Saves the canvas state.
public int Save ();
The value to pass to RestoreToCount(Int32) to balance this save.
This call saves the current matrix, clip, and draw filter, and pushes a copy onto a private stack. Subsequent calls to translate, scale, rotate, skew, concatenate or clipping path or drawing filter all operate on this copy. When the balancing call to Restore() is made, the previous matrix, clipping, and drawing filters are restored.