gl 调用以 EXC_BAC_ACCESS 结束 - 错误的 opengl 上下文？

发布于 2024-09-27 16:07:52 字数 887 浏览 1 评论 0原文

我有以下程序

void allocVars(){
    m_window = new GLWindow(); //glGenTexture() is called //CRASH!
    m_window->Init(m_cam.w, m_cam.h, "Window Name"); 

}
void glInit()
{
    glutReshapeFunc(reshape);
    glutIdleFunc(idle);
    glutKeyboardFunc(keyboard);
    glutMouseFunc(mouse);
    glutDisplayFunc(display);

    glBlendFunc(GL_SRC_ALPHA, GL_ONE); //CRASH!
}

int main(int argc, char **argv)
{
    glutInit(&argc, argv);

    glInit(); // CRASH HERE
    camInit(); //ok
    allocVars(); // CRASH HERE

    trackingInit();

    glutMainLoop();


    return 0;

}

根据其他帖子，为了进行 gl 调用，我必须首先有一个有效的 openGL 上下文。（由于 Windows 中的奇怪原因，即使上下文尚未有效，它也能工作。）这就是为什么我将所有内容移到 glutInit 和 glInit 函数之后，但该应用程序总是在 gl 函数中崩溃，例如 allocVars() 内的 glGenTextures() ；在 GLWindow() 中；或在 glInit() 内部的 glBlendFunc()

我想知道我在这里缺少什么和/或如何检查我是否有一个有效的 opengl 上下文？

提前致谢

原文

I have the following program

void allocVars(){
    m_window = new GLWindow(); //glGenTexture() is called //CRASH!
    m_window->Init(m_cam.w, m_cam.h, "Window Name"); 

}
void glInit()
{
    glutReshapeFunc(reshape);
    glutIdleFunc(idle);
    glutKeyboardFunc(keyboard);
    glutMouseFunc(mouse);
    glutDisplayFunc(display);

    glBlendFunc(GL_SRC_ALPHA, GL_ONE); //CRASH!
}

int main(int argc, char **argv)
{
    glutInit(&argc, argv);

    glInit(); // CRASH HERE
    camInit(); //ok
    allocVars(); // CRASH HERE

    trackingInit();

    glutMainLoop();


    return 0;

}

Acccording to other posts, in order to make gl calls I have to have a valid openGL context first. (For strange reasons in Windows it works even if the context is not valid yet.)
That is why I move everything after glutInit and glInit functions but this application always crashes in gl functions like
glGenTextures() inside of allocVars(); in GLWindow(); or in
glBlendFunc() inside of glInit()

I wonder what am I missing here and/or how can I check I have a valid opengl context?

Thanks in advance

分享到QQ

分享到微博