How to manage your PDF Pages using Foxit PDF SDK (C++)

In PDF development, a PDF page means much more than in the final user’s PDF editor or viewer. Page objects help group and identify multiple objects in the PDF to perform other operations. A PDFPage object is retrieved from a PDF document by function PDFDoc.getPage. Page level APIs provide functions to parse, render, edit (includes creating, deleting and flattening) a page, retrieve PDF annotations, read and set the properties of a page, and more. For most cases, a PDF page needs to be parsed before it is rendered or processed.

In this article, we will provide sample code examples for handling your pages using Foxit PDF SDK:

Example:

How to get page size

#include "include/pdf/fs_pdfpage.h"using namespace foxit;using namespace common;using namespace pdf;...// Assuming PDFPage page has been loaded and parsed.int width = static_cast(page.GetWidth());int height = static_cast(page.GetHeight());

How to calculate bounding box of page contents

#include "include/pdf/fs_pdfpage.h"using namespace foxit;using namespace common;using namespace pdf;...//Assuming PDFDoc doc has been loaded.//Assuming PDFPage page has been loaded and parsed.RectF ret = page.CalcContentBBox(PDFPage::e_CalcContentsBox);...

How to create a PDF page and set the size

#include "include/pdf/fs_pdfdoc.h"#include "include/pdf/fs_pdfpage.h"using namespace foxit;using namespace common;using namespace pdf;...// Assuming PDFDoc doc has been loaded.PDFPage page = doc.InsertPage(index, PageWidth, PageHeight);

How to delete a PDF page

#include "include/pdf/fs_pdfdoc.h"#include "include/pdf/fs_pdfpage.h"using namespace foxit;using namespace common;using namespace pdf;...// Assuming PDFDoc doc has been loaded.// Remove a PDF page by page index.doc.RemovePage(index);// Remove a specified PDF page.doc.RemovePage(&page);...

How to flatten a PDF page

#include "include/pdf/fs_pdfpage.h"using namespace foxit;using namespace common;using namespace pdf;...// Assuming PDFPage page has been loaded and parsed.// Flatten all contents of a PDF page.page.Flatten(true, PDFPage::e_FlattenAll);// Flatten a PDF page without annotations.page.Flatten(true, PDFPage::e_FlattenNoAnnot);// Flatten a PDF page without form controls.page.Flatten(true, PDFPage::e_FlattenNoFormControl);// Flatten a PDF page without annotations and form controls (Equals to nothing to be flattened).page.Flatten(true, PDFPage::e_FlattenNoAnnot | PDFPage::e_FlattenNoFormControl);...

How to get and set page thumbnails in a PDF document

#include "include/pdf/fs_pdfpage.h"using namespace foxit;using namespace common;using namespace pdf;...// Assuming PDFPage page has been loaded and parsed.Bitmap bmp();// Write bitmap data to the bmp object....// Set thumbnails to the page.page.SetThumbnail(bmp);// Load thumbnails in the page.Bitmap bitmap = page.LoadThumbnail();...