#pragma  once
#include "OGLRenderer.h"

#define  SHADER_VERTEX   0
#define  SHADER_FRAGMENT 1
#define  SHADER_GEOMETRY 2

using  namespace  std;

class  Shader {
 public:
     Shader(string  vertex, string  fragment, string  geometry = "");
     ~Shader(void);

     GLuint    GetProgram() { return  program; }
     bool      LinkProgram();

	 GLuint  GetShaderProgram() const { return program; }

	 bool UsingDefaultShader() const {
		 return usingBackupShader;
	 }

 protected:
     void      SetDefaultAttributes();
     bool      LoadShaderFile(string  from, string &into);
     GLuint    GenerateShader(string  from, GLenum  type);


     GLuint    objects[3];
     GLuint    program;

     bool      loadFailed;
	 bool usingBackupShader;
};