3 files changed, 6 insertions, 0 deletions
diff --git a/vcl/inc/impbmp.hxx b/vcl/inc/impbmp.hxx
index feb94a8d6fd3..5787b3f0f755 100644
--- a/vcl/inc/impbmp.hxx
+++ b/vcl/inc/impbmp.hxx
@@ -72,6 +72,7 @@ public:
 
     bool                ImplScale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag );
     bool                ImplReplace( const Color& rSearchColor, const Color& rReplaceColor, sal_uLong nTol );
+    bool                ImplConvert( BmpConversion eConversion );
 };
 
 #endif // INCLUDED_VCL_INC_IMPBMP_HXX
diff --git a/vcl/inc/opengl/salbmp.hxx b/vcl/inc/opengl/salbmp.hxx
index 98e09b3c16eb..7577f9f2c3c8 100644
--- a/vcl/inc/opengl/salbmp.hxx
+++ b/vcl/inc/opengl/salbmp.hxx
@@ -80,6 +80,7 @@ public:
 
     bool            Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag ) override;
     bool            Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uLong nTol ) override;
+    bool            ConvertToGreyscale() override;
 
 public:
 
diff --git a/vcl/inc/salbmp.hxx b/vcl/inc/salbmp.hxx
index 574b11c79f1a..305f8a63f74d 100644
--- a/vcl/inc/salbmp.hxx
+++ b/vcl/inc/salbmp.hxx
@@ -69,6 +69,10 @@ public:
     virtual bool            Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag ) = 0;
     virtual bool            Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uLong nTol ) = 0;
 
+    virtual bool            ConvertToGreyscale()
+    {
+        return false;
+    }
 
     void GetChecksum(ChecksumType& rChecksum) const
     {