summaryrefslogtreecommitdiff
path: root/src/resources/mapreader.cpp
blob: bddc1092dc949f2c50576fb7e16c588f752cad58 (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
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
/*
 *  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 "mapreader.h"

#include <cassert>
#include <zlib.h>

#include "resourcemanager.h"
#include "image.h"

#include "../base64.h"
#include "../log.h"
#include "../map.h"
#include "../tileset.h"

#include "../graphic/spriteset.h"


const unsigned int DEFAULT_TILE_WIDTH = 32;
const unsigned int DEFAULT_TILE_HEIGHT = 32;

/**
 * Inflates either zlib or gzip deflated memory. The inflated memory is
 * expected to be freed by the caller.
 */
int
inflateMemory(unsigned char *in, unsigned int inLength,
              unsigned char *&out, unsigned int &outLength)
{
    int bufferSize = 256 * 1024;
    int ret;
    z_stream strm;

    out = (unsigned char*)malloc(bufferSize);

    strm.zalloc = Z_NULL;
    strm.zfree = Z_NULL;
    strm.opaque = Z_NULL;
    strm.next_in = in;
    strm.avail_in = inLength;
    strm.next_out = out;
    strm.avail_out = bufferSize;

    ret = inflateInit2(&strm, 15 + 32);

    if (ret != Z_OK)
        return ret;

    do
    {
        if (strm.next_out == NULL)
        {
            inflateEnd(&strm);
            return Z_MEM_ERROR;
        }

        ret = inflate(&strm, Z_NO_FLUSH);
        assert(ret != Z_STREAM_ERROR);

        switch (ret) {
            case Z_NEED_DICT:
                ret = Z_DATA_ERROR;
            case Z_DATA_ERROR:
            case Z_MEM_ERROR:
                (void)inflateEnd(&strm);
                return ret;
        }

        if (ret != Z_STREAM_END)
        {
            out = (unsigned char*)realloc(out, bufferSize * 2);

            if (out == NULL)
            {
                inflateEnd(&strm);
                return Z_MEM_ERROR;
            }

            strm.next_out = out + bufferSize;
            strm.avail_out = bufferSize;
            bufferSize *= 2;
        }
    }
    while (ret != Z_STREAM_END);
    assert(strm.avail_in == 0);

    outLength = bufferSize - strm.avail_out;
    (void)inflateEnd(&strm);
    return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
}

Map*
MapReader::readMap(const std::string &filename)
{
    // Load the file through resource manager
    ResourceManager *resman = ResourceManager::getInstance();
    int fileSize;
    void *buffer = resman->loadFile(filename, fileSize);
    Map *map = NULL;

    if (buffer == NULL)
    {
        logger->log("Map file not found (%s)\n", filename.c_str());
        return NULL;
    }

    // Inflate the gzipped map data
    unsigned char *inflated;
    unsigned int inflatedSize = 0;
    int ret = inflateMemory((unsigned char*)buffer,
                            fileSize, inflated, inflatedSize);
    free(buffer);

    if (ret == Z_MEM_ERROR)
    {
        logger->log("Error: Out of memory while decompressing map data!");
        return NULL;
    }
    else if (ret == Z_VERSION_ERROR)
    {
        logger->log("Error: Incompatible zlib version!");
        return NULL;
    }
    else if (ret == Z_DATA_ERROR)
    {
        logger->log("Error: Incorrect zlib compressed data!");
        return NULL;
    }
    else if (ret != Z_OK || inflated == NULL)
    {
        logger->log("Error: Unknown error while decompressing map data!");
        return NULL;
    }

    xmlDocPtr doc = xmlParseMemory((char*)inflated, inflatedSize);
    free(inflated);

    // Parse the inflated map data
    if (doc) {
        xmlNodePtr node = xmlDocGetRootElement(doc);

        if (!node || !xmlStrEqual(node->name, BAD_CAST "map")) {
            logger->log("Error: Not a map file (%s)!", filename.c_str());
            return NULL;
        }
        else
        {
            map = readMap(node, filename);
        }
        xmlFreeDoc(doc);
    } else {
        logger->log("Error while parsing map file (%s)!", filename.c_str());
    }

    return map;
}

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);
    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, tilew, tileh);

    for (node = node->xmlChildrenNode; node != NULL; node = node->next)
    {
        if (xmlStrEqual(node->name, BAD_CAST "property"))
        {
            // Example: <property name="name" value="value"/>

            xmlChar *name = xmlGetProp(node, BAD_CAST "name");
            xmlChar *value = xmlGetProp(node, BAD_CAST "value");

            if (name && value)
            {
                map->setProperty((const char*)name, (const char*)value);
            }

            if (name) xmlFree(name);
            if (value) xmlFree(value);
        }
        else if (xmlStrEqual(node->name, BAD_CAST "tileset"))
        {
            Tileset *tileset = readTileset(node, pathDir, map);
            if (tileset) {
                map->addTileset(tileset);
            }
        }
        else if (xmlStrEqual(node->name, BAD_CAST "layer"))
        {
            logger->log("- Loading layer %d", layerNr);
            readLayer(node, map, layerNr);
            layerNr++;
        }
    }

    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;

                        map->setTileWithGid(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);
                        map->setTileWithGid(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);
                    tilebmp->decRef();
                    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;
    }
}