Delegate paint_sweep_gradient_func_t
public delegate void paint_sweep_gradient_func_t(IntPtr funcs, IntPtr paintData, IntPtr colorLine, float x0, float y0, float startAngle, float endAngle, IntPtr userData)
public delegate void paint_sweep_gradient_func_t(IntPtr funcs, IntPtr paintData, IntPtr colorLine, float x0, float y0, float startAngle, float endAngle, IntPtr userData)