File bsc1200009.patch of Package libreoffice.26317

Index: libreoffice-7.3.6.2/oox/source/export/drawingml.cxx
===================================================================
--- libreoffice-7.3.6.2.orig/oox/source/export/drawingml.cxx
+++ libreoffice-7.3.6.2/oox/source/export/drawingml.cxx
@@ -2162,6 +2162,22 @@ void DrawingML::WriteRunProperties( cons
                 // TODO: special handle embossed/engraved
                 WriteSolidFill(color, nTransparency);
             }
+            else if (GetDocumentType() == DOCUMENT_PPTX)
+            {
+                // Resolve COL_AUTO for PPTX since MS Powerpoint doesn't have automatic colors.
+                bool bIsTextBackgroundDark = mbIsBackgroundDark;
+                if (rXShapePropSet.is() && GetProperty(rXShapePropSet, "FillStyle")
+                    && mAny.get<FillStyle>() != FillStyle_NONE
+                    && GetProperty(rXShapePropSet, "FillColor"))
+                {
+                    ::Color aShapeFillColor(ColorTransparency, mAny.get<sal_uInt32>());
+                    bIsTextBackgroundDark = aShapeFillColor.IsDark();
+                }
+                if (bIsTextBackgroundDark)
+                    WriteSolidFill(COL_WHITE);
+                else
+                    WriteSolidFill(COL_BLACK);
+            }
         }
     }