vcl: move Vectorize out of Bitmap - add Vectorizer class

Change-Id: I991b6e908d4139723c2d408d4ba3586676fded18
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/164693
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

2 files changed, 65 insertions, 20 deletions

diff --git a/include/vcl/bitmap.hxx b/include/vcl/bitmap.hxx
index dbe8a364f712..24cc1245e1f5 100644
--- a/include/vcl/bitmap.hxx
+++ b/include/vcl/bitmap.hxx
@@ -503,26 +503,6 @@ public:
                                 size_t nColorCount,
                                 sal_uInt8 const * pTols );
 
-    /** Convert the bitmap to a meta file
-
-        This works by putting continuous areas of the same color into
-        polygons painted in this color, by tracing the area's bounding
-        line.
-
-        @param rMtf
-        The resulting meta file
-
-        @param cReduce
-        If non-null, minimal size of bound rects for individual polygons. Smaller ones are ignored.
-
-        @param pProgress
-        A callback for showing the progress of the vectorization
-     */
-    void                    Vectorize(
-                                GDIMetaFile& rMtf,
-                                sal_uInt8 cReduce,
-                                const Link<tools::Long,void>* pProgress );
-
     /** Change various global color characteristics
 
         @param nLuminancePercent
diff --git a/include/vcl/bitmap/Vectorizer.hxx b/include/vcl/bitmap/Vectorizer.hxx
new file mode 100644
index 000000000000..225d924233ae
--- /dev/null
+++ b/include/vcl/bitmap/Vectorizer.hxx
@@ -0,0 +1,65 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <vcl/dllapi.h>
+
+class GDIMetaFile;
+class BitmapEx;
+
+namespace vcl
+{
+
+/** Convert the bitmap to a meta file
+ *
+ * This works by putting continuous areas of the same color into
+ * polygons painted in this color, by tracing the area's bounding
+ * line.
+ *
+ * @param rMetafile
+ * The resulting meta file
+ *
+ */
+class VCL_DLLPUBLIC Vectorizer
+{
+private:
+    /** If not 0, minimal size of bound rects for individual polygons. Smaller ones are ignored. */
+    sal_uInt8 mnReduce = 0;
+    /** A callback for showing the progress of the vectorization */
+    Link<tools::Long, void> const* mpProgress = nullptr;
+
+public:
+    Vectorizer(sal_uInt8 nReduce)
+        : mnReduce(nReduce)
+    {}
+
+    bool vectorize(BitmapEx const& rBitmap, GDIMetaFile& rMetafile);
+
+    void setProgressCallback(const Link<tools::Long,void>* pProgress)
+    {
+        mpProgress = pProgress;
+    }
+
+    void updateProgress(tools::Long nProgress);
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */