rxvt-unicode/src/rxvttoolkit.C

/*----------------------------------------------------------------------*
 * File:        rxvttoolkit.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2003-2007 Marc Lehmann <pcg@goof.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "../config.h"
#include <rxvt.h>
#include <rxvttoolkit.h>

#include <unistd.h>
#include <fcntl.h>

#include <sys/utsname.h>
#include <sys/socket.h>
#include <sys/un.h>

#if XFT
# include <X11/extensions/Xrender.h>
#endif

static const char *const xa_names[] =
{
  "TEXT",
  "COMPOUND_TEXT",
  "UTF8_STRING",
  "MULTIPLE",
  "TARGETS",
  "TIMESTAMP",
  "VT_SELECTION",
  "INCR",
  "WM_PROTOCOLS",
  "WM_DELETE_WINDOW",
  "CLIPBOARD",
  "AVERAGE_WIDTH",
  "WEIGHT_NAME",
  "SLANT",
  "CHARSET_REGISTRY",
  "CHARSET_ENCODING",
#if ENABLE_FRILLS
  "_MOTIF_WM_HINTS",
#endif
#if ENABLE_EWMH
  "_NET_WM_PID",
  "_NET_WM_NAME",
  "_NET_WM_ICON_NAME",
  "_NET_WM_PING",
  "_NET_WM_ICON",
#endif
#if USE_XIM
  "WM_LOCALE_NAME",
  "XIM_SERVERS",
#endif
#ifdef ENABLE_TRANSPARENCY
  "_XROOTPMAP_ID",
  "ESETROOT_PMAP_ID",
#endif
#if ENABLE_XEMBED
  "_XEMBED",
  "_XEMBED_INFO",
#endif
#if !ENABLE_MINIMAL
  "SCREEN_RESOURCES",
  "XDCCC_LINEAR_RGB_CORRECTION",
  "XDCCC_LINEAR_RGB_MATRICES",
  "WM_COLORMAP_WINDOWS",
  "WM_STATE",
  "cursor",
# if USE_XIM
  "TRANSPORT",
  "LOCALES",
  "_XIM_PROTOCOL",
  "_XIM_XCONNECT",
  "_XIM_MOREDATA",
# endif
#endif
};

/////////////////////////////////////////////////////////////////////////////

refcounted::refcounted (const char *id)
{
  this->id = strdup (id);
}

refcounted::~refcounted ()
{
  free (id);
}

template<class T>
T *refcache<T>::get (const char *id)
{
  for (T **i = this->begin (); i < this->end (); ++i)
    {
      if (!strcmp (id, (*i)->id))
        {
          ++(*i)->referenced;
          (*i)->ref_next ();
          return *i;
        }
    }

  T *obj = new T (id);

  if (obj && obj->ref_init ())
    {
      obj->referenced = 1;
      this->push_back (obj);
      return obj;
    }
  else
    {
      delete obj;
      return 0;
    }
}

template<class T>
void refcache<T>::put (T *obj)
{
  if (!obj)
    return;

  if (!--obj->referenced)
    {
      this->erase (find (this->begin (), this->end (), obj));
      delete obj;
    }
}

template<class T>
void refcache<T>::clear ()
{
  while (this->size ())
    put (*this->begin ());
}

/////////////////////////////////////////////////////////////////////////////

#ifdef USE_XIM

static void
#if XIMCB_PROTO_BROKEN
im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
#else
im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
#endif
{
  rxvt_xim *xim = (rxvt_xim *)client_data;
  rxvt_display *display = xim->display;

  xim->xim = 0;

  display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
  display->im_change_cb ();
}

bool
rxvt_xim::ref_init ()
{
  display = GET_R->display; //HACK: TODO

  xim = XOpenIM (display->dpy, 0, 0, 0);

  if (!xim)
    return false;

  XIMCallback ximcallback;
  ximcallback.client_data = (XPointer)this;
  ximcallback.callback = im_destroy_cb;

  XSetIMValues (xim, XNDestroyCallback, &ximcallback, (char *)0);

  return true;
}

rxvt_xim::~rxvt_xim ()
{
  if (xim)
    XCloseIM (xim);
}

#endif

/////////////////////////////////////////////////////////////////////////////

#if XFT
rxvt_drawable::~rxvt_drawable ()
{
  if (xftdrawable)
    XftDrawDestroy (xftdrawable);
}

rxvt_drawable::operator XftDraw *()
{
  if (!xftdrawable)
    xftdrawable = XftDrawCreate (screen->dpy, drawable, screen->visual, screen->cmap);

  return xftdrawable;
}
#endif

/////////////////////////////////////////////////////////////////////////////

#if XFT

// not strictly necessary as it is only used with superclass of zero_initialised
rxvt_screen::rxvt_screen ()
: scratch_area (0)
{
}

rxvt_drawable &rxvt_screen::scratch_drawable (int w, int h)
{
  // it's actually faster to re-allocate every time. don't ask me
  // why, but its likely no big deal there are no roundtrips
  // (I think/hope).
  if (!scratch_area || w > scratch_w || h > scratch_h || 1/*D*/)
    {
      if (scratch_area)
        {
          XFreePixmap (dpy, scratch_area->drawable);
          delete scratch_area;
        }

      Pixmap pm = XCreatePixmap (dpy, RootWindowOfScreen (ScreenOfDisplay (dpy, display->screen)),
                                 scratch_w = w, scratch_h = h, depth);

      scratch_area = new rxvt_drawable (this, pm);
    }

  return *scratch_area;
}

#endif

void
rxvt_screen::set (rxvt_display *disp)
{
  display = disp;
  dpy     = disp->dpy;

  Screen *screen = ScreenOfDisplay (dpy, disp->screen);

  depth   = DefaultDepthOfScreen    (screen);
  visual  = DefaultVisualOfScreen   (screen);
  cmap    = DefaultColormapOfScreen (screen);
}

void
rxvt_screen::select_visual (int bitdepth)
{
#if XFT
  XVisualInfo vinfo;

  if (XMatchVisualInfo (dpy, display->screen, bitdepth, TrueColor, &vinfo))
    {
      depth  = bitdepth;
      visual = vinfo.visual;
      cmap   = XCreateColormap (dpy, display->root, visual, AllocNone);
    }
#endif
}

void
rxvt_screen::clear ()
{
#if XFT
  if (scratch_area)
    {
      XFreePixmap (dpy, scratch_area->drawable);
      delete scratch_area;
    }
#endif

  if (cmap != DefaultColormapOfScreen (ScreenOfDisplay (dpy, display->screen)))
    XFreeColormap (dpy, cmap);
}

/////////////////////////////////////////////////////////////////////////////

rxvt_display::rxvt_display (const char *id)
: refcounted (id)
, selection_owner (0)
, clipboard_owner (0)
{
  x_ev    .set<rxvt_display, &rxvt_display::x_cb    > (this);
  flush_ev.set<rxvt_display, &rxvt_display::flush_cb> (this);
}

XrmDatabase
rxvt_display::get_resources (bool refresh)
{
  char *homedir = getenv ("HOME");
  char fname[1024];

  /*
   * get resources using the X library function
   */
  char *displayResource, *xe;
  XrmDatabase rdb1, database = 0;

  // for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
  // as opposed to "standard practise", we always read in ~/.Xdefaults

  // 6. System wide per application default file.

  /* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
  if ((xe = getenv ("XAPPLRESDIR")))
    {
      snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);

      if ((rdb1 = XrmGetFileDatabase (fname)))
        XrmMergeDatabases (rdb1, &database);
    }

  // 5. User's per application default file.
  // none

  // 4. User's defaults file.
  if (homedir)
    {
      snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);

      if ((rdb1 = XrmGetFileDatabase (fname)))
        XrmMergeDatabases (rdb1, &database);
    }

  /* Get any Xserver defaults */
  if (refresh)
    {
      // fucking xlib keeps a copy of the rm string
      Atom actual_type;
      int actual_format;
      unsigned long nitems, nremaining;
      char *val = 0;

#if XLIB_ILLEGAL_ACCESS
      if (dpy->xdefaults)
        XFree (dpy->xdefaults);
#endif

      if (XGetWindowProperty (dpy, RootWindow (dpy, 0), XA_RESOURCE_MANAGER,
                              0L, 100000000L, False,
                              XA_STRING, &actual_type, &actual_format,
                              &nitems, &nremaining,
                              (unsigned char **)&val) == Success
          && actual_type == XA_STRING
          && actual_format == 8)
        displayResource = val;
      else
        {
          displayResource = 0;

          if (val)
            XFree (val);
        }

#if XLIB_ILLEGAL_ACCESS
      dpy->xdefaults = displayResource;
#endif
    }
  else
    displayResource = XResourceManagerString (dpy);

  if (displayResource)
    {
      if ((rdb1 = XrmGetStringDatabase (displayResource)))
        XrmMergeDatabases (rdb1, &database);
    }

#if !XLIB_ILLEGAL_ACCESS
  if (refresh && displayResource)
    XFree (displayResource);
#endif

  /* Get screen specific resources */
  displayResource = XScreenResourceString (ScreenOfDisplay (dpy, screen));

  if (displayResource)
    {
      if ((rdb1 = XrmGetStringDatabase (displayResource)))
        /* Merge with screen-independent resources */
        XrmMergeDatabases (rdb1, &database);

      XFree (displayResource);
    }

  // 3. User's per host defaults file
  /* Add in XENVIRONMENT file */
  if ((xe = getenv ("XENVIRONMENT"))
      && (rdb1 = XrmGetFileDatabase (xe)))
    XrmMergeDatabases (rdb1, &database);
  else if (homedir)
    {
      struct utsname un;

      if (!uname (&un))
        {
          snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);

          if ((rdb1 = XrmGetFileDatabase (fname)))
            XrmMergeDatabases (rdb1, &database);
        }
    }

  return database;
}

bool rxvt_display::ref_init ()
{
#ifdef LOCAL_X_IS_UNIX
  if (id[0] == ':')
    {
      if (!(val = rxvt_temp_buf<char> (5 + strlen (id) + 1)))
        return false;
      strcpy (val, "unix/");
      strcat (val, id);
      dpy = XOpenDisplay (val);
    }
  else
#endif
    dpy = 0;

  if (!dpy)
    dpy = XOpenDisplay (id);

  if (!dpy)
    return false;

  screen = DefaultScreen     (dpy);
  root   = DefaultRootWindow (dpy);

  assert (ARRAY_LENGTH(xa_names) == NUM_XA);
  XInternAtoms (dpy, (char **)xa_names, NUM_XA, False, xa);

  XrmSetDatabase (dpy, get_resources (false));

#ifdef POINTER_BLANK
  XColor blackcolour;
  blackcolour.red   = 0;
  blackcolour.green = 0;
  blackcolour.blue  = 0;
  Font f = XLoadFont (dpy, "fixed");
  blank_cursor = XCreateGlyphCursor (dpy, f, f, ' ', ' ',
                                     &blackcolour, &blackcolour);
  XUnloadFont (dpy, f);
#endif

  int fd = XConnectionNumber (dpy);

  // try to detect whether we have a local connection.
  // assume unix domain socket == local, everything else not
  // TODO: might want to check for inet/127.0.0.1
  is_local = 0;
  sockaddr_un sa;
  socklen_t sl = sizeof (sa);

  if (!getsockname (fd, (sockaddr *)&sa, &sl))
    is_local = sa.sun_family == AF_UNIX;

  flush_ev.start ();
  x_ev.start (fd, ev::READ);
  fcntl (fd, F_SETFD, FD_CLOEXEC);

  XSelectInput (dpy, root, PropertyChangeMask);

  flush ();

  return true;
}

void
rxvt_display::ref_next ()
{
  // TODO: somehow check whether the database files/resources changed
  // before affording re-loading/parsing
  XrmDestroyDatabase (XrmGetDatabase (dpy));
  XrmSetDatabase (dpy, get_resources (true));
}

rxvt_display::~rxvt_display ()
{
  if (!dpy)
    return;

#ifdef POINTER_BLANK
  XFreeCursor (dpy, blank_cursor);
#endif
  x_ev.stop ();
  flush_ev.stop ();
#ifdef USE_XIM
  xims.clear ();
#endif
  XrmDestroyDatabase (XrmGetDatabase (dpy));
  XCloseDisplay (dpy);
}

#ifdef USE_XIM
void rxvt_display::im_change_cb ()
{
  for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
    (*i)->call ();
}

void rxvt_display::im_change_check ()
{
  // try to only call im_change_cb when a new input method
  // registers, as xlib crashes due to a race otherwise.
  Atom actual_type, *atoms;
  int actual_format;
  unsigned long nitems, bytes_after;

  if (XGetWindowProperty (dpy, root, xa[XA_XIM_SERVERS], 0L, 1000000L,
                          False, XA_ATOM, &actual_type, &actual_format,
                          &nitems, &bytes_after, (unsigned char **)&atoms)
      != Success)
    return;

  if (actual_type == XA_ATOM && actual_format == 32)
    for (int i = 0; i < nitems; i++)
      if (XGetSelectionOwner (dpy, atoms[i]))
        {
          im_change_cb ();
          break;
        }

  XFree (atoms);
}
#endif

void rxvt_display::x_cb (ev::io &w, int revents)
{
  flush_ev.start ();
}

void rxvt_display::flush_cb (ev::prepare &w, int revents)
{
  while (XEventsQueued (dpy, QueuedAfterFlush))
    do
      {
        XEvent xev;
        XNextEvent (dpy, &xev);

#ifdef USE_XIM
        if (!XFilterEvent (&xev, None))
          {
            if (xev.type == PropertyNotify
                && xev.xany.window == root
                && xev.xproperty.atom == xa[XA_XIM_SERVERS])
              im_change_check ();
#endif
            if (xev.type == MappingNotify)
              XRefreshKeyboardMapping (&xev.xmapping);

            for (int i = xw.size (); i--; )
              {
                if (!xw[i])
                  xw.erase_unordered (i);
                else if (xw[i]->window == xev.xany.window)
                  xw[i]->call (xev);
              }
#ifdef USE_XIM
          }
#endif
      }
    while (XEventsQueued (dpy, QueuedAlready));

  w.stop ();
}

void rxvt_display::reg (xevent_watcher *w)
{
  if (!w->active)
    {
      xw.push_back (w);
      w->active = xw.size ();
    }
}

void rxvt_display::unreg (xevent_watcher *w)
{
  if (w->active)
    {
      xw[w->active - 1] = 0;
      w->active = 0;
    }
}

void rxvt_display::set_selection_owner (rxvt_term *owner, bool clipboard)
{
  rxvt_term * &cur_owner = !clipboard ? selection_owner : clipboard_owner;

  if (cur_owner && cur_owner != owner)
    {
      rxvt_term *term = cur_owner;
      term->selection_clear (clipboard);
      term->flush ();
    }

  cur_owner = owner;
}

#ifdef USE_XIM

void rxvt_display::reg (im_watcher *w)
{
  imw.push_back (w);
}

void rxvt_display::unreg (im_watcher *w)
{
  imw.erase (find (imw.begin (), imw.end (), w));
}

rxvt_xim *rxvt_display::get_xim (const char *locale, const char *modifiers)
{
  char *id;
  int l, m;

  l = strlen (locale);
  m = strlen (modifiers);

  if (!(id = rxvt_temp_buf<char> (l + m + 2)))
    return 0;

  memcpy (id, locale, l); id[l] = '\n';
  memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;

  rxvt_xim *xim = xims.get (id);

  return xim;
}

void rxvt_display::put_xim (rxvt_xim *xim)
{
# if XLIB_IS_RACEFREE
  xims.put (xim);
# endif
}

#endif

Atom rxvt_display::atom (const char *name)
{
  return XInternAtom (dpy, name, False);
}

/////////////////////////////////////////////////////////////////////////////

template class refcache<rxvt_display>;
refcache<rxvt_display> displays;

/////////////////////////////////////////////////////////////////////////////
//

static unsigned int
insert_component (unsigned int value, unsigned int mask, unsigned int shift)
{
  return (value * (mask + 1) >> 16) << shift;
}

bool
rxvt_color::alloc (rxvt_screen *screen, const rgba &color)
{
  //TODO: only supports 24 bit
  int alpha = color.a >= 0xff00 ? 0xffff : color.a;

#if XFT
  XRenderPictFormat *format;

  // FUCKING Xft gets it wrong, of course, so work around it.
  // Transparency users should eat shit and die, and then
  // XRenderQueryPictIndexValues themselves plenty.
  if ((screen->visual->c_class == TrueColor)
      && (format = XRenderFindVisualFormat (screen->dpy, screen->visual)))
    {
      // the fun lies in doing everything manually...
      c.color.red   = color.r;
      c.color.green = color.g;
      c.color.blue  = color.b;
      c.color.alpha = alpha;

      c.pixel = insert_component (color.r, format->direct.redMask  , format->direct.red  )
              | insert_component (color.g, format->direct.greenMask, format->direct.green)
              | insert_component (color.b, format->direct.blueMask , format->direct.blue )
              | insert_component (alpha  , format->direct.alphaMask, format->direct.alpha);

      return true;
    }
  else
    {
      XRenderColor d;

      d.red   = color.r;
      d.green = color.g;
      d.blue  = color.b;
      d.alpha = alpha;

      return XftColorAllocValue (screen->dpy, screen->visual, screen->cmap, &d, &c);
    }
#else
  c.red   = color.r;
  c.green = color.g;
  c.blue  = color.b;

  if (screen->visual->c_class == TrueColor)
    {
      c.pixel = (color.r >> (16 - rxvt_popcount (screen->visual->red_mask  )) << rxvt_ctz (screen->visual->red_mask  ))
              | (color.g >> (16 - rxvt_popcount (screen->visual->green_mask)) << rxvt_ctz (screen->visual->green_mask))
              | (color.b >> (16 - rxvt_popcount (screen->visual->blue_mask )) << rxvt_ctz (screen->visual->blue_mask ));

      return true;
    }
  else if (XAllocColor (screen->dpy, screen->cmap, &c))
    return true;
  else
    c.pixel = (color.r + color.g + color.b) > 128*3
            ? WhitePixelOfScreen (DefaultScreenOfDisplay (screen->dpy))
            : BlackPixelOfScreen (DefaultScreenOfDisplay (screen->dpy));
#endif

  return false;
}

bool
rxvt_color::set (rxvt_screen *screen, const char *name)
{
  rgba c;
  char eos;
  int skip;

  c.a = rgba::MAX_CC;

  // parse the nonstandard "[alphapercent]" prefix
  if (1 <= sscanf (name, "[%hd]%n", &c.a, &skip))
    {
      c.a = lerp<int, int, int> (0, rgba::MAX_CC, c.a);
      name += skip;
    }

  // parse the non-standard "rgba:rrrr/gggg/bbbb/aaaa" format
  if (strlen (name) != 4+5*4 || 4 != sscanf (name, "rgba:%4hx/%4hx/%4hx/%4hx%c", &c.r, &c.g, &c.b, &c.a, &eos))
    {
      XColor xc;

      if (XParseColor (screen->dpy, screen->cmap, name, &xc))
        {
          c.r = xc.red;
          c.g = xc.green;
          c.b = xc.blue;
        }
      else
        {
          c.r = 0xffff;
          c.g = 0x6969;
          c.b = 0xb4b4;

          rxvt_warn ("unable to parse color '%s', using pink instead.\n", name);
        }
    }

  return set (screen, c);
}

bool
rxvt_color::set (rxvt_screen *screen, const rgba &color)
{
  bool got = alloc (screen, color);

#if !ENABLE_MINIMAL
  int cmap_size = screen->visual->map_entries;

  if (!got
      && screen->visual->c_class == PseudoColor
      && cmap_size < 4096)
    {
      XColor *colors = new XColor [screen->visual->map_entries];

      for (int i = 0; i < cmap_size; i++)
        colors [i].pixel = i;

      // many kilobytes transfer per colour, but pseudocolor isn't worth
      // many extra optimisations.
      XQueryColors (screen->dpy, screen->cmap, colors, cmap_size);

      int diff = 0x7fffffffUL;
      XColor *best = colors;

      for (int i = 0; i < cmap_size; i++)
        {
          int d = (squared_diff<int> (color.r >> 2, colors [i].red   >> 2))
                + (squared_diff<int> (color.g >> 2, colors [i].green >> 2))
                + (squared_diff<int> (color.b >> 2, colors [i].blue  >> 2));

          if (d < diff)
            {
              diff = d;
              best = colors + i;
            }
        }

      //rxvt_warn ("could not allocate %04x %04x %04x, getting %04x %04x %04x instead (%d)\n",
      //    color.r, color.g, color.b, best->red, best->green, best->blue, diff);

      got = alloc (screen, rgba (best->red, best->green, best->blue));

      delete [] colors;
    }
#endif

  return got;
}

void
rxvt_color::get (rgba &color)
{
#if XFT
  color.r = c.color.red;
  color.g = c.color.green;
  color.b = c.color.blue;
  color.a = c.color.alpha;
#else
  color.r = c.red;
  color.g = c.green;
  color.b = c.blue;
  color.a = rgba::MAX_CC;
#endif
}

void
rxvt_color::get (XColor &color)
{
  rgba c;
  get (c);

  color.red   = c.r;
  color.green = c.g;
  color.blue  = c.b;
  color.pixel = (Pixel)*this;
}

void
rxvt_color::free (rxvt_screen *screen)
{
  if (screen->visual->c_class == TrueColor)
    return; // nothing to do

#if XFT
  XftColorFree (screen->dpy, screen->visual, screen->cmap, &c);
#else
  XFreeColors (screen->dpy, screen->cmap, &c.pixel, 1, AllPlanes);
#endif
}

void
rxvt_color::fade (rxvt_screen *screen, int percent, rxvt_color &result, const rgba &to)
{
  rgba c;
  get (c);

  result.set (
    screen,
    rgba (
      lerp (c.r, to.r, percent),
      lerp (c.g, to.g, percent),
      lerp (c.b, to.b, percent),
      lerp (c.a, to.a, percent)
    )
  );
}

Revision:	1.112
Committed:	Thu Dec 30 00:35:29 2010 UTC (13 years, 4 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.111:	+1 -0 lines
Log Message:	Plug leak.
#	Content
1	/----------------------------------------------------------------------
2	* File: rxvttoolkit.C
3	----------------------------------------------------------------------
4	*
5	* All portions of code are copyright by their respective author/s.
6	* Copyright (c) 2003-2007 Marc Lehmann <pcg@goof.com>
7	*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation; either version 2 of the License, or
11	* (at your option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	----------------------------------------------------------------------/
22
23	#include "../config.h"
24	#include <rxvt.h>
25	#include <rxvttoolkit.h>
26
27	#include <unistd.h>
28	#include <fcntl.h>
29
30	#include <sys/utsname.h>
31	#include <sys/socket.h>
32	#include <sys/un.h>
33
34	#if XFT
35	# include <X11/extensions/Xrender.h>
36	#endif
37
38	static const char *const xa_names[] =
39	{
40	"TEXT",
41	"COMPOUND_TEXT",
42	"UTF8_STRING",
43	"MULTIPLE",
44	"TARGETS",
45	"TIMESTAMP",
46	"VT_SELECTION",
47	"INCR",
48	"WM_PROTOCOLS",
49	"WM_DELETE_WINDOW",
50	"CLIPBOARD",
51	"AVERAGE_WIDTH",
52	"WEIGHT_NAME",
53	"SLANT",
54	"CHARSET_REGISTRY",
55	"CHARSET_ENCODING",
56	#if ENABLE_FRILLS
57	"_MOTIF_WM_HINTS",
58	#endif
59	#if ENABLE_EWMH
60	"_NET_WM_PID",
61	"_NET_WM_NAME",
62	"_NET_WM_ICON_NAME",
63	"_NET_WM_PING",
64	"_NET_WM_ICON",
65	#endif
66	#if USE_XIM
67	"WM_LOCALE_NAME",
68	"XIM_SERVERS",
69	#endif
70	#ifdef ENABLE_TRANSPARENCY
71	"_XROOTPMAP_ID",
72	"ESETROOT_PMAP_ID",
73	#endif
74	#if ENABLE_XEMBED
75	"_XEMBED",
76	"_XEMBED_INFO",
77	#endif
78	#if !ENABLE_MINIMAL
79	"SCREEN_RESOURCES",
80	"XDCCC_LINEAR_RGB_CORRECTION",
81	"XDCCC_LINEAR_RGB_MATRICES",
82	"WM_COLORMAP_WINDOWS",
83	"WM_STATE",
84	"cursor",
85	# if USE_XIM
86	"TRANSPORT",
87	"LOCALES",
88	"_XIM_PROTOCOL",
89	"_XIM_XCONNECT",
90	"_XIM_MOREDATA",
91	# endif
92	#endif
93	};
94
95	/////////////////////////////////////////////////////////////////////////////
96
97	refcounted::refcounted (const char *id)
98	{
99	this->id = strdup (id);
100	}
101
102	refcounted::~refcounted ()
103	{
104	free (id);
105	}
106
107	template<class T>
108	T refcache<T>::get (const char id)
109	{
110	for (T **i = this->begin (); i < this->end (); ++i)
111	{
112	if (!strcmp (id, (*i)->id))
113	{
114	++(*i)->referenced;
115	(*i)->ref_next ();
116	return *i;
117	}
118	}
119
120	T *obj = new T (id);
121
122	if (obj && obj->ref_init ())
123	{
124	obj->referenced = 1;
125	this->push_back (obj);
126	return obj;
127	}
128	else
129	{
130	delete obj;
131	return 0;
132	}
133	}
134
135	template<class T>
136	void refcache<T>::put (T *obj)
137	{
138	if (!obj)
139	return;
140
141	if (!--obj->referenced)
142	{
143	this->erase (find (this->begin (), this->end (), obj));
144	delete obj;
145	}
146	}
147
148	template<class T>
149	void refcache<T>::clear ()
150	{
151	while (this->size ())
152	put (*this->begin ());
153	}
154
155	/////////////////////////////////////////////////////////////////////////////
156
157	#ifdef USE_XIM
158
159	static void
160	#if XIMCB_PROTO_BROKEN
161	im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
162	#else
163	im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
164	#endif
165	{
166	rxvt_xim xim = (rxvt_xim )client_data;
167	rxvt_display *display = xim->display;
168
169	xim->xim = 0;
170
171	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
172	display->im_change_cb ();
173	}
174
175	bool
176	rxvt_xim::ref_init ()
177	{
178	display = GET_R->display; //HACK: TODO
179
180	xim = XOpenIM (display->dpy, 0, 0, 0);
181
182	if (!xim)
183	return false;
184
185	XIMCallback ximcallback;
186	ximcallback.client_data = (XPointer)this;
187	ximcallback.callback = im_destroy_cb;
188
189	XSetIMValues (xim, XNDestroyCallback, &ximcallback, (char *)0);
190
191	return true;
192	}
193
194	rxvt_xim::~rxvt_xim ()
195	{
196	if (xim)
197	XCloseIM (xim);
198	}
199
200	#endif
201
202	/////////////////////////////////////////////////////////////////////////////
203
204	#if XFT
205	rxvt_drawable::~rxvt_drawable ()
206	{
207	if (xftdrawable)
208	XftDrawDestroy (xftdrawable);
209	}
210
211	rxvt_drawable::operator XftDraw *()
212	{
213	if (!xftdrawable)
214	xftdrawable = XftDrawCreate (screen->dpy, drawable, screen->visual, screen->cmap);
215
216	return xftdrawable;
217	}
218	#endif
219
220	/////////////////////////////////////////////////////////////////////////////
221
222	#if XFT
223
224	// not strictly necessary as it is only used with superclass of zero_initialised
225	rxvt_screen::rxvt_screen ()
226	: scratch_area (0)
227	{
228	}
229
230	rxvt_drawable &rxvt_screen::scratch_drawable (int w, int h)
231	{
232	// it's actually faster to re-allocate every time. don't ask me
233	// why, but its likely no big deal there are no roundtrips
234	// (I think/hope).
235	if (!scratch_area \|\| w > scratch_w \|\| h > scratch_h \|\| 1/D/)
236	{
237	if (scratch_area)
238	{
239	XFreePixmap (dpy, scratch_area->drawable);
240	delete scratch_area;
241	}
242
243	Pixmap pm = XCreatePixmap (dpy, RootWindowOfScreen (ScreenOfDisplay (dpy, display->screen)),
244	scratch_w = w, scratch_h = h, depth);
245
246	scratch_area = new rxvt_drawable (this, pm);
247	}
248
249	return *scratch_area;
250	}
251
252	#endif
253
254	void
255	rxvt_screen::set (rxvt_display *disp)
256	{
257	display = disp;
258	dpy = disp->dpy;
259
260	Screen *screen = ScreenOfDisplay (dpy, disp->screen);
261
262	depth = DefaultDepthOfScreen (screen);
263	visual = DefaultVisualOfScreen (screen);
264	cmap = DefaultColormapOfScreen (screen);
265	}
266
267	void
268	rxvt_screen::select_visual (int bitdepth)
269	{
270	#if XFT
271	XVisualInfo vinfo;
272
273	if (XMatchVisualInfo (dpy, display->screen, bitdepth, TrueColor, &vinfo))
274	{
275	depth = bitdepth;
276	visual = vinfo.visual;
277	cmap = XCreateColormap (dpy, display->root, visual, AllocNone);
278	}
279	#endif
280	}
281
282	void
283	rxvt_screen::clear ()
284	{
285	#if XFT
286	if (scratch_area)
287	{
288	XFreePixmap (dpy, scratch_area->drawable);
289	delete scratch_area;
290	}
291	#endif
292
293	if (cmap != DefaultColormapOfScreen (ScreenOfDisplay (dpy, display->screen)))
294	XFreeColormap (dpy, cmap);
295	}
296
297	/////////////////////////////////////////////////////////////////////////////
298
299	rxvt_display::rxvt_display (const char *id)
300	: refcounted (id)
301	, selection_owner (0)
302	, clipboard_owner (0)
303	{
304	x_ev .set<rxvt_display, &rxvt_display::x_cb > (this);
305	flush_ev.set<rxvt_display, &rxvt_display::flush_cb> (this);
306	}
307
308	XrmDatabase
309	rxvt_display::get_resources (bool refresh)
310	{
311	char *homedir = getenv ("HOME");
312	char fname[1024];
313
314	/*
315	* get resources using the X library function
316	*/
317	char displayResource, xe;
318	XrmDatabase rdb1, database = 0;
319
320	// for ordering, see for example http://www.faqs.org/faqs/Xt-FAQ/ Subject: 20
321	// as opposed to "standard practise", we always read in ~/.Xdefaults
322
323	// 6. System wide per application default file.
324
325	/* Add in $XAPPLRESDIR/Rxvt only; not bothering with XUSERFILESEARCHPATH */
326	if ((xe = getenv ("XAPPLRESDIR")))
327	{
328	snprintf (fname, sizeof (fname), "%s/%s", xe, RESCLASS);
329
330	if ((rdb1 = XrmGetFileDatabase (fname)))
331	XrmMergeDatabases (rdb1, &database);
332	}
333
334	// 5. User's per application default file.
335	// none
336
337	// 4. User's defaults file.
338	if (homedir)
339	{
340	snprintf (fname, sizeof (fname), "%s/.Xdefaults", homedir);
341
342	if ((rdb1 = XrmGetFileDatabase (fname)))
343	XrmMergeDatabases (rdb1, &database);
344	}
345
346	/* Get any Xserver defaults */
347	if (refresh)
348	{
349	// fucking xlib keeps a copy of the rm string
350	Atom actual_type;
351	int actual_format;
352	unsigned long nitems, nremaining;
353	char *val = 0;
354
355	#if XLIB_ILLEGAL_ACCESS
356	if (dpy->xdefaults)
357	XFree (dpy->xdefaults);
358	#endif
359
360	if (XGetWindowProperty (dpy, RootWindow (dpy, 0), XA_RESOURCE_MANAGER,
361	0L, 100000000L, False,
362	XA_STRING, &actual_type, &actual_format,
363	&nitems, &nremaining,
364	(unsigned char **)&val) == Success
365	&& actual_type == XA_STRING
366	&& actual_format == 8)
367	displayResource = val;
368	else
369	{
370	displayResource = 0;
371
372	if (val)
373	XFree (val);
374	}
375
376	#if XLIB_ILLEGAL_ACCESS
377	dpy->xdefaults = displayResource;
378	#endif
379	}
380	else
381	displayResource = XResourceManagerString (dpy);
382
383	if (displayResource)
384	{
385	if ((rdb1 = XrmGetStringDatabase (displayResource)))
386	XrmMergeDatabases (rdb1, &database);
387	}
388
389	#if !XLIB_ILLEGAL_ACCESS
390	if (refresh && displayResource)
391	XFree (displayResource);
392	#endif
393
394	/* Get screen specific resources */
395	displayResource = XScreenResourceString (ScreenOfDisplay (dpy, screen));
396
397	if (displayResource)
398	{
399	if ((rdb1 = XrmGetStringDatabase (displayResource)))
400	/* Merge with screen-independent resources */
401	XrmMergeDatabases (rdb1, &database);
402
403	XFree (displayResource);
404	}
405
406	// 3. User's per host defaults file
407	/* Add in XENVIRONMENT file */
408	if ((xe = getenv ("XENVIRONMENT"))
409	&& (rdb1 = XrmGetFileDatabase (xe)))
410	XrmMergeDatabases (rdb1, &database);
411	else if (homedir)
412	{
413	struct utsname un;
414
415	if (!uname (&un))
416	{
417	snprintf (fname, sizeof (fname), "%s/.Xdefaults-%s", homedir, un.nodename);
418
419	if ((rdb1 = XrmGetFileDatabase (fname)))
420	XrmMergeDatabases (rdb1, &database);
421	}
422	}
423
424	return database;
425	}
426
427	bool rxvt_display::ref_init ()
428	{
429	#ifdef LOCAL_X_IS_UNIX
430	if (id[0] == ':')
431	{
432	if (!(val = rxvt_temp_buf<char> (5 + strlen (id) + 1)))
433	return false;
434	strcpy (val, "unix/");
435	strcat (val, id);
436	dpy = XOpenDisplay (val);
437	}
438	else
439	#endif
440	dpy = 0;
441
442	if (!dpy)
443	dpy = XOpenDisplay (id);
444
445	if (!dpy)
446	return false;
447
448	screen = DefaultScreen (dpy);
449	root = DefaultRootWindow (dpy);
450
451	assert (ARRAY_LENGTH(xa_names) == NUM_XA);
452	XInternAtoms (dpy, (char **)xa_names, NUM_XA, False, xa);
453
454	XrmSetDatabase (dpy, get_resources (false));
455
456	#ifdef POINTER_BLANK
457	XColor blackcolour;
458	blackcolour.red = 0;
459	blackcolour.green = 0;
460	blackcolour.blue = 0;
461	Font f = XLoadFont (dpy, "fixed");
462	blank_cursor = XCreateGlyphCursor (dpy, f, f, ' ', ' ',
463	&blackcolour, &blackcolour);
464	XUnloadFont (dpy, f);
465	#endif
466
467	int fd = XConnectionNumber (dpy);
468
469	// try to detect whether we have a local connection.
470	// assume unix domain socket == local, everything else not
471	// TODO: might want to check for inet/127.0.0.1
472	is_local = 0;
473	sockaddr_un sa;
474	socklen_t sl = sizeof (sa);
475
476	if (!getsockname (fd, (sockaddr *)&sa, &sl))
477	is_local = sa.sun_family == AF_UNIX;
478
479	flush_ev.start ();
480	x_ev.start (fd, ev::READ);
481	fcntl (fd, F_SETFD, FD_CLOEXEC);
482
483	XSelectInput (dpy, root, PropertyChangeMask);
484
485	flush ();
486
487	return true;
488	}
489
490	void
491	rxvt_display::ref_next ()
492	{
493	// TODO: somehow check whether the database files/resources changed
494	// before affording re-loading/parsing
495	XrmDestroyDatabase (XrmGetDatabase (dpy));
496	XrmSetDatabase (dpy, get_resources (true));
497	}
498
499	rxvt_display::~rxvt_display ()
500	{
501	if (!dpy)
502	return;
503
504	#ifdef POINTER_BLANK
505	XFreeCursor (dpy, blank_cursor);
506	#endif
507	x_ev.stop ();
508	flush_ev.stop ();
509	#ifdef USE_XIM
510	xims.clear ();
511	#endif
512	XrmDestroyDatabase (XrmGetDatabase (dpy));
513	XCloseDisplay (dpy);
514	}
515
516	#ifdef USE_XIM
517	void rxvt_display::im_change_cb ()
518	{
519	for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
520	(*i)->call ();
521	}
522
523	void rxvt_display::im_change_check ()
524	{
525	// try to only call im_change_cb when a new input method
526	// registers, as xlib crashes due to a race otherwise.
527	Atom actual_type, *atoms;
528	int actual_format;
529	unsigned long nitems, bytes_after;
530
531	if (XGetWindowProperty (dpy, root, xa[XA_XIM_SERVERS], 0L, 1000000L,
532	False, XA_ATOM, &actual_type, &actual_format,
533	&nitems, &bytes_after, (unsigned char **)&atoms)
534	!= Success)
535	return;
536
537	if (actual_type == XA_ATOM && actual_format == 32)
538	for (int i = 0; i < nitems; i++)
539	if (XGetSelectionOwner (dpy, atoms[i]))
540	{
541	im_change_cb ();
542	break;
543	}
544
545	XFree (atoms);
546	}
547	#endif
548
549	void rxvt_display::x_cb (ev::io &w, int revents)
550	{
551	flush_ev.start ();
552	}
553
554	void rxvt_display::flush_cb (ev::prepare &w, int revents)
555	{
556	while (XEventsQueued (dpy, QueuedAfterFlush))
557	do
558	{
559	XEvent xev;
560	XNextEvent (dpy, &xev);
561
562	#ifdef USE_XIM
563	if (!XFilterEvent (&xev, None))
564	{
565	if (xev.type == PropertyNotify
566	&& xev.xany.window == root
567	&& xev.xproperty.atom == xa[XA_XIM_SERVERS])
568	im_change_check ();
569	#endif
570	if (xev.type == MappingNotify)
571	XRefreshKeyboardMapping (&xev.xmapping);
572
573	for (int i = xw.size (); i--; )
574	{
575	if (!xw[i])
576	xw.erase_unordered (i);
577	else if (xw[i]->window == xev.xany.window)
578	xw[i]->call (xev);
579	}
580	#ifdef USE_XIM
581	}
582	#endif
583	}
584	while (XEventsQueued (dpy, QueuedAlready));
585
586	w.stop ();
587	}
588
589	void rxvt_display::reg (xevent_watcher *w)
590	{
591	if (!w->active)
592	{
593	xw.push_back (w);
594	w->active = xw.size ();
595	}
596	}
597
598	void rxvt_display::unreg (xevent_watcher *w)
599	{
600	if (w->active)
601	{
602	xw[w->active - 1] = 0;
603	w->active = 0;
604	}
605	}
606
607	void rxvt_display::set_selection_owner (rxvt_term *owner, bool clipboard)
608	{
609	rxvt_term * &cur_owner = !clipboard ? selection_owner : clipboard_owner;
610
611	if (cur_owner && cur_owner != owner)
612	{
613	rxvt_term *term = cur_owner;
614	term->selection_clear (clipboard);
615	term->flush ();
616	}
617
618	cur_owner = owner;
619	}
620
621	#ifdef USE_XIM
622
623	void rxvt_display::reg (im_watcher *w)
624	{
625	imw.push_back (w);
626	}
627
628	void rxvt_display::unreg (im_watcher *w)
629	{
630	imw.erase (find (imw.begin (), imw.end (), w));
631	}
632
633	rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
634	{
635	char *id;
636	int l, m;
637
638	l = strlen (locale);
639	m = strlen (modifiers);
640
641	if (!(id = rxvt_temp_buf<char> (l + m + 2)))
642	return 0;
643
644	memcpy (id, locale, l); id[l] = '\n';
645	memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
646
647	rxvt_xim *xim = xims.get (id);
648
649	return xim;
650	}
651
652	void rxvt_display::put_xim (rxvt_xim *xim)
653	{
654	# if XLIB_IS_RACEFREE
655	xims.put (xim);
656	# endif
657	}
658
659	#endif
660
661	Atom rxvt_display::atom (const char *name)
662	{
663	return XInternAtom (dpy, name, False);
664	}
665
666	/////////////////////////////////////////////////////////////////////////////
667
668	template class refcache<rxvt_display>;
669	refcache<rxvt_display> displays;
670
671	/////////////////////////////////////////////////////////////////////////////
672	//
673
674	static unsigned int
675	insert_component (unsigned int value, unsigned int mask, unsigned int shift)
676	{
677	return (value * (mask + 1) >> 16) << shift;
678	}
679
680	bool
681	rxvt_color::alloc (rxvt_screen *screen, const rgba &color)
682	{
683	//TODO: only supports 24 bit
684	int alpha = color.a >= 0xff00 ? 0xffff : color.a;
685
686	#if XFT
687	XRenderPictFormat *format;
688
689	// FUCKING Xft gets it wrong, of course, so work around it.
690	// Transparency users should eat shit and die, and then
691	// XRenderQueryPictIndexValues themselves plenty.
692	if ((screen->visual->c_class == TrueColor)
693	&& (format = XRenderFindVisualFormat (screen->dpy, screen->visual)))
694	{
695	// the fun lies in doing everything manually...
696	c.color.red = color.r;
697	c.color.green = color.g;
698	c.color.blue = color.b;
699	c.color.alpha = alpha;
700
701	c.pixel = insert_component (color.r, format->direct.redMask , format->direct.red )
702	\| insert_component (color.g, format->direct.greenMask, format->direct.green)
703	\| insert_component (color.b, format->direct.blueMask , format->direct.blue )
704	\| insert_component (alpha , format->direct.alphaMask, format->direct.alpha);
705
706	return true;
707	}
708	else
709	{
710	XRenderColor d;
711
712	d.red = color.r;
713	d.green = color.g;
714	d.blue = color.b;
715	d.alpha = alpha;
716
717	return XftColorAllocValue (screen->dpy, screen->visual, screen->cmap, &d, &c);
718	}
719	#else
720	c.red = color.r;
721	c.green = color.g;
722	c.blue = color.b;
723
724	if (screen->visual->c_class == TrueColor)
725	{
726	c.pixel = (color.r >> (16 - rxvt_popcount (screen->visual->red_mask )) << rxvt_ctz (screen->visual->red_mask ))
727	\| (color.g >> (16 - rxvt_popcount (screen->visual->green_mask)) << rxvt_ctz (screen->visual->green_mask))
728	\| (color.b >> (16 - rxvt_popcount (screen->visual->blue_mask )) << rxvt_ctz (screen->visual->blue_mask ));
729
730	return true;
731	}
732	else if (XAllocColor (screen->dpy, screen->cmap, &c))
733	return true;
734	else
735	c.pixel = (color.r + color.g + color.b) > 128*3
736	? WhitePixelOfScreen (DefaultScreenOfDisplay (screen->dpy))
737	: BlackPixelOfScreen (DefaultScreenOfDisplay (screen->dpy));
738	#endif
739
740	return false;
741	}
742
743	bool
744	rxvt_color::set (rxvt_screen screen, const char name)
745	{
746	rgba c;
747	char eos;
748	int skip;
749
750	c.a = rgba::MAX_CC;
751
752	// parse the nonstandard "[alphapercent]" prefix
753	if (1 <= sscanf (name, "[%hd]%n", &c.a, &skip))
754	{
755	c.a = lerp<int, int, int> (0, rgba::MAX_CC, c.a);
756	name += skip;
757	}
758
759	// parse the non-standard "rgba:rrrr/gggg/bbbb/aaaa" format
760	if (strlen (name) != 4+5*4 \|\| 4 != sscanf (name, "rgba:%4hx/%4hx/%4hx/%4hx%c", &c.r, &c.g, &c.b, &c.a, &eos))
761	{
762	XColor xc;
763
764	if (XParseColor (screen->dpy, screen->cmap, name, &xc))
765	{
766	c.r = xc.red;
767	c.g = xc.green;
768	c.b = xc.blue;
769	}
770	else
771	{
772	c.r = 0xffff;
773	c.g = 0x6969;
774	c.b = 0xb4b4;
775
776	rxvt_warn ("unable to parse color '%s', using pink instead.\n", name);
777	}
778	}
779
780	return set (screen, c);
781	}
782
783	bool
784	rxvt_color::set (rxvt_screen *screen, const rgba &color)
785	{
786	bool got = alloc (screen, color);
787
788	#if !ENABLE_MINIMAL
789	int cmap_size = screen->visual->map_entries;
790
791	if (!got
792	&& screen->visual->c_class == PseudoColor
793	&& cmap_size < 4096)
794	{
795	XColor *colors = new XColor [screen->visual->map_entries];
796
797	for (int i = 0; i < cmap_size; i++)
798	colors [i].pixel = i;
799
800	// many kilobytes transfer per colour, but pseudocolor isn't worth
801	// many extra optimisations.
802	XQueryColors (screen->dpy, screen->cmap, colors, cmap_size);
803
804	int diff = 0x7fffffffUL;
805	XColor *best = colors;
806
807	for (int i = 0; i < cmap_size; i++)
808	{
809	int d = (squared_diff<int> (color.r >> 2, colors [i].red >> 2))
810	+ (squared_diff<int> (color.g >> 2, colors [i].green >> 2))
811	+ (squared_diff<int> (color.b >> 2, colors [i].blue >> 2));
812
813	if (d < diff)
814	{
815	diff = d;
816	best = colors + i;
817	}
818	}
819
820	//rxvt_warn ("could not allocate %04x %04x %04x, getting %04x %04x %04x instead (%d)\n",
821	// color.r, color.g, color.b, best->red, best->green, best->blue, diff);
822
823	got = alloc (screen, rgba (best->red, best->green, best->blue));
824
825	delete [] colors;
826	}
827	#endif
828
829	return got;
830	}
831
832	void
833	rxvt_color::get (rgba &color)
834	{
835	#if XFT
836	color.r = c.color.red;
837	color.g = c.color.green;
838	color.b = c.color.blue;
839	color.a = c.color.alpha;
840	#else
841	color.r = c.red;
842	color.g = c.green;
843	color.b = c.blue;
844	color.a = rgba::MAX_CC;
845	#endif
846	}
847
848	void
849	rxvt_color::get (XColor &color)
850	{
851	rgba c;
852	get (c);
853
854	color.red = c.r;
855	color.green = c.g;
856	color.blue = c.b;
857	color.pixel = (Pixel)*this;
858	}
859
860	void
861	rxvt_color::free (rxvt_screen *screen)
862	{
863	if (screen->visual->c_class == TrueColor)
864	return; // nothing to do
865
866	#if XFT
867	XftColorFree (screen->dpy, screen->visual, screen->cmap, &c);
868	#else
869	XFreeColors (screen->dpy, screen->cmap, &c.pixel, 1, AllPlanes);
870	#endif
871	}
872
873	void
874	rxvt_color::fade (rxvt_screen *screen, int percent, rxvt_color &result, const rgba &to)
875	{
876	rgba c;
877	get (c);
878
879	result.set (
880	screen,
881	rgba (
882	lerp (c.r, to.r, percent),
883	lerp (c.g, to.g, percent),
884	lerp (c.b, to.b, percent),
885	lerp (c.a, to.a, percent)
886	)
887	);
888	}
889