X11 基本绘图
#include <X11/Xlib.h> int main() { Display * dsp = XOpenDisplay(NULL); int screenNum = DefaultScreen(dsp); unsigned long white = WhitePixel(dsp, screenNum); unsigned long black = BlackPixel(dsp, screenNum); Window win = XCreateSimpleWindow(dsp, DefaultRootWindow(dsp), 0, 0, 1024, 800, 0, black, white); XSelectInput(dsp, win, ExposureMask | KeyPressMask); GC gc = XCreateGC(dsp, win, 0, NULL); XMapWindow(dsp, win); XFlush(dsp); XEvent event; do { XNextEvent(dsp, &event); switch (event.type) { case Expose: for (int i = 0; i < 300; ++i) { XDrawPoint(dsp, win, gc, 400+i, 400); } break; default: break; } } while (event.type != MapNotify); return 0; }