opengl 3.3中的黑屏输出

#include <GLFW/glfw3.h>

int main() {
    if (!glfwInit()) {
        // 初始化失败
        return -1;
    }

    GLFWwindow* window = glfwCreateWindow(800, 600, "OpenGL", NULL, NULL);
    if (!window) {
        glfwTerminate();
        // 窗口创建失败
        return -1;
    }

    glfwMakeContextCurrent(window);

    // 检查OpenGL版本
    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
        // 加载OpenGL函数失败
        return -1;
    }

    while (!glfwWindowShouldClose(window)) {
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        // 渲染代码

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

GLuint shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(shader, 1, &vertexShaderSource, NULL);
glCompileShader(shader);

GLint success;
GLchar infoLog[512];
glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
if (!success) {
    glGetShaderInfoLog(shader, 512, NULL, infoLog);
    std::cerr << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n" << infoLog << std::endl;
}

glViewport(0, 0, 800, 600);

glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);

GLuint fbo;
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);

// 配置颜色附件、深度附件等

GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);

// 加载图像数据并上传到纹理