+
+#if wxUSE_IMAGE
+ // check if we don't have alpha in this bitmap -- we can create a mask
+ // from it (and we need to do it for the older systems which don't
+ // support 32bpp bitmaps natively)
+ if ( !pMask )
+ {
+ wxImage img(bitmap.ConvertToImage());
+ if ( img.HasAlpha() )
+ {
+ img.ConvertAlphaToMask();
+ bitmapWithMask = wxBitmap(img);
+ pMask = bitmapWithMask.GetMask();
+ }
+ }
+#endif // wxUSE_IMAGE
+