Equalizer  1.4.1
include/eq/fabric/channel.h
00001 
00002 /* Copyright (c) 2010-2011, Stefan Eilemann <eile@equalizergraphics.com>
00003  *                    2010, Cedric Stalder <cedric.stalder@gmail.com> 
00004  *
00005  * This library is free software; you can redistribute it and/or modify it under
00006  * the terms of the GNU Lesser General Public License version 2.1 as published
00007  * by the Free Software Foundation.
00008  *  
00009  * This library is distributed in the hope that it will be useful, but WITHOUT
00010  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00011  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
00012  * details.
00013  * 
00014  * You should have received a copy of the GNU Lesser General Public License
00015  * along with this library; if not, write to the Free Software Foundation, Inc.,
00016  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00017  */
00018 
00019 #ifndef EQFABRIC_CHANNEL_H
00020 #define EQFABRIC_CHANNEL_H
00021 
00022 #include <eq/fabric/object.h>        // base class
00023 #include <eq/fabric/paths.h>
00024 #include <eq/fabric/renderContext.h> // member
00025 #include <eq/fabric/types.h>
00026 #include <eq/fabric/visitorResult.h> // enum
00027 
00028 namespace eq
00029 {
00030 namespace fabric
00031 {
00033     template< class W, class C > class Channel : public Object
00034     {
00035     public: 
00036         typedef LeafVisitor< C > Visitor; 
00037         typedef W Parent; 
00038 
00046         enum Drawable
00047         {
00048             FB_WINDOW   = LB_BIT_NONE, 
00049             FBO_COLOR   = LB_BIT1,     
00050             FBO_DEPTH   = LB_BIT2,     
00051             FBO_STENCIL = LB_BIT3      
00052         };
00053         
00057         void init();
00058 
00060         W* getWindow() { return _window; }
00061 
00063         const W* getWindow() const { return _window; }
00064 
00066         bool isDestination() const
00067             { return _data.nativeContext.view.identifier!=UUID::ZERO;}
00068 
00070         void setViewVersion( const co::ObjectVersion& view );
00071 
00073         const co::ObjectVersion& getViewVersion() const
00074             { return _data.nativeContext.view; }
00075 
00077         void setPixelViewport( const PixelViewport& pvp );
00078 
00080         EQFABRIC_INL void setViewport( const Viewport& vp );
00081 
00083         virtual void notifyViewportChanged();
00084 
00086         const PixelViewport& getNativePixelViewport() const
00087             { return _data.nativeContext.pvp; }
00088 
00090         bool hasFixedViewport() const { return _data.fixedVP; }
00091 
00103         EQFABRIC_INL void setNearFar( const float nearPlane,
00104                                       const float farPlane);
00105 
00110         uint32_t getDrawable() const { return _drawable; }
00111 
00119         EQFABRIC_INL VisitorResult accept( Visitor& visitor );
00120 
00122         EQFABRIC_INL VisitorResult accept( Visitor& visitor ) const;
00123 
00132         EQFABRIC_INL void setCapabilities( const uint64_t bitmask );
00133 
00135         EQFABRIC_INL uint64_t getCapabilities() const;
00136 
00138         EQFABRIC_INL void setMaxSize( const Vector2i& size );
00139 
00140         void setOverdraw( const Vector4i& overdraw ); 
00141         const Vector2i& getMaxSize()  const { return _maxSize; } 
00142 
00144         EQFABRIC_INL ChannelPath getPath() const;
00145 
00146         EQFABRIC_INL virtual void backup(); 
00147         EQFABRIC_INL virtual void restore(); 
00148 
00149 
00161         uint32_t getDrawBuffer() const { return _context->buffer; }
00162 
00164         uint32_t getReadBuffer() const { return _context->buffer; }
00165 
00167         const ColorMask& getDrawBufferMask() const
00168             { return _context->bufferMask; }
00169 
00174         const PixelViewport& getPixelViewport() const { return _context->pvp; }
00175 
00184         virtual bool useOrtho() const { return false; }
00185 
00190         const Frustumf& getFrustum() const
00191             { return useOrtho() ? getOrtho() : getPerspective(); }
00192 
00197         const Frustumf& getPerspective() const { return _context->frustum; }
00198 
00203         const Frustumf& getOrtho() const { return _context->ortho; }
00204 
00214         const Matrix4f& getHeadTransform() const
00215         { return useOrtho() ? getOrthoTransform() : getPerspectiveTransform(); }
00216 
00226         const Matrix4f& getPerspectiveTransform() const
00227             { return _context->headTransform; }
00228 
00238         const Matrix4f& getOrthoTransform() const
00239             { return _context->orthoTransform; }
00240 
00245         const Viewport& getViewport() const { return _context->vp; }
00246 
00251         const Range& getRange() const { return _context->range; }
00252 
00257         const Pixel& getPixel() const { return _context->pixel; }
00258 
00263         const SubPixel& getSubPixel() const { return _context->subpixel; }
00264 
00269         const Zoom& getZoom() const { return _context->zoom; }
00270 
00275         uint32_t getPeriod() const { return _context->period; }
00276 
00281         uint32_t getPhase() const { return _context->phase; }
00282 
00293         const Vector2i& getPixelOffset() const { return _context->offset; }
00294 
00296         Eye getEye() const { return _context->eye; }
00297 
00299         const Vector4i& getOverdraw() const { return _context->overdraw; }
00300 
00302         uint32_t getTaskID() const { return _context->taskID; }
00304 
00307         // Note: also update string array initialization in channel.cpp
00309         enum IAttribute
00310         {
00312             IATTR_HINT_STATISTICS,
00314             IATTR_HINT_SENDTOKEN,
00315             IATTR_LAST,
00316             IATTR_ALL = IATTR_LAST + 5
00317         };
00318         
00320         EQFABRIC_INL int32_t getIAttribute( const IAttribute attr ) const;
00322         EQFABRIC_INL static const std::string& getIAttributeString(
00323                                                         const IAttribute attr );
00325 
00326         virtual bool omitOutput() const { return false; } 
00327         virtual void output( std::ostream& ) const {} 
00328         
00329     protected:
00331         EQFABRIC_INL Channel( W* parent );
00332 
00334         Channel( const Channel& from );
00335 
00337         EQFABRIC_INL virtual ~Channel();
00338 
00340         EQFABRIC_INL virtual void serialize( co::DataOStream& os,
00341                                                 const uint64_t dirtyBits );
00343         EQFABRIC_INL virtual void deserialize( co::DataIStream& is, 
00344                                                   const uint64_t dirtyBits );
00345 
00347         EQFABRIC_INL virtual void setDirty( const uint64_t bits );
00348 
00349         void setDrawable( const uint32_t drawable ); 
00350 
00354         void overrideContext( RenderContext& context ) { _context = &context; }
00355 
00357         void resetRenderContext() { _context = &_data.nativeContext; }
00358 
00360         const RenderContext& getContext() const { return *_context; }
00361 
00363         const RenderContext& getNativeContext() const
00364             { return _data.nativeContext; }
00366 
00368         void setIAttribute( const IAttribute attr, const int32_t value )
00369             { _iAttributes[attr] = value; setDirty( DIRTY_ATTRIBUTES ); }
00370 
00372         virtual ChangeType getChangeType() const { return UNBUFFERED; }
00373 
00374         enum DirtyBits
00375         {
00376             DIRTY_ATTRIBUTES    = Object::DIRTY_CUSTOM << 0, //   64
00377             DIRTY_VIEWPORT      = Object::DIRTY_CUSTOM << 1, //  128
00378             DIRTY_MEMBER        = Object::DIRTY_CUSTOM << 2, //  256
00379             DIRTY_FRUSTUM       = Object::DIRTY_CUSTOM << 3, //  512
00380             DIRTY_CAPABILITIES  = Object::DIRTY_CUSTOM << 4, // 1024
00381             DIRTY_CHANNEL_BITS = 
00382                DIRTY_ATTRIBUTES | DIRTY_VIEWPORT | DIRTY_MEMBER |
00383                DIRTY_FRUSTUM | DIRTY_OBJECT_BITS
00384         };
00385 
00387         virtual uint64_t getRedistributableBits() const
00388             { return DIRTY_CHANNEL_BITS; }
00389 
00390         virtual void updateCapabilities() {}; 
00391 
00392     private:
00394         W* const _window;
00395 
00396         struct BackupData
00397         {
00398             BackupData() : capabilities( LB_BIT_ALL_64 ), fixedVP( true ) {}
00399 
00401             RenderContext nativeContext;
00402 
00404             uint64_t capabilities;
00405 
00407             bool fixedVP;
00408         }
00409             _data, _backup;
00410 
00412         RenderContext* _context;
00413 
00415         int32_t _iAttributes[IATTR_ALL];
00416 
00418         uint32_t _drawable;
00419 
00421         Vector2i    _maxSize;
00422 
00423         struct Private;
00424         Private* _private; // placeholder for binary-compatible changes
00425     };
00426 
00427     template< class W, class C > EQFABRIC_INL
00428     std::ostream& operator << ( std::ostream&, const Channel< W, C >& );
00429 }
00430 }
00431 
00432 #endif // EQFABRIC_CHANNEL_H
00433 
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