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190 | /* -*- 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 .
*/
#include <memory>
#include "SlsCacheCompactor.hxx"
#include "SlsBitmapCompressor.hxx"
#include "SlsBitmapCache.hxx"
#include "SlsCacheConfiguration.hxx"
#include <rtl/ustring.hxx>
#include <sal/log.hxx>
#include <osl/diagnose.h>
#include <com/sun/star/uno/Any.hxx>
using namespace ::com::sun::star::uno;
namespace {
/** This is a trivial implementation of the CacheCompactor interface class.
It ignores calls to RequestCompaction() and thus will never decrease the
total size of off-screen preview bitmaps.
*/
class NoCacheCompaction
: public ::sd::slidesorter::cache::CacheCompactor
{
public:
NoCacheCompaction (
::sd::slidesorter::cache::BitmapCache& rCache,
sal_Int32 nMaximalCacheSize)
: CacheCompactor(rCache, nMaximalCacheSize)
{}
virtual void RequestCompaction() override { /* Ignored */ };
protected:
virtual void Run() override { /* Do nothing */ };
};
/** This implementation of the CacheCompactor interface class uses one of
several bitmap compression algorithms to reduce the number of the bytes
of the off-screen previews in the bitmap cache. See the documentation
of CacheCompactor::Create() for more details on configuration properties
that control the choice of compression algorithm.
*/
class CacheCompactionByCompression
: public ::sd::slidesorter::cache::CacheCompactor
{
public:
CacheCompactionByCompression (
::sd::slidesorter::cache::BitmapCache& rCache,
sal_Int32 nMaximalCacheSize,
const std::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor>& rpCompressor);
protected:
virtual void Run() override;
private:
std::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor> mpCompressor;
};
} // end of anonymous namespace
namespace sd::slidesorter::cache {
::std::unique_ptr<CacheCompactor> CacheCompactor::Create (
BitmapCache& rCache,
sal_Int32 nMaximalCacheSize)
{
static const char sNone[] = "None";
std::shared_ptr<BitmapCompressor> pCompressor;
OUString sCompressionPolicy("PNGCompression");
Any aCompressionPolicy (CacheConfiguration::Instance()->GetValue("CompressionPolicy"));
if (aCompressionPolicy.has<OUString>())
aCompressionPolicy >>= sCompressionPolicy;
if (sCompressionPolicy == sNone)
pCompressor = std::make_shared<NoBitmapCompression>();
else if (sCompressionPolicy == "Erase")
pCompressor = std::make_shared<CompressionByDeletion>();
else if (sCompressionPolicy == "ResolutionReduction")
pCompressor = std::make_shared<ResolutionReduction>();
else
pCompressor = std::make_shared<PngCompression>();
::std::unique_ptr<CacheCompactor> pCompactor;
OUString sCompactionPolicy("Compress");
Any aCompactionPolicy (CacheConfiguration::Instance()->GetValue("CompactionPolicy"));
if (aCompactionPolicy.has<OUString>())
aCompactionPolicy >>= sCompactionPolicy;
if (sCompactionPolicy == sNone)
pCompactor.reset(new NoCacheCompaction(rCache,nMaximalCacheSize));
else
pCompactor.reset(new CacheCompactionByCompression(rCache,nMaximalCacheSize,pCompressor));
return pCompactor;
}
void CacheCompactor::RequestCompaction()
{
if ( ! mbIsCompactionRunning && ! maCompactionTimer.IsActive())
maCompactionTimer.Start();
}
CacheCompactor::CacheCompactor(
BitmapCache& rCache,
sal_Int32 nMaximalCacheSize)
: mrCache(rCache),
mnMaximalCacheSize(nMaximalCacheSize),
mbIsCompactionRunning(false)
{
maCompactionTimer.SetTimeout(100);
maCompactionTimer.SetInvokeHandler(LINK(this,CacheCompactor,CompactionCallback));
}
IMPL_LINK_NOARG(CacheCompactor, CompactionCallback, Timer *, void)<--- syntax error
{
mbIsCompactionRunning = true;
try
{
Run();
}
catch (const css::uno::RuntimeException&)
{
}
catch (const css::uno::Exception&)
{
}
mbIsCompactionRunning = false;
}
} // end of namespace ::sd::slidesorter::cache
namespace {
//===== CacheCompactionByCompression ==========================================
CacheCompactionByCompression::CacheCompactionByCompression (
::sd::slidesorter::cache::BitmapCache& rCache,
sal_Int32 nMaximalCacheSize,
const std::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor>& rpCompressor)
: CacheCompactor(rCache,nMaximalCacheSize),
mpCompressor(rpCompressor)
{
}
void CacheCompactionByCompression::Run()
{
if (mrCache.GetSize() <= mnMaximalCacheSize)
return;
SAL_INFO("sd.sls", OSL_THIS_FUNC << ": bitmap cache uses too much space: " << mrCache.GetSize() << " > " << mnMaximalCacheSize);
::std::unique_ptr< ::sd::slidesorter::cache::BitmapCache::CacheIndex> pIndex (
mrCache.GetCacheIndex());
for (const auto& rpIndex : *pIndex)
{
if (rpIndex == nullptr)
continue;
mrCache.Compress(rpIndex, mpCompressor);
if (mrCache.GetSize() < mnMaximalCacheSize)
break;
}
mrCache.ReCalculateTotalCacheSize();
SAL_INFO("sd.sls", OSL_THIS_FUNC << ": there are now " << mrCache.GetSize() << " bytes occupied");
}
} // end of anonymous namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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