scx/c/libs/xpm.c

#include "../xlib/xlib.h"
#include <X11/xpm.h>

/*void ExtractColorsymbols(s48_value v, XpmColorSymbols** CS, unsigned int* n) {
  int i; int len = S48_VECTOR_LENGTH
*/

void Attribs_To_XpmAttributes(s48_value attribs,
			      XpmAttributes* XA) {
  unsigned long mask = s48_extract_integer(S48_CAR(attribs));
  s48_value v = S48_CDR(attribs);

  if (mask & XpmVisual)
    XA->visual = SCX_EXTRACT_VISUAL(v);
  if (mask & XpmColormap)
    XA->colormap = SCX_EXTRACT_COLORMAP(v);
  if (mask & XpmDepth)
    XA->depth = s48_extract_integer(v);
  if ((mask & XpmReturnPixels) && (S48_FALSE_P(v)))
    mask = mask & (~XpmReturnPixels);
  if (mask & XpmExactColors)
    XA->exactColors = s48_extract_integer(v);
  if ((mask & XpmReturnAllocPixels) && (S48_FALSE_P(v)))
    mask = mask & (~XpmReturnAllocPixels);
  if (mask & XpmAllocCloseColors)
    XA->alloc_close_colors = s48_extract_integer(v);
  if (mask & XpmBitmapFormat)
    XA->bitmap_format = s48_extract_integer(v);

//  if (mask & XpmColorSymbols)
//    XA->colorsyms = ExtractColorsymbols(v, XA->colorsymbols, XA->numsymbols);

  XA->valuemask = mask;
  return;
}

s48_value Make_XPM_Result(Pixmap* pixmap, Pixmap* shapemask,
			  XpmAttributes* XA) {

  s48_value res = s48_make_vector(6, S48_FALSE);
  S48_DECLARE_GC_PROTECT(1);
  S48_GC_PROTECT_1(res);

  S48_VECTOR_SET(res, 0, SCX_ENTER_PIXMAP(*pixmap));
  S48_VECTOR_SET(res, 1, s48_cons(s48_enter_fixnum(XA->width), 
				  s48_enter_fixnum(XA->height)));
  if (XA->valuemask & XpmHotspot != 0)
    S48_VECTOR_SET(res, 2, s48_cons(s48_enter_fixnum(XA->x_hotspot), 
				    s48_enter_fixnum(XA->y_hotspot)));
  S48_VECTOR_SET(res, 3, SCX_ENTER_PIXMAP(*shapemask));

  S48_GC_UNPROTECT();
  return res;
}


s48_value scx_Create_Pixmap_From_Data(s48_value Xdisplay, s48_value Xdrawable,
				      s48_value data, 
				      s48_value attribute_vector) {
  Pixmap pixmap, shapemask;
  XpmAttributes XA;
  int r, i, n = S48_VECTOR_LENGTH(data);
  char* d[n];

  for (i=0; i < n; i++)
    d[i] = s48_extract_string(S48_VECTOR_REF(data, i));
  
  Attribs_To_XpmAttributes(attribute_vector, &XA);

  r = XpmCreatePixmapFromData( SCX_EXTRACT_DISPLAY(Xdisplay),
			       SCX_EXTRACT_DRAWABLE(Xdrawable),
			       d,
			       &pixmap, &shapemask,
			       &XA );
  if (r == XpmNoMemory) return s48_enter_fixnum(0);
  else if (r == XpmFileInvalid) return s48_enter_fixnum(1);
  else if (r == XpmSuccess)
    return Make_XPM_Result(&pixmap, &shapemask, &XA);
}

s48_value scx_Read_File_To_Pixmap(s48_value Xdisplay, s48_value Xdrawable,
				  s48_value filename, 
				  s48_value attribute_vector) {
  Pixmap pixmap, shapemask;
  XpmAttributes XA;
  int r;

  Attribs_To_XpmAttributes(attribute_vector, &XA);

  r = XpmReadFileToPixmap( SCX_EXTRACT_DISPLAY(Xdisplay),
			   SCX_EXTRACT_DRAWABLE(Xdrawable),
			   s48_extract_string(filename),
			   &pixmap, &shapemask,
			   &XA );
  if (r == XpmNoMemory) return s48_enter_fixnum(0);
  else if (r == XpmFileInvalid) return s48_enter_fixnum(1);
  else if (r == XpmOpenFailed) return s48_enter_fixnum(2);
  else if (r == XpmSuccess)
    return Make_XPM_Result(&pixmap, &shapemask, &XA);
}


void scx_init_xpm(void) {
  S48_EXPORT_FUNCTION(scx_Create_Pixmap_From_Data);
  S48_EXPORT_FUNCTION(scx_Read_File_To_Pixmap);
}