MHuiBitmapProvider is an interface that provides a bitmap and its alpha mask when requested.

By storing MHuiBitmapProviders in the CHuiTextureManager we can delete and regenerate the textures used by the toolkit as needed - enabling improved use of memory resource, such as when the application goes to background. In this case, when we want to restore all the textures, we may just recall the providers to reload the textures.

Typically, control classes would implement the ProvideBitmapL method of this class, which would handle all the loading or generation needed to produce the bitmaps stored by the TextureManager.

A provider should exist as long as the associated texture is stored within the texture manager.