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77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
// Created on: 2011-08-05
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// Created by: Sergey ZERCHANINOV
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// Copyright (c) 2011-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef OpenGl_Element_Header
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#define OpenGl_Element_Header
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#include <OpenGl_RenderFilter.hxx>
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#include <Standard_Type.hxx>
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class OpenGl_Workspace;
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class OpenGl_Context;
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//! Base interface for drawable elements.
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class OpenGl_Element
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{
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public:
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Standard_EXPORT OpenGl_Element();
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virtual void Render (const Handle(OpenGl_Workspace)& theWorkspace) const = 0;
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//! Release GPU resources.
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//! Pointer to the context is used because this method might be called
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//! when the context is already being destroyed and usage of a handle
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//! would be unsafe
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virtual void Release (OpenGl_Context* theContext) = 0;
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//! Pointer to the context is used because this method might be called
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//! when the context is already being destroyed and usage of a handle
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//! would be unsafe
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template <typename theResource_t>
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static void Destroy (OpenGl_Context* theContext,
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theResource_t*& theElement)
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{
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if (theElement == NULL)
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{
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return;
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}
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theElement->Release (theContext);
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OpenGl_Element* anElement = theElement;
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delete anElement;
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theElement = NULL;
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}
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public:
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//! Return TRUE if primitive type generates shaded triangulation (to be used in filters).
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virtual Standard_Boolean IsFillDrawMode() const { return false; }
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//! Update parameters of the drawable elements.
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virtual void SynchronizeAspects() {}
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protected:
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Standard_EXPORT virtual ~OpenGl_Element();
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public:
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DEFINE_STANDARD_ALLOC
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};
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#endif // OpenGl_Element_Header
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