1 files changed, 60 insertions, 0 deletions
diff --git a/include/vcl/BitmapFilter.hxx b/include/vcl/BitmapFilter.hxx
new file mode 100644
index 000000000..c19d83b2d
--- /dev/null
+++ b/include/vcl/BitmapFilter.hxx
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+/* -*- 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/bitmapex.hxx>
+#include <functional>
+
+class Animation;
+
+namespace vcl::bitmap
+{
+// Generates strip ranges and run the input function with the start and
+// end as parameters. The additional parameter bLast denotes if the
+// iteration is the last one.
+//
+// Example:
+// first = 0, last = 100, STRIP_SIZE = 32
+// this will generate:
+// [0, 31, false], [32, 63, false], [64, 95, false], [96, 100, true]
+template <int STRIP_SIZE>
+void generateStripRanges(
+    tools::Long nFirst, tools::Long nLast,
+    std::function<void(tools::Long const nStart, tools::Long const nEnd, bool const bLast)>
+        aFunction)
+{
+    tools::Long nStart = nFirst;
+    for (; nStart < nLast - STRIP_SIZE; nStart += STRIP_SIZE)
+    {
+        tools::Long nEnd = nStart + STRIP_SIZE - 1;
+        aFunction(nStart, nEnd, false);
+    }
+    aFunction(nStart, nLast, true);
+}
+
+} // end vcl::bitmap
+
+class VCL_DLLPUBLIC BitmapFilter
+{
+public:
+    BitmapFilter();
+    virtual ~BitmapFilter();
+
+    virtual BitmapEx execute(BitmapEx const& rBitmapEx) const = 0;
+
+    static bool Filter(BitmapEx& rBmpEx, BitmapFilter const& rFilter);
+    static bool Filter(Animation& rBmpEx, BitmapFilter const& rFilter);
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */