BitmapInfoAccess.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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 *   ownership. The ASF licenses this file to you under the Apache
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 *   except in compliance with the License. You may obtain a copy of
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#include <vcl/BitmapInfoAccess.hxx>
 
#include <salbmp.hxx>
#include <svdata.hxx>
#include <salinst.hxx>
 
BitmapInfoAccess::BitmapInfoAccess(Bitmap& rBitmap, BitmapAccessMode nMode)
    : mpBuffer(nullptr)
    , mnAccessMode(nMode)
{
    std::shared_ptr<SalBitmap> xImpBmp = rBitmap.ImplGetSalBitmap();
 
    if (!xImpBmp)
        return;
 
    if (mnAccessMode == BitmapAccessMode::Write)
    {
        xImpBmp->DropScaledCache();
 
        if (xImpBmp.use_count() > 2)
        {
            xImpBmp.reset();
            rBitmap.ImplMakeUnique();
            xImpBmp = rBitmap.ImplGetSalBitmap();
        }
    }
 
    mpBuffer = xImpBmp->AcquireBuffer(mnAccessMode);
 
    if (!mpBuffer)
    {
        std::shared_ptr<SalBitmap> xNewImpBmp(ImplGetSVData()->mpDefInst->CreateSalBitmap());
        if (xNewImpBmp->Create(*xImpBmp, rBitmap.getPixelFormat()))
        {
            xImpBmp = xNewImpBmp;
            rBitmap.ImplSetSalBitmap(xImpBmp);
            mpBuffer = xImpBmp->AcquireBuffer(mnAccessMode);
        }
    }
 
    maBitmap = rBitmap;
}
 
BitmapInfoAccess::~BitmapInfoAccess()
{
    std::shared_ptr<SalBitmap> xImpBmp = maBitmap.ImplGetSalBitmap();
 
    if (mpBuffer && xImpBmp)
    {
        xImpBmp->ReleaseBuffer(mpBuffer, mnAccessMode);
    }
}
 
sal_uInt16 BitmapInfoAccess::GetBestPaletteIndex(const BitmapColor& rBitmapColor) const
{
    const BitmapBuffer* pBuffer = mpBuffer;
 
    return (HasPalette() ? pBuffer->maPalette.GetBestIndex(rBitmapColor) : 0);
}
 
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