| 1 |
/* |
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CrossFire, A Multiplayer game for X-windows |
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|
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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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#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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|
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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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|
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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 < 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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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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if (facesets[faceset].faces[imageno].data) |
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return faceset; |
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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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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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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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* 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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* |
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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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*/ |
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|
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void |
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read_client_images (void) |
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{ |
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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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|
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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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} |
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while (fgets (buf, HUGE_BUF - 1, infile) != NULL) |
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{ |
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badline = 0; |
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|
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if (buf[0] == '#') |
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continue; |
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if (!(cps[0] = strtok (buf, ":"))) |
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badline = 1; |
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for (i = 1; i < 7; i++) |
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{ |
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if (!(cps[i] = strtok (NULL, ":"))) |
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badline = 1; |
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} |
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if (badline) |
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{ |
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LOG (llevError, "Bad line in image_info file, ignoring line:\n %s", buf); |
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} |
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else |
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{ |
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len = atoi (cps[0]); |
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if (len >= MAX_FACE_SETS) |
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{ |
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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 (); |
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} |
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facesets[len].prefix = strdup (cps[1]); |
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facesets[len].fullname = strdup (cps[2]); |
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facesets[len].fallback = atoi (cps[3]); |
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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]); |
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} |
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} |
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close_and_delete (infile, compressed); |
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for (i = 0; i < MAX_FACE_SETS; i++) |
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{ |
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if (facesets[i].prefix) |
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check_faceset_fallback (i, MAX_FACE_SETS); |
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} |
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/* Loaded the faceset information - now need to load up the |
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* actual faces. |
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*/ |
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|
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for (fileno = 0; fileno < MAX_FACE_SETS; fileno++) |
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{ |
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/* if prefix is not set, this is not used */ |
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if (!facesets[fileno].prefix) |
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continue; |
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facesets[fileno].faces = (FaceInfo *) calloc (nrofpixmaps, sizeof (FaceInfo)); |
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|
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sprintf (filename, "%s/crossfire.%d", settings.datadir, fileno); |
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LOG (llevDebug, "Loading image file %s\n", filename); |
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|
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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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} |
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while (fgets (buf, HUGE_BUF - 1, infile) != NULL) |
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{ |
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if (strncmp (buf, "IMAGE ", 6) != 0) |
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{ |
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LOG (llevError, "read_client_images:Bad image line - not IMAGE, instead\n%s", buf); |
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abort (); |
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} |
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num = atoi (buf + 6); |
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if (num < 0 || num >= nrofpixmaps) |
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{ |
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LOG (llevError, "read_client_images: Image num %d not in 0..%d\n%s", num, nrofpixmaps, buf); |
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abort (); |
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} |
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/* Skip accross the number data */ |
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for (cp = buf + 6; *cp != ' '; cp++); |
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len = atoi (cp); |
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if (len == 0 || len > MAX_IMAGE_SIZE) |
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{ |
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LOG (llevError, "read_client_images: length not valid: %d > %d \n%s", len, MAX_IMAGE_SIZE, buf); |
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abort (); |
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} |
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/* We don't actualy care about the name of the image that |
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* is embedded in the image file, so just ignore it. |
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*/ |
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facesets[fileno].faces[num].datalen = len; |
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facesets[fileno].faces[num].data = (uint8 *) malloc (len); |
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if ((i = fread (facesets[fileno].faces[num].data, len, 1, infile)) != 1) |
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{ |
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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); |
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abort (); |
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} |
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facesets[fileno].faces[num].checksum = 0; |
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for (i = 0; i < len; i++) |
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{ |
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ROTATE_RIGHT (facesets[fileno].faces[num].checksum); |
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facesets[fileno].faces[num].checksum += facesets[fileno].faces[num].data[i]; |
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facesets[fileno].faces[num].checksum &= 0xffffffff; |
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} |
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} |
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close_and_delete (infile, compressed); |
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} /* For fileno < MAX_FACE_SETS */ |
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} |
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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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|
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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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|
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void |
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SendFaceCmd (char *buff, int len, client * ns) |
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{ |
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long tmpnum = atoi (buff); |
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short facenum = tmpnum & 0xffff; |
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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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/** |
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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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|
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void |
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esrv_send_face (client *ns, short face_num, int nocache) |
| 351 |
{ |
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char fallback; |
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|
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if (face_num <= 0 || face_num >= nrofpixmaps) |
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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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packet sl; |
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fallback = get_face_fallback (ns->faceset, face_num); |
| 362 |
|
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if (facesets[fallback].faces[face_num].data == NULL) |
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{ |
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LOG (llevError, "esrv_send_face: faces[%d].data == NULL\n", face_num); |
| 366 |
return; |
| 367 |
} |
| 368 |
|
| 369 |
if (ns->facecache && !nocache) |
| 370 |
{ |
| 371 |
sl << (ns->image2 ? "face2 " : "face1 ") |
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<< uint16 (face_num); |
| 373 |
|
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if (ns->image2) |
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sl << uint8 (fallback); |
| 376 |
|
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sl << uint32 (facesets[fallback].faces[face_num].checksum) |
| 378 |
<< new_faces[face_num].name; |
| 379 |
|
| 380 |
ns->send_packet (sl); |
| 381 |
} |
| 382 |
else |
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{ |
| 384 |
sl << (ns->image2 ? "image2 " : "image ") |
| 385 |
<< uint32 (face_num); |
| 386 |
|
| 387 |
if (ns->image2) |
| 388 |
sl << uint8 (fallback); |
| 389 |
|
| 390 |
sl << uint32 (facesets[fallback].faces[face_num].datalen) |
| 391 |
<< data (facesets[fallback].faces[face_num].data, facesets[fallback].faces[face_num].datalen); |
| 392 |
|
| 393 |
ns->send_packet (sl); |
| 394 |
} |
| 395 |
|
| 396 |
ns->faces_sent[face_num] |= NS_FACESENT_FACE; |
| 397 |
} |
| 398 |
|
| 399 |
/** |
| 400 |
* Sends the number of images, checksum of the face file, |
| 401 |
* and the image_info file information. See the doc/Developers/protocol |
| 402 |
* if you want further detail. |
| 403 |
*/ |
| 404 |
|
| 405 |
void |
| 406 |
send_image_info (client * ns, char *params) |
| 407 |
{ |
| 408 |
packet sl; |
| 409 |
|
| 410 |
sl.printf ("replyinfo image_info\n%d\n%d\n", nrofpixmaps - 1, bmaps_checksum); |
| 411 |
|
| 412 |
for (int i = 0; i < MAX_FACE_SETS; i++) |
| 413 |
if (facesets[i].prefix) |
| 414 |
sl.printf ("%d:%s:%s:%d:%s:%s:%s", |
| 415 |
i, facesets[i].prefix, facesets[i].fullname, facesets[i].fallback, |
| 416 |
facesets[i].size, facesets[i].extension, facesets[i].comment); |
| 417 |
|
| 418 |
ns->send_packet (sl); |
| 419 |
} |
| 420 |
|
| 421 |
/** |
| 422 |
* Sends requested face information. |
| 423 |
* \param ns socket to send to |
| 424 |
* \param params contains first and last index of face |
| 425 |
* |
| 426 |
* For each image in [start..stop] sends |
| 427 |
* - checksum |
| 428 |
* - name |
| 429 |
*/ |
| 430 |
void |
| 431 |
send_image_sums (client * ns, char *params) |
| 432 |
{ |
| 433 |
int start, stop; |
| 434 |
char *cp, buf[MAX_BUF]; |
| 435 |
|
| 436 |
packet sl; |
| 437 |
|
| 438 |
start = atoi (params); |
| 439 |
for (cp = params; *cp != '\0'; cp++) |
| 440 |
if (*cp == ' ') |
| 441 |
break; |
| 442 |
|
| 443 |
stop = atoi (cp); |
| 444 |
if (stop < start || *cp == '\0' || (stop - start) > 1000 || stop >= nrofpixmaps) |
| 445 |
{ |
| 446 |
sl.printf ("replyinfo image_sums %d %d", start, stop); |
| 447 |
ns->send_packet (sl); |
| 448 |
sl.reset (); |
| 449 |
return; |
| 450 |
} |
| 451 |
|
| 452 |
sl.printf ("replyinfo image_sums %d %d ", start, stop); |
| 453 |
|
| 454 |
for (int i = start; i <= stop; i++) |
| 455 |
{ |
| 456 |
ns->faces_sent[i] |= NS_FACESENT_FACE; |
| 457 |
|
| 458 |
int qq = get_face_fallback (ns->faceset, i); |
| 459 |
|
| 460 |
sl << uint16 (i) |
| 461 |
<< uint32 (facesets[qq].faces[i].checksum) |
| 462 |
<< uint8 (qq) |
| 463 |
<< data8 (&new_faces[i].name, new_faces[i].name.length () + 1); |
| 464 |
} |
| 465 |
|
| 466 |
/* It would make more sense to catch this pre-emptively in the code above. |
| 467 |
* however, if this really happens, we probably just want to cut down the |
| 468 |
* size to less than 1000, since that is what we claim the protocol would |
| 469 |
* support. |
| 470 |
*/ |
| 471 |
if (sl.length () >= MAXSOCKBUF) |
| 472 |
{ |
| 473 |
LOG (llevError, "send_image_send: buffer overrun, %d > %d\n", sl.length (), MAXSOCKBUF); |
| 474 |
abort (); |
| 475 |
} |
| 476 |
|
| 477 |
ns->send_packet (sl); |
| 478 |
} |
| 479 |
|
