how to stretch a masked image?

[sunkingac]

hai all,

I am developing an application in VC++ 6.0, which is then migrated to WinCE using eVC++ 4.0.

In my appln., i have to place a masked bitmap ( masking the original bitmap with a mask bitmap) on a dialog.
Also, i have to stretch the masked bitmap and the dialog to fit to the target device screen.

I don't know how to stretch the masked bitmap.

Please help me.

With thanks and Regards,
T.Arun Chakaravarthy

[Marc G]

That depends on what kind of masked image it is...
Is it a black/white mask: then you can try to stretch the image with some filtering and stretch the mask with the same amount but without any filtering.
If the mask is a grayscale mask, you can try to stretch both the image and the mask with filtering and see what that gives.

In any case, I think it's much better to recreate the bitmap to the correct dimensions instead of scaling it at runtime, certainly if it is for some GUI element.