Convert 0RGB wxBitmaps to RGB when copying them to clipboard

Not all applications recognize properly 0RGB bitmap format so for the sake
of interoperability bitmaps in such format should be converted to plain
24 bpp RGB format prior to being copied to the clipboard.

Closes #17640.

docs/changes.txt

@@ -178,6 +178,7 @@ wxMSW:
 - Use cairo_win32_surface_create_with_format() to create ARGB surface from
   wxMemoryDC (Cairo >= 1.15.4).
 - Fix updating bounding box in wxDC::DrawSpline().
+- Fix placing 0RGB wxBitmaps on the clipboard.
 
 wxOSX:
 

src/msw/clipbrd.cpp

@@ -636,6 +636,26 @@ bool wxClipboard::AddData( wxDataObject *data )
 
     wxCHECK_MSG( data, false, wxT("data is invalid") );
 
+    const wxDataFormat format = data->GetPreferredFormat();
+    if ( format == wxDF_BITMAP || format == wxDF_DIB )
+    {
+        wxBitmapDataObject* bmpData = (wxBitmapDataObject*)data;
+        wxBitmap bmp = bmpData->GetBitmap();
+        wxASSERT_MSG( bmp.IsOk(), wxS("Invalid bitmap") );
+        // Replace 0RGB bitmap with its RGB copy
+        // to ensure compatibility with applications
+        // not recognizing bitmaps in 0RGB format.
+        if ( bmp.GetDepth() == 32 && !bmp.HasAlpha() )
+        {
+            wxBitmap bmpRGB(bmp.GetSize(), 24);
+            wxMemoryDC dc(bmpRGB);
+            dc.DrawBitmap(bmp, 0, 0);
+            dc.SelectObject(wxNullBitmap);
+
+            bmpData->SetBitmap(bmpRGB);
+        }
+    }
+
 #if wxUSE_OLE_CLIPBOARD
     HRESULT hr = OleSetClipboard(data->GetInterface());
     if ( FAILED(hr) )
@@ -664,8 +684,6 @@ bool wxClipboard::AddData( wxDataObject *data )
 #elif wxUSE_DATAOBJ
     wxCHECK_MSG( wxIsClipboardOpened(), false, wxT("clipboard not open") );
 
-    wxDataFormat format = data->GetPreferredFormat();
-
     switch ( format )
     {
         case wxDF_TEXT:
@@ -681,7 +699,7 @@ bool wxClipboard::AddData( wxDataObject *data )
         {
             wxBitmapDataObject* bitmapDataObject = (wxBitmapDataObject*) data;
             wxBitmap bitmap(bitmapDataObject->GetBitmap());
-            return wxSetClipboardData(data->GetPreferredFormat(), &bitmap);
+            return wxSetClipboardData(format, &bitmap);
         }
 
 #if wxUSE_METAFILE