include/vcl/bitmap/Vectorizer.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <vcl/dllapi.h>
  23
  24 class GDIMetaFile;
  25 class BitmapEx;
  26
  27 namespace vcl
  28 {
  29
  30 /** Convert the bitmap to a meta file
  31  *
  32  * This works by putting continuous areas of the same color into
  33  * polygons painted in this color, by tracing the area's bounding
  34  * line.
  35  *
  36  * @param rMetafile
  37  * The resulting meta file
  38  *
  39  */
  40 class VCL_DLLPUBLIC Vectorizer
  41 {
  42 private:
  43     /** If not 0, minimal size of bound rects for individual polygons. Smaller ones are ignored. */
  44     sal_uInt8 mnReduce = 0;
  45     /** A callback for showing the progress of the vectorization */
  46     Link<tools::Long, void> const* mpProgress = nullptr;
  47
  48 public:
  49     Vectorizer(sal_uInt8 nReduce)
  50         : mnReduce(nReduce)
  51     {}
  52
  53     bool vectorize(BitmapEx const& rBitmap, GDIMetaFile& rMetafile);
  54
  55     void setProgressCallback(const Link<tools::Long,void>* pProgress)
  56     {
  57         mpProgress = pProgress;
  58     }
  59
  60     void updateProgress(tools::Long nProgress);
  61 };
  62
  63 }
  64
  65 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */