File indexing completed on 2024-05-12 17:06:31

 #ifndef oxygen_shadowCacheh
 #define oxygen_shadowCacheh
 
 //////////////////////////////////////////////////////////////////////////////
 // oxygenshadowcache.h
 // handles caching of TileSet objects to draw shadows
 // -------------------
 //
 // SPDX-FileCopyrightText: 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
 //
 // SPDX-License-Identifier: MIT
 //////////////////////////////////////////////////////////////////////////////
 
 #include "oxygen_export.h"
 #include "oxygenhelper.h"
 
 #include <QCache>
 #include <QRadialGradient>
 #include <cmath>
 
 namespace Oxygen
 {
 
 class OXYGEN_EXPORT ShadowCache
 {
 public:
     //* constructor
     explicit ShadowCache(Helper &);
 
     //* read configuration
     void readConfig(void);
 
     //* animations duration
     void setAnimationsDuration(int);
 
     //* cache size
     void setEnabled(bool enabled)
     {
         _enabled = enabled;
         if (enabled) {
             _shadowCache.setMaxCost(1 << 6);
             _animatedShadowCache.setMaxCost(_maxIndex << 6);
 
         } else {
             _shadowCache.setMaxCost(1);
             _animatedShadowCache.setMaxCost(1);
         }
     }
 
     //* max animation index
     int maxIndex(void) const
     {
         return _maxIndex;
     }
 
     //* max animation index
     void setMaxIndex(int value)
     {
         _maxIndex = value;
         if (_enabled) {
             _shadowCache.setMaxCost(1 << 6);
             _animatedShadowCache.setMaxCost(_maxIndex << 6);
         }
     }
 
     //* invalidate caches
     void invalidateCaches(void)
     {
         _shadowCache.clear();
         _animatedShadowCache.clear();
     }
 
     //* true if shadow is enabled for a given group
     bool isEnabled(QPalette::ColorGroup) const;
 
     //* set shadow size manually
     void setShadowSize(QPalette::ColorGroup, int);
 
     //* shadow size
     int shadowSize(void) const;
 
     //* Key class to be used into QCache
     /*! class is entirely inline for optimization */
     class Key
     {
     public:
         //* explicit constructor
         explicit Key(void)
         {
         }
 
         //* constructor from int
         explicit Key(int hash)
             : index(hash >> 3)
             , active((hash >> 2) & 1)
             , isShade((hash >> 1) & 1)
             , hasBorder((hash)&1)
         {
         }
 
         //* hash function
         int hash(void) const
         {
             return (index << 3) | (active << 2) | (isShade << 1) | (hasBorder);
         }
 
         int index = 0;
         bool active = false;
         bool isShade = false;
         bool hasBorder = true;
     };
 
     //* get shadow matching client
     TileSet tileSet(const Key &);
 
     //* get shadow matching client and opacity
     TileSet tileSet(Key, qreal);
 
     //* simple pixmap
     QPixmap pixmap(const Key &key) const
     {
         return pixmap(key, key.active);
     }
 
     //* simple pixmap, with opacity
     QPixmap animatedPixmap(const Key &, qreal opacity);
 
 private:
     Helper &helper(void) const
     {
         return _helper;
     }
 
     //* simple pixmap
     QPixmap pixmap(const Key &, bool active) const;
 
     //* draw gradient into rect
     /*! a separate method is used in order to properly account for corners */
     void renderGradient(QPainter &, const QRectF &, const QRadialGradient &, bool hasBorder = true) const;
 
     //* helper
     Helper &_helper;
 
     //* defines overlap between shadows and body
     enum { overlap = 4 };
 
     //* caching enable state
     bool _enabled;
 
     //* shadow size
     int _activeShadowSize;
 
     //* shadow size
     int _inactiveShadowSize;
 
     //* max index
     /*! it is used to set caches max cost, and calculate animation opacity */
     int _maxIndex;
 
     //* cache
     using TileSetCache = QCache<int, TileSet>;
 
     //* shadow cache
     TileSetCache _shadowCache;
 
     //* animated shadow cache
     TileSetCache _animatedShadowCache;
 };
 }
 
 #endif