#include "xlib.h"
#include "scheme48.h"

// Open_Display(name) name should be a string or S48_FALSE (=> Null)
s48_value Open_Display (s48_value name) {
  char* cname = (char*)0;
  if (!S48_FALSE_P(name))
    cname = s48_extract_string(name);

  return ENTER_DISPLAY(XOpenDisplay(cname));
}

// Close_Display( Xdisplay ) Xdisplay should be a pointer to the X-lib struct 
// cast into a Scheme-Integer.
s48_value Close_Display(s48_value Xdisplay) {
  XCloseDisplay(EXTRACT_DISPLAY(Xdisplay));
  return S48_UNSPECIFIC;
}

// The following procedure mainly wrap a corresponding XLib macro without 
// underscores...
s48_value Display_Default_Root_Window(s48_value Xdisplay) {
  Window wnd = DefaultRootWindow(EXTRACT_DISPLAY(Xdisplay));
  return ENTER_WINDOW(wnd);
}

s48_value Display_Default_Colormap(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  Colormap cmp = DefaultColormap(dpy, DefaultScreen(dpy));
  return ENTER_COLORMAP(cmp);
}

s48_value Display_Default_Gcontext(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  GC gc = DefaultGC(dpy, DefaultScreen(dpy));
  return ENTER_GCONTEXT(gc);
}

s48_value Display_Default_Depth(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  int depth = DefaultDepth(dpy, DefaultScreen(dpy));
  return s48_enter_integer(depth);
}

s48_value Display_Default_Screen_Number(s48_value Xdisplay) {
  return s48_enter_integer(DefaultScreen(EXTRACT_DISPLAY(Xdisplay)));
}

s48_value Display_Cells(s48_value Xdisplay, s48_value ScrNum) {
  int num = (int)s48_extract_integer(ScrNum);
  return s48_enter_integer(DisplayCells(EXTRACT_DISPLAY(Xdisplay), num));
}

s48_value Display_Planes(s48_value Xdisplay, s48_value ScrNum) {
  int num = (int)s48_extract_integer(ScrNum);
  return s48_enter_integer(DisplayPlanes(EXTRACT_DISPLAY(Xdisplay), num));
}

s48_value Display_String(s48_value Xdisplay) {
  char* s = DisplayString(EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_string(s);
}

s48_value Display_Vendor(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  char* s = ServerVendor(dpy);
  int i = VendorRelease(dpy);
  return s48_cons( s48_enter_string(s),
		   s48_enter_integer(i) );
}

s48_value Display_Protocol_Version(s48_value Xdisplay) {
Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  int maj = ProtocolVersion(dpy);
  int min = ProtocolRevision(dpy);
  return s48_cons( s48_enter_integer(maj),
		   s48_enter_integer(min) );
}

s48_value Display_Screen_Count(s48_value Xdisplay) {
  int cnt = ScreenCount(EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(cnt);
}


s48_value Display_Image_Byte_Order(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  return Bits_To_Symbols( (unsigned long)ImageByteOrder(dpy),
			  0, Byte_Order_Syms );
}

s48_value Display_Bitmap_Unit(s48_value Xdisplay) {
  int bu = BitmapUnit(EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(bu);
}

s48_value Display_Bitmap_Bit_Order(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  return Bits_To_Symbols( (unsigned long)BitmapBitOrder(dpy),
			  0, Byte_Order_Syms );
}

s48_value Display_Bitmap_Pad(s48_value Xdisplay) {
  int bp = BitmapPad(EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(bp);
}

s48_value Display_Width(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_integer(DisplayWidth(dpy, DefaultScreen(dpy)));
}

s48_value Display_Height(s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_integer(DisplayHeight(dpy, DefaultScreen(dpy)));
}

s48_value Display_Width_Mm (s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_integer(DisplayWidthMM(dpy, DefaultScreen(dpy)));
}

s48_value Display_Height_Mm (s48_value Xdisplay) {
  Display* dpy = EXTRACT_DISPLAY(Xdisplay);
  return s48_enter_integer(DisplayHeightMM(dpy, DefaultScreen(dpy)));
}

s48_value Display_Motion_Buffer_Size(s48_value Xdisplay) {
  int mbs = XDisplayMotionBufferSize(EXTRACT_DISPLAY(Xdisplay));
  return s48_enter_integer(mbs);
}

s48_value Display_Flush_Output (s48_value Xdisplay) {
  XFlush (EXTRACT_DISPLAY(Xdisplay));
  return S48_UNSPECIFIC;
}

s48_value Display_Wait_Output (s48_value Xdisplay, s48_value discard) {
  XSync (EXTRACT_DISPLAY(Xdisplay), !S48_FALSE_P(discard));
  return S48_UNSPECIFIC;
}

s48_value No_Op (s48_value Xdisplay) {
  XNoOp(EXTRACT_DISPLAY(Xdisplay));
  return S48_UNSPECIFIC;
}

s48_value List_Depths (s48_value Xdisplay, s48_value scr) {
  int i, num;
  int* p;
  s48_value ret;
  S48_DECLARE_GC_PROTECT(1);

  p = XListDepths(EXTRACT_DISPLAY(Xdisplay), s48_extract_integer(scr), &num);
  if (!p) 
    ret = S48_FALSE;
  else {
    S48_GC_PROTECT_1(ret);
    ret = s48_make_vector(num, S48_NULL);
    for (i = 0; i < num; i++)
      S48_VECTOR_SET(ret, i, s48_enter_integer(p[i]));
    XFree((char *)p);
  }

  S48_GC_UNPROTECT();
  return ret;
}

s48_value List_Pixmap_Formats (s48_value Xdisplay) {
  int num, i;
  XPixmapFormatValues* p;
  s48_value ret, t;
  S48_DECLARE_GC_PROTECT(2);

  p = XListPixmapFormats(EXTRACT_DISPLAY(Xdisplay), &num);
 
  if (!p) 
    ret = S48_FALSE;
  else {
    S48_GC_PROTECT_2(ret, t);
    ret = s48_make_vector (num, S48_FALSE);
    for (i = 0; i < num; i++) {
      t = s48_cons(s48_enter_integer(p[i].depth),
		   s48_cons(s48_enter_integer(p[i].bits_per_pixel),
			    s48_cons(s48_enter_integer(p[i].scanline_pad), 
				     S48_NULL)));
      S48_VECTOR_SET(ret, i, t);
    }
    XFree ((char *)p);
  }

  S48_GC_UNPROTECT();
  return ret;
}

void s48_init_display(void) {
  S48_EXPORT_FUNCTION(Open_Display);
  S48_EXPORT_FUNCTION(Close_Display);
  S48_EXPORT_FUNCTION(Display_Default_Root_Window);
  S48_EXPORT_FUNCTION(Display_Default_Colormap);
  S48_EXPORT_FUNCTION(Display_Default_Gcontext);
  S48_EXPORT_FUNCTION(Display_Default_Depth);
  S48_EXPORT_FUNCTION(Display_Default_Screen_Number);
  S48_EXPORT_FUNCTION(Display_Cells);
  S48_EXPORT_FUNCTION(Display_Planes);
  S48_EXPORT_FUNCTION(Display_String);
  S48_EXPORT_FUNCTION(Display_Vendor);
  S48_EXPORT_FUNCTION(Display_Protocol_Version);
  S48_EXPORT_FUNCTION(Display_Screen_Count);
  S48_EXPORT_FUNCTION(Display_Image_Byte_Order);
  S48_EXPORT_FUNCTION(Display_Bitmap_Unit);
  S48_EXPORT_FUNCTION(Display_Bitmap_Bit_Order);
  S48_EXPORT_FUNCTION(Display_Bitmap_Pad);
  S48_EXPORT_FUNCTION(Display_Width);
  S48_EXPORT_FUNCTION(Display_Height);
  S48_EXPORT_FUNCTION(Display_Width_Mm);
  S48_EXPORT_FUNCTION(Display_Height_Mm);
  S48_EXPORT_FUNCTION(Display_Motion_Buffer_Size);
  S48_EXPORT_FUNCTION(Display_Flush_Output);
  S48_EXPORT_FUNCTION(Display_Wait_Output);
  S48_EXPORT_FUNCTION(No_Op);
  S48_EXPORT_FUNCTION(List_Depths);
  S48_EXPORT_FUNCTION(List_Pixmap_Formats);
}