/* Copyright (c) Mark J. Kilgard, 1996. *//* This program is freely distributable without licensing fees    and is provided without guarantee or warrantee expressed or    implied. This program is -not- in the public domain. *//* compile: cc -o sovinfo sovinfo.c sovLayerUtil.c -lX11 */#include <stdio.h>#include <stdlib.h>#include <string.h>#include "sovLayerUtil.h"intmain(int argc, char *argv[]){  Display *dpy;  char *display_name, *arg, *class;  sovVisualInfo template, *lvinfo;  int nVisuals, i, overlaysOnly = 0;  display_name = NULL;  for (i = 1; i < argc; i++) {    arg = argv[i];    if (!strcmp(arg, "-display")) {      if (++i >= argc) {        fprintf(stderr, "sovinfo: missing argument to -display\n");        exit(1);      }      display_name = argv[i];    } else if (!strcmp(arg, "-overlays_only")) {      overlaysOnly = 1;    } else {      fprintf(stderr,        "usage: sovinfo [-display dpy] [-overlays_only]\n");      exit(1);    }  }  dpy = XOpenDisplay(display_name);  if (dpy == NULL) {    fprintf(stderr, "sovinfo: cannot open display %s\n",      XDisplayName(NULL));    exit(1);  }  lvinfo = sovGetVisualInfo(dpy, 0L, &template, &nVisuals);  for (i = 0; i < nVisuals; i++) {    if (!overlaysOnly || lvinfo[i].layer > 0) {      printf("  Visual ID: 0x%x\n", lvinfo[i].vinfo.visualid);      printf("    screen: %d\n", lvinfo[i].vinfo.screen);      printf("    depth: %d\n", lvinfo[i].vinfo.depth);      switch (lvinfo[i].vinfo.class) {      case StaticGray:        class = "StaticGray";        break;      case GrayScale:        class = "GrayScale";        break;      case StaticColor:        class = "StaticColor";        break;      case PseudoColor:        class = "PseudoColor";        break;      case TrueColor:        class = "TrueColor";        break;      case DirectColor:        class = "DirectColor";        break;      default:        class = "Unknown";        break;      }      printf("    class: %s\n", class);      switch (lvinfo[i].type) {      case None:        printf("    transparent type: None\n");        break;      case TransparentPixel:        printf("    transparent type: TransparentPixel\n");        printf("    pixel value: %d\n", lvinfo[i].value);        break;      case TransparentMask:        printf("    transparent type: TransparentMask\n");        printf("    transparency mask: %0x%x\n", lvinfo[i].value);        break;      default:        printf("    transparent type: Unknown or invalid\n");        break;      }      printf("    layer: %d\n", lvinfo[i].layer);    }  }  return 0;}