|
public DisplayRegionEditInProgress ( Microsoft.Graphics.Canvas.CanvasDrawingSession drawingSession, List |
||
| drawingSession | Microsoft.Graphics.Canvas.CanvasDrawingSession | |
| points | List |
|
| zoomFactor | float | |
| return | void | |
void Canvas_Draw(CanvasControl sender, CanvasDrawEventArgs args)
{
if (photo.SourceBitmap == null)
{
return;
}
var drawingSession = args.DrawingSession;
drawingSession.Units = CanvasUnits.Pixels;
drawingSession.Blend = CanvasBlend.Copy;
// Draw the main photo image.
ICanvasImage image;
if (editingRegion != null)
{
image = cachedImage.Get() ?? cachedImage.Cache(photo, photo.GetImage());
}
else
{
image = photo.GetImage();
}
drawingSession.DrawImage(image);
// Highlight the current region (if any).
lastDrawnZoomFactor = null;
foreach (var edit in photo.Edits)
{
if (edit.DisplayRegionMask(drawingSession, scrollView.ZoomFactor, editingRegion != null))
{
lastDrawnZoomFactor = scrollView.ZoomFactor;
}
}
// Display any in-progress region edits.
if (editingRegion != null)
{
editingRegion.DisplayRegionEditInProgress(drawingSession, regionPoints, scrollView.ZoomFactor);
}
}
