CODEWITHSUNDEEP
pdfium
Mohan Selvaraj
Mohan Selvaraj

Reputation: 276

How to render the PDF page as EMF or meta file in PDFium

Currently I have generated the PDF page as bitmap by using FPDF_RenderPageBitmap method.

is there any method for rendering the PDF page as EMF or as metafile in PDFium?

Upvotes: 0

Views: 1434

Answers (2)

Studlyer
Studlyer

Reputation: 29

In the pdfium project there is a sample folder that has a pdfium_test.cc file that has examples of output in different formats. PNG, EMF, BMP, TXT, and PPM are all in the at the present time.

The current code to render an EMF

void WriteEmf(FPDF_PAGE page, const char* pdf_name, int num) {
  int width = static_cast<int>(FPDF_GetPageWidth(page));
  int height = static_cast<int>(FPDF_GetPageHeight(page));

  char filename[256];
  snprintf(filename, sizeof(filename), "%s.%d.emf", pdf_name, num);

  HDC dc = CreateEnhMetaFileA(nullptr, filename, nullptr, nullptr);

  HRGN rgn = CreateRectRgn(0, 0, width, height);
  SelectClipRgn(dc, rgn);
  DeleteObject(rgn);

  SelectObject(dc, GetStockObject(NULL_PEN));
  SelectObject(dc, GetStockObject(WHITE_BRUSH));
  // If a PS_NULL pen is used, the dimensions of the rectangle are 1 pixel less.
  Rectangle(dc, 0, 0, width + 1, height + 1);

  FPDF_RenderPage(dc, page, 0, 0, width, height, 0,
                  FPDF_ANNOT | FPDF_PRINTING | FPDF_NO_CATCH);

  DeleteEnhMetaFile(CloseEnhMetaFile(dc));
}

Upvotes: 2

dj2
dj2

Reputation: 9598

On Windows, you want to call FPDF_RenderPage and pass in the HDC this should allow you to get the EMF data out. You can see the chromium printing code for example usage. There is also FPDF_SetPrintMode which lets you set different modes.

Upvotes: 1

Related Questions