1 |
elmex |
1.1 |
/* |
2 |
root |
1.17 |
* CrossFire, A Multiplayer game |
3 |
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* |
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* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
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* Copyright (C) 2001 Mark Wedel |
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* Copyright (C) 1992 Frank Tore Johansen |
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* |
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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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* |
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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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* |
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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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* |
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* The author can be reached via e-mail to <crossfire@schmorp.de> |
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*/ |
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elmex |
1.1 |
|
25 |
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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> |
38 |
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39 |
root |
1.20 |
#include "crc.h" |
40 |
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|
41 |
elmex |
1.1 |
#define MAX_FACE_SETS 20 /**< Maximum number of image sets the program will handle */ |
42 |
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43 |
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/** Information about one image */ |
44 |
root |
1.3 |
typedef struct FaceInfo |
45 |
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{ |
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uint8 *data; /**< image data */ |
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uint16 datalen; /**< length of the xpm data */ |
48 |
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uint32 checksum; /**< Checksum of face data */ |
49 |
elmex |
1.1 |
} FaceInfo; |
50 |
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51 |
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/** Information about one face set */ |
52 |
root |
1.3 |
typedef struct |
53 |
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{ |
54 |
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char *prefix; /**< */ |
55 |
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char *fullname; |
56 |
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57 |
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uint8 fallback; /**< faceset to use when an image is not found in this faceset */ |
58 |
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char *size; |
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char *extension; |
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char *comment; |
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62 |
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FaceInfo *faces; /**< images in this faceset */ |
63 |
elmex |
1.1 |
} FaceSets; |
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65 |
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static FaceSets facesets[MAX_FACE_SETS]; /**< All facesets */ |
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67 |
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/** |
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* Checks specified faceset is valid |
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* \param fsn faceset number |
70 |
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*/ |
71 |
root |
1.3 |
int |
72 |
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is_valid_faceset (int fsn) |
73 |
elmex |
1.1 |
{ |
74 |
root |
1.3 |
if (fsn >= 0 && fsn < MAX_FACE_SETS && facesets[fsn].prefix) |
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return TRUE; |
76 |
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return FALSE; |
77 |
elmex |
1.1 |
} |
78 |
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79 |
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/** |
80 |
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* Frees all faceset information |
81 |
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*/ |
82 |
root |
1.3 |
void |
83 |
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free_socket_images (void) |
84 |
elmex |
1.1 |
{ |
85 |
root |
1.3 |
int num, q; |
86 |
elmex |
1.1 |
|
87 |
root |
1.3 |
for (num = 0; num < MAX_FACE_SETS; num++) |
88 |
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{ |
89 |
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if (facesets[num].prefix) |
90 |
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{ |
91 |
root |
1.24 |
for (q = 0; q < faces.size (); q++) |
92 |
root |
1.3 |
if (facesets[num].faces[q].data) |
93 |
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free (facesets[num].faces[q].data); |
94 |
root |
1.15 |
|
95 |
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 |
} |
102 |
elmex |
1.1 |
} |
103 |
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} |
104 |
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105 |
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/** |
106 |
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* This returns the set we will actually use when sending |
107 |
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* a face. This is used because the image files may be sparse. |
108 |
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* This function is recursive. imageno is the face number we are |
109 |
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* trying to send |
110 |
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* |
111 |
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* If face is not found in specified faceset, tries with 'fallback' faceset. |
112 |
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* |
113 |
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* \param faceset faceset to check |
114 |
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* \param imageno image number |
115 |
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* |
116 |
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*/ |
117 |
root |
1.3 |
static int |
118 |
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get_face_fallback (int faceset, int imageno) |
119 |
elmex |
1.1 |
{ |
120 |
root |
1.3 |
/* faceset 0 is supposed to have every image, so just return. Doing |
121 |
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* so also prevents infinite loops in the case if it not having |
122 |
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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 |
124 |
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* loop. |
125 |
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*/ |
126 |
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if (faceset == 0) |
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return 0; |
128 |
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129 |
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if (!facesets[faceset].prefix) |
130 |
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{ |
131 |
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LOG (llevError, "get_face_fallback called with unused set (%d)?\n", faceset); |
132 |
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return 0; /* use default set */ |
133 |
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} |
134 |
root |
1.15 |
|
135 |
root |
1.3 |
if (facesets[faceset].faces[imageno].data) |
136 |
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return faceset; |
137 |
root |
1.15 |
|
138 |
root |
1.3 |
return get_face_fallback (facesets[faceset].fallback, imageno); |
139 |
elmex |
1.1 |
} |
140 |
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141 |
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/** |
142 |
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* Checks fallback are correctly defined. |
143 |
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* This is a simple recursive function that makes sure the fallbacks |
144 |
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* are all proper (eg, the fall back to defined sets, and also |
145 |
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* eventually fall back to 0). At the top level, togo is set to MAX_FACE_SETS, |
146 |
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* if togo gets to zero, it means we have a loop. |
147 |
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* This is only run when we first load the facesets. |
148 |
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*/ |
149 |
root |
1.3 |
static void |
150 |
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check_faceset_fallback (int faceset, int togo) |
151 |
elmex |
1.1 |
{ |
152 |
root |
1.3 |
int fallback = facesets[faceset].fallback; |
153 |
elmex |
1.1 |
|
154 |
root |
1.3 |
/* proper case - falls back to base set */ |
155 |
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if (fallback == 0) |
156 |
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return; |
157 |
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158 |
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if (!facesets[fallback].prefix) |
159 |
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{ |
160 |
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LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback); |
161 |
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abort (); |
162 |
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} |
163 |
root |
1.15 |
|
164 |
root |
1.3 |
togo--; |
165 |
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if (togo == 0) |
166 |
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{ |
167 |
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LOG (llevError, "Infinite loop found in facesets. aborting.\n"); |
168 |
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abort (); |
169 |
elmex |
1.1 |
} |
170 |
root |
1.15 |
|
171 |
root |
1.3 |
check_faceset_fallback (fallback, togo); |
172 |
elmex |
1.1 |
} |
173 |
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174 |
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#define MAX_IMAGE_SIZE 10000 |
175 |
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176 |
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/** |
177 |
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* Client tells us what type of faces it wants. Also sets |
178 |
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* the caching attribute. |
179 |
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* |
180 |
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*/ |
181 |
root |
1.3 |
void |
182 |
root |
1.13 |
SetFaceMode (char *buf, int len, client *ns) |
183 |
elmex |
1.1 |
{ |
184 |
root |
1.3 |
int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE); |
185 |
elmex |
1.1 |
|
186 |
root |
1.3 |
if (mode == CF_FACE_NONE) |
187 |
root |
1.7 |
ns->facecache = 1; |
188 |
root |
1.3 |
else if (mode != CF_FACE_PNG) |
189 |
root |
1.14 |
ns->send_packet_printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode. Will use Png"); |
190 |
root |
1.7 |
|
191 |
root |
1.3 |
if (mask) |
192 |
root |
1.7 |
ns->facecache = 1; |
193 |
elmex |
1.1 |
} |
194 |
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195 |
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/** |
196 |
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* Client has requested pixmap that it somehow missed getting. |
197 |
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* This will be called often if the client is |
198 |
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* caching images. |
199 |
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*/ |
200 |
root |
1.3 |
void |
201 |
root |
1.15 |
SendFaceCmd (char *buf, int len, client *ns) |
202 |
elmex |
1.1 |
{ |
203 |
root |
1.15 |
uint16 facenum = atoi (buf); |
204 |
elmex |
1.1 |
|
205 |
root |
1.3 |
if (facenum != 0) |
206 |
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esrv_send_face (ns, facenum, 1); |
207 |
elmex |
1.1 |
} |
208 |
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209 |
root |
1.24 |
// how lame |
210 |
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static void print_facename (packet &sl, const facedata &d) |
211 |
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{ |
212 |
root |
1.25 |
for (int i = 0; i < CHKSUM_SIZE; ++i) |
213 |
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sl.printf ("%02x", d.chksum [i]); |
214 |
root |
1.24 |
} |
215 |
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216 |
elmex |
1.1 |
/** |
217 |
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* Sends a face to a client if they are in pixmap mode |
218 |
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* nothing gets sent in bitmap mode. |
219 |
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* If nocache is true (nonzero), ignore the cache setting from the client - |
220 |
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* this is needed for the askface, in which we really do want to send the |
221 |
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* face (and askface is the only place that should be setting it). Otherwise, |
222 |
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* we look at the facecache, and if set, send the image name. |
223 |
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*/ |
224 |
root |
1.3 |
void |
225 |
root |
1.13 |
esrv_send_face (client *ns, short face_num, int nocache) |
226 |
elmex |
1.1 |
{ |
227 |
root |
1.24 |
if (face_num <= 0 || face_num >= faces.size ()) |
228 |
root |
1.3 |
{ |
229 |
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LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num); |
230 |
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return; |
231 |
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} |
232 |
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233 |
root |
1.24 |
const facedata *d = face_data (face_num, ns->faceset); |
234 |
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235 |
root |
1.8 |
packet sl; |
236 |
root |
1.3 |
|
237 |
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if (ns->facecache && !nocache) |
238 |
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{ |
239 |
root |
1.6 |
sl << (ns->image2 ? "face2 " : "face1 ") |
240 |
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<< uint16 (face_num); |
241 |
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242 |
root |
1.3 |
if (ns->image2) |
243 |
root |
1.24 |
sl << uint8 (0); |
244 |
root |
1.6 |
|
245 |
root |
1.24 |
sl << uint32 (0); |
246 |
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247 |
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// how lame |
248 |
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print_facename (sl, *d); |
249 |
root |
1.3 |
|
250 |
root |
1.11 |
ns->send_packet (sl); |
251 |
root |
1.3 |
} |
252 |
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else |
253 |
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{ |
254 |
root |
1.6 |
sl << (ns->image2 ? "image2 " : "image ") |
255 |
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<< uint32 (face_num); |
256 |
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|
257 |
root |
1.3 |
if (ns->image2) |
258 |
root |
1.24 |
sl << uint8 (0); |
259 |
root |
1.6 |
|
260 |
root |
1.24 |
sl << uint32 (d->data.size ()) |
261 |
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<< data (d->data.data (), d->data.size ()); |
262 |
root |
1.6 |
|
263 |
root |
1.11 |
ns->send_packet (sl); |
264 |
elmex |
1.1 |
} |
265 |
root |
1.6 |
|
266 |
root |
1.3 |
ns->faces_sent[face_num] |= NS_FACESENT_FACE; |
267 |
elmex |
1.1 |
} |
268 |
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269 |
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/** |
270 |
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* Sends the number of images, checksum of the face file, |
271 |
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* and the image_info file information. See the doc/Developers/protocol |
272 |
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* if you want further detail. |
273 |
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*/ |
274 |
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|
275 |
root |
1.3 |
void |
276 |
root |
1.15 |
send_image_info (client *ns, char *params) |
277 |
elmex |
1.1 |
{ |
278 |
root |
1.8 |
packet sl; |
279 |
elmex |
1.1 |
|
280 |
root |
1.24 |
//TODO: second parameter is a checksum, but it makes no sense in this current framework |
281 |
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sl.printf ("replyinfo image_info\n%d\n%u\n", MAX_FACES, 0); |
282 |
root |
1.6 |
|
283 |
root |
1.24 |
sl << "0:base:standard:0:32x32:none:The old 32x32 faceset.\n"; |
284 |
elmex |
1.1 |
|
285 |
root |
1.11 |
ns->send_packet (sl); |
286 |
elmex |
1.1 |
} |
287 |
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288 |
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/** |
289 |
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* Sends requested face information. |
290 |
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* \param ns socket to send to |
291 |
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* \param params contains first and last index of face |
292 |
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* |
293 |
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* For each image in [start..stop] sends |
294 |
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* - checksum |
295 |
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* - name |
296 |
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*/ |
297 |
root |
1.3 |
void |
298 |
root |
1.15 |
send_image_sums (client *ns, char *params) |
299 |
elmex |
1.1 |
{ |
300 |
root |
1.3 |
int start, stop; |
301 |
pippijn |
1.22 |
char *cp; |
302 |
root |
1.3 |
|
303 |
root |
1.8 |
packet sl; |
304 |
root |
1.3 |
|
305 |
|
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start = atoi (params); |
306 |
|
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for (cp = params; *cp != '\0'; cp++) |
307 |
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if (*cp == ' ') |
308 |
|
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break; |
309 |
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|
310 |
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stop = atoi (cp); |
311 |
root |
1.24 |
if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= MAX_FACES) |
312 |
root |
1.3 |
{ |
313 |
root |
1.7 |
sl.printf ("replyinfo image_sums %d %d", start, stop); |
314 |
|
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ns->send_packet (sl); |
315 |
|
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sl.reset (); |
316 |
root |
1.3 |
return; |
317 |
|
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} |
318 |
|
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|
319 |
root |
1.6 |
sl.printf ("replyinfo image_sums %d %d ", start, stop); |
320 |
root |
1.3 |
|
321 |
root |
1.24 |
for (int i = start; i <= stop && i < faces.size (); i++) |
322 |
root |
1.3 |
{ |
323 |
|
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ns->faces_sent[i] |= NS_FACESENT_FACE; |
324 |
|
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|
325 |
root |
1.24 |
const facedata *d = face_data (i, ns->faceset); |
326 |
root |
1.6 |
|
327 |
root |
1.24 |
if (sl.room () < 2 + 4 + 1 + d->data.size () + 1) |
328 |
root |
1.23 |
break; |
329 |
|
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|
330 |
root |
1.6 |
sl << uint16 (i) |
331 |
root |
1.24 |
<< uint32 (0) // checksum |
332 |
|
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<< uint8 (ns->faceset); |
333 |
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|
334 |
|
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print_facename (sl, *d); sl << uint8 (0); |
335 |
root |
1.3 |
} |
336 |
root |
1.6 |
|
337 |
root |
1.3 |
/* It would make more sense to catch this pre-emptively in the code above. |
338 |
|
|
* however, if this really happens, we probably just want to cut down the |
339 |
|
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* size to less than 1000, since that is what we claim the protocol would |
340 |
|
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* support. |
341 |
|
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*/ |
342 |
root |
1.23 |
//TODO: taken care of above, should simply abort or make sure the above code is correct |
343 |
root |
1.9 |
if (sl.length () >= MAXSOCKBUF) |
344 |
root |
1.3 |
{ |
345 |
root |
1.9 |
LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF); |
346 |
root |
1.3 |
abort (); |
347 |
elmex |
1.1 |
} |
348 |
root |
1.6 |
|
349 |
root |
1.11 |
ns->send_packet (sl); |
350 |
elmex |
1.1 |
} |
351 |
root |
1.6 |
|