shader_program.h

Go to the documentation of this file.

/*
 This file is part of the MinGfx Project.
 
 Copyright (c) 2017,2018 Regents of the University of Minnesota.
 All Rights Reserved.
 
 Original Author(s) of this File:
    Dan Keefe, 2018, University of Minnesota
    
 Author(s) of Significant Updates/Modifications to the File:
    ...
 */
 
#ifndef SRC_SHADERPROGRAM_H_
#define SRC_SHADERPROGRAM_H_
 
#include "color.h"
#include "matrix4.h"
#include "opengl_headers.h"
#include "point2.h"
#include "point3.h"
#include "texture2d.h"
#include "vector2.h"
#include "vector3.h"
 
#include <string>
#include <map>
 
namespace mingfx {
 
class ShaderProgram {
public:
    ShaderProgram();
    
    virtual ~ShaderProgram();
    
    
    // ---- These should be called during startup (e.g., in InitOpenGL()) ----
    
    bool AddVertexShaderFromFile(const std::string &file);
 
    bool AddVertexShaderFromSource(const std::string &code);
    
    bool AddFragmentShaderFromFile(const std::string &file);
    
    bool AddFragmentShaderFromSource(const std::string &code);
    
    bool LinkProgram();
    
 
    
    // ---- These should be called during rendering (e.g., in DrawUsingOpenGL()) ----
 
    void UseProgram();
    
    // Set Uniform Variables in the Shader
    
    // MinGfx types
    
    void SetUniform(const std::string &name, const Point2 &p);
 
    void SetUniform(const std::string &name, const Vector2 &v);
 
    void SetUniform(const std::string &name, const Point3 &p);
 
    void SetUniform(const std::string &name, const Vector3 &v);
 
    void SetUniform(const std::string &name, const Matrix4 &m);
    
    void SetUniform(const std::string &name, const Color &c);
    
    
    // built-in types
    
    void SetUniform(const std::string &name, int i);
 
    void SetUniform(const std::string &name, unsigned int ui);
    
    void SetUniform(const std::string &name, float f);
 
    
    // built-in types (arrays)
    
    void SetUniformArray1(const std::string &name, int *i, int count);
 
    void SetUniformArray1(const std::string &name, unsigned int *ui, int count);
 
    void SetUniformArray1(const std::string &name, float *f, int count);
 
    
    void SetUniformArray2(const std::string &name, int *i, int count);
 
    void SetUniformArray2(const std::string &name, unsigned int *ui, int count);
 
    void SetUniformArray2(const std::string &name, float *f, int count);
 
    
    void SetUniformArray3(const std::string &name, int *i, int count);
    
    void SetUniformArray3(const std::string &name, unsigned int *ui, int count);
 
    void SetUniformArray3(const std::string &name, float *f, int count);
 
    
    void SetUniformArray4(const std::string &name, int *i, int count);
    
    void SetUniformArray4(const std::string &name, unsigned int *ui, int count);
    
    void SetUniformArray4(const std::string &name, float *f, int count);
 
    
    // Set Textures (Sampler Variables in the Shader)
    
    void BindTexture(const std::string &name, const Texture2D &tex);
    
    void BindTexture(const std::string &name, const Texture2D &tex, int texUnit);
    
    
    void StopProgram();
 
    bool initialized();
    
private:
    GLuint vertexShader_;
    GLuint fragmentShader_;
    GLuint program_;
    std::map<std::string, int> texBindings_;
};
    
    
} // end namespace
 
#endif