奇怪的 OpenGL 块

Question

我遇到一个问题，上面的代码间歇性地运行不正确。在大多数运行中，它将正确打印“成功初始化 OpenGL 设备”。但是，有时我只得到“L”成功初始化 GLEW。”然后应用程序停止/挂起/死锁。我不明白是什么导致了这种情况，是否有任何 OpenGL 调用在任何情况下都会阻塞？

    if (glewInit() != GLEW_OK)
        BOOST_THROW_EXCEPTION(ogl_exception() << msg_info("Failed to initialize GLEW."));

    if(!GLEW_VERSION_3_0)
        LOG(warning) << "Missing OpenGL 3.0 support.";

    LOG(info) << L"Successfully initialized GLEW.";

    GL(glGenFramebuffers(1, &fbo_));        
    GL(glBindFramebuffer(GL_FRAMEBUFFER_EXT, fbo_));
    GL(glReadBuffer(GL_COLOR_ATTACHMENT0_EXT));
    GL(glDisable(GL_MULTISAMPLE_ARB));

    LOG(info) << L"Successfully initialized OpenGL Device.";

GL 只是一个宏调用并检查glGetError()。

void GLCheckError(const std::string& expr, const std::string& File, unsigned int Line);

#define GL_EXPR_STR(expr) #expr

#define GL(expr) \
    if(false){}else \
    { \
        (expr);  \
        GLCheckError(GL_EXPR_STR(expr), __FILE__, __LINE__);\
    }

void GLCheckError(const std::string& expr, const std::string& file, unsigned int line)
{
    // Get the last error
    GLenum ErrorCode = glGetError();

    if (ErrorCode != GL_NO_ERROR)
    {
        // Decode the error code
        switch (ErrorCode)
        {
            case GL_INVALID_ENUM :
                BOOST_THROW_EXCEPTION(ogl_invalid_enum()
                    << msg_info("an unacceptable value has been specified for an enumerated argument")
                    << errorstr("GL_INVALID_ENUM")
                    << line_info(line)
                    << source_info(file));

            case GL_INVALID_VALUE :
                BOOST_THROW_EXCEPTION(ogl_invalid_value()
                    << msg_info("a numeric argument is out of range")
                    << errorstr("GL_INVALID_VALUE")
                    << line_info(line)
                    << source_info(file));

            case GL_INVALID_OPERATION :
                BOOST_THROW_EXCEPTION(ogl_invalid_operation()
                    << msg_info("the specified operation is not allowed in the current state")
                    << errorstr("GL_INVALID_OPERATION")
                    << line_info(line)
                    << source_info(file));

            case GL_STACK_OVERFLOW :
                BOOST_THROW_EXCEPTION(ogl_stack_overflow()
                    << msg_info("this command would cause a stack overflow")
                    << errorstr("GL_STACK_OVERFLOW")
                    << line_info(line)
                    << source_info(file));

            case GL_STACK_UNDERFLOW :
                BOOST_THROW_EXCEPTION(ogl_stack_underflow()
                    << msg_info("this command would cause a stack underflow")
                    << errorstr("GL_STACK_UNDERFLOW")
                    << line_info(line)
                    << source_info(file));

            case GL_OUT_OF_MEMORY :
                BOOST_THROW_EXCEPTION(ogl_out_of_memory()
                    << msg_info("there is not enough memory left to execute the command")
                    << errorstr("GL_OUT_OF_MEMORY")
                    << line_info(line)
                    << source_info(file));

            case GL_INVALID_FRAMEBUFFER_OPERATION_EXT :
                BOOST_THROW_EXCEPTION(ogl_stack_underflow()
                    << msg_info("the object bound to FRAMEBUFFER_BINDING_EXT is not \"framebuffer complete\"")
                    << errorstr("GL_INVALID_FRAMEBUFFER_OPERATION_EXT")
                    << line_info(line)
                    << source_info(file));
        }
    }
}