summaryrefslogtreecommitdiff
path: root/src/resources/mapreader.cpp
blob: d5d30e79c3d83316b8d872044e03194d89c836ff (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
/*
 *  The Mana World
 *  Copyright 2004 The Mana World Development Team
 *
 *  This file is part of The Mana World.
 *
 *  The Mana World is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  The Mana World is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with The Mana World; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  $Id$
 */

#include "../main.h"
#include "mapreader.h"
#include "../log.h"
#include "resourcemanager.h"
#include "../graphic/spriteset.h"
#include "../base64.h"

#include <iostream>

#define DEFAULT_TILE_WIDTH  32
#define DEFAULT_TILE_HEIGHT 32

// MSVC libxml2 at the moment doesn't work right when using MinGW, missing this
// function at link time.
#ifdef WIN32
#undef xmlFree
#define xmlFree(x) ;
#endif

std::vector<Tileset*> MapReader::tilesets;

Tileset::Tileset(Image *img, int w, int h, int firstGid):
    Spriteset(img, w, h),
    firstGid(firstGid)
{
}

int Tileset::getFirstGid()
{
    return firstGid;
}


Map *MapReader::readMap(const std::string &filename)
{
    std::string name = /*std::string("data/") +*/ filename;

    // Check that file exists before trying to parse it
    std::fstream fin;
    fin.open(name.c_str(), std::ios::in);
    if (!fin.is_open()) {
        logger->log("No such file!");
        return NULL;
    }
    fin.close();

    xmlDocPtr doc = xmlParseFile(name.c_str());

    if (doc) {
        xmlNodePtr node = xmlDocGetRootElement(doc);

        if (!node || !xmlStrEqual(node->name, BAD_CAST "map")) {
            logger->log("Warning: Not a map file (%s)!", filename.c_str());
            return NULL;
        }

        return readMap(node, filename);
        xmlFreeDoc(doc);
    } else {
        logger->log("Error while parsing map file (%s)!", filename.c_str());
    }

    return NULL;
}

Map* MapReader::readMap(xmlNodePtr node, const std::string &path)
{
    xmlChar *prop;

    // Take the filename off the path
    std::string pathDir = path.substr(0, path.rfind("/") + 1);

    prop = xmlGetProp(node, BAD_CAST "version");
    xmlFree(prop);

    int w = getProperty(node, "width", 0);
    int h = getProperty(node, "height", 0);
    // We only support tile width of 32 at the moment
    //int tilew = getProperty(node, "tilewidth", DEFAULT_TILE_WIDTH);
    //int tileh = getProperty(node, "tileheight", DEFAULT_TILE_HEIGHT);
    int layerNr = 0;
    Map* map = new Map(w, h);

    for (node = node->xmlChildrenNode; node != NULL; node = node->next)
    {
        if (xmlStrEqual(node->name, BAD_CAST "tileset"))
        {
            Tileset *tileset = readTileset(node, pathDir, map);
            if (tileset) {
                tilesets.push_back(tileset);
            }
        }
        else if (xmlStrEqual(node->name, BAD_CAST "layer"))
        {
            logger->log("- Loading layer %d", layerNr);
            readLayer(node, map, layerNr);
            layerNr++;
        }
    }

    // Clean up tilesets
    // TODO: Dereference them somewhere
    tilesets.clear();

    return map;
}

void MapReader::readLayer(xmlNodePtr node, Map *map, int layer)
{
    node = node->xmlChildrenNode;
    int h = map->getHeight();
    int w = map->getWidth();
    int x = 0;
    int y = 0;
    
    // Load the tile data. Layers are assumed to be map size, with (0,0) as
    // origin.
    while (node != NULL)
    {
        if (xmlStrEqual(node->name, BAD_CAST "data"))
        {
            xmlChar *encoding = xmlGetProp(node, BAD_CAST "encoding");
            xmlChar *compression = xmlGetProp(node, BAD_CAST "compression");

            if (encoding && xmlStrEqual(encoding, BAD_CAST "base64"))
            {
                xmlFree(encoding);

                if (compression) {
                    logger->log("Warning: no layer compression supported!");
                    xmlFree(compression);
                    return;
                }

                // Read base64 encoded map file
                xmlNodePtr dataChild = node->xmlChildrenNode;
                if (!dataChild) continue;

                int len = strlen((const char*)dataChild->content) + 1;
                unsigned char *charData = new unsigned char[len + 1];
                const char *charStart = (const char*)dataChild->content;
                unsigned char *charIndex = charData;

                while (*charStart) {
                    if (*charStart != ' ' && *charStart != '\t' &&
                            *charStart != '\n')
                    {
                        *charIndex = *charStart;
                        charIndex++;
                    }
                    charStart++;
                }
                *charIndex = '\0';

                int binLen;
                unsigned char *binData =
                    php_base64_decode(charData, strlen((char*)charData),
                            &binLen);

                delete[] charData;

                if (binData) {
                    for (int i = 0; i < binLen - 3; i += 4) {
                        int gid = binData[i] |
                            binData[i + 1] << 8 |
                            binData[i + 2] << 16 |
                            binData[i + 3] << 24;

                        setTileWithGid(map, x, y, layer, gid);

                        x++;
                        if (x == w) {x = 0; y++;}
                    }
                    free(binData);
                }
            }
            else {
                // Read plain XML map file
                xmlNodePtr n2 = node->xmlChildrenNode;

                while (n2 != NULL)
                {
                    if (xmlStrEqual(n2->name, BAD_CAST "tile") && y < h)
                    {
                        int gid = getProperty(n2, "gid", -1);
                        setTileWithGid(map, x, y, layer, gid);

                        x++;
                        if (x == w) {x = 0; y++;}
                    }

                    n2 = n2->next;
                }
            }

            // There can be only one data element
            break;
        }

        node = node->next;
    }
}

Tileset* MapReader::readTileset(
        xmlNodePtr node, const std::string &path, Map *map)
{
    if (xmlHasProp(node, BAD_CAST "source")) {
        logger->log("Warning: External tilesets not supported yet.");
        return NULL;
    }

    int firstGid = getProperty(node, "firstgid", 0);
    int tw = getProperty(node, "tilewidth", map->getTileWidth());
    int th = getProperty(node, "tileheight", map->getTileHeight());

    node = node->xmlChildrenNode;

    while (node != NULL)
    {
        if (xmlStrEqual(node->name, BAD_CAST "image"))
        {
            xmlChar* source = xmlGetProp(node, BAD_CAST "source");

            if (source)
            {
                std::string sourceStr = std::string((const char*)source);
                sourceStr.erase(0, 3);  // Remove "../"

                ResourceManager *resman = ResourceManager::getInstance();
                Image* tilebmp = resman->getImage(sourceStr);

                if (tilebmp)
                {
                    Tileset *set = new Tileset(tilebmp, tw, th, firstGid);
                    xmlFree(source);
                    return set;
                }
                else {
                    logger->log("Warning: Failed to load tileset (%s)", source);
                }
            }

            break;
        }

        node = node->next;
    }

    return NULL;
}

int MapReader::getProperty(xmlNodePtr node, const char* name, int def)
{
    xmlChar *prop = xmlGetProp(node, BAD_CAST name);
    if (prop) {
        int val = atoi((char*)prop);
        xmlFree(prop);
        return val;
    }
    else {
        return def;
    }
}

Image *MapReader::getTileWithGid(int gid)
{
    Tileset *set = getTilesetWithGid(gid);

    if (set) {
        return set->spriteset[gid - set->getFirstGid()];
    }

    return NULL;
}

Tileset *MapReader::getTilesetWithGid(int gid)
{
    std::vector<Tileset*>::iterator i;
    Tileset *set = NULL;

    // Find the tileset with the highest firstGid below/eq to gid
    for (i = tilesets.begin(); i != tilesets.end(); ++i)
    {
        if ((*i)->getFirstGid() <= gid) {
            set = (*i);
        }
        else {
            break;
        }
    }

    if (set && (gid - set->getFirstGid()) < (int)set->spriteset.size())
    {
        return set;
    }

    return NULL;
}

void MapReader::setTileWithGid(Map *map, int x, int y, int layer, int gid)
{
    if (layer == 3)
    {
        Tileset *set = getTilesetWithGid(gid);
        map->setWalk(x, y,
                !set || (gid - set->getFirstGid() == 0));
    }
    else if (layer < 3) {
        map->setTile(x, y, layer, getTileWithGid(gid));
    }
}