利用glut和glew查看openGL的版本以及支持扩展的信息等

测试代码如下

#include "gl/glew.h"
#include "gl/freeglut.h"

#include 

using namespace std;  

int main(int argc, char *argv[])  
{  
    glutInit(&argc, argv);
    glutCreateWindow("GLEW Test");//get an openGL context  

    GLenum err = glewInit();  
    if (err != GLEW_OK )  
    {  
        fprintf(stderr, "Error: %s\n", glewGetErrorString(err));  
        exit (-2);  

    }

    //openGL生产商及版本
    const char* vendorName = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
    const char* version = reinterpret_cast<const char*>(glGetString(GL_VERSION));

    //是否支持某个扩展
    bool isSupport = glewIsSupported("GL_EXT_framebuffer_object");  //是否支持帧缓冲

    int NumberOfExtensions;  
    glGetIntegerv(GL_NUM_EXTENSIONS, &NumberOfExtensions);  
    for(int i=0; iconst GLubyte *ccc=glGetStringi(GL_EXTENSIONS, i);  
        //Now, do something with ccc  
        cout << ccc << endl;  
    }  

    system("pause"); 

    return 0;
}