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d5f74e42d6
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast Wrong license statements corrected in several files. Copyright and license statements added in XSD and GLSL files. Copyright year updated in some files. Obsolete documentation files removed from DrawResources.
121 lines
4.3 KiB
C++
Executable File
121 lines
4.3 KiB
C++
Executable File
// Created on: 2013-09-20
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// Created by: Denis BOGOLEPOV
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// Copyright (c) 2013-2014 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 _Graphic3d_ShaderProgram_HeaderFile
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#define _Graphic3d_ShaderProgram_HeaderFile
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#include <Graphic3d_ShaderObject_Handle.hxx>
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#include <Graphic3d_ShaderProgram_Handle.hxx>
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#include <Graphic3d_ShaderVariable.hxx>
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#include <NCollection_Sequence.hxx>
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//! List of shader objects.
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typedef NCollection_Sequence<Handle(Graphic3d_ShaderObject)> Graphic3d_ShaderObjectList;
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//! List of custom uniform shader variables.
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typedef NCollection_Sequence<Handle(Graphic3d_ShaderVariable)> Graphic3d_ShaderVariableList;
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//! This class is responsible for managing shader programs.
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class Graphic3d_ShaderProgram : public Standard_Transient
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{
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public:
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//! The list of built-in GLSL programs
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enum ShaderName
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{
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ShaderName_UNKNOWN, //!< undefined program
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ShaderName_Phong //!< per-pixel lighting (Phong shading)
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};
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public:
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//! Creates new empty program object.
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Standard_EXPORT Graphic3d_ShaderProgram();
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//! Creates program object from pre-defined shaders.
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//! Raises Standard_Failure exception if shader resources are unavailable.
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Standard_EXPORT Graphic3d_ShaderProgram (const Graphic3d_ShaderProgram::ShaderName theName);
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//! Releases resources of program object.
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Standard_EXPORT virtual ~Graphic3d_ShaderProgram();
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//! Releases resources of program object.
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Standard_EXPORT void Destroy() const;
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//! Checks if the program object is valid or not.
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Standard_EXPORT virtual Standard_Boolean IsDone() const;
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//! Returns unique ID used to manage resource in graphic driver.
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const TCollection_AsciiString& GetId() const { return myID; }
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//! Attaches shader object to the program object.
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Standard_EXPORT Standard_Boolean AttachShader (const Handle(Graphic3d_ShaderObject)& theShader);
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//! Detaches shader object from the program object.
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Standard_EXPORT Standard_Boolean DetachShader (const Handle(Graphic3d_ShaderObject)& theShader);
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//! Returns list of attached shader objects.
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const Graphic3d_ShaderObjectList& ShaderObjects() const { return myShaderObjects; }
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//! Returns list of custom uniform variables.
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const Graphic3d_ShaderVariableList& Variables() const { return myVariables; }
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//! Pushes custom uniform variable to the program.
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template<class T>
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Standard_Boolean PushVariable (const TCollection_AsciiString& theName,
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const T& theValue);
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//! Removes all custom uniform variables from the program.
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Standard_EXPORT void ClearVariables();
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public:
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//! The path to GLSL programs determined from CSF_ShadersDirectory or CASROOT environment variables.
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//! @return the root folder with default GLSL programs.
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Standard_EXPORT static const TCollection_AsciiString& ShadersFolder();
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public:
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DEFINE_STANDARD_RTTI (Graphic3d_ShaderProgram)
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private:
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TCollection_AsciiString myID; //!< The unique identifier of program object.
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Graphic3d_ShaderObjectList myShaderObjects; //!< the list of attached shader objects.
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Graphic3d_ShaderVariableList myVariables; //!< the list of custom uniform variables.
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};
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// =======================================================================
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// function : PushVariable
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// purpose : Pushes custom uniform variable to the program
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// =======================================================================
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template<class T> inline
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Standard_Boolean Graphic3d_ShaderProgram::PushVariable (const TCollection_AsciiString& theName,
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const T& theValue)
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{
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Handle(Graphic3d_ShaderVariable) aVariable = Graphic3d_ShaderVariable::Create (theName, theValue);
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if (aVariable.IsNull() || !aVariable->IsDone())
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{
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return Standard_False;
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}
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myVariables.Append (aVariable);
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return Standard_True;
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}
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#endif
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