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include/cinder/gl/GlslProg.h

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00001 /*
00002  Copyright (c) 2010, The Barbarian Group
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include <string>
00026 #include <sstream>
00027 #include <iostream>
00028 #include <fstream>
00029 #include <exception>
00030 #include <map>
00031 
00032 #include "cinder/gl/gl.h"
00033 #include "cinder/Vector.h"
00034 #include "cinder/Matrix.h"
00035 #include "cinder/DataSource.h"
00036 
00037 namespace cinder { namespace gl {
00038 
00039 class GlslProg {
00040   public: 
00041     GlslProg() {}
00042     GlslProg( DataSourceRef vertexShader, DataSourceRef fragmentShader = DataSourceRef(), DataSourceRef geometryShader = DataSourceRef() );
00043     GlslProg( const char *vertexShader, const char *fragmentShader = 0, const char *geometryShader = 0 );
00044 
00045     void            bind() const;
00046     static void     unbind();
00047 
00048     GLuint          getHandle() const { return mObj->mHandle; }
00049 
00050     void    uniform( const std::string &name, int data );
00051     void    uniform( const std::string &name, const Vec2i &data );
00052     void    uniform( const std::string &name, const int *data, int count );     
00053     void    uniform( const std::string &name, const Vec2i *data, int count );   
00054     void    uniform( const std::string &name, float data );
00055     void    uniform( const std::string &name, const Vec2f &data );
00056     void    uniform( const std::string &name, const Vec3f &data );
00057     void    uniform( const std::string &name, const Vec4f &data );
00058     void    uniform( const std::string &name, const Matrix44f &data, bool transpose = false );  
00059     void    uniform( const std::string &name, const float *data, int count );
00060     void    uniform( const std::string &name, const Vec2f *data, int count );
00061     void    uniform( const std::string &name, const Vec3f *data, int count );
00062     void    uniform( const std::string &name, const Vec4f *data, int count );
00063 
00064     GLint   getUniformLocation( const std::string &name );
00065     GLint   getAttribLocation( const std::string &name );
00066 
00067     std::string     getShaderLog( GLuint handle ) const;
00068 
00069   protected:
00070     void            loadShader( Buffer shaderSourceBuffer, GLint shaderType );
00071     void            loadShader( const char *shaderSource, GLint shaderType );
00072     void            attachShaders();
00073     void            link();
00074 
00075     struct Obj {
00076         Obj() : mHandle( 0 ) {}
00077         ~Obj();
00078         
00079         GLuint                      mHandle;
00080         std::map<std::string,int>   mUniformLocs;
00081     };
00082  
00083     shared_ptr<Obj> mObj;
00084 
00085   public:
00087 
00088     typedef shared_ptr<Obj> GlslProg::*unspecified_bool_type;
00089     operator unspecified_bool_type() const { return ( mObj.get() == 0 ) ? 0 : &GlslProg::mObj; }
00090     void reset() { mObj.reset(); }
00092 };
00093 
00094 class GlslProgCompileExc : public std::exception {
00095  public:    
00096     GlslProgCompileExc( const std::string &log, GLint aShaderType ) throw();
00097     virtual const char* what() const throw()
00098     {
00099         return mMessage;
00100     }
00101 
00102  private:
00103     char    mMessage[16001];
00104     GLint   mShaderType;
00105 };
00106 
00107 class GlslNullProgramExc : public std::exception {
00108  public:    
00109     virtual const char* what() const throw()
00110     {
00111         return "Glsl: Attempt to use null shader";
00112     }
00113 
00114 };
00115 
00116 } } // namespace cinder::gl