I am generating tiles from very large images to use with leaflet. I have a working solution that uses System.Drawing.Bitmap and loads the image from file. I already have the image in memory as a BitmapImage however, and would like to reuse it for memory purposes since these images can be very large. But I can not find a good way of doing this with BitmapImage.
What I basically need is something equivalent of
GraphicsHandle.DrawImage(sourceImage, destinationRect, sourceRect, GraphicsUnit.Pixel);
I need to crop and resize a part of the image, and draw this onto another image in a specified location and then save this to file. What is the best way of doing this using BitmapImage?