File indexing completed on 2024-05-19 11:38:33

0001 /*
0002     Large image displaying library.
0003 
0004     Copyright (C) 2004 Maks Orlovich (maksim@kde.org)
0005 
0006     Permission is hereby granted, free of charge, to any person obtaining a copy
0007     of this software and associated documentation files (the "Software"), to deal
0008     in the Software without restriction, including without limitation the rights
0009     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
0010     copies of the Software, and to permit persons to whom the Software is
0011     furnished to do so, subject to the following conditions:
0012 
0013     The above copyright notice and this permission notice shall be included in
0014     all copies or substantial portions of the Software.
0015 
0016     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0017     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0018     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
0019     AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
0020     AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0021     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
0022 
0023 */
0024 
0025 #ifndef IMAGE_MANAGER_H
0026 #define IMAGE_MANAGER_H
0027 
0028 #include "animtimer.h"
0029 #include "loaderdatabase.h"
0030 #include "tilecache.h"
0031 #include "updater.h"
0032 
0033 class QPixmap;
0034 
0035 namespace khtmlImLoad
0036 {
0037 
0038 class ImageManager
0039 {
0040 private:
0041     static AnimTimer *anmTimer;
0042     static TileCache *imgCache;
0043     static TileCache *pixCache;
0044     static LoaderDatabase *loaderDB;
0045     static Updater        *theUpdater;
0046     static QPixmap        *emptyPix;
0047 
0048     static unsigned int pixmapCacheSize();
0049     static unsigned int imageCacheSize();
0050 
0051     static void initLoaders();
0052 public:
0053     // IMPORTANT: Don't even think about changing these to signed; it's security-critical
0054     // This method determines whether we'll ever accept an image so large
0055     static bool isAcceptableSize(unsigned width, unsigned height);
0056 
0057     // IMPORTANT: Don't even think about changing these to signed; it's security-critical
0058     // Says whether the target size is OK to scale an image too. This is much
0059     // bigger than the above, as we store the actual data in the tile cache, so
0060     // we just need some control information, which is much smaller
0061     static bool isAcceptableScaleSize(unsigned width, unsigned height);
0062 
0063     static AnimTimer *animTimer()
0064     {
0065         if (!anmTimer) {
0066             anmTimer = new AnimTimer();
0067         }
0068         return anmTimer;
0069     }
0070 
0071     static TileCache *imageCache()
0072     {
0073         if (!imgCache) {
0074             imgCache = new TileCache(imageCacheSize());
0075         }
0076         return imgCache;
0077     }
0078 
0079     static TileCache *pixmapCache()
0080     {
0081         if (!pixCache) {
0082             pixCache = new TileCache(pixmapCacheSize());
0083         }
0084         return pixCache;
0085     }
0086 
0087     static Updater *updater()
0088     {
0089         if (!theUpdater) {
0090             theUpdater = new Updater();
0091         }
0092         return theUpdater;
0093     }
0094 
0095     static LoaderDatabase *loaderDatabase()
0096     {
0097         if (!loaderDB) {
0098             loaderDB = new LoaderDatabase();
0099             initLoaders(); //Register built-in decoders
0100         }
0101         return loaderDB;
0102     }
0103 };
0104 
0105 }
0106 
0107 #endif