2 files changed, 34 insertions, 1 deletions
diff --git a/include/vcl/BitmapConvolutionMatrixFilter.hxx b/include/vcl/BitmapConvolutionMatrixFilter.hxx
index d27bfffb0fcd..a2189326322b 100644
--- a/include/vcl/BitmapConvolutionMatrixFilter.hxx
+++ b/include/vcl/BitmapConvolutionMatrixFilter.hxx
@@ -20,6 +20,11 @@ class BitmapEx;
 class VCL_DLLPUBLIC BitmapConvolutionMatrixFilter : public BitmapFilter
 {
 public:
+    BitmapConvolutionMatrixFilter()
+        : mpMatrix(nullptr)
+    {
+    }
+
     BitmapConvolutionMatrixFilter(const long* pMatrix)
         : mpMatrix(pMatrix)
     {
@@ -29,7 +34,7 @@ public:
 
     virtual BitmapEx execute(BitmapEx const& rBitmapEx) override;
 
-private:
+protected:
     const long* mpMatrix;
 };
 
diff --git a/include/vcl/BitmapSharpenFilter.hxx b/include/vcl/BitmapSharpenFilter.hxx
new file mode 100644
index 000000000000..7e965976d5e8
--- /dev/null
+++ b/include/vcl/BitmapSharpenFilter.hxx
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#ifndef INCLUDED_VCL_BITMAPSHARPENFILTER_HXX
+#define INCLUDED_VCL_BITMAPSHARPENFILTER_HXX
+
+#include <vcl/BitmapConvolutionMatrixFilter.hxx>
+
+class VCL_DLLPUBLIC BitmapSharpenFilter : public BitmapConvolutionMatrixFilter
+{
+public:
+    BitmapSharpenFilter()
+    {
+        const long pSharpenMatrix[] = { -1, -1, -1, -1, 16, -1, -1, -1, -1 };
+        mpMatrix = &pSharpenMatrix[0];
+    }
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */