vcl: Refactor scale "super" out of bitmap and make it independent

Introduce BitmapFilter as a general bitmap filtering class, and
make scale "super" algorithem independent as BitmapScaleSuper
which uses BitmapFilter as superclass.

This is an ongoing work to make some bitmap algorithms structured
and more independent from the big bitmap class This will make them
easier to work with, test and optimize.

Change-Id: I37d29709b2af95cab2f6da21129302f5be79318b

2 files changed, 64 insertions, 0 deletions

diff --git a/include/vcl/bitmapfilter.hxx b/include/vcl/bitmapfilter.hxx
new file mode 100644
index 000000000000..37cdac1638d7
--- /dev/null
+++ b/include/vcl/bitmapfilter.hxx
@@ -0,0 +1,26 @@
+/* -*- 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_BITMAPFILTER_HXX
+#define INCLUDED_VCL_BITMAPFILTER_HXX
+
+#include <vcl/bitmap.hxx>
+
+class VCL_DLLPUBLIC BitmapFilter
+{
+public:
+    BitmapFilter();
+    virtual ~BitmapFilter();
+    virtual bool filter(Bitmap& rBitmap) = 0;
+};
+
+#endif // INCLUDED_VCL_BITMAPFILTER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/vcl/bitmapscalesuper.hxx b/include/vcl/bitmapscalesuper.hxx
new file mode 100644
index 000000000000..3b59b9910ee1
--- /dev/null
+++ b/include/vcl/bitmapscalesuper.hxx
@@ -0,0 +1,38 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <vcl/bitmapfilter.hxx>
+
+#ifndef INCLUDED_VCL_BITMAPSCALESUPER_HXX
+#define INCLUDED_VCL_BITMAPSCALESUPER_HXX
+
+class VCL_DLLPUBLIC BitmapScaleSuper : public BitmapFilter
+{
+    double mrScaleX;
+    double mrScaleY;
+
+public:
+    BitmapScaleSuper(const double& rScaleX, const double& rScaleY);
+    virtual ~BitmapScaleSuper();
+    virtual bool filter(Bitmap& rBitmap) SAL_OVERRIDE;
+};
+
+#endif // INCLUDED_VCL_BITMAPSCALESUPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */