/// <summary>
/// 获取瓦片数据块对应在原始图像(1:1)中的像素坐标位置
/// </summary>
/// <param name="tile"></param>
/// <param name="beginRow"></param>
/// <param name="beginCol"></param>
/// <param name="width"></param>
/// <param name="height"></param>
public void GetOriginalRowColByDataBlock(TileIdentify tile, ref int beginRow, ref int beginCol, ref int width, ref int height)
{
beginRow = (int)(tile.BeginRow / Scale);
beginCol = (int)(tile.BeginCol / Scale);
width = (int)(tile.Width / Scale);
height = (int)(tile.Height / Scale);
}
private void DoAsyncCache(T[][] buffers, TileIdentify tile, int[] selectedBandNos)
{
for (int i = 0; i < _selectedBandNos.Length; i++)
{
_fileDiskCacheManager.PutTile <T>(tile, _selectedBandNos[i], buffers[i]);
}
}
void _loadWorker_DoWork(object sender, DoWorkEventArgs e)
{
bool isGDAL = _dataProvider is GeoDo.RSS.DF.GDAL.IGDALRasterDataProvider;
try
{
_loadWorkerIsCompleted = false;
if (isGDAL)
{
while (_loadStack.Count > 0)
{
lock (_lockDoWork)
{
TileIdentify tile = _loadStack.Pop();
DoLoadTile(tile);
}
}
}
else
{
while (_loadStack.Count > 0)
{
TileIdentify tile = _loadStack.Pop();
DoLoadTile(tile);
}
}
}
finally
{
_loadWorkerIsCompleted = true;
}
}
/// <summary>
/// 获取瓦片原始图像(1:1)中的像素坐标位置
/// </summary>
/// <param name="tile"></param>
/// <param name="beginRow"></param>
/// <param name="beginCol"></param>
/// <param name="width"></param>
/// <param name="height"></param>
public void GetOriginalRowCol(int tileSize, TileIdentify tile, ref int beginRow, ref int beginCol, ref int width, ref int height)
{
beginRow = (int)(tile.BeginRow / Scale - tile.OffsetY / Scale);
beginCol = (int)(tile.BeginCol / Scale - tile.OffsetX / Scale);
width = (int)(tileSize / Scale);
height = (int)(tileSize / Scale);
}
private Bitmap BuildBitmap(T[][] buffers, LevelDef level, TileIdentify tile)
{
using (IBitmapBuilder <T> builder = GetBitmapBuilder())
{
Bitmap bitmap = null;
if (buffers.Length == 1)
{
bitmap = new Bitmap(_tileSize, _tileSize, PixelFormat.Format8bppIndexed);
bitmap.Palette = BitmapBuilderFactory.GetDefaultGrayColorPalette();
if (st1 == null && _stretcher == null)
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], ref bitmap);
}
else
{
if (_stretcher != null)
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], _stretcher, ref bitmap);
}
else
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], st1.Stretcher, ref bitmap);
}
}
//
if (_colorMapTable != null)
{
ColorPalette plt = BitmapBuilderFactory.GetDefaultGrayColorPalette();
for (int i = 0; i < 256; i++)
{
plt.Entries[i] = Color.Black;
}
int idx = 1;
foreach (ColorMapItem <int> item in _colorMapTable.Items)
{
for (int v = item.MinValue; v < item.MaxValue; v++)
{
plt.Entries[idx] = item.Color;
}
idx++;
}
bitmap.Palette = plt;
}
}
else if (buffers.Length == 3)
{
bitmap = new Bitmap(_tileSize, _tileSize, PixelFormat.Format24bppRgb);
if (st1 == null || st2 == null || st3 == null)
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], buffers[1], buffers[2], ref bitmap);
}
else
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], buffers[1], buffers[2], st1.Stretcher, st2.Stretcher, st3.Stretcher, ref bitmap);
}
}
return(bitmap);
}
}
public void Dispose()
{
if (Bitmap != null)
{
Bitmap.Dispose();
Bitmap = null;
}
Tile = null;
}
public bool IsExist(TileIdentify tile, int[] selectedBandNos)
{
foreach (int b in selectedBandNos)
{
long id = long.Parse(b.ToString() + tile.TileNo.ToString());
if (!_cachedFiles.Contains(id))
{
return(false);
}
}
Console.WriteLine("existed : " + tile.TileNo.ToString());
return(true);
}
private TileBitmap LoadTileBitmap(TileIdentify tile)
{
int beginRow = 0, beginCol = 0, width = 0, height = 0;
LevelDef level = tile.Level;
level.GetOriginalRowColByDataBlock(tile, ref beginRow, ref beginCol, ref width, ref height);
TileBitmap tb = _dataProviderReader.CreateBitmapByTile(level, beginRow, beginCol, width, height, tile);
if (!_disposed && tb != null)
{
_tileCacheManager.Put(tb);
}
return(tb);
}
private TileBitmap LoadTileBitmap(TileIdentify tile, out bool memoryIsNotEnough)
{
memoryIsNotEnough = false;
int beginRow = 0, beginCol = 0, width = 0, height = 0;
LevelDef level = tile.Level;
level.GetOriginalRowColByDataBlock(tile, ref beginRow, ref beginCol, ref width, ref height);
TileBitmap tb = _dataProviderReader.CreateBitmapByTile(level, beginRow, beginCol, width, height, tile, out memoryIsNotEnough);
if (!_disposed && tb != null)
{
_tileCacheManager.Put(tb);
_loadedTitleCount++;
}
return(tb);
}
void _loadWorker_DoWork(object sender, DoWorkEventArgs e)
{
while (_loadStack.Count > 0)
{
TileIdentify tile = _loadStack.Pop();
if (tile == null)
{
continue;
}
if (!_tileCacheManager.IsExist(tile))
{
LoadTileBitmap(tile);
_asyncRefreshCanvas.BeginInvoke(tile, new AsyncCallback((ret) => { _isNotifyRefreshing = false; }), null);
}
}
}
private void DoLoadTile(TileIdentify tile)
{
if (!_tileCacheManager.IsExist(tile))
{
bool memoryIsNotEnough = false;
LoadTileBitmap(tile, out memoryIsNotEnough);
if (memoryIsNotEnough)
{
Console.WriteLine("_loadWorker_DoWork:内存不足，无法读取请求的瓦片！");
_loadWorkerIsCompleted = true;//这里的处理是错误的，应该是瓦片交换
return;
}
_loadWorker.ReportProgress((int)(_loadedTitleCount * 100f / _totalTileCount));
_asyncRefreshCanvas.BeginInvoke(tile, new AsyncCallback((ret) => { _isNotifyRefreshing = false; }), null);
}
}
private long GetOffsetByLevelBufferWhole(LevelDef[] levels, int iLevel, TileIdentify t)
{
int levelCount = levels.Length;
long offset = 0;
LevelDef lv;
for (int i = levelCount - 1; i >= 0; i--)
{
if (i == iLevel)
{
break;
}
lv = levels[i];
offset = lv.Size.Width * lv.Size.Height * _dataTypeSize + t.BeginRow * lv.Size.Width + t.BeginCol;
}
return(offset);
}
public void PutTile <T>(TileIdentify tile, int bandNo, T[] buffer)
{
long id = long.Parse(bandNo.ToString() + tile.TileNo.ToString());
if (_cachedFiles.Contains(id))
{
return;
}
string fname = GetTileBufferFileName(tile, bandNo);
int len = tile.Width * tile.Height * DataTypeHelper.SizeOf(_dataProvider.DataType);
byte[] dstBuffer = new byte[len];
GCHandle srcHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
GCHandle dstHandle = GCHandle.Alloc(dstBuffer, GCHandleType.Pinned);
try
{
WinAPI.MemoryCopy(dstHandle.AddrOfPinnedObject(), srcHandle.AddrOfPinnedObject(), len);
tryAgainLine:
try
{
File.WriteAllBytes(fname, dstBuffer);
}
catch (DirectoryNotFoundException)//缓存目录被删除
{
Directory.CreateDirectory(_fDir);
goto tryAgainLine;
}
catch (IOException ioex)
{
if (ioex.Message.Contains("磁盘空间"))
{
FileDiskCacheManagerFactory.TryFreeDiskspace(_fDir);
}
return;
}
_cachedFiles.Add(id);
}
finally
{
srcHandle.Free();
dstHandle.Free();
}
}
private void TryRefreshCanvas(TileIdentify tile)
{
_isNotifyRefreshing = true;
if (_currentLevel.LevelNo == tile.Level.LevelNo)
{
int beginRow = 0, beginCol = 0, width = 0, height = 0;
tile.Level.GetOriginalRowCol(_tileSetting.TileSize, tile, ref beginRow, ref beginCol, ref width, ref height);
if (beginRow > (_bRowAtViewWnd + _heightAtViewWnd) ||
beginCol > (_bColAtViewWnd + _widthAtViewWnd) ||
(beginRow + height) < _bRowAtViewWnd ||
(beginCol + width) < _bColAtViewWnd)
{
return;
}
_canvas.Refresh(enumRefreshType.All);
if (_canvas.SomeTileIsArrived != null)
{
_canvas.SomeTileIsArrived();
}
}
}
public T[] GetTile <T>(TileIdentify tile, int bandNo)
{
long id = long.Parse(bandNo.ToString() + tile.TileNo.ToString());
if (!_cachedFiles.Contains(id))
{
return(null);
}
int size = tile.Width * tile.Height;
int bytesSize = size * _dataTypeSize;
T[] dstBuffer = new T[size];
try
{
string fname = GetTileBufferFileName(tile, bandNo);
using (FileStream fs = new FileStream(fname, FileMode.Open))
{
fs.Read(_tileBuffer, 0, bytesSize);
GCHandle dstHandle = GCHandle.Alloc(dstBuffer, GCHandleType.Pinned);
try
{
WinAPI.MemoryCopy(dstHandle.AddrOfPinnedObject(), _tileBufferHandle.AddrOfPinnedObject(), bytesSize);
}
finally
{
dstHandle.Free();
}
return(dstBuffer);
}
}
catch (FileNotFoundException)
{
NotifyCacheIsCleared();
return(null);
}
}
/// <summary>
/// 获取视窗范围内指定行列号位置周围的瓦片
/// </summary>
/// <param name="tileSize">瓦片大小</param>
/// <param name="centerRow">指定行号</param>
/// <param name="centerCol">指定列号</param>
/// <param name="wndSize">视窗大小</param>
/// <returns></returns>
public TileIdentify[] GetAroundTiles(int tileSize, int centerRow, int centerCol, Size wndSize)
{
int bRow = centerRow, eRow = centerRow;
int bCol = centerCol, eCol = centerCol;
if (wndSize.Height > tileSize)
{
while ((eRow - bRow + 1) * tileSize < wndSize.Height)
{
eRow++;
bRow--;
}
}
if (wndSize.Width > tileSize)
{
while ((eCol - bCol + 1) * tileSize < wndSize.Width)
{
eCol++;
bCol--;
}
}
List <TileIdentify> tiles = new List <TileIdentify>();
for (int r = bRow; r <= eRow; r++)
{
for (int c = bCol; c < eCol; c++)
{
TileIdentify t = GetTileByRowCol(r, c);
if (t != null)
{
tiles.Add(t);
}
}
}
return(tiles.Count > 0 ? tiles.ToArray() : null);
}
private string GetKey(TileIdentify tile)
{
return(string.Format("L{0}R{1}C{2}", tile.Level.LevelNo, tile.Row, tile.Col));
}
public TileBitmap GetTileBitmap(TileIdentify tile)
{
LevelDef level = tile.Level;
return(_tileCacheManager.Get(level.LevelNo, tile.Row, tile.Col));
}
private string GetTileBufferFileName(TileIdentify tile, int bandNo)
{
return(Path.Combine(_fDir, string.Format("{0}{1}.RAW", bandNo, tile.TileNo)));
}
public TileBitmap CreateBitmapByTile(LevelDef level, int beginRow, int beginCol, int width, int height, TileIdentify tile)
{
lock (_lockObj)
{
T[][] buffers = null;
//从磁盘中读取缓存的瓦片
tryAgainLine:
if (_enableDiskCache && _fileDiskCacheManager.IsExist(tile, _selectedBandNos))
{
buffers = new T[_selectedBandNos.Length][];
for (int i = 0; i < _selectedBandNos.Length; i++)
{
buffers[i] = _fileDiskCacheManager.GetTile <T>(tile, _selectedBandNos[i]);
if (buffers[i] == null)//缓存已经从磁盘清除
{
goto tryAgainLine;
}
}
}
else
{
bool isOK = ReadRasterFile(out buffers, beginRow, beginCol, width, height, tile);
if (!isOK)
{
return(null);
}
Console.WriteLine("direct read , " + Environment.TickCount.ToString());
//将该瓦片保存在磁盘
if (_enableDiskCache)
{
_asyncCacheHandler.BeginInvoke(buffers, tile, _selectedBandNos, null, null);
}
}
TileBitmap tb = new TileBitmap();
tb.Level = level;
tb.Tile = tile;
tb.Bitmap = BuildBitmap(buffers, level, tile);
return(tb);
}
}
public TileBitmap CreateBitmapByTile(LevelDef level, int beginRow, int beginCol, int width, int height, TileIdentify tile, out bool memoryIsNotEnough)
{
memoryIsNotEnough = false;
try
{
T[][] buffers = null;
bool isOK = ReadRasterFile(out buffers, beginRow, beginCol, width, height, tile);
if (!isOK)
{
return(null);
}
TileBitmap tb = new TileBitmap();
tb.Level = level;
tb.Tile = tile;
tb.Bitmap = BuildBitmap(buffers, level, tile);
return(tb);
}
catch (OutOfMemoryException)
{
memoryIsNotEnough = true;
}
catch (ArgumentException)
{
memoryIsNotEnough = true;
}
return(null);
}
public TileBitmap Get(int levelNo, int row, int col)
{
int key = TileIdentify.GetTileNo(levelNo, row, col);
return(_cachedTiles.ContainsKey(key) ? _cachedTiles[key] : new TileBitmap());
}
public Tile(TileIdentify id, int bandNo, T[] data)
{
_id = id;
_bandNo = bandNo;
_data = data;
}
public bool IsExist(TileIdentify tile)
{
return(_cachedTiles.ContainsKey(tile.TileNo));
}
public TileIdentify[] GetTileIdentifies(int width, int height, out int rowCount, out int colCount)
{
int hPlaceholders = GetPlaceholder(width);
int hPlaceholderLeft = hPlaceholders / 2;
int hPlaceholderRight = hPlaceholderLeft;
if (hPlaceholders % 2 != 0)
{
hPlaceholderRight++;
}
//
int vPlaceholders = GetPlaceholder(height);
int vPlaceholderTop = vPlaceholders / 2;
int vPlaceholderBottom = vPlaceholderTop;
if (vPlaceholders % 2 != 0)
{
vPlaceholderBottom++;
}
//
int sizeX = width + hPlaceholderLeft + hPlaceholderRight;
int sizeY = height + vPlaceholderTop + vPlaceholderBottom;
rowCount = sizeY / _tileSize;
colCount = sizeX / _tileSize;
int beginRow = 0, beginCol = 0, dataWidth = 0, dataHeight = 0;
int offsetX = 0, offsetY = 0;
List <TileIdentify> tiles = new List <TileIdentify>();
beginRow = 0;
beginCol = 0;
for (int r = 0; r < rowCount; r++, beginRow = r * _tileSize - vPlaceholderTop, dataHeight = _tileSize, beginCol = 0)
{
offsetY = 0;
dataHeight = _tileSize;
if (r == 0)
{
offsetY = vPlaceholderTop;
dataHeight -= vPlaceholderTop;
}
if (r == rowCount - 1)
{
dataHeight -= vPlaceholderBottom;
}
for (int c = 0; c < colCount; c++, beginCol = c * _tileSize - hPlaceholderLeft, dataWidth = _tileSize)
{
offsetX = 0;
dataWidth = _tileSize;
if (c == 0)
{
offsetX = hPlaceholderLeft;
dataWidth -= hPlaceholderLeft;
}
if (c == colCount - 1)
{
dataWidth -= hPlaceholderRight;
}
//
TileIdentify tile = new TileIdentify(r, c, offsetX, offsetY, beginRow, beginCol, dataWidth, dataHeight);
tiles.Add(tile);
}
}
return(tiles.Count > 0 ? tiles.ToArray() : null);
}
private bool ReadRasterFile(out T[][] buffers, int offsetY, int offsetX, int xSize, int ySize, TileIdentify tile)
{
int size = tile.Width * tile.Height;
int bands = _selectedBandNos.Length;
buffers = new T[bands][];
for (int i = 0; i < bands; i++)
{
//eg:1,2,1
if (_selectedBandNos.Length == 3)
{
for (int p = 0; p < i; p++)
{
if (_selectedBandNos[p] == _selectedBandNos[i])
{
buffers[i] = buffers[p];
goto nexti;
}
}
}
buffers[i] = new T[size];
GCHandle handle = GCHandle.Alloc(buffers[i], GCHandleType.Pinned);
try
{
//disposed
if (_dataProvider == null || i >= _selectedBandNos.Length)
{
return(false);
}
_dataProvider.GetRasterBand(_selectedBandNos[i]).Read(offsetX, offsetY, xSize, ySize, handle.AddrOfPinnedObject(), _dataProvider.DataType, tile.Width, tile.Height);
}
finally
{
handle.Free();
}
nexti :;
}
return(true);
}
