Question

我试图编写一个简单的SDL2和OpenGL程序，但SDL_Init导致我的应用程序在开始时崩溃。这是代码：

#include <iostream>
#include <cstdint>
#include <windows.h>
#include <GL/gl.h>
#include <SDL2/SDL.h>

#define WIN_WIDTH 800
#define WIN_HEIGHT 600


int CALLBACK WinMain(
  HINSTANCE hInstance,
  HINSTANCE hPrevInstance,
  LPSTR lpCmdLine, 
  int nCmdShow) {

  int err;
  SDL_Window *window;
  SDL_GLContext context;
  uint32_t win_flags = SDL_WINDOW_OPENGL;

  std::cout << "before";

  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    std::cout << "fail";
    std::cout << "SDL Init Error: " << SDL_GetError() << std::endl;
  }

  std::cout << "success";

  window = SDL_CreateWindow("rgb", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 
    WIN_WIDTH, WIN_HEIGHT, win_flags);

  context = SDL_GL_CreateContext(window);

  SDL_GL_DeleteContext(context);
  SDL_DestroyWindow(window);
  SDL_Quit();

  return 0;
}

输出是：

before

然后它崩溃了。

调试器输出（当它进入WinMain时）：

WinMain (hInstance=0x0, hPrevInstance=0x1d04aa0, lpCmdLine=0x0, nCmdShow=0)
    at src/main.cpp:15
15    int nCmdShow) {
(gdb) s
20    uint32_t win_flags = SDL_WINDOW_OPENGL;
(gdb) s
22    std::cout << "before" << std::endl;
(gdb) s
before
24    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
(gdb) s

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()

SDL_Init没有明显原因崩溃

0 个答案: