Using Trigonometry And Pythagoras To Watermark An Image

ABSTRACTThe class presented here will place a watermark on an image. It takes a Bitmap object and returns another Bitmap with a string drawn diagonally (top-left to bottom-right) across it. An instance of the class is constructed with the actual text to place, font properties, maximum wanted font size (more on this in a bit), Color and transparency (byte). This may sound fairly trivial but calculating the angle of the diagonal line through a Rectangle of unknown Size at design time (big d'oh! if there's a library method that already does this!) and autosizing the font to fill as much of the bi…