rxvt-unicode/src/rxvttoolkit.C

/*--------------------------------*-C-*---------------------------------*
 * File:        rxvttoolkit.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2003-2004 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>

#ifndef NO_SLOW_LINK_SUPPORT
# include <sys/socket.h>
# include <sys/un.h>
#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++;
          return *i;
        }
    }

  T *obj = new T (id);

  obj->referenced = 1;

  if (obj && obj->init ())
    {
      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::init ()
{
  display = GET_R->display; //HACK: TODO

  xim = XOpenIM (display->display, NULL, NULL, NULL);

  if (!xim)
    return false;

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

  XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);

  return true;
}

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

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

rxvt_display::rxvt_display (const char *id)
: refcounted (id)
, x_ev (this, &rxvt_display::x_cb)
, selection_owner (0)
{
}

bool rxvt_display::init ()
{
#ifdef LOCAL_X_IS_UNIX
  if (id[0] == ':')
    {
      val = rxvt_malloc (5 + strlen (id) + 1);
      strcpy (val, "unix/");
      strcat (val, id);
      display = XOpenDisplay (val);
      free (val);
    }
  else
#endif
    display = 0;

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

  if (!display)
    return false;

  screen = DefaultScreen (display);
  root   = DefaultRootWindow (display);
  visual = DefaultVisual (display, screen);
  cmap   = DefaultColormap (display, screen);
  depth  = DefaultDepth (display, screen);

  int fd = XConnectionNumber (display);

#ifndef NO_SLOW_LINK_SUPPORT
  // try to detect wether we have a local connection.
  // assume unix domains 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_LOCAL;
#endif

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

#ifdef PREFER_24BIT
  /*
   * If depth is not 24, look for a 24bit visual.
   */
  if (depth != 24)
    {
      XVisualInfo vinfo;

      if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
        {
          depth = 24;
          visual = vinfo.visual;
          cmap = XCreateColormap (display,
                                  RootWindow (display, screen),
                                  visual, AllocNone);
        }
    }
#endif

  x_ev.start (fd, EVENT_READ);
  fcntl (fd, F_SETFD, FD_CLOEXEC);

  XSelectInput (display, root, PropertyChangeMask);
#ifdef USE_XIM
  xa_xim_servers = XInternAtom (display, "XIM_SERVERS", 0);
#endif

  flush ();

  return true;
}

rxvt_display::~rxvt_display ()
{
#ifdef POINTER_BLANK
  XFreeCursor (display, blank_cursor);
#endif
  x_ev.stop ();
#ifdef USE_XIM
  xims.clear ();
#endif

  if (display)
    XCloseDisplay (display);
}

#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 (display, root, 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 (display, atoms[i]))
        {
          im_change_cb ();
          break;
        }

  XFree (atoms);
}
#endif

void rxvt_display::x_cb (io_watcher &w, short revents)
{
  do
    {
      XEvent xev;
      XNextEvent (display, &xev);

#ifdef USE_XIM
      if (!XFilterEvent (&xev, None))
        {
          if (xev.type == PropertyNotify
              && xev.xany.window == root
              && xev.xproperty.atom == xa_xim_servers)
            im_change_check ();
#endif
          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 (display, QueuedAlready));

  XFlush (display);
}

void rxvt_display::flush ()
{
  if (XEventsQueued (display, QueuedAlready))
    x_cb (x_ev, EVENT_READ);

  XFlush (display);
}

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

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

void rxvt_display::set_selection_owner (rxvt_term *owner)
{
  if (selection_owner && selection_owner != owner)
    selection_owner->selection_clear ();

  selection_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 = (char *)malloc (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);

  free (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 (display, name, False);
}

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

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

/////////////////////////////////////////////////////////////////////////////
  
bool
rxvt_color::set (rxvt_display *display, Pixel p)
{
#if XFT
  XColor xc;

  xc.pixel = p;
  if (!XQueryColor (display->display, display->cmap, &xc))
    return false;

  XRenderColor d;

  d.red   = xc.red;
  d.green = xc.green;
  d.blue  = xc.blue;
  d.alpha = 0xffff;

  return
    XftColorAllocValue (display->display, 
                        display->visual,
                        display->cmap,
                        &d, &c);
#else
  this->p = p;
#endif

  return true;
}

bool
rxvt_color::set (rxvt_display *display, const char *name)
{
#if XFT
  return XftColorAllocName (display->display, display->visual, display->cmap,
                            name, &c);
#else
  XColor xc;

  if (XParseColor (display->display, display->cmap, name, &xc))
    return set (display, xc.red, xc.green, xc.blue);

  return false;
#endif
}

bool
rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
{
  XColor xc;

  xc.red   = cr;
  xc.green = cg;
  xc.blue  = cb;
  xc.flags = DoRed | DoGreen | DoBlue;

  if (XAllocColor (display->display, display->cmap, &xc))
    return set (display, xc.pixel);

  return false;
}

void 
rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
{
#if XFT
  cr = c.color.red;
  cg = c.color.green;
  cb = c.color.blue;
#else
  XColor c;

  c.pixel = p;
  XQueryColor (display->display, display->cmap, &c);

  cr = c.red;
  cg = c.green;
  cb = c.blue;
#endif
}

void 
rxvt_color::free (rxvt_display *display)
{
#if XFT
  XftColorFree (display->display, display->visual, display->cmap, &c);
#else
  XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
#endif
}

rxvt_color
rxvt_color::fade (rxvt_display *display, int percent)
{
  percent = 100 - percent;

  unsigned short cr, cg, cb;
  rxvt_color faded;

  get (display, cr, cg, cb);

  faded.set (
    display,
    cr * percent / 100,
    cg * percent / 100,
    cb * percent / 100
  );

  return faded;
}

#define LERP(a,b,p) (a * p + b * (100 - p)) / 100

rxvt_color
rxvt_color::fade (rxvt_display *display, int percent, rxvt_color &fadeto)
{
  percent = 100 - percent;

  unsigned short cr, cg, cb;
  unsigned short fcr, fcg, fcb;
  rxvt_color faded;
  
  get (display, cr, cg, cb);
  fadeto.get(display, fcr, fcg, fcb);

  faded.set (
    display,
    LERP (cr, fcr, percent),
    LERP (cg, fcg, percent),
    LERP (cb, fcb, percent)
  );

  return faded;
}

Revision:	1.21
Committed:	Sun Jan 8 07:55:36 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.20:	+3 -0 lines
Log Message:	* empty log message *
#	Content
1	/---------------------------------C----------------------------------
2	* File: rxvttoolkit.C
3	----------------------------------------------------------------------
4	*
5	* All portions of code are copyright by their respective author/s.
6	* Copyright (c) 2003-2004 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	#ifndef NO_SLOW_LINK_SUPPORT
31	# include <sys/socket.h>
32	# include <sys/un.h>
33	#endif
34
35	refcounted::refcounted (const char *id)
36	{
37	this->id = strdup (id);
38	}
39
40	refcounted::~refcounted ()
41	{
42	free (id);
43	}
44
45	template<class T>
46	T refcache<T>::get (const char id)
47	{
48	for (T **i = this->begin (); i < this->end (); ++i)
49	{
50	if (!strcmp (id, (*i)->id))
51	{
52	(*i)->referenced++;
53	return *i;
54	}
55	}
56
57	T *obj = new T (id);
58
59	obj->referenced = 1;
60
61	if (obj && obj->init ())
62	{
63	this->push_back (obj);
64	return obj;
65	}
66	else
67	{
68	delete obj;
69	return 0;
70	}
71	}
72
73	template<class T>
74	void refcache<T>::put (T *obj)
75	{
76	if (!obj)
77	return;
78
79	if (!--obj->referenced)
80	{
81	this->erase (find (this->begin (), this->end (), obj));
82	delete obj;
83	}
84	}
85
86	template<class T>
87	void refcache<T>::clear ()
88	{
89	while (this->size ())
90	put (*this->begin ());
91	}
92
93	/////////////////////////////////////////////////////////////////////////////
94
95	#ifdef USE_XIM
96	static void
97	#if XIMCB_PROTO_BROKEN
98	im_destroy_cb (XIC unused1, XPointer client_data, XPointer unused3)
99	#else
100	im_destroy_cb (XIM unused1, XPointer client_data, XPointer unused3)
101	#endif
102	{
103	rxvt_xim xim = (rxvt_xim )client_data;
104	rxvt_display *display = xim->display;
105
106	xim->xim = 0;
107
108	display->xims.erase (find (display->xims.begin (), display->xims.end (), xim));
109	display->im_change_cb ();
110	}
111
112	bool rxvt_xim::init ()
113	{
114	display = GET_R->display; //HACK: TODO
115
116	xim = XOpenIM (display->display, NULL, NULL, NULL);
117
118	if (!xim)
119	return false;
120
121	XIMCallback ximcallback;
122	ximcallback.client_data = (XPointer)this;
123	ximcallback.callback = im_destroy_cb;
124
125	XSetIMValues (xim, XNDestroyCallback, &ximcallback, NULL);
126
127	return true;
128	}
129
130	rxvt_xim::~rxvt_xim ()
131	{
132	if (xim)
133	XCloseIM (xim);
134	}
135	#endif
136
137	/////////////////////////////////////////////////////////////////////////////
138
139	rxvt_display::rxvt_display (const char *id)
140	: refcounted (id)
141	, x_ev (this, &rxvt_display::x_cb)
142	, selection_owner (0)
143	{
144	}
145
146	bool rxvt_display::init ()
147	{
148	#ifdef LOCAL_X_IS_UNIX
149	if (id[0] == ':')
150	{
151	val = rxvt_malloc (5 + strlen (id) + 1);
152	strcpy (val, "unix/");
153	strcat (val, id);
154	display = XOpenDisplay (val);
155	free (val);
156	}
157	else
158	#endif
159	display = 0;
160
161	if (!display)
162	display = XOpenDisplay (id);
163
164	if (!display)
165	return false;
166
167	screen = DefaultScreen (display);
168	root = DefaultRootWindow (display);
169	visual = DefaultVisual (display, screen);
170	cmap = DefaultColormap (display, screen);
171	depth = DefaultDepth (display, screen);
172
173	int fd = XConnectionNumber (display);
174
175	#ifndef NO_SLOW_LINK_SUPPORT
176	// try to detect wether we have a local connection.
177	// assume unix domains socket == local, everything else not
178	// TODO: might want to check for inet/127.0.0.1
179	is_local = 0;
180	sockaddr_un sa;
181	socklen_t sl = sizeof (sa);
182
183	if (!getsockname (fd, (sockaddr *)&sa, &sl))
184	is_local = sa.sun_family == AF_LOCAL;
185	#endif
186
187	#ifdef POINTER_BLANK
188	XColor blackcolour;
189	blackcolour.red = 0;
190	blackcolour.green = 0;
191	blackcolour.blue = 0;
192	Font f = XLoadFont (display, "fixed");
193	blank_cursor = XCreateGlyphCursor (display, f, f, ' ', ' ',
194	&blackcolour, &blackcolour);
195	XUnloadFont (display, f);
196	#endif
197
198	#ifdef PREFER_24BIT
199	/*
200	* If depth is not 24, look for a 24bit visual.
201	*/
202	if (depth != 24)
203	{
204	XVisualInfo vinfo;
205
206	if (XMatchVisualInfo (display, screen, 24, TrueColor, &vinfo))
207	{
208	depth = 24;
209	visual = vinfo.visual;
210	cmap = XCreateColormap (display,
211	RootWindow (display, screen),
212	visual, AllocNone);
213	}
214	}
215	#endif
216
217	x_ev.start (fd, EVENT_READ);
218	fcntl (fd, F_SETFD, FD_CLOEXEC);
219
220	XSelectInput (display, root, PropertyChangeMask);
221	#ifdef USE_XIM
222	xa_xim_servers = XInternAtom (display, "XIM_SERVERS", 0);
223	#endif
224
225	flush ();
226
227	return true;
228	}
229
230	rxvt_display::~rxvt_display ()
231	{
232	#ifdef POINTER_BLANK
233	XFreeCursor (display, blank_cursor);
234	#endif
235	x_ev.stop ();
236	#ifdef USE_XIM
237	xims.clear ();
238	#endif
239
240	if (display)
241	XCloseDisplay (display);
242	}
243
244	#ifdef USE_XIM
245	void rxvt_display::im_change_cb ()
246	{
247	for (im_watcher **i = imw.begin (); i != imw.end (); ++i)
248	(*i)->call ();
249	}
250
251	void rxvt_display::im_change_check ()
252	{
253	// try to only call im_change_cb when a new input method
254	// registers, as xlib crashes due to a race otherwise.
255	Atom actual_type, *atoms;
256	int actual_format;
257	unsigned long nitems, bytes_after;
258
259	if (XGetWindowProperty (display, root, xa_xim_servers, 0L, 1000000L,
260	False, XA_ATOM, &actual_type, &actual_format,
261	&nitems, &bytes_after, (unsigned char **)&atoms)
262	!= Success )
263	return;
264
265	if (actual_type == XA_ATOM && actual_format == 32)
266	for (int i = 0; i < nitems; i++)
267	if (XGetSelectionOwner (display, atoms[i]))
268	{
269	im_change_cb ();
270	break;
271	}
272
273	XFree (atoms);
274	}
275	#endif
276
277	void rxvt_display::x_cb (io_watcher &w, short revents)
278	{
279	do
280	{
281	XEvent xev;
282	XNextEvent (display, &xev);
283
284	#ifdef USE_XIM
285	if (!XFilterEvent (&xev, None))
286	{
287	if (xev.type == PropertyNotify
288	&& xev.xany.window == root
289	&& xev.xproperty.atom == xa_xim_servers)
290	im_change_check ();
291	#endif
292	for (int i = xw.size (); i--; )
293	{
294	if (!xw[i])
295	xw.erase_unordered (i);
296	else if (xw[i]->window == xev.xany.window)
297	xw[i]->call (xev);
298	}
299	#ifdef USE_XIM
300	}
301	#endif
302	}
303	while (XEventsQueued (display, QueuedAlready));
304
305	XFlush (display);
306	}
307
308	void rxvt_display::flush ()
309	{
310	if (XEventsQueued (display, QueuedAlready))
311	x_cb (x_ev, EVENT_READ);
312
313	XFlush (display);
314	}
315
316	void rxvt_display::reg (xevent_watcher *w)
317	{
318	xw.push_back (w);
319	w->active = xw.size ();
320	}
321
322	void rxvt_display::unreg (xevent_watcher *w)
323	{
324	if (w->active)
325	xw[w->active - 1] = 0;
326	}
327
328	void rxvt_display::set_selection_owner (rxvt_term *owner)
329	{
330	if (selection_owner && selection_owner != owner)
331	selection_owner->selection_clear ();
332
333	selection_owner = owner;
334	}
335
336	#ifdef USE_XIM
337	void rxvt_display::reg (im_watcher *w)
338	{
339	imw.push_back (w);
340	}
341
342	void rxvt_display::unreg (im_watcher *w)
343	{
344	imw.erase (find (imw.begin (), imw.end (), w));
345	}
346
347	rxvt_xim rxvt_display::get_xim (const char locale, const char *modifiers)
348	{
349	char *id;
350	int l, m;
351
352	l = strlen (locale);
353	m = strlen (modifiers);
354
355	if (!(id = (char *)malloc (l + m + 2)))
356	return 0;
357
358	memcpy (id, locale, l); id[l] = '\n';
359	memcpy (id + l + 1, modifiers, m); id[l + m + 1] = 0;
360
361	rxvt_xim *xim = xims.get (id);
362
363	free (id);
364
365	return xim;
366	}
367
368	void rxvt_display::put_xim (rxvt_xim *xim)
369	{
370	#if XLIB_IS_RACEFREE
371	xims.put (xim);
372	#endif
373	}
374	#endif
375
376	Atom rxvt_display::atom (const char *name)
377	{
378	return XInternAtom (display, name, False);
379	}
380
381	/////////////////////////////////////////////////////////////////////////////
382
383	template class refcache<rxvt_display>;
384	refcache<rxvt_display> displays;
385
386	/////////////////////////////////////////////////////////////////////////////
387
388	bool
389	rxvt_color::set (rxvt_display *display, Pixel p)
390	{
391	#if XFT
392	XColor xc;
393
394	xc.pixel = p;
395	if (!XQueryColor (display->display, display->cmap, &xc))
396	return false;
397
398	XRenderColor d;
399
400	d.red = xc.red;
401	d.green = xc.green;
402	d.blue = xc.blue;
403	d.alpha = 0xffff;
404
405	return
406	XftColorAllocValue (display->display,
407	display->visual,
408	display->cmap,
409	&d, &c);
410	#else
411	this->p = p;
412	#endif
413
414	return true;
415	}
416
417	bool
418	rxvt_color::set (rxvt_display display, const char name)
419	{
420	#if XFT
421	return XftColorAllocName (display->display, display->visual, display->cmap,
422	name, &c);
423	#else
424	XColor xc;
425
426	if (XParseColor (display->display, display->cmap, name, &xc))
427	return set (display, xc.red, xc.green, xc.blue);
428
429	return false;
430	#endif
431	}
432
433	bool
434	rxvt_color::set (rxvt_display *display, unsigned short cr, unsigned short cg, unsigned short cb)
435	{
436	XColor xc;
437
438	xc.red = cr;
439	xc.green = cg;
440	xc.blue = cb;
441	xc.flags = DoRed \| DoGreen \| DoBlue;
442
443	if (XAllocColor (display->display, display->cmap, &xc))
444	return set (display, xc.pixel);
445
446	return false;
447	}
448
449	void
450	rxvt_color::get (rxvt_display *display, unsigned short &cr, unsigned short &cg, unsigned short &cb)
451	{
452	#if XFT
453	cr = c.color.red;
454	cg = c.color.green;
455	cb = c.color.blue;
456	#else
457	XColor c;
458
459	c.pixel = p;
460	XQueryColor (display->display, display->cmap, &c);
461
462	cr = c.red;
463	cg = c.green;
464	cb = c.blue;
465	#endif
466	}
467
468	void
469	rxvt_color::free (rxvt_display *display)
470	{
471	#if XFT
472	XftColorFree (display->display, display->visual, display->cmap, &c);
473	#else
474	XFreeColors (display->display, display->cmap, &p, 1, AllPlanes);
475	#endif
476	}
477
478	rxvt_color
479	rxvt_color::fade (rxvt_display *display, int percent)
480	{
481	percent = 100 - percent;
482
483	unsigned short cr, cg, cb;
484	rxvt_color faded;
485
486	get (display, cr, cg, cb);
487
488	faded.set (
489	display,
490	cr * percent / 100,
491	cg * percent / 100,
492	cb * percent / 100
493	);
494
495	return faded;
496	}
497
498	#define LERP(a,b,p) (a * p + b * (100 - p)) / 100
499
500	rxvt_color
501	rxvt_color::fade (rxvt_display *display, int percent, rxvt_color &fadeto)
502	{
503	percent = 100 - percent;
504
505	unsigned short cr, cg, cb;
506	unsigned short fcr, fcg, fcb;
507	rxvt_color faded;
508
509	get (display, cr, cg, cb);
510	fadeto.get(display, fcr, fcg, fcb);
511
512	faded.set (
513	display,
514	LERP (cr, fcr, percent),
515	LERP (cg, fcg, percent),
516	LERP (cb, fcb, percent)
517	);
518
519	return faded;
520	}
521