OpenGL程序出现段错误

Question

我正在学习OpenGL，由于某种原因，我绘制三角形的程序无法正常工作。 这是代码：

#include <stdio.h>
#include <stdlib.h>
#include <GL/glew.h>
#include <GL/glfw.h>
#include <glm/glm.hpp>

using namespace glm;

int main()
{
    if(!glfwInit())
    {
        fprintf(stderr, "Failed to initialize GLFW\n");
        return -1;
    }

    glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 4);
    glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3);
    glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 3);
    glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    if(!glfwOpenWindow(1080, 720, 0, 0, 0, 0, 32, 0, GLFW_WINDOW))
    {
        fprintf(stderr, "Failed to open GLFW window\n");
        glfwTerminate();
        return -1;
    }

    if(glewInit() != GLEW_OK)
    {
        fprintf(stderr, "Failed to initialize GLEW\n");
        return -1;
    }

    GLuint VertexArrayID;
    glGenVertexArrays(1, &VertexArrayID);
    glBindVertexArray(VertexArrayID);

    static const GLfloat g_vertex_buffer_data[] = {
        -1.0f, -1.0f, 0.0f,
        1.0f, -1.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
    };

    GLuint vertexBuffer;
    glGenBuffers(1, &vertexBuffer);
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, sizeof(g_vertex_buffer_data), g_vertex_buffer_data, GL_STATIC_DRAW);

    glfwSetWindowTitle("Tutorial 01");

    glfwEnable(GLFW_STICKY_KEYS);

    do
    {
        glEnableVertexAttribArray(0);
        glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
        glVertexAttribPointer(
            0,
            3,
            GL_FLOAT,
            GL_FALSE,
            0,
            (void*)0
        );

        glDrawArrays(GL_TRIANGLES, 0, 3);

        glDisableVertexAttribArray(0);

        glfwSwapBuffers();
    }

    while(glfwGetKey(GLFW_KEY_ESC) != GLFW_PRESS &&
          glfwGetWindowParam(GLFW_OPENED));
}

调试日志：

Debugger name and version: GNU gdb (GDB) 7.5
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:11
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:17
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:18
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:19
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:20
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:22
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:29
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:36
Program received signal SIGSEGV, Segmentation fault.
In ?? () ()
At /home/mike/Programming/OpenGL Tutorials/Opening a window/main.cpp:36
Debugger finished with status 0

Answer 1

在glewInit()之后执行显式版本检查：

if( !GLEW_VERSION_3_3 )
{
    fprintf(stderr, "Insuffcient GL version!\n");
    return -1;
}