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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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ns->send_image (atoi (buf)); |
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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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// gcfclient uses the server-provided checksum for comparison, but always |
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// writes a broken checksum to its cache file, so we have to provide |
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// gcfclient with the same broken (and useless) checksum just to have it |
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// cache the image despite its bugs. |
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static uint32 gcfclient_checksum (const facedata *d) |
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{ |
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uint32 csum = 0; |
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|
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for (std::string::const_iterator i = d->data.begin (); |
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i != d->data.end (); |
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++i) |
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{ |
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csum = rotate_right (csum); |
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csum += *(uint8 *)&*i; |
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} |
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|
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return csum; |
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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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client::send_face (faceidx facenum) |
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{ |
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// never send face 0. ever. it does not exist. |
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if (!facenum) |
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return; |
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|
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const facedata *d = face_data (facenum, faceset); |
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|
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if (!d) |
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{ |
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LOG (llevError, "client::send_face (%d) out of bounds??\n", facenum); |
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return; |
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} |
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|
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if (faces_sent[facenum]) |
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return; |
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|
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faces_sent[facenum] = true; |
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|
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if (!facecache) |
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{ |
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send_drawinfo ( |
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"\n" |
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"\n" |
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"***\n" |
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"*** WARNING:\n" |
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"*** Your client does not support face/image caching,\n" |
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"*** or it has been disabled. Face caching is mandatory\n" |
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"*** so please enable it or use a newer client.\n" |
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"***\n" |
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"*** Look at your client preferences:\n" |
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"***\n" |
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"*** CFPlus: all known versions automatically enable the facecache.\n" |
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"*** cfclient: use the -cache commandline option.\n" |
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"*** cfclient: map will not redraw automatically (bug).\n" |
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"*** gcfclient: use -cache commandline option, or enable\n" |
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"*** gcfclient: Client=>Configure=>Map & Image=>Cache Images.\n" |
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"*** jcrossclient: your client is broken, use CFPlus or gcfclient.\n" |
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"***\n" |
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"***\n", |
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NDI_RED |
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); |
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return; |
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//return send_image (facenum); |
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} |
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|
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packet sl; |
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|
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if (force_face0) |
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sl << "face " << uint16 (facenum); |
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else if (image2) |
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sl << "face2 " << uint16 (facenum) << uint8 (0) << uint32 (force_bad_checksum ? gcfclient_checksum (d) : 0); |
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else |
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sl << "face1 " << uint16 (facenum) << uint32 (force_bad_checksum ? gcfclient_checksum (d) : 0); |
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|
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// how lame |
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print_facename (sl, *d); |
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send_packet (sl); |
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|
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faceinfo *f = face_info (facenum); |
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if (f->smooth && EMI_smooth) |
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{ |
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send_face (f->smooth); |
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|
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packet sl ("smooth"); |
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|
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sl << uint16 (facenum) |
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<< uint16 (f->smooth); |
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|
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send_packet (sl); |
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} |
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} |
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|
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void |
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client::send_image (faceidx facenum) |
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{ |
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// never send face 0. ever. it does not exist. |
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if (!facenum) |
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return; |
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|
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const facedata *d = face_data (facenum, faceset); |
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|
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if (!d) |
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{ |
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LOG (llevError, "client::send_image (%d) out of bounds??\n", facenum); |
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return; |
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} |
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|
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faces_sent[facenum] = true; |
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|
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packet sl; |
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|
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sl << (image2 ? "image2 " : "image ") |
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<< uint32 (facenum); |
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|
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if (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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send_packet (sl); |
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} |
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|
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// send all faces of this object to the client |
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// this uses more bandwidth initially, but makes |
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// animations look much smoother, and every client |
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// is supposed to do client-side caching anyways. |
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void |
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client::send_faces (object *ob) |
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{ |
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send_face (ob->face); |
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|
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if (ob->animation_id) |
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{ |
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animation &anim = animations [ob->animation_id]; |
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|
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for (int i = 0; i < anim.num_animations; i++) |
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send_face (anim.faces [i]); |
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} |
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} |
| 362 |
|
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/** |
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* Need to send an animation sequence to the client. |
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* We will send appropriate face commands to the client if we haven't |
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* sent them the face yet (this can become quite costly in terms of |
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* how much we are sending - on the other hand, this should only happen |
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* when the player logs in and picks stuff up. |
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*/ |
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void |
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client::send_animation (short anim_num) |
| 372 |
{ |
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/* Do some checking on the anim_num we got. Note that the animations |
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* are added in contigous order, so if the number is in the valid |
| 375 |
* range, it must be a valid animation. |
| 376 |
*/ |
| 377 |
if (anim_num < 0 || anim_num > num_animations) |
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{ |
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LOG (llevError, "esrv_send_anim (%d) out of bounds??\n", anim_num); |
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return; |
| 381 |
} |
| 382 |
|
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packet sl ("anim"); |
| 384 |
|
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sl << uint16 (anim_num) |
| 386 |
<< uint16 (0); /* flags - not used right now */ |
| 387 |
|
| 388 |
/* Build up the list of faces. Also, send any information (ie, the |
| 389 |
* the face itself) down to the client. |
| 390 |
*/ |
| 391 |
for (int i = 0; i < animations[anim_num].num_animations; i++) |
| 392 |
{ |
| 393 |
send_face (animations[anim_num].faces[i]); |
| 394 |
sl << uint16 (animations[anim_num].faces[i]); /* flags - not used right now */ |
| 395 |
} |
| 396 |
|
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send_packet (sl); |
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|
| 399 |
anims_sent[anim_num] = 1; |
| 400 |
} |
| 401 |
|
| 402 |
/** |
| 403 |
* Sends the number of images, checksum of the face file, |
| 404 |
* and the image_info file information. See the doc/Developers/protocol |
| 405 |
* if you want further detail. |
| 406 |
*/ |
| 407 |
void |
| 408 |
send_image_info (client *ns, char *params) |
| 409 |
{ |
| 410 |
packet sl; |
| 411 |
|
| 412 |
//TODO: second parameter is a checksum, but it makes no sense in this current framework |
| 413 |
sl.printf ("replyinfo image_info\n%d\n%u\n", MAX_FACES, 0); |
| 414 |
|
| 415 |
sl << "0:base:standard:0:32x32:none:The old 32x32 faceset.\n"; |
| 416 |
|
| 417 |
ns->send_packet (sl); |
| 418 |
} |
| 419 |
|
| 420 |
/** |
| 421 |
* Sends requested face information. |
| 422 |
* \param ns socket to send to |
| 423 |
* \param params contains first and last index of face |
| 424 |
* |
| 425 |
* For each image in [start..stop] sends |
| 426 |
* - checksum |
| 427 |
* - name |
| 428 |
*/ |
| 429 |
void |
| 430 |
send_image_sums (client *ns, char *params) |
| 431 |
{ |
| 432 |
int start, stop; |
| 433 |
char *cp; |
| 434 |
|
| 435 |
packet sl; |
| 436 |
|
| 437 |
start = atoi (params); |
| 438 |
for (cp = params; *cp != '\0'; cp++) |
| 439 |
if (*cp == ' ') |
| 440 |
break; |
| 441 |
|
| 442 |
stop = atoi (cp); |
| 443 |
if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= MAX_FACES) |
| 444 |
{ |
| 445 |
sl.printf ("replyinfo image_sums %d %d", start, stop); |
| 446 |
ns->send_packet (sl); |
| 447 |
sl.reset (); |
| 448 |
return; |
| 449 |
} |
| 450 |
|
| 451 |
sl.printf ("replyinfo image_sums %d %d ", start, stop); |
| 452 |
|
| 453 |
for (int i = start; i <= stop && i < faces.size (); i++) |
| 454 |
{ |
| 455 |
ns->faces_sent[i] = true; |
| 456 |
|
| 457 |
const facedata *d = face_data (i, ns->faceset); |
| 458 |
|
| 459 |
if (sl.room () < 2 + 4 + 1 + d->data.size () + 1) |
| 460 |
break; |
| 461 |
|
| 462 |
sl << uint16 (i) |
| 463 |
<< uint32 (0) // checksum |
| 464 |
<< uint8 (ns->faceset); |
| 465 |
|
| 466 |
print_facename (sl, *d); sl << uint8 (0); |
| 467 |
} |
| 468 |
|
| 469 |
/* It would make more sense to catch this pre-emptively in the code above. |
| 470 |
* however, if this really happens, we probably just want to cut down the |
| 471 |
* size to less than 1000, since that is what we claim the protocol would |
| 472 |
* support. |
| 473 |
*/ |
| 474 |
//TODO: taken care of above, should simply abort or make sure the above code is correct |
| 475 |
if (sl.length () >= MAXSOCKBUF) |
| 476 |
{ |
| 477 |
LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF); |
| 478 |
abort (); |
| 479 |
} |
| 480 |
|
| 481 |
ns->send_packet (sl); |
| 482 |
} |
| 483 |
|
