Equalizer  1.4.1
fabric/observer.h
00001 
00002 /* Copyright (c) 2009-2011, Stefan Eilemann <eile@equalizergraphics.com> 
00003  *
00004  * This library is free software; you can redistribute it and/or modify it under
00005  * the terms of the GNU Lesser General Public License version 2.1 as published
00006  * by the Free Software Foundation.
00007  *  
00008  * This library is distributed in the hope that it will be useful, but WITHOUT
00009  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00010  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
00011  * details.
00012  * 
00013  * You should have received a copy of the GNU Lesser General Public License
00014  * along with this library; if not, write to the Free Software Foundation, Inc.,
00015  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00016  */
00017 
00018 #ifndef EQFABRIC_OBSERVER_H
00019 #define EQFABRIC_OBSERVER_H
00020 
00021 #include <eq/fabric/api.h>
00022 #include <eq/fabric/focusMode.h>     // enum
00023 #include <eq/fabric/object.h>        // base class
00024 #include <eq/fabric/types.h>
00025 #include <eq/fabric/visitorResult.h> // enum
00026 
00027 #include <string>
00028 #include <vector>
00029 
00030 namespace eq
00031 {
00032 namespace fabric
00033 {
00035     template< class C, class O > class Observer : public Object
00036     {
00037     public:
00039         typedef LeafVisitor< O > Visitor;
00040 
00055         EQFABRIC_INL void setHeadMatrix( const Matrix4f& matrix );
00056 
00058         const Matrix4f& getHeadMatrix() const { return _data.headMatrix; }
00059 
00061         EQFABRIC_INL void setEyeBase( const float eyeBase );
00062 
00064         float getEyeBase() const { return _data.eyeBase; }
00065 
00067         EQFABRIC_INL void setFocusDistance( const float focusDistance );
00068 
00070         float getFocusDistance() const { return _data.focusDistance; }
00071 
00073         EQFABRIC_INL void setFocusMode( const FocusMode focusMode );
00074 
00076         FocusMode getFocusMode() const { return _data.focusMode; }
00077 
00079         const C* getConfig() const { return _config; }
00080 
00082         C* getConfig() { return _config; }
00083 
00085         ObserverPath getPath() const;
00087 
00097         EQFABRIC_INL VisitorResult accept( Visitor& visitor );
00098 
00100         EQFABRIC_INL VisitorResult accept( Visitor& visitor ) const;
00101 
00102         virtual void backup(); 
00103         virtual void restore(); 
00104 
00105         
00106     protected:
00108         EQFABRIC_INL Observer( C* config );
00109 
00111         EQFABRIC_INL virtual ~Observer();
00112 
00114         virtual void serialize( co::DataOStream& os,
00115                                 const uint64_t dirtyBits );
00117         virtual void deserialize( co::DataIStream& is,
00118                                   const uint64_t dirtyBits );
00119         virtual void setDirty( const uint64_t bits ); 
00120 
00122         enum DirtyBits
00123         {
00124             DIRTY_EYE_BASE   = Object::DIRTY_CUSTOM << 0,
00125             DIRTY_HEAD       = Object::DIRTY_CUSTOM << 1,
00126             DIRTY_FOCUS      = Object::DIRTY_CUSTOM << 2,
00127             DIRTY_OBSERVER_BITS =
00128                 DIRTY_EYE_BASE | DIRTY_HEAD | DIRTY_FOCUS | DIRTY_OBJECT_BITS
00129         };
00130 
00132         virtual uint64_t getRedistributableBits() const
00133             { return DIRTY_OBSERVER_BITS; }
00134 
00135     private:
00137         C* const _config;
00138 
00139         struct BackupData
00140         {
00141             BackupData();
00142 
00144             float eyeBase;
00145 
00147             float focusDistance;
00148 
00150             FocusMode focusMode;
00151 
00153             Matrix4f headMatrix;
00154         }
00155             _data, _backup;
00156 
00157         struct Private;
00158         Private* _private; // placeholder for binary-compatible changes
00159     };
00160 
00161     template< class C, class O >
00162     EQFABRIC_INL std::ostream& operator << ( std::ostream&,
00163                                              const Observer< C, O >& );
00164 }
00165 }
00166 #endif // EQFABRIC_OBSERVER_H
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