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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 :
21 : #include "SlsCacheCompactor.hxx"
22 :
23 : #include "SlsBitmapCompressor.hxx"
24 : #include "SlsBitmapCache.hxx"
25 : #include "SlsCacheConfiguration.hxx"
26 :
27 : #include <rtl/ustring.hxx>
28 : #include <com/sun/star/uno/Any.hxx>
29 : #include <set>
30 :
31 : using namespace ::com::sun::star::uno;
32 :
33 : namespace {
34 :
35 : /** This is a trivial implementation of the CacheCompactor interface class.
36 : It ignores calls to RequestCompaction() and thus will never decrease the
37 : total size of off-screen preview bitmaps.
38 : */
39 0 : class NoCacheCompaction
40 : : public ::sd::slidesorter::cache::CacheCompactor
41 : {
42 : public:
43 0 : NoCacheCompaction (
44 : ::sd::slidesorter::cache::BitmapCache& rCache,
45 : sal_Int32 nMaximalCacheSize)
46 0 : : CacheCompactor(rCache, nMaximalCacheSize)
47 0 : {}
48 :
49 0 : virtual void RequestCompaction (void) { /* Ignored */ };
50 :
51 : protected:
52 0 : virtual void Run (void) { /* Do nothing */ };
53 : };
54 :
55 :
56 :
57 :
58 : /** This implementation of the CacheCompactor interface class uses one of
59 : several bitmap compression algorithms to reduce the number of the bytes
60 : of the off-screen previews in the bitmap cache. See the documentation
61 : of CacheCompactor::Create() for more details on configuration properties
62 : that control the choice of compression algorithm.
63 : */
64 0 : class CacheCompactionByCompression
65 : : public ::sd::slidesorter::cache::CacheCompactor
66 : {
67 : public:
68 : CacheCompactionByCompression (
69 : ::sd::slidesorter::cache::BitmapCache& rCache,
70 : sal_Int32 nMaximalCacheSize,
71 : const ::boost::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor>& rpCompressor);
72 :
73 : protected:
74 : virtual void Run (void);
75 :
76 : private:
77 : ::boost::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor> mpCompressor;
78 : };
79 :
80 :
81 : } // end of anonymous namespace
82 :
83 : namespace sd { namespace slidesorter { namespace cache {
84 :
85 : SAL_WNODEPRECATED_DECLARATIONS_PUSH
86 0 : ::std::auto_ptr<CacheCompactor> CacheCompactor::Create (
87 : BitmapCache& rCache,
88 : sal_Int32 nMaximalCacheSize)
89 : {
90 0 : static const ::rtl::OUString sNone ("None");
91 0 : static const ::rtl::OUString sCompress ("Compress");
92 0 : static const ::rtl::OUString sErase ("Erase");
93 0 : static const ::rtl::OUString sResolution ("ResolutionReduction");
94 0 : static const ::rtl::OUString sPNGCompression ("PNGCompression");
95 :
96 0 : ::boost::shared_ptr<BitmapCompressor> pCompressor;
97 0 : ::rtl::OUString sCompressionPolicy(sPNGCompression);
98 0 : Any aCompressionPolicy (CacheConfiguration::Instance()->GetValue("CompressionPolicy"));
99 0 : if (aCompressionPolicy.has<rtl::OUString>())
100 0 : aCompressionPolicy >>= sCompressionPolicy;
101 0 : if (sCompressionPolicy == sNone)
102 0 : pCompressor.reset(new NoBitmapCompression());
103 0 : else if (sCompressionPolicy == sErase)
104 0 : pCompressor.reset(new CompressionByDeletion());
105 0 : else if (sCompressionPolicy == sResolution)
106 0 : pCompressor.reset(new ResolutionReduction());
107 : else
108 0 : pCompressor.reset(new PngCompression());
109 :
110 0 : ::std::auto_ptr<CacheCompactor> pCompactor (NULL);
111 0 : ::rtl::OUString sCompactionPolicy(sCompress);
112 0 : Any aCompactionPolicy (CacheConfiguration::Instance()->GetValue("CompactionPolicy"));
113 0 : if (aCompactionPolicy.has<rtl::OUString>())
114 0 : aCompactionPolicy >>= sCompactionPolicy;
115 0 : if (sCompactionPolicy == sNone)
116 0 : pCompactor.reset(new NoCacheCompaction(rCache,nMaximalCacheSize));
117 : else
118 0 : pCompactor.reset(new CacheCompactionByCompression(rCache,nMaximalCacheSize,pCompressor));
119 :
120 0 : return pCompactor;
121 : }
122 : SAL_WNODEPRECATED_DECLARATIONS_POP
123 :
124 :
125 :
126 :
127 0 : void CacheCompactor::RequestCompaction (void)
128 : {
129 0 : if ( ! mbIsCompactionRunning && ! maCompactionTimer.IsActive())
130 0 : maCompactionTimer.Start();
131 0 : }
132 :
133 :
134 :
135 :
136 0 : CacheCompactor::CacheCompactor(
137 : BitmapCache& rCache,
138 : sal_Int32 nMaximalCacheSize)
139 : : mrCache(rCache),
140 : mnMaximalCacheSize(nMaximalCacheSize),
141 0 : mbIsCompactionRunning(false)
142 : {
143 0 : maCompactionTimer.SetTimeout(100 /*ms*/);
144 0 : maCompactionTimer.SetTimeoutHdl(LINK(this,CacheCompactor,CompactionCallback));
145 :
146 0 : }
147 :
148 :
149 :
150 :
151 0 : IMPL_LINK_NOARG(CacheCompactor, CompactionCallback)
152 : {
153 0 : mbIsCompactionRunning = true;
154 :
155 : try
156 : {
157 0 : Run();
158 : }
159 0 : catch (const ::com::sun::star::uno::RuntimeException&)
160 : {
161 : }
162 0 : catch (const ::com::sun::star::uno::Exception&)
163 : {
164 : }
165 :
166 0 : mbIsCompactionRunning = false;
167 0 : return 1;
168 : }
169 :
170 :
171 :
172 :
173 : } } } // end of namespace ::sd::slidesorter::cache
174 :
175 :
176 :
177 :
178 : namespace {
179 :
180 : //===== CacheCompactionByCompression ==========================================
181 :
182 0 : CacheCompactionByCompression::CacheCompactionByCompression (
183 : ::sd::slidesorter::cache::BitmapCache& rCache,
184 : sal_Int32 nMaximalCacheSize,
185 : const ::boost::shared_ptr< ::sd::slidesorter::cache::BitmapCompressor>& rpCompressor)
186 : : CacheCompactor(rCache,nMaximalCacheSize),
187 0 : mpCompressor(rpCompressor)
188 : {
189 0 : }
190 :
191 :
192 :
193 :
194 0 : void CacheCompactionByCompression::Run (void)
195 : {
196 0 : if (mrCache.GetSize() > mnMaximalCacheSize)
197 : {
198 : SAL_INFO("sd.sls", OSL_THIS_FUNC << ": bitmap cache uses to much space: " << mrCache.GetSize() << " > " << mnMaximalCacheSize);
199 :
200 : SAL_WNODEPRECATED_DECLARATIONS_PUSH
201 : ::std::auto_ptr< ::sd::slidesorter::cache::BitmapCache::CacheIndex> pIndex (
202 0 : mrCache.GetCacheIndex(false,false));
203 : SAL_WNODEPRECATED_DECLARATIONS_POP
204 0 : ::sd::slidesorter::cache::BitmapCache::CacheIndex::iterator iIndex;
205 0 : for (iIndex=pIndex->begin(); iIndex!=pIndex->end(); ++iIndex)
206 : {
207 0 : if (*iIndex == NULL)
208 0 : continue;
209 :
210 0 : mrCache.Compress(*iIndex, mpCompressor);
211 0 : if (mrCache.GetSize() < mnMaximalCacheSize)
212 0 : break;
213 : }
214 0 : mrCache.ReCalculateTotalCacheSize();
215 0 : SAL_INFO("sd.sls", OSL_THIS_FUNC << ": there are now " << mrCache.GetSize() << " bytes occupied");
216 : }
217 0 : }
218 :
219 :
220 : } // end of anonymous namespace
221 :
222 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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