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elmex |
1.1 |
/* |
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CrossFire, A Multiplayer game for X-windows |
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Copyright (C) 2001 Mark Wedel |
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Copyright (C) 1992 Frank Tore Johansen |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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root |
1.4 |
The author can be reached via e-mail to <crossfire@schmorp.de> |
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elmex |
1.1 |
*/ |
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/** \file |
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* Image related communication |
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* |
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* \date 2003-12-02 |
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* |
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* This file deals with the image related communication to the |
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* client. I've located all the functions in this file - this |
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* localizes it more, and means that we don't need to declare |
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* things like all the structures as globals. |
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*/ |
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#include <global.h> |
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#include <sproto.h> |
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#define MAX_FACE_SETS 20 /**< Maximum number of image sets the program will handle */ |
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40 |
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/** Information about one image */ |
41 |
root |
1.3 |
typedef struct FaceInfo |
42 |
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{ |
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uint8 *data; /**< image data */ |
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uint16 datalen; /**< length of the xpm data */ |
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uint32 checksum; /**< Checksum of face data */ |
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elmex |
1.1 |
} FaceInfo; |
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/** Information about one face set */ |
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root |
1.3 |
typedef struct |
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{ |
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char *prefix; /**< */ |
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char *fullname; |
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uint8 fallback; /**< faceset to use when an image is not found in this faceset */ |
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char *size; |
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char *extension; |
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char *comment; |
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FaceInfo *faces; /**< images in this faceset */ |
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elmex |
1.1 |
} FaceSets; |
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static FaceSets facesets[MAX_FACE_SETS]; /**< All facesets */ |
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/** |
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* Checks specified faceset is valid |
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* \param fsn faceset number |
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*/ |
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root |
1.3 |
int |
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is_valid_faceset (int fsn) |
70 |
elmex |
1.1 |
{ |
71 |
root |
1.3 |
if (fsn >= 0 && fsn < MAX_FACE_SETS && facesets[fsn].prefix) |
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return TRUE; |
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return FALSE; |
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elmex |
1.1 |
} |
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/** |
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* Frees all faceset information |
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*/ |
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root |
1.3 |
void |
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free_socket_images (void) |
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elmex |
1.1 |
{ |
82 |
root |
1.3 |
int num, q; |
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elmex |
1.1 |
|
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root |
1.3 |
for (num = 0; num < MAX_FACE_SETS; num++) |
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{ |
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if (facesets[num].prefix) |
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{ |
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for (q = 0; q < nrofpixmaps; q++) |
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if (facesets[num].faces[q].data) |
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free (facesets[num].faces[q].data); |
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root |
1.15 |
|
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root |
1.3 |
free (facesets[num].prefix); |
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free (facesets[num].fullname); |
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free (facesets[num].size); |
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free (facesets[num].extension); |
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free (facesets[num].comment); |
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free (facesets[num].faces); |
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root |
1.2 |
} |
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elmex |
1.1 |
} |
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} |
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/** |
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* This returns the set we will actually use when sending |
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* a face. This is used because the image files may be sparse. |
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* This function is recursive. imageno is the face number we are |
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* trying to send |
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* |
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* If face is not found in specified faceset, tries with 'fallback' faceset. |
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* |
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* \param faceset faceset to check |
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* \param imageno image number |
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* |
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*/ |
114 |
root |
1.3 |
static int |
115 |
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get_face_fallback (int faceset, int imageno) |
116 |
elmex |
1.1 |
{ |
117 |
root |
1.3 |
/* faceset 0 is supposed to have every image, so just return. Doing |
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* so also prevents infinite loops in the case if it not having |
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* the face, but in that case, we are likely to crash when we try |
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* to access the data, but that is probably preferable to an infinite |
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* loop. |
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*/ |
123 |
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if (faceset == 0) |
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return 0; |
125 |
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126 |
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if (!facesets[faceset].prefix) |
127 |
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{ |
128 |
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LOG (llevError, "get_face_fallback called with unused set (%d)?\n", faceset); |
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return 0; /* use default set */ |
130 |
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} |
131 |
root |
1.15 |
|
132 |
root |
1.3 |
if (facesets[faceset].faces[imageno].data) |
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return faceset; |
134 |
root |
1.15 |
|
135 |
root |
1.3 |
return get_face_fallback (facesets[faceset].fallback, imageno); |
136 |
elmex |
1.1 |
} |
137 |
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/** |
139 |
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* Checks fallback are correctly defined. |
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* This is a simple recursive function that makes sure the fallbacks |
141 |
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* are all proper (eg, the fall back to defined sets, and also |
142 |
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* eventually fall back to 0). At the top level, togo is set to MAX_FACE_SETS, |
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* if togo gets to zero, it means we have a loop. |
144 |
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* This is only run when we first load the facesets. |
145 |
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*/ |
146 |
root |
1.3 |
static void |
147 |
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check_faceset_fallback (int faceset, int togo) |
148 |
elmex |
1.1 |
{ |
149 |
root |
1.3 |
int fallback = facesets[faceset].fallback; |
150 |
elmex |
1.1 |
|
151 |
root |
1.3 |
/* proper case - falls back to base set */ |
152 |
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if (fallback == 0) |
153 |
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return; |
154 |
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155 |
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if (!facesets[fallback].prefix) |
156 |
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{ |
157 |
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LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback); |
158 |
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abort (); |
159 |
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} |
160 |
root |
1.15 |
|
161 |
root |
1.3 |
togo--; |
162 |
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if (togo == 0) |
163 |
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{ |
164 |
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LOG (llevError, "Infinite loop found in facesets. aborting.\n"); |
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abort (); |
166 |
elmex |
1.1 |
} |
167 |
root |
1.15 |
|
168 |
root |
1.3 |
check_faceset_fallback (fallback, togo); |
169 |
elmex |
1.1 |
} |
170 |
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171 |
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#define MAX_IMAGE_SIZE 10000 |
172 |
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173 |
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/** |
174 |
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* Loads all the image types into memory. |
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* |
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* This way, we can easily send them to the client. We should really do something |
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* better than abort on any errors - on the other hand, these are all fatal |
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* to the server (can't work around them), but the abort just seems a bit |
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* messy (exit would probably be better.) |
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* |
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* Couple of notes: We assume that the faces are in a continous block. |
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* This works fine for now, but this could perhaps change in the future |
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* |
184 |
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* Function largely rewritten May 2000 to be more general purpose. |
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* The server itself does not care what the image data is - to the server, |
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* it is just data it needs to allocate. As such, the code is written |
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* to do such. |
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*/ |
189 |
root |
1.3 |
void |
190 |
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read_client_images (void) |
191 |
elmex |
1.1 |
{ |
192 |
root |
1.3 |
char filename[400]; |
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char buf[HUGE_BUF]; |
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char *cp, *cps[7]; |
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FILE *infile; |
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int num, len, compressed, fileno, i, badline; |
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198 |
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memset (facesets, 0, sizeof (facesets)); |
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sprintf (filename, "%s/image_info", settings.datadir); |
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if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL) |
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{ |
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LOG (llevError, "Unable to open %s\n", filename); |
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abort (); |
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} |
205 |
root |
1.15 |
|
206 |
root |
1.3 |
while (fgets (buf, HUGE_BUF - 1, infile) != NULL) |
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{ |
208 |
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badline = 0; |
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210 |
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if (buf[0] == '#') |
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continue; |
212 |
root |
1.15 |
|
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root |
1.3 |
if (!(cps[0] = strtok (buf, ":"))) |
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badline = 1; |
215 |
root |
1.15 |
|
216 |
root |
1.3 |
for (i = 1; i < 7; i++) |
217 |
root |
1.15 |
if (!(cps[i] = strtok (NULL, ":"))) |
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badline = 1; |
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220 |
root |
1.3 |
if (badline) |
221 |
root |
1.15 |
LOG (llevError, "Bad line in image_info file, ignoring line:\n %s", buf); |
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root |
1.3 |
else |
223 |
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{ |
224 |
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len = atoi (cps[0]); |
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if (len >= MAX_FACE_SETS) |
226 |
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{ |
227 |
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LOG (llevError, "To high a setnum in image_info file: %d > %d\n", len, MAX_FACE_SETS); |
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abort (); |
229 |
root |
1.2 |
} |
230 |
root |
1.12 |
facesets[len].prefix = strdup (cps[1]); |
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facesets[len].fullname = strdup (cps[2]); |
232 |
root |
1.3 |
facesets[len].fallback = atoi (cps[3]); |
233 |
root |
1.12 |
facesets[len].size = strdup (cps[4]); |
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facesets[len].extension = strdup (cps[5]); |
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facesets[len].comment = strdup (cps[6]); |
236 |
root |
1.2 |
} |
237 |
elmex |
1.1 |
} |
238 |
root |
1.15 |
|
239 |
root |
1.3 |
close_and_delete (infile, compressed); |
240 |
root |
1.15 |
|
241 |
root |
1.3 |
for (i = 0; i < MAX_FACE_SETS; i++) |
242 |
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{ |
243 |
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if (facesets[i].prefix) |
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check_faceset_fallback (i, MAX_FACE_SETS); |
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} |
246 |
root |
1.15 |
|
247 |
root |
1.3 |
/* Loaded the faceset information - now need to load up the |
248 |
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* actual faces. |
249 |
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*/ |
250 |
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251 |
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for (fileno = 0; fileno < MAX_FACE_SETS; fileno++) |
252 |
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{ |
253 |
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/* if prefix is not set, this is not used */ |
254 |
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if (!facesets[fileno].prefix) |
255 |
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continue; |
256 |
root |
1.15 |
|
257 |
root |
1.3 |
facesets[fileno].faces = (FaceInfo *) calloc (nrofpixmaps, sizeof (FaceInfo)); |
258 |
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259 |
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sprintf (filename, "%s/crossfire.%d", settings.datadir, fileno); |
260 |
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LOG (llevDebug, "Loading image file %s\n", filename); |
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262 |
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if ((infile = open_and_uncompress (filename, 0, &compressed)) == NULL) |
263 |
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{ |
264 |
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LOG (llevError, "Unable to open %s\n", filename); |
265 |
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abort (); |
266 |
root |
1.2 |
} |
267 |
root |
1.15 |
|
268 |
root |
1.3 |
while (fgets (buf, HUGE_BUF - 1, infile) != NULL) |
269 |
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{ |
270 |
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if (strncmp (buf, "IMAGE ", 6) != 0) |
271 |
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{ |
272 |
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LOG (llevError, "read_client_images:Bad image line - not IMAGE, instead\n%s", buf); |
273 |
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abort (); |
274 |
root |
1.2 |
} |
275 |
root |
1.15 |
|
276 |
root |
1.3 |
num = atoi (buf + 6); |
277 |
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if (num < 0 || num >= nrofpixmaps) |
278 |
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{ |
279 |
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LOG (llevError, "read_client_images: Image num %d not in 0..%d\n%s", num, nrofpixmaps, buf); |
280 |
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abort (); |
281 |
root |
1.2 |
} |
282 |
root |
1.15 |
|
283 |
root |
1.3 |
/* Skip accross the number data */ |
284 |
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for (cp = buf + 6; *cp != ' '; cp++); |
285 |
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len = atoi (cp); |
286 |
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if (len == 0 || len > MAX_IMAGE_SIZE) |
287 |
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{ |
288 |
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LOG (llevError, "read_client_images: length not valid: %d > %d \n%s", len, MAX_IMAGE_SIZE, buf); |
289 |
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abort (); |
290 |
root |
1.2 |
} |
291 |
root |
1.15 |
|
292 |
root |
1.5 |
/* We don't actualy care about the name of the image that |
293 |
root |
1.3 |
* is embedded in the image file, so just ignore it. |
294 |
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*/ |
295 |
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facesets[fileno].faces[num].datalen = len; |
296 |
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facesets[fileno].faces[num].data = (uint8 *) malloc (len); |
297 |
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if ((i = fread (facesets[fileno].faces[num].data, len, 1, infile)) != 1) |
298 |
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{ |
299 |
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LOG (llevError, "read_client_images: Did not read desired amount of data, wanted %d, got %d\n%s", len, i, buf); |
300 |
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abort (); |
301 |
root |
1.2 |
} |
302 |
root |
1.15 |
|
303 |
root |
1.3 |
facesets[fileno].faces[num].checksum = 0; |
304 |
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for (i = 0; i < len; i++) |
305 |
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{ |
306 |
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ROTATE_RIGHT (facesets[fileno].faces[num].checksum); |
307 |
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facesets[fileno].faces[num].checksum += facesets[fileno].faces[num].data[i]; |
308 |
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facesets[fileno].faces[num].checksum &= 0xffffffff; |
309 |
root |
1.2 |
} |
310 |
|
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} |
311 |
root |
1.15 |
|
312 |
root |
1.3 |
close_and_delete (infile, compressed); |
313 |
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} /* For fileno < MAX_FACE_SETS */ |
314 |
elmex |
1.1 |
} |
315 |
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|
316 |
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/** |
317 |
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* Client tells us what type of faces it wants. Also sets |
318 |
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* the caching attribute. |
319 |
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* |
320 |
|
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*/ |
321 |
root |
1.3 |
void |
322 |
root |
1.13 |
SetFaceMode (char *buf, int len, client *ns) |
323 |
elmex |
1.1 |
{ |
324 |
root |
1.3 |
int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE); |
325 |
elmex |
1.1 |
|
326 |
root |
1.3 |
if (mode == CF_FACE_NONE) |
327 |
root |
1.7 |
ns->facecache = 1; |
328 |
root |
1.3 |
else if (mode != CF_FACE_PNG) |
329 |
root |
1.14 |
ns->send_packet_printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode. Will use Png"); |
330 |
root |
1.7 |
|
331 |
root |
1.3 |
if (mask) |
332 |
root |
1.7 |
ns->facecache = 1; |
333 |
elmex |
1.1 |
} |
334 |
|
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|
335 |
|
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/** |
336 |
|
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* Client has requested pixmap that it somehow missed getting. |
337 |
|
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* This will be called often if the client is |
338 |
|
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* caching images. |
339 |
|
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*/ |
340 |
root |
1.3 |
void |
341 |
root |
1.15 |
SendFaceCmd (char *buf, int len, client *ns) |
342 |
elmex |
1.1 |
{ |
343 |
root |
1.15 |
uint16 facenum = atoi (buf); |
344 |
elmex |
1.1 |
|
345 |
root |
1.3 |
if (facenum != 0) |
346 |
|
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esrv_send_face (ns, facenum, 1); |
347 |
elmex |
1.1 |
} |
348 |
|
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|
349 |
|
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/** |
350 |
|
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* Sends a face to a client if they are in pixmap mode |
351 |
|
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* nothing gets sent in bitmap mode. |
352 |
|
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* If nocache is true (nonzero), ignore the cache setting from the client - |
353 |
|
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* this is needed for the askface, in which we really do want to send the |
354 |
|
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* face (and askface is the only place that should be setting it). Otherwise, |
355 |
|
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* we look at the facecache, and if set, send the image name. |
356 |
|
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*/ |
357 |
root |
1.3 |
void |
358 |
root |
1.13 |
esrv_send_face (client *ns, short face_num, int nocache) |
359 |
elmex |
1.1 |
{ |
360 |
root |
1.3 |
char fallback; |
361 |
elmex |
1.1 |
|
362 |
root |
1.3 |
if (face_num <= 0 || face_num >= nrofpixmaps) |
363 |
|
|
{ |
364 |
|
|
LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num); |
365 |
|
|
return; |
366 |
|
|
} |
367 |
|
|
|
368 |
root |
1.8 |
packet sl; |
369 |
root |
1.3 |
fallback = get_face_fallback (ns->faceset, face_num); |
370 |
|
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|
371 |
|
|
if (facesets[fallback].faces[face_num].data == NULL) |
372 |
|
|
{ |
373 |
|
|
LOG (llevError, "esrv_send_face: faces[%d].data == NULL\n", face_num); |
374 |
|
|
return; |
375 |
|
|
} |
376 |
|
|
|
377 |
|
|
if (ns->facecache && !nocache) |
378 |
|
|
{ |
379 |
root |
1.6 |
sl << (ns->image2 ? "face2 " : "face1 ") |
380 |
|
|
<< uint16 (face_num); |
381 |
|
|
|
382 |
root |
1.3 |
if (ns->image2) |
383 |
root |
1.6 |
sl << uint8 (fallback); |
384 |
|
|
|
385 |
|
|
sl << uint32 (facesets[fallback].faces[face_num].checksum) |
386 |
|
|
<< new_faces[face_num].name; |
387 |
root |
1.3 |
|
388 |
root |
1.11 |
ns->send_packet (sl); |
389 |
root |
1.3 |
} |
390 |
|
|
else |
391 |
|
|
{ |
392 |
root |
1.6 |
sl << (ns->image2 ? "image2 " : "image ") |
393 |
|
|
<< uint32 (face_num); |
394 |
|
|
|
395 |
root |
1.3 |
if (ns->image2) |
396 |
root |
1.6 |
sl << uint8 (fallback); |
397 |
|
|
|
398 |
|
|
sl << uint32 (facesets[fallback].faces[face_num].datalen) |
399 |
|
|
<< data (facesets[fallback].faces[face_num].data, facesets[fallback].faces[face_num].datalen); |
400 |
|
|
|
401 |
root |
1.11 |
ns->send_packet (sl); |
402 |
elmex |
1.1 |
} |
403 |
root |
1.6 |
|
404 |
root |
1.3 |
ns->faces_sent[face_num] |= NS_FACESENT_FACE; |
405 |
elmex |
1.1 |
} |
406 |
|
|
|
407 |
|
|
/** |
408 |
|
|
* Sends the number of images, checksum of the face file, |
409 |
|
|
* and the image_info file information. See the doc/Developers/protocol |
410 |
|
|
* if you want further detail. |
411 |
|
|
*/ |
412 |
|
|
|
413 |
root |
1.3 |
void |
414 |
root |
1.15 |
send_image_info (client *ns, char *params) |
415 |
elmex |
1.1 |
{ |
416 |
root |
1.8 |
packet sl; |
417 |
elmex |
1.1 |
|
418 |
root |
1.6 |
sl.printf ("replyinfo image_info\n%d\n%d\n", nrofpixmaps - 1, bmaps_checksum); |
419 |
|
|
|
420 |
|
|
for (int i = 0; i < MAX_FACE_SETS; i++) |
421 |
|
|
if (facesets[i].prefix) |
422 |
root |
1.15 |
sl.printf ("%d:%s:%s:%d:%s:%s:%s", i, |
423 |
|
|
facesets[i].prefix, facesets[i].fullname , facesets[i].fallback, |
424 |
|
|
facesets[i].size , facesets[i].extension, facesets[i].comment); |
425 |
elmex |
1.1 |
|
426 |
root |
1.11 |
ns->send_packet (sl); |
427 |
elmex |
1.1 |
} |
428 |
|
|
|
429 |
|
|
/** |
430 |
|
|
* Sends requested face information. |
431 |
|
|
* \param ns socket to send to |
432 |
|
|
* \param params contains first and last index of face |
433 |
|
|
* |
434 |
|
|
* For each image in [start..stop] sends |
435 |
|
|
* - checksum |
436 |
|
|
* - name |
437 |
|
|
*/ |
438 |
root |
1.3 |
void |
439 |
root |
1.15 |
send_image_sums (client *ns, char *params) |
440 |
elmex |
1.1 |
{ |
441 |
root |
1.3 |
int start, stop; |
442 |
|
|
char *cp, buf[MAX_BUF]; |
443 |
|
|
|
444 |
root |
1.8 |
packet sl; |
445 |
root |
1.3 |
|
446 |
|
|
start = atoi (params); |
447 |
|
|
for (cp = params; *cp != '\0'; cp++) |
448 |
|
|
if (*cp == ' ') |
449 |
|
|
break; |
450 |
|
|
|
451 |
|
|
stop = atoi (cp); |
452 |
|
|
if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= nrofpixmaps) |
453 |
|
|
{ |
454 |
root |
1.7 |
sl.printf ("replyinfo image_sums %d %d", start, stop); |
455 |
|
|
ns->send_packet (sl); |
456 |
|
|
sl.reset (); |
457 |
root |
1.3 |
return; |
458 |
|
|
} |
459 |
|
|
|
460 |
root |
1.6 |
sl.printf ("replyinfo image_sums %d %d ", start, stop); |
461 |
root |
1.3 |
|
462 |
root |
1.6 |
for (int i = start; i <= stop; i++) |
463 |
root |
1.3 |
{ |
464 |
|
|
ns->faces_sent[i] |= NS_FACESENT_FACE; |
465 |
|
|
|
466 |
root |
1.6 |
int qq = get_face_fallback (ns->faceset, i); |
467 |
|
|
|
468 |
|
|
sl << uint16 (i) |
469 |
|
|
<< uint32 (facesets[qq].faces[i].checksum) |
470 |
|
|
<< uint8 (qq) |
471 |
|
|
<< data8 (&new_faces[i].name, new_faces[i].name.length () + 1); |
472 |
root |
1.3 |
} |
473 |
root |
1.6 |
|
474 |
root |
1.3 |
/* It would make more sense to catch this pre-emptively in the code above. |
475 |
|
|
* however, if this really happens, we probably just want to cut down the |
476 |
|
|
* size to less than 1000, since that is what we claim the protocol would |
477 |
|
|
* support. |
478 |
|
|
*/ |
479 |
root |
1.9 |
if (sl.length () >= MAXSOCKBUF) |
480 |
root |
1.3 |
{ |
481 |
root |
1.9 |
LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF); |
482 |
root |
1.3 |
abort (); |
483 |
elmex |
1.1 |
} |
484 |
root |
1.6 |
|
485 |
root |
1.11 |
ns->send_packet (sl); |
486 |
elmex |
1.1 |
} |
487 |
root |
1.6 |
|