// ---------------------------------------------------------------------------------//
// Copyright (c) 2013, Regents of the University of Pennsylvania                    //
// All rights reserved.                                                             //
//                                                                                  //
// Redistribution and use in source and binary forms, with or without               //
// modification, are permitted provided that the following conditions are met:      //
//     * Redistributions of source code must retain the above copyright             //
//       notice, this list of conditions and the following disclaimer.              //
//     * Redistributions in binary form must reproduce the above copyright          //
//       notice, this list of conditions and the following disclaimer in the        //
//       documentation and/or other materials provided with the distribution.       //
//     * Neither the name of the <organization> nor the                             //
//       names of its contributors may be used to endorse or promote products       //
//       derived from this software without specific prior written permission.      //
//                                                                                  //
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND  //
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED    //
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE           //
// DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY               //
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES       //
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;     //
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND      //
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT       //
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS    //
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                     //
//                                                                                  //
// Contact Tiantian Liu (ltt1598@gmail.com) if you have any questions.              //
//----------------------------------------------------------------------------------//

#ifndef _GLSL_WRAPPER_H_
#define _GLSL_WRAPPER_H_

#include "headers\global_headers.h"
#include "headers\opengl_headers.h"
#include "headers\math_headers.h"
#include "camera.h"

class RenderWrapper
{
public:
	RenderWrapper(void);
	virtual ~RenderWrapper(void);

	void InitShader(const char* vert_path, const char* frag_path);
	bool InitTexture(const char* tex_path);
	void CleanupShader();

	void SetCameraProjection(glm::mat4 projection);
	void SetCameraModelview(glm::mat4 modelview);

	void ActivateShaderprog();
	void DeactivateShaderprog();

	void DisableUserMode();
	void EnableUserMode();
	
public: // inlines
	inline VBO& getVBO() {return m_vbo_handle;}

private: 
	VBO m_vbo_handle;
	GLuint m_vert_handle, m_frag_handle, m_shaderprog_handle;
	GLuint m_texture;

private: // private methods

	//helper function to read shader source and put it in a char array
	//thanks to Swiftless
	char* textFileRead(const char*);

	//some other helper functions from CIS 565
	void printLinkInfoLog(int);
	void printShaderInfoLog(int);
};

#endif