Blending modes used for compositing. The current blend mode determines how a fill or stroke is composited to the current framebuffer. See here for more information on the different blending modes.

type t =
  1. | Zero
  2. | One
  3. | Src_color
  4. | One_minus_src_color
  5. | Dst_color
  6. | One_minus_dst_color
  7. | Src_alpha
  8. | One_minus_src_alpha
  9. | Dst_alpha
  10. | One_minus_dst_alpha
  11. | Src_alpha_saturate