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413 lines
10 KiB
413 lines
10 KiB
/////////////////////////////////////////////////////////////////////////// |
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// |
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// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas |
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// Digital Ltd. LLC |
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// |
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// All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Industrial Light & Magic nor the names of |
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// its contributors may be used to endorse or promote products derived |
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// from this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// |
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/////////////////////////////////////////////////////////////////////////// |
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#ifndef INCLUDED_IMF_ATTRIBUTE_H |
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#define INCLUDED_IMF_ATTRIBUTE_H |
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//----------------------------------------------------------------------------- |
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// |
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// class Attribute |
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// |
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//----------------------------------------------------------------------------- |
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#include "IexBaseExc.h" |
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#include "ImfIO.h" |
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#include "ImfXdr.h" |
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#include "ImfForward.h" |
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#include "ImfExport.h" |
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#include "ImfNamespace.h" |
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OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER |
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class Attribute |
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{ |
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public: |
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//--------------------------- |
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// Constructor and destructor |
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//--------------------------- |
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IMF_EXPORT |
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Attribute (); |
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IMF_EXPORT |
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virtual ~Attribute (); |
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//------------------------------- |
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// Get this attribute's type name |
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//------------------------------- |
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virtual const char * typeName () const = 0; |
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//------------------------------ |
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// Make a copy of this attribute |
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//------------------------------ |
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virtual Attribute * copy () const = 0; |
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//---------------------------------------- |
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// Type-specific attribute I/O and copying |
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//---------------------------------------- |
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virtual void writeValueTo (OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os, |
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int version) const = 0; |
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virtual void readValueFrom (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is, |
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int size, |
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int version) = 0; |
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virtual void copyValueFrom (const Attribute &other) = 0; |
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//------------------ |
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// Attribute factory |
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//------------------ |
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IMF_EXPORT |
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static Attribute * newAttribute (const char typeName[]); |
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//----------------------------------------------------------- |
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// Test if a given attribute type has already been registered |
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//----------------------------------------------------------- |
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IMF_EXPORT |
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static bool knownType (const char typeName[]); |
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protected: |
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//-------------------------------------------------- |
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// Register an attribute type so that newAttribute() |
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// knows how to make objects of this type. |
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//-------------------------------------------------- |
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IMF_EXPORT |
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static void registerAttributeType (const char typeName[], |
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Attribute *(*newAttribute)()); |
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//------------------------------------------------------ |
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// Un-register an attribute type so that newAttribute() |
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// no longer knows how to make objects of this type (for |
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// debugging only). |
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//------------------------------------------------------ |
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IMF_EXPORT |
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static void unRegisterAttributeType (const char typeName[]); |
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}; |
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//------------------------------------------------- |
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// Class template for attributes of a specific type |
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//------------------------------------------------- |
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template <class T> |
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class TypedAttribute: public Attribute |
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{ |
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public: |
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//---------------------------- |
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// Constructors and destructor |
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//------------_--------------- |
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TypedAttribute (); |
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TypedAttribute (const T &value); |
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TypedAttribute (const TypedAttribute<T> &other); |
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virtual ~TypedAttribute (); |
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//-------------------------------- |
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// Access to the attribute's value |
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//-------------------------------- |
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T & value (); |
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const T & value () const; |
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//-------------------------------- |
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// Get this attribute's type name. |
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//-------------------------------- |
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virtual const char * typeName () const; |
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//--------------------------------------------------------- |
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// Static version of typeName() |
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// This function must be specialized for each value type T. |
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//--------------------------------------------------------- |
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static const char * staticTypeName (); |
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//--------------------- |
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// Make a new attribute |
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//--------------------- |
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static Attribute * makeNewAttribute (); |
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//------------------------------ |
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// Make a copy of this attribute |
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//------------------------------ |
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virtual Attribute * copy () const; |
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//----------------------------------------------------------------- |
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// Type-specific attribute I/O and copying. |
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// Depending on type T, these functions may have to be specialized. |
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//----------------------------------------------------------------- |
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virtual void writeValueTo (OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os, |
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int version) const; |
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virtual void readValueFrom (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is, |
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int size, |
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int version); |
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virtual void copyValueFrom (const Attribute &other); |
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//------------------------------------------------------------ |
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// Dynamic casts that throw exceptions instead of returning 0. |
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//------------------------------------------------------------ |
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static TypedAttribute * cast (Attribute *attribute); |
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static const TypedAttribute * cast (const Attribute *attribute); |
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static TypedAttribute & cast (Attribute &attribute); |
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static const TypedAttribute & cast (const Attribute &attribute); |
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//--------------------------------------------------------------- |
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// Register this attribute type so that Attribute::newAttribute() |
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// knows how to make objects of this type. |
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// |
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// Note that this function is not thread-safe because it modifies |
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// a global variable in the IlmIlm library. A thread in a multi- |
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// threaded program may call registerAttributeType() only when no |
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// other thread is accessing any functions or classes in the |
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// IlmImf library. |
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// |
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//--------------------------------------------------------------- |
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static void registerAttributeType (); |
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//----------------------------------------------------- |
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// Un-register this attribute type (for debugging only) |
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//----------------------------------------------------- |
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static void unRegisterAttributeType (); |
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private: |
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T _value; |
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}; |
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//------------------------------------ |
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// Implementation of TypedAttribute<T> |
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//------------------------------------ |
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template <class T> |
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TypedAttribute<T>::TypedAttribute (): |
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Attribute (), |
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_value (T()) |
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{ |
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// empty |
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} |
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template <class T> |
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TypedAttribute<T>::TypedAttribute (const T & value): |
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Attribute (), |
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_value (value) |
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{ |
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// empty |
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} |
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template <class T> |
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TypedAttribute<T>::TypedAttribute (const TypedAttribute<T> &other): |
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Attribute (other), |
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_value () |
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{ |
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copyValueFrom (other); |
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} |
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template <class T> |
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TypedAttribute<T>::~TypedAttribute () |
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{ |
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// empty |
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} |
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template <class T> |
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inline T & |
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TypedAttribute<T>::value () |
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{ |
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return _value; |
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} |
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template <class T> |
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inline const T & |
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TypedAttribute<T>::value () const |
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{ |
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return _value; |
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} |
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template <class T> |
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const char * |
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TypedAttribute<T>::typeName () const |
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{ |
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return staticTypeName(); |
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} |
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template <class T> |
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Attribute * |
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TypedAttribute<T>::makeNewAttribute () |
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{ |
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return new TypedAttribute<T>(); |
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} |
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template <class T> |
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Attribute * |
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TypedAttribute<T>::copy () const |
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{ |
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Attribute * attribute = new TypedAttribute<T>(); |
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attribute->copyValueFrom (*this); |
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return attribute; |
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} |
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template <class T> |
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void |
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TypedAttribute<T>::writeValueTo (OPENEXR_IMF_INTERNAL_NAMESPACE::OStream &os, |
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int version) const |
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{ |
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OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::write <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (os, _value); |
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} |
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template <class T> |
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void |
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TypedAttribute<T>::readValueFrom (OPENEXR_IMF_INTERNAL_NAMESPACE::IStream &is, |
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int size, |
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int version) |
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{ |
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OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, _value); |
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} |
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template <class T> |
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void |
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TypedAttribute<T>::copyValueFrom (const Attribute &other) |
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{ |
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_value = cast(other)._value; |
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} |
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template <class T> |
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TypedAttribute<T> * |
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TypedAttribute<T>::cast (Attribute *attribute) |
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{ |
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TypedAttribute<T> *t = |
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dynamic_cast <TypedAttribute<T> *> (attribute); |
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if (t == 0) |
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throw IEX_NAMESPACE::TypeExc ("Unexpected attribute type."); |
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return t; |
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} |
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template <class T> |
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const TypedAttribute<T> * |
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TypedAttribute<T>::cast (const Attribute *attribute) |
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{ |
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const TypedAttribute<T> *t = |
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dynamic_cast <const TypedAttribute<T> *> (attribute); |
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if (t == 0) |
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throw IEX_NAMESPACE::TypeExc ("Unexpected attribute type."); |
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return t; |
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} |
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template <class T> |
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inline TypedAttribute<T> & |
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TypedAttribute<T>::cast (Attribute &attribute) |
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{ |
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return *cast (&attribute); |
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} |
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template <class T> |
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inline const TypedAttribute<T> & |
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TypedAttribute<T>::cast (const Attribute &attribute) |
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{ |
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return *cast (&attribute); |
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} |
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template <class T> |
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inline void |
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TypedAttribute<T>::registerAttributeType () |
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{ |
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Attribute::registerAttributeType (staticTypeName(), makeNewAttribute); |
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} |
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template <class T> |
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inline void |
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TypedAttribute<T>::unRegisterAttributeType () |
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{ |
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Attribute::unRegisterAttributeType (staticTypeName()); |
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} |
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OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT |
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#endif
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