vcl/source/bitmap/BitmapInfoAccess.cxx

   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 #include <vcl/BitmapInfoAccess.hxx>
  21
  22 #include <salbmp.hxx>
  23 #include <svdata.hxx>
  24 #include <salinst.hxx>
  25
  26 BitmapInfoAccess::BitmapInfoAccess(Bitmap& rBitmap, BitmapAccessMode nMode)
  27     : mpBuffer(nullptr)
  28     , mnAccessMode(nMode)
  29 {
  30     std::shared_ptr<SalBitmap> xImpBmp = rBitmap.ImplGetSalBitmap();
  31
  32     if (!xImpBmp)
  33         return;
  34
  35     if (mnAccessMode == BitmapAccessMode::Write)
  36     {
  37         xImpBmp->DropScaledCache();
  38
  39         if (xImpBmp.use_count() > 2)
  40         {
  41             xImpBmp.reset();
  42             rBitmap.ImplMakeUnique();
  43             xImpBmp = rBitmap.ImplGetSalBitmap();
  44         }
  45     }
  46
  47     mpBuffer = xImpBmp->AcquireBuffer(mnAccessMode);
  48
  49     if (!mpBuffer)
  50     {
  51         std::shared_ptr<SalBitmap> xNewImpBmp(ImplGetSVData()->mpDefInst->CreateSalBitmap());
  52         if (xNewImpBmp->Create(*xImpBmp, rBitmap.getPixelFormat()))
  53         {
  54             xImpBmp = xNewImpBmp;
  55             rBitmap.ImplSetSalBitmap(xImpBmp);
  56             mpBuffer = xImpBmp->AcquireBuffer(mnAccessMode);
  57         }
  58     }
  59
  60     maBitmap = rBitmap;
  61 }
  62
  63 BitmapInfoAccess::~BitmapInfoAccess()
  64 {
  65     std::shared_ptr<SalBitmap> xImpBmp = maBitmap.ImplGetSalBitmap();
  66
  67     if (mpBuffer && xImpBmp)
  68     {
  69         xImpBmp->ReleaseBuffer(mpBuffer, mnAccessMode);
  70     }
  71 }
  72
  73 sal_uInt16 BitmapInfoAccess::GetBestPaletteIndex(const BitmapColor& rBitmapColor) const
  74 {
  75     const BitmapBuffer* pBuffer = mpBuffer;
  76
  77     return (HasPalette() ? pBuffer->maPalette.GetBestIndex(rBitmapColor) : 0);
  78 }
  79
  80 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */