PostFX.hpp

00001 
00002 //
00003 // SFML - Simple and Fast Multimedia Library
00004 // Copyright (C) 2007-2008 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 <istream>
00035 #include <map>
00036 #include <string>
00037 
00038 
00039 namespace sf
00040 {
00044 class SFML_API PostFX : public Drawable, public VideoResource
00045 {
00046 public :
00047 
00052     PostFX();
00053 
00060     PostFX(const PostFX& Copy);
00061 
00066     ~PostFX();
00067 
00076     bool LoadFromFile(const std::string& Filename);
00077 
00086     bool LoadFromMemory(const std::string& Effect);
00087 
00095     void SetParameter(const std::string& Name, float X);
00096 
00104     void SetParameter(const std::string& Name, float X, float Y);
00105 
00113     void SetParameter(const std::string& Name, float X, float Y, float Z);
00114 
00122     void SetParameter(const std::string& Name, float X, float Y, float Z, float W);
00123 
00131     void SetTexture(const std::string& Name, Image* Texture);
00132 
00141     PostFX& operator =(const PostFX& Other);
00142 
00149     static bool CanUsePostFX();
00150 
00151 protected :
00152 
00157     virtual void Render(const RenderWindow& Window) const;
00158 
00159 private :
00160 
00170     static std::string PreprocessEffect(std::istream& File);
00171 
00176     void CreateProgram();
00177 
00182     virtual void DestroyVideoResources();
00183 
00185     // Member data
00187     unsigned int                  myShaderProgram;  
00188     std::map<std::string, Image*> mySamplers;       
00189     std::string                   myFragmentShader; 
00190     mutable Image                 myFrameBuffer;    
00191 };
00192 
00193 } // namespace sf
00194 
00195 
00196 #endif // SFML_POSTFX_HPP