Is BitmapFromImage implemented in wxPerl?

No, BitmapFromImage doesn't exist, so it can't possibly be implement, there is no such thing as http://docs.wxwidgets.org/trunk/search.php?query=wxBitmapFromImage

What am I missing?

I guess sleep

Go to http://docs.wxwidgets.org/trunk/classwx_image.html and search for "bitmap" and you'll have your answer in about 5 seconds

Or go to http://docs.wxwidgets.org/stable/wx_wxbitmap.html and search for "wxImage"

Another avenue  [ddg://site:perlmonks.org Wx::Image Wx::Bitmap ] , [google://site:perlmonks.org Wx::Image Wx::StaticBitmapBitmap], ... site:perlmonks.org Wx::Image Wx::StaticBitmapBitmap, site:perlmonks.org Wx::Image Wx::StaticBitmapBitmap ...
-> Re^2: wxPerl image handling (short & sweet). (iewxPerl Tutorial 2)
-> Using wxMemoryDC to draw on a jpeg
-> Re^5: What's wrong with this Wx::Bitmap construction?
-> Re^3: Displaying changing images in Wx:: produces flicker
... stands for super search and or clicking and stuff

And another avenue is wxperl_usage / wxperl-usage / wxPerl::Usage / Class Method Browser , available methods, method invocation syntax, link to docs , type "wxbitmap::new" and you'll see

Usage: Wx::Bitmap::new(CLASS, ...)
Wx::Bitmap->new(
    ...,
)
wxBitmap
wxBitmap::new
wxBitmap::new
[download]

Usage: Wx::Bitmap::newImage(CLASS, image)

Wx::Bitmap->newImage(
    $image,
)
wxBitmap
wxBitmap::newImage
wxBitmap::newImage
[download]

Like my wxWidgets / wxPerl / wxGlade tutorial,http://www.wxperl.it/p/wxperl-primer.html explain, wxPerl will recognize that you're giving ->new a Wx::Image so it isn't necessary to call newImage explicitly