Here are a few suggestions:
1.) The ability to stretch or scale images by a scale factor or size value(in pixels) in the x and y axes.
2.) Add (good) support for display of meters(bars, etc.), using sprites.
3.) Add drawing functions for lines, rectangles, ellipses, pie slices, etc.
4.) Add drawing function for filling those rectangles, ellipses, etc. with a color, may be different than line color.
