// source and targetrects may be empty! (due to crops with pages etc.)
public void Draw(WriteableBitmap bitmap, int rotation, IList <KeyValuePair <int, PdfSourceRect> > pageRectsDict,
PdfViewerController.Viewport viewport)
{
Logger.LogInfo("Drawing bitmap");
if (!isOpen)
{
throw new PdfNoFileOpenedException();
}
IList <PdfSourceRect> sourceRects = new List <PdfSourceRect>();
IList <PdfTargetRect> targetRects = new List <PdfTargetRect>();
IList <int> visiblePages = new List <int>();
IList <int> pages = new List <int>(); //The list of pagenumbers for each s/t rect that needs to be drawn
IList <int> newPages = new List <int>(); //pages that are completely new drawn and nothing is reused
IList <PdfSourceRect> pageRects = new List <PdfSourceRect>();
IList <PdfSourceRect> visibleRectOnPages = new List <PdfSourceRect>();
reusedTargetRects = new List <PdfTargetRect>();
foreach (KeyValuePair <int, PdfSourceRect> keyValuePair in pageRectsDict)
{
PdfSourceRect pageRect = keyValuePair.Value;
int page = keyValuePair.Key;
if (!visiblePages.Contains(page))
{
visiblePages.Add(page);
}
// crop the page with viewport //Note that the size of the resulting rectangle may vary depending on viewport/pageRect offsets, due to rounding issues
//PdfSourceRect visibleRectOnPage = pageRect.intersectDouble(viewport.Rectangle.GetSourceRect(viewport.ZoomFactor));
PdfTargetRect visibleTargetRect = pageRect.GetTargetRect(viewport.ZoomFactor)
.intersectInt(viewport.Rectangle);
PdfSourceRect visibleRectOnPage = visibleTargetRect.GetSourceRect(viewport.ZoomFactor);
visibleRectOnPage.Offset(-pageRect.dX, -pageRect.dY);
bool insertedRectanglesToDraw = false;
if (lastBitmap != null && lastRotation == rotation &&
Math.Abs(lastViewport.ZoomFactor / viewport.ZoomFactor - 1.0) < 0.01)
{
insertedRectanglesToDraw = CalculateSourceTargetRects(bitmap, rotation, page, pageRect, pages,
sourceRects, targetRects, visibleRectOnPage, viewport);
}
if (!insertedRectanglesToDraw)
{
//i just have to do the same thing in here as calculateSourceTargetRects would do
PdfTargetRect targetRect = GetTargetRect(visibleRectOnPage, pageRect, viewport);
sourceRects.Add(GetSourceFromTargetRect(targetRect, pageRect, viewport));
targetRects.Add(targetRect);
pages.Add(page);
newPages.Add(page);
}
pageRects.Add(pageRect);
visibleRectOnPages.Add(visibleRectOnPage);
}
int drewThisManyTimes = 0;
//DebugLogger.Log("Started drawing of pages " + string.Join(",", pages.Select(i => i.ToString()).ToArray()));
for (int i = 0; i < pages.Count; i++)
{
int p = pages[i];
PdfSourceRect s = sourceRects[i];
PdfTargetRect t = targetRects[i];
//The target may be so small, that we cant see it or it can be horizontally shifted out of the viewport
if (t.IsEmpty)
{
continue;
}
//draw the content of the sourcerectangle in the pdf to the targetRectangle on the viewer bitmap
bitmap.Lock();
Logger.LogInfo("Drawing page " + p + " targetRect=" + t.ToString());
PdfViewerDraw(documentHandle, p, bitmap.PixelWidth, bitmap.PixelHeight, bitmap.BackBuffer, rotation,
t.iX, t.iY, t.iWidth, t.iHeight,
s.dX, s.dY, s.dWidth, s.dHeight, TPdfViewerModelPixelOrder.ePdfViewerModelPixelOrderBGRA);
drewThisManyTimes++;
Logger.LogInfo("Finished drawing page " + p);
bitmap.AddDirtyRect(t.GetInt32Rect());
bitmap.Unlock();
}
lastBitmap = bitmap;
lastVisiblePages = visiblePages;
lastPageRects = pageRects;
lastRotation = rotation;
lastViewport = viewport;
lastVisibleRectOnPages = visibleRectOnPages;
//DebugLogger.Log("Finished drawing of pages " + string.Join(",", pages.Select(i => i.ToString()).ToArray()));
//visualizeDraw(bitmap.Clone(), rotation, pages, sourceRects, targetRects, newPages);
Logger.LogInfo("Drew bitmap using " + drewThisManyTimes + " native calls");
}
