aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Services/MapImageService/MapImageService.cs
blob: 6728752122c5b66bb2ede2f3f92b0935476886db (plain)
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
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * The design of this map service is based on SimianGrid's PHP-based 
 * map service. See this URL for the original PHP version:
 * https://github.com/openmetaversefoundation/simiangrid/
 */

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Net;
using System.Reflection;
using System.Threading;

using Nini.Config;
using log4net;
using OpenMetaverse;

using OpenSim.Framework;
using OpenSim.Framework.Console;
using OpenSim.Services.Interfaces;


namespace OpenSim.Services.MapImageService
{
    public class MapImageService : IMapImageService
    {
        private static readonly ILog m_log =
                LogManager.GetLogger(
                MethodBase.GetCurrentMethod().DeclaringType);
#pragma warning disable 414
        private string LogHeader = "[MAP IMAGE SERVICE]";
#pragma warning restore 414

        private const int ZOOM_LEVELS = 8;
        private const int IMAGE_WIDTH = 256;
        private const int HALF_WIDTH = 128;
        private const int JPEG_QUALITY = 80;

        private static string m_TilesStoragePath = "maptiles";

        private static object m_Sync = new object();
        private static bool m_Initialized = false;
        private static string m_WaterTileFile = string.Empty;
        private static Color m_Watercolor = Color.FromArgb(29, 71, 95);
        private static Bitmap m_WaterBitmap = null;
        private static byte[] m_WaterBytes = null;

        public MapImageService(IConfigSource config)
        {
            if (!m_Initialized)
            {
                m_Initialized = true;
                m_log.Debug("[MAP IMAGE SERVICE]: Starting MapImage service");

                IConfig serviceConfig = config.Configs["MapImageService"];
                if (serviceConfig != null)
                {
                    m_TilesStoragePath = serviceConfig.GetString("TilesStoragePath", m_TilesStoragePath);
                    if (!Directory.Exists(m_TilesStoragePath))
                        Directory.CreateDirectory(m_TilesStoragePath);


                    m_WaterTileFile = Path.Combine(m_TilesStoragePath, "water.jpg");
                    if (!File.Exists(m_WaterTileFile))
                    {
                        Bitmap waterTile = new Bitmap(IMAGE_WIDTH, IMAGE_WIDTH);
                        FillImage(waterTile, m_Watercolor);
                        waterTile.Save(m_WaterTileFile, ImageFormat.Jpeg);
                        m_WaterBitmap = waterTile;
                    }

                    if (File.Exists(m_WaterTileFile))
                    {
                        m_WaterBitmap = new Bitmap(m_WaterTileFile);
                        using (MemoryStream ms = new MemoryStream())
                        {
                            m_WaterBitmap.Save(ms,ImageFormat.Jpeg);
                            ms.Seek(0, SeekOrigin.Begin);
                            m_WaterBytes = ms.ToArray();
                        }
                    }
                }
            }
        }

        #region IMapImageService

        public bool AddMapTile(int x, int y, byte[] imageData, UUID scopeID, out string reason)
        {
            reason = string.Empty;
            string fileName = GetFileName(1, x, y, scopeID);

            lock (m_Sync)
            {
                try
                {
                    using (FileStream f = File.Open(fileName, FileMode.OpenOrCreate, FileAccess.Write))
                        f.Write(imageData, 0, imageData.Length);
                }
                catch (Exception e)
                {
                    m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to save image file {0}: {1}", fileName, e);
                    reason = e.Message;
                    return false;
                }
            }

            return UpdateMultiResolutionFiles(x, y, scopeID, out reason);
        }

        public bool RemoveMapTile(int x, int y, UUID scopeID, out string reason)
        {
            reason = String.Empty;
            string fileName = GetFileName(1, x, y, scopeID);

            lock (m_Sync)
            {
                try
                {
                    File.Delete(fileName);
                }
                catch (Exception e)
                {

                    m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to save delete file {0}: {1}", fileName, e);
                    reason = e.Message;
                    return false;
                }
            }
            return UpdateMultiResolutionFiles(x, y, scopeID, out reason);
        }


        // When large varregions start up, they can send piles of new map tiles. This causes
        //    this multi-resolution routine to be called a zillion times an causes much CPU
        //    time to be spent creating multi-resolution tiles that will be replaced when
        //    the next maptile arrives.
        private class mapToMultiRez
        {
            public int xx;
            public int yy;
            public UUID scopeID;
            public mapToMultiRez(int pX, int pY, UUID pscopeID)
            {
                xx = pX;
                yy = pY;
                scopeID = pscopeID;
            }
        };
        private Queue<mapToMultiRez> multiRezToBuild = new Queue<mapToMultiRez>();

        private bool UpdateMultiResolutionFiles(int x, int y, UUID scopeID, out string reason)
        {
            reason = String.Empty;

            lock (multiRezToBuild)
            {
                // m_log.DebugFormat("{0} UpdateMultiResolutionFilesAsync: scheduling update for <{1},{2}>", LogHeader, x, y);
                multiRezToBuild.Enqueue(new mapToMultiRez(x, y, scopeID));
                if (multiRezToBuild.Count == 1)
                    Util.FireAndForget(
                        DoUpdateMultiResolutionFilesAsync);
            }

            return true;
        }

        private void DoUpdateMultiResolutionFilesAsync(object o)
        {
            // let acumulate large region tiles
            Thread.Sleep(60 * 1000); // large regions take time to upload tiles

            while (multiRezToBuild.Count > 0)
            {
                mapToMultiRez toMultiRez = null;
                lock (multiRezToBuild)
                {
                    if (multiRezToBuild.Count > 0)
                        toMultiRez = multiRezToBuild.Dequeue();
                }
                if (toMultiRez != null)
                {
                    int x = toMultiRez.xx;
                    int y = toMultiRez.yy;
                    UUID scopeID = toMultiRez.scopeID;
                    // m_log.DebugFormat("{0} DoUpdateMultiResolutionFilesAsync: doing build for <{1},{2}>", LogHeader, x, y);

                    int width = 1;

                    // Stitch seven more aggregate tiles together
                    for (uint zoomLevel = 2; zoomLevel <= ZOOM_LEVELS; zoomLevel++)
                    {
                        // Calculate the width (in full resolution tiles) and bottom-left
                        // corner of the current zoom level
                        width *= 2;
                        int x1 = x - (x % width);
                        int y1 = y - (y % width);

                        lock (m_Sync)   // must lock the reading and writing of the maptile files
                        {
                            if (!CreateTile(zoomLevel, x1, y1, scopeID))
                            {
                                m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to create tile for {0},{1} at zoom level {1}", x, y, zoomLevel);
                                return;
                            }
                        }
                    }
                }
            }
            return;
        }

        public byte[] GetMapTile(string fileName, UUID scopeID, out string format)
        {
//            m_log.DebugFormat("[MAP IMAGE SERVICE]: Getting map tile {0}", fileName);

            format = ".jpg";
            string fullName = Path.Combine(m_TilesStoragePath, scopeID.ToString());
            fullName = Path.Combine(fullName, fileName);
            if (File.Exists(fullName))
            {
                format = Path.GetExtension(fileName).ToLower();
                //m_log.DebugFormat("[MAP IMAGE SERVICE]: Found file {0}, extension {1}", fileName, format);
                return File.ReadAllBytes(fullName);
            }
            else if (m_WaterBytes != null)
            {
                return (byte[])m_WaterBytes.Clone();
            }
            else
            {
                m_log.DebugFormat("[MAP IMAGE SERVICE]: unable to get file {0}", fileName);
                return new byte[0];
            }
        }

        #endregion


        private string GetFileName(uint zoomLevel, int x, int y, UUID scopeID)
        {
            string extension = "jpg";
            string path = Path.Combine(m_TilesStoragePath, scopeID.ToString());
            Directory.CreateDirectory(path);
            return Path.Combine(path, string.Format("map-{0}-{1}-{2}-objects.{3}", zoomLevel, x, y, extension));
        }

        private Bitmap GetInputTileImage(string fileName)
        {
            try
            {
                if (File.Exists(fileName))
                    return new Bitmap(fileName);
            }
            catch (Exception e)
            {
                m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to read image data from {0}: {1}", fileName, e);
            }

            return null;
        }

        private Bitmap GetOutputTileImage(string fileName)
        {
            try
            {
                if (File.Exists(fileName))                    
                    return new Bitmap(fileName);

                else
                {
                    // Create a new output tile with a transparent background
                    Bitmap bm = new Bitmap(IMAGE_WIDTH, IMAGE_WIDTH, PixelFormat.Format24bppRgb);
                    //bm.MakeTransparent(); // 24bpp does not have transparency, this whould make it 32bpp
                    return bm;
                }
            }
            catch (Exception e)
            {
                m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to read image data from {0}: {1}", fileName, e);
            }

            return null;
        }

        private bool CreateTile(uint zoomLevel, int x, int y, UUID scopeID)
        {
//            m_log.DebugFormat("[MAP IMAGE SERVICE]: Create tile for {0} {1}, zoom {2}", x, y, zoomLevel);
            int prevWidth = (int)Math.Pow(2, (double)zoomLevel - 2);
            int thisWidth = (int)Math.Pow(2, (double)zoomLevel - 1);

            // Convert x and y to the bottom left tile for this zoom level
            int xIn = x - (x % prevWidth);
            int yIn = y - (y % prevWidth);

            // Convert x and y to the bottom left tile for the next zoom level
            int xOut = x - (x % thisWidth);
            int yOut = y - (y % thisWidth);

            // Try to open the four input tiles from the previous zoom level
            Bitmap inputBL = GetInputTileImage(GetFileName(zoomLevel - 1, xIn, yIn, scopeID));
            Bitmap inputBR = GetInputTileImage(GetFileName(zoomLevel - 1, xIn + prevWidth, yIn, scopeID));
            Bitmap inputTL = GetInputTileImage(GetFileName(zoomLevel - 1, xIn, yIn + prevWidth, scopeID));
            Bitmap inputTR = GetInputTileImage(GetFileName(zoomLevel - 1, xIn + prevWidth, yIn + prevWidth, scopeID));

            // Open the output tile (current zoom level)
            string outputFile = GetFileName(zoomLevel, xOut, yOut, scopeID);

            int ntiles = 0;
            Bitmap output = (Bitmap)m_WaterBitmap.Clone();

            if (inputBL != null)
            {
                ImageCopyResampled(output, inputBL, 0, HALF_WIDTH, 0, 0);
                inputBL.Dispose();
                ntiles++;
            }
            if (inputBR != null)
            {
                ImageCopyResampled(output, inputBR, HALF_WIDTH, HALF_WIDTH, 0, 0);
                inputBR.Dispose();
                ntiles++;
            }
            if (inputTL != null)
            {
                ImageCopyResampled(output, inputTL, 0, 0, 0, 0);
                inputTL.Dispose();
                ntiles++;
            }
            if (inputTR != null)
            {
                ImageCopyResampled(output, inputTR, HALF_WIDTH, 0, 0, 0);
                inputTR.Dispose();
                ntiles++;
            }

            // Write the modified output
            if (ntiles == 0)
                File.Delete(outputFile);

            else
            {

                try
                {
                    output.Save(outputFile, ImageFormat.Jpeg);
                }
                catch (Exception e)
                {
                    m_log.WarnFormat("[MAP IMAGE SERVICE]: Oops on saving {0} {1}", outputFile, e);
                }
            }            // Save also as png?

            output.Dispose();
            return true;
        }

        #region Image utilities

        private void FillImage(Bitmap bm, Color c)
        {
            for (int x = 0; x < bm.Width; x++)
                for (int y = 0; y < bm.Height; y++)
                    bm.SetPixel(x, y, c);
        }

        private void ImageCopyResampled(Bitmap output, Bitmap input, int destX, int destY, int srcX, int srcY)
        {
            int resamplingRateX = 2; // (input.Width - srcX) / (output.Width - destX);
            int resamplingRateY = 2; //  (input.Height - srcY) / (output.Height - destY);

            for (int x = destX; x < destX + HALF_WIDTH; x++)
                for (int y = destY; y < destY + HALF_WIDTH; y++)
                {
                    Color p = input.GetPixel(srcX + (x - destX) * resamplingRateX, srcY + (y - destY) * resamplingRateY);
                    output.SetPixel(x, y, p);
                }
        }

        #endregion
    }
}