PostFX.hpp

00001 
00002 //
00003 // SFML - Simple and Fast Multimedia Library
00004 // Copyright (C) 2007 Laurent Gomila (laurent.gom@gmail.com)
00005 //
00006 // This software is provided 'as-is', without any express or implied warranty.
00007 // In no event will the authors be held liable for any damages arising from the use of this software.
00008 //
00009 // Permission is granted to anyone to use this software for any purpose,
00010 // including commercial applications, and to alter it and redistribute it freely,
00011 // subject to the following restrictions:
00012 //
00013 // 1. The origin of this software must not be misrepresented;
00014 //    you must not claim that you wrote the original software.
00015 //    If you use this software in a product, an acknowledgment
00016 //    in the product documentation would be appreciated but is not required.
00017 //
00018 // 2. Altered source versions must be plainly marked as such,
00019 //    and must not be misrepresented as being the original software.
00020 //
00021 // 3. This notice may not be removed or altered from any source distribution.
00022 //
00024 
00025 #ifndef SFML_POSTFX_HPP
00026 #define SFML_POSTFX_HPP
00027 
00029 // Headers
00031 #include <SFML/Graphics/Drawable.hpp>
00032 #include <SFML/Graphics/Image.hpp>
00033 #include <SFML/Graphics/VideoResource.hpp>
00034 #include <map>
00035 #include <string>
00036 
00037 
00041 class SFML_API sfPostFX : public sfDrawable, public sf_private::sfVideoResource
00042 {
00043 public :
00044 
00049     sfPostFX();
00050 
00057     sfPostFX(const std::string& Filename);
00058 
00065     sfPostFX(const sfPostFX& Copy);
00066 
00071     ~sfPostFX();
00072 
00081     bool LoadFromFile(const std::string& Filename);
00082 
00090     void SetParameter(const std::string& Name, float X);
00091 
00099     void SetParameter(const std::string& Name, float X, float Y);
00100 
00108     void SetParameter(const std::string& Name, float X, float Y, float Z);
00109 
00117     void SetParameter(const std::string& Name, float X, float Y, float Z, float W);
00118 
00126     void SetTexture(const std::string& Name, sfImage* Image);
00127 
00136     sfPostFX& operator =(const sfPostFX& Other);
00137 
00144     static bool CanUsePostFX();
00145 
00146 protected :
00147 
00152     virtual void Render(sfRenderWindow& Window);
00153 
00154 private :
00155 
00165     static std::string PreprocessEffect(const std::string& Filename);
00166 
00176     bool CreateAndAttachShader(const std::string& Source, unsigned int ShaderType);
00177 
00182     void CreateProgram();
00183 
00188     virtual void DestroyVideoResources();
00189 
00191     // Member data
00193     unsigned int                    myShaderProgram;  
00194     std::map<std::string, sfImage*> mySamplers;       
00195     std::string                     myFragmentShader; 
00196     sfImage                         myFrameBuffer;    
00197 };
00198 
00199 
00200 #endif // SFML_POSTFX_HPP