#include "xlib.h"

s48_value Enter_Visual_And_Visual_Info(XVisualInfo* vi) {
  s48_value t = s48_make_vector(10, S48_FALSE);
  S48_DECLARE_GC_PROTECT(1);
  
  S48_GC_PROTECT_1(t);

  S48_VECTOR_SET(t, 0, s48_enter_integer(vi->visualid));
  S48_VECTOR_SET(t, 1, s48_enter_fixnum(vi->screen));
  S48_VECTOR_SET(t, 2, s48_enter_fixnum(vi->depth));
  S48_VECTOR_SET(t, 3, s48_enter_integer(vi->class));
  S48_VECTOR_SET(t, 4, s48_enter_integer(vi->red_mask));
  S48_VECTOR_SET(t, 5, s48_enter_integer(vi->green_mask));
  S48_VECTOR_SET(t, 6, s48_enter_integer(vi->blue_mask));
  S48_VECTOR_SET(t, 7, s48_enter_integer(vi->colormap_size));
  S48_VECTOR_SET(t, 8, s48_enter_fixnum(vi->bits_per_rgb));

  t = s48_cons(s48_enter_integer(VisualAllMask), t);

  t = s48_cons(SCX_ENTER_VISUAL(vi->visual), t);

  S48_GC_UNPROTECT();
  return t;
}

unsigned long Extract_Visual_Info(s48_value vi, XVisualInfo* VI) {
  unsigned long mask = s48_extract_integer(S48_CAR(vi));
  s48_value v = S48_CDR(vi);
  
  if (mask & VisualIDMask)
    VI->visualid = s48_extract_integer(S48_VECTOR_REF(v, 0));
  if (mask & VisualScreenMask)
    VI->screen = s48_extract_integer(S48_VECTOR_REF(v, 1));
  if (mask & VisualDepthMask)
    VI->depth = s48_extract_integer(S48_VECTOR_REF(v, 2));
  if (mask & VisualClassMask)
    VI->class = s48_extract_integer(S48_VECTOR_REF(v, 3));
  if (mask & VisualRedMaskMask)
    VI->red_mask = s48_extract_integer(S48_VECTOR_REF(v, 4));
  if (mask & VisualGreenMaskMask)
    VI->green_mask = s48_extract_integer(S48_VECTOR_REF(v, 5));
  if (mask & VisualBlueMaskMask)
    VI->blue_mask = s48_extract_integer(S48_VECTOR_REF(v, 6));
  if (mask & VisualColormapSizeMask)
    VI->colormap_size = s48_extract_integer(S48_VECTOR_REF(v, 7));
  if (mask & VisualBitsPerRGBMask)
    VI->bits_per_rgb = s48_extract_integer(S48_VECTOR_REF(v, 8));

  return mask;
}

s48_value scx_Get_Visual_Info(s48_value Xdisplay, s48_value v) {
  XVisualInfo template;
  XVisualInfo* visualList;
  int visualsMatch, i;
  long mask = VisualNoMask;
  s48_value res = S48_FALSE;
  S48_DECLARE_GC_PROTECT(1);

  mask = Extract_Visual_Info(v, &template);
  
  visualList = XGetVisualInfo( SCX_EXTRACT_DISPLAY(Xdisplay),
			       mask, &template, &visualsMatch);

  res = s48_make_vector(visualsMatch, S48_FALSE);
  S48_GC_PROTECT_1(res);
  
  for (i=0; i<visualsMatch; i++)
    S48_VECTOR_SET(res, i, Enter_Visual_And_Visual_Info(&visualList[i]));
  
  S48_GC_UNPROTECT();
  return res;
}

s48_value scx_Visual_ID(s48_value Xvisual) {
  return s48_enter_integer(XVisualIDFromVisual(SCX_EXTRACT_VISUAL(Xvisual)));
}

s48_value scx_Match_Visual_Info(s48_value Xdisplay, s48_value scrnum, 
				s48_value depth, s48_value class) {
  XVisualInfo r;
  if (XMatchVisualInfo(SCX_EXTRACT_DISPLAY(Xdisplay),
		       s48_extract_integer(scrnum),
		       s48_extract_integer(depth),
		       s48_extract_integer(class),
		       &r))
    return Enter_Visual_And_Visual_Info(&r);
  else
    return S48_FALSE;
}    

void scx_init_visual(void) {
  S48_EXPORT_FUNCTION(scx_Get_Visual_Info);
  S48_EXPORT_FUNCTION(scx_Visual_ID);
  S48_EXPORT_FUNCTION(scx_Match_Visual_Info);
}