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/* |
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* CrossFire, A Multiplayer game |
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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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|
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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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|
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#include <global.h> |
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#include <sproto.h> |
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|
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#include "crc.h" |
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|
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#define MAX_FACE_SETS 20 /**< Maximum number of image sets the program will handle */ |
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|
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/** Information about one image */ |
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typedef struct FaceInfo |
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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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} FaceInfo; |
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|
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/** Information about one face set */ |
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typedef struct |
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{ |
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char *prefix; /**< */ |
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char *fullname; |
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|
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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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|
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FaceInfo *faces; /**< images in this faceset */ |
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} FaceSets; |
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|
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static FaceSets facesets[MAX_FACE_SETS]; /**< All facesets */ |
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|
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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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int |
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is_valid_faceset (int fsn) |
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{ |
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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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} |
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|
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/** |
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* Frees all faceset information |
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*/ |
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void |
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free_socket_images (void) |
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{ |
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int num, q; |
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|
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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 < faces.size (); 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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|
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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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} |
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} |
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} |
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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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*/ |
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static int |
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get_face_fallback (int faceset, int imageno) |
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{ |
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/* 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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*/ |
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if (faceset == 0) |
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return 0; |
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|
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if (!facesets[faceset].prefix) |
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{ |
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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 */ |
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} |
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|
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if (facesets[faceset].faces[imageno].data) |
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return faceset; |
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|
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return get_face_fallback (facesets[faceset].fallback, imageno); |
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} |
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|
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/** |
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* Checks fallback are correctly defined. |
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* This is a simple recursive function that makes sure the fallbacks |
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* are all proper (eg, the fall back to defined sets, and also |
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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. |
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* This is only run when we first load the facesets. |
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*/ |
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static void |
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check_faceset_fallback (int faceset, int togo) |
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{ |
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int fallback = facesets[faceset].fallback; |
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|
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/* proper case - falls back to base set */ |
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if (fallback == 0) |
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return; |
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|
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if (!facesets[fallback].prefix) |
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{ |
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LOG (llevError, "Face set %d falls to non set faceset %d\n", faceset, fallback); |
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abort (); |
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} |
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|
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togo--; |
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if (togo == 0) |
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{ |
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LOG (llevError, "Infinite loop found in facesets. aborting.\n"); |
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abort (); |
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} |
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|
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check_faceset_fallback (fallback, togo); |
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} |
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|
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#define MAX_IMAGE_SIZE 10000 |
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|
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/** |
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* Client tells us what type of faces it wants. Also sets |
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* the caching attribute. |
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* |
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*/ |
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void |
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SetFaceMode (char *buf, int len, client *ns) |
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{ |
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int mask = (atoi (buf) & CF_FACE_CACHE), mode = (atoi (buf) & ~CF_FACE_CACHE); |
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|
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if (mode == CF_FACE_NONE) |
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ns->facecache = 1; |
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else if (mode != CF_FACE_PNG) |
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ns->send_packet_printf ("drawinfo %d %s", NDI_RED, "Warning - send unsupported face mode. Will use Png"); |
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|
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if (mask) |
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ns->facecache = 1; |
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} |
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|
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/** |
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* Client has requested pixmap that it somehow missed getting. |
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* This will be called often if the client is |
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* caching images. |
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*/ |
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void |
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SendFaceCmd (char *buf, int len, client *ns) |
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{ |
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uint16 facenum = atoi (buf); |
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|
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if (facenum != 0) |
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esrv_send_face (ns, facenum, 1); |
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} |
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|
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// how lame |
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static void print_facename (packet &sl, const facedata &d) |
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{ |
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for (int i = 0; i < CHKSUM_SIZE; ++i) |
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sl.printf ("%02x", d.chksum [i]); |
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} |
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|
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/** |
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* Sends a face to a client if they are in pixmap mode |
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* nothing gets sent in bitmap mode. |
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* If nocache is true (nonzero), ignore the cache setting from the client - |
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* this is needed for the askface, in which we really do want to send the |
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* face (and askface is the only place that should be setting it). Otherwise, |
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* we look at the facecache, and if set, send the image name. |
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*/ |
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void |
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esrv_send_face (client *ns, short face_num, int nocache) |
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{ |
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if (face_num <= 0 || face_num >= faces.size ()) |
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{ |
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LOG (llevError, "esrv_send_face (%d) out of bounds??\n", face_num); |
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return; |
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} |
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|
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const facedata *d = face_data (face_num, ns->faceset); |
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|
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packet sl; |
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|
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if (ns->facecache && !nocache) |
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{ |
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sl << (ns->image2 ? "face2 " : "face1 ") |
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<< uint16 (face_num); |
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|
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if (ns->image2) |
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sl << uint8 (0); |
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|
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sl << uint32 (0); |
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|
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// how lame |
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print_facename (sl, *d); |
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|
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ns->send_packet (sl); |
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} |
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else |
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{ |
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sl << (ns->image2 ? "image2 " : "image ") |
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<< uint32 (face_num); |
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|
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if (ns->image2) |
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sl << uint8 (0); |
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|
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sl << uint32 (d->data.size ()) |
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<< data (d->data.data (), d->data.size ()); |
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|
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ns->send_packet (sl); |
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} |
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|
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ns->faces_sent[face_num] |= NS_FACESENT_FACE; |
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} |
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|
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/** |
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* Sends the number of images, checksum of the face file, |
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* and the image_info file information. See the doc/Developers/protocol |
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* if you want further detail. |
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*/ |
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|
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void |
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send_image_info (client *ns, char *params) |
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{ |
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packet sl; |
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|
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//TODO: second parameter is a checksum, but it makes no sense in this current framework |
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sl.printf ("replyinfo image_info\n%d\n%u\n", MAX_FACES, 0); |
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|
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sl << "0:base:standard:0:32x32:none:The old 32x32 faceset.\n"; |
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|
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ns->send_packet (sl); |
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} |
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|
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/** |
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* Sends requested face information. |
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* \param ns socket to send to |
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* \param params contains first and last index of face |
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* |
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* For each image in [start..stop] sends |
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* - checksum |
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* - name |
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*/ |
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void |
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send_image_sums (client *ns, char *params) |
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{ |
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int start, stop; |
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char *cp; |
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|
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packet sl; |
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|
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start = atoi (params); |
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for (cp = params; *cp != '\0'; cp++) |
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if (*cp == ' ') |
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break; |
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|
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stop = atoi (cp); |
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if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= MAX_FACES) |
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{ |
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sl.printf ("replyinfo image_sums %d %d", start, stop); |
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ns->send_packet (sl); |
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sl.reset (); |
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return; |
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} |
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|
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sl.printf ("replyinfo image_sums %d %d ", start, stop); |
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|
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for (int i = start; i <= stop && i < faces.size (); i++) |
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{ |
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ns->faces_sent[i] |= NS_FACESENT_FACE; |
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|
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const facedata *d = face_data (i, ns->faceset); |
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|
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if (sl.room () < 2 + 4 + 1 + d->data.size () + 1) |
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break; |
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|
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sl << uint16 (i) |
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<< uint32 (0) // checksum |
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<< uint8 (ns->faceset); |
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|
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print_facename (sl, *d); sl << uint8 (0); |
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} |
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|
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/* It would make more sense to catch this pre-emptively in the code above. |
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* however, if this really happens, we probably just want to cut down the |
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* size to less than 1000, since that is what we claim the protocol would |
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* support. |
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*/ |
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//TODO: taken care of above, should simply abort or make sure the above code is correct |
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if (sl.length () >= MAXSOCKBUF) |
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{ |
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LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF); |
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abort (); |
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} |
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|
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ns->send_packet (sl); |
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} |
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|
