENT doc = FPDF_LoadCustomDocument ( &file_access, nullptr );
#else

	FPDF_DOCUMENT doc = FPDF_LoadDocument ( name, NULL );
#endif


  if ( ! doc )
    return;


  int page_count = FPDF_GetPageCount ( doc );

  int rendered_pages = 0;
  int bad_pages = 0;

  for (int i = 0; i < page_count; ++i)
  {
    if ( RenderPage ( name, doc, i ))
    {
      ++rendered_pages;
    }
    else
    {
      ++bad_pages;
    }
  }

  fprintf(stderr, "Rendered %d pages.\n", rendered_pages);
  if (bad_pages)
    fprintf(stderr, "Skipped %d bad pages.\n", bad_pages);


  FPDF_CloseDocument(doc);

}







int main ( int argc, const char* argv[] )
{
	FPDF_InitLibrary ( );

	char fname[] = "bad_pg_10.pdf";
    fprintf(stderr, "Rendering PDF file %s.\n", fname );

    RenderPdf ( fname );

	FPDF_DestroyLibrary();

	return 0;
}