public Bitmap GetMap(BoundingBox box, Size sizePicMain, int intMapLevel)
{
Bitmap bmpResult = new Bitmap(sizePicMain.Width, sizePicMain.Height);
Graphics g = Graphics.FromImage(bmpResult);
g.Clear(Color.White);
#region 绘制图片
ArrayList list = GetAllmapPieceInfo(box, intMapLevel);
for (int i = 0; i < list.Count; i++)
{
MapPieceInfo mpi = list[i] as MapPieceInfo;
byte[] file = Getpic(mpi.filename);
if (file != null && file.Length > 0)
{
Bitmap itemMap = new Bitmap(new MemoryStream(file));
g.DrawImage(itemMap, mpi.destRect, mpi.srcRect, GraphicsUnit.Pixel);
}
}
#endregion
g.Dispose();
return(bmpResult);
}
/// <summary>
/// 调整下载图片顺序,以中心向四周下载
/// </summary>
public ArrayList RePrioritymapPiece(ArrayList list)
{
if (list.Count < 2)
{
return(list);
}
MapPieceInfo temp = null;
for (int i = 0; i < list.Count; i++)
{
for (int j = i + 1; j < list.Count; j++)
{
MapPieceInfo m1 = list[i] as MapPieceInfo;
MapPieceInfo m2 = list[j] as MapPieceInfo;
if (m1.Priority > m2.Priority)
{
temp = m1;
m1 = m2;
m2 = temp;
list[i] = m1;
list[j] = m2;
}
}
}
return(list);
}
/// <summary>
/// 获取地图块拼接信息
/// </summary>
/// <param name="box"></param>
/// <param name="size"></param>
/// <param name="level"></param>
/// <returns></returns>
public ArrayList GetAllmapPieceInfo(BoundingBox box, int level)
{
ArrayList list = new ArrayList();
PauseMapViewInfo PI = new PauseMapViewInfo(box, level);
SogouMapInfo maptypeinfo = new SogouMapInfo();
//计算第一个图片块的左上角所处图像位置
PointD p = maptypeinfo.PixelToImage(PI.topPoint, new PointD(box.Min.X, box.Max.Y), level);
#region 计算图片
int Width = PI.maxColIndex - PI.minColIndex + 1;
int Height = PI.maxRowIndex - PI.minRowIndex + 1;
int centerX = (Width - 1) / 2;
int centerY = (Height - 1) / 2;
int intTest = 0;
for (int rowIndex = PI.minRowIndex; rowIndex <= PI.maxRowIndex; rowIndex++)
{
for (int colIndex = PI.minColIndex; colIndex <= PI.maxColIndex; colIndex++)
{
intTest++;
Rectangle destRect = new Rectangle((colIndex - PI.minColIndex) * maptypeinfo.tileSize + (int)Math.Round(p.X), (rowIndex - PI.minRowIndex) * maptypeinfo.tileSize + (int)Math.Round(p.Y), maptypeinfo.tileSize, maptypeinfo.tileSize);
string filename = ZYB.GIS.GoogleMapType.GetFileName(colIndex, rowIndex, level);
Rectangle srcRect = new Rectangle(0, 0, maptypeinfo.tileSize, maptypeinfo.tileSize);
MapPieceInfo mp = new MapPieceInfo();
int x = colIndex - PI.minColIndex;
int y = rowIndex - PI.minRowIndex;
mp.Priority = (x - centerX) * (x - centerX) + (y - centerY) * (y - centerY);
mp.filename = filename;
mp.destRect = destRect;
mp.srcRect = srcRect;
list.Add(mp);
}
}
string ww = intTest.ToString();
#endregion
return(RePrioritymapPiece(list));
}
