How to add mask effect to a image

I used setMaskPick but there is nothing happen in my image, so how should I do if I want to add mask in the image?

mask
[attachment=2]1.jpg[/attachment]

image
[attachment=1]2.jpg[/attachment]


MyGUI::StaticImagePtr flagImage = myGUI->createWidget<MyGUI::StaticImage>("StaticImage", MyGUI::IntCoord(), MyGUI::Align::Default, "Main");
flagImage->setSize(64, 64);
flagImage->setPosition(winWidth * 0.5 - 32, 10);
string flagName = player->tag + ".png";
flagImage->setImageTexture(flagName);
flagImage->setMaskPick("flag_screen_mask.png");


but the result.....
[attachment=0]3.jpg[/attachment]

setMaskPick is used for creating widgets with non-rectangle input form, it doesn't affect visuals of a widget.
MyGUI gives no way to do any modifications to images. You should use some Ogre's functionality to merge images and render into texture, or something like that.

setMaskPick is used for creating widgets with non-rectangle input form, it doesn't affect visuals of a widget.
MyGUI gives no way to do any modifications to images. You should use some Ogre's functionality to merge images and render into texture, or something like that.
Thanks for answering~
Ouch.................So There is no way to make the UI like this in OGRE+MyGUI?
[attachment=0]4.jpg[/attachment]

Simply use png images with alpha where necessary. Or prerender mixed images + mask in runtime and use those.