如何在调整win32窗口大小时绘制OpenGL内容

#include<windows.h>
#include <gl/GL.h>
#include <gl/GLU.h>

// 窗口大小更改回调函数
void resizeWindow(int width, int height)
{
    // 设置OpenGL视口
    glViewport(0, 0, width, height);
}

// Win32窗口消息处理函数
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_SIZE:
        // 获取新的窗口大小
        int width = LOWORD(lParam);
        int height = HIWORD(lParam);
        // 调用窗口大小更改回调函数
        resizeWindow(width, height);
        break;
    case WM_CLOSE:
        DestroyWindow(hWnd);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    // 注册窗口类
    WNDCLASSEX wc;
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = "OpenGLWindow";
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    if (!RegisterClassEx(&wc))
    {
        MessageBox(NULL, "Failed to register window class", "Error", MB_OK | MB_ICONERROR);
        return 0;
    }

    // 创建窗口
    HWND hWnd = CreateWindowEx(WS_EX_CLIENTEDGE, "OpenGLWindow", "OpenGL Window", WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 800, 600, NULL, NULL, hInstance, NULL);

    if (!hWnd)
    {
        MessageBox(NULL, "Failed to create window", "Error", MB_OK | MB_ICONERROR);
        return 0;
    }

    // 显示窗口
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    // 创建OpenGL上下文
    HDC hDC = GetDC(hWnd);
    PIXELFORMATDESCRIPTOR pfd;
    ZeroMemory(&pfd, sizeof(pfd));
    pfd.nSize = sizeof(pfd);
    pfd.nVersion = 1;
    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
    pfd.iPixelType = PFD_TYPE_RGBA;
    pfd.cColorBits = 32;
    pfd.cAlphaBits = 8;
    pfd.cDepthBits = 24;
    pfd.cStencilBits = 8;
    int iFormat = ChoosePixelFormat(hDC, &pfd);
    SetPixelFormat(hDC, iFormat, &pfd);
    HGLRC hRC = wglCreateContext(hDC);
    wglMakeCurrent(hDC, hRC);

    // 初始化OpenGL
    // ...

    // 主循环
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);

        // 渲染OpenGL内容
        // ...

        // 交换缓冲区
        SwapBuffers(hDC);
    }

    // 释放资源
    wglMakeCurrent(NULL, NULL);
    wglDeleteContext(hRC);
    ReleaseDC(hWnd, hDC);
    DestroyWindow(hWnd);

    return msg.wParam;
}