296 lines
11 KiB
C#
296 lines
11 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Net;
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using System.Reflection;
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using Nini.Config;
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using log4net;
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using OpenMetaverse;
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using OpenSim.Framework;
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using OpenSim.Framework.Console;
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using OpenSim.Services.Interfaces;
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namespace OpenSim.Services.MapImageService
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{
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public class MapImageService : IMapImageService
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{
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private static readonly ILog m_log =
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LogManager.GetLogger(
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MethodBase.GetCurrentMethod().DeclaringType);
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private const int ZOOM_LEVELS = 8;
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private const int IMAGE_WIDTH = 256;
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private const int HALF_WIDTH = 128;
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private const int JPEG_QUALITY = 80;
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private static string m_TilesStoragePath = "maptiles";
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private static object m_Sync = new object();
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private static bool m_Initialized = false;
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private static string m_WaterTileFile = string.Empty;
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private static Color m_Watercolor = Color.FromArgb(29, 71, 95);
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public MapImageService(IConfigSource config)
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{
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if (!m_Initialized)
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{
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m_Initialized = true;
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m_log.Debug("[MAP IMAGE SERVICE]: Starting MapImage service");
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IConfig serviceConfig = config.Configs["MapImageService"];
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if (serviceConfig != null)
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{
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m_TilesStoragePath = serviceConfig.GetString("TilesStoragePath", m_TilesStoragePath);
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if (!Directory.Exists(m_TilesStoragePath))
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Directory.CreateDirectory(m_TilesStoragePath);
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m_WaterTileFile = Path.Combine(m_TilesStoragePath, "water.jpg");
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if (!File.Exists(m_WaterTileFile))
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{
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Bitmap waterTile = new Bitmap(IMAGE_WIDTH, IMAGE_WIDTH);
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FillImage(waterTile, m_Watercolor);
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waterTile.Save(m_WaterTileFile);
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}
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}
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}
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}
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#region IMapImageService
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public bool AddMapTile(int x, int y, byte[] imageData, out string reason)
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{
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reason = string.Empty;
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string fileName = GetFileName(1, x, y);
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lock (m_Sync)
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{
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try
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{
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using (FileStream f = File.Open(fileName, FileMode.OpenOrCreate, FileAccess.Write))
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f.Write(imageData, 0, imageData.Length);
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}
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catch (Exception e)
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{
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m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to save image file {0}: {1}", fileName, e);
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reason = e.Message;
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return false;
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}
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// Also save in png format?
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// Stitch seven more aggregate tiles together
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for (uint zoomLevel = 2; zoomLevel <= ZOOM_LEVELS; zoomLevel++)
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{
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// Calculate the width (in full resolution tiles) and bottom-left
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// corner of the current zoom level
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int width = (int)Math.Pow(2, (double)(zoomLevel - 1));
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int x1 = x - (x % width);
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int y1 = y - (y % width);
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if (!CreateTile(zoomLevel, x1, y1))
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{
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m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to create tile for {0} at zoom level {1}", fileName, zoomLevel);
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reason = string.Format("Map tile at zoom level {0} failed", zoomLevel);
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return false;
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}
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}
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}
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return true;
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}
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public byte[] GetMapTile(string fileName, out string format)
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{
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format = "jpg";
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string fullName = Path.Combine(m_TilesStoragePath, fileName);
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if (File.Exists(fullName))
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{
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format = Path.GetExtension(fileName).ToLower();
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m_log.DebugFormat("[MAP IMAGE SERVICE]: Found file {0}, extension {1}", fileName, format);
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return File.ReadAllBytes(fullName);
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}
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else if (File.Exists(m_WaterTileFile))
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{
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m_log.DebugFormat("[MAP IMAGE SERVICE]: File not found {0}, sending water", fileName);
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return File.ReadAllBytes(m_WaterTileFile);
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}
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else
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{
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m_log.DebugFormat("[MAP IMAGE SERVICE]: unable to get file {0}", fileName);
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return new byte[0];
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}
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}
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#endregion
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private string GetFileName(uint zoomLevel, int x, int y)
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{
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string extension = "jpg";
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return Path.Combine(m_TilesStoragePath, string.Format("map-{0}-{1}-{2}-objects.{3}", zoomLevel, x, y, extension));
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}
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private Bitmap GetInputTileImage(string fileName)
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{
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try
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{
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if (File.Exists(fileName))
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return new Bitmap(fileName);
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}
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catch (Exception e)
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{
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m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to read image data from {0}: {1}", fileName, e);
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}
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return null;
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}
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private Bitmap GetOutputTileImage(string fileName)
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{
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try
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{
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if (File.Exists(fileName))
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return new Bitmap(fileName);
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else
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{
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// Create a new output tile with a transparent background
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Bitmap bm = new Bitmap(IMAGE_WIDTH, IMAGE_WIDTH);
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bm.MakeTransparent();
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return bm;
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}
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}
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catch (Exception e)
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{
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m_log.WarnFormat("[MAP IMAGE SERVICE]: Unable to read image data from {0}: {1}", fileName, e);
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}
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return null;
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}
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private bool CreateTile(uint zoomLevel, int x, int y)
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{
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m_log.DebugFormat("[MAP IMAGE SERVICE]: Create tile for {0} {1}, zoom {2}", x, y, zoomLevel);
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int prevWidth = (int)Math.Pow(2, (double)zoomLevel - 2);
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int thisWidth = (int)Math.Pow(2, (double)zoomLevel - 1);
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// Convert x and y to the bottom left tile for this zoom level
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int xIn = x - (x % prevWidth);
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int yIn = y - (y % prevWidth);
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// Convert x and y to the bottom left tile for the next zoom level
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int xOut = x - (x % thisWidth);
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int yOut = y - (y % thisWidth);
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// Try to open the four input tiles from the previous zoom level
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Bitmap inputBL = GetInputTileImage(GetFileName(zoomLevel - 1, xIn, yIn));
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Bitmap inputBR = GetInputTileImage(GetFileName(zoomLevel - 1, xIn + prevWidth, yIn));
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Bitmap inputTL = GetInputTileImage(GetFileName(zoomLevel - 1, xIn, yIn + prevWidth));
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Bitmap inputTR = GetInputTileImage(GetFileName(zoomLevel - 1, xIn + prevWidth, yIn + prevWidth));
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// Open the output tile (current zoom level)
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string outputFile = GetFileName(zoomLevel, xOut, yOut);
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Bitmap output = GetOutputTileImage(outputFile);
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if (output == null)
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return false;
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FillImage(output, m_Watercolor);
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if (inputBL != null)
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{
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ImageCopyResampled(output, inputBL, 0, HALF_WIDTH, 0, 0);
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inputBL.Dispose();
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}
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if (inputBR != null)
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{
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ImageCopyResampled(output, inputBR, HALF_WIDTH, HALF_WIDTH, 0, 0);
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inputBR.Dispose();
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}
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if (inputTL != null)
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{
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ImageCopyResampled(output, inputTL, 0, 0, 0, 0);
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inputTL.Dispose();
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}
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if (inputTR != null)
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{
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ImageCopyResampled(output, inputTR, HALF_WIDTH, 0, 0, 0);
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inputTR.Dispose();
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}
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// Write the modified output
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try
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{
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using (Bitmap final = new Bitmap(output))
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{
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output.Dispose();
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final.Save(outputFile);
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}
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}
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catch (Exception e)
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{
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m_log.WarnFormat("[MAP IMAGE SERVICE]: Oops on saving {0} {1}", outputFile, e);
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}
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// Save also as png?
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return true;
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}
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#region Image utilities
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private void FillImage(Bitmap bm, Color c)
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{
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for (int x = 0; x < bm.Width; x++)
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for (int y = 0; y < bm.Height; y++)
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bm.SetPixel(x, y, c);
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}
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private void ImageCopyResampled(Bitmap output, Bitmap input, int destX, int destY, int srcX, int srcY)
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{
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int resamplingRateX = 2; // (input.Width - srcX) / (output.Width - destX);
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int resamplingRateY = 2; // (input.Height - srcY) / (output.Height - destY);
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for (int x = destX; x < destX + HALF_WIDTH; x++)
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for (int y = destY; y < destY + HALF_WIDTH; y++)
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{
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Color p = input.GetPixel(srcX + (x - destX) * resamplingRateX, srcY + (y - destY) * resamplingRateY);
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output.SetPixel(x, y, p);
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}
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}
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#endregion
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}
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}
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