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/* -*- 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 "SlsCacheCompactor.hxx"
#include "SlsBitmapCompressor.hxx"
#include "SlsBitmapCache.hxx"
#include "SlsCacheConfiguration.hxx"
#include <rtl/ustring.hxx>
#include <com/sun/star/uno/Any.hxx>
#include <set>
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 (void) SAL_OVERRIDE { /* Ignored */ };
protected:
virtual void Run (void) SAL_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 ::boost::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor>& rpCompressor);
protected:
virtual void Run (void) SAL_OVERRIDE;
private:
::boost::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor> mpCompressor;
};
} // end of anonymous namespace
namespace sd { namespace slidesorter { namespace cache {
SAL_WNODEPRECATED_DECLARATIONS_PUSH
::std::auto_ptr<CacheCompactor> CacheCompactor::Create (
BitmapCache& rCache,
sal_Int32 nMaximalCacheSize)
{
static const OUString sNone ("None");
static const OUString sCompress ("Compress");
static const OUString sErase ("Erase");
static const OUString sResolution ("ResolutionReduction");
static const OUString sPNGCompression ("PNGCompression");
::boost::shared_ptr<BitmapCompressor> pCompressor;
OUString sCompressionPolicy(sPNGCompression);
Any aCompressionPolicy (CacheConfiguration::Instance()->GetValue("CompressionPolicy"));
if (aCompressionPolicy.has<OUString>())
aCompressionPolicy >>= sCompressionPolicy;
if (sCompressionPolicy == sNone)
pCompressor.reset(new NoBitmapCompression());
else if (sCompressionPolicy == sErase)
pCompressor.reset(new CompressionByDeletion());
else if (sCompressionPolicy == sResolution)
pCompressor.reset(new ResolutionReduction());
else
pCompressor.reset(new PngCompression());
::std::auto_ptr<CacheCompactor> pCompactor (NULL);
OUString sCompactionPolicy(sCompress);
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;
}
SAL_WNODEPRECATED_DECLARATIONS_POP
void CacheCompactor::RequestCompaction (void)
{
if ( ! mbIsCompactionRunning && ! maCompactionTimer.IsActive())
maCompactionTimer.Start();
}
CacheCompactor::CacheCompactor(
BitmapCache& rCache,
sal_Int32 nMaximalCacheSize)
: mrCache(rCache),
mnMaximalCacheSize(nMaximalCacheSize),
mbIsCompactionRunning(false)
{
maCompactionTimer.SetTimeout(100 /*ms*/);
maCompactionTimer.SetTimeoutHdl(LINK(this,CacheCompactor,CompactionCallback));
}
IMPL_LINK_NOARG(CacheCompactor, CompactionCallback)
{
mbIsCompactionRunning = true;
try
{
Run();
}
catch (const ::com::sun::star::uno::RuntimeException&)
{
}
catch (const ::com::sun::star::uno::Exception&)
{
}
mbIsCompactionRunning = false;
return 1;
}
} } } // end of namespace ::sd::slidesorter::cache
namespace {
//===== CacheCompactionByCompression ==========================================
CacheCompactionByCompression::CacheCompactionByCompression (
::sd::slidesorter::cache::BitmapCache& rCache,
sal_Int32 nMaximalCacheSize,
const ::boost::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor>& rpCompressor)
: CacheCompactor(rCache,nMaximalCacheSize),
mpCompressor(rpCompressor)
{
}
void CacheCompactionByCompression::Run (void)
{
if (mrCache.GetSize() > mnMaximalCacheSize)
{
SAL_INFO("sd.sls", OSL_THIS_FUNC << ": bitmap cache uses to much space: " << mrCache.GetSize() << " > " << mnMaximalCacheSize);
SAL_WNODEPRECATED_DECLARATIONS_PUSH
::std::auto_ptr< ::sd::slidesorter::cache::BitmapCache::CacheIndex> pIndex (
mrCache.GetCacheIndex(false,false));
SAL_WNODEPRECATED_DECLARATIONS_POP
::sd::slidesorter::cache::BitmapCache::CacheIndex::iterator iIndex;
for (iIndex=pIndex->begin(); iIndex!=pIndex->end(); ++iIndex)
{
if (*iIndex == NULL)
continue;
mrCache.Compress(*iIndex, 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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