//Render the pdf page, then save it to a bitmap file. void FunctionDemo::MainPage::render_Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e) { StorageFolder^ documentFolder = Windows::Storage::KnownFolders::DocumentsLibrary; std::shared_ptr spBitmap = std::make_shared(nullptr); create_task(documentFolder->GetFileAsync("FoxitBigPreview.pdf")).then([=](StorageFile^ file) { try { m_doc = ref new FSPDFDoc(file, 0); if (!m_doc) { return; } FSErrorCode code = m_doc->Load(""); if (code != FSErrorCode::e_errSuccess) { return; } FSPDFPage^ page = m_doc->GetPage(0); if (!page->IsParsed()) { page->StartParse(0, nullptr, false); } //create bitmap int pageWidth = (int)page->GetWidth(); int pageHeight = (int)page->GetHeight(); *spBitmap = ref new FSBitmap(pageWidth, pageHeight, FSDIBFormat::e_dibRgb32, nullptr, 0); if (!(*spBitmap)) { return; } (*spBitmap)->FillRect(0xffffffff, nullptr); //init renderer FSRenderer^ render = ref new FSRenderer((*spBitmap), false); if (!render) { return; } //set different kinds of properties render->SetRenderContentFlags((int)FSRenderContentFlag::e_renderPage); render->SetTransformAnnotIcon(true); render->SetColorMode(FSRenderColorMode::e_colorModeNormal); render->SetForceHalftone(true); FSMatrix^ matrix = page->GetDisplayMatrix(0, 0, pageWidth, pageHeight, FSRotation::e_rotation0); render->StartRender(page, matrix, nullptr); } catch (Platform::Exception^ e) { OutputDebugString(e->Message->Data()); } }).then([=]() { return documentFolder->CreateFileAsync("Output_Render.bmp", CreationCollisionOption::ReplaceExisting); }).then([=](StorageFile^ file) { FSImage^ img = ref new FSImage(); img->AddFrame((*spBitmap)); if(img->SaveAs(file, "bmp")) this->showMesseageDialog("", "The output file is saved to:" + file->Path); else this->showMesseageDialog("", "error!"); });