11. Alpha blending transparency mask. Uses a png alpha channel. 12. The event mask that decides what kind of GdkEvents this widget gets 13. Image and mask have different sizes. 14. Failed to set signal mask: %d 15. Remove zones of the video using a picture as mask 16. Could not set signal mask! 17. The modifier mask of the accelerator 18. Allow H.239 per Content Role Mask 19. Alpha mask video filter 20. Bitmap to use as a mask when drawing the text background
