我正在尝试让SDL2使用根X窗口来显示内容,但它似乎不起作用 - 窗口不会以任何方式改变。此外,由于某种原因,整个程序在SDL_Delay()
之后不会退出。这不可能吗?我做错了吗?
#include <SDL.h>
#include <X11/Xlib.h>
#include <stdio.h>
// clang -lSDL2 -lX11 -I/usr/include/SDL2 -Weverything x11.c -o x11
int main(void)
{
Display *x11_d;
int x11_s;
Window x11_w;
SDL_Window *w;
SDL_Renderer *r;
x11_d = XOpenDisplay(NULL);
if(!x11_d) {
fprintf(stderr, "couldn't open display\n");
return 1;
}
x11_s = DefaultScreen(x11_d);
x11_w = RootWindow(x11_d, x11_s);
if(SDL_Init(SDL_INIT_VIDEO) != 0) {
fprintf(stderr, "couldn't initialize SDL: %s\n", SDL_GetError());
return 1;
}
w = SDL_CreateWindowFrom((void *)x11_w);
XCloseDisplay(x11_d);
if(!w) {
fprintf(stderr, "couldn't attach to the root X11 window: %s\n", SDL_GetError());
return 1;
}
r = SDL_CreateRenderer(w, -1, 0);
SDL_SetRenderDrawColor(r, 255, 0, 0, 255);
SDL_RenderClear(r);
SDL_RenderPresent(r);
SDL_Delay(5700);
SDL_Quit();
return 0;
}
答案 0 :(得分:1)
您在创建SDL窗口后立即关闭X显示,因此您将失去连接。这显然没有帮助,但你也left out about 95% of the code required to get X working。教程here。