scx/c/xlib/colormap.c

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

s48_value scx_Free_Colormap (s48_value Xcolormap, s48_value Xdisplay) {
  XFreeColormap(SCX_EXTRACT_DISPLAY(Xdisplay), 
		SCX_EXTRACT_COLORMAP(Xcolormap));
  return S48_UNSPECIFIC;
}

s48_value scx_Alloc_Color(s48_value Xcolormap, s48_value Xcolor, 
			  s48_value Xdisplay) {
  XColor* cp = SCX_EXTRACT_COLOR(Xcolor);

  if (!XAllocColor(SCX_EXTRACT_DISPLAY(Xdisplay), 
		   SCX_EXTRACT_COLORMAP(Xcolormap), cp))
    return S48_FALSE;
  else 
    return SCX_ENTER_PIXEL(cp->pixel);
}

s48_value scx_Alloc_Named_Color(s48_value Xcolormap, s48_value color_name,
				s48_value Xdisplay) {
  XColor screen, exact;
  int r;
  s48_value ret = S48_FALSE;

  S48_DECLARE_GC_PROTECT(1);

  r = XAllocNamedColor (SCX_EXTRACT_DISPLAY(Xdisplay), 
			SCX_EXTRACT_COLORMAP(Xcolormap), 
			s48_extract_string(color_name),
			&screen, &exact);

  if (r) {
    S48_GC_PROTECT_1(ret);
    ret = s48_cons(scx_Int_Extract_RGB_Values(exact), S48_NULL);
    ret = s48_cons(scx_Int_Extract_RGB_Values(screen), ret);
    ret = s48_cons(SCX_ENTER_PIXEL(screen.pixel), ret);
  }

  S48_GC_UNPROTECT();
  return ret;
}

// swaped from util.c to this file

s48_value scx_Parse_Color (s48_value Xdpy, s48_value cmap, s48_value spec) {
  XColor ret;
  
  if (XParseColor (SCX_EXTRACT_DISPLAY(Xdpy),
		   SCX_EXTRACT_COLORMAP(cmap),
		   s48_extract_string(spec),
		   &ret))
    return scx_Create_Color (ret.red, ret.green, ret.blue);
  return S48_FALSE;
}

void scx_init_colormap(void) {
  S48_EXPORT_FUNCTION(scx_Free_Colormap);
  S48_EXPORT_FUNCTION(scx_Alloc_Color);
  S48_EXPORT_FUNCTION(scx_Alloc_Named_Color);
  S48_EXPORT_FUNCTION(scx_Parse_Color);
}