canvas/source/opengl/ogl_texturecache.hxx

   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
  10 #ifndef INCLUDED_CANVAS_SOURCE_OPENGL_OGL_TEXTURECACHE_HXX
  11 #define INCLUDED_CANVAS_SOURCE_OPENGL_OGL_TEXTURECACHE_HXX
  12
  13 #include <sal/types.h>
  14 #include <unordered_map>
  15
  16 namespace com { namespace sun { namespace star {
  17     namespace geometry { struct IntegerSize2D; }
  18 }}}
  19
  20 namespace oglcanvas
  21 {
  22     class TextureCache
  23     {
  24     public:
  25         TextureCache();
  26         ~TextureCache();
  27
  28         /// clear whole cache, reset statistic counters
  29         void flush();
  30
  31         /** prune old entries from cache
  32
  33             Every time this method is called, all cache entries are set
  34             to "old". If subsequently not used by getTexture(),
  35             they'll be entitled for expunge on the next prune()
  36             call. Resets statistic counters.
  37          */
  38         void prune();
  39
  40         /// Statistics
  41         size_t getCacheSize() const { return maCache.size(); };
  42         sal_uInt32 getCacheMissCount() const { return mnMissCount; }
  43         sal_uInt32 getCacheHitCount() const { return mnHitCount; }
  44
  45         unsigned int getTexture( const ::com::sun::star::geometry::IntegerSize2D& rPixelSize,
  46                                  const sal_Int8*                                  pPixel,
  47                                  sal_uInt32                                       nPixelCrc32) const;
  48     private:
  49         struct CacheEntry
  50         {
  51             CacheEntry() : nTexture(0), bOld(false) {}
  52             unsigned int nTexture;
  53             bool bOld;
  54         };
  55         typedef std::unordered_map<sal_uInt32,CacheEntry> TextureCacheMapT;
  56         mutable TextureCacheMapT maCache;
  57         mutable sal_uInt32       mnMissCount;
  58         mutable sal_uInt32       mnHitCount;
  59     };
  60 }
  61
  62 #endif
  63
  64 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */