server/socket/image.C

/*
 * CrossFire, A Multiplayer game
 *
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * Copyright (C) 2001 Mark Wedel
 * Copyright (C) 1992 Frank Tore Johansen
 *
 * 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.
 *
 * The author can be reached via e-mail to <crossfire@schmorp.de>
 */

/** \file
 * Image related communication
 *
 *  \date 2003-12-02
 *
 * This file deals with the image related communication to the
 * client.  I've located all the functions in this file - this
 * localizes it more, and means that we don't need to declare
 * things like all the structures as globals.
 */

#include <global.h>
#include <sproto.h>

#include "crc.h"

#define MAX_FACE_SETS   20  /**< Maximum number of image sets the program will handle */

/** Information about one image */
typedef struct FaceInfo
{
  uint8 *data;              /**< image data */
  uint16 datalen;           /**< length of the xpm data */
  uint32 checksum;          /**< Checksum of face data */
} FaceInfo;

/** Information about one face set */
typedef struct
{
  char *prefix;         /**< */
  char *fullname;

  uint8 fallback;       /**< faceset to use when an image is not found in this faceset */
  char *size;
  char *extension;
  char *comment;

  FaceInfo *faces;      /**< images in this faceset */
} FaceSets;

static FaceSets facesets[MAX_FACE_SETS];    /**< All facesets */

/**
 * Checks specified faceset is valid
 * \param fsn faceset number
 */
int
is_valid_faceset (int fsn)
{
  if (fsn >= 0 && fsn < MAX_FACE_SETS && facesets[fsn].prefix)
    return TRUE;
  return FALSE;
}

/**
 * Frees all faceset information
 */
void
free_socket_images (void)
{
  int num, q;

  for (num = 0; num < MAX_FACE_SETS; num++)
    {
      if (facesets[num].prefix)
        {
          for (q = 0; q < nrofpixmaps; q++)
            if (facesets[num].faces[q].data)
              free (facesets[num].faces[q].data);

          free (facesets[num].prefix);
          free (facesets[num].fullname);
          free (facesets[num].size);
          free (facesets[num].extension);
          free (facesets[num].comment);
          free (facesets[num].faces);
        }
    }
}

/**
 * This returns the set we will actually use when sending
 * a face.  This is used because the image files may be sparse.
 * This function is recursive.  imageno is the face number we are
 * trying to send
 *
 * If face is not found in specified faceset, tries with 'fallback' faceset.
 *
 * \param faceset faceset to check
 * \param imageno image number
 *
 */
static int
get_face_fallback (int faceset, int imageno)
{
  /* faceset 0 is supposed to have every image, so just return.  Doing
   * so also prevents infinite loops in the case if it not having
   * the face, but in that case, we are likely to crash when we try
   * to access the data, but that is probably preferable to an infinite
   * loop.
   */
  if (faceset == 0)
    return 0;

  if (!facesets[faceset].prefix)
    {
      LOG (llevError, "get_face_fallback called with unused set (%d)?\n", faceset);
      return 0;                 /* use default set */
    }

  if (facesets[faceset].faces[imageno].data)
    return faceset;

  return get_face_fallback (facesets[faceset].fallback, imageno);
}

/**
 * Checks fallback are correctly defined.
 * This is a simple recursive function that makes sure the fallbacks
 * are all proper (eg, the fall back to defined sets, and also
 * eventually fall back to 0).  At the top level, togo is set to MAX_FACE_SETS,
 * if togo gets to zero, it means we have a loop.
 * This is only run when we first load the facesets.
 */
static void
check_faceset_fallback (int faceset, int togo)
{
  int fallback = facesets[faceset].fallback;

  /* proper case - falls back to base set */
  if (fallback == 0)
    return;

  if (!facesets[fallback].prefix)
    {
      LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback);
      abort ();
    }

  togo--;
  if (togo == 0)
    {
      LOG (llevError, "Infinite loop found in facesets. aborting.\n");
      abort ();
    }

  check_faceset_fallback (fallback, togo);
}

#define MAX_IMAGE_SIZE 10000

/**
 * Loads all the image types into memory.
 *
 *  This  way, we can easily send them to the client.  We should really do something
 * better than abort on any errors - on the other hand, these are all fatal
 * to the server (can't work around them), but the abort just seems a bit
 * messy (exit would probably be better.)
 *
 * Couple of notes:  We assume that the faces are in a continous block.
 * This works fine for now, but this could perhaps change in the future
 *
 * Function largely rewritten May 2000 to be more general purpose.
 * The server itself does not care what the image data is - to the server,
 * it is just data it needs to allocate.  As such, the code is written
 * to do such.
 */
void
read_client_images (void)
{
  char filename[400];
  char buf[HUGE_BUF];
  char *cp, *cps[7];
  FILE *infile;
  int num, len, compressed, fileno, i, badline;

  memset (facesets, 0, sizeof (facesets));
  sprintf (filename, "%s/image_info", settings.datadir);
  if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
    {
      LOG (llevError, "Unable to open %s\n", filename);
      abort ();
    }

  while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
    {
      badline = 0;

      if (buf[0] == '#')
        continue;

      if (!(cps[0] = strtok (buf, ":")))
        badline = 1;

      for (i = 1; i < 7; i++)
        if (!(cps[i] = strtok (NULL, ":")))
          badline = 1;

      if (badline)
        LOG (llevError, "Bad line in image_info file, ignoring line:\n  %s", buf);
      else
        {
          len = atoi (cps[0]);
          if (len >= MAX_FACE_SETS)
            {
              LOG (llevError, "To high a setnum in image_info file: %d > %d\n", len, MAX_FACE_SETS);
              abort ();
            }
          facesets[len].prefix = strdup (cps[1]);
          facesets[len].fullname = strdup (cps[2]);
          facesets[len].fallback = atoi (cps[3]);
          facesets[len].size = strdup (cps[4]);
          facesets[len].extension = strdup (cps[5]);
          facesets[len].comment = strdup (cps[6]);
        }
    }

  close_and_delete (infile, compressed);

  for (i = 0; i < MAX_FACE_SETS; i++)
    {
      if (facesets[i].prefix)
        check_faceset_fallback (i, MAX_FACE_SETS);
    }

  /* Loaded the faceset information - now need to load up the
   * actual faces.
   */

  for (fileno = 0; fileno < MAX_FACE_SETS; fileno++)
    {
      /* if prefix is not set, this is not used */
      if (!facesets[fileno].prefix)
        continue;

      facesets[fileno].faces = (FaceInfo *) calloc (nrofpixmaps, sizeof (FaceInfo));

      sprintf (filename, "%s/crossfire.%d", settings.datadir, fileno);
      LOG (llevDebug, "Loading image file %s\n", filename);

      if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
        {
          LOG (llevError, "Unable to open %s\n", filename);
          abort ();
        }

      while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
        {
          if (strncmp (buf, "IMAGE ", 6) != 0)
            {
              LOG (llevError, "read_client_images:Bad image line - not IMAGE, instead\n%s", buf);
              abort ();
            }

          num = atoi (buf + 6);
          if (num < 0 || num >= nrofpixmaps)
            {
              LOG (llevError, "read_client_images: Image num %d not in 0..%d\n%s", num, nrofpixmaps, buf);
              abort ();
            }

          /* Skip accross the number data */
          for (cp = buf + 6; *cp != ' '; cp++)
            ;

          len = atoi (cp);
          if (len == 0 || len > MAX_IMAGE_SIZE)
            {
              LOG (llevError, "read_client_images: length not valid: %d > %d \n%s", len, MAX_IMAGE_SIZE, buf);
              abort ();
            }

          /* We don't actualy care about the name of the image that
           * is embedded in the image file, so just ignore it.
           */
          facesets[fileno].faces[num].datalen = len;
          facesets[fileno].faces[num].data = (uint8 *) malloc (len);
          if ((i = fread (facesets[fileno].faces[num].data, len, 1, infile)) != 1)
            {
              LOG (llevError, "read_client_images: Did not read desired amount of data, wanted %d, got %d\n%s", len, i, buf);
              abort ();
            }

          crc32 chksum;

          for (i = 0; i < len; i++)
            chksum (facesets[fileno].faces[num].data[i]);

          facesets[fileno].faces[num].checksum = chksum;
        }

      close_and_delete (infile, compressed);
    }                           /* For fileno < MAX_FACE_SETS */
}

/**
 * Client tells us what type of faces it wants.  Also sets
 * the caching attribute.
 *
 */
void
SetFaceMode (char *buf, int len, client *ns)
{
  int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE);

  if (mode == CF_FACE_NONE)
    ns->facecache = 1;
  else if (mode != CF_FACE_PNG)
    ns->send_packet_printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode.  Will use Png");

  if (mask)
    ns->facecache = 1;
}

/**
 * Client has requested pixmap that it somehow missed getting.
 * This will be called often if the client is
 * caching images.
 */
void
SendFaceCmd (char *buf, int len, client *ns)
{
  uint16 facenum = atoi (buf);

  if (facenum != 0)
    esrv_send_face (ns, facenum, 1);
}

/**
 * Sends a face to a client if they are in pixmap mode
 * nothing gets sent in bitmap mode. 
 * If nocache is true (nonzero), ignore the cache setting from the client -
 * this is needed for the askface, in which we really do want to send the
 * face (and askface is the only place that should be setting it).  Otherwise,
 * we look at the facecache, and if set, send the image name.
 */
void
esrv_send_face (client *ns, short face_num, int nocache)
{
  char fallback;

  if (face_num <= 0 || face_num >= nrofpixmaps)
    {
      LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num);
      return;
    }

  packet sl;
  fallback = get_face_fallback (ns->faceset, face_num);

  if (facesets[fallback].faces[face_num].data == NULL)
    {
      LOG (llevError, "esrv_send_face: faces[%d].data == NULL\n", face_num);
      return;
    }

  if (ns->facecache && !nocache)
    {
      sl << (ns->image2 ? "face2 " : "face1 ")
         << uint16 (face_num);

      if (ns->image2)
        sl << uint8 (fallback);

      sl << uint32 (facesets[fallback].faces[face_num].checksum)
         << new_faces[face_num].name;

      ns->send_packet (sl);
    }
  else
    {
      sl << (ns->image2 ? "image2 " : "image ")
         << uint32 (face_num);

      if (ns->image2)
        sl << uint8 (fallback);

      sl << uint32 (facesets[fallback].faces[face_num].datalen)
         << data (facesets[fallback].faces[face_num].data, facesets[fallback].faces[face_num].datalen);

      ns->send_packet (sl);
    }

  ns->faces_sent[face_num] |= NS_FACESENT_FACE;
}

/**
 * Sends the number of images, checksum of the face file,
 * and the image_info file information.  See the doc/Developers/protocol
 * if you want further detail.
 */

void
send_image_info (client *ns, char *params)
{
  packet sl;

  sl.printf ("replyinfo image_info\n%d\n%u\n", nrofpixmaps - 1, (unsigned int)bmaps_checksum);

  for (int i = 0; i < MAX_FACE_SETS; i++)
    if (facesets[i].prefix)
      sl.printf ("%d:%s:%s:%d:%s:%s:%s", i,
                 facesets[i].prefix, facesets[i].fullname , facesets[i].fallback,
                 facesets[i].size  , facesets[i].extension, facesets[i].comment);

  ns->send_packet (sl);
}

/**
 * Sends requested face information.
 * \param ns socket to send to
 * \param params contains first and last index of face
 *
 * For each image in [start..stop] sends
 *  - checksum
 *  - name
 */
void
send_image_sums (client *ns, char *params)
{
  int start, stop;
  char *cp;

  packet sl;

  start = atoi (params);
  for (cp = params; *cp != '\0'; cp++)
    if (*cp == ' ')
      break;

  stop = atoi (cp);
  if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= nrofpixmaps)
    {
      sl.printf ("replyinfo image_sums %d %d", start, stop);
      ns->send_packet (sl);
      sl.reset ();
      return;
    }

  sl.printf ("replyinfo image_sums %d %d ", start, stop);

  for (int i = start; i <= stop; i++)
    {
      ns->faces_sent[i] |= NS_FACESENT_FACE;

      int qq = get_face_fallback (ns->faceset, i);

      sl << uint16 (i)
         << uint32 (facesets[qq].faces[i].checksum)
         << uint8  (qq)
         << data8  (&new_faces[i].name, new_faces[i].name.length () + 1);
    }

  /* It would make more sense to catch this pre-emptively in the code above.
   * however, if this really happens, we probably just want to cut down the
   * size to less than 1000, since that is what we claim the protocol would
   * support.
   */
  if (sl.length () >= MAXSOCKBUF)
    {
      LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF);
      abort ();
    }

  ns->send_packet (sl);
}

Revision:	1.22
Committed:	Thu Mar 1 12:28:17 2007 UTC (17 years, 3 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_0
Changes since 1.21:	+1 -1 lines
Log Message:	nano-cleanups
#	Content
1	/*
2	* CrossFire, A Multiplayer game
3	*
4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	* Copyright (C) 2001 Mark Wedel
6	* Copyright (C) 1992 Frank Tore Johansen
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	* The author can be reached via e-mail to <crossfire@schmorp.de>
23	*/
24
25	/** \file
26	* Image related communication
27	*
28	* \date 2003-12-02
29	*
30	* This file deals with the image related communication to the
31	* client. I've located all the functions in this file - this
32	* localizes it more, and means that we don't need to declare
33	* things like all the structures as globals.
34	*/
35
36	#include <global.h>
37	#include <sproto.h>
38
39	#include "crc.h"
40
41	#define MAX_FACE_SETS 20 /*< Maximum number of image sets the program will handle /
42
43	/** Information about one image */
44	typedef struct FaceInfo
45	{
46	uint8 data; /< image data /
47	uint16 datalen; /*< length of the xpm data /
48	uint32 checksum; /*< Checksum of face data /
49	} FaceInfo;
50
51	/** Information about one face set */
52	typedef struct
53	{
54	char prefix; /< /
55	char *fullname;
56
57	uint8 fallback; /*< faceset to use when an image is not found in this faceset /
58	char *size;
59	char *extension;
60	char *comment;
61
62	FaceInfo faces; /< images in this faceset /
63	} FaceSets;
64
65	static FaceSets facesets[MAX_FACE_SETS]; /*< All facesets /
66
67	/**
68	* Checks specified faceset is valid
69	* \param fsn faceset number
70	*/
71	int
72	is_valid_faceset (int fsn)
73	{
74	if (fsn >= 0 && fsn < MAX_FACE_SETS && facesets[fsn].prefix)
75	return TRUE;
76	return FALSE;
77	}
78
79	/**
80	* Frees all faceset information
81	*/
82	void
83	free_socket_images (void)
84	{
85	int num, q;
86
87	for (num = 0; num < MAX_FACE_SETS; num++)
88	{
89	if (facesets[num].prefix)
90	{
91	for (q = 0; q < nrofpixmaps; q++)
92	if (facesets[num].faces[q].data)
93	free (facesets[num].faces[q].data);
94
95	free (facesets[num].prefix);
96	free (facesets[num].fullname);
97	free (facesets[num].size);
98	free (facesets[num].extension);
99	free (facesets[num].comment);
100	free (facesets[num].faces);
101	}
102	}
103	}
104
105	/**
106	* This returns the set we will actually use when sending
107	* a face. This is used because the image files may be sparse.
108	* This function is recursive. imageno is the face number we are
109	* trying to send
110	*
111	* If face is not found in specified faceset, tries with 'fallback' faceset.
112	*
113	* \param faceset faceset to check
114	* \param imageno image number
115	*
116	*/
117	static int
118	get_face_fallback (int faceset, int imageno)
119	{
120	/* faceset 0 is supposed to have every image, so just return. Doing
121	* so also prevents infinite loops in the case if it not having
122	* the face, but in that case, we are likely to crash when we try
123	* to access the data, but that is probably preferable to an infinite
124	* loop.
125	*/
126	if (faceset == 0)
127	return 0;
128
129	if (!facesets[faceset].prefix)
130	{
131	LOG (llevError, "get_face_fallback called with unused set (%d)?\n", faceset);
132	return 0; /* use default set */
133	}
134
135	if (facesets[faceset].faces[imageno].data)
136	return faceset;
137
138	return get_face_fallback (facesets[faceset].fallback, imageno);
139	}
140
141	/**
142	* Checks fallback are correctly defined.
143	* This is a simple recursive function that makes sure the fallbacks
144	* are all proper (eg, the fall back to defined sets, and also
145	* eventually fall back to 0). At the top level, togo is set to MAX_FACE_SETS,
146	* if togo gets to zero, it means we have a loop.
147	* This is only run when we first load the facesets.
148	*/
149	static void
150	check_faceset_fallback (int faceset, int togo)
151	{
152	int fallback = facesets[faceset].fallback;
153
154	/* proper case - falls back to base set */
155	if (fallback == 0)
156	return;
157
158	if (!facesets[fallback].prefix)
159	{
160	LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback);
161	abort ();
162	}
163
164	togo--;
165	if (togo == 0)
166	{
167	LOG (llevError, "Infinite loop found in facesets. aborting.\n");
168	abort ();
169	}
170
171	check_faceset_fallback (fallback, togo);
172	}
173
174	#define MAX_IMAGE_SIZE 10000
175
176	/**
177	* Loads all the image types into memory.
178	*
179	* This way, we can easily send them to the client. We should really do something
180	* better than abort on any errors - on the other hand, these are all fatal
181	* to the server (can't work around them), but the abort just seems a bit
182	* messy (exit would probably be better.)
183	*
184	* Couple of notes: We assume that the faces are in a continous block.
185	* This works fine for now, but this could perhaps change in the future
186	*
187	* Function largely rewritten May 2000 to be more general purpose.
188	* The server itself does not care what the image data is - to the server,
189	* it is just data it needs to allocate. As such, the code is written
190	* to do such.
191	*/
192	void
193	read_client_images (void)
194	{
195	char filename[400];
196	char buf[HUGE_BUF];
197	char cp, cps[7];
198	FILE *infile;
199	int num, len, compressed, fileno, i, badline;
200
201	memset (facesets, 0, sizeof (facesets));
202	sprintf (filename, "%s/image_info", settings.datadir);
203	if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
204	{
205	LOG (llevError, "Unable to open %s\n", filename);
206	abort ();
207	}
208
209	while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
210	{
211	badline = 0;
212
213	if (buf[0] == '#')
214	continue;
215
216	if (!(cps[0] = strtok (buf, ":")))
217	badline = 1;
218
219	for (i = 1; i < 7; i++)
220	if (!(cps[i] = strtok (NULL, ":")))
221	badline = 1;
222
223	if (badline)
224	LOG (llevError, "Bad line in image_info file, ignoring line:\n %s", buf);
225	else
226	{
227	len = atoi (cps[0]);
228	if (len >= MAX_FACE_SETS)
229	{
230	LOG (llevError, "To high a setnum in image_info file: %d > %d\n", len, MAX_FACE_SETS);
231	abort ();
232	}
233	facesets[len].prefix = strdup (cps[1]);
234	facesets[len].fullname = strdup (cps[2]);
235	facesets[len].fallback = atoi (cps[3]);
236	facesets[len].size = strdup (cps[4]);
237	facesets[len].extension = strdup (cps[5]);
238	facesets[len].comment = strdup (cps[6]);
239	}
240	}
241
242	close_and_delete (infile, compressed);
243
244	for (i = 0; i < MAX_FACE_SETS; i++)
245	{
246	if (facesets[i].prefix)
247	check_faceset_fallback (i, MAX_FACE_SETS);
248	}
249
250	/* Loaded the faceset information - now need to load up the
251	* actual faces.
252	*/
253
254	for (fileno = 0; fileno < MAX_FACE_SETS; fileno++)
255	{
256	/* if prefix is not set, this is not used */
257	if (!facesets[fileno].prefix)
258	continue;
259
260	facesets[fileno].faces = (FaceInfo *) calloc (nrofpixmaps, sizeof (FaceInfo));
261
262	sprintf (filename, "%s/crossfire.%d", settings.datadir, fileno);
263	LOG (llevDebug, "Loading image file %s\n", filename);
264
265	if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL)
266	{
267	LOG (llevError, "Unable to open %s\n", filename);
268	abort ();
269	}
270
271	while (fgets (buf, HUGE_BUF - 1, infile) != NULL)
272	{
273	if (strncmp (buf, "IMAGE ", 6) != 0)
274	{
275	LOG (llevError, "read_client_images:Bad image line - not IMAGE, instead\n%s", buf);
276	abort ();
277	}
278
279	num = atoi (buf + 6);
280	if (num < 0 \|\| num >= nrofpixmaps)
281	{
282	LOG (llevError, "read_client_images: Image num %d not in 0..%d\n%s", num, nrofpixmaps, buf);
283	abort ();
284	}
285
286	/* Skip accross the number data */
287	for (cp = buf + 6; *cp != ' '; cp++)
288	;
289
290	len = atoi (cp);
291	if (len == 0 \|\| len > MAX_IMAGE_SIZE)
292	{
293	LOG (llevError, "read_client_images: length not valid: %d > %d \n%s", len, MAX_IMAGE_SIZE, buf);
294	abort ();
295	}
296
297	/* We don't actualy care about the name of the image that
298	* is embedded in the image file, so just ignore it.
299	*/
300	facesets[fileno].faces[num].datalen = len;
301	facesets[fileno].faces[num].data = (uint8 *) malloc (len);
302	if ((i = fread (facesets[fileno].faces[num].data, len, 1, infile)) != 1)
303	{
304	LOG (llevError, "read_client_images: Did not read desired amount of data, wanted %d, got %d\n%s", len, i, buf);
305	abort ();
306	}
307
308	crc32 chksum;
309
310	for (i = 0; i < len; i++)
311	chksum (facesets[fileno].faces[num].data[i]);
312
313	facesets[fileno].faces[num].checksum = chksum;
314	}
315
316	close_and_delete (infile, compressed);
317	} /* For fileno < MAX_FACE_SETS */
318	}
319
320	/**
321	* Client tells us what type of faces it wants. Also sets
322	* the caching attribute.
323	*
324	*/
325	void
326	SetFaceMode (char buf, int len, client ns)
327	{
328	int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE);
329
330	if (mode == CF_FACE_NONE)
331	ns->facecache = 1;
332	else if (mode != CF_FACE_PNG)
333	ns->send_packet_printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode. Will use Png");
334
335	if (mask)
336	ns->facecache = 1;
337	}
338
339	/**
340	* Client has requested pixmap that it somehow missed getting.
341	* This will be called often if the client is
342	* caching images.
343	*/
344	void
345	SendFaceCmd (char buf, int len, client ns)
346	{
347	uint16 facenum = atoi (buf);
348
349	if (facenum != 0)
350	esrv_send_face (ns, facenum, 1);
351	}
352
353	/**
354	* Sends a face to a client if they are in pixmap mode
355	* nothing gets sent in bitmap mode.
356	* If nocache is true (nonzero), ignore the cache setting from the client -
357	* this is needed for the askface, in which we really do want to send the
358	* face (and askface is the only place that should be setting it). Otherwise,
359	* we look at the facecache, and if set, send the image name.
360	*/
361	void
362	esrv_send_face (client *ns, short face_num, int nocache)
363	{
364	char fallback;
365
366	if (face_num <= 0 \|\| face_num >= nrofpixmaps)
367	{
368	LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num);
369	return;
370	}
371
372	packet sl;
373	fallback = get_face_fallback (ns->faceset, face_num);
374
375	if (facesets[fallback].faces[face_num].data == NULL)
376	{
377	LOG (llevError, "esrv_send_face: faces[%d].data == NULL\n", face_num);
378	return;
379	}
380
381	if (ns->facecache && !nocache)
382	{
383	sl << (ns->image2 ? "face2 " : "face1 ")
384	<< uint16 (face_num);
385
386	if (ns->image2)
387	sl << uint8 (fallback);
388
389	sl << uint32 (facesets[fallback].faces[face_num].checksum)
390	<< new_faces[face_num].name;
391
392	ns->send_packet (sl);
393	}
394	else
395	{
396	sl << (ns->image2 ? "image2 " : "image ")
397	<< uint32 (face_num);
398
399	if (ns->image2)
400	sl << uint8 (fallback);
401
402	sl << uint32 (facesets[fallback].faces[face_num].datalen)
403	<< data (facesets[fallback].faces[face_num].data, facesets[fallback].faces[face_num].datalen);
404
405	ns->send_packet (sl);
406	}
407
408	ns->faces_sent[face_num] \|= NS_FACESENT_FACE;
409	}
410
411	/**
412	* Sends the number of images, checksum of the face file,
413	* and the image_info file information. See the doc/Developers/protocol
414	* if you want further detail.
415	*/
416
417	void
418	send_image_info (client ns, char params)
419	{
420	packet sl;
421
422	sl.printf ("replyinfo image_info\n%d\n%u\n", nrofpixmaps - 1, (unsigned int)bmaps_checksum);
423
424	for (int i = 0; i < MAX_FACE_SETS; i++)
425	if (facesets[i].prefix)
426	sl.printf ("%d:%s:%s:%d:%s:%s:%s", i,
427	facesets[i].prefix, facesets[i].fullname , facesets[i].fallback,
428	facesets[i].size , facesets[i].extension, facesets[i].comment);
429
430	ns->send_packet (sl);
431	}
432
433	/**
434	* Sends requested face information.
435	* \param ns socket to send to
436	* \param params contains first and last index of face
437	*
438	* For each image in [start..stop] sends
439	* - checksum
440	* - name
441	*/
442	void
443	send_image_sums (client ns, char params)
444	{
445	int start, stop;
446	char *cp;
447
448	packet sl;
449
450	start = atoi (params);
451	for (cp = params; *cp != '\0'; cp++)
452	if (*cp == ' ')
453	break;
454
455	stop = atoi (cp);
456	if (stop < start \|\| *cp == '\0' \|\| (stop - start) > 1000 \|\| stop >= nrofpixmaps)
457	{
458	sl.printf ("replyinfo image_sums %d %d", start, stop);
459	ns->send_packet (sl);
460	sl.reset ();
461	return;
462	}
463
464	sl.printf ("replyinfo image_sums %d %d ", start, stop);
465
466	for (int i = start; i <= stop; i++)
467	{
468	ns->faces_sent[i] \|= NS_FACESENT_FACE;
469
470	int qq = get_face_fallback (ns->faceset, i);
471
472	sl << uint16 (i)
473	<< uint32 (facesets[qq].faces[i].checksum)
474	<< uint8 (qq)
475	<< data8 (&new_faces[i].name, new_faces[i].name.length () + 1);
476	}
477
478	/* It would make more sense to catch this pre-emptively in the code above.
479	* however, if this really happens, we probably just want to cut down the
480	* size to less than 1000, since that is what we claim the protocol would
481	* support.
482	*/
483	if (sl.length () >= MAXSOCKBUF)
484	{
485	LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF);
486	abort ();
487	}
488
489	ns->send_packet (sl);
490	}
491