public static BitmapSource Render(this PdfDocumentWrapper doc, int page, double factor, bool fixDpi = true)
{
var scale = DisplayDeviceHelper.GetCurrentScaleFactor();
var dpiX = fixDpi ? scale.Horizontal * DisplayDeviceHelper.DefaultDpi : 96;
var dpiY = fixDpi ? scale.Vertical * DisplayDeviceHelper.DefaultDpi : 96;
Bitmap bitmap;
lock (LockObj)
{
var size = doc.PdfDocument.PageSizes[page];
var realWidth = (int)Math.Round(size.Width * scale.Horizontal * factor);
var realHeight = (int)Math.Round(size.Height * scale.Vertical * factor);
bitmap = doc.PdfDocument.Render(page, realWidth, realHeight, dpiX, dpiY, PdfRotation.Rotate0,
PdfRenderFlags.LimitImageCacheSize | PdfRenderFlags.LcdText | PdfRenderFlags.Annotations |
PdfRenderFlags.ForPrinting, true) as Bitmap;
}
var bs = bitmap?.ToBitmapSource();
bitmap?.Dispose();
bs?.Freeze();
return(bs);
}
public void Refresh()
{
var oldD = PdfDocument;
PdfStream.Position = 0;
var newObj = new PdfDocumentWrapper(PdfStream);
PdfDocument = newObj.PdfDocument;
PdfStream = newObj.PdfStream;
oldD.Dispose();
}
public static BitmapSource RenderThumbnail(this PdfDocumentWrapper doc, int page)
{
lock (LockObj)
{
if (_renderCount++ == 50)
{
doc.Refresh();
_renderCount = 0;
}
}
var size = doc.PdfDocument.PageSizes[page];
var factorX = 60d / size.Width;
var factorY = 120d / size.Height;
return(doc.Render(page, Math.Min(factorX, factorY), false));
}
