/*
name: stk_display.cc
info: stk display routines - implementation
author: Dusan Halicky (dvh.tosomja@post.sk)
licence: GNU GPL
history: 2005-09-27 - start of developement
todo: - finish and release this
bugs: - 
*/

// system header files 
#include <X11/Xlib.h>
#include <stdio.h>
#include <stdlib.h>

// local header files
#include "stk_constants.h"

// this file header
#include "stk_display.h"

// debugging
#ifdef STK_DEBUG
#define STK_DISPLAY_DEBUG
#endif

// implementation
Display *stkdisplay;
int stkdisplay_screen;
int stkdisplay_width;
int stkdisplay_height;
Window stkdisplay_root;

// open the display
Display *stk_display_open(char *display_name)
{
  // open stkdisplay and set variables
#ifdef STK_DISPLAY_DEBUG
  printf("stk_open_display: opening display '%s' ..",display_name);
#endif
  Display *dpy = XOpenDisplay(display_name);
  if (!dpy)
    {
      printf(". error, cannot open display!\n");
      exit(1);
    } 
#ifdef STK_DISPLAY_DEBUG
    else
    {
      printf(". done\n");
    }
#endif
  // get various useful infos
  stkdisplay_screen = DefaultScreen(dpy);
  stkdisplay_width = DisplayWidth(dpy, stkdisplay_screen);
  stkdisplay_height = DisplayHeight(dpy, stkdisplay_screen);
  stkdisplay_root = DefaultRootWindow(dpy);
#ifdef STK_DISPLAY_DEBUG
  printf("stk_display: screen=%d width=%d height=%d\n",stkdisplay_screen,stkdisplay_width,stkdisplay_height);
#endif
  // return display
  return dpy;
}

void stk_display_init(void)
{
  // initialize global display
  stkdisplay = stk_display_open(0);
}

void stk_display_done(void)
{
  // release global display
#ifdef STK_DISPLAY_DEBUG
  printf("stk_display: closing display ..");
#endif
  XCloseDisplay(stkdisplay);
#ifdef STK_DISPLAY_DEBUG
  printf(". done\n");
#endif
}


// end of file