tdf#42982 Make UNO error reporting more descriptive

Change-Id: I1f1c8285a1d41a9c9694a54c0bdfb20c6f0b27ed
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/141512
Tested-by: Jenkins
Tested-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
diff --git a/canvas/source/directx/dx_bitmap.cxx b/canvas/source/directx/dx_bitmap.cxx
index d1f683d..880e51e 100644
--- a/canvas/source/directx/dx_bitmap.cxx
+++ b/canvas/source/directx/dx_bitmap.cxx
@@ -154,7 +154,7 @@ namespace dxcanvas
                                                      // getMemoryLayout
                                                      &aBmpData ) )
        {
            throw uno::RuntimeException();
            throw uno::RuntimeException("Internal error while writing BitmapData into Bitmap");
        }

        // commit data to bitmap
@@ -177,7 +177,7 @@ namespace dxcanvas
        if( Gdiplus::Ok != mpBitmap->SetPixel( pos.X, pos.Y,
                                                      Gdiplus::Color( tools::sequenceToArgb( color ))))
        {
            throw uno::RuntimeException();
            throw uno::RuntimeException("SetPixel called with invalid x,y points or color");
        }
    }