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WGEShaderCodeInjector.h
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//---------------------------------------------------------------------------
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//
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// Project: OpenWalnut ( http://www.openwalnut.org )
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//
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// Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
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// For more information see http://www.openwalnut.org/copying
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//
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// This file is part of OpenWalnut.
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//
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// OpenWalnut is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// OpenWalnut is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
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//
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//---------------------------------------------------------------------------
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#ifndef WGESHADERCODEINJECTOR_H
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#define WGESHADERCODEINJECTOR_H
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#include <string>
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#include "WGEShaderPreprocessor.h"
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/**
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* This preprocessor is able to inject code into a shader. It therefore replaces a specified keyword with code.
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*/
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class
WGEShaderCodeInjector
:
public
WGEShaderPreprocessor
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{
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public
:
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/**
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* Shortcut for a shared_ptr.
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*/
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typedef
boost::shared_ptr< WGEShaderCodeInjector >
SPtr
;
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/**
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* Shortcut for a const shared_ptr.
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*/
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typedef
boost::shared_ptr< WGEShaderCodeInjector >
ConstSPtr
;
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/**
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* Default constructor.
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*
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* \param keyword this is replaced by the custom code if existing.
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*/
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explicit
WGEShaderCodeInjector
( std::string keyword );
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/**
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* Destructor.
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*/
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virtual
~WGEShaderCodeInjector
();
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/**
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* Process the whole code. It is not allowed to modify some internal state in this function because it might be called by several shaders.
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*
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* \param code the code to process
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* \param file the filename of the shader currently processed. Should be used for debugging output.
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*
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* \return the resulting new code
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*/
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virtual
std::string
process
(
const
std::string& file,
const
std::string& code )
const
;
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/**
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* Define the code that replaces the keyword.
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*
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* \param code the code.
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*/
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void
setCode
( std::string code );
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protected
:
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private
:
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/**
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* the custom code.
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*/
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std::string
m_code
;
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/**
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* What to replace.
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*/
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std::string
m_keyword
;
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};
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#endif // WGESHADERCODEINJECTOR_H
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