private void DisplayThumbnail() { ImageThumbnail.Source = null; TxtAbstract.Text = ""; if (null == pdf_document) { return; } try { if (pdf_document.DocumentExists) { const double IMAGE_PERCENTAGE = 0.5; using (MemoryStream ms = new MemoryStream(pdf_document.PDFRenderer.GetPageByHeightAsImage(page, ImageThumbnail.Height / IMAGE_PERCENTAGE))) { Bitmap image = (Bitmap)Image.FromStream(ms); PDFOverlayRenderer.RenderAnnotations(image, pdf_document, page, specific_pdf_annotation); PDFOverlayRenderer.RenderHighlights(image, pdf_document, page); PDFOverlayRenderer.RenderInks(image, pdf_document, page); image = image.Clone(new RectangleF { Width = image.Width, Height = (int)Math.Round(image.Height * IMAGE_PERCENTAGE) }, image.PixelFormat); BitmapSource image_page = BitmapImageTools.CreateBitmapSourceFromImage(image); ImageThumbnail.Source = image_page; } } else { string abstract_text = pdf_document.Abstract; if (PDFAbstractExtraction.CANT_LOCATE != abstract_text) { TxtAbstract.Text = abstract_text; } } } catch (Exception ex) { Logging.Error(ex, "There was a problem showing the PDF thumbnail"); } if (null != ImageThumbnail.Source) { ImageThumbnail.Visibility = Visibility.Visible; } else { ImageThumbnail.Visibility = Visibility.Collapsed; } }
public override DocumentPage GetPage(int page_zero_based) { // Hackity hack WPFDoEvents.DoEvents(); if (null != last_document_page) { last_document_page.Dispose(); last_document_page = null; } int page = page_from + page_zero_based; StatusManager.Instance.UpdateStatus("PDFPrinter", String.Format("Printing page {0} of {1}", page_zero_based + 1, this.PageCount), page_zero_based + 1, this.PageCount, true); // Render a page at 300 DPI... using (Image image = Image.FromStream(new MemoryStream(pdf_renderer.GetPageByDPIAsImage(page, 300)))) { PDFOverlayRenderer.RenderAnnotations(image, pdf_document, page, null); PDFOverlayRenderer.RenderHighlights(image, pdf_document, page); PDFOverlayRenderer.RenderInks(image, pdf_document, page); BitmapSource image_page = BitmapImageTools.CreateBitmapSourceFromImage(image); image_page.Freeze(); DrawingVisual dv = new DrawingVisual(); using (DrawingContext dc = dv.RenderOpen()) { // Rotate the image if its orientation does not match the printer if ( page_size.Width < page_size.Height && image_page.Width > image_page.Height || page_size.Width > page_size.Height && image_page.Width < image_page.Height ) { image_page = new TransformedBitmap(image_page, new RotateTransform(90)); image_page.Freeze(); } dc.DrawImage(image_page, new Rect(0, 0, page_size.Width, page_size.Height)); } ++total_pages_printed; last_document_page = new DocumentPage(dv); return(last_document_page); } }