#include <X11/Xlib.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
  Display *display;
  int screen_number;
  Colormap cm;
  int count;
  int *depths;
  int i;
  GC gc;
  Window root;
  Screen* screen;
  Visual* visual;
  XPixmapFormatValues *pf;

  if ((display = XOpenDisplay(NULL)) == NULL) {
    fprintf(stderr, "cannot open display\n");
    exit(1);
  }
  screen_number = DefaultScreen(display);

  pf = XListPixmapFormats(display, &count);
  if (pf != NULL) {
    for (i=0; i<count; ++i) {
      printf("Pixmap Format %d:\n", i);
      printf("  depth: %d\n", pf[i].depth);
      printf("  bpp: %d\n", pf[i].bits_per_pixel);
      printf("  scanline_pad: %d\n", pf[i].scanline_pad);
    }
    XFree(pf);
  }

  visual = DefaultVisual(display, screen_number);
  screen = ScreenOfDisplay(display, screen_number);
  // screen = DefaultScreenOfDisplay(display);
  root = DefaultRootWindow(display);
  gc = DefaultGC(display, screen_number);
  depths = XListDepths(display, screen_number, &count);
  if (depths != NULL) {
    for (i=0; i<count; ++i) {
      printf("depth: %d\n", depths[i]);
    }
    XFree(depths);
  }
  cm = DefaultColormap(display, screen_number);
  printf("white pixel: %ld\n", WhitePixel(display, screen_number));
  printf("default depth: %d\n", DefaultDepth(display, screen_number));
  printf("cells: %d\n", DisplayCells(display, screen_number));
  printf("planes: %d\n", DisplayPlanes(display, screen_number));
  printf("display: %s\n", DisplayString(display));
  printf("extended max request size: %ld\n", XExtendedMaxRequestSize(display));
  printf("max request size: %ld\n", XMaxRequestSize(display));
  printf("protocol version: %d\n", ProtocolVersion(display));
  printf("protocol revision: %d\n", ProtocolRevision(display));
  printf("screen count: %d\n", ScreenCount(display));
  printf("server vendor: %s\n", ServerVendor(display));
  printf("vendor release: %d\n", VendorRelease(display));
  printf("screen width: %d\n", DisplayWidth(display, screen_number));
  printf("screen height: %d\n", DisplayHeight(display, screen_number));
  printf("screen width mm: %d\n", DisplayWidthMM(display, screen_number));
  printf("screen height mm: %d\n", DisplayHeightMM(display, screen_number));
  printf("max cmaps: %d\n", MaxCmapsOfScreen(screen));
  XNoOp(display);
  XCloseDisplay(display);
  exit(0);
}