_SetViewBitmap
status_t _SetViewBitmap(const BBitmap* bitmap,
_SetViewBitmap(bitmap, srcRect, dstRect, followFlags, options);
_SetViewBitmap(bitmap, rect, rect, followFlags, options);
_SetViewBitmap(NULL, BRect(), BRect(), 0, 0);
status_t status = _SetViewBitmap(overlay, srcRect, dstRect, followFlags,
_SetViewBitmap(NULL, BRect(), BRect(), 0, 0);