support converting images to 32-bit

not sure where this is coming from, but without it, I see
warning messages about bitmaps having the wrong depth

Change-Id: Iee1a68ced73333a22b811dc31afb32df14709f18
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/85946
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 14 insertions, 0 deletions

diff --git a/vcl/source/gdi/bitmap3.cxx b/vcl/source/gdi/bitmap3.cxx
index 68d590bc6eeb..0ee707089f26 100644
--- a/vcl/source/gdi/bitmap3.cxx
+++ b/vcl/source/gdi/bitmap3.cxx
@@ -305,6 +305,15 @@ bool Bitmap::Convert( BmpConversion eConversion )
         }
         break;
 
+        case BmpConversion::N32Bit:
+        {
+            if( nBitCount < 32 )
+                bRet = ImplConvertUp( 32 );
+            else
+                bRet = true;
+        }
+        break;
+
         case BmpConversion::Ghosted:
             bRet = ImplConvertGhosted();
         break;
@@ -884,6 +893,11 @@ void Bitmap::AdaptBitCount(Bitmap& rNew) const
                 rNew.Convert(BmpConversion::N24Bit);
                 break;
             }
+            case 32:
+            {
+                rNew.Convert(BmpConversion::N32Bit);
+                break;
+            }
             default:
             {
                 SAL_WARN("vcl", "BitDepth adaptation failed, from " << rNew.GetBitCount() << " to " << GetBitCount());